/* piexifjs

The MIT License (MIT)

Copyright (c) 2014, 2015 hMatoba(https://github.com/hMatoba)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

(function () {
    "use strict";
    var that = {};
    that.version = "1.03";

    that.remove = function (jpeg) {
        var b64 = false;
        if (jpeg.slice(0, 2) == "\xff\xd8") {
        } else if (jpeg.slice(0, 23) == "data:image/jpeg;base64," || jpeg.slice(0, 22) == "data:image/jpg;base64,") {
            jpeg = atob(jpeg.split(",")[1]);
            b64 = true;
        } else {
            throw ("Given data is not jpeg.");
        }
        
        var segments = splitIntoSegments(jpeg);
        if (segments[1].slice(0, 2) == "\xff\xe1" && 
               segments[1].slice(4, 10) == "Exif\x00\x00") {
            segments = [segments[0]].concat(segments.slice(2));
        } else if (segments[2].slice(0, 2) == "\xff\xe1" &&
                   segments[2].slice(4, 10) == "Exif\x00\x00") {
            segments = segments.slice(0, 2).concat(segments.slice(3));
        } else {
            throw("Exif not found.");
        }
        
        var new_data = segments.join("");
        if (b64) {
            new_data = "data:image/jpeg;base64," + btoa(new_data);
        }

        return new_data;
    };


    that.insert = function (exif, jpeg) {
        var b64 = false;
        if (exif.slice(0, 6) != "\x45\x78\x69\x66\x00\x00") {
            throw ("Given data is not exif.");
        }
        if (jpeg.slice(0, 2) == "\xff\xd8") {
        } else if (jpeg.slice(0, 23) == "data:image/jpeg;base64," || jpeg.slice(0, 22) == "data:image/jpg;base64,") {
            jpeg = atob(jpeg.split(",")[1]);
            b64 = true;
        } else {
            throw ("Given data is not jpeg.");
        }

        var exifStr = "\xff\xe1" + pack(">H", [exif.length + 2]) + exif;
        var segments = splitIntoSegments(jpeg);
        var new_data = mergeSegments(segments, exifStr);
        if (b64) {
            new_data = "data:image/jpeg;base64," + btoa(new_data);
        }

        return new_data;
    };


    that.load = function (data) {
        var input_data;
        if (typeof (data) == "string") {
            if (data.slice(0, 2) == "\xff\xd8") {
                input_data = data;
            } else if (data.slice(0, 23) == "data:image/jpeg;base64," || data.slice(0, 22) == "data:image/jpg;base64,") {
                input_data = atob(data.split(",")[1]);
            } else if (data.slice(0, 4) == "Exif") {
                input_data = data.slice(6);
            } else {
                throw ("'load' gots invalid file data.");
            }
        } else {
            throw ("'load' gots invalid type argument.");
        }

        var exifDict = {};
        var exif_dict = {
            "0th": {},
            "Exif": {},
            "GPS": {},
            "Interop": {},
            "1st": {},
            "thumbnail": null
        };
        var exifReader = new ExifReader(input_data);
        if (exifReader.tiftag === null) {
            return exif_dict;
        }

        if (exifReader.tiftag.slice(0, 2) == "\x49\x49") {
            exifReader.endian_mark = "<";
        } else {
            exifReader.endian_mark = ">";
        }

        var pointer = unpack(exifReader.endian_mark + "L",
            exifReader.tiftag.slice(4, 8))[0];
        exif_dict["0th"] = exifReader.get_ifd(pointer, "0th");

        var first_ifd_pointer = exif_dict["0th"]["first_ifd_pointer"];
        delete exif_dict["0th"]["first_ifd_pointer"];

        if (34665 in exif_dict["0th"]) {
            pointer = exif_dict["0th"][34665];
            exif_dict["Exif"] = exifReader.get_ifd(pointer, "Exif");
        }
        if (34853 in exif_dict["0th"]) {
            pointer = exif_dict["0th"][34853];
            exif_dict["GPS"] = exifReader.get_ifd(pointer, "GPS");
        }
        if (40965 in exif_dict["Exif"]) {
            pointer = exif_dict["Exif"][40965];
            exif_dict["Interop"] = exifReader.get_ifd(pointer, "Interop");
        }
        if (first_ifd_pointer != "\x00\x00\x00\x00") {
            pointer = unpack(exifReader.endian_mark + "L",
                first_ifd_pointer)[0];
            exif_dict["1st"] = exifReader.get_ifd(pointer, "1st");
            if ((513 in exif_dict["1st"]) && (514 in exif_dict["1st"])) {
                var end = exif_dict["1st"][513] + exif_dict["1st"][514];
                var thumb = exifReader.tiftag.slice(exif_dict["1st"][513], end);
                exif_dict["thumbnail"] = thumb;
            }
        }

        return exif_dict;
    };


    that.dump = function (exif_dict_original) {
        var TIFF_HEADER_LENGTH = 8;

        var exif_dict = copy(exif_dict_original);
        var header = "Exif\x00\x00\x4d\x4d\x00\x2a\x00\x00\x00\x08";
        var exif_is = false;
        var gps_is = false;
        var interop_is = false;
        var first_is = false;

        var zeroth_ifd,
            exif_ifd,
            interop_ifd,
            gps_ifd,
            first_ifd;
        
        if ("0th" in exif_dict) {
            zeroth_ifd = exif_dict["0th"];
        } else {
            zeroth_ifd = {};
        }
        
        if ((("Exif" in exif_dict) && (Object.keys(exif_dict["Exif"]).length)) ||
            (("Interop" in exif_dict) && (Object.keys(exif_dict["Interop"]).length))) {
            zeroth_ifd[34665] = 1;
            exif_is = true;
            exif_ifd = exif_dict["Exif"];
            if (("Interop" in exif_dict) && Object.keys(exif_dict["Interop"]).length) {
                exif_ifd[40965] = 1;
                interop_is = true;
                interop_ifd = exif_dict["Interop"];
            } else if (Object.keys(exif_ifd).indexOf(that.ExifIFD.InteroperabilityTag.toString()) > -1) {
                delete exif_ifd[40965];
            }
        } else if (Object.keys(zeroth_ifd).indexOf(that.ImageIFD.ExifTag.toString()) > -1) {
            delete zeroth_ifd[34665];
        }

        if (("GPS" in exif_dict) && (Object.keys(exif_dict["GPS"]).length)) {
            zeroth_ifd[that.ImageIFD.GPSTag] = 1;
            gps_is = true;
            gps_ifd = exif_dict["GPS"];
        } else if (Object.keys(zeroth_ifd).indexOf(that.ImageIFD.GPSTag.toString()) > -1) {
            delete zeroth_ifd[that.ImageIFD.GPSTag];
        }
        
        if (("1st" in exif_dict) &&
            ("thumbnail" in exif_dict) &&
            (exif_dict["thumbnail"] != null)) {
            first_is = true;
            exif_dict["1st"][513] = 1;
            exif_dict["1st"][514] = 1;
            first_ifd = exif_dict["1st"];
        }
        
        var zeroth_set = _dict_to_bytes(zeroth_ifd, "0th", 0);
        var zeroth_length = (zeroth_set[0].length + exif_is * 12 + gps_is * 12 + 4 +
            zeroth_set[1].length);

        var exif_set,
            exif_bytes = "",
            exif_length = 0,
            gps_set,
            gps_bytes = "",
            gps_length = 0,
            interop_set,
            interop_bytes = "",
            interop_length = 0,
            first_set,
            first_bytes = "",
            thumbnail;
        if (exif_is) {
            exif_set = _dict_to_bytes(exif_ifd, "Exif", zeroth_length);
            exif_length = exif_set[0].length + interop_is * 12 + exif_set[1].length;
        }
        if (gps_is) {
            gps_set = _dict_to_bytes(gps_ifd, "GPS", zeroth_length + exif_length);
            gps_bytes = gps_set.join("");
            gps_length = gps_bytes.length;
        }
        if (interop_is) {
            var offset = zeroth_length + exif_length + gps_length;
            interop_set = _dict_to_bytes(interop_ifd, "Interop", offset);
            interop_bytes = interop_set.join("");
            interop_length = interop_bytes.length;
        }
        if (first_is) {
            var offset = zeroth_length + exif_length + gps_length + interop_length;
            first_set = _dict_to_bytes(first_ifd, "1st", offset);
            thumbnail = _get_thumbnail(exif_dict["thumbnail"]);
            if (thumbnail.length > 64000) {
                throw ("Given thumbnail is too large. max 64kB");
            }
        }

        var exif_pointer = "",
            gps_pointer = "",
            interop_pointer = "",
            first_ifd_pointer = "\x00\x00\x00\x00";
        if (exif_is) {
            var pointer_value = TIFF_HEADER_LENGTH + zeroth_length;
            var pointer_str = pack(">L", [pointer_value]);
            var key = 34665;
            var key_str = pack(">H", [key]);
            var type_str = pack(">H", [TYPES["Long"]]);
            var length_str = pack(">L", [1]);
            exif_pointer = key_str + type_str + length_str + pointer_str;
        }
        if (gps_is) {
            var pointer_value = TIFF_HEADER_LENGTH + zeroth_length + exif_length;
            var pointer_str = pack(">L", [pointer_value]);
            var key = 34853;
            var key_str = pack(">H", [key]);
            var type_str = pack(">H", [TYPES["Long"]]);
            var length_str = pack(">L", [1]);
            gps_pointer = key_str + type_str + length_str + pointer_str;
        }
        if (interop_is) {
            var pointer_value = (TIFF_HEADER_LENGTH +
                zeroth_length + exif_length + gps_length);
            var pointer_str = pack(">L", [pointer_value]);
            var key = 40965;
            var key_str = pack(">H", [key]);
            var type_str = pack(">H", [TYPES["Long"]]);
            var length_str = pack(">L", [1]);
            interop_pointer = key_str + type_str + length_str + pointer_str;
        }
        if (first_is) {
            var pointer_value = (TIFF_HEADER_LENGTH + zeroth_length +
                exif_length + gps_length + interop_length);
            first_ifd_pointer = pack(">L", [pointer_value]);
            var thumbnail_pointer = (pointer_value + first_set[0].length + 24 +
                4 + first_set[1].length);
            var thumbnail_p_bytes = ("\x02\x01\x00\x04\x00\x00\x00\x01" +
                pack(">L", [thumbnail_pointer]));
            var thumbnail_length_bytes = ("\x02\x02\x00\x04\x00\x00\x00\x01" +
                pack(">L", [thumbnail.length]));
            first_bytes = (first_set[0] + thumbnail_p_bytes +
                thumbnail_length_bytes + "\x00\x00\x00\x00" +
                first_set[1] + thumbnail);
        }

        var zeroth_bytes = (zeroth_set[0] + exif_pointer + gps_pointer +
            first_ifd_pointer + zeroth_set[1]);
        if (exif_is) {
            exif_bytes = exif_set[0] + interop_pointer + exif_set[1];
        }

        return (header + zeroth_bytes + exif_bytes + gps_bytes +
            interop_bytes + first_bytes);
    };


    function copy(obj) {
        return JSON.parse(JSON.stringify(obj));
    }


    function _get_thumbnail(jpeg) {
        var segments = splitIntoSegments(jpeg);
        while (("\xff\xe0" <= segments[1].slice(0, 2)) && (segments[1].slice(0, 2) <= "\xff\xef")) {
            segments = [segments[0]].concat(segments.slice(2));
        }
        return segments.join("");
    }


    function _pack_byte(array) {
        return pack(">" + nStr("B", array.length), array);
    }


    function _pack_short(array) {
        return pack(">" + nStr("H", array.length), array);
    }


    function _pack_long(array) {
        return pack(">" + nStr("L", array.length), array);
    }


    function _value_to_bytes(raw_value, value_type, offset) {
        var four_bytes_over = "";
        var value_str = "";
        var length,
            new_value,
            num,
            den;

        if (value_type == "Byte") {
            length = raw_value.length;
            if (length <= 4) {
                value_str = (_pack_byte(raw_value) +
                    nStr("\x00", 4 - length));
            } else {
                value_str = pack(">L", [offset]);
                four_bytes_over = _pack_byte(raw_value);
            }
        } else if (value_type == "Short") {
            length = raw_value.length;
            if (length <= 2) {
                value_str = (_pack_short(raw_value) +
                    nStr("\x00\x00", 2 - length));
            } else {
                value_str = pack(">L", [offset]);
                four_bytes_over = _pack_short(raw_value);
            }
        } else if (value_type == "Long") {
            length = raw_value.length;
            if (length <= 1) {
                value_str = _pack_long(raw_value);
            } else {
                value_str = pack(">L", [offset]);
                four_bytes_over = _pack_long(raw_value);
            }
        } else if (value_type == "Ascii") {
            new_value = raw_value + "\x00";
            length = new_value.length;
            if (length > 4) {
                value_str = pack(">L", [offset]);
                four_bytes_over = new_value;
            } else {
                value_str = new_value + nStr("\x00", 4 - length);
            }
        } else if (value_type == "Rational") {
            if (typeof (raw_value[0]) == "number") {
                length = 1;
                num = raw_value[0];
                den = raw_value[1];
                new_value = pack(">L", [num]) + pack(">L", [den]);
            } else {
                length = raw_value.length;
                new_value = "";
                for (var n = 0; n < length; n++) {
                    num = raw_value[n][0];
                    den = raw_value[n][1];
                    new_value += (pack(">L", [num]) +
                        pack(">L", [den]));
                }
            }
            value_str = pack(">L", [offset]);
            four_bytes_over = new_value;
        } else if (value_type == "SRational") {
            if (typeof (raw_value[0]) == "number") {
                length = 1;
                num = raw_value[0];
                den = raw_value[1];
                new_value = pack(">l", [num]) + pack(">l", [den]);
            } else {
                length = raw_value.length;
                new_value = "";
                for (var n = 0; n < length; n++) {
                    num = raw_value[n][0];
                    den = raw_value[n][1];
                    new_value += (pack(">l", [num]) +
                        pack(">l", [den]));
                }
            }
            value_str = pack(">L", [offset]);
            four_bytes_over = new_value;
        } else if (value_type == "Undefined") {
            length = raw_value.length;
            if (length > 4) {
                value_str = pack(">L", [offset]);
                four_bytes_over = raw_value;
            } else {
                value_str = raw_value + nStr("\x00", 4 - length);
            }
        }

        var length_str = pack(">L", [length]);

        return [length_str, value_str, four_bytes_over];
    }

    function _dict_to_bytes(ifd_dict, ifd, ifd_offset) {
        var TIFF_HEADER_LENGTH = 8;
        var tag_count = Object.keys(ifd_dict).length;
        var entry_header = pack(">H", [tag_count]);
        var entries_length;
        if (["0th", "1st"].indexOf(ifd) > -1) {
            entries_length = 2 + tag_count * 12 + 4;
        } else {
            entries_length = 2 + tag_count * 12;
        }
        var entries = "";
        var values = "";
        var key;

        for (var key in ifd_dict) {
            if (typeof (key) == "string") {
                key = parseInt(key);
            }
            if ((ifd == "0th") && ([34665, 34853].indexOf(key) > -1)) {
                continue;
            } else if ((ifd == "Exif") && (key == 40965)) {
                continue;
            } else if ((ifd == "1st") && ([513, 514].indexOf(key) > -1)) {
                continue;
            }

            var raw_value = ifd_dict[key];
            var key_str = pack(">H", [key]);
            var value_type = TAGS[ifd][key]["type"];
            var type_str = pack(">H", [TYPES[value_type]]);

            if (typeof (raw_value) == "number") {
                raw_value = [raw_value];
            }
            var offset = TIFF_HEADER_LENGTH + entries_length + ifd_offset + values.length;
            var b = _value_to_bytes(raw_value, value_type, offset);
            var length_str = b[0];
            var value_str = b[1];
            var four_bytes_over = b[2];

            entries += key_str + type_str + length_str + value_str;
            values += four_bytes_over;
        }

        return [entry_header + entries, values];
    }



    function ExifReader(data) {
        var segments,
            app1;
        if (data.slice(0, 2) == "\xff\xd8") { // JPEG
            segments = splitIntoSegments(data);
            app1 = getExifSeg(segments);
            if (app1) {
                this.tiftag = app1.slice(10);
            } else {
                this.tiftag = null;
            }
        } else if (["\x49\x49", "\x4d\x4d"].indexOf(data.slice(0, 2)) > -1) { // TIFF
            this.tiftag = data;
        } else if (data.slice(0, 4) == "Exif") { // Exif
            this.tiftag = data.slice(6);
        } else {
            throw ("Given file is neither JPEG nor TIFF.");
        }
    }

    ExifReader.prototype = {
        get_ifd: function (pointer, ifd_name) {
            var ifd_dict = {};
            var tag_count = unpack(this.endian_mark + "H",
                this.tiftag.slice(pointer, pointer + 2))[0];
            var offset = pointer + 2;
            var t;
            if (["0th", "1st"].indexOf(ifd_name) > -1) {
                t = "Image";
            } else {
                t = ifd_name;
            }

            for (var x = 0; x < tag_count; x++) {
                pointer = offset + 12 * x;
                var tag = unpack(this.endian_mark + "H",
                    this.tiftag.slice(pointer, pointer + 2))[0];
                var value_type = unpack(this.endian_mark + "H",
                    this.tiftag.slice(pointer + 2, pointer + 4))[0];
                var value_num = unpack(this.endian_mark + "L",
                    this.tiftag.slice(pointer + 4, pointer + 8))[0];
                var value = this.tiftag.slice(pointer + 8, pointer + 12);

                var v_set = [value_type, value_num, value];
                if (tag in TAGS[t]) {
                    ifd_dict[tag] = this.convert_value(v_set);
                }
            }

            if (ifd_name == "0th") {
                pointer = offset + 12 * tag_count;
                ifd_dict["first_ifd_pointer"] = this.tiftag.slice(pointer, pointer + 4);
            }

            return ifd_dict;
        },

        convert_value: function (val) {
            var data = null;
            var t = val[0];
            var length = val[1];
            var value = val[2];
            var pointer;

            if (t == 1) { // BYTE
                if (length > 4) {
                    pointer = unpack(this.endian_mark + "L", value)[0];
                    data = unpack(this.endian_mark + nStr("B", length),
                        this.tiftag.slice(pointer, pointer + length));
                } else {
                    data = unpack(this.endian_mark + nStr("B", length), value.slice(0, length));
                }
            } else if (t == 2) { // ASCII
                if (length > 4) {
                    pointer = unpack(this.endian_mark + "L", value)[0];
                    data = this.tiftag.slice(pointer, pointer + length - 1);
                } else {
                    data = value.slice(0, length - 1);
                }
            } else if (t == 3) { // SHORT
                if (length > 2) {
                    pointer = unpack(this.endian_mark + "L", value)[0];
                    data = unpack(this.endian_mark + nStr("H", length),
                        this.tiftag.slice(pointer, pointer + length * 2));
                } else {
                    data = unpack(this.endian_mark + nStr("H", length),
                        value.slice(0, length * 2));
                }
            } else if (t == 4) { // LONG
                if (length > 1) {
                    pointer = unpack(this.endian_mark + "L", value)[0];
                    data = unpack(this.endian_mark + nStr("L", length),
                        this.tiftag.slice(pointer, pointer + length * 4));
                } else {
                    data = unpack(this.endian_mark + nStr("L", length),
                        value);
                }
            } else if (t == 5) { // RATIONAL
                pointer = unpack(this.endian_mark + "L", value)[0];
                if (length > 1) {
                    data = [];
                    for (var x = 0; x < length; x++) {
                        data.push([unpack(this.endian_mark + "L",
                                this.tiftag.slice(pointer + x * 8, pointer + 4 + x * 8))[0],
                                   unpack(this.endian_mark + "L",
                                this.tiftag.slice(pointer + 4 + x * 8, pointer + 8 + x * 8))[0]
                                   ]);
                    }
                } else {
                    data = [unpack(this.endian_mark + "L",
                            this.tiftag.slice(pointer, pointer + 4))[0],
                            unpack(this.endian_mark + "L",
                            this.tiftag.slice(pointer + 4, pointer + 8))[0]
                            ];
                }
            } else if (t == 7) { // UNDEFINED BYTES
                if (length > 4) {
                    pointer = unpack(this.endian_mark + "L", value)[0];
                    data = this.tiftag.slice(pointer, pointer + length);
                } else {
                    data = value.slice(0, length);
                }
            } else if (t == 10) { // SRATIONAL
                pointer = unpack(this.endian_mark + "L", value)[0];
                if (length > 1) {
                    data = [];
                    for (var x = 0; x < length; x++) {
                        data.push([unpack(this.endian_mark + "l",
                                this.tiftag.slice(pointer + x * 8, pointer + 4 + x * 8))[0],
                                   unpack(this.endian_mark + "l",
                                this.tiftag.slice(pointer + 4 + x * 8, pointer + 8 + x * 8))[0]
                                  ]);
                    }
                } else {
                    data = [unpack(this.endian_mark + "l",
                            this.tiftag.slice(pointer, pointer + 4))[0],
                            unpack(this.endian_mark + "l",
                            this.tiftag.slice(pointer + 4, pointer + 8))[0]
                           ];
                }
            } else {
                throw ("Exif might be wrong. Got incorrect value " +
                    "type to decode. type:" + t);
            }

            if ((data instanceof Array) && (data.length == 1)) {
                return data[0];
            } else {
                return data;
            }
        },
    };


    if (typeof window !== "undefined" && typeof window.btoa === "function") {
        var btoa = window.btoa;
    }
    if (typeof btoa === "undefined") {
        var btoa = function (input) {        var output = "";
            var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
            var i = 0;
            var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

            while (i < input.length) {

                chr1 = input.charCodeAt(i++);
                chr2 = input.charCodeAt(i++);
                chr3 = input.charCodeAt(i++);

                enc1 = chr1 >> 2;
                enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
                enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
                enc4 = chr3 & 63;

                if (isNaN(chr2)) {
                    enc3 = enc4 = 64;
                } else if (isNaN(chr3)) {
                    enc4 = 64;
                }

                output = output +
                keyStr.charAt(enc1) + keyStr.charAt(enc2) +
                keyStr.charAt(enc3) + keyStr.charAt(enc4);

            }

            return output;
        };
    }
    
    
    if (typeof window !== "undefined" && typeof window.atob === "function") {
        var atob = window.atob;
    }
    if (typeof atob === "undefined") {
        var atob = function (input) {
            var output = "";
            var chr1, chr2, chr3;
            var enc1, enc2, enc3, enc4;
            var i = 0;
            var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

            input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

            while (i < input.length) {

                enc1 = keyStr.indexOf(input.charAt(i++));
                enc2 = keyStr.indexOf(input.charAt(i++));
                enc3 = keyStr.indexOf(input.charAt(i++));
                enc4 = keyStr.indexOf(input.charAt(i++));

                chr1 = (enc1 << 2) | (enc2 >> 4);
                chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
                chr3 = ((enc3 & 3) << 6) | enc4;

                output = output + String.fromCharCode(chr1);

                if (enc3 != 64) {
                    output = output + String.fromCharCode(chr2);
                }
                if (enc4 != 64) {
                    output = output + String.fromCharCode(chr3);
                }

            }

            return output;
        };
    }


    function getImageSize(imageArray) {
        var segments = slice2Segments(imageArray);
        var seg,
            width,
            height,
            SOF = [192, 193, 194, 195, 197, 198, 199, 201, 202, 203, 205, 206, 207];

        for (var x = 0; x < segments.length; x++) {
            seg = segments[x];
            if (SOF.indexOf(seg[1]) >= 0) {
                height = seg[5] * 256 + seg[6];
                width = seg[7] * 256 + seg[8];
                break;
            }
        }
        return [width, height];
    }


    function pack(mark, array) {
        if (!(array instanceof Array)) {
            throw ("'pack' error. Got invalid type argument.");
        }
        if ((mark.length - 1) != array.length) {
            throw ("'pack' error. " + (mark.length - 1) + " marks, " + array.length + " elements.");
        }

        var littleEndian;
        if (mark[0] == "<") {
            littleEndian = true;
        } else if (mark[0] == ">") {
            littleEndian = false;
        } else {
            throw ("");
        }
        var packed = "";
        var p = 1;
        var val = null;
        var c = null;
        var valStr = null;

        while (c = mark[p]) {
            if (c.toLowerCase() == "b") {
                val = array[p - 1];
                if ((c == "b") && (val < 0)) {
                    val += 0x100;
                }
                if ((val > 0xff) || (val < 0)) {
                    throw ("'pack' error.");
                } else {
                    valStr = String.fromCharCode(val);
                }
            } else if (c == "H") {
                val = array[p - 1];
                if ((val > 0xffff) || (val < 0)) {
                    throw ("'pack' error.");
                } else {
                    valStr = String.fromCharCode(Math.floor((val % 0x10000) / 0x100)) +
                        String.fromCharCode(val % 0x100);
                    if (littleEndian) {
                        valStr = valStr.split("").reverse().join("");
                    }
                }
            } else if (c.toLowerCase() == "l") {
                val = array[p - 1];
                if ((c == "l") && (val < 0)) {
                    val += 0x100000000;
                }
                if ((val > 0xffffffff) || (val < 0)) {
                    throw ("'pack' error.");
                } else {
                    valStr = String.fromCharCode(Math.floor(val / 0x1000000)) +
                        String.fromCharCode(Math.floor((val % 0x1000000) / 0x10000)) +
                        String.fromCharCode(Math.floor((val % 0x10000) / 0x100)) +
                        String.fromCharCode(val % 0x100);
                    if (littleEndian) {
                        valStr = valStr.split("").reverse().join("");
                    }
                }
            } else {
                throw ("'pack' error.");
            }

            packed += valStr;
            p += 1;
        }

        return packed;
    }

    function unpack(mark, str) {
        if (typeof (str) != "string") {
            throw ("'unpack' error. Got invalid type argument.");
        }
        var l = 0;
        for (var markPointer = 1; markPointer < mark.length; markPointer++) {
            if (mark[markPointer].toLowerCase() == "b") {
                l += 1;
            } else if (mark[markPointer].toLowerCase() == "h") {
                l += 2;
            } else if (mark[markPointer].toLowerCase() == "l") {
                l += 4;
            } else {
                throw ("'unpack' error. Got invalid mark.");
            }
        }

        if (l != str.length) {
            throw ("'unpack' error. Mismatch between symbol and string length. " + l + ":" + str.length);
        }

        var littleEndian;
        if (mark[0] == "<") {
            littleEndian = true;
        } else if (mark[0] == ">") {
            littleEndian = false;
        } else {
            throw ("'unpack' error.");
        }
        var unpacked = [];
        var strPointer = 0;
        var p = 1;
        var val = null;
        var c = null;
        var length = null;
        var sliced = "";

        while (c = mark[p]) {
            if (c.toLowerCase() == "b") {
                length = 1;
                sliced = str.slice(strPointer, strPointer + length);
                val = sliced.charCodeAt(0);
                if ((c == "b") && (val >= 0x80)) {
                    val -= 0x100;
                }
            } else if (c == "H") {
                length = 2;
                sliced = str.slice(strPointer, strPointer + length);
                if (littleEndian) {
                    sliced = sliced.split("").reverse().join("");
                }
                val = sliced.charCodeAt(0) * 0x100 +
                    sliced.charCodeAt(1);
            } else if (c.toLowerCase() == "l") {
                length = 4;
                sliced = str.slice(strPointer, strPointer + length);
                if (littleEndian) {
                    sliced = sliced.split("").reverse().join("");
                }
                val = sliced.charCodeAt(0) * 0x1000000 +
                    sliced.charCodeAt(1) * 0x10000 +
                    sliced.charCodeAt(2) * 0x100 +
                    sliced.charCodeAt(3);
                if ((c == "l") && (val >= 0x80000000)) {
                    val -= 0x100000000;
                }
            } else {
                throw ("'unpack' error. " + c);
            }

            unpacked.push(val);
            strPointer += length;
            p += 1;
        }

        return unpacked;
    }

    function nStr(ch, num) {
        var str = "";
        for (var i = 0; i < num; i++) {
            str += ch;
        }
        return str;
    }

    function splitIntoSegments(data) {
        if (data.slice(0, 2) != "\xff\xd8") {
            throw ("Given data isn't JPEG.");
        }

        var head = 2;
        var segments = ["\xff\xd8"];
        while (true) {
            if (data.slice(head, head + 2) == "\xff\xda") {
                segments.push(data.slice(head));
                break;
            } else {
                var length = unpack(">H", data.slice(head + 2, head + 4))[0];
                var endPoint = head + length + 2;
                segments.push(data.slice(head, endPoint));
                head = endPoint;
            }

            if (head >= data.length) {
                throw ("Wrong JPEG data.");
            }
        }
        return segments;
    }


    function getExifSeg(segments) {
        var seg;
        for (var i = 0; i < segments.length; i++) {
            seg = segments[i];
            if (seg.slice(0, 2) == "\xff\xe1" &&
                   seg.slice(4, 10) == "Exif\x00\x00") {
                return seg;
            }
        }
        return null;
    }


    function mergeSegments(segments, exif) {
        
        if (segments[1].slice(0, 2) == "\xff\xe0" &&
            (segments[2].slice(0, 2) == "\xff\xe1" &&
             segments[2].slice(4, 10) == "Exif\x00\x00")) {
            if (exif) {
                segments[2] = exif;
                segments = ["\xff\xd8"].concat(segments.slice(2));
            } else if (exif == null) {
                segments = segments.slice(0, 2).concat(segments.slice(3));
            } else {
                segments = segments.slice(0).concat(segments.slice(2));
            }
        } else if (segments[1].slice(0, 2) == "\xff\xe0") {
            if (exif) {
                segments[1] = exif;
            }
        } else if (segments[1].slice(0, 2) == "\xff\xe1" &&
                   segments[1].slice(4, 10) == "Exif\x00\x00") {
            if (exif) {
                segments[1] = exif;
            } else if (exif == null) {
                segments = segments.slice(0).concat(segments.slice(2));
            }
        } else {
            if (exif) {
                segments = [segments[0], exif].concat(segments.slice(1));
            }
        }
        
        return segments.join("");
    }


    function toHex(str) {
        var hexStr = "";
        for (var i = 0; i < str.length; i++) {
            var h = str.charCodeAt(i);
            var hex = ((h < 10) ? "0" : "") + h.toString(16);
            hexStr += hex + " ";
        }
        return hexStr;
    }


    var TYPES = {
        "Byte": 1,
        "Ascii": 2,
        "Short": 3,
        "Long": 4,
        "Rational": 5,
        "Undefined": 7,
        "SLong": 9,
        "SRational": 10
    };


    var TAGS = {
        'Image': {
            11: {
                'name': 'ProcessingSoftware',
                'type': 'Ascii'
            },
            254: {
                'name': 'NewSubfileType',
                'type': 'Long'
            },
            255: {
                'name': 'SubfileType',
                'type': 'Short'
            },
            256: {
                'name': 'ImageWidth',
                'type': 'Long'
            },
            257: {
                'name': 'ImageLength',
                'type': 'Long'
            },
            258: {
                'name': 'BitsPerSample',
                'type': 'Short'
            },
            259: {
                'name': 'Compression',
                'type': 'Short'
            },
            262: {
                'name': 'PhotometricInterpretation',
                'type': 'Short'
            },
            263: {
                'name': 'Threshholding',
                'type': 'Short'
            },
            264: {
                'name': 'CellWidth',
                'type': 'Short'
            },
            265: {
                'name': 'CellLength',
                'type': 'Short'
            },
            266: {
                'name': 'FillOrder',
                'type': 'Short'
            },
            269: {
                'name': 'DocumentName',
                'type': 'Ascii'
            },
            270: {
                'name': 'ImageDescription',
                'type': 'Ascii'
            },
            271: {
                'name': 'Make',
                'type': 'Ascii'
            },
            272: {
                'name': 'Model',
                'type': 'Ascii'
            },
            273: {
                'name': 'StripOffsets',
                'type': 'Long'
            },
            274: {
                'name': 'Orientation',
                'type': 'Short'
            },
            277: {
                'name': 'SamplesPerPixel',
                'type': 'Short'
            },
            278: {
                'name': 'RowsPerStrip',
                'type': 'Long'
            },
            279: {
                'name': 'StripByteCounts',
                'type': 'Long'
            },
            282: {
                'name': 'XResolution',
                'type': 'Rational'
            },
            283: {
                'name': 'YResolution',
                'type': 'Rational'
            },
            284: {
                'name': 'PlanarConfiguration',
                'type': 'Short'
            },
            290: {
                'name': 'GrayResponseUnit',
                'type': 'Short'
            },
            291: {
                'name': 'GrayResponseCurve',
                'type': 'Short'
            },
            292: {
                'name': 'T4Options',
                'type': 'Long'
            },
            293: {
                'name': 'T6Options',
                'type': 'Long'
            },
            296: {
                'name': 'ResolutionUnit',
                'type': 'Short'
            },
            301: {
                'name': 'TransferFunction',
                'type': 'Short'
            },
            305: {
                'name': 'Software',
                'type': 'Ascii'
            },
            306: {
                'name': 'DateTime',
                'type': 'Ascii'
            },
            315: {
                'name': 'Artist',
                'type': 'Ascii'
            },
            316: {
                'name': 'HostComputer',
                'type': 'Ascii'
            },
            317: {
                'name': 'Predictor',
                'type': 'Short'
            },
            318: {
                'name': 'WhitePoint',
                'type': 'Rational'
            },
            319: {
                'name': 'PrimaryChromaticities',
                'type': 'Rational'
            },
            320: {
                'name': 'ColorMap',
                'type': 'Short'
            },
            321: {
                'name': 'HalftoneHints',
                'type': 'Short'
            },
            322: {
                'name': 'TileWidth',
                'type': 'Short'
            },
            323: {
                'name': 'TileLength',
                'type': 'Short'
            },
            324: {
                'name': 'TileOffsets',
                'type': 'Short'
            },
            325: {
                'name': 'TileByteCounts',
                'type': 'Short'
            },
            330: {
                'name': 'SubIFDs',
                'type': 'Long'
            },
            332: {
                'name': 'InkSet',
                'type': 'Short'
            },
            333: {
                'name': 'InkNames',
                'type': 'Ascii'
            },
            334: {
                'name': 'NumberOfInks',
                'type': 'Short'
            },
            336: {
                'name': 'DotRange',
                'type': 'Byte'
            },
            337: {
                'name': 'TargetPrinter',
                'type': 'Ascii'
            },
            338: {
                'name': 'ExtraSamples',
                'type': 'Short'
            },
            339: {
                'name': 'SampleFormat',
                'type': 'Short'
            },
            340: {
                'name': 'SMinSampleValue',
                'type': 'Short'
            },
            341: {
                'name': 'SMaxSampleValue',
                'type': 'Short'
            },
            342: {
                'name': 'TransferRange',
                'type': 'Short'
            },
            343: {
                'name': 'ClipPath',
                'type': 'Byte'
            },
            344: {
                'name': 'XClipPathUnits',
                'type': 'Long'
            },
            345: {
                'name': 'YClipPathUnits',
                'type': 'Long'
            },
            346: {
                'name': 'Indexed',
                'type': 'Short'
            },
            347: {
                'name': 'JPEGTables',
                'type': 'Undefined'
            },
            351: {
                'name': 'OPIProxy',
                'type': 'Short'
            },
            512: {
                'name': 'JPEGProc',
                'type': 'Long'
            },
            513: {
                'name': 'JPEGInterchangeFormat',
                'type': 'Long'
            },
            514: {
                'name': 'JPEGInterchangeFormatLength',
                'type': 'Long'
            },
            515: {
                'name': 'JPEGRestartInterval',
                'type': 'Short'
            },
            517: {
                'name': 'JPEGLosslessPredictors',
                'type': 'Short'
            },
            518: {
                'name': 'JPEGPointTransforms',
                'type': 'Short'
            },
            519: {
                'name': 'JPEGQTables',
                'type': 'Long'
            },
            520: {
                'name': 'JPEGDCTables',
                'type': 'Long'
            },
            521: {
                'name': 'JPEGACTables',
                'type': 'Long'
            },
            529: {
                'name': 'YCbCrCoefficients',
                'type': 'Rational'
            },
            530: {
                'name': 'YCbCrSubSampling',
                'type': 'Short'
            },
            531: {
                'name': 'YCbCrPositioning',
                'type': 'Short'
            },
            532: {
                'name': 'ReferenceBlackWhite',
                'type': 'Rational'
            },
            700: {
                'name': 'XMLPacket',
                'type': 'Byte'
            },
            18246: {
                'name': 'Rating',
                'type': 'Short'
            },
            18249: {
                'name': 'RatingPercent',
                'type': 'Short'
            },
            32781: {
                'name': 'ImageID',
                'type': 'Ascii'
            },
            33421: {
                'name': 'CFARepeatPatternDim',
                'type': 'Short'
            },
            33422: {
                'name': 'CFAPattern',
                'type': 'Byte'
            },
            33423: {
                'name': 'BatteryLevel',
                'type': 'Rational'
            },
            33432: {
                'name': 'Copyright',
                'type': 'Ascii'
            },
            33434: {
                'name': 'ExposureTime',
                'type': 'Rational'
            },
            34377: {
                'name': 'ImageResources',
                'type': 'Byte'
            },
            34665: {
                'name': 'ExifTag',
                'type': 'Long'
            },
            34675: {
                'name': 'InterColorProfile',
                'type': 'Undefined'
            },
            34853: {
                'name': 'GPSTag',
                'type': 'Long'
            },
            34857: {
                'name': 'Interlace',
                'type': 'Short'
            },
            34858: {
                'name': 'TimeZoneOffset',
                'type': 'Long'
            },
            34859: {
                'name': 'SelfTimerMode',
                'type': 'Short'
            },
            37387: {
                'name': 'FlashEnergy',
                'type': 'Rational'
            },
            37388: {
                'name': 'SpatialFrequencyResponse',
                'type': 'Undefined'
            },
            37389: {
                'name': 'Noise',
                'type': 'Undefined'
            },
            37390: {
                'name': 'FocalPlaneXResolution',
                'type': 'Rational'
            },
            37391: {
                'name': 'FocalPlaneYResolution',
                'type': 'Rational'
            },
            37392: {
                'name': 'FocalPlaneResolutionUnit',
                'type': 'Short'
            },
            37393: {
                'name': 'ImageNumber',
                'type': 'Long'
            },
            37394: {
                'name': 'SecurityClassification',
                'type': 'Ascii'
            },
            37395: {
                'name': 'ImageHistory',
                'type': 'Ascii'
            },
            37397: {
                'name': 'ExposureIndex',
                'type': 'Rational'
            },
            37398: {
                'name': 'TIFFEPStandardID',
                'type': 'Byte'
            },
            37399: {
                'name': 'SensingMethod',
                'type': 'Short'
            },
            40091: {
                'name': 'XPTitle',
                'type': 'Byte'
            },
            40092: {
                'name': 'XPComment',
                'type': 'Byte'
            },
            40093: {
                'name': 'XPAuthor',
                'type': 'Byte'
            },
            40094: {
                'name': 'XPKeywords',
                'type': 'Byte'
            },
            40095: {
                'name': 'XPSubject',
                'type': 'Byte'
            },
            50341: {
                'name': 'PrintImageMatching',
                'type': 'Undefined'
            },
            50706: {
                'name': 'DNGVersion',
                'type': 'Byte'
            },
            50707: {
                'name': 'DNGBackwardVersion',
                'type': 'Byte'
            },
            50708: {
                'name': 'UniqueCameraModel',
                'type': 'Ascii'
            },
            50709: {
                'name': 'LocalizedCameraModel',
                'type': 'Byte'
            },
            50710: {
                'name': 'CFAPlaneColor',
                'type': 'Byte'
            },
            50711: {
                'name': 'CFALayout',
                'type': 'Short'
            },
            50712: {
                'name': 'LinearizationTable',
                'type': 'Short'
            },
            50713: {
                'name': 'BlackLevelRepeatDim',
                'type': 'Short'
            },
            50714: {
                'name': 'BlackLevel',
                'type': 'Rational'
            },
            50715: {
                'name': 'BlackLevelDeltaH',
                'type': 'SRational'
            },
            50716: {
                'name': 'BlackLevelDeltaV',
                'type': 'SRational'
            },
            50717: {
                'name': 'WhiteLevel',
                'type': 'Short'
            },
            50718: {
                'name': 'DefaultScale',
                'type': 'Rational'
            },
            50719: {
                'name': 'DefaultCropOrigin',
                'type': 'Short'
            },
            50720: {
                'name': 'DefaultCropSize',
                'type': 'Short'
            },
            50721: {
                'name': 'ColorMatrix1',
                'type': 'SRational'
            },
            50722: {
                'name': 'ColorMatrix2',
                'type': 'SRational'
            },
            50723: {
                'name': 'CameraCalibration1',
                'type': 'SRational'
            },
            50724: {
                'name': 'CameraCalibration2',
                'type': 'SRational'
            },
            50725: {
                'name': 'ReductionMatrix1',
                'type': 'SRational'
            },
            50726: {
                'name': 'ReductionMatrix2',
                'type': 'SRational'
            },
            50727: {
                'name': 'AnalogBalance',
                'type': 'Rational'
            },
            50728: {
                'name': 'AsShotNeutral',
                'type': 'Short'
            },
            50729: {
                'name': 'AsShotWhiteXY',
                'type': 'Rational'
            },
            50730: {
                'name': 'BaselineExposure',
                'type': 'SRational'
            },
            50731: {
                'name': 'BaselineNoise',
                'type': 'Rational'
            },
            50732: {
                'name': 'BaselineSharpness',
                'type': 'Rational'
            },
            50733: {
                'name': 'BayerGreenSplit',
                'type': 'Long'
            },
            50734: {
                'name': 'LinearResponseLimit',
                'type': 'Rational'
            },
            50735: {
                'name': 'CameraSerialNumber',
                'type': 'Ascii'
            },
            50736: {
                'name': 'LensInfo',
                'type': 'Rational'
            },
            50737: {
                'name': 'ChromaBlurRadius',
                'type': 'Rational'
            },
            50738: {
                'name': 'AntiAliasStrength',
                'type': 'Rational'
            },
            50739: {
                'name': 'ShadowScale',
                'type': 'SRational'
            },
            50740: {
                'name': 'DNGPrivateData',
                'type': 'Byte'
            },
            50741: {
                'name': 'MakerNoteSafety',
                'type': 'Short'
            },
            50778: {
                'name': 'CalibrationIlluminant1',
                'type': 'Short'
            },
            50779: {
                'name': 'CalibrationIlluminant2',
                'type': 'Short'
            },
            50780: {
                'name': 'BestQualityScale',
                'type': 'Rational'
            },
            50781: {
                'name': 'RawDataUniqueID',
                'type': 'Byte'
            },
            50827: {
                'name': 'OriginalRawFileName',
                'type': 'Byte'
            },
            50828: {
                'name': 'OriginalRawFileData',
                'type': 'Undefined'
            },
            50829: {
                'name': 'ActiveArea',
                'type': 'Short'
            },
            50830: {
                'name': 'MaskedAreas',
                'type': 'Short'
            },
            50831: {
                'name': 'AsShotICCProfile',
                'type': 'Undefined'
            },
            50832: {
                'name': 'AsShotPreProfileMatrix',
                'type': 'SRational'
            },
            50833: {
                'name': 'CurrentICCProfile',
                'type': 'Undefined'
            },
            50834: {
                'name': 'CurrentPreProfileMatrix',
                'type': 'SRational'
            },
            50879: {
                'name': 'ColorimetricReference',
                'type': 'Short'
            },
            50931: {
                'name': 'CameraCalibrationSignature',
                'type': 'Byte'
            },
            50932: {
                'name': 'ProfileCalibrationSignature',
                'type': 'Byte'
            },
            50934: {
                'name': 'AsShotProfileName',
                'type': 'Byte'
            },
            50935: {
                'name': 'NoiseReductionApplied',
                'type': 'Rational'
            },
            50936: {
                'name': 'ProfileName',
                'type': 'Byte'
            },
            50937: {
                'name': 'ProfileHueSatMapDims',
                'type': 'Long'
            },
            50938: {
                'name': 'ProfileHueSatMapData1',
                'type': 'Float'
            },
            50939: {
                'name': 'ProfileHueSatMapData2',
                'type': 'Float'
            },
            50940: {
                'name': 'ProfileToneCurve',
                'type': 'Float'
            },
            50941: {
                'name': 'ProfileEmbedPolicy',
                'type': 'Long'
            },
            50942: {
                'name': 'ProfileCopyright',
                'type': 'Byte'
            },
            50964: {
                'name': 'ForwardMatrix1',
                'type': 'SRational'
            },
            50965: {
                'name': 'ForwardMatrix2',
                'type': 'SRational'
            },
            50966: {
                'name': 'PreviewApplicationName',
                'type': 'Byte'
            },
            50967: {
                'name': 'PreviewApplicationVersion',
                'type': 'Byte'
            },
            50968: {
                'name': 'PreviewSettingsName',
                'type': 'Byte'
            },
            50969: {
                'name': 'PreviewSettingsDigest',
                'type': 'Byte'
            },
            50970: {
                'name': 'PreviewColorSpace',
                'type': 'Long'
            },
            50971: {
                'name': 'PreviewDateTime',
                'type': 'Ascii'
            },
            50972: {
                'name': 'RawImageDigest',
                'type': 'Undefined'
            },
            50973: {
                'name': 'OriginalRawFileDigest',
                'type': 'Undefined'
            },
            50974: {
                'name': 'SubTileBlockSize',
                'type': 'Long'
            },
            50975: {
                'name': 'RowInterleaveFactor',
                'type': 'Long'
            },
            50981: {
                'name': 'ProfileLookTableDims',
                'type': 'Long'
            },
            50982: {
                'name': 'ProfileLookTableData',
                'type': 'Float'
            },
            51008: {
                'name': 'OpcodeList1',
                'type': 'Undefined'
            },
            51009: {
                'name': 'OpcodeList2',
                'type': 'Undefined'
            },
            51022: {
                'name': 'OpcodeList3',
                'type': 'Undefined'
            }
        },
        'Exif': {
            33434: {
                'name': 'ExposureTime',
                'type': 'Rational'
            },
            33437: {
                'name': 'FNumber',
                'type': 'Rational'
            },
            34850: {
                'name': 'ExposureProgram',
                'type': 'Short'
            },
            34852: {
                'name': 'SpectralSensitivity',
                'type': 'Ascii'
            },
            34855: {
                'name': 'ISOSpeedRatings',
                'type': 'Short'
            },
            34856: {
                'name': 'OECF',
                'type': 'Undefined'
            },
            34864: {
                'name': 'SensitivityType',
                'type': 'Short'
            },
            34865: {
                'name': 'StandardOutputSensitivity',
                'type': 'Long'
            },
            34866: {
                'name': 'RecommendedExposureIndex',
                'type': 'Long'
            },
            34867: {
                'name': 'ISOSpeed',
                'type': 'Long'
            },
            34868: {
                'name': 'ISOSpeedLatitudeyyy',
                'type': 'Long'
            },
            34869: {
                'name': 'ISOSpeedLatitudezzz',
                'type': 'Long'
            },
            36864: {
                'name': 'ExifVersion',
                'type': 'Undefined'
            },
            36867: {
                'name': 'DateTimeOriginal',
                'type': 'Ascii'
            },
            36868: {
                'name': 'DateTimeDigitized',
                'type': 'Ascii'
            },
            37121: {
                'name': 'ComponentsConfiguration',
                'type': 'Undefined'
            },
            37122: {
                'name': 'CompressedBitsPerPixel',
                'type': 'Rational'
            },
            37377: {
                'name': 'ShutterSpeedValue',
                'type': 'SRational'
            },
            37378: {
                'name': 'ApertureValue',
                'type': 'Rational'
            },
            37379: {
                'name': 'BrightnessValue',
                'type': 'SRational'
            },
            37380: {
                'name': 'ExposureBiasValue',
                'type': 'SRational'
            },
            37381: {
                'name': 'MaxApertureValue',
                'type': 'Rational'
            },
            37382: {
                'name': 'SubjectDistance',
                'type': 'Rational'
            },
            37383: {
                'name': 'MeteringMode',
                'type': 'Short'
            },
            37384: {
                'name': 'LightSource',
                'type': 'Short'
            },
            37385: {
                'name': 'Flash',
                'type': 'Short'
            },
            37386: {
                'name': 'FocalLength',
                'type': 'Rational'
            },
            37396: {
                'name': 'SubjectArea',
                'type': 'Short'
            },
            37500: {
                'name': 'MakerNote',
                'type': 'Undefined'
            },
            37510: {
                'name': 'UserComment',
                'type': 'Ascii'
            },
            37520: {
                'name': 'SubSecTime',
                'type': 'Ascii'
            },
            37521: {
                'name': 'SubSecTimeOriginal',
                'type': 'Ascii'
            },
            37522: {
                'name': 'SubSecTimeDigitized',
                'type': 'Ascii'
            },
            40960: {
                'name': 'FlashpixVersion',
                'type': 'Undefined'
            },
            40961: {
                'name': 'ColorSpace',
                'type': 'Short'
            },
            40962: {
                'name': 'PixelXDimension',
                'type': 'Long'
            },
            40963: {
                'name': 'PixelYDimension',
                'type': 'Long'
            },
            40964: {
                'name': 'RelatedSoundFile',
                'type': 'Ascii'
            },
            40965: {
                'name': 'InteroperabilityTag',
                'type': 'Long'
            },
            41483: {
                'name': 'FlashEnergy',
                'type': 'Rational'
            },
            41484: {
                'name': 'SpatialFrequencyResponse',
                'type': 'Undefined'
            },
            41486: {
                'name': 'FocalPlaneXResolution',
                'type': 'Rational'
            },
            41487: {
                'name': 'FocalPlaneYResolution',
                'type': 'Rational'
            },
            41488: {
                'name': 'FocalPlaneResolutionUnit',
                'type': 'Short'
            },
            41492: {
                'name': 'SubjectLocation',
                'type': 'Short'
            },
            41493: {
                'name': 'ExposureIndex',
                'type': 'Rational'
            },
            41495: {
                'name': 'SensingMethod',
                'type': 'Short'
            },
            41728: {
                'name': 'FileSource',
                'type': 'Undefined'
            },
            41729: {
                'name': 'SceneType',
                'type': 'Undefined'
            },
            41730: {
                'name': 'CFAPattern',
                'type': 'Undefined'
            },
            41985: {
                'name': 'CustomRendered',
                'type': 'Short'
            },
            41986: {
                'name': 'ExposureMode',
                'type': 'Short'
            },
            41987: {
                'name': 'WhiteBalance',
                'type': 'Short'
            },
            41988: {
                'name': 'DigitalZoomRatio',
                'type': 'Rational'
            },
            41989: {
                'name': 'FocalLengthIn35mmFilm',
                'type': 'Short'
            },
            41990: {
                'name': 'SceneCaptureType',
                'type': 'Short'
            },
            41991: {
                'name': 'GainControl',
                'type': 'Short'
            },
            41992: {
                'name': 'Contrast',
                'type': 'Short'
            },
            41993: {
                'name': 'Saturation',
                'type': 'Short'
            },
            41994: {
                'name': 'Sharpness',
                'type': 'Short'
            },
            41995: {
                'name': 'DeviceSettingDescription',
                'type': 'Undefined'
            },
            41996: {
                'name': 'SubjectDistanceRange',
                'type': 'Short'
            },
            42016: {
                'name': 'ImageUniqueID',
                'type': 'Ascii'
            },
            42032: {
                'name': 'CameraOwnerName',
                'type': 'Ascii'
            },
            42033: {
                'name': 'BodySerialNumber',
                'type': 'Ascii'
            },
            42034: {
                'name': 'LensSpecification',
                'type': 'Rational'
            },
            42035: {
                'name': 'LensMake',
                'type': 'Ascii'
            },
            42036: {
                'name': 'LensModel',
                'type': 'Ascii'
            },
            42037: {
                'name': 'LensSerialNumber',
                'type': 'Ascii'
            },
            42240: {
                'name': 'Gamma',
                'type': 'Rational'
            }
        },
        'GPS': {
            0: {
                'name': 'GPSVersionID',
                'type': 'Byte'
            },
            1: {
                'name': 'GPSLatitudeRef',
                'type': 'Ascii'
            },
            2: {
                'name': 'GPSLatitude',
                'type': 'Rational'
            },
            3: {
                'name': 'GPSLongitudeRef',
                'type': 'Ascii'
            },
            4: {
                'name': 'GPSLongitude',
                'type': 'Rational'
            },
            5: {
                'name': 'GPSAltitudeRef',
                'type': 'Byte'
            },
            6: {
                'name': 'GPSAltitude',
                'type': 'Rational'
            },
            7: {
                'name': 'GPSTimeStamp',
                'type': 'Rational'
            },
            8: {
                'name': 'GPSSatellites',
                'type': 'Ascii'
            },
            9: {
                'name': 'GPSStatus',
                'type': 'Ascii'
            },
            10: {
                'name': 'GPSMeasureMode',
                'type': 'Ascii'
            },
            11: {
                'name': 'GPSDOP',
                'type': 'Rational'
            },
            12: {
                'name': 'GPSSpeedRef',
                'type': 'Ascii'
            },
            13: {
                'name': 'GPSSpeed',
                'type': 'Rational'
            },
            14: {
                'name': 'GPSTrackRef',
                'type': 'Ascii'
            },
            15: {
                'name': 'GPSTrack',
                'type': 'Rational'
            },
            16: {
                'name': 'GPSImgDirectionRef',
                'type': 'Ascii'
            },
            17: {
                'name': 'GPSImgDirection',
                'type': 'Rational'
            },
            18: {
                'name': 'GPSMapDatum',
                'type': 'Ascii'
            },
            19: {
                'name': 'GPSDestLatitudeRef',
                'type': 'Ascii'
            },
            20: {
                'name': 'GPSDestLatitude',
                'type': 'Rational'
            },
            21: {
                'name': 'GPSDestLongitudeRef',
                'type': 'Ascii'
            },
            22: {
                'name': 'GPSDestLongitude',
                'type': 'Rational'
            },
            23: {
                'name': 'GPSDestBearingRef',
                'type': 'Ascii'
            },
            24: {
                'name': 'GPSDestBearing',
                'type': 'Rational'
            },
            25: {
                'name': 'GPSDestDistanceRef',
                'type': 'Ascii'
            },
            26: {
                'name': 'GPSDestDistance',
                'type': 'Rational'
            },
            27: {
                'name': 'GPSProcessingMethod',
                'type': 'Undefined'
            },
            28: {
                'name': 'GPSAreaInformation',
                'type': 'Undefined'
            },
            29: {
                'name': 'GPSDateStamp',
                'type': 'Ascii'
            },
            30: {
                'name': 'GPSDifferential',
                'type': 'Short'
            },
            31: {
                'name': 'GPSHPositioningError',
                'type': 'Rational'
            }
        },
        'Interop': {
            1: {
                'name': 'InteroperabilityIndex',
                'type': 'Ascii'
            }
        },
    };
    TAGS["0th"] = TAGS["Image"];
    TAGS["1st"] = TAGS["Image"];
    that.TAGS = TAGS;

    
    that.ImageIFD = {
        ProcessingSoftware:11,
        NewSubfileType:254,
        SubfileType:255,
        ImageWidth:256,
        ImageLength:257,
        BitsPerSample:258,
        Compression:259,
        PhotometricInterpretation:262,
        Threshholding:263,
        CellWidth:264,
        CellLength:265,
        FillOrder:266,
        DocumentName:269,
        ImageDescription:270,
        Make:271,
        Model:272,
        StripOffsets:273,
        Orientation:274,
        SamplesPerPixel:277,
        RowsPerStrip:278,
        StripByteCounts:279,
        XResolution:282,
        YResolution:283,
        PlanarConfiguration:284,
        GrayResponseUnit:290,
        GrayResponseCurve:291,
        T4Options:292,
        T6Options:293,
        ResolutionUnit:296,
        TransferFunction:301,
        Software:305,
        DateTime:306,
        Artist:315,
        HostComputer:316,
        Predictor:317,
        WhitePoint:318,
        PrimaryChromaticities:319,
        ColorMap:320,
        HalftoneHints:321,
        TileWidth:322,
        TileLength:323,
        TileOffsets:324,
        TileByteCounts:325,
        SubIFDs:330,
        InkSet:332,
        InkNames:333,
        NumberOfInks:334,
        DotRange:336,
        TargetPrinter:337,
        ExtraSamples:338,
        SampleFormat:339,
        SMinSampleValue:340,
        SMaxSampleValue:341,
        TransferRange:342,
        ClipPath:343,
        XClipPathUnits:344,
        YClipPathUnits:345,
        Indexed:346,
        JPEGTables:347,
        OPIProxy:351,
        JPEGProc:512,
        JPEGInterchangeFormat:513,
        JPEGInterchangeFormatLength:514,
        JPEGRestartInterval:515,
        JPEGLosslessPredictors:517,
        JPEGPointTransforms:518,
        JPEGQTables:519,
        JPEGDCTables:520,
        JPEGACTables:521,
        YCbCrCoefficients:529,
        YCbCrSubSampling:530,
        YCbCrPositioning:531,
        ReferenceBlackWhite:532,
        XMLPacket:700,
        Rating:18246,
        RatingPercent:18249,
        ImageID:32781,
        CFARepeatPatternDim:33421,
        CFAPattern:33422,
        BatteryLevel:33423,
        Copyright:33432,
        ExposureTime:33434,
        ImageResources:34377,
        ExifTag:34665,
        InterColorProfile:34675,
        GPSTag:34853,
        Interlace:34857,
        TimeZoneOffset:34858,
        SelfTimerMode:34859,
        FlashEnergy:37387,
        SpatialFrequencyResponse:37388,
        Noise:37389,
        FocalPlaneXResolution:37390,
        FocalPlaneYResolution:37391,
        FocalPlaneResolutionUnit:37392,
        ImageNumber:37393,
        SecurityClassification:37394,
        ImageHistory:37395,
        ExposureIndex:37397,
        TIFFEPStandardID:37398,
        SensingMethod:37399,
        XPTitle:40091,
        XPComment:40092,
        XPAuthor:40093,
        XPKeywords:40094,
        XPSubject:40095,
        PrintImageMatching:50341,
        DNGVersion:50706,
        DNGBackwardVersion:50707,
        UniqueCameraModel:50708,
        LocalizedCameraModel:50709,
        CFAPlaneColor:50710,
        CFALayout:50711,
        LinearizationTable:50712,
        BlackLevelRepeatDim:50713,
        BlackLevel:50714,
        BlackLevelDeltaH:50715,
        BlackLevelDeltaV:50716,
        WhiteLevel:50717,
        DefaultScale:50718,
        DefaultCropOrigin:50719,
        DefaultCropSize:50720,
        ColorMatrix1:50721,
        ColorMatrix2:50722,
        CameraCalibration1:50723,
        CameraCalibration2:50724,
        ReductionMatrix1:50725,
        ReductionMatrix2:50726,
        AnalogBalance:50727,
        AsShotNeutral:50728,
        AsShotWhiteXY:50729,
        BaselineExposure:50730,
        BaselineNoise:50731,
        BaselineSharpness:50732,
        BayerGreenSplit:50733,
        LinearResponseLimit:50734,
        CameraSerialNumber:50735,
        LensInfo:50736,
        ChromaBlurRadius:50737,
        AntiAliasStrength:50738,
        ShadowScale:50739,
        DNGPrivateData:50740,
        MakerNoteSafety:50741,
        CalibrationIlluminant1:50778,
        CalibrationIlluminant2:50779,
        BestQualityScale:50780,
        RawDataUniqueID:50781,
        OriginalRawFileName:50827,
        OriginalRawFileData:50828,
        ActiveArea:50829,
        MaskedAreas:50830,
        AsShotICCProfile:50831,
        AsShotPreProfileMatrix:50832,
        CurrentICCProfile:50833,
        CurrentPreProfileMatrix:50834,
        ColorimetricReference:50879,
        CameraCalibrationSignature:50931,
        ProfileCalibrationSignature:50932,
        AsShotProfileName:50934,
        NoiseReductionApplied:50935,
        ProfileName:50936,
        ProfileHueSatMapDims:50937,
        ProfileHueSatMapData1:50938,
        ProfileHueSatMapData2:50939,
        ProfileToneCurve:50940,
        ProfileEmbedPolicy:50941,
        ProfileCopyright:50942,
        ForwardMatrix1:50964,
        ForwardMatrix2:50965,
        PreviewApplicationName:50966,
        PreviewApplicationVersion:50967,
        PreviewSettingsName:50968,
        PreviewSettingsDigest:50969,
        PreviewColorSpace:50970,
        PreviewDateTime:50971,
        RawImageDigest:50972,
        OriginalRawFileDigest:50973,
        SubTileBlockSize:50974,
        RowInterleaveFactor:50975,
        ProfileLookTableDims:50981,
        ProfileLookTableData:50982,
        OpcodeList1:51008,
        OpcodeList2:51009,
        OpcodeList3:51022,
        NoiseProfile:51041,
    };

    
    that.ExifIFD = {
        ExposureTime:33434,
        FNumber:33437,
        ExposureProgram:34850,
        SpectralSensitivity:34852,
        ISOSpeedRatings:34855,
        OECF:34856,
        SensitivityType:34864,
        StandardOutputSensitivity:34865,
        RecommendedExposureIndex:34866,
        ISOSpeed:34867,
        ISOSpeedLatitudeyyy:34868,
        ISOSpeedLatitudezzz:34869,
        ExifVersion:36864,
        DateTimeOriginal:36867,
        DateTimeDigitized:36868,
        ComponentsConfiguration:37121,
        CompressedBitsPerPixel:37122,
        ShutterSpeedValue:37377,
        ApertureValue:37378,
        BrightnessValue:37379,
        ExposureBiasValue:37380,
        MaxApertureValue:37381,
        SubjectDistance:37382,
        MeteringMode:37383,
        LightSource:37384,
        Flash:37385,
        FocalLength:37386,
        SubjectArea:37396,
        MakerNote:37500,
        UserComment:37510,
        SubSecTime:37520,
        SubSecTimeOriginal:37521,
        SubSecTimeDigitized:37522,
        FlashpixVersion:40960,
        ColorSpace:40961,
        PixelXDimension:40962,
        PixelYDimension:40963,
        RelatedSoundFile:40964,
        InteroperabilityTag:40965,
        FlashEnergy:41483,
        SpatialFrequencyResponse:41484,
        FocalPlaneXResolution:41486,
        FocalPlaneYResolution:41487,
        FocalPlaneResolutionUnit:41488,
        SubjectLocation:41492,
        ExposureIndex:41493,
        SensingMethod:41495,
        FileSource:41728,
        SceneType:41729,
        CFAPattern:41730,
        CustomRendered:41985,
        ExposureMode:41986,
        WhiteBalance:41987,
        DigitalZoomRatio:41988,
        FocalLengthIn35mmFilm:41989,
        SceneCaptureType:41990,
        GainControl:41991,
        Contrast:41992,
        Saturation:41993,
        Sharpness:41994,
        DeviceSettingDescription:41995,
        SubjectDistanceRange:41996,
        ImageUniqueID:42016,
        CameraOwnerName:42032,
        BodySerialNumber:42033,
        LensSpecification:42034,
        LensMake:42035,
        LensModel:42036,
        LensSerialNumber:42037,
        Gamma:42240,
    };


    that.GPSIFD = {
        GPSVersionID:0,
        GPSLatitudeRef:1,
        GPSLatitude:2,
        GPSLongitudeRef:3,
        GPSLongitude:4,
        GPSAltitudeRef:5,
        GPSAltitude:6,
        GPSTimeStamp:7,
        GPSSatellites:8,
        GPSStatus:9,
        GPSMeasureMode:10,
        GPSDOP:11,
        GPSSpeedRef:12,
        GPSSpeed:13,
        GPSTrackRef:14,
        GPSTrack:15,
        GPSImgDirectionRef:16,
        GPSImgDirection:17,
        GPSMapDatum:18,
        GPSDestLatitudeRef:19,
        GPSDestLatitude:20,
        GPSDestLongitudeRef:21,
        GPSDestLongitude:22,
        GPSDestBearingRef:23,
        GPSDestBearing:24,
        GPSDestDistanceRef:25,
        GPSDestDistance:26,
        GPSProcessingMethod:27,
        GPSAreaInformation:28,
        GPSDateStamp:29,
        GPSDifferential:30,
        GPSHPositioningError:31,
    };


    that.InteropIFD = {
        InteroperabilityIndex:1,
    };

    that.GPSHelper = {
        degToDmsRational:function (degFloat) {
            var minFloat = degFloat % 1 * 60;
            var secFloat = minFloat % 1 * 60;
            var deg = Math.floor(degFloat);
            var min = Math.floor(minFloat);
            var sec = Math.round(secFloat * 100);

            return [[deg, 1], [min, 1], [sec, 100]];
        }
    };
    
    
    if (typeof exports !== 'undefined') {
        if (typeof module !== 'undefined' && module.exports) {
            exports = module.exports = that;
        }
        exports.piexif = that;
    } else {
        window.piexif = that;
    }

})();
/**!
 * KvSortable
 * @author	RubaXa   <trash@rubaxa.org>
 * @license MIT
 *
 * Changed kvsortable plugin naming to prevent conflict with JQuery UI Sortable
 * @author Kartik Visweswaran
 */

(function kvsortableModule(factory) {
	"use strict";

	if (typeof define === "function" && define.amd) {
		define(factory);
	}
	else if (typeof module != "undefined" && typeof module.exports != "undefined") {
		module.exports = factory();
	}
	else {
		/* jshint sub:true */
		window["KvSortable"] = factory();
	}
})(function kvsortableFactory() {
	"use strict";

	if (typeof window === "undefined" || !window.document) {
		return function kvsortableError() {
			throw new Error("KvSortable.js requires a window with a document");
		};
	}

	var dragEl,
		parentEl,
		ghostEl,
		cloneEl,
		rootEl,
		nextEl,
		lastDownEl,

		scrollEl,
		scrollParentEl,
		scrollCustomFn,

		lastEl,
		lastCSS,
		lastParentCSS,

		oldIndex,
		newIndex,

		activeGroup,
		putKvSortable,

		autoScroll = {},

		tapEvt,
		touchEvt,

		moved,

		/** @const */
		R_SPACE = /\s+/g,
		R_FLOAT = /left|right|inline/,

		expando = 'KvSortable' + (new Date).getTime(),

		win = window,
		document = win.document,
		parseInt = win.parseInt,
		setTimeout = win.setTimeout,

		$ = win.jQuery || win.Zepto,
		Polymer = win.Polymer,

		captureMode = false,
		passiveMode = false,

		supportDraggable = ('draggable' in document.createElement('div')),
		supportCssPointerEvents = (function (el) {
			// false when IE11
			if (!!navigator.userAgent.match(/(?:Trident.*rv[ :]?11\.|msie)/i)) {
				return false;
			}
			el = document.createElement('x');
			el.style.cssText = 'pointer-events:auto';
			return el.style.pointerEvents === 'auto';
		})(),

		_silent = false,

		abs = Math.abs,
		min = Math.min,

		savedInputChecked = [],
		touchDragOverListeners = [],

		_autoScroll = _throttle(function (/**Event*/evt, /**Object*/options, /**HTMLElement*/rootEl) {
			// Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
			if (rootEl && options.scroll) {
				var _this = rootEl[expando],
					el,
					rect,
					sens = options.scrollSensitivity,
					speed = options.scrollSpeed,

					x = evt.clientX,
					y = evt.clientY,

					winWidth = window.innerWidth,
					winHeight = window.innerHeight,

					vx,
					vy,

					scrollOffsetX,
					scrollOffsetY
				;

				// Delect scrollEl
				if (scrollParentEl !== rootEl) {
					scrollEl = options.scroll;
					scrollParentEl = rootEl;
					scrollCustomFn = options.scrollFn;

					if (scrollEl === true) {
						scrollEl = rootEl;

						do {
							if ((scrollEl.offsetWidth < scrollEl.scrollWidth) ||
								(scrollEl.offsetHeight < scrollEl.scrollHeight)
							) {
								break;
							}
							/* jshint boss:true */
						} while (scrollEl = scrollEl.parentNode);
					}
				}

				if (scrollEl) {
					el = scrollEl;
					rect = scrollEl.getBoundingClientRect();
					vx = (abs(rect.right - x) <= sens) - (abs(rect.left - x) <= sens);
					vy = (abs(rect.bottom - y) <= sens) - (abs(rect.top - y) <= sens);
				}


				if (!(vx || vy)) {
					vx = (winWidth - x <= sens) - (x <= sens);
					vy = (winHeight - y <= sens) - (y <= sens);

					/* jshint expr:true */
					(vx || vy) && (el = win);
				}


				if (autoScroll.vx !== vx || autoScroll.vy !== vy || autoScroll.el !== el) {
					autoScroll.el = el;
					autoScroll.vx = vx;
					autoScroll.vy = vy;

					clearInterval(autoScroll.pid);

					if (el) {
						autoScroll.pid = setInterval(function () {
							scrollOffsetY = vy ? vy * speed : 0;
							scrollOffsetX = vx ? vx * speed : 0;

							if ('function' === typeof(scrollCustomFn)) {
								return scrollCustomFn.call(_this, scrollOffsetX, scrollOffsetY, evt);
							}

							if (el === win) {
								win.scrollTo(win.pageXOffset + scrollOffsetX, win.pageYOffset + scrollOffsetY);
							} else {
								el.scrollTop += scrollOffsetY;
								el.scrollLeft += scrollOffsetX;
							}
						}, 24);
					}
				}
			}
		}, 30),

		_prepareGroup = function (options) {
			function toFn(value, pull) {
				if (value === void 0 || value === true) {
					value = group.name;
				}

				if (typeof value === 'function') {
					return value;
				} else {
					return function (to, from) {
						var fromGroup = from.options.group.name;

						return pull
							? value
							: value && (value.join
								? value.indexOf(fromGroup) > -1
								: (fromGroup == value)
							);
					};
				}
			}

			var group = {};
			var originalGroup = options.group;

			if (!originalGroup || typeof originalGroup != 'object') {
				originalGroup = {name: originalGroup};
			}

			group.name = originalGroup.name;
			group.checkPull = toFn(originalGroup.pull, true);
			group.checkPut = toFn(originalGroup.put);
			group.revertClone = originalGroup.revertClone;

			options.group = group;
		}
	;

	// Detect support a passive mode
	try {
		window.addEventListener('test', null, Object.defineProperty({}, 'passive', {
			get: function () {
				// `false`, because everything starts to work incorrectly and instead of d'n'd,
				// begins the page has scrolled.
				passiveMode = false;
				captureMode = {
					capture: false,
					passive: passiveMode
				};
			}
		}));
	} catch (err) {}

	/**
	 * @class  KvSortable
	 * @param  {HTMLElement}  el
	 * @param  {Object}       [options]
	 */
	function KvSortable(el, options) {
		if (!(el && el.nodeType && el.nodeType === 1)) {
			throw 'KvSortable: `el` must be HTMLElement, and not ' + {}.toString.call(el);
		}

		this.el = el; // root element
		this.options = options = _extend({}, options);


		// Export instance
		el[expando] = this;

		// Default options
		var defaults = {
			group: Math.random(),
			sort: true,
			disabled: false,
			store: null,
			handle: null,
			scroll: true,
			scrollSensitivity: 30,
			scrollSpeed: 10,
			draggable: /[uo]l/i.test(el.nodeName) ? 'li' : '>*',
			ghostClass: 'kvsortable-ghost',
			chosenClass: 'kvsortable-chosen',
			dragClass: 'kvsortable-drag',
			ignore: 'a, img',
			filter: null,
			preventOnFilter: true,
			animation: 0,
			setData: function (dataTransfer, dragEl) {
				dataTransfer.setData('Text', dragEl.textContent);
			},
			dropBubble: false,
			dragoverBubble: false,
			dataIdAttr: 'data-id',
			delay: 0,
			forceFallback: false,
			fallbackClass: 'kvsortable-fallback',
			fallbackOnBody: false,
			fallbackTolerance: 0,
			fallbackOffset: {x: 0, y: 0},
			supportPointer: KvSortable.supportPointer !== false
		};


		// Set default options
		for (var name in defaults) {
			!(name in options) && (options[name] = defaults[name]);
		}

		_prepareGroup(options);

		// Bind all private methods
		for (var fn in this) {
			if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
				this[fn] = this[fn].bind(this);
			}
		}

		// Setup drag mode
		this.nativeDraggable = options.forceFallback ? false : supportDraggable;

		// Bind events
		_on(el, 'mousedown', this._onTapStart);
		_on(el, 'touchstart', this._onTapStart);
		options.supportPointer && _on(el, 'pointerdown', this._onTapStart);

		if (this.nativeDraggable) {
			_on(el, 'dragover', this);
			_on(el, 'dragenter', this);
		}

		touchDragOverListeners.push(this._onDragOver);

		// Restore sorting
		options.store && this.sort(options.store.get(this));
	}


	KvSortable.prototype = /** @lends KvSortable.prototype */ {
		constructor: KvSortable,

		_onTapStart: function (/** Event|TouchEvent */evt) {
			var _this = this,
				el = this.el,
				options = this.options,
				preventOnFilter = options.preventOnFilter,
				type = evt.type,
				touch = evt.touches && evt.touches[0],
				target = (touch || evt).target,
				originalTarget = evt.target.shadowRoot && (evt.path && evt.path[0]) || target,
				filter = options.filter,
				startIndex;

			_saveInputCheckedState(el);


			// Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.
			if (dragEl) {
				return;
			}

			if (/mousedown|pointerdown/.test(type) && evt.button !== 0 || options.disabled) {
				return; // only left button or enabled
			}

			// cancel dnd if original target is content editable
			if (originalTarget.isContentEditable) {
				return;
			}

			target = _closest(target, options.draggable, el);

			if (!target) {
				return;
			}

			if (lastDownEl === target) {
				// Ignoring duplicate `down`
				return;
			}

			// Get the index of the dragged element within its parent
			startIndex = _index(target, options.draggable);

			// Check filter
			if (typeof filter === 'function') {
				if (filter.call(this, evt, target, this)) {
					_dispatchEvent(_this, originalTarget, 'filter', target, el, el, startIndex);
					preventOnFilter && evt.preventDefault();
					return; // cancel dnd
				}
			}
			else if (filter) {
				filter = filter.split(',').some(function (criteria) {
					criteria = _closest(originalTarget, criteria.trim(), el);

					if (criteria) {
						_dispatchEvent(_this, criteria, 'filter', target, el, el, startIndex);
						return true;
					}
				});

				if (filter) {
					preventOnFilter && evt.preventDefault();
					return; // cancel dnd
				}
			}

			if (options.handle && !_closest(originalTarget, options.handle, el)) {
				return;
			}

			// Prepare `dragstart`
			this._prepareDragStart(evt, touch, target, startIndex);
		},

		_prepareDragStart: function (/** Event */evt, /** Touch */touch, /** HTMLElement */target, /** Number */startIndex) {
			var _this = this,
				el = _this.el,
				options = _this.options,
				ownerDocument = el.ownerDocument,
				dragStartFn;

			if (target && !dragEl && (target.parentNode === el)) {
				tapEvt = evt;

				rootEl = el;
				dragEl = target;
				parentEl = dragEl.parentNode;
				nextEl = dragEl.nextSibling;
				lastDownEl = target;
				activeGroup = options.group;
				oldIndex = startIndex;

				this._lastX = (touch || evt).clientX;
				this._lastY = (touch || evt).clientY;

				dragEl.style['will-change'] = 'all';

				dragStartFn = function () {
					// Delayed drag has been triggered
					// we can re-enable the events: touchmove/mousemove
					_this._disableDelayedDrag();

					// Make the element draggable
					dragEl.draggable = _this.nativeDraggable;

					// Chosen item
					_toggleClass(dragEl, options.chosenClass, true);

					// Bind the events: dragstart/dragend
					_this._triggerDragStart(evt, touch);

					// Drag start event
					_dispatchEvent(_this, rootEl, 'choose', dragEl, rootEl, rootEl, oldIndex);
				};

				// Disable "draggable"
				options.ignore.split(',').forEach(function (criteria) {
					_find(dragEl, criteria.trim(), _disableDraggable);
				});

				_on(ownerDocument, 'mouseup', _this._onDrop);
				_on(ownerDocument, 'touchend', _this._onDrop);
				_on(ownerDocument, 'touchcancel', _this._onDrop);
				_on(ownerDocument, 'selectstart', _this);
				options.supportPointer && _on(ownerDocument, 'pointercancel', _this._onDrop);

				if (options.delay) {
					// If the user moves the pointer or let go the click or touch
					// before the delay has been reached:
					// disable the delayed drag
					_on(ownerDocument, 'mouseup', _this._disableDelayedDrag);
					_on(ownerDocument, 'touchend', _this._disableDelayedDrag);
					_on(ownerDocument, 'touchcancel', _this._disableDelayedDrag);
					_on(ownerDocument, 'mousemove', _this._disableDelayedDrag);
					_on(ownerDocument, 'touchmove', _this._disableDelayedDrag);
					options.supportPointer && _on(ownerDocument, 'pointermove', _this._disableDelayedDrag);

					_this._dragStartTimer = setTimeout(dragStartFn, options.delay);
				} else {
					dragStartFn();
				}


			}
		},

		_disableDelayedDrag: function () {
			var ownerDocument = this.el.ownerDocument;

			clearTimeout(this._dragStartTimer);
			_off(ownerDocument, 'mouseup', this._disableDelayedDrag);
			_off(ownerDocument, 'touchend', this._disableDelayedDrag);
			_off(ownerDocument, 'touchcancel', this._disableDelayedDrag);
			_off(ownerDocument, 'mousemove', this._disableDelayedDrag);
			_off(ownerDocument, 'touchmove', this._disableDelayedDrag);
			_off(ownerDocument, 'pointermove', this._disableDelayedDrag);
		},

		_triggerDragStart: function (/** Event */evt, /** Touch */touch) {
			touch = touch || (evt.pointerType == 'touch' ? evt : null);

			if (touch) {
				// Touch device support
				tapEvt = {
					target: dragEl,
					clientX: touch.clientX,
					clientY: touch.clientY
				};

				this._onDragStart(tapEvt, 'touch');
			}
			else if (!this.nativeDraggable) {
				this._onDragStart(tapEvt, true);
			}
			else {
				_on(dragEl, 'dragend', this);
				_on(rootEl, 'dragstart', this._onDragStart);
			}

			try {
				if (document.selection) {
					// Timeout neccessary for IE9
					_nextTick(function () {
						document.selection.empty();
					});
				} else {
					window.getSelection().removeAllRanges();
				}
			} catch (err) {
			}
		},

		_dragStarted: function () {
			if (rootEl && dragEl) {
				var options = this.options;

				// Apply effect
				_toggleClass(dragEl, options.ghostClass, true);
				_toggleClass(dragEl, options.dragClass, false);

				KvSortable.active = this;

				// Drag start event
				_dispatchEvent(this, rootEl, 'start', dragEl, rootEl, rootEl, oldIndex);
			} else {
				this._nulling();
			}
		},

		_emulateDragOver: function () {
			if (touchEvt) {
				if (this._lastX === touchEvt.clientX && this._lastY === touchEvt.clientY) {
					return;
				}

				this._lastX = touchEvt.clientX;
				this._lastY = touchEvt.clientY;

				if (!supportCssPointerEvents) {
					_css(ghostEl, 'display', 'none');
				}

				var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
				var parent = target;
				var i = touchDragOverListeners.length;

				if (target && target.shadowRoot) {
					target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
					parent = target;
				}

				if (parent) {
					do {
						if (parent[expando]) {
							while (i--) {
								touchDragOverListeners[i]({
									clientX: touchEvt.clientX,
									clientY: touchEvt.clientY,
									target: target,
									rootEl: parent
								});
							}

							break;
						}

						target = parent; // store last element
					}
					/* jshint boss:true */
					while (parent = parent.parentNode);
				}

				if (!supportCssPointerEvents) {
					_css(ghostEl, 'display', '');
				}
			}
		},


		_onTouchMove: function (/**TouchEvent*/evt) {
			if (tapEvt) {
				var	options = this.options,
					fallbackTolerance = options.fallbackTolerance,
					fallbackOffset = options.fallbackOffset,
					touch = evt.touches ? evt.touches[0] : evt,
					dx = (touch.clientX - tapEvt.clientX) + fallbackOffset.x,
					dy = (touch.clientY - tapEvt.clientY) + fallbackOffset.y,
					translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';

				// only set the status to dragging, when we are actually dragging
				if (!KvSortable.active) {
					if (fallbackTolerance &&
						min(abs(touch.clientX - this._lastX), abs(touch.clientY - this._lastY)) < fallbackTolerance
					) {
						return;
					}

					this._dragStarted();
				}

				// as well as creating the ghost element on the document body
				this._appendGhost();

				moved = true;
				touchEvt = touch;

				_css(ghostEl, 'webkitTransform', translate3d);
				_css(ghostEl, 'mozTransform', translate3d);
				_css(ghostEl, 'msTransform', translate3d);
				_css(ghostEl, 'transform', translate3d);

				evt.preventDefault();
			}
		},

		_appendGhost: function () {
			if (!ghostEl) {
				var rect = dragEl.getBoundingClientRect(),
					css = _css(dragEl),
					options = this.options,
					ghostRect;

				ghostEl = dragEl.cloneNode(true);

				_toggleClass(ghostEl, options.ghostClass, false);
				_toggleClass(ghostEl, options.fallbackClass, true);
				_toggleClass(ghostEl, options.dragClass, true);

				_css(ghostEl, 'top', rect.top - parseInt(css.marginTop, 10));
				_css(ghostEl, 'left', rect.left - parseInt(css.marginLeft, 10));
				_css(ghostEl, 'width', rect.width);
				_css(ghostEl, 'height', rect.height);
				_css(ghostEl, 'opacity', '0.8');
				_css(ghostEl, 'position', 'fixed');
				_css(ghostEl, 'zIndex', '100000');
				_css(ghostEl, 'pointerEvents', 'none');

				options.fallbackOnBody && document.body.appendChild(ghostEl) || rootEl.appendChild(ghostEl);

				// Fixing dimensions.
				ghostRect = ghostEl.getBoundingClientRect();
				_css(ghostEl, 'width', rect.width * 2 - ghostRect.width);
				_css(ghostEl, 'height', rect.height * 2 - ghostRect.height);
			}
		},

		_onDragStart: function (/**Event*/evt, /**boolean*/useFallback) {
			var _this = this;
			var dataTransfer = evt.dataTransfer;
			var options = _this.options;

			_this._offUpEvents();

			if (activeGroup.checkPull(_this, _this, dragEl, evt)) {
				cloneEl = _clone(dragEl);

				cloneEl.draggable = false;
				cloneEl.style['will-change'] = '';

				_css(cloneEl, 'display', 'none');
				_toggleClass(cloneEl, _this.options.chosenClass, false);

				// #1143: IFrame support workaround
				_this._cloneId = _nextTick(function () {
					rootEl.insertBefore(cloneEl, dragEl);
					_dispatchEvent(_this, rootEl, 'clone', dragEl);
				});
			}

			_toggleClass(dragEl, options.dragClass, true);

			if (useFallback) {
				if (useFallback === 'touch') {
					// Bind touch events
					_on(document, 'touchmove', _this._onTouchMove);
					_on(document, 'touchend', _this._onDrop);
					_on(document, 'touchcancel', _this._onDrop);

					if (options.supportPointer) {
						_on(document, 'pointermove', _this._onTouchMove);
						_on(document, 'pointerup', _this._onDrop);
					}
				} else {
					// Old brwoser
					_on(document, 'mousemove', _this._onTouchMove);
					_on(document, 'mouseup', _this._onDrop);
				}

				_this._loopId = setInterval(_this._emulateDragOver, 50);
			}
			else {
				if (dataTransfer) {
					dataTransfer.effectAllowed = 'move';
					options.setData && options.setData.call(_this, dataTransfer, dragEl);
				}

				_on(document, 'drop', _this);

				// #1143: Бывает элемент с IFrame внутри блокирует `drop`,
				// поэтому если вызвался `mouseover`, значит надо отменять весь d'n'd.
				// Breaking Chrome 62+
				// _on(document, 'mouseover', _this);

				_this._dragStartId = _nextTick(_this._dragStarted);
			}
		},

		_onDragOver: function (/**Event*/evt) {
			var el = this.el,
				target,
				dragRect,
				targetRect,
				revert,
				options = this.options,
				group = options.group,
				activeKvSortable = KvSortable.active,
				isOwner = (activeGroup === group),
				isMovingBetweenKvSortable = false,
				canSort = options.sort;

			if (evt.preventDefault !== void 0) {
				evt.preventDefault();
				!options.dragoverBubble && evt.stopPropagation();
			}

			if (dragEl.animated) {
				return;
			}

			moved = true;

			if (activeKvSortable && !options.disabled &&
				(isOwner
					? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list
					: (
						putKvSortable === this ||
						(
							(activeKvSortable.lastPullMode = activeGroup.checkPull(this, activeKvSortable, dragEl, evt)) &&
							group.checkPut(this, activeKvSortable, dragEl, evt)
						)
					)
				) &&
				(evt.rootEl === void 0 || evt.rootEl === this.el) // touch fallback
			) {
				// Smart auto-scrolling
				_autoScroll(evt, options, this.el);

				if (_silent) {
					return;
				}

				target = _closest(evt.target, options.draggable, el);
				dragRect = dragEl.getBoundingClientRect();

				if (putKvSortable !== this) {
					putKvSortable = this;
					isMovingBetweenKvSortable = true;
				}

				if (revert) {
					_cloneHide(activeKvSortable, true);
					parentEl = rootEl; // actualization

					if (cloneEl || nextEl) {
						rootEl.insertBefore(dragEl, cloneEl || nextEl);
					}
					else if (!canSort) {
						rootEl.appendChild(dragEl);
					}

					return;
				}


				if ((el.children.length === 0) || (el.children[0] === ghostEl) ||
					(el === evt.target) && (_ghostIsLast(el, evt))
				) {
					//assign target only if condition is true
					if (el.children.length !== 0 && el.children[0] !== ghostEl && el === evt.target) {
						target = el.lastElementChild;
					}

					if (target) {
						if (target.animated) {
							return;
						}

						targetRect = target.getBoundingClientRect();
					}

					_cloneHide(activeKvSortable, isOwner);

					if (_onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt) !== false) {
						if (!dragEl.contains(el)) {
							el.appendChild(dragEl);
							parentEl = el; // actualization
						}

						this._animate(dragRect, dragEl);
						target && this._animate(targetRect, target);
					}
				}
				else if (target && !target.animated && target !== dragEl && (target.parentNode[expando] !== void 0)) {
					if (lastEl !== target) {
						lastEl = target;
						lastCSS = _css(target);
						lastParentCSS = _css(target.parentNode);
					}

					targetRect = target.getBoundingClientRect();

					var width = targetRect.right - targetRect.left,
						height = targetRect.bottom - targetRect.top,
						floating = R_FLOAT.test(lastCSS.cssFloat + lastCSS.display)
							|| (lastParentCSS.display == 'flex' && lastParentCSS['flex-direction'].indexOf('row') === 0),
						isWide = (target.offsetWidth > dragEl.offsetWidth),
						isLong = (target.offsetHeight > dragEl.offsetHeight),
						halfway = (floating ? (evt.clientX - targetRect.left) / width : (evt.clientY - targetRect.top) / height) > 0.5,
						nextSibling = target.nextElementSibling,
						after = false
					;

					if (floating) {
						var elTop = dragEl.offsetTop,
							tgTop = target.offsetTop;

						if (elTop === tgTop) {
							after = (target.previousElementSibling === dragEl) && !isWide || halfway && isWide;
						}
						else if (target.previousElementSibling === dragEl || dragEl.previousElementSibling === target) {
							after = (evt.clientY - targetRect.top) / height > 0.5;
						} else {
							after = tgTop > elTop;
						}
						} else if (!isMovingBetweenKvSortable) {
						after = (nextSibling !== dragEl) && !isLong || halfway && isLong;
					}

					var moveVector = _onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt, after);

					if (moveVector !== false) {
						if (moveVector === 1 || moveVector === -1) {
							after = (moveVector === 1);
						}

						_silent = true;
						setTimeout(_unsilent, 30);

						_cloneHide(activeKvSortable, isOwner);

						if (!dragEl.contains(el)) {
							if (after && !nextSibling) {
								el.appendChild(dragEl);
							} else {
								target.parentNode.insertBefore(dragEl, after ? nextSibling : target);
							}
						}

						parentEl = dragEl.parentNode; // actualization

						this._animate(dragRect, dragEl);
						this._animate(targetRect, target);
					}
				}
			}
		},

		_animate: function (prevRect, target) {
			var ms = this.options.animation;

			if (ms) {
				var currentRect = target.getBoundingClientRect();

				if (prevRect.nodeType === 1) {
					prevRect = prevRect.getBoundingClientRect();
				}

				_css(target, 'transition', 'none');
				_css(target, 'transform', 'translate3d('
					+ (prevRect.left - currentRect.left) + 'px,'
					+ (prevRect.top - currentRect.top) + 'px,0)'
				);

				target.offsetWidth; // repaint

				_css(target, 'transition', 'all ' + ms + 'ms');
				_css(target, 'transform', 'translate3d(0,0,0)');

				clearTimeout(target.animated);
				target.animated = setTimeout(function () {
					_css(target, 'transition', '');
					_css(target, 'transform', '');
					target.animated = false;
				}, ms);
			}
		},

		_offUpEvents: function () {
			var ownerDocument = this.el.ownerDocument;

			_off(document, 'touchmove', this._onTouchMove);
			_off(document, 'pointermove', this._onTouchMove);
			_off(ownerDocument, 'mouseup', this._onDrop);
			_off(ownerDocument, 'touchend', this._onDrop);
			_off(ownerDocument, 'pointerup', this._onDrop);
			_off(ownerDocument, 'touchcancel', this._onDrop);
			_off(ownerDocument, 'pointercancel', this._onDrop);
			_off(ownerDocument, 'selectstart', this);
		},

		_onDrop: function (/**Event*/evt) {
			var el = this.el,
				options = this.options;

			clearInterval(this._loopId);
			clearInterval(autoScroll.pid);
			clearTimeout(this._dragStartTimer);

			_cancelNextTick(this._cloneId);
			_cancelNextTick(this._dragStartId);

			// Unbind events
			_off(document, 'mouseover', this);
			_off(document, 'mousemove', this._onTouchMove);

			if (this.nativeDraggable) {
				_off(document, 'drop', this);
				_off(el, 'dragstart', this._onDragStart);
			}

			this._offUpEvents();

			if (evt) {
				if (moved) {
					evt.preventDefault();
					!options.dropBubble && evt.stopPropagation();
				}

				ghostEl && ghostEl.parentNode && ghostEl.parentNode.removeChild(ghostEl);

				if (rootEl === parentEl || KvSortable.active.lastPullMode !== 'clone') {
					// Remove clone
					cloneEl && cloneEl.parentNode && cloneEl.parentNode.removeChild(cloneEl);
				}

				if (dragEl) {
					if (this.nativeDraggable) {
						_off(dragEl, 'dragend', this);
					}

					_disableDraggable(dragEl);
					dragEl.style['will-change'] = '';

					// Remove class's
					_toggleClass(dragEl, this.options.ghostClass, false);
					_toggleClass(dragEl, this.options.chosenClass, false);

					// Drag stop event
					_dispatchEvent(this, rootEl, 'unchoose', dragEl, parentEl, rootEl, oldIndex);

					if (rootEl !== parentEl) {
						newIndex = _index(dragEl, options.draggable);

						if (newIndex >= 0) {
							// Add event
							_dispatchEvent(null, parentEl, 'add', dragEl, parentEl, rootEl, oldIndex, newIndex);

							// Remove event
							_dispatchEvent(this, rootEl, 'remove', dragEl, parentEl, rootEl, oldIndex, newIndex);

							// drag from one list and drop into another
							_dispatchEvent(null, parentEl, 'sort', dragEl, parentEl, rootEl, oldIndex, newIndex);
							_dispatchEvent(this, rootEl, 'sort', dragEl, parentEl, rootEl, oldIndex, newIndex);
						}
					}
					else {
						if (dragEl.nextSibling !== nextEl) {
							// Get the index of the dragged element within its parent
							newIndex = _index(dragEl, options.draggable);

							if (newIndex >= 0) {
								// drag & drop within the same list
								_dispatchEvent(this, rootEl, 'update', dragEl, parentEl, rootEl, oldIndex, newIndex);
								_dispatchEvent(this, rootEl, 'sort', dragEl, parentEl, rootEl, oldIndex, newIndex);
							}
						}
					}

					if (KvSortable.active) {
						/* jshint eqnull:true */
						if (newIndex == null || newIndex === -1) {
							newIndex = oldIndex;
						}

						_dispatchEvent(this, rootEl, 'end', dragEl, parentEl, rootEl, oldIndex, newIndex);

						// Save sorting
						this.save();
					}
				}

			}

			this._nulling();
		},

		_nulling: function() {
			rootEl =
			dragEl =
			parentEl =
			ghostEl =
			nextEl =
			cloneEl =
			lastDownEl =

			scrollEl =
			scrollParentEl =

			tapEvt =
			touchEvt =

			moved =
			newIndex =

			lastEl =
			lastCSS =

			putKvSortable =
			activeGroup =
			KvSortable.active = null;

			savedInputChecked.forEach(function (el) {
				el.checked = true;
			});
			savedInputChecked.length = 0;
		},

		handleEvent: function (/**Event*/evt) {
			switch (evt.type) {
				case 'drop':
				case 'dragend':
					this._onDrop(evt);
					break;

				case 'dragover':
				case 'dragenter':
					if (dragEl) {
						this._onDragOver(evt);
						_globalDragOver(evt);
					}
					break;

				case 'mouseover':
					this._onDrop(evt);
					break;

				case 'selectstart':
					evt.preventDefault();
					break;
			}
		},


		/**
		 * Serializes the item into an array of string.
		 * @returns {String[]}
		 */
		toArray: function () {
			var order = [],
				el,
				children = this.el.children,
				i = 0,
				n = children.length,
				options = this.options;

			for (; i < n; i++) {
				el = children[i];
				if (_closest(el, options.draggable, this.el)) {
					order.push(el.getAttribute(options.dataIdAttr) || _generateId(el));
				}
			}

			return order;
		},


		/**
		 * Sorts the elements according to the array.
		 * @param  {String[]}  order  order of the items
		 */
		sort: function (order) {
			var items = {}, rootEl = this.el;

			this.toArray().forEach(function (id, i) {
				var el = rootEl.children[i];

				if (_closest(el, this.options.draggable, rootEl)) {
					items[id] = el;
				}
			}, this);

			order.forEach(function (id) {
				if (items[id]) {
					rootEl.removeChild(items[id]);
					rootEl.appendChild(items[id]);
				}
			});
		},


		/**
		 * Save the current sorting
		 */
		save: function () {
			var store = this.options.store;
			store && store.set(this);
		},


		/**
		 * For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
		 * @param   {HTMLElement}  el
		 * @param   {String}       [selector]  default: `options.draggable`
		 * @returns {HTMLElement|null}
		 */
		closest: function (el, selector) {
			return _closest(el, selector || this.options.draggable, this.el);
		},


		/**
		 * Set/get option
		 * @param   {string} name
		 * @param   {*}      [value]
		 * @returns {*}
		 */
		option: function (name, value) {
			var options = this.options;

			if (value === void 0) {
				return options[name];
			} else {
				options[name] = value;

				if (name === 'group') {
					_prepareGroup(options);
				}
			}
		},


		/**
		 * Destroy
		 */
		destroy: function () {
			var el = this.el;

			el[expando] = null;

			_off(el, 'mousedown', this._onTapStart);
			_off(el, 'touchstart', this._onTapStart);
			_off(el, 'pointerdown', this._onTapStart);

			if (this.nativeDraggable) {
				_off(el, 'dragover', this);
				_off(el, 'dragenter', this);
			}

			// Remove draggable attributes
			Array.prototype.forEach.call(el.querySelectorAll('[draggable]'), function (el) {
				el.removeAttribute('draggable');
			});

			touchDragOverListeners.splice(touchDragOverListeners.indexOf(this._onDragOver), 1);

			this._onDrop();

			this.el = el = null;
		}
	};


	function _cloneHide(kvsortable, state) {
		if (kvsortable.lastPullMode !== 'clone') {
			state = true;
		}

		if (cloneEl && (cloneEl.state !== state)) {
			_css(cloneEl, 'display', state ? 'none' : '');

			if (!state) {
				if (cloneEl.state) {
					if (kvsortable.options.group.revertClone) {
						rootEl.insertBefore(cloneEl, nextEl);
						kvsortable._animate(dragEl, cloneEl);
					} else {
						rootEl.insertBefore(cloneEl, dragEl);
					}
				}
			}

			cloneEl.state = state;
		}
	}


	function _closest(/**HTMLElement*/el, /**String*/selector, /**HTMLElement*/ctx) {
		if (el) {
			ctx = ctx || document;

			do {
				if ((selector === '>*' && el.parentNode === ctx) || _matches(el, selector)) {
					return el;
				}
				/* jshint boss:true */
			} while (el = _getParentOrHost(el));
		}

		return null;
	}


	function _getParentOrHost(el) {
		var parent = el.host;

		return (parent && parent.nodeType) ? parent : el.parentNode;
	}


	function _globalDragOver(/**Event*/evt) {
		if (evt.dataTransfer) {
			evt.dataTransfer.dropEffect = 'move';
		}
		evt.preventDefault();
	}


	function _on(el, event, fn) {
		el.addEventListener(event, fn, captureMode);
	}


	function _off(el, event, fn) {
		el.removeEventListener(event, fn, captureMode);
	}


	function _toggleClass(el, name, state) {
		if (el) {
			if (el.classList) {
				el.classList[state ? 'add' : 'remove'](name);
			}
			else {
				var className = (' ' + el.className + ' ').replace(R_SPACE, ' ').replace(' ' + name + ' ', ' ');
				el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ');
			}
		}
	}


	function _css(el, prop, val) {
		var style = el && el.style;

		if (style) {
			if (val === void 0) {
				if (document.defaultView && document.defaultView.getComputedStyle) {
					val = document.defaultView.getComputedStyle(el, '');
				}
				else if (el.currentStyle) {
					val = el.currentStyle;
				}

				return prop === void 0 ? val : val[prop];
			}
			else {
				if (!(prop in style)) {
					prop = '-webkit-' + prop;
				}

				style[prop] = val + (typeof val === 'string' ? '' : 'px');
			}
		}
	}


	function _find(ctx, tagName, iterator) {
		if (ctx) {
			var list = ctx.getElementsByTagName(tagName), i = 0, n = list.length;

			if (iterator) {
				for (; i < n; i++) {
					iterator(list[i], i);
				}
			}

			return list;
		}

		return [];
	}



	function _dispatchEvent(kvsortable, rootEl, name, targetEl, toEl, fromEl, startIndex, newIndex) {
		kvsortable = (kvsortable || rootEl[expando]);

		var evt = document.createEvent('Event'),
			options = kvsortable.options,
			onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1);

		evt.initEvent(name, true, true);

		evt.to = toEl || rootEl;
		evt.from = fromEl || rootEl;
		evt.item = targetEl || rootEl;
		evt.clone = cloneEl;

		evt.oldIndex = startIndex;
		evt.newIndex = newIndex;

		rootEl.dispatchEvent(evt);

		if (options[onName]) {
			options[onName].call(kvsortable, evt);
		}
	}


	function _onMove(fromEl, toEl, dragEl, dragRect, targetEl, targetRect, originalEvt, willInsertAfter) {
		var evt,
			kvsortable = fromEl[expando],
			onMoveFn = kvsortable.options.onMove,
			retVal;

		evt = document.createEvent('Event');
		evt.initEvent('move', true, true);

		evt.to = toEl;
		evt.from = fromEl;
		evt.dragged = dragEl;
		evt.draggedRect = dragRect;
		evt.related = targetEl || toEl;
		evt.relatedRect = targetRect || toEl.getBoundingClientRect();
		evt.willInsertAfter = willInsertAfter;

		fromEl.dispatchEvent(evt);

		if (onMoveFn) {
			retVal = onMoveFn.call(kvsortable, evt, originalEvt);
		}

		return retVal;
	}


	function _disableDraggable(el) {
		el.draggable = false;
	}


	function _unsilent() {
		_silent = false;
	}


	/** @returns {HTMLElement|false} */
	function _ghostIsLast(el, evt) {
		var lastEl = el.lastElementChild,
			rect = lastEl.getBoundingClientRect();

		// 5 — min delta
		// abs — нельзя добавлять, а то глюки при наведении сверху
		return (evt.clientY - (rect.top + rect.height) > 5) ||
			(evt.clientX - (rect.left + rect.width) > 5);
	}


	/**
	 * Generate id
	 * @param   {HTMLElement} el
	 * @returns {String}
	 * @private
	 */
	function _generateId(el) {
		var str = el.tagName + el.className + el.src + el.href + el.textContent,
			i = str.length,
			sum = 0;

		while (i--) {
			sum += str.charCodeAt(i);
		}

		return sum.toString(36);
	}

	/**
	 * Returns the index of an element within its parent for a selected set of
	 * elements
	 * @param  {HTMLElement} el
	 * @param  {selector} selector
	 * @return {number}
	 */
	function _index(el, selector) {
		var index = 0;

		if (!el || !el.parentNode) {
			return -1;
		}

		while (el && (el = el.previousElementSibling)) {
			if ((el.nodeName.toUpperCase() !== 'TEMPLATE') && (selector === '>*' || _matches(el, selector))) {
				index++;
			}
		}

		return index;
	}

	function _matches(/**HTMLElement*/el, /**String*/selector) {
		if (el) {
			selector = selector.split('.');

			var tag = selector.shift().toUpperCase(),
				re = new RegExp('\\s(' + selector.join('|') + ')(?=\\s)', 'g');

			return (
				(tag === '' || el.nodeName.toUpperCase() == tag) &&
				(!selector.length || ((' ' + el.className + ' ').match(re) || []).length == selector.length)
			);
		}

		return false;
	}

	function _throttle(callback, ms) {
		var args, _this;

		return function () {
			if (args === void 0) {
				args = arguments;
				_this = this;

				setTimeout(function () {
					if (args.length === 1) {
						callback.call(_this, args[0]);
					} else {
						callback.apply(_this, args);
					}

					args = void 0;
				}, ms);
			}
		};
	}

	function _extend(dst, src) {
		if (dst && src) {
			for (var key in src) {
				if (src.hasOwnProperty(key)) {
					dst[key] = src[key];
				}
			}
		}

		return dst;
	}

	function _clone(el) {
		if (Polymer && Polymer.dom) {
			return Polymer.dom(el).cloneNode(true);
		}
		else if ($) {
			return $(el).clone(true)[0];
		}
		else {
			return el.cloneNode(true);
		}
	}

	function _saveInputCheckedState(root) {
		var inputs = root.getElementsByTagName('input');
		var idx = inputs.length;

		while (idx--) {
			var el = inputs[idx];
			el.checked && savedInputChecked.push(el);
		}
	}

	function _nextTick(fn) {
		return setTimeout(fn, 0);
	}

	function _cancelNextTick(id) {
		return clearTimeout(id);
	}

	// Fixed #973:
	_on(document, 'touchmove', function (evt) {
		if (KvSortable.active) {
			evt.preventDefault();
		}
	});

	// Export utils
	KvSortable.utils = {
		on: _on,
		off: _off,
		css: _css,
		find: _find,
		is: function (el, selector) {
			return !!_closest(el, selector, el);
		},
		extend: _extend,
		throttle: _throttle,
		closest: _closest,
		toggleClass: _toggleClass,
		clone: _clone,
		index: _index,
		nextTick: _nextTick,
		cancelNextTick: _cancelNextTick
	};


	/**
	 * Create kvsortable instance
	 * @param {HTMLElement}  el
	 * @param {Object}      [options]
	 */
	KvSortable.create = function (el, options) {
		return new KvSortable(el, options);
	};


	// Export
	KvSortable.version = '1.7.0';
	return KvSortable;
});
/**
 * jQuery plugin for KvSortable
 */
(function (factory) {
    "use strict";

    if (typeof define === "function" && define.amd) {
        define(["jquery"], factory);
    }
    else {
        /* jshint sub:true */
        factory(jQuery);
    }
})(function ($) {
    "use strict";
    $.fn.kvsortable = function (options) {
        var retVal,
            args = arguments;

        this.each(function () {
            var $el = $(this), kvsortable = $el.data('kvsortable');

            if (!kvsortable && (options instanceof Object || !options)) {
                kvsortable = new KvSortable(this, options);
                $el.data('kvsortable', kvsortable);
            }

            if (kvsortable) {
                if (options === 'widget') {
                    retVal = kvsortable;
                }
                else if (options === 'destroy') {
                    kvsortable.destroy();
                    $el.removeData('kvsortable');
                }
                else if (typeof kvsortable[options] === 'function') {
                    retVal = kvsortable[options].apply(kvsortable, [].slice.call(args, 1));
                }
                else if (options in kvsortable.options) {
                    retVal = kvsortable.option.apply(kvsortable, args);
                }
            }
        });

        return (retVal === void 0) ? this : retVal;
    };
});(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.DOMPurify = factory());
}(this, (function () { 'use strict';

var html = ['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr'];

// SVG
var svg = ['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'audio', 'canvas', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'video', 'view', 'vkern'];

var svgFilters = ['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence'];

var mathMl = ['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmuliscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mpspace', 'msqrt', 'mystyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover'];

var text = ['#text'];

var html$1 = ['accept', 'action', 'align', 'alt', 'autocomplete', 'background', 'bgcolor', 'border', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'coords', 'crossorigin', 'datetime', 'default', 'dir', 'disabled', 'download', 'enctype', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'integrity', 'ismap', 'label', 'lang', 'list', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'multiple', 'name', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns'];

var svg$1 = ['accent-height', 'accumulate', 'additivive', 'alignment-baseline', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'specularconstant', 'specularexponent', 'spreadmethod', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'tabindex', 'targetx', 'targety', 'transform', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan'];

var mathMl$1 = ['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns'];

var xml = ['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink'];

/* Add properties to a lookup table */
function addToSet(set, array) {
  var l = array.length;
  while (l--) {
    if (typeof array[l] === 'string') {
      array[l] = array[l].toLowerCase();
    }
    set[array[l]] = true;
  }
  return set;
}

/* Shallow clone an object */
function clone(object) {
  var newObject = {};
  var property = void 0;
  for (property in object) {
    if (Object.prototype.hasOwnProperty.call(object, property)) {
      newObject[property] = object[property];
    }
  }
  return newObject;
}

var MUSTACHE_EXPR = /\{\{[\s\S]*|[\s\S]*\}\}/gm; // Specify template detection regex for SAFE_FOR_TEMPLATES mode
var ERB_EXPR = /<%[\s\S]*|[\s\S]*%>/gm;
var DATA_ATTR = /^data-[\-\w.\u00B7-\uFFFF]/; // eslint-disable-line no-useless-escape
var ARIA_ATTR = /^aria-[\-\w]+$/; // eslint-disable-line no-useless-escape
var IS_ALLOWED_URI = /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i; // eslint-disable-line no-useless-escape
var IS_SCRIPT_OR_DATA = /^(?:\w+script|data):/i;
var ATTR_WHITESPACE = /[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205f\u3000]/g; // eslint-disable-line no-control-regex

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

var getGlobal = function getGlobal() {
  return typeof window === 'undefined' ? null : window;
};

function createDOMPurify() {
  var window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();

  var DOMPurify = function DOMPurify(root) {
    return createDOMPurify(root);
  };

  /**
   * Version label, exposed for easier checks
   * if DOMPurify is up to date or not
   */
  DOMPurify.version = '1.0.7';

  /**
   * Array of elements that DOMPurify removed during sanitation.
   * Empty if nothing was removed.
   */
  DOMPurify.removed = [];

  if (!window || !window.document || window.document.nodeType !== 9) {
    // Not running in a browser, provide a factory function
    // so that you can pass your own Window
    DOMPurify.isSupported = false;

    return DOMPurify;
  }

  var originalDocument = window.document;
  var useDOMParser = false; // See comment below
  var removeTitle = false; // See comment below

  var document = window.document;
  var DocumentFragment = window.DocumentFragment,
      HTMLTemplateElement = window.HTMLTemplateElement,
      Node = window.Node,
      NodeFilter = window.NodeFilter,
      _window$NamedNodeMap = window.NamedNodeMap,
      NamedNodeMap = _window$NamedNodeMap === undefined ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap,
      Text = window.Text,
      Comment = window.Comment,
      DOMParser = window.DOMParser;

  // As per issue #47, the web-components registry is inherited by a
  // new document created via createHTMLDocument. As per the spec
  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
  // a new empty registry is used when creating a template contents owner
  // document, so we use that as our parent document to ensure nothing
  // is inherited.

  if (typeof HTMLTemplateElement === 'function') {
    var template = document.createElement('template');
    if (template.content && template.content.ownerDocument) {
      document = template.content.ownerDocument;
    }
  }

  var _document = document,
      implementation = _document.implementation,
      createNodeIterator = _document.createNodeIterator,
      getElementsByTagName = _document.getElementsByTagName,
      createDocumentFragment = _document.createDocumentFragment;
  var importNode = originalDocument.importNode;


  var hooks = {};

  /**
   * Expose whether this browser supports running the full DOMPurify.
   */
  DOMPurify.isSupported = implementation && typeof implementation.createHTMLDocument !== 'undefined' && document.documentMode !== 9;

  var MUSTACHE_EXPR$$1 = MUSTACHE_EXPR,
      ERB_EXPR$$1 = ERB_EXPR,
      DATA_ATTR$$1 = DATA_ATTR,
      ARIA_ATTR$$1 = ARIA_ATTR,
      IS_SCRIPT_OR_DATA$$1 = IS_SCRIPT_OR_DATA,
      ATTR_WHITESPACE$$1 = ATTR_WHITESPACE;
  var IS_ALLOWED_URI$$1 = IS_ALLOWED_URI;
  /**
   * We consider the elements and attributes below to be safe. Ideally
   * don't add any new ones but feel free to remove unwanted ones.
   */

  /* allowed element names */

  var ALLOWED_TAGS = null;
  var DEFAULT_ALLOWED_TAGS = addToSet({}, [].concat(_toConsumableArray(html), _toConsumableArray(svg), _toConsumableArray(svgFilters), _toConsumableArray(mathMl), _toConsumableArray(text)));

  /* Allowed attribute names */
  var ALLOWED_ATTR = null;
  var DEFAULT_ALLOWED_ATTR = addToSet({}, [].concat(_toConsumableArray(html$1), _toConsumableArray(svg$1), _toConsumableArray(mathMl$1), _toConsumableArray(xml)));

  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
  var FORBID_TAGS = null;

  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
  var FORBID_ATTR = null;

  /* Decide if ARIA attributes are okay */
  var ALLOW_ARIA_ATTR = true;

  /* Decide if custom data attributes are okay */
  var ALLOW_DATA_ATTR = true;

  /* Decide if unknown protocols are okay */
  var ALLOW_UNKNOWN_PROTOCOLS = false;

  /* Output should be safe for jQuery's $() factory? */
  var SAFE_FOR_JQUERY = false;

  /* Output should be safe for common template engines.
   * This means, DOMPurify removes data attributes, mustaches and ERB
   */
  var SAFE_FOR_TEMPLATES = false;

  /* Decide if document with <html>... should be returned */
  var WHOLE_DOCUMENT = false;

  /* Track whether config is already set on this instance of DOMPurify. */
  var SET_CONFIG = false;

  /* Decide if all elements (e.g. style, script) must be children of
   * document.body. By default, browsers might move them to document.head */
  var FORCE_BODY = false;

  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html string.
   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
   */
  var RETURN_DOM = false;

  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html string */
  var RETURN_DOM_FRAGMENT = false;

  /* If `RETURN_DOM` or `RETURN_DOM_FRAGMENT` is enabled, decide if the returned DOM
   * `Node` is imported into the current `Document`. If this flag is not enabled the
   * `Node` will belong (its ownerDocument) to a fresh `HTMLDocument`, created by
   * DOMPurify. */
  var RETURN_DOM_IMPORT = false;

  /* Output should be free from DOM clobbering attacks? */
  var SANITIZE_DOM = true;

  /* Keep element content when removing element? */
  var KEEP_CONTENT = true;

  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
   * of importing it into a new Document and returning a sanitized copy */
  var IN_PLACE = false;

  /* Allow usage of profiles like html, svg and mathMl */
  var USE_PROFILES = {};

  /* Tags to ignore content of when KEEP_CONTENT is true */
  var FORBID_CONTENTS = addToSet({}, ['audio', 'head', 'math', 'script', 'style', 'template', 'svg', 'video']);

  /* Tags that are safe for data: URIs */
  var DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image']);

  /* Attributes safe for values like "javascript:" */
  var URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'summary', 'title', 'value', 'style', 'xmlns']);

  /* Keep a reference to config to pass to hooks */
  var CONFIG = null;

  /* Ideally, do not touch anything below this line */
  /* ______________________________________________ */

  var formElement = document.createElement('form');

  /**
   * _parseConfig
   *
   * @param  {Object} cfg optional config literal
   */
  // eslint-disable-next-line complexity
  var _parseConfig = function _parseConfig(cfg) {
    /* Shield configuration object from tampering */
    if ((typeof cfg === 'undefined' ? 'undefined' : _typeof(cfg)) !== 'object') {
      cfg = {};
    }
    /* Set configuration parameters */
    ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS) : DEFAULT_ALLOWED_TAGS;
    ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR) : DEFAULT_ALLOWED_ATTR;
    FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS) : {};
    FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR) : {};
    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
    SAFE_FOR_JQUERY = cfg.SAFE_FOR_JQUERY || false; // Default false
    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
    RETURN_DOM = cfg.RETURN_DOM || false; // Default false
    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
    RETURN_DOM_IMPORT = cfg.RETURN_DOM_IMPORT || false; // Default false
    FORCE_BODY = cfg.FORCE_BODY || false; // Default false
    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
    IN_PLACE = cfg.IN_PLACE || false; // Default false

    IS_ALLOWED_URI$$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI$$1;

    if (SAFE_FOR_TEMPLATES) {
      ALLOW_DATA_ATTR = false;
    }

    if (RETURN_DOM_FRAGMENT) {
      RETURN_DOM = true;
    }

    /* Parse profile info */
    if (USE_PROFILES) {
      ALLOWED_TAGS = addToSet({}, [].concat(_toConsumableArray(text)));
      ALLOWED_ATTR = [];
      if (USE_PROFILES.html === true) {
        addToSet(ALLOWED_TAGS, html);
        addToSet(ALLOWED_ATTR, html$1);
      }
      if (USE_PROFILES.svg === true) {
        addToSet(ALLOWED_TAGS, svg);
        addToSet(ALLOWED_ATTR, svg$1);
        addToSet(ALLOWED_ATTR, xml);
      }
      if (USE_PROFILES.svgFilters === true) {
        addToSet(ALLOWED_TAGS, svgFilters);
        addToSet(ALLOWED_ATTR, svg$1);
        addToSet(ALLOWED_ATTR, xml);
      }
      if (USE_PROFILES.mathMl === true) {
        addToSet(ALLOWED_TAGS, mathMl);
        addToSet(ALLOWED_ATTR, mathMl$1);
        addToSet(ALLOWED_ATTR, xml);
      }
    }

    /* Merge configuration parameters */
    if (cfg.ADD_TAGS) {
      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
        ALLOWED_TAGS = clone(ALLOWED_TAGS);
      }
      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS);
    }
    if (cfg.ADD_ATTR) {
      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
        ALLOWED_ATTR = clone(ALLOWED_ATTR);
      }
      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR);
    }
    if (cfg.ADD_URI_SAFE_ATTR) {
      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR);
    }

    /* Add #text in case KEEP_CONTENT is set to true */
    if (KEEP_CONTENT) {
      ALLOWED_TAGS['#text'] = true;
    }

    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
    if (WHOLE_DOCUMENT) {
      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
    }

    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286 */
    if (ALLOWED_TAGS.table) {
      addToSet(ALLOWED_TAGS, ['tbody']);
    }

    // Prevent further manipulation of configuration.
    // Not available in IE8, Safari 5, etc.
    if (Object && 'freeze' in Object) {
      Object.freeze(cfg);
    }

    CONFIG = cfg;
  };

  /**
   * _forceRemove
   *
   * @param  {Node} node a DOM node
   */
  var _forceRemove = function _forceRemove(node) {
    DOMPurify.removed.push({ element: node });
    try {
      node.parentNode.removeChild(node);
    } catch (err) {
      node.outerHTML = '';
    }
  };

  /**
   * _removeAttribute
   *
   * @param  {String} name an Attribute name
   * @param  {Node} node a DOM node
   */
  var _removeAttribute = function _removeAttribute(name, node) {
    try {
      DOMPurify.removed.push({
        attribute: node.getAttributeNode(name),
        from: node
      });
    } catch (err) {
      DOMPurify.removed.push({
        attribute: null,
        from: node
      });
    }
    node.removeAttribute(name);
  };

  /**
   * _initDocument
   *
   * @param  {String} dirty a string of dirty markup
   * @return {Document} a DOM, filled with the dirty markup
   */
  var _initDocument = function _initDocument(dirty) {
    /* Create a HTML document */
    var doc = void 0;

    if (FORCE_BODY) {
      dirty = '<remove></remove>' + dirty;
    }

    /* Use DOMParser to workaround Firefox bug (see comment below) */
    if (useDOMParser) {
      try {
        doc = new DOMParser().parseFromString(dirty, 'text/html');
      } catch (err) {}
    }

    /* Remove title to fix an mXSS bug in older MS Edge */
    if (removeTitle) {
      addToSet(FORBID_TAGS, ['title']);
    }

    /* Otherwise use createHTMLDocument, because DOMParser is unsafe in
    Safari (see comment below) */
    if (!doc || !doc.documentElement) {
      doc = implementation.createHTMLDocument('');
      var _doc = doc,
          body = _doc.body;

      body.parentNode.removeChild(body.parentNode.firstElementChild);
      body.outerHTML = dirty;
    }

    /* Work on whole document or just its body */
    return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
  };

  // Firefox uses a different parser for innerHTML rather than
  // DOMParser (see https://bugzilla.mozilla.org/show_bug.cgi?id=1205631)
  // which means that you *must* use DOMParser, otherwise the output may
  // not be safe if used in a document.write context later.
  //
  // So we feature detect the Firefox bug and use the DOMParser if necessary.
  //
  // MS Edge, in older versions, is affected by an mXSS behavior. The second
  // check tests for the behavior and fixes it if necessary.
  if (DOMPurify.isSupported) {
    (function () {
      try {
        var doc = _initDocument('<svg><p><style><img src="</style><img src=x onerror=alert(1)//">');
        if (doc.querySelector('svg img')) {
          useDOMParser = true;
        }
      } catch (err) {}
    })();
    (function () {
      try {
        var doc = _initDocument('<x/><title>&lt;/title&gt;&lt;img&gt;');
        if (doc.querySelector('title').textContent.match(/<\/title/)) {
          removeTitle = true;
        }
      } catch (err) {}
    })();
  }

  /**
   * _createIterator
   *
   * @param  {Document} root document/fragment to create iterator for
   * @return {Iterator} iterator instance
   */
  var _createIterator = function _createIterator(root) {
    return createNodeIterator.call(root.ownerDocument || root, root, NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, function () {
      return NodeFilter.FILTER_ACCEPT;
    }, false);
  };

  /**
   * _isClobbered
   *
   * @param  {Node} elm element to check for clobbering attacks
   * @return {Boolean} true if clobbered, false if safe
   */
  var _isClobbered = function _isClobbered(elm) {
    if (elm instanceof Text || elm instanceof Comment) {
      return false;
    }
    if (typeof elm.nodeName !== 'string' || typeof elm.textContent !== 'string' || typeof elm.removeChild !== 'function' || !(elm.attributes instanceof NamedNodeMap) || typeof elm.removeAttribute !== 'function' || typeof elm.setAttribute !== 'function') {
      return true;
    }
    return false;
  };

  /**
   * _isNode
   *
   * @param  {Node} obj object to check whether it's a DOM node
   * @return {Boolean} true is object is a DOM node
   */
  var _isNode = function _isNode(obj) {
    return (typeof Node === 'undefined' ? 'undefined' : _typeof(Node)) === 'object' ? obj instanceof Node : obj && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object' && typeof obj.nodeType === 'number' && typeof obj.nodeName === 'string';
  };

  /**
   * _executeHook
   * Execute user configurable hooks
   *
   * @param  {String} entryPoint  Name of the hook's entry point
   * @param  {Node} currentNode node to work on with the hook
   * @param  {Object} data additional hook parameters
   */
  var _executeHook = function _executeHook(entryPoint, currentNode, data) {
    if (!hooks[entryPoint]) {
      return;
    }

    hooks[entryPoint].forEach(function (hook) {
      hook.call(DOMPurify, currentNode, data, CONFIG);
    });
  };

  /**
   * _sanitizeElements
   *
   * @protect nodeName
   * @protect textContent
   * @protect removeChild
   *
   * @param   {Node} currentNode to check for permission to exist
   * @return  {Boolean} true if node was killed, false if left alive
   */
  var _sanitizeElements = function _sanitizeElements(currentNode) {
    var content = void 0;

    /* Execute a hook if present */
    _executeHook('beforeSanitizeElements', currentNode, null);

    /* Check if element is clobbered or can clobber */
    if (_isClobbered(currentNode)) {
      _forceRemove(currentNode);
      return true;
    }

    /* Now let's check the element's type and name */
    var tagName = currentNode.nodeName.toLowerCase();

    /* Execute a hook if present */
    _executeHook('uponSanitizeElement', currentNode, {
      tagName: tagName,
      allowedTags: ALLOWED_TAGS
    });

    /* Remove element if anything forbids its presence */
    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
      /* Keep content except for black-listed elements */
      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName] && typeof currentNode.insertAdjacentHTML === 'function') {
        try {
          currentNode.insertAdjacentHTML('AfterEnd', currentNode.innerHTML);
        } catch (err) {}
      }
      _forceRemove(currentNode);
      return true;
    }

    /* Convert markup to cover jQuery behavior */
    if (SAFE_FOR_JQUERY && !currentNode.firstElementChild && (!currentNode.content || !currentNode.content.firstElementChild) && /</g.test(currentNode.textContent)) {
      DOMPurify.removed.push({ element: currentNode.cloneNode() });
      if (currentNode.innerHTML) {
        currentNode.innerHTML = currentNode.innerHTML.replace(/</g, '&lt;');
      } else {
        currentNode.innerHTML = currentNode.textContent.replace(/</g, '&lt;');
      }
    }

    /* Sanitize element content to be template-safe */
    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
      /* Get the element's text content */
      content = currentNode.textContent;
      content = content.replace(MUSTACHE_EXPR$$1, ' ');
      content = content.replace(ERB_EXPR$$1, ' ');
      if (currentNode.textContent !== content) {
        DOMPurify.removed.push({ element: currentNode.cloneNode() });
        currentNode.textContent = content;
      }
    }

    /* Execute a hook if present */
    _executeHook('afterSanitizeElements', currentNode, null);

    return false;
  };

  /**
   * _isValidAttribute
   *
   * @param  {string} lcTag Lowercase tag name of containing element.
   * @param  {string} lcName Lowercase attribute name.
   * @param  {string} value Attribute value.
   * @return {Boolean} Returns true if `value` is valid, otherwise false.
   */
  var _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
    /* Make sure attribute cannot clobber */
    if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
      return false;
    }

    /* Sanitize attribute content to be template-safe */
    if (SAFE_FOR_TEMPLATES) {
      value = value.replace(MUSTACHE_EXPR$$1, ' ');
      value = value.replace(ERB_EXPR$$1, ' ');
    }

    /* Allow valid data-* attributes: At least one character after "-"
        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
        We don't need to check the value; it's always URI safe. */
    if (ALLOW_DATA_ATTR && DATA_ATTR$$1.test(lcName)) {
      // This attribute is safe
    } else if (ALLOW_ARIA_ATTR && ARIA_ATTR$$1.test(lcName)) {
      // This attribute is safe
      /* Otherwise, check the name is permitted */
    } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
      return false;

      /* Check value is safe. First, is attr inert? If so, is safe */
    } else if (URI_SAFE_ATTRIBUTES[lcName]) {
      // This attribute is safe
      /* Check no script, data or unknown possibly unsafe URI
        unless we know URI values are safe for that attribute */
    } else if (IS_ALLOWED_URI$$1.test(value.replace(ATTR_WHITESPACE$$1, ''))) {
      // This attribute is safe
      /* Keep image data URIs alive if src/xlink:href is allowed */
    } else if ((lcName === 'src' || lcName === 'xlink:href') && value.indexOf('data:') === 0 && DATA_URI_TAGS[lcTag]) {
      // This attribute is safe
      /* Allow unknown protocols: This provides support for links that
        are handled by protocol handlers which may be unknown ahead of
        time, e.g. fb:, spotify: */
    } else if (ALLOW_UNKNOWN_PROTOCOLS && !IS_SCRIPT_OR_DATA$$1.test(value.replace(ATTR_WHITESPACE$$1, ''))) {
      // This attribute is safe
      /* Check for binary attributes */
      // eslint-disable-next-line no-negated-condition
    } else if (!value) {
      // Binary attributes are safe at this point
      /* Anything else, presume unsafe, do not add it back */
    } else {
      return false;
    }
    return true;
  };

  /**
   * _sanitizeAttributes
   *
   * @protect attributes
   * @protect nodeName
   * @protect removeAttribute
   * @protect setAttribute
   *
   * @param  {Node} node to sanitize
   */
  // eslint-disable-next-line complexity
  var _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
    var attr = void 0;
    var value = void 0;
    var lcName = void 0;
    var idAttr = void 0;
    var l = void 0;
    /* Execute a hook if present */
    _executeHook('beforeSanitizeAttributes', currentNode, null);

    var attributes = currentNode.attributes;

    /* Check if we have attributes; if not we might have a text node */

    if (!attributes) {
      return;
    }

    var hookEvent = {
      attrName: '',
      attrValue: '',
      keepAttr: true,
      allowedAttributes: ALLOWED_ATTR
    };
    l = attributes.length;

    /* Go backwards over all attributes; safely remove bad ones */
    while (l--) {
      attr = attributes[l];
      var _attr = attr,
          name = _attr.name;

      value = attr.value.trim();
      lcName = name.toLowerCase();

      /* Execute a hook if present */
      hookEvent.attrName = lcName;
      hookEvent.attrValue = value;
      hookEvent.keepAttr = true;
      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);
      value = hookEvent.attrValue;

      /* Remove attribute */
      // Safari (iOS + Mac), last tested v8.0.5, crashes if you try to
      // remove a "name" attribute from an <img> tag that has an "id"
      // attribute at the time.
      if (lcName === 'name' && currentNode.nodeName === 'IMG' && attributes.id) {
        idAttr = attributes.id;
        attributes = Array.prototype.slice.apply(attributes);
        _removeAttribute('id', currentNode);
        _removeAttribute(name, currentNode);
        if (attributes.indexOf(idAttr) > l) {
          currentNode.setAttribute('id', idAttr.value);
        }
      } else if (
      // This works around a bug in Safari, where input[type=file]
      // cannot be dynamically set after type has been removed
      currentNode.nodeName === 'INPUT' && lcName === 'type' && value === 'file' && (ALLOWED_ATTR[lcName] || !FORBID_ATTR[lcName])) {
        continue;
      } else {
        // This avoids a crash in Safari v9.0 with double-ids.
        // The trick is to first set the id to be empty and then to
        // remove the attribute
        if (name === 'id') {
          currentNode.setAttribute(name, '');
        }
        _removeAttribute(name, currentNode);
      }

      /* Did the hooks approve of the attribute? */
      if (!hookEvent.keepAttr) {
        continue;
      }

      /* Is `value` valid for this attribute? */
      var lcTag = currentNode.nodeName.toLowerCase();
      if (!_isValidAttribute(lcTag, lcName, value)) {
        continue;
      }

      /* Handle invalid data-* attribute set by try-catching it */
      try {
        currentNode.setAttribute(name, value);
        DOMPurify.removed.pop();
      } catch (err) {}
    }

    /* Execute a hook if present */
    _executeHook('afterSanitizeAttributes', currentNode, null);
  };

  /**
   * _sanitizeShadowDOM
   *
   * @param  {DocumentFragment} fragment to iterate over recursively
   */
  var _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
    var shadowNode = void 0;
    var shadowIterator = _createIterator(fragment);

    /* Execute a hook if present */
    _executeHook('beforeSanitizeShadowDOM', fragment, null);

    while (shadowNode = shadowIterator.nextNode()) {
      /* Execute a hook if present */
      _executeHook('uponSanitizeShadowNode', shadowNode, null);

      /* Sanitize tags and elements */
      if (_sanitizeElements(shadowNode)) {
        continue;
      }

      /* Deep shadow DOM detected */
      if (shadowNode.content instanceof DocumentFragment) {
        _sanitizeShadowDOM(shadowNode.content);
      }

      /* Check attributes, sanitize if necessary */
      _sanitizeAttributes(shadowNode);
    }

    /* Execute a hook if present */
    _executeHook('afterSanitizeShadowDOM', fragment, null);
  };

  /**
   * Sanitize
   * Public method providing core sanitation functionality
   *
   * @param {String|Node} dirty string or DOM node
   * @param {Object} configuration object
   */
  // eslint-disable-next-line complexity
  DOMPurify.sanitize = function (dirty, cfg) {
    var body = void 0;
    var importedNode = void 0;
    var currentNode = void 0;
    var oldNode = void 0;
    var returnNode = void 0;
    /* Make sure we have a string to sanitize.
      DO NOT return early, as this will return the wrong type if
      the user has requested a DOM object rather than a string */
    if (!dirty) {
      dirty = '<!-->';
    }

    /* Stringify, in case dirty is an object */
    if (typeof dirty !== 'string' && !_isNode(dirty)) {
      // eslint-disable-next-line no-negated-condition
      if (typeof dirty.toString !== 'function') {
        throw new TypeError('toString is not a function');
      } else {
        dirty = dirty.toString();
        if (typeof dirty !== 'string') {
          throw new TypeError('dirty is not a string, aborting');
        }
      }
    }

    /* Check we can run. Otherwise fall back or ignore */
    if (!DOMPurify.isSupported) {
      if (_typeof(window.toStaticHTML) === 'object' || typeof window.toStaticHTML === 'function') {
        if (typeof dirty === 'string') {
          return window.toStaticHTML(dirty);
        }
        if (_isNode(dirty)) {
          return window.toStaticHTML(dirty.outerHTML);
        }
      }
      return dirty;
    }

    /* Assign config vars */
    if (!SET_CONFIG) {
      _parseConfig(cfg);
    }

    /* Clean up removed elements */
    DOMPurify.removed = [];

    if (IN_PLACE) {
      /* No special handling necessary for in-place sanitization */
    } else if (dirty instanceof Node) {
      /* If dirty is a DOM element, append to an empty document to avoid
         elements being stripped by the parser */
      body = _initDocument('<!-->');
      importedNode = body.ownerDocument.importNode(dirty, true);
      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {
        /* Node is already a body, use as is */
        body = importedNode;
      } else {
        body.appendChild(importedNode);
      }
    } else {
      /* Exit directly if we have nothing to do */
      if (!RETURN_DOM && !WHOLE_DOCUMENT && dirty.indexOf('<') === -1) {
        return dirty;
      }

      /* Initialize the document to work on */
      body = _initDocument(dirty);

      /* Check we have a DOM node from the data */
      if (!body) {
        return RETURN_DOM ? null : '';
      }
    }

    /* Remove first element node (ours) if FORCE_BODY is set */
    if (body && FORCE_BODY) {
      _forceRemove(body.firstChild);
    }

    /* Get node iterator */
    var nodeIterator = _createIterator(IN_PLACE ? dirty : body);

    /* Now start iterating over the created document */
    while (currentNode = nodeIterator.nextNode()) {
      /* Fix IE's strange behavior with manipulated textNodes #89 */
      if (currentNode.nodeType === 3 && currentNode === oldNode) {
        continue;
      }

      /* Sanitize tags and elements */
      if (_sanitizeElements(currentNode)) {
        continue;
      }

      /* Shadow DOM detected, sanitize it */
      if (currentNode.content instanceof DocumentFragment) {
        _sanitizeShadowDOM(currentNode.content);
      }

      /* Check attributes, sanitize if necessary */
      _sanitizeAttributes(currentNode);

      oldNode = currentNode;
    }

    /* If we sanitized `dirty` in-place, return it. */
    if (IN_PLACE) {
      return dirty;
    }

    /* Return sanitized string or DOM */
    if (RETURN_DOM) {
      if (RETURN_DOM_FRAGMENT) {
        returnNode = createDocumentFragment.call(body.ownerDocument);

        while (body.firstChild) {
          returnNode.appendChild(body.firstChild);
        }
      } else {
        returnNode = body;
      }

      if (RETURN_DOM_IMPORT) {
        /* AdoptNode() is not used because internal state is not reset
               (e.g. the past names map of a HTMLFormElement), this is safe
               in theory but we would rather not risk another attack vector.
               The state that is cloned by importNode() is explicitly defined
               by the specs. */
        returnNode = importNode.call(originalDocument, returnNode, true);
      }

      return returnNode;
    }

    return WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
  };

  /**
   * Public method to set the configuration once
   * setConfig
   *
   * @param {Object} cfg configuration object
   */
  DOMPurify.setConfig = function (cfg) {
    _parseConfig(cfg);
    SET_CONFIG = true;
  };

  /**
   * Public method to remove the configuration
   * clearConfig
   *
   */
  DOMPurify.clearConfig = function () {
    CONFIG = null;
    SET_CONFIG = false;
  };

  /**
   * Public method to check if an attribute value is valid.
   * Uses last set config, if any. Otherwise, uses config defaults.
   * isValidAttribute
   *
   * @param  {string} tag Tag name of containing element.
   * @param  {string} attr Attribute name.
   * @param  {string} value Attribute value.
   * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.
   */
  DOMPurify.isValidAttribute = function (tag, attr, value) {
    /* Initialize shared config vars if necessary. */
    if (!CONFIG) {
      _parseConfig({});
    }
    var lcTag = tag.toLowerCase();
    var lcName = attr.toLowerCase();
    return _isValidAttribute(lcTag, lcName, value);
  };

  /**
   * AddHook
   * Public method to add DOMPurify hooks
   *
   * @param {String} entryPoint entry point for the hook to add
   * @param {Function} hookFunction function to execute
   */
  DOMPurify.addHook = function (entryPoint, hookFunction) {
    if (typeof hookFunction !== 'function') {
      return;
    }
    hooks[entryPoint] = hooks[entryPoint] || [];
    hooks[entryPoint].push(hookFunction);
  };

  /**
   * RemoveHook
   * Public method to remove a DOMPurify hook at a given entryPoint
   * (pops it from the stack of hooks if more are present)
   *
   * @param {String} entryPoint entry point for the hook to remove
   */
  DOMPurify.removeHook = function (entryPoint) {
    if (hooks[entryPoint]) {
      hooks[entryPoint].pop();
    }
  };

  /**
   * RemoveHooks
   * Public method to remove all DOMPurify hooks at a given entryPoint
   *
   * @param  {String} entryPoint entry point for the hooks to remove
   */
  DOMPurify.removeHooks = function (entryPoint) {
    if (hooks[entryPoint]) {
      hooks[entryPoint] = [];
    }
  };

  /**
   * RemoveAllHooks
   * Public method to remove all DOMPurify hooks
   *
   */
  DOMPurify.removeAllHooks = function () {
    hooks = {};
  };

  return DOMPurify;
}

var purify = createDOMPurify();

return purify;

})));/*!
 * bootstrap-fileinput v5.0.8
 * http://plugins.krajee.com/file-input
 *
 * Author: Kartik Visweswaran
 * Copyright: 2014 - 2019, Kartik Visweswaran, Krajee.com
 *
 * Licensed under the BSD-3-Clause
 * https://github.com/kartik-v/bootstrap-fileinput/blob/master/LICENSE.md
 */
(function (factory) {
    'use strict';
    //noinspection JSUnresolvedVariable
    if (typeof define === 'function' && define.amd) { // jshint ignore:line
        // AMD. Register as an anonymous module.
        define(['jquery'], factory); // jshint ignore:line
    } else { // noinspection JSUnresolvedVariable
        if (typeof module === 'object' && module.exports) { // jshint ignore:line
            // Node/CommonJS
            // noinspection JSUnresolvedVariable
            module.exports = factory(require('jquery')); // jshint ignore:line
        } else {
            // Browser globals
            factory(window.jQuery);
        }
    }
}(function ($) {
    'use strict';

    $.fn.fileinputLocales = {};
    $.fn.fileinputThemes = {};

    String.prototype.setTokens = function (replacePairs) {
        var str = this.toString(), key, re;
        for (key in replacePairs) {
            if (replacePairs.hasOwnProperty(key)) {
                re = new RegExp('\{' + key + '\}', 'g');
                str = str.replace(re, replacePairs[key]);
            }
        }
        return str;
    };

    var $h, FileInput;

    // fileinput helper object for all global variables and internal helper methods
    //noinspection JSUnresolvedVariable
    $h = {
        FRAMES: '.kv-preview-thumb',
        SORT_CSS: 'file-sortable',
        INIT_FLAG: 'init-',
        OBJECT_PARAMS: '<param name="controller" value="true" />\n' +
            '<param name="allowFullScreen" value="true" />\n' +
            '<param name="allowScriptAccess" value="always" />\n' +
            '<param name="autoPlay" value="false" />\n' +
            '<param name="autoStart" value="false" />\n' +
            '<param name="quality" value="high" />\n',
        DEFAULT_PREVIEW: '<div class="file-preview-other">\n' +
            '<span class="{previewFileIconClass}">{previewFileIcon}</span>\n' +
            '</div>',
        MODAL_ID: 'kvFileinputModal',
        MODAL_EVENTS: ['show', 'shown', 'hide', 'hidden', 'loaded'],
        logMessages: {
            ajaxError: '{status}: {error}. Error Details: {text}.',
            badDroppedFiles: 'Error scanning dropped files!',
            badExifParser: 'Error loading the piexif.js library. {details}',
            badInputType: 'The input "type" must be set to "file" for initializing the "bootstrap-fileinput" plugin.',
            exifWarning: 'To avoid this warning, either set "autoOrientImage" to "false" OR ensure you have loaded ' +
                'the "piexif.js" library correctly on your page before the "fileinput.js" script.',
            invalidChunkSize: 'Invalid upload chunk size: "{chunkSize}". Resumable uploads are disabled.',
            invalidThumb: 'Invalid thumb frame with id: "{id}".',
            noResumableSupport: 'The browser does not support resumable or chunk uploads.',
            noUploadUrl: 'The "uploadUrl" is not set. Ajax uploads and resumable uploads have been disabled.',
            retryStatus: 'Retrying upload for chunk # {chunk} for {filename}... retry # {retry}.'
        },
        objUrl: window.URL || window.webkitURL,
        now: function () {
            return new Date();
        },
        round: function (num) {
            num = parseFloat(num);
            return isNaN(num) ? 0 : Math.floor(Math.round(num));
        },
        getFileRelativePath: function (file) {
            /** @namespace file.relativePath */
            /** @namespace file.webkitRelativePath */
            return String(file.relativePath || file.webkitRelativePath || $h.getFileName(file) || null);

        },
        getFileId: function (file, generateFileId) {
            var relativePath = $h.getFileRelativePath(file);
            if (typeof generateFileId === 'function') {
                return generateFileId(file);
            }
            if (!file) {
                return null;
            }
            if (!relativePath) {
                return null;
            }
            return (file.size + '_' + relativePath.replace(/\s/img, '_'));
        },
        getFrameSelector: function (id, selector) {
            selector = selector || '';
            return '[id="' + id + '"]' + selector;
        },
        getZoomSelector: function (id, selector) {
            selector = selector || '';
            return '[id="zoom-' + id + '"]' + selector;
        },
        getFrameElement: function ($element, id, selector) {
            return $element.find($h.getFrameSelector(id, selector));
        },
        getZoomElement: function ($element, id, selector) {
            return $element.find($h.getZoomSelector(id, selector));
        },
        getElapsed: function (seconds) {
            var delta = seconds, out = '', result = {}, structure = {
                year: 31536000,
                month: 2592000,
                week: 604800, // uncomment row to ignore
                day: 86400,   // feel free to add your own row
                hour: 3600,
                minute: 60,
                second: 1
            };
            Object.keys(structure).forEach(function (key) {
                result[key] = Math.floor(delta / structure[key]);
                delta -= result[key] * structure[key];
            });
            $.each(result, function (key, value) {
                if (value > 0) {
                    out += (out ? ' ' : '') + value + key.substring(0, 1);
                }
            });
            return out;
        },
        debounce: function (func, delay) {
            var inDebounce;
            return function () {
                var args = arguments, context = this;
                clearTimeout(inDebounce);
                inDebounce = setTimeout(function () {
                    func.apply(context, args);
                }, delay);
            };
        },
        stopEvent: function (e) {
            e.stopPropagation();
            e.preventDefault();
        },
        getFileName: function (file) {
            /** @namespace file.fileName */
            return file ? (file.fileName || file.name || '') : ''; // some confusion in different versions of Firefox
        },
        createObjectURL: function (data) {
            if ($h.objUrl && $h.objUrl.createObjectURL && data) {
                return $h.objUrl.createObjectURL(data);
            }
            return '';
        },
        revokeObjectURL: function (data) {
            if ($h.objUrl && $h.objUrl.revokeObjectURL && data) {
                $h.objUrl.revokeObjectURL(data);
            }
        },
        compare: function (input, str, exact) {
            return input !== undefined && (exact ? input === str : input.match(str));
        },
        isIE: function (ver) {
            var div, status;
            // check for IE versions < 11
            if (navigator.appName !== 'Microsoft Internet Explorer') {
                return false;
            }
            if (ver === 10) {
                return new RegExp('msie\\s' + ver, 'i').test(navigator.userAgent);
            }
            div = document.createElement('div');
            div.innerHTML = '<!--[if IE ' + ver + ']> <i></i> <![endif]-->';
            status = div.getElementsByTagName('i').length;
            document.body.appendChild(div);
            div.parentNode.removeChild(div);
            return status;
        },
        canAssignFilesToInput: function () {
            var input = document.createElement('input');
            try {
                input.type = 'file';
                input.files = null;
                return true;
            } catch (err) {
                return false;
            }
        },
        getDragDropFolders: function (items) {
            var i, item, len = items ? items.length : 0, folders = 0;
            if (len > 0 && items[0].webkitGetAsEntry()) {
                for (i = 0; i < len; i++) {
                    item = items[i].webkitGetAsEntry();
                    if (item && item.isDirectory) {
                        folders++;
                    }
                }
            }
            return folders;
        },
        initModal: function ($modal) {
            var $body = $('body');
            if ($body.length) {
                $modal.appendTo($body);
            }
        },
        isFunction: function (v) {
            return typeof v === 'function';
        },
        isEmpty: function (value, trim) {
            return value === undefined || value === null || (!$h.isFunction(
                value) && (value.length === 0 || (trim && $.trim(value) === '')));
        },
        isArray: function (a) {
            return Array.isArray(a) || Object.prototype.toString.call(a) === '[object Array]';
        },
        ifSet: function (needle, haystack, def) {
            def = def || '';
            return (haystack && typeof haystack === 'object' && needle in haystack) ? haystack[needle] : def;
        },
        cleanArray: function (arr) {
            if (!(arr instanceof Array)) {
                arr = [];
            }
            return arr.filter(function (e) {
                return (e !== undefined && e !== null);
            });
        },
        spliceArray: function (arr, index, reverseOrder) {
            var i, j = 0, out = [], newArr;
            if (!(arr instanceof Array)) {
                return [];
            }
            newArr = $.extend(true, [], arr);
            if (reverseOrder) {
                newArr.reverse();
            }
            for (i = 0; i < newArr.length; i++) {
                if (i !== index) {
                    out[j] = newArr[i];
                    j++;
                }
            }
            if (reverseOrder) {
                out.reverse();
            }
            return out;
        },
        getNum: function (num, def) {
            def = def || 0;
            if (typeof num === 'number') {
                return num;
            }
            if (typeof num === 'string') {
                num = parseFloat(num);
            }
            return isNaN(num) ? def : num;
        },
        hasFileAPISupport: function () {
            return !!(window.File && window.FileReader);
        },
        hasDragDropSupport: function () {
            var div = document.createElement('div');
            /** @namespace div.draggable */
            /** @namespace div.ondragstart */
            /** @namespace div.ondrop */
            return !$h.isIE(9) &&
                (div.draggable !== undefined || (div.ondragstart !== undefined && div.ondrop !== undefined));
        },
        hasFileUploadSupport: function () {
            return $h.hasFileAPISupport() && window.FormData;
        },
        hasBlobSupport: function () {
            try {
                return !!window.Blob && Boolean(new Blob());
            } catch (e) {
                return false;
            }
        },
        hasArrayBufferViewSupport: function () {
            try {
                return new Blob([new Uint8Array(100)]).size === 100;
            } catch (e) {
                return false;
            }
        },
        hasResumableUploadSupport: function () {
            /** @namespace Blob.prototype.webkitSlice */
            /** @namespace Blob.prototype.mozSlice */
            return $h.hasFileUploadSupport() && $h.hasBlobSupport() && $h.hasArrayBufferViewSupport() &&
                (!!Blob.prototype.webkitSlice || !!Blob.prototype.mozSlice || !!Blob.prototype.slice || false);
        },
        dataURI2Blob: function (dataURI) {
            //noinspection JSUnresolvedVariable
            var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder ||
                window.MSBlobBuilder, canBlob = $h.hasBlobSupport(), byteStr, arrayBuffer, intArray, i, mimeStr, bb,
                canProceed = (canBlob || BlobBuilder) && window.atob && window.ArrayBuffer && window.Uint8Array;
            if (!canProceed) {
                return null;
            }
            if (dataURI.split(',')[0].indexOf('base64') >= 0) {
                byteStr = atob(dataURI.split(',')[1]);
            } else {
                byteStr = decodeURIComponent(dataURI.split(',')[1]);
            }
            arrayBuffer = new ArrayBuffer(byteStr.length);
            intArray = new Uint8Array(arrayBuffer);
            for (i = 0; i < byteStr.length; i += 1) {
                intArray[i] = byteStr.charCodeAt(i);
            }
            mimeStr = dataURI.split(',')[0].split(':')[1].split(';')[0];
            if (canBlob) {
                return new Blob([$h.hasArrayBufferViewSupport() ? intArray : arrayBuffer], {type: mimeStr});
            }
            bb = new BlobBuilder();
            bb.append(arrayBuffer);
            return bb.getBlob(mimeStr);
        },
        arrayBuffer2String: function (buffer) {
            //noinspection JSUnresolvedVariable
            if (window.TextDecoder) {
                // noinspection JSUnresolvedFunction
                return new TextDecoder('utf-8').decode(buffer);
            }
            var array = Array.prototype.slice.apply(new Uint8Array(buffer)), out = '', i = 0, len, c, char2, char3;
            len = array.length;
            while (i < len) {
                c = array[i++];
                switch (c >> 4) { // jshint ignore:line
                    case 0:
                    case 1:
                    case 2:
                    case 3:
                    case 4:
                    case 5:
                    case 6:
                    case 7:
                        // 0xxxxxxx
                        out += String.fromCharCode(c);
                        break;
                    case 12:
                    case 13:
                        // 110x xxxx   10xx xxxx
                        char2 = array[i++];
                        out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); // jshint ignore:line
                        break;
                    case 14:
                        // 1110 xxxx  10xx xxxx  10xx xxxx
                        char2 = array[i++];
                        char3 = array[i++];
                        out += String.fromCharCode(((c & 0x0F) << 12) | // jshint ignore:line
                            ((char2 & 0x3F) << 6) |  // jshint ignore:line
                            ((char3 & 0x3F) << 0)); // jshint ignore:line
                        break;
                }
            }
            return out;
        },
        isHtml: function (str) {
            var a = document.createElement('div');
            a.innerHTML = str;
            for (var c = a.childNodes, i = c.length; i--;) {
                if (c[i].nodeType === 1) {
                    return true;
                }
            }
            return false;
        },
        isSvg: function (str) {
            return str.match(/^\s*<\?xml/i) && (str.match(/<!DOCTYPE svg/i) || str.match(/<svg/i));
        },
        getMimeType: function (signature, contents, type) {
            switch (signature) {
                case 'ffd8ffe0':
                case 'ffd8ffe1':
                case 'ffd8ffe2':
                    return 'image/jpeg';
                case '89504E47':
                    return 'image/png';
                case '47494638':
                    return 'image/gif';
                case '49492a00':
                    return 'image/tiff';
                case '52494646':
                    return 'image/webp';
                case '66747970':
                    return 'video/3gp';
                case '4f676753':
                    return 'video/ogg';
                case '1a45dfa3':
                    return 'video/mkv';
                case '000001ba':
                case '000001b3':
                    return 'video/mpeg';
                case '3026b275':
                    return 'video/wmv';
                case '25504446':
                    return 'application/pdf';
                case '25215053':
                    return 'application/ps';
                case '504b0304':
                case '504b0506':
                case '504b0508':
                    return 'application/zip';
                case '377abcaf':
                    return 'application/7z';
                case '75737461':
                    return 'application/tar';
                case '7801730d':
                    return 'application/dmg';
                default:
                    switch (signature.substring(0, 6)) {
                        case '435753':
                            return 'application/x-shockwave-flash';
                        case '494433':
                            return 'audio/mp3';
                        case '425a68':
                            return 'application/bzip';
                        default:
                            switch (signature.substring(0, 4)) {
                                case '424d':
                                    return 'image/bmp';
                                case 'fffb':
                                    return 'audio/mp3';
                                case '4d5a':
                                    return 'application/exe';
                                case '1f9d':
                                case '1fa0':
                                    return 'application/zip';
                                case '1f8b':
                                    return 'application/gzip';
                                default:
                                    return contents && !contents.match(
                                        /[^\u0000-\u007f]/) ? 'application/text-plain' : type;
                            }
                    }
            }
        },
        addCss: function ($el, css) {
            $el.removeClass(css).addClass(css);
        },
        getElement: function (options, param, value) {
            return ($h.isEmpty(options) || $h.isEmpty(options[param])) ? value : $(options[param]);
        },
        uniqId: function () {
            return Math.round(new Date().getTime()) + '_' + Math.round(Math.random() * 100);
        },
        htmlEncode: function (str, undefVal) {
            if (str === undefined) {
                return undefVal || null;
            }
            return str.replace(/&/g, '&amp;')
                .replace(/</g, '&lt;')
                .replace(/>/g, '&gt;')
                .replace(/"/g, '&quot;')
                .replace(/'/g, '&apos;');
        },
        replaceTags: function (str, tags) {
            var out = str;
            if (!tags) {
                return out;
            }
            $.each(tags, function (key, value) {
                if (typeof value === 'function') {
                    value = value();
                }
                out = out.split(key).join(value);
            });
            return out;
        },
        cleanMemory: function ($thumb) {
            var data = $thumb.is('img') ? $thumb.attr('src') : $thumb.find('source').attr('src');
            $h.revokeObjectURL(data);
        },
        findFileName: function (filePath) {
            var sepIndex = filePath.lastIndexOf('/');
            if (sepIndex === -1) {
                sepIndex = filePath.lastIndexOf('\\');
            }
            return filePath.split(filePath.substring(sepIndex, sepIndex + 1)).pop();
        },
        checkFullScreen: function () {
            //noinspection JSUnresolvedVariable
            return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement ||
                document.msFullscreenElement;
        },
        toggleFullScreen: function (maximize) {
            var doc = document, de = doc.documentElement;
            if (de && maximize && !$h.checkFullScreen()) {
                /** @namespace document.requestFullscreen */
                /** @namespace document.msRequestFullscreen */
                /** @namespace document.mozRequestFullScreen */
                /** @namespace document.webkitRequestFullscreen */
                /** @namespace Element.ALLOW_KEYBOARD_INPUT */
                if (de.requestFullscreen) {
                    de.requestFullscreen();
                } else {
                    if (de.msRequestFullscreen) {
                        de.msRequestFullscreen();
                    } else {
                        if (de.mozRequestFullScreen) {
                            de.mozRequestFullScreen();
                        } else {
                            if (de.webkitRequestFullscreen) {
                                de.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
                            }
                        }
                    }
                }
            } else {
                /** @namespace document.exitFullscreen */
                /** @namespace document.msExitFullscreen */
                /** @namespace document.mozCancelFullScreen */
                /** @namespace document.webkitExitFullscreen */
                if (doc.exitFullscreen) {
                    doc.exitFullscreen();
                } else {
                    if (doc.msExitFullscreen) {
                        doc.msExitFullscreen();
                    } else {
                        if (doc.mozCancelFullScreen) {
                            doc.mozCancelFullScreen();
                        } else {
                            if (doc.webkitExitFullscreen) {
                                doc.webkitExitFullscreen();
                            }
                        }
                    }
                }
            }
        },
        moveArray: function (arr, oldIndex, newIndex, reverseOrder) {
            var newArr = $.extend(true, [], arr);
            if (reverseOrder) {
                newArr.reverse();
            }
            if (newIndex >= newArr.length) {
                var k = newIndex - newArr.length;
                while ((k--) + 1) {
                    newArr.push(undefined);
                }
            }
            newArr.splice(newIndex, 0, newArr.splice(oldIndex, 1)[0]);
            if (reverseOrder) {
                newArr.reverse();
            }
            return newArr;
        },
        cleanZoomCache: function ($el) {
            var $cache = $el.closest('.kv-zoom-cache-theme');
            if (!$cache.length) {
                $cache = $el.closest('.kv-zoom-cache');
            }
            $cache.remove();
        },
        closeButton: function (css) {
            css = css ? 'close ' + css : 'close';
            return '<button type="button" class="' + css + '" aria-label="Close">\n' +
                '  <span aria-hidden="true">&times;</span>\n' +
                '</button>';
        },
        getRotation: function (value) {
            switch (value) {
                case 2:
                    return 'rotateY(180deg)';
                case 3:
                    return 'rotate(180deg)';
                case 4:
                    return 'rotate(180deg) rotateY(180deg)';
                case 5:
                    return 'rotate(270deg) rotateY(180deg)';
                case 6:
                    return 'rotate(90deg)';
                case 7:
                    return 'rotate(90deg) rotateY(180deg)';
                case 8:
                    return 'rotate(270deg)';
                default:
                    return '';
            }
        },
        setTransform: function (el, val) {
            if (!el) {
                return;
            }
            el.style.transform = val;
            el.style.webkitTransform = val;
            el.style['-moz-transform'] = val;
            el.style['-ms-transform'] = val;
            el.style['-o-transform'] = val;
        }
    };
    FileInput = function (element, options) {
        var self = this;
        self.$element = $(element);
        self.$parent = self.$element.parent();
        if (!self._validate()) {
            return;
        }
        self.isPreviewable = $h.hasFileAPISupport();
        self.isIE9 = $h.isIE(9);
        self.isIE10 = $h.isIE(10);
        if (self.isPreviewable || self.isIE9) {
            self._init(options);
            self._listen();
        }
        self.$element.removeClass('file-loading');
    };
    //noinspection JSUnusedGlobalSymbols
    FileInput.prototype = {
        constructor: FileInput,
        _cleanup: function () {
            var self = this;
            self.reader = null;
            self.clearFileStack();
            self.fileBatchCompleted = true;
            self.isError = false;
            self.cancelling = false;
            self.paused = false;
            self.lastProgress = 0;
            self._initAjax();
        },
        _initAjax: function () {
            var self = this;
            self.ajaxQueue = [];
            self.ajaxRequests = [];
            self.ajaxQueueIntervalId = null;
            self.ajaxCurrentThreads = 0;
            self.ajaxAborted = false;
        },
        _init: function (options, refreshMode) {
            var self = this, f, $el = self.$element, $cont, t, tmp;
            self.options = options;
            $.each(options, function (key, value) {
                switch (key) {
                    case 'minFileCount':
                    case 'maxFileCount':
                    case 'maxTotalFileCount':
                    case 'minFileSize':
                    case 'maxFileSize':
                    case 'maxFilePreviewSize':
                    case 'resizeImageQuality':
                    case 'resizeIfSizeMoreThan':
                    case 'progressUploadThreshold':
                    case 'initialPreviewCount':
                    case 'zoomModalHeight':
                    case 'minImageHeight':
                    case 'maxImageHeight':
                    case 'minImageWidth':
                    case 'maxImageWidth':
                        self[key] = $h.getNum(value);
                        break;
                    default:
                        self[key] = value;
                        break;
                }
            });
            if (self.maxTotalFileCount > 0 && self.maxTotalFileCount < self.maxFileCount) {
                self.maxTotalFileCount = self.maxFileCount;
            }
            if (self.rtl) { // swap buttons for rtl
                tmp = self.previewZoomButtonIcons.prev;
                self.previewZoomButtonIcons.prev = self.previewZoomButtonIcons.next;
                self.previewZoomButtonIcons.next = tmp;
            }
            // validate chunk threads to not exceed maxAjaxThreads
            if (!isNaN(self.maxAjaxThreads) && self.maxAjaxThreads < self.resumableUploadOptions.maxThreads) {
                self.resumableUploadOptions.maxThreads = self.maxAjaxThreads;
            }
            self._initFileManager();
            if (typeof self.autoOrientImage === 'function') {
                self.autoOrientImage = self.autoOrientImage();
            }
            if (typeof self.autoOrientImageInitial === 'function') {
                self.autoOrientImageInitial = self.autoOrientImageInitial();
            }
            if (!refreshMode) {
                self._cleanup();
            }
            self.duplicateErrors = [];
            self.$form = $el.closest('form');
            self._initTemplateDefaults();
            self.uploadFileAttr = !$h.isEmpty($el.attr('name')) ? $el.attr('name') : 'file_data';
            t = self._getLayoutTemplate('progress');
            self.progressTemplate = t.replace('{class}', self.progressClass);
            self.progressInfoTemplate = t.replace('{class}', self.progressInfoClass);
            self.progressPauseTemplate = t.replace('{class}', self.progressPauseClass);
            self.progressCompleteTemplate = t.replace('{class}', self.progressCompleteClass);
            self.progressErrorTemplate = t.replace('{class}', self.progressErrorClass);
            self.isDisabled = $el.attr('disabled') || $el.attr('readonly');
            if (self.isDisabled) {
                $el.attr('disabled', true);
            }
            self.isClickable = self.browseOnZoneClick && self.showPreview &&
                (self.dropZoneEnabled || !$h.isEmpty(self.defaultPreviewContent));
            self.isAjaxUpload = $h.hasFileUploadSupport() && !$h.isEmpty(self.uploadUrl);
            self.dropZoneEnabled = $h.hasDragDropSupport() && self.dropZoneEnabled;
            if (!self.isAjaxUpload) {
                self.dropZoneEnabled = self.dropZoneEnabled && $h.canAssignFilesToInput();
            }
            self.slug = typeof options.slugCallback === 'function' ? options.slugCallback : self._slugDefault;
            self.mainTemplate = self.showCaption ? self._getLayoutTemplate('main1') : self._getLayoutTemplate('main2');
            self.captionTemplate = self._getLayoutTemplate('caption');
            self.previewGenericTemplate = self._getPreviewTemplate('generic');
            if (!self.imageCanvas && self.resizeImage && (self.maxImageWidth || self.maxImageHeight)) {
                self.imageCanvas = document.createElement('canvas');
                self.imageCanvasContext = self.imageCanvas.getContext('2d');
            }
            if ($h.isEmpty($el.attr('id'))) {
                $el.attr('id', $h.uniqId());
            }
            self.namespace = '.fileinput_' + $el.attr('id').replace(/-/g, '_');
            if (self.$container === undefined) {
                self.$container = self._createContainer();
            } else {
                self._refreshContainer();
            }
            $cont = self.$container;
            self.$dropZone = $cont.find('.file-drop-zone');
            self.$progress = $cont.find('.kv-upload-progress');
            self.$btnUpload = $cont.find('.fileinput-upload');
            self.$captionContainer = $h.getElement(options, 'elCaptionContainer', $cont.find('.file-caption'));
            self.$caption = $h.getElement(options, 'elCaptionText', $cont.find('.file-caption-name'));
            if (!$h.isEmpty(self.msgPlaceholder)) {
                f = $el.attr('multiple') ? self.filePlural : self.fileSingle;
                self.$caption.attr('placeholder', self.msgPlaceholder.replace('{files}', f));
            }
            self.$captionIcon = self.$captionContainer.find('.file-caption-icon');
            self.$previewContainer = $h.getElement(options, 'elPreviewContainer', $cont.find('.file-preview'));
            self.$preview = $h.getElement(options, 'elPreviewImage', $cont.find('.file-preview-thumbnails'));
            self.$previewStatus = $h.getElement(options, 'elPreviewStatus', $cont.find('.file-preview-status'));
            self.$errorContainer = $h.getElement(options, 'elErrorContainer',
                self.$previewContainer.find('.kv-fileinput-error'));
            self._validateDisabled();
            if (!$h.isEmpty(self.msgErrorClass)) {
                $h.addCss(self.$errorContainer, self.msgErrorClass);
            }
            if (!refreshMode) {
                self.$errorContainer.hide();
                self.previewInitId = 'thumb-' + $el.attr('id');
                self._initPreviewCache();
                self._initPreview(true);
                self._initPreviewActions();
                if (self.$parent.hasClass('file-loading')) {
                    self.$container.insertBefore(self.$parent);
                    self.$parent.remove();
                }
            } else {
                if (!self._errorsExist()) {
                    self.$errorContainer.hide();
                }
            }
            self._setFileDropZoneTitle();
            if ($el.attr('disabled')) {
                self.disable();
            }
            self._initZoom();
            if (self.hideThumbnailContent) {
                $h.addCss(self.$preview, 'hide-content');
            }
        },
        _initFileManager: function () {
            var self = this;
            self.fileManager = {
                stack: {},
                processed: [],
                errors: [],
                loadedImages: {},
                totalImages: 0,
                totalFiles: null,
                totalSize: null,
                uploadedSize: 0,
                stats: {},
                initStats: function (id) {
                    var data = {started: $h.now().getTime()};
                    if (id) {
                        self.fileManager.stats[id] = data;
                    } else {
                        self.fileManager.stats = data;
                    }
                },
                getUploadStats: function (id, loaded, total) {
                    var fm = self.fileManager, started = id ? fm.stats[id] && fm.stats[id].started || null : null;
                    if (!started) {
                        started = $h.now().getTime();
                    }
                    var elapsed = ($h.now().getTime() - started) / 1000,
                        speeds = ['B/s', 'KB/s', 'MB/s', 'GB/s', 'TB/s', 'PB/s', 'EB/s', 'ZB/s', 'YB/s'],
                        bps = elapsed ? loaded / elapsed : 0, bitrate = self._getSize(bps, speeds),
                        pendingBytes = total - loaded,
                        out = {
                            fileId: id,
                            started: started,
                            elapsed: elapsed,
                            loaded: loaded,
                            total: total,
                            bps: bps,
                            bitrate: bitrate,
                            pendingBytes: pendingBytes
                        };
                    if (id) {
                        fm.stats[id] = out;
                    } else {
                        fm.stats = out;
                    }
                    return out;
                },
                exists: function (id) {
                    return $.inArray(id, self.fileManager.getIdList()) !== -1;
                },
                count: function () {
                    return self.fileManager.getIdList().length;
                },
                total: function () {
                    var fm = self.fileManager;
                    if (!fm.totalFiles) {
                        fm.totalFiles = fm.count();
                    }
                    return fm.totalFiles;
                },
                getTotalSize: function () {
                    var fm = self.fileManager;
                    if (fm.totalSize) {
                        return fm.totalSize;
                    }
                    fm.totalSize = 0;
                    $.each(self.fileManager.stack, function (id, f) {
                        var size = parseFloat(f.size);
                        fm.totalSize += isNaN(size) ? 0 : size;
                    });
                    return fm.totalSize;
                },
                add: function (file, id) {
                    if (!id) {
                        id = self.fileManager.getId(file);
                    }
                    if (!id) {
                        return;
                    }
                    self.fileManager.stack[id] = {
                        file: file,
                        name: $h.getFileName(file),
                        relativePath: $h.getFileRelativePath(file),
                        size: file.size,
                        nameFmt: self._getFileName(file, ''),
                        sizeFmt: self._getSize(file.size)
                    };
                },
                remove: function ($thumb) {
                    var id = $thumb.attr('data-fileid');
                    if (id) {
                        self.fileManager.removeFile(id);
                    }
                },
                removeFile: function (id) {
                    delete self.fileManager.stack[id];
                    delete self.fileManager.loadedImages[id];
                },
                move: function (idFrom, idTo) {
                    var result = {}, stack = self.fileManager.stack;
                    if (!idFrom && !idTo || idFrom === idTo) {
                        return;
                    }
                    $.each(stack, function (k, v) {
                        if (k !== idFrom) {
                            result[k] = v;
                        }
                        if (k === idTo) {
                            result[idFrom] = stack[idFrom];
                        }
                    });
                    self.fileManager.stack = result;
                },
                list: function () {
                    var files = [];
                    $.each(self.fileManager.stack, function (k, v) {
                        if (v && v.file) {
                            files.push(v.file);
                        }
                    });
                    return files;
                },
                isPending: function (id) {
                    return $.inArray(id, self.fileManager.processed) === -1 && self.fileManager.exists(id);
                },
                isProcessed: function () {
                    var processed = true, fm = self.fileManager;
                    $.each(fm.stack, function (id) {
                        if (fm.isPending(id)) {
                            processed = false;
                        }
                    });
                    return processed;
                },
                clear: function () {
                    var fm = self.fileManager;
                    fm.totalFiles = null;
                    fm.totalSize = null;
                    fm.uploadedSize = 0;
                    fm.stack = {};
                    fm.errors = [];
                    fm.processed = [];
                    fm.stats = {};
                    fm.clearImages();
                },
                clearImages: function () {
                    self.fileManager.loadedImages = {};
                    self.fileManager.totalImages = 0;
                },
                addImage: function (id, config) {
                    self.fileManager.loadedImages[id] = config;
                },
                removeImage: function (id) {
                    delete self.fileManager.loadedImages[id];
                },
                getImageIdList: function () {
                    return Object.keys(self.fileManager.loadedImages);
                },
                getImageCount: function () {
                    return self.fileManager.getImageIdList().length;
                },
                getId: function (file) {
                    return self._getFileId(file);
                },
                getIndex: function (id) {
                    return self.fileManager.getIdList().indexOf(id);
                },
                getThumb: function (id) {
                    var $thumb = null;
                    self._getThumbs().each(function () {
                        var $t = $(this);
                        if ($t.attr('data-fileid') === id) {
                            $thumb = $t;
                        }
                    });
                    return $thumb;
                },
                getThumbIndex: function ($thumb) {
                    var id = $thumb.attr('data-fileid');
                    return self.fileManager.getIndex(id);
                },
                getIdList: function () {
                    return Object.keys(self.fileManager.stack);
                },
                getFile: function (id) {
                    return self.fileManager.stack[id] || null;
                },
                getFileName: function (id, fmt) {
                    var file = self.fileManager.getFile(id);
                    if (!file) {
                        return '';
                    }
                    return fmt ? (file.nameFmt || '') : file.name || '';
                },
                getFirstFile: function () {
                    var ids = self.fileManager.getIdList(), id = ids && ids.length ? ids[0] : null;
                    return self.fileManager.getFile(id);
                },
                setFile: function (id, file) {
                    if (self.fileManager.getFile(id)) {
                        self.fileManager.stack[id].file = file;
                    } else {
                        self.fileManager.add(file, id);
                    }
                },
                setProcessed: function (id) {
                    self.fileManager.processed.push(id);
                },
                getProgress: function () {
                    var total = self.fileManager.total(), processed = self.fileManager.processed.length;
                    if (!total) {
                        return 0;
                    }
                    return Math.ceil(processed / total * 100);

                },
                setProgress: function (id, pct) {
                    var f = self.fileManager.getFile(id);
                    if (!isNaN(pct) && f) {
                        f.progress = pct;
                    }
                }
            };
        },
        _setUploadData: function (fd, config) {
            var self = this;
            $.each(config, function (key, value) {
                var param = self.uploadParamNames[key] || key;
                if ($h.isArray(value)) {
                    fd.append(param, value[0], value[1]);
                } else {
                    fd.append(param, value);
                }
            });
        },
        _initResumableUpload: function () {
            var self = this, opts = self.resumableUploadOptions, logs = $h.logMessages;
            if (!self.enableResumableUpload) {
                return;
            }
            if (opts.fallback !== false && typeof opts.fallback !== 'function') {
                opts.fallback = function (s) {
                    s._log(logs.noResumableSupport);
                    s.enableResumableUpload = false;
                };
            }
            if (!$h.hasResumableUploadSupport() && opts.fallback !== false) {
                opts.fallback(self);
                return;
            }
            if (!self.uploadUrl && self.enableResumableUpload) {
                self._log(logs.noUploadUrl);
                self.enableResumableUpload = false;
                return;

            }
            opts.chunkSize = parseFloat(opts.chunkSize);
            if (opts.chunkSize <= 0 || isNaN(opts.chunkSize)) {
                self._log(logs.invalidChunkSize, {chunkSize: opts.chunkSize});
                self.enableResumableUpload = false;
                return;
            }
            self.resumableManager = {
                init: function (id, f, index) {
                    var rm = self.resumableManager, fm = self.fileManager;
                    rm.currThreads = 0;
                    rm.logs = [];
                    rm.stack = [];
                    rm.error = '';
                    rm.chunkIntervalId = null;
                    rm.id = id;
                    rm.file = f.file;
                    rm.fileName = f.name;
                    rm.fileIndex = index;
                    rm.completed = false;
                    rm.testing = false;
                    rm.lastProgress = 0;
                    if (self.showPreview) {
                        rm.$thumb = fm.getThumb(id) || null;
                        rm.$progress = rm.$btnDelete = null;
                        if (rm.$thumb && rm.$thumb.length) {
                            rm.$progress = rm.$thumb.find('.file-thumb-progress');
                            rm.$btnDelete = rm.$thumb.find('.kv-file-remove');
                        }
                    }
                    rm.chunkSize = self.resumableUploadOptions.chunkSize * 1024;
                    rm.chunkCount = rm.getTotalChunks();
                },
                logAjaxError: function (jqXHR, textStatus, errorThrown) {
                    if (self.resumableUploadOptions.showErrorLog) {
                        self._log(logs.ajaxError, {
                            status: jqXHR.status,
                            error: errorThrown,
                            text: jqXHR.responseText || ''
                        });
                    }
                },
                reset: function () {
                    var rm = self.resumableManager;
                    rm.processed = {};
                },
                setProcessed: function (status) {
                    var rm = self.resumableManager, fm = self.fileManager, id = rm.id, msg,
                        $thumb = rm.$thumb, $prog = rm.$progress, hasThumb = $thumb && $thumb.length,
                        params = {id: hasThumb ? $thumb.attr('id') : '', index: fm.getIndex(id), fileId: id};
                    rm.completed = true;
                    rm.lastProgress = 0;
                    fm.uploadedSize += rm.file.size;
                    if (hasThumb) {
                        $thumb.removeClass('file-uploading');
                    }
                    if (status === 'success') {
                        if (self.showPreview) {
                            self._setProgress(101, $prog);
                            self._setThumbStatus($thumb, 'Success');
                            self._initUploadSuccess(rm.processed[id].data, $thumb);
                        }
                        self.fileManager.removeFile(id);
                        delete rm.processed[id];
                        self._raise('fileuploaded', [params.id, params.index, params.fileId]);
                        if (fm.isProcessed()) {
                            self._setProgress(101);
                        }
                    } else {
                        if (self.showPreview) {
                            self._setThumbStatus($thumb, 'Error');
                            self._setPreviewError($thumb, true);
                            self._setProgress(101, $prog, self.msgProgressError);
                            self._setProgress(101, self.$progress, self.msgProgressError);
                            self.cancelling = true;
                        }
                        if (!self.$errorContainer.find('li[data-file-id="' + params.fileId + '"]').length) {
                            msg = self.msgResumableUploadRetriesExceeded.setTokens({
                                file: rm.fileName,
                                max: self.resumableUploadOptions.maxRetries,
                                error: rm.error
                            });
                            self._showFileError(msg, params);
                        }
                    }
                    if (fm.isProcessed()) {
                        rm.reset();
                    }
                },
                check: function () {
                    var rm = self.resumableManager, status = true;
                    $.each(rm.logs, function (index, value) {
                        if (!value) {
                            status = false;
                            return false;
                        }
                    });
                    if (status) {
                        clearInterval(rm.chunkIntervalId);
                        rm.setProcessed('success');
                    }
                },
                processedResumables: function () {
                    var logs = self.resumableManager.logs, i, count = 0;
                    if (!logs || !logs.length) {
                        return 0;
                    }
                    for (i = 0; i < logs.length; i++) {
                        if (logs[i] === true) {
                            count++;
                        }
                    }
                    return count;
                },
                getUploadedSize: function () {
                    var rm = self.resumableManager, size = rm.processedResumables() * rm.chunkSize;
                    return size > rm.file.size ? rm.file.size : size;
                },
                getTotalChunks: function () {
                    var rm = self.resumableManager, chunkSize = parseFloat(rm.chunkSize);
                    if (!isNaN(chunkSize) && chunkSize > 0) {
                        return Math.ceil(rm.file.size / chunkSize);
                    }
                    return 0;
                },
                getProgress: function () {
                    var rm = self.resumableManager, processed = rm.processedResumables(), total = rm.chunkCount;
                    if (total === 0) {
                        return 0;
                    }
                    return Math.ceil(processed / total * 100);
                },
                checkAborted: function (intervalId) {
                    if (self.paused || self.cancelling) {
                        clearInterval(intervalId);
                        self.unlock();
                    }
                },
                upload: function () {
                    var rm = self.resumableManager, fm = self.fileManager, ids = fm.getIdList(), flag = 'new',
                        intervalId;
                    intervalId = setInterval(function () {
                        var id;
                        rm.checkAborted(intervalId);
                        if (flag === 'new') {
                            self.lock();
                            flag = 'processing';
                            id = ids.shift();
                            fm.initStats(id);
                            if (fm.stack[id]) {
                                rm.init(id, fm.stack[id], fm.getIndex(id));
                                rm.testUpload();
                                rm.uploadResumable();
                            }
                        }
                        if (!fm.isPending(id) && rm.completed) {
                            flag = 'new';
                        }
                        if (fm.isProcessed()) {
                            var $initThumbs = self.$preview.find('.file-preview-initial');
                            if ($initThumbs.length) {
                                $h.addCss($initThumbs, $h.SORT_CSS);
                                self._initSortable();
                            }
                            clearInterval(intervalId);
                            self._clearFileInput();
                            self.unlock();
                            setTimeout(function () {
                                var data = self.previewCache.data;
                                if (data) {
                                    self.initialPreview = data.content;
                                    self.initialPreviewConfig = data.config;
                                    self.initialPreviewThumbTags = data.tags;
                                }
                                self._raise('filebatchuploadcomplete', [
                                    self.initialPreview,
                                    self.initialPreviewConfig,
                                    self.initialPreviewThumbTags,
                                    self._getExtraData()
                                ]);
                            }, self.processDelay);
                        }
                    }, self.processDelay);
                },
                uploadResumable: function () {
                    var i, rm = self.resumableManager, total = rm.chunkCount;
                    for (i = 0; i < total; i++) {
                        rm.logs[i] = !!(rm.processed[rm.id] && rm.processed[rm.id][i]);
                    }
                    for (i = 0; i < total; i++) {
                        rm.pushAjax(i, 0);
                    }
                    rm.chunkIntervalId = setInterval(rm.loopAjax, self.queueDelay);
                },
                testUpload: function () {
                    var rm = self.resumableManager, opts = self.resumableUploadOptions, fd, f,
                        fm = self.fileManager, id = rm.id, fnBefore, fnSuccess, fnError, fnComplete, outData;
                    if (!opts.testUrl) {
                        rm.testing = false;
                        return;
                    }
                    rm.testing = true;
                    fd = new FormData();
                    f = fm.stack[id];
                    self._setUploadData(fd, {
                        fileId: id,
                        fileName: f.fileName,
                        fileSize: f.size,
                        fileRelativePath: f.relativePath,
                        chunkSize: rm.chunkSize,
                        chunkCount: rm.chunkCount
                    });
                    fnBefore = function (jqXHR) {
                        outData = self._getOutData(fd, jqXHR);
                        self._raise('filetestbeforesend', [id, fm, rm, outData]);
                    };
                    fnSuccess = function (data, textStatus, jqXHR) {
                        outData = self._getOutData(fd, jqXHR, data);
                        var pNames = self.uploadParamNames, chunksUploaded = pNames.chunksUploaded || 'chunksUploaded',
                            params = [id, fm, rm, outData];
                        if (!data[chunksUploaded] || !$h.isArray(data[chunksUploaded])) {
                            self._raise('filetesterror', params);
                        } else {
                            if (!rm.processed[id]) {
                                rm.processed[id] = {};
                            }
                            $.each(data[chunksUploaded], function (key, index) {
                                rm.logs[index] = true;
                                rm.processed[id][index] = true;
                            });
                            rm.processed[id].data = data;
                            self._raise('filetestsuccess', params);
                        }
                        rm.testing = false;
                    };
                    fnError = function (jqXHR, textStatus, errorThrown) {
                        outData = self._getOutData(fd, jqXHR);
                        self._raise('filetestajaxerror', [id, fm, rm, outData]);
                        rm.logAjaxError(jqXHR, textStatus, errorThrown);
                        rm.testing = false;
                    };
                    fnComplete = function () {
                        self._raise('filetestcomplete', [id, fm, rm, self._getOutData(fd)]);
                        rm.testing = false;
                    };
                    self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex, opts.testUrl);
                },
                pushAjax: function (index, retry) {
                    self.resumableManager.stack.push([index, retry]);
                },
                sendAjax: function (index, retry) {
                    var fm = self.fileManager, rm = self.resumableManager, opts = self.resumableUploadOptions, f,
                        chunkSize = rm.chunkSize, id = rm.id, file = rm.file, $thumb = rm.$thumb,
                        $btnDelete = rm.$btnDelete;
                    if (rm.processed[id] && rm.processed[id][index]) {
                        return;
                    }
                    rm.currThreads++;
                    if (retry > opts.maxRetries) {
                        rm.setProcessed('error');
                        return;
                    }
                    var fd, outData, fnBefore, fnSuccess, fnError, fnComplete, slice = file.slice ? 'slice' :
                        (file.mozSlice ? 'mozSlice' : (file.webkitSlice ? 'webkitSlice' : 'slice')),
                        blob = file[slice](chunkSize * index, chunkSize * (index + 1));
                    fd = new FormData();
                    f = fm.stack[id];
                    self._setUploadData(fd, {
                        chunkCount: rm.chunkCount,
                        chunkIndex: index,
                        chunkSize: chunkSize,
                        chunkSizeStart: chunkSize * index,
                        fileBlob: [blob, rm.fileName],
                        fileId: id,
                        fileName: rm.fileName,
                        fileRelativePath: f.relativePath,
                        fileSize: file.size,
                        retryCount: retry
                    });
                    if (rm.$progress && rm.$progress.length) {
                        rm.$progress.show();
                    }
                    fnBefore = function (jqXHR) {
                        outData = self._getOutData(fd, jqXHR);
                        if (self.showPreview) {
                            if (!$thumb.hasClass('file-preview-success')) {
                                self._setThumbStatus($thumb, 'Loading');
                                $h.addCss($thumb, 'file-uploading');
                            }
                            $btnDelete.attr('disabled', true);
                        }
                        self._raise('filechunkbeforesend', [id, index, retry, fm, rm, outData]);
                    };
                    fnSuccess = function (data, textStatus, jqXHR) {
                        outData = self._getOutData(fd, jqXHR, data);
                        var paramNames = self.uploadParamNames, chunkIndex = paramNames.chunkIndex || 'chunkIndex',
                            opts = self.resumableUploadOptions, params = [id, index, retry, fm, rm, outData];
                        rm.currThreads--;
                        if (data.error) {
                            if (opts.showErrorLog) {
                                self._log(logs.retryStatus, {
                                    retry: retry + 1,
                                    filename: rm.fileName,
                                    chunk: index
                                });
                            }
                            rm.pushAjax(index, retry + 1);
                            rm.error = data.error;
                            self._raise('filechunkerror', params);
                        } else {
                            rm.logs[data[chunkIndex]] = true;
                            if (!rm.processed[id]) {
                                rm.processed[id] = {};
                            }
                            rm.processed[id][data[chunkIndex]] = true;
                            rm.processed[id].data = data;
                            self._raise('filechunksuccess', params);
                            rm.check();
                        }
                    };
                    fnError = function (jqXHR, textStatus, errorThrown) {
                        outData = self._getOutData(fd, jqXHR);
                        rm.currThreads--;
                        rm.error = errorThrown;
                        rm.logAjaxError(jqXHR, textStatus, errorThrown);
                        self._raise('filechunkajaxerror', [id, index, retry, fm, rm, outData]);
                        rm.pushAjax(index, retry + 1);
                    };
                    fnComplete = function () {
                        self._raise('filechunkcomplete', [id, index, retry, fm, rm, self._getOutData(fd)]);
                    };
                    self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex);
                },
                loopAjax: function () {
                    var rm = self.resumableManager;
                    if (rm.currThreads < self.resumableUploadOptions.maxThreads && !rm.testing) {
                        var arr = rm.stack.shift(), index;
                        if (typeof arr !== 'undefined') {
                            index = arr[0];
                            if (!rm.processed[rm.id] || !rm.processed[rm.id][index]) {
                                rm.sendAjax(index, arr[1]);
                            } else {
                                if (rm.processedResumables() >= rm.getTotalChunks()) {
                                    rm.setProcessed('success');
                                    clearInterval(rm.chunkIntervalId);
                                }
                            }
                        }
                    }
                }
            };
            self.resumableManager.reset();
        },
        _initTemplateDefaults: function () {
            var self = this, tMain1, tMain2, tPreview, tFileIcon, tClose, tCaption, tBtnDefault, tBtnLink, tBtnBrowse,
                tModalMain, tModal, tProgress, tSize, tFooter, tActions, tActionDelete, tActionUpload, tActionDownload,
                tActionZoom, tActionDrag, tIndicator, tTagBef, tTagBef1, tTagBef2, tTagAft, tGeneric, tHtml, tImage,
                tText, tOffice, tGdocs, tVideo, tAudio, tFlash, tObject, tPdf, tOther, tStyle, tZoomCache, vDefaultDim,
                tStats;
            tMain1 = '{preview}\n' +
                '<div class="kv-upload-progress kv-hidden"></div><div class="clearfix"></div>\n' +
                '<div class="input-group {class}">\n' +
                '  {caption}\n' +
                '<div class="input-group-btn input-group-append">\n' +
                '      {remove}\n' +
                '      {cancel}\n' +
                '      {pause}\n' +
                '      {upload}\n' +
                '      {browse}\n' +
                '    </div>\n' +
                '</div>';
            tMain2 = '{preview}\n<div class="kv-upload-progress kv-hidden"></div>\n<div class="clearfix"></div>\n' +
                '{remove}\n{cancel}\n{upload}\n{browse}\n';
            tPreview = '<div class="file-preview {class}">\n' +
                '  {close}' +
                '  <div class="{dropClass} clearfix">\n' +
                '    <div class="file-preview-thumbnails clearfix">\n' +
                '    </div>\n' +
                '    <div class="file-preview-status text-center text-success"></div>\n' +
                '    <div class="kv-fileinput-error"></div>\n' +
                '  </div>\n' +
                '</div>';
            tClose = $h.closeButton('fileinput-remove');
            tFileIcon = '<i class="glyphicon glyphicon-file"></i>';
            // noinspection HtmlUnknownAttribute
            tCaption = '<div class="file-caption form-control {class}" tabindex="500">\n' +
                '  <span class="file-caption-icon"></span>\n' +
                '  <input class="file-caption-name" onkeydown="return false;" onpaste="return false;">\n' +
                '</div>';
            //noinspection HtmlUnknownAttribute
            tBtnDefault = '<button type="{type}" tabindex="500" title="{title}" class="{css}" ' +
                '{status}>{icon} {label}</button>';
            //noinspection HtmlUnknownTarget,HtmlUnknownAttribute
            tBtnLink = '<a href="{href}" tabindex="500" title="{title}" class="{css}" {status}>{icon} {label}</a>';
            //noinspection HtmlUnknownAttribute
            tBtnBrowse = '<div tabindex="500" class="{css}" {status}>{icon} {label}</div>';
            tModalMain = '<div id="' + $h.MODAL_ID + '" class="file-zoom-dialog modal fade" ' +
                'tabindex="-1" aria-labelledby="' + $h.MODAL_ID + 'Label"></div>';
            tModal = '<div class="modal-dialog modal-lg{rtl}" role="document">\n' +
                '  <div class="modal-content">\n' +
                '    <div class="modal-header">\n' +
                '      <h5 class="modal-title">{heading}</h5>\n' +
                '      <span class="kv-zoom-title"></span>\n' +
                '      <div class="kv-zoom-actions">{toggleheader}{fullscreen}{borderless}{close}</div>\n' +
                '    </div>\n' +
                '    <div class="modal-body">\n' +
                '      <div class="floating-buttons"></div>\n' +
                '      <div class="kv-zoom-body file-zoom-content {zoomFrameClass}"></div>\n' + '{prev} {next}\n' +
                '    </div>\n' +
                '  </div>\n' +
                '</div>\n';
            tProgress = '<div class="progress">\n' +
                '    <div class="{class}" role="progressbar"' +
                ' aria-valuenow="{percent}" aria-valuemin="0" aria-valuemax="100" style="width:{percent}%;">\n' +
                '        {status}\n' +
                '     </div>\n' +
                '</div>{stats}';
            tStats = '<div class="text-info file-upload-stats">' +
                '<span class="pending-time">{pendingTime}</span> ' +
                '<span class="upload-speed">{uploadSpeed}</span>' +
                '</div>';
            tSize = ' <samp>({sizeText})</samp>';
            tFooter = '<div class="file-thumbnail-footer">\n' +
                '    <div class="file-footer-caption" title="{caption}">\n' +
                '        <div class="file-caption-info">{caption}</div>\n' +
                '        <div class="file-size-info">{size}</div>\n' +
                '    </div>\n' +
                '    {progress}\n{indicator}\n{actions}\n' +
                '</div>';
            tActions = '<div class="file-actions">\n' +
                '    <div class="file-footer-buttons">\n' +
                '        {download} {upload} {delete} {zoom} {other}' +
                '    </div>\n' +
                '</div>\n' +
                '{drag}\n' +
                '<div class="clearfix"></div>';
            //noinspection HtmlUnknownAttribute
            tActionDelete = '<button type="button" class="kv-file-remove {removeClass}" ' +
                'title="{removeTitle}" {dataUrl}{dataKey}>{removeIcon}</button>\n';
            tActionUpload = '<button type="button" class="kv-file-upload {uploadClass}" title="{uploadTitle}">' +
                '{uploadIcon}</button>';
            tActionDownload = '<a class="kv-file-download {downloadClass}" title="{downloadTitle}" ' +
                'href="{downloadUrl}" download="{caption}" target="_blank">{downloadIcon}</a>';
            tActionZoom = '<button type="button" class="kv-file-zoom {zoomClass}" ' +
                'title="{zoomTitle}">{zoomIcon}</button>';
            tActionDrag = '<span class="file-drag-handle {dragClass}" title="{dragTitle}">{dragIcon}</span>';
            tIndicator = '<div class="file-upload-indicator" title="{indicatorTitle}">{indicator}</div>';
            tTagBef = '<div class="file-preview-frame {frameClass}" id="{previewId}" data-fileindex="{fileindex}"' +
                ' data-fileid="{fileid}" data-template="{template}"';
            tTagBef1 = tTagBef + '><div class="kv-file-content">\n';
            tTagBef2 = tTagBef + ' title="{caption}"><div class="kv-file-content">\n';
            tTagAft = '</div>{footer}\n</div>\n';
            tGeneric = '{content}\n';
            tStyle = ' {style}';
            tHtml = '<div class="kv-preview-data file-preview-html" title="{caption}"' + tStyle + '>{data}</div>\n';
            tImage = '<img src="{data}" class="file-preview-image kv-preview-data" title="{title}" ' +
                'alt="{alt}"' + tStyle + '>\n';
            tText = '<textarea class="kv-preview-data file-preview-text" title="{caption}" readonly' + tStyle + '>' +
                '{data}</textarea>\n';
            tOffice = '<iframe class="kv-preview-data file-preview-office" ' +
                'src="https://view.officeapps.live.com/op/embed.aspx?src={data}"' + tStyle + '></iframe>';
            tGdocs = '<iframe class="kv-preview-data file-preview-gdocs" ' +
                'src="https://docs.google.com/gview?url={data}&embedded=true"' + tStyle + '></iframe>';
            tVideo = '<video class="kv-preview-data file-preview-video" controls' + tStyle + '>\n' +
                '<source src="{data}" type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</video>\n';
            tAudio = '<!--suppress ALL --><audio class="kv-preview-data file-preview-audio" controls' + tStyle + '>\n<source src="{data}" ' +
                'type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</audio>\n';
            tFlash = '<embed class="kv-preview-data file-preview-flash" src="{data}" type="application/x-shockwave-flash"' + tStyle + '>\n';
            tPdf = '<embed class="kv-preview-data file-preview-pdf" src="{data}" type="application/pdf"' + tStyle + '>\n';
            tObject = '<object class="kv-preview-data file-preview-object file-object {typeCss}" ' +
                'data="{data}" type="{type}"' + tStyle + '>\n' + '<param name="movie" value="{caption}" />\n' +
                $h.OBJECT_PARAMS + ' ' + $h.DEFAULT_PREVIEW + '\n</object>\n';
            tOther = '<div class="kv-preview-data file-preview-other-frame"' + tStyle + '>\n' + $h.DEFAULT_PREVIEW + '\n</div>\n';
            tZoomCache = '<div class="kv-zoom-cache" style="display:none">{zoomContent}</div>';
            vDefaultDim = {width: '100%', height: '100%', 'min-height': '480px'};
            if (self._isPdfRendered()) {
                tPdf = self.pdfRendererTemplate.replace('{renderer}', self._encodeURI(self.pdfRendererUrl));
            }
            self.defaults = {
                layoutTemplates: {
                    main1: tMain1,
                    main2: tMain2,
                    preview: tPreview,
                    close: tClose,
                    fileIcon: tFileIcon,
                    caption: tCaption,
                    modalMain: tModalMain,
                    modal: tModal,
                    progress: tProgress,
                    stats: tStats,
                    size: tSize,
                    footer: tFooter,
                    indicator: tIndicator,
                    actions: tActions,
                    actionDelete: tActionDelete,
                    actionUpload: tActionUpload,
                    actionDownload: tActionDownload,
                    actionZoom: tActionZoom,
                    actionDrag: tActionDrag,
                    btnDefault: tBtnDefault,
                    btnLink: tBtnLink,
                    btnBrowse: tBtnBrowse,
                    zoomCache: tZoomCache
                },
                previewMarkupTags: {
                    tagBefore1: tTagBef1,
                    tagBefore2: tTagBef2,
                    tagAfter: tTagAft
                },
                previewContentTemplates: {
                    generic: tGeneric,
                    html: tHtml,
                    image: tImage,
                    text: tText,
                    office: tOffice,
                    gdocs: tGdocs,
                    video: tVideo,
                    audio: tAudio,
                    flash: tFlash,
                    object: tObject,
                    pdf: tPdf,
                    other: tOther
                },
                allowedPreviewTypes: ['image', 'html', 'text', 'video', 'audio', 'flash', 'pdf', 'object'],
                previewTemplates: {},
                previewSettings: {
                    image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                    html: {width: '213px', height: '160px'},
                    text: {width: '213px', height: '160px'},
                    office: {width: '213px', height: '160px'},
                    gdocs: {width: '213px', height: '160px'},
                    video: {width: '213px', height: '160px'},
                    audio: {width: '100%', height: '30px'},
                    flash: {width: '213px', height: '160px'},
                    object: {width: '213px', height: '160px'},
                    pdf: {width: '100%', height: '160px'},
                    other: {width: '213px', height: '160px'}
                },
                previewSettingsSmall: {
                    image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                    html: {width: '100%', height: '160px'},
                    text: {width: '100%', height: '160px'},
                    office: {width: '100%', height: '160px'},
                    gdocs: {width: '100%', height: '160px'},
                    video: {width: '100%', height: 'auto'},
                    audio: {width: '100%', height: '30px'},
                    flash: {width: '100%', height: 'auto'},
                    object: {width: '100%', height: 'auto'},
                    pdf: {width: '100%', height: '160px'},
                    other: {width: '100%', height: '160px'}
                },
                previewZoomSettings: {
                    image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                    html: vDefaultDim,
                    text: vDefaultDim,
                    office: {width: '100%', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                    gdocs: {width: '100%', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                    video: {width: 'auto', height: '100%', 'max-width': '100%'},
                    audio: {width: '100%', height: '30px'},
                    flash: {width: 'auto', height: '480px'},
                    object: {width: 'auto', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                    pdf: vDefaultDim,
                    other: {width: 'auto', height: '100%', 'min-height': '480px'}
                },
                mimeTypeAliases: {
                    'video/quicktime': 'video/mp4'
                },
                fileTypeSettings: {
                    image: function (vType, vName) {
                        return ($h.compare(vType, 'image.*') && !$h.compare(vType, /(tiff?|wmf)$/i) ||
                            $h.compare(vName, /\.(gif|png|jpe?g)$/i));
                    },
                    html: function (vType, vName) {
                        return $h.compare(vType, 'text/html') || $h.compare(vName, /\.(htm|html)$/i);
                    },
                    office: function (vType, vName) {
                        return $h.compare(vType, /(word|excel|powerpoint|office)$/i) ||
                            $h.compare(vName, /\.(docx?|xlsx?|pptx?|pps|potx?)$/i);
                    },
                    gdocs: function (vType, vName) {
                        return $h.compare(vType, /(word|excel|powerpoint|office|iwork-pages|tiff?)$/i) ||
                            $h.compare(vName,
                                /\.(docx?|xlsx?|pptx?|pps|potx?|rtf|ods|odt|pages|ai|dxf|ttf|tiff?|wmf|e?ps)$/i);
                    },
                    text: function (vType, vName) {
                        return $h.compare(vType, 'text.*') || $h.compare(vName, /\.(xml|javascript)$/i) ||
                            $h.compare(vName, /\.(txt|md|csv|nfo|ini|json|php|js|css)$/i);
                    },
                    video: function (vType, vName) {
                        return $h.compare(vType, 'video.*') && ($h.compare(vType, /(ogg|mp4|mp?g|mov|webm|3gp)$/i) ||
                            $h.compare(vName, /\.(og?|mp4|webm|mp?g|mov|3gp)$/i));
                    },
                    audio: function (vType, vName) {
                        return $h.compare(vType, 'audio.*') && ($h.compare(vName, /(ogg|mp3|mp?g|wav)$/i) ||
                            $h.compare(vName, /\.(og?|mp3|mp?g|wav)$/i));
                    },
                    flash: function (vType, vName) {
                        return $h.compare(vType, 'application/x-shockwave-flash', true) || $h.compare(vName,
                            /\.(swf)$/i);
                    },
                    pdf: function (vType, vName) {
                        return $h.compare(vType, 'application/pdf', true) || $h.compare(vName, /\.(pdf)$/i);
                    },
                    object: function () {
                        return true;
                    },
                    other: function () {
                        return true;
                    }
                },
                fileActionSettings: {
                    showRemove: true,
                    showUpload: true,
                    showDownload: true,
                    showZoom: true,
                    showDrag: true,
                    removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
                    removeClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                    removeErrorClass: 'btn btn-sm btn-kv btn-danger',
                    removeTitle: 'Remove file',
                    uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
                    uploadClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                    uploadTitle: 'Upload file',
                    uploadRetryIcon: '<i class="glyphicon glyphicon-repeat"></i>',
                    uploadRetryTitle: 'Retry upload',
                    downloadIcon: '<i class="glyphicon glyphicon-download"></i>',
                    downloadClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                    downloadTitle: 'Download file',
                    zoomIcon: '<i class="glyphicon glyphicon-zoom-in"></i>',
                    zoomClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                    zoomTitle: 'View Details',
                    dragIcon: '<i class="glyphicon glyphicon-move"></i>',
                    dragClass: 'text-info',
                    dragTitle: 'Move / Rearrange',
                    dragSettings: {},
                    indicatorNew: '<i class="glyphicon glyphicon-plus-sign text-warning"></i>',
                    indicatorSuccess: '<i class="glyphicon glyphicon-ok-sign text-success"></i>',
                    indicatorError: '<i class="glyphicon glyphicon-exclamation-sign text-danger"></i>',
                    indicatorLoading: '<i class="glyphicon glyphicon-hourglass text-muted"></i>',
                    indicatorPaused: '<i class="glyphicon glyphicon-pause text-primary"></i>',
                    indicatorNewTitle: 'Not uploaded yet',
                    indicatorSuccessTitle: 'Uploaded',
                    indicatorErrorTitle: 'Upload Error',
                    indicatorLoadingTitle: 'Uploading ...',
                    indicatorPausedTitle: 'Upload Paused'
                }
            };
            $.each(self.defaults, function (key, setting) {
                if (key === 'allowedPreviewTypes') {
                    if (self.allowedPreviewTypes === undefined) {
                        self.allowedPreviewTypes = setting;
                    }
                    return;
                }
                self[key] = $.extend(true, {}, setting, self[key]);
            });
            self._initPreviewTemplates();
        },
        _initPreviewTemplates: function () {
            var self = this, tags = self.previewMarkupTags, tagBef, tagAft = tags.tagAfter;
            $.each(self.previewContentTemplates, function (key, value) {
                if ($h.isEmpty(self.previewTemplates[key])) {
                    tagBef = tags.tagBefore2;
                    if (key === 'generic' || key === 'image' || key === 'html' || key === 'text') {
                        tagBef = tags.tagBefore1;
                    }
                    if (self._isPdfRendered() && key === 'pdf') {
                        tagBef = tagBef.replace('kv-file-content', 'kv-file-content kv-pdf-rendered');
                    }
                    self.previewTemplates[key] = tagBef + value + tagAft;
                }
            });
        },
        _initPreviewCache: function () {
            var self = this;
            self.previewCache = {
                data: {},
                init: function () {
                    var content = self.initialPreview;
                    if (content.length > 0 && !$h.isArray(content)) {
                        content = content.split(self.initialPreviewDelimiter);
                    }
                    self.previewCache.data = {
                        content: content,
                        config: self.initialPreviewConfig,
                        tags: self.initialPreviewThumbTags
                    };
                },
                count: function (skipNull) {
                    if (!self.previewCache.data || !self.previewCache.data.content) {
                        return 0;
                    }
                    if (skipNull) {
                        var chk = self.previewCache.data.content.filter(function (n) {
                            return n !== null;
                        });
                        return chk.length;
                    }
                    return self.previewCache.data.content.length;
                },
                get: function (i, isDisabled) {
                    var ind = $h.INIT_FLAG + i, data = self.previewCache.data, config = data.config[i],
                        content = data.content[i], out, $tmp, cat, ftr,
                        fname, ftype, frameClass, asData = $h.ifSet('previewAsData', config, self.initialPreviewAsData),
                        a = config ? {title: config.title || null, alt: config.alt || null} : {title: null, alt: null},
                        parseTemplate = function (cat, dat, fname, ftype, ftr, ind, fclass, t) {
                            var fc = ' file-preview-initial ' + $h.SORT_CSS + (fclass ? ' ' + fclass : ''),
                                id = self.previewInitId + '-' + ind,
                                fileId = config && config.fileId || id;
                            /** @namespace config.zoomData */
                            return self._generatePreviewTemplate(cat, dat, fname, ftype, id, fileId, false, null, fc,
                                ftr, ind, t, a, config && config.zoomData || dat);
                        };
                    if (!content || !content.length) {
                        return '';
                    }
                    isDisabled = isDisabled === undefined ? true : isDisabled;
                    cat = $h.ifSet('type', config, self.initialPreviewFileType || 'generic');
                    fname = $h.ifSet('filename', config, $h.ifSet('caption', config));
                    ftype = $h.ifSet('filetype', config, cat);
                    ftr = self.previewCache.footer(i, isDisabled, (config && config.size || null));
                    frameClass = $h.ifSet('frameClass', config);
                    if (asData) {
                        out = parseTemplate(cat, content, fname, ftype, ftr, ind, frameClass);
                    } else {
                        out = parseTemplate('generic', content, fname, ftype, ftr, ind, frameClass, cat)
                            .setTokens({'content': data.content[i]});
                    }
                    if (data.tags.length && data.tags[i]) {
                        out = $h.replaceTags(out, data.tags[i]);
                    }
                    /** @namespace config.frameAttr */
                    if (!$h.isEmpty(config) && !$h.isEmpty(config.frameAttr)) {
                        $tmp = $(document.createElement('div')).html(out);
                        $tmp.find('.file-preview-initial').attr(config.frameAttr);
                        out = $tmp.html();
                        $tmp.remove();
                    }
                    return out;
                },
                clean: function (data) {
                    data.content = $h.cleanArray(data.content);
                    data.config = $h.cleanArray(data.config);
                    data.tags = $h.cleanArray(data.tags);
                    self.previewCache.data = data;
                },
                add: function (content, config, tags, append) {
                    var data = self.previewCache.data, index;
                    if (!content || !content.length) {
                        return 0;
                    }
                    index = content.length - 1;
                    if (!$h.isArray(content)) {
                        content = content.split(self.initialPreviewDelimiter);
                    }
                    if (append) {
                        index = data.content.push(content[0]) - 1;
                        data.config[index] = config;
                        data.tags[index] = tags;
                    } else {
                        data.content = content;
                        data.config = config;
                        data.tags = tags;
                    }
                    self.previewCache.clean(data);
                    return index;
                },
                set: function (content, config, tags, append) {
                    var data = self.previewCache.data, i, chk;
                    if (!content || !content.length) {
                        return;
                    }
                    if (!$h.isArray(content)) {
                        content = content.split(self.initialPreviewDelimiter);
                    }
                    chk = content.filter(function (n) {
                        return n !== null;
                    });
                    if (!chk.length) {
                        return;
                    }
                    if (data.content === undefined) {
                        data.content = [];
                    }
                    if (data.config === undefined) {
                        data.config = [];
                    }
                    if (data.tags === undefined) {
                        data.tags = [];
                    }
                    if (append) {
                        for (i = 0; i < content.length; i++) {
                            if (content[i]) {
                                data.content.push(content[i]);
                            }
                        }
                        for (i = 0; i < config.length; i++) {
                            if (config[i]) {
                                data.config.push(config[i]);
                            }
                        }
                        for (i = 0; i < tags.length; i++) {
                            if (tags[i]) {
                                data.tags.push(tags[i]);
                            }
                        }
                    } else {
                        data.content = content;
                        data.config = config;
                        data.tags = tags;
                    }
                    self.previewCache.clean(data);
                },
                unset: function (index) {
                    var chk = self.previewCache.count(), rev = self.reversePreviewOrder;
                    if (!chk) {
                        return;
                    }
                    if (chk === 1) {
                        self.previewCache.data.content = [];
                        self.previewCache.data.config = [];
                        self.previewCache.data.tags = [];
                        self.initialPreview = [];
                        self.initialPreviewConfig = [];
                        self.initialPreviewThumbTags = [];
                        return;
                    }
                    self.previewCache.data.content = $h.spliceArray(self.previewCache.data.content, index, rev);
                    self.previewCache.data.config = $h.spliceArray(self.previewCache.data.config, index, rev);
                    self.previewCache.data.tags = $h.spliceArray(self.previewCache.data.tags, index, rev);
                    var data = $.extend(true, {}, self.previewCache.data);
                    self.previewCache.clean(data);
                },
                out: function () {
                    var html = '', caption, len = self.previewCache.count(), i, content;
                    if (len === 0) {
                        return {content: '', caption: ''};
                    }
                    for (i = 0; i < len; i++) {
                        content = self.previewCache.get(i);
                        html = self.reversePreviewOrder ? (content + html) : (html + content);
                    }
                    caption = self._getMsgSelected(len);
                    return {content: html, caption: caption};
                },
                footer: function (i, isDisabled, size) {
                    var data = self.previewCache.data || {};
                    if ($h.isEmpty(data.content)) {
                        return '';
                    }
                    if ($h.isEmpty(data.config) || $h.isEmpty(data.config[i])) {
                        data.config[i] = {};
                    }
                    isDisabled = isDisabled === undefined ? true : isDisabled;
                    var config = data.config[i], caption = $h.ifSet('caption', config), a,
                        width = $h.ifSet('width', config, 'auto'), url = $h.ifSet('url', config, false),
                        key = $h.ifSet('key', config, null), fileId = $h.ifSet('fileId', config, null),
                        fs = self.fileActionSettings, initPreviewShowDel = self.initialPreviewShowDelete || false,
                        downloadInitialUrl = !self.initialPreviewDownloadUrl ? '' :
                            self.initialPreviewDownloadUrl + '?key=' + key + (fileId ? '&fileId=' + fileId : ''),
                        dUrl = config.downloadUrl || downloadInitialUrl,
                        dFil = config.filename || config.caption || '',
                        initPreviewShowDwl = !!(dUrl),
                        sDel = $h.ifSet('showRemove', config, $h.ifSet('showRemove', fs, initPreviewShowDel)),
                        sDwl = $h.ifSet('showDownload', config, $h.ifSet('showDownload', fs, initPreviewShowDwl)),
                        sZm = $h.ifSet('showZoom', config, $h.ifSet('showZoom', fs, true)),
                        sDrg = $h.ifSet('showDrag', config, $h.ifSet('showDrag', fs, true)),
                        dis = (url === false) && isDisabled;
                    sDwl = sDwl && config.downloadUrl !== false && !!dUrl;
                    a = self._renderFileActions(config, false, sDwl, sDel, sZm, sDrg, dis, url, key, true, dUrl, dFil);
                    return self._getLayoutTemplate('footer').setTokens({
                        'progress': self._renderThumbProgress(),
                        'actions': a,
                        'caption': caption,
                        'size': self._getSize(size),
                        'width': width,
                        'indicator': ''
                    });
                }
            };
            self.previewCache.init();
        },
        _isPdfRendered: function () {
            var self = this, useLib = self.usePdfRenderer,
                flag = typeof useLib === 'function' ? useLib() : !!useLib;
            return flag && self.pdfRendererUrl;
        },
        _handler: function ($el, event, callback) {
            var self = this, ns = self.namespace, ev = event.split(' ').join(ns + ' ') + ns;
            if (!$el || !$el.length) {
                return;
            }
            $el.off(ev).on(ev, callback);
        },
        _encodeURI: function (vUrl) {
            var self = this;
            return self.encodeUrl ? encodeURI(vUrl) : vUrl;
        },
        _log: function (msg, tokens) {
            var self = this, id = self.$element.attr('id');
            if (!self.showConsoleLogs) {
                return;
            }
            if (id) {
                msg = '"' + id + '": ' + msg;
            }
            msg = 'bootstrap-fileinput: ' + msg;
            if (typeof tokens === 'object') {
                msg = msg.setTokens(tokens);
            }
            if (window.console && typeof window.console.log !== 'undefined') {
                window.console.log(msg);
            } else {
                window.alert(msg);
            }
        },
        _validate: function () {
            var self = this, status = self.$element.attr('type') === 'file';
            if (!status) {
                self._log($h.logMessages.badInputType);
            }
            return status;
        },
        _errorsExist: function () {
            var self = this, $err, $errList = self.$errorContainer.find('li');
            if ($errList.length) {
                return true;
            }
            $err = $(document.createElement('div')).html(self.$errorContainer.html());
            $err.find('.kv-error-close').remove();
            $err.find('ul').remove();
            return !!$.trim($err.text()).length;
        },
        _errorHandler: function (evt, caption) {
            var self = this, err = evt.target.error, showError = function (msg) {
                self._showError(msg.replace('{name}', caption));
            };
            /** @namespace err.NOT_FOUND_ERR */
            /** @namespace err.SECURITY_ERR */
            /** @namespace err.NOT_READABLE_ERR */
            if (err.code === err.NOT_FOUND_ERR) {
                showError(self.msgFileNotFound);
            } else {
                if (err.code === err.SECURITY_ERR) {
                    showError(self.msgFileSecured);
                } else {
                    if (err.code === err.NOT_READABLE_ERR) {
                        showError(self.msgFileNotReadable);
                    } else {
                        if (err.code === err.ABORT_ERR) {
                            showError(self.msgFilePreviewAborted);
                        } else {
                            showError(self.msgFilePreviewError);
                        }
                    }
                }
            }
        },
        _addError: function (msg) {
            var self = this, $error = self.$errorContainer;
            if (msg && $error.length) {
                $error.html(self.errorCloseButton + msg);
                self._handler($error.find('.kv-error-close'), 'click', function () {
                    setTimeout(function () {
                        if (self.showPreview && !self.getFrames().length) {
                            self.clear();
                        }
                        $error.fadeOut('slow');
                    }, self.processDelay);
                });
            }
        },
        _setValidationError: function (css) {
            var self = this;
            css = (css ? css + ' ' : '') + 'has-error';
            self.$container.removeClass(css).addClass('has-error');
            $h.addCss(self.$captionContainer, 'is-invalid');
        },
        _resetErrors: function (fade) {
            var self = this, $error = self.$errorContainer;
            self.isError = false;
            self.$container.removeClass('has-error');
            self.$captionContainer.removeClass('is-invalid');
            $error.html('');
            if (fade) {
                $error.fadeOut('slow');
            } else {
                $error.hide();
            }
        },
        _showFolderError: function (folders) {
            var self = this, $error = self.$errorContainer, msg;
            if (!folders) {
                return;
            }
            if (!self.isAjaxUpload) {
                self._clearFileInput();
            }
            msg = self.msgFoldersNotAllowed.replace('{n}', folders);
            self._addError(msg);
            self._setValidationError();
            $error.fadeIn(800);
            self._raise('filefoldererror', [folders, msg]);
        },
        _showFileError: function (msg, params, event) {
            var self = this, $error = self.$errorContainer, ev = event || 'fileuploaderror',
                fId = params && params.fileId || '', e = params && params.id ?
                '<li data-thumb-id="' + params.id + '" data-file-id="' + fId + '">' + msg + '</li>' : '<li>' + msg + '</li>';

            if ($error.find('ul').length === 0) {
                self._addError('<ul>' + e + '</ul>');
            } else {
                $error.find('ul').append(e);
            }
            $error.fadeIn(800);
            self._raise(ev, [params, msg]);
            self._setValidationError('file-input-new');
            return true;
        },
        _showError: function (msg, params, event) {
            var self = this, $error = self.$errorContainer, ev = event || 'fileerror';
            params = params || {};
            params.reader = self.reader;
            self._addError(msg);
            $error.fadeIn(800);
            self._raise(ev, [params, msg]);
            if (!self.isAjaxUpload) {
                self._clearFileInput();
            }
            self._setValidationError('file-input-new');
            self.$btnUpload.attr('disabled', true);
            return true;
        },
        _noFilesError: function (params) {
            var self = this, label = self.minFileCount > 1 ? self.filePlural : self.fileSingle,
                msg = self.msgFilesTooLess.replace('{n}', self.minFileCount).replace('{files}', label),
                $error = self.$errorContainer;
            self._addError(msg);
            self.isError = true;
            self._updateFileDetails(0);
            $error.fadeIn(800);
            self._raise('fileerror', [params, msg]);
            self._clearFileInput();
            self._setValidationError();
        },
        _parseError: function (operation, jqXHR, errorThrown, fileName) {
            /** @namespace jqXHR.responseJSON */
            var self = this, errMsg = $.trim(errorThrown + ''), textPre,
                text = jqXHR.responseJSON !== undefined && jqXHR.responseJSON.error !== undefined ?
                    jqXHR.responseJSON.error : jqXHR.responseText;
            if (self.cancelling && self.msgUploadAborted) {
                errMsg = self.msgUploadAborted;
            }
            if (self.showAjaxErrorDetails && text) {
                text = $.trim(text.replace(/\n\s*\n/g, '\n'));
                textPre = text.length ? '<pre>' + text + '</pre>' : '';
                errMsg += errMsg ? textPre : text;
            }
            if (!errMsg) {
                errMsg = self.msgAjaxError.replace('{operation}', operation);
            }
            self.cancelling = false;
            return fileName ? '<b>' + fileName + ': </b>' + errMsg : errMsg;
        },
        _parseFileType: function (type, name) {
            var self = this, isValid, vType, cat, i, types = self.allowedPreviewTypes || [];
            if (type === 'application/text-plain') {
                return 'text';
            }
            for (i = 0; i < types.length; i++) {
                cat = types[i];
                isValid = self.fileTypeSettings[cat];
                vType = isValid(type, name) ? cat : '';
                if (!$h.isEmpty(vType)) {
                    return vType;
                }
            }
            return 'other';
        },
        _getPreviewIcon: function (fname) {
            var self = this, ext, out = null;
            if (fname && fname.indexOf('.') > -1) {
                ext = fname.split('.').pop();
                if (self.previewFileIconSettings) {
                    out = self.previewFileIconSettings[ext] || self.previewFileIconSettings[ext.toLowerCase()] || null;
                }
                if (self.previewFileExtSettings) {
                    $.each(self.previewFileExtSettings, function (key, func) {
                        if (self.previewFileIconSettings[key] && func(ext)) {
                            out = self.previewFileIconSettings[key];
                            //noinspection UnnecessaryReturnStatementJS
                            return;
                        }
                    });
                }
            }
            return out || self.previewFileIcon;
        },
        _parseFilePreviewIcon: function (content, fname) {
            var self = this, icn = self._getPreviewIcon(fname), out = content;
            if (out.indexOf('{previewFileIcon}') > -1) {
                out = out.setTokens({'previewFileIconClass': self.previewFileIconClass, 'previewFileIcon': icn});
            }
            return out;
        },
        _raise: function (event, params) {
            var self = this, e = $.Event(event);
            if (params !== undefined) {
                self.$element.trigger(e, params);
            } else {
                self.$element.trigger(e);
            }
            if (e.isDefaultPrevented() || e.result === false) {
                return false;
            }
            switch (event) {
                // ignore these events
                case 'filebatchuploadcomplete':
                case 'filebatchuploadsuccess':
                case 'fileuploaded':
                case 'fileclear':
                case 'filecleared':
                case 'filereset':
                case 'fileerror':
                case 'filefoldererror':
                case 'fileuploaderror':
                case 'filebatchuploaderror':
                case 'filedeleteerror':
                case 'filecustomerror':
                case 'filesuccessremove':
                    break;
                // receive data response via `filecustomerror` event`
                default:
                    if (!self.ajaxAborted) {
                        self.ajaxAborted = e.result;
                    }
                    break;
            }
            return true;
        },
        _listenFullScreen: function (isFullScreen) {
            var self = this, $modal = self.$modal, $btnFull, $btnBord;
            if (!$modal || !$modal.length) {
                return;
            }
            $btnFull = $modal && $modal.find('.btn-fullscreen');
            $btnBord = $modal && $modal.find('.btn-borderless');
            if (!$btnFull.length || !$btnBord.length) {
                return;
            }
            $btnFull.removeClass('active').attr('aria-pressed', 'false');
            $btnBord.removeClass('active').attr('aria-pressed', 'false');
            if (isFullScreen) {
                $btnFull.addClass('active').attr('aria-pressed', 'true');
            } else {
                $btnBord.addClass('active').attr('aria-pressed', 'true');
            }
            if ($modal.hasClass('file-zoom-fullscreen')) {
                self._maximizeZoomDialog();
            } else {
                if (isFullScreen) {
                    self._maximizeZoomDialog();
                } else {
                    $btnBord.removeClass('active').attr('aria-pressed', 'false');
                }
            }
        },
        _listen: function () {
            var self = this, $el = self.$element, $form = self.$form, $cont = self.$container, fullScreenEvents;
            self._handler($el, 'click', function (e) {
                if ($el.hasClass('file-no-browse')) {
                    if ($el.data('zoneClicked')) {
                        $el.data('zoneClicked', false);
                    } else {
                        e.preventDefault();
                    }
                }
            });
            self._handler($el, 'change', $.proxy(self._change, self));
            if (self.showBrowse) {
                self._handler(self.$btnFile, 'click', $.proxy(self._browse, self));
            }
            self._handler($cont.find('.fileinput-remove:not([disabled])'), 'click', $.proxy(self.clear, self));
            self._handler($cont.find('.fileinput-cancel'), 'click', $.proxy(self.cancel, self));
            self._handler($cont.find('.fileinput-pause'), 'click', $.proxy(self.pause, self));
            self._initDragDrop();
            self._handler($form, 'reset', $.proxy(self.clear, self));
            if (!self.isAjaxUpload) {
                self._handler($form, 'submit', $.proxy(self._submitForm, self));
            }
            self._handler(self.$container.find('.fileinput-upload'), 'click', $.proxy(self._uploadClick, self));
            self._handler($(window), 'resize', function () {
                self._listenFullScreen(screen.width === window.innerWidth && screen.height === window.innerHeight);
            });
            fullScreenEvents = 'webkitfullscreenchange mozfullscreenchange fullscreenchange MSFullscreenChange';
            self._handler($(document), fullScreenEvents, function () {
                self._listenFullScreen($h.checkFullScreen());
            });
            self._autoFitContent();
            self._initClickable();
            self._refreshPreview();
        },
        _autoFitContent: function () {
            var width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                self = this, config = width < 400 ? (self.previewSettingsSmall || self.defaults.previewSettingsSmall) :
                (self.previewSettings || self.defaults.previewSettings), sel;
            $.each(config, function (cat, settings) {
                sel = '.file-preview-frame .file-preview-' + cat;
                self.$preview.find(sel + '.kv-preview-data,' + sel + ' .kv-preview-data').css(settings);
            });
        },
        _scanDroppedItems: function (item, files, path) {
            path = path || '';
            var self = this, i, dirReader, readDir, errorHandler = function (e) {
                self._log($h.logMessages.badDroppedFiles);
                self._log(e);
            };
            if (item.isFile) {
                item.file(function (file) {
                    files.push(file);
                }, errorHandler);
            } else {
                if (item.isDirectory) {
                    dirReader = item.createReader();
                    readDir = function () {
                        dirReader.readEntries(function (entries) {
                            if (entries && entries.length > 0) {
                                for (i = 0; i < entries.length; i++) {
                                    self._scanDroppedItems(entries[i], files, path + item.name + '/');
                                }
                                // recursively call readDir() again, since browser can only handle first 100 entries.
                                readDir();
                            }
                            return null;
                        }, errorHandler);
                    };
                    readDir();
                }
            }

        },
        _initDragDrop: function () {
            var self = this, $zone = self.$dropZone;
            if (self.dropZoneEnabled && self.showPreview) {
                self._handler($zone, 'dragenter dragover', $.proxy(self._zoneDragEnter, self));
                self._handler($zone, 'dragleave', $.proxy(self._zoneDragLeave, self));
                self._handler($zone, 'drop', $.proxy(self._zoneDrop, self));
                self._handler($(document), 'dragenter dragover drop', self._zoneDragDropInit);
            }
        },
        _zoneDragDropInit: function (e) {
            e.stopPropagation();
            e.preventDefault();
        },
        _zoneDragEnter: function (e) {
            var self = this, dataTransfer = e.originalEvent.dataTransfer,
                hasFiles = $.inArray('Files', dataTransfer.types) > -1;
            self._zoneDragDropInit(e);
            if (self.isDisabled || !hasFiles) {
                e.originalEvent.dataTransfer.effectAllowed = 'none';
                e.originalEvent.dataTransfer.dropEffect = 'none';
                return;
            }
            if (self._raise('fileDragEnter', {'sourceEvent': e, 'files': dataTransfer.types.Files})) {
                $h.addCss(self.$dropZone, 'file-highlighted');
            }
        },
        _zoneDragLeave: function (e) {
            var self = this;
            self._zoneDragDropInit(e);
            if (self.isDisabled) {
                return;
            }
            if (self._raise('fileDragLeave', {'sourceEvent': e})) {
                self.$dropZone.removeClass('file-highlighted');
            }

        },
        _zoneDrop: function (e) {
            /** @namespace e.originalEvent.dataTransfer */
            var self = this, i, $el = self.$element, dataTransfer = e.originalEvent.dataTransfer,
                files = dataTransfer.files, items = dataTransfer.items, folders = $h.getDragDropFolders(items),
                processFiles = function () {
                    if (!self.isAjaxUpload) {
                        self.changeTriggered = true;
                        $el.get(0).files = files;
                        setTimeout(function () {
                            self.changeTriggered = false;
                            $el.trigger('change' + self.namespace);
                        }, self.processDelay);
                    } else {
                        self._change(e, files);
                    }
                    self.$dropZone.removeClass('file-highlighted');
                };
            e.preventDefault();
            if (self.isDisabled || $h.isEmpty(files)) {
                return;
            }
            if (!self._raise('fileDragDrop', {'sourceEvent': e, 'files': files})) {
                return;
            }
            if (folders > 0) {
                if (!self.isAjaxUpload) {
                    self._showFolderError(folders);
                    return;
                }
                files = [];
                for (i = 0; i < items.length; i++) {
                    var item = items[i].webkitGetAsEntry();
                    if (item) {
                        self._scanDroppedItems(item, files);
                    }
                }
                setTimeout(function () {
                    processFiles();
                }, 500);
            } else {
                processFiles();
            }
        },
        _uploadClick: function (e) {
            var self = this, $btn = self.$container.find('.fileinput-upload'), $form,
                isEnabled = !$btn.hasClass('disabled') && $h.isEmpty($btn.attr('disabled'));
            if (e && e.isDefaultPrevented()) {
                return;
            }
            if (!self.isAjaxUpload) {
                if (isEnabled && $btn.attr('type') !== 'submit') {
                    $form = $btn.closest('form');
                    // downgrade to normal form submit if possible
                    if ($form.length) {
                        $form.trigger('submit');
                    }
                    e.preventDefault();
                }
                return;
            }
            e.preventDefault();
            if (isEnabled) {
                self.upload();
            }
        },
        _submitForm: function () {
            var self = this;
            return self._isFileSelectionValid() && !self._abort({});
        },
        _clearPreview: function () {
            var self = this,
                $thumbs = self.showUploadedThumbs ? self.getFrames(':not(.file-preview-success)') : self.getFrames();
            $thumbs.each(function () {
                var $thumb = $(this), id = $thumb.attr('id'), $zoom = self._getZoom(id);
                $thumb.remove();
                $h.cleanZoomCache($zoom);
            });
            if (!self.getFrames().length || !self.showPreview) {
                self._resetUpload();
            }
            self._validateDefaultPreview();
        },
        _initSortable: function () {
            var self = this, $el = self.$preview, settings, selector = '.' + $h.SORT_CSS,
                rev = self.reversePreviewOrder;
            if (!window.KvSortable || $el.find(selector).length === 0) {
                return;
            }
            //noinspection JSUnusedGlobalSymbols
            settings = {
                handle: '.drag-handle-init',
                dataIdAttr: 'data-preview-id',
                scroll: false,
                draggable: selector,
                onSort: function (e) {
                    var oldIndex = e.oldIndex, newIndex = e.newIndex, i = 0;
                    self.initialPreview = $h.moveArray(self.initialPreview, oldIndex, newIndex, rev);
                    self.initialPreviewConfig = $h.moveArray(self.initialPreviewConfig, oldIndex, newIndex, rev);
                    self.previewCache.init();
                    self.getFrames('.file-preview-initial').each(function () {
                        $(this).attr('data-fileindex', $h.INIT_FLAG + i);
                        i++;
                    });
                    self._raise('filesorted', {
                        previewId: $(e.item).attr('id'),
                        'oldIndex': oldIndex,
                        'newIndex': newIndex,
                        stack: self.initialPreviewConfig
                    });
                }
            };
            if ($el.data('kvsortable')) {
                $el.kvsortable('destroy');
            }
            $.extend(true, settings, self.fileActionSettings.dragSettings);
            $el.kvsortable(settings);
        },
        _setPreviewContent: function (content) {
            var self = this;
            self.$preview.html(content);
            self._autoFitContent();
        },
        _initPreviewImageOrientations: function () {
            var self = this, i = 0;
            if (!self.autoOrientImageInitial) {
                return;
            }
            self.getFrames('.file-preview-initial').each(function () {
                var $thumb = $(this), $img, $zoomImg, id, config = self.initialPreviewConfig[i];
                /** @namespace config.exif */
                if (config && config.exif && config.exif.Orientation) {
                    id = $thumb.attr('id');
                    $img = $thumb.find('>.kv-file-content img');
                    $zoomImg = self._getZoom(id, ' >.kv-file-content img');
                    self.setImageOrientation($img, $zoomImg, config.exif.Orientation, $thumb);
                }
                i++;
            });
        },
        _initPreview: function (isInit) {
            var self = this, cap = self.initialCaption || '', out;
            if (!self.previewCache.count(true)) {
                self._clearPreview();
                if (isInit) {
                    self._setCaption(cap);
                } else {
                    self._initCaption();
                }
                return;
            }
            out = self.previewCache.out();
            cap = isInit && self.initialCaption ? self.initialCaption : out.caption;
            self._setPreviewContent(out.content);
            self._setInitThumbAttr();
            self._setCaption(cap);
            self._initSortable();
            if (!$h.isEmpty(out.content)) {
                self.$container.removeClass('file-input-new');
            }
            self._initPreviewImageOrientations();
        },
        _getZoomButton: function (type) {
            var self = this, label = self.previewZoomButtonIcons[type], css = self.previewZoomButtonClasses[type],
                title = ' title="' + (self.previewZoomButtonTitles[type] || '') + '" ',
                params = title + (type === 'close' ? ' data-dismiss="modal" aria-hidden="true"' : '');
            if (type === 'fullscreen' || type === 'borderless' || type === 'toggleheader') {
                params += ' data-toggle="button" aria-pressed="false" autocomplete="off"';
            }
            return '<button type="button" class="' + css + ' btn-' + type + '"' + params + '>' + label + '</button>';
        },
        _getModalContent: function () {
            var self = this;
            return self._getLayoutTemplate('modal').setTokens({
                'rtl': self.rtl ? ' kv-rtl' : '',
                'zoomFrameClass': self.frameClass,
                'heading': self.msgZoomModalHeading,
                'prev': self._getZoomButton('prev'),
                'next': self._getZoomButton('next'),
                'toggleheader': self._getZoomButton('toggleheader'),
                'fullscreen': self._getZoomButton('fullscreen'),
                'borderless': self._getZoomButton('borderless'),
                'close': self._getZoomButton('close')
            });
        },
        _listenModalEvent: function (event) {
            var self = this, $modal = self.$modal, getParams = function (e) {
                return {
                    sourceEvent: e,
                    previewId: $modal.data('previewId'),
                    modal: $modal
                };
            };
            $modal.on(event + '.bs.modal', function (e) {
                var $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless');
                self._raise('filezoom' + event, getParams(e));
                if (event === 'shown') {
                    $btnBord.removeClass('active').attr('aria-pressed', 'false');
                    $btnFull.removeClass('active').attr('aria-pressed', 'false');
                    if ($modal.hasClass('file-zoom-fullscreen')) {
                        self._maximizeZoomDialog();
                        if ($h.checkFullScreen()) {
                            $btnFull.addClass('active').attr('aria-pressed', 'true');
                        } else {
                            $btnBord.addClass('active').attr('aria-pressed', 'true');
                        }
                    }
                }
            });
        },
        _initZoom: function () {
            var self = this, $dialog, modalMain = self._getLayoutTemplate('modalMain'), modalId = '#' + $h.MODAL_ID;
            if (!self.showPreview) {
                return;
            }
            self.$modal = $(modalId);
            if (!self.$modal || !self.$modal.length) {
                $dialog = $(document.createElement('div')).html(modalMain).insertAfter(self.$container);
                self.$modal = $(modalId).insertBefore($dialog);
                $dialog.remove();
            }
            $h.initModal(self.$modal);
            self.$modal.html(self._getModalContent());
            $.each($h.MODAL_EVENTS, function (key, event) {
                self._listenModalEvent(event);
            });
        },
        _initZoomButtons: function () {
            var self = this, previewId = self.$modal.data('previewId') || '', $first, $last,
                thumbs = self.getFrames().toArray(), len = thumbs.length, $prev = self.$modal.find('.btn-prev'),
                $next = self.$modal.find('.btn-next');
            if (thumbs.length < 2) {
                $prev.hide();
                $next.hide();
                return;
            } else {
                $prev.show();
                $next.show();
            }
            if (!len) {
                return;
            }
            $first = $(thumbs[0]);
            $last = $(thumbs[len - 1]);
            $prev.removeAttr('disabled');
            $next.removeAttr('disabled');
            if ($first.length && $first.attr('id') === previewId) {
                $prev.attr('disabled', true);
            }
            if ($last.length && $last.attr('id') === previewId) {
                $next.attr('disabled', true);
            }
        },
        _maximizeZoomDialog: function () {
            var self = this, $modal = self.$modal, $head = $modal.find('.modal-header:visible'),
                $foot = $modal.find('.modal-footer:visible'), $body = $modal.find('.modal-body'),
                h = $(window).height(), diff = 0;
            $modal.addClass('file-zoom-fullscreen');
            if ($head && $head.length) {
                h -= $head.outerHeight(true);
            }
            if ($foot && $foot.length) {
                h -= $foot.outerHeight(true);
            }
            if ($body && $body.length) {
                diff = $body.outerHeight(true) - $body.height();
                h -= diff;
            }
            $modal.find('.kv-zoom-body').height(h);
        },
        _resizeZoomDialog: function (fullScreen) {
            var self = this, $modal = self.$modal, $btnFull = $modal.find('.btn-fullscreen'),
                $btnBord = $modal.find('.btn-borderless');
            if ($modal.hasClass('file-zoom-fullscreen')) {
                $h.toggleFullScreen(false);
                if (!fullScreen) {
                    if (!$btnFull.hasClass('active')) {
                        $modal.removeClass('file-zoom-fullscreen');
                        self.$modal.find('.kv-zoom-body').css('height', self.zoomModalHeight);
                    } else {
                        $btnFull.removeClass('active').attr('aria-pressed', 'false');
                    }
                } else {
                    if (!$btnFull.hasClass('active')) {
                        $modal.removeClass('file-zoom-fullscreen');
                        self._resizeZoomDialog(true);
                        if ($btnBord.hasClass('active')) {
                            $btnBord.removeClass('active').attr('aria-pressed', 'false');
                        }
                    }
                }
            } else {
                if (!fullScreen) {
                    self._maximizeZoomDialog();
                    return;
                }
                $h.toggleFullScreen(true);
            }
            $modal.focus();
        },
        _setZoomContent: function ($frame, animate) {
            var self = this, $content, tmplt, body, title, $body, $dataEl, config, previewId = $frame.attr('id'),
                $zoomPreview = self._getZoom(previewId), $modal = self.$modal, $tmp,
                $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless'), cap, size,
                $btnTogh = $modal.find('.btn-toggleheader');
            tmplt = $zoomPreview.attr('data-template') || 'generic';
            $content = $zoomPreview.find('.kv-file-content');
            body = $content.length ? $content.html() : '';
            cap = $frame.data('caption') || '';
            size = $frame.data('size') || '';
            title = cap + ' ' + size;
            $modal.find('.kv-zoom-title').attr('title', $('<div/>').html(title).text()).html(title);
            $body = $modal.find('.kv-zoom-body');
            $modal.removeClass('kv-single-content');
            if (animate) {
                $tmp = $body.addClass('file-thumb-loading').clone().insertAfter($body);
                $body.html(body).hide();
                $tmp.fadeOut('fast', function () {
                    $body.fadeIn('fast', function () {
                        $body.removeClass('file-thumb-loading');
                    });
                    $tmp.remove();
                });
            } else {
                $body.html(body);
            }
            config = self.previewZoomSettings[tmplt];
            if (config) {
                $dataEl = $body.find('.kv-preview-data');
                $h.addCss($dataEl, 'file-zoom-detail');
                $.each(config, function (key, value) {
                    $dataEl.css(key, value);
                    if (($dataEl.attr('width') && key === 'width') || ($dataEl.attr('height') && key === 'height')) {
                        $dataEl.removeAttr(key);
                    }
                });
            }
            $modal.data('previewId', previewId);
            self._handler($modal.find('.btn-prev'), 'click', function () {
                self._zoomSlideShow('prev', previewId);
            });
            self._handler($modal.find('.btn-next'), 'click', function () {
                self._zoomSlideShow('next', previewId);
            });
            self._handler($btnFull, 'click', function () {
                self._resizeZoomDialog(true);
            });
            self._handler($btnBord, 'click', function () {
                self._resizeZoomDialog(false);
            });
            self._handler($btnTogh, 'click', function () {
                var $header = $modal.find('.modal-header'), $floatBar = $modal.find('.modal-body .floating-buttons'),
                    ht, $actions = $header.find('.kv-zoom-actions'), resize = function (height) {
                        var $body = self.$modal.find('.kv-zoom-body'), h = self.zoomModalHeight;
                        if ($modal.hasClass('file-zoom-fullscreen')) {
                            h = $body.outerHeight(true);
                            if (!height) {
                                h = h - $header.outerHeight(true);
                            }
                        }
                        $body.css('height', height ? h + height : h);
                    };
                if ($header.is(':visible')) {
                    ht = $header.outerHeight(true);
                    $header.slideUp('slow', function () {
                        $actions.find('.btn').appendTo($floatBar);
                        resize(ht);
                    });
                } else {
                    $floatBar.find('.btn').appendTo($actions);
                    $header.slideDown('slow', function () {
                        resize();
                    });
                }
                $modal.focus();
            });
            self._handler($modal, 'keydown', function (e) {
                var key = e.which || e.keyCode, $prev = $(this).find('.btn-prev'), $next = $(this).find('.btn-next'),
                    vId = $(this).data('previewId'), vPrevKey = self.rtl ? 39 : 37, vNextKey = self.rtl ? 37 : 39;
                if (key === vPrevKey && $prev.length && !$prev.attr('disabled')) {
                    self._zoomSlideShow('prev', vId);
                }
                if (key === vNextKey && $next.length && !$next.attr('disabled')) {
                    self._zoomSlideShow('next', vId);
                }
            });
        },
        _zoomPreview: function ($btn) {
            var self = this, $frame, $modal = self.$modal;
            if (!$btn.length) {
                throw 'Cannot zoom to detailed preview!';
            }
            $h.initModal($modal);
            $modal.html(self._getModalContent());
            $frame = $btn.closest($h.FRAMES);
            self._setZoomContent($frame);
            $modal.modal('show');
            self._initZoomButtons();
        },
        _zoomSlideShow: function (dir, previewId) {
            var self = this, $btn = self.$modal.find('.kv-zoom-actions .btn-' + dir), $targFrame, i,
                thumbs = self.getFrames().toArray(), len = thumbs.length, out;
            if ($btn.attr('disabled')) {
                return;
            }
            for (i = 0; i < len; i++) {
                if ($(thumbs[i]).attr('id') === previewId) {
                    out = dir === 'prev' ? i - 1 : i + 1;
                    break;
                }
            }
            if (out < 0 || out >= len || !thumbs[out]) {
                return;
            }
            $targFrame = $(thumbs[out]);
            if ($targFrame.length) {
                self._setZoomContent($targFrame, true);
            }
            self._initZoomButtons();
            self._raise('filezoom' + dir, {'previewId': previewId, modal: self.$modal});
        },
        _initZoomButton: function () {
            var self = this;
            self.$preview.find('.kv-file-zoom').each(function () {
                var $el = $(this);
                self._handler($el, 'click', function () {
                    self._zoomPreview($el);
                });
            });
        },
        _inputFileCount: function () {
            return this.$element.get(0).files.length;
        },
        _refreshPreview: function () {
            var self = this, files;
            if ((!self._inputFileCount() && !self.isAjaxUpload) || !self.showPreview || !self.isPreviewable) {
                return;
            }
            if (self.isAjaxUpload) {
                if (self.fileManager.count() > 0) {
                    files = $.extend(true, {}, self.fileManager.stack);
                    self.fileManager.clear();
                    self._clearFileInput();
                } else {
                    files = self.$element.get(0).files;
                }
            } else {
                files = self.$element.get(0).files;
            }
            if (files && files.length) {
                self.readFiles(files);
                self._setFileDropZoneTitle();
            }
        },
        _clearObjects: function ($el) {
            $el.find('video audio').each(function () {
                this.pause();
                $(this).remove();
            });
            $el.find('img object div').each(function () {
                $(this).remove();
            });
        },
        _clearFileInput: function () {
            var self = this, $el = self.$element, $srcFrm, $tmpFrm, $tmpEl;
            if (!self._inputFileCount()) {
                return;
            }
            $srcFrm = $el.closest('form');
            $tmpFrm = $(document.createElement('form'));
            $tmpEl = $(document.createElement('div'));
            $el.before($tmpEl);
            if ($srcFrm.length) {
                $srcFrm.after($tmpFrm);
            } else {
                $tmpEl.after($tmpFrm);
            }
            $tmpFrm.append($el).trigger('reset');
            $tmpEl.before($el).remove();
            $tmpFrm.remove();
        },
        _resetUpload: function () {
            var self = this;
            self.uploadCache = [];
            self.$btnUpload.removeAttr('disabled');
            self._setProgress(0);
            self.$progress.hide();
            self._resetErrors(false);
            self._initAjax();
            self.fileManager.clearImages();
            self._resetCanvas();
            if (self.overwriteInitial) {
                self.initialPreview = [];
                self.initialPreviewConfig = [];
                self.initialPreviewThumbTags = [];
                self.previewCache.data = {
                    content: [],
                    config: [],
                    tags: []
                };
            }
        },
        _resetCanvas: function () {
            var self = this;
            if (self.canvas && self.imageCanvasContext) {
                self.imageCanvasContext.clearRect(0, 0, self.canvas.width, self.canvas.height);
            }
        },
        _hasInitialPreview: function () {
            var self = this;
            return !self.overwriteInitial && self.previewCache.count(true);
        },
        _resetPreview: function () {
            var self = this, out, cap;
            if (self.previewCache.count(true)) {
                out = self.previewCache.out();
                self._setPreviewContent(out.content);
                self._setInitThumbAttr();
                cap = self.initialCaption ? self.initialCaption : out.caption;
                self._setCaption(cap);
            } else {
                self._clearPreview();
                self._initCaption();
            }
            if (self.showPreview) {
                self._initZoom();
                self._initSortable();
            }
        },
        _clearDefaultPreview: function () {
            var self = this;
            self.$preview.find('.file-default-preview').remove();
        },
        _validateDefaultPreview: function () {
            var self = this;
            if (!self.showPreview || $h.isEmpty(self.defaultPreviewContent)) {
                return;
            }
            self._setPreviewContent('<div class="file-default-preview">' + self.defaultPreviewContent + '</div>');
            self.$container.removeClass('file-input-new');
            self._initClickable();
        },
        _resetPreviewThumbs: function (isAjax) {
            var self = this, out;
            if (isAjax) {
                self._clearPreview();
                self.clearFileStack();
                return;
            }
            if (self._hasInitialPreview()) {
                out = self.previewCache.out();
                self._setPreviewContent(out.content);
                self._setInitThumbAttr();
                self._setCaption(out.caption);
                self._initPreviewActions();
            } else {
                self._clearPreview();
            }
        },
        _getLayoutTemplate: function (t) {
            var self = this, template = self.layoutTemplates[t];
            if ($h.isEmpty(self.customLayoutTags)) {
                return template;
            }
            return $h.replaceTags(template, self.customLayoutTags);
        },
        _getPreviewTemplate: function (t) {
            var self = this, templates = self.previewTemplates, template = templates[t] || templates.other;
            if ($h.isEmpty(self.customPreviewTags)) {
                return template;
            }
            return $h.replaceTags(template, self.customPreviewTags);
        },
        _getOutData: function (formdata, jqXHR, responseData, filesData) {
            var self = this;
            jqXHR = jqXHR || {};
            responseData = responseData || {};
            filesData = filesData || self.fileManager.list();
            return {
                formdata: formdata,
                files: filesData,
                filenames: self.filenames,
                filescount: self.getFilesCount(),
                extra: self._getExtraData(),
                response: responseData,
                reader: self.reader,
                jqXHR: jqXHR
            };
        },
        _getMsgSelected: function (n) {
            var self = this, strFiles = n === 1 ? self.fileSingle : self.filePlural;
            return n > 0 ? self.msgSelected.replace('{n}', n).replace('{files}', strFiles) : self.msgNoFilesSelected;
        },
        _getFrame: function (id, skipWarning) {
            var self = this, $frame = $h.getFrameElement(self.$preview, id);
            if (self.showPreview && !skipWarning && !$frame.length) {
                self._log($h.logMessages.invalidThumb, {id: id});
            }
            return $frame;
        },
        _getZoom: function (id, selector) {
            var self = this, $frame = $h.getZoomElement(self.$preview, id, selector);
            if (self.showPreview && !$frame.length) {
                self._log($h.logMessages.invalidThumb, {id: id});
            }
            return $frame;
        },
        _getThumbs: function (css) {
            css = css || '';
            return this.getFrames(':not(.file-preview-initial)' + css);
        },
        _getThumbId: function (fileId) {
            var self = this;
            return self.previewInitId + '-' + fileId;
        },
        _getExtraData: function (fileId, index) {
            var self = this, data = self.uploadExtraData;
            if (typeof self.uploadExtraData === 'function') {
                data = self.uploadExtraData(fileId, index);
            }
            return data;
        },
        _initXhr: function (xhrobj, fileId, fileCount) {
            var self = this, fm = self.fileManager, func = function (event) {
                var pct = 0, total = event.total, loaded = event.loaded || event.position,
                    stats = fm.getUploadStats(fileId, loaded, total);
                /** @namespace event.lengthComputable */
                if (event.lengthComputable && !self.enableResumableUpload) {
                    pct = $h.round(loaded / total * 100);
                }
                if (fileId) {
                    self._setFileUploadStats(fileId, pct, fileCount, stats);
                } else {
                    self._setProgress(pct, null, null, self._getStats(stats));
                }
                self._raise('fileajaxprogress', [stats]);
            };
            if (xhrobj.upload) {
                if (self.progressDelay) {
                    func = $h.debounce(func, self.progressDelay);
                }
                xhrobj.upload.addEventListener('progress', func, false);
            }
            return xhrobj;
        },
        _initAjaxSettings: function () {
            var self = this;
            self._ajaxSettings = $.extend(true, {}, self.ajaxSettings);
            self._ajaxDeleteSettings = $.extend(true, {}, self.ajaxDeleteSettings);
        },
        _mergeAjaxCallback: function (funcName, srcFunc, type) {
            var self = this, settings = self._ajaxSettings, flag = self.mergeAjaxCallbacks, targFunc;
            if (type === 'delete') {
                settings = self._ajaxDeleteSettings;
                flag = self.mergeAjaxDeleteCallbacks;
            }
            targFunc = settings[funcName];
            if (flag && typeof targFunc === 'function') {
                if (flag === 'before') {
                    settings[funcName] = function () {
                        targFunc.apply(this, arguments);
                        srcFunc.apply(this, arguments);
                    };
                } else {
                    settings[funcName] = function () {
                        srcFunc.apply(this, arguments);
                        targFunc.apply(this, arguments);
                    };
                }
            } else {
                settings[funcName] = srcFunc;
            }
        },
        _ajaxSubmit: function (fnBefore, fnSuccess, fnComplete, fnError, formdata, fileId, index, vUrl) {
            var self = this, settings, defaults, data, processQueue;
            if (!self._raise('filepreajax', [formdata, fileId, index])) {
                return;
            }
            formdata.append('initialPreview', JSON.stringify(self.initialPreview));
            formdata.append('initialPreviewConfig', JSON.stringify(self.initialPreviewConfig));
            formdata.append('initialPreviewThumbTags', JSON.stringify(self.initialPreviewThumbTags));
            self._initAjaxSettings();
            self._mergeAjaxCallback('beforeSend', fnBefore);
            self._mergeAjaxCallback('success', fnSuccess);
            self._mergeAjaxCallback('complete', fnComplete);
            self._mergeAjaxCallback('error', fnError);
            vUrl = vUrl || self.uploadUrlThumb || self.uploadUrl;
            if (typeof vUrl === 'function') {
                vUrl = vUrl();
            }
            data = self._getExtraData(fileId, index) || {};
            if (typeof data === 'object') {
                $.each(data, function (key, value) {
                    formdata.append(key, value);
                });
            }
            defaults = {
                xhr: function () {
                    var xhrobj = $.ajaxSettings.xhr();
                    return self._initXhr(xhrobj, fileId, self.fileManager.count());
                },
                url: self._encodeURI(vUrl),
                type: 'POST',
                dataType: 'json',
                data: formdata,
                cache: false,
                processData: false,
                contentType: false
            };
            settings = $.extend(true, {}, defaults, self._ajaxSettings);
            self.ajaxQueue.push(settings);
            processQueue = function () {
                var config, xhr;
                if (self.ajaxCurrentThreads < self.maxAjaxThreads) {
                    config = self.ajaxQueue.shift();
                    if (typeof config !== 'undefined') {
                        self.ajaxCurrentThreads++;
                        xhr = $.ajax(config).done(function () {
                            clearInterval(self.ajaxQueueIntervalId);
                            self.ajaxCurrentThreads--;
                        });
                        self.ajaxRequests.push(xhr);
                    }
                }
            };
            self.ajaxQueueIntervalId = setInterval(processQueue, self.queueDelay);

        },
        _mergeArray: function (prop, content) {
            var self = this, arr1 = $h.cleanArray(self[prop]), arr2 = $h.cleanArray(content);
            self[prop] = arr1.concat(arr2);
        },
        _initUploadSuccess: function (out, $thumb, allFiles) {
            var self = this, append, data, index, $div, $newCache, content, config, tags, id, i;
            if (!self.showPreview || typeof out !== 'object' || $.isEmptyObject(out)) {
                return;
            }
            if (out.initialPreview !== undefined && out.initialPreview.length > 0) {
                self.hasInitData = true;
                content = out.initialPreview || [];
                config = out.initialPreviewConfig || [];
                tags = out.initialPreviewThumbTags || [];
                append = out.append === undefined || out.append;
                if (content.length > 0 && !$h.isArray(content)) {
                    content = content.split(self.initialPreviewDelimiter);
                }
                if (content.length) {
                    self._mergeArray('initialPreview', content);
                    self._mergeArray('initialPreviewConfig', config);
                    self._mergeArray('initialPreviewThumbTags', tags);
                }
                if ($thumb !== undefined) {
                    if (!allFiles) {
                        index = self.previewCache.add(content[0], config[0], tags[0], append);
                        data = self.previewCache.get(index, false);
                        $div = $(document.createElement('div')).html(data).hide().insertAfter($thumb);
                        $newCache = $div.find('.kv-zoom-cache');
                        if ($newCache && $newCache.length) {
                            $newCache.insertAfter($thumb);
                        }
                        $thumb.fadeOut('slow', function () {
                            var $newThumb = $div.find('.file-preview-frame');
                            if ($newThumb && $newThumb.length) {
                                $newThumb.insertBefore($thumb).fadeIn('slow').css('display:inline-block');
                            }
                            self._initPreviewActions();
                            self._clearFileInput();
                            $h.cleanZoomCache(self._getZoom($thumb.attr('id')));
                            $thumb.remove();
                            $div.remove();
                            self._initSortable();
                        });
                    } else {
                        id = $thumb.attr('id');
                        i = self._getUploadCacheIndex(id);
                        if (i !== null) {
                            self.uploadCache[i] = {
                                id: id,
                                content: content[0],
                                config: config[0] || [],
                                tags: tags[0] || [],
                                append: append
                            };
                        }
                    }
                } else {
                    self.previewCache.set(content, config, tags, append);
                    self._initPreview();
                    self._initPreviewActions();
                }
            }
        },
        _getUploadCacheIndex: function (id) {
            var self = this, i, len = self.uploadCache.length, config;
            for (i = 0; i < len; i++) {
                config = self.uploadCache[i];
                if (config.id === id) {
                    return i;
                }
            }
            return null;
        },
        _initSuccessThumbs: function () {
            var self = this;
            if (!self.showPreview) {
                return;
            }
            self._getThumbs($h.FRAMES + '.file-preview-success').each(function () {
                var $thumb = $(this), $remove = $thumb.find('.kv-file-remove');
                $remove.removeAttr('disabled');
                self._handler($remove, 'click', function () {
                    var id = $thumb.attr('id'),
                        out = self._raise('filesuccessremove', [id, $thumb.attr('data-fileindex')]);
                    $h.cleanMemory($thumb);
                    if (out === false) {
                        return;
                    }
                    $thumb.fadeOut('slow', function () {
                        $h.cleanZoomCache(self._getZoom(id));
                        $thumb.remove();
                        if (!self.getFrames().length) {
                            self.reset();
                        }
                    });
                });
            });
        },
        _updateInitialPreview: function () {
            var self = this, u = self.uploadCache;
            if (self.showPreview) {
                $.each(u, function (key, setting) {
                    self.previewCache.add(setting.content, setting.config, setting.tags, setting.append);
                });
                if (self.hasInitData) {
                    self._initPreview();
                    self._initPreviewActions();
                }
            }
        },
        _uploadSingle: function (i, id, isBatch) {
            var self = this, fm = self.fileManager, count = fm.count(), formdata = new FormData(), outData,
                previewId = self._getThumbId(id), $thumb, chkComplete, $btnUpload, $btnDelete,
                hasPostData = count > 0 || !$.isEmptyObject(self.uploadExtraData), uploadFailed, $prog, fnBefore,
                errMsg, fnSuccess, fnComplete, fnError, updateUploadLog, op = self.ajaxOperations.uploadThumb,
                fileObj = fm.getFile(id), params = {id: previewId, index: i, fileId: id},
                fileName = self.fileManager.getFileName(id, true);
            if (self.enableResumableUpload) { // not enabled for resumable uploads
                return;
            }
            if (self.showPreview) {
                $thumb = self.fileManager.getThumb(id);
                $prog = $thumb.find('.file-thumb-progress');
                $btnUpload = $thumb.find('.kv-file-upload');
                $btnDelete = $thumb.find('.kv-file-remove');
                $prog.show();
            }
            if (count === 0 || !hasPostData || (self.showPreview && $btnUpload && $btnUpload.hasClass('disabled')) ||
                self._abort(params)) {
                return;
            }
            updateUploadLog = function () {
                if (!uploadFailed) {
                    fm.removeFile(id);
                } else {
                    fm.errors.push(id);
                }
                fm.setProcessed(id);
                if (fm.isProcessed()) {
                    self.fileBatchCompleted = true;
                }
            };
            chkComplete = function () {
                var $initThumbs;
                if (!self.fileBatchCompleted) {
                    return;
                }
                setTimeout(function () {
                    var triggerReset = fm.count() === 0, errCount = fm.errors.length;
                    self._updateInitialPreview();
                    self.unlock(triggerReset);
                    if (triggerReset) {
                        self._clearFileInput();
                    }
                    $initThumbs = self.$preview.find('.file-preview-initial');
                    if (self.uploadAsync && $initThumbs.length) {
                        $h.addCss($initThumbs, $h.SORT_CSS);
                        self._initSortable();
                    }
                    self._raise('filebatchuploadcomplete', [fm.stack, self._getExtraData()]);
                    if (!self.retryErrorUploads || errCount === 0) {
                        fm.clear();
                    }
                    self._setProgress(101);
                    self.ajaxAborted = false;
                }, self.processDelay);
            };
            fnBefore = function (jqXHR) {
                outData = self._getOutData(formdata, jqXHR);
                fm.initStats(id);
                self.fileBatchCompleted = false;
                if (!isBatch) {
                    self.ajaxAborted = false;
                }
                if (self.showPreview) {
                    if (!$thumb.hasClass('file-preview-success')) {
                        self._setThumbStatus($thumb, 'Loading');
                        $h.addCss($thumb, 'file-uploading');
                    }
                    $btnUpload.attr('disabled', true);
                    $btnDelete.attr('disabled', true);
                }
                if (!isBatch) {
                    self.lock();
                }
                if (fm.errors.indexOf(id) !== -1) {
                    delete fm.errors[id];
                }
                self._raise('filepreupload', [outData, previewId, i]);
                $.extend(true, params, outData);
                if (self._abort(params)) {
                    jqXHR.abort();
                    if (!isBatch) {
                        self._setThumbStatus($thumb, 'New');
                        $thumb.removeClass('file-uploading');
                        $btnUpload.removeAttr('disabled');
                        $btnDelete.removeAttr('disabled');
                        self.unlock();
                    }
                    self._setProgressCancelled();
                }
            };
            fnSuccess = function (data, textStatus, jqXHR) {
                var pid = self.showPreview && $thumb.attr('id') ? $thumb.attr('id') : previewId;
                outData = self._getOutData(formdata, jqXHR, data);
                $.extend(true, params, outData);
                setTimeout(function () {
                    if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                        if (self.showPreview) {
                            self._setThumbStatus($thumb, 'Success');
                            $btnUpload.hide();
                            self._initUploadSuccess(data, $thumb, isBatch);
                            self._setProgress(101, $prog);
                        }
                        self._raise('fileuploaded', [outData, pid, i]);
                        if (!isBatch) {
                            self.fileManager.remove($thumb);
                        } else {
                            updateUploadLog();
                        }
                    } else {
                        uploadFailed = true;
                        errMsg = self._parseError(op, jqXHR, self.msgUploadError, self.fileManager.getFileName(id));
                        self._showFileError(errMsg, params);
                        self._setPreviewError($thumb, true);
                        if (!self.retryErrorUploads) {
                            $btnUpload.hide();
                        }
                        if (isBatch) {
                            updateUploadLog();
                        }
                        self._setProgress(101, self._getFrame(pid).find('.file-thumb-progress'),
                            self.msgUploadError);
                    }
                }, self.processDelay);
            };
            fnComplete = function () {
                setTimeout(function () {
                    if (self.showPreview) {
                        $btnUpload.removeAttr('disabled');
                        $btnDelete.removeAttr('disabled');
                        $thumb.removeClass('file-uploading');
                    }
                    if (!isBatch) {
                        self.unlock(false);
                        self._clearFileInput();
                    } else {
                        chkComplete();
                    }
                    self._initSuccessThumbs();
                }, self.processDelay);
            };
            fnError = function (jqXHR, textStatus, errorThrown) {
                errMsg = self._parseError(op, jqXHR, errorThrown, self.fileManager.getFileName(id));
                uploadFailed = true;
                setTimeout(function () {
                    var $prog;
                    if (isBatch) {
                        updateUploadLog();
                    }
                    self.fileManager.setProgress(id, 100);
                    self._setPreviewError($thumb, true);
                    if (!self.retryErrorUploads) {
                        $btnUpload.hide();
                    }
                    $.extend(true, params, self._getOutData(formdata, jqXHR));
                    self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
                    $prog = self.showPreview && $thumb ? $thumb.find('.file-thumb-progress') : '';
                    self._setProgress(101, $prog, self.msgUploadError);
                    self._showFileError(errMsg, params);
                }, self.processDelay);
            };
            formdata.append(self.uploadFileAttr, fileObj.file, fileName);
            self._setUploadData(formdata, {fileId: id});
            self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata, id, i);
        },
        _uploadBatch: function () {
            var self = this, fm = self.fileManager, total = fm.total(), params = {}, fnBefore, fnSuccess, fnError,
                fnComplete, hasPostData = total > 0 || !$.isEmptyObject(self.uploadExtraData), errMsg,
                setAllUploaded, formdata = new FormData(), op = self.ajaxOperations.uploadBatch;
            if (total === 0 || !hasPostData || self._abort(params)) {
                return;
            }
            setAllUploaded = function () {
                self.fileManager.clear();
                self._clearFileInput();
            };
            fnBefore = function (jqXHR) {
                self.lock();
                fm.initStats();
                var outData = self._getOutData(formdata, jqXHR);
                self.ajaxAborted = false;
                if (self.showPreview) {
                    self._getThumbs().each(function () {
                        var $thumb = $(this), $btnUpload = $thumb.find('.kv-file-upload'),
                            $btnDelete = $thumb.find('.kv-file-remove');
                        if (!$thumb.hasClass('file-preview-success')) {
                            self._setThumbStatus($thumb, 'Loading');
                            $h.addCss($thumb, 'file-uploading');
                        }
                        $btnUpload.attr('disabled', true);
                        $btnDelete.attr('disabled', true);
                    });
                }
                self._raise('filebatchpreupload', [outData]);
                if (self._abort(outData)) {
                    jqXHR.abort();
                    self._getThumbs().each(function () {
                        var $thumb = $(this), $btnUpload = $thumb.find('.kv-file-upload'),
                            $btnDelete = $thumb.find('.kv-file-remove');
                        if ($thumb.hasClass('file-preview-loading')) {
                            self._setThumbStatus($thumb, 'New');
                            $thumb.removeClass('file-uploading');
                        }
                        $btnUpload.removeAttr('disabled');
                        $btnDelete.removeAttr('disabled');
                    });
                    self._setProgressCancelled();
                }
            };
            fnSuccess = function (data, textStatus, jqXHR) {
                /** @namespace data.errorkeys */
                var outData = self._getOutData(formdata, jqXHR, data), key = 0,
                    $thumbs = self._getThumbs(':not(.file-preview-success)'),
                    keys = $h.isEmpty(data) || $h.isEmpty(data.errorkeys) ? [] : data.errorkeys;

                if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                    self._raise('filebatchuploadsuccess', [outData]);
                    setAllUploaded();
                    if (self.showPreview) {
                        $thumbs.each(function () {
                            var $thumb = $(this);
                            self._setThumbStatus($thumb, 'Success');
                            $thumb.removeClass('file-uploading');
                            $thumb.find('.kv-file-upload').hide().removeAttr('disabled');
                        });
                        self._initUploadSuccess(data);
                    } else {
                        self.reset();
                    }
                    self._setProgress(101);
                } else {
                    if (self.showPreview) {
                        $thumbs.each(function () {
                            var $thumb = $(this);
                            $thumb.removeClass('file-uploading');
                            $thumb.find('.kv-file-upload').removeAttr('disabled');
                            $thumb.find('.kv-file-remove').removeAttr('disabled');
                            if (keys.length === 0 || $.inArray(key, keys) !== -1) {
                                self._setPreviewError($thumb, true);
                                if (!self.retryErrorUploads) {
                                    $thumb.find('.kv-file-upload').hide();
                                    self.fileManager.remove($thumb);
                                }
                            } else {
                                $thumb.find('.kv-file-upload').hide();
                                self._setThumbStatus($thumb, 'Success');
                                self.fileManager.remove($thumb);
                            }
                            if (!$thumb.hasClass('file-preview-error') || self.retryErrorUploads) {
                                key++;
                            }
                        });
                        self._initUploadSuccess(data);
                    }
                    errMsg = self._parseError(op, jqXHR, self.msgUploadError);
                    self._showFileError(errMsg, outData, 'filebatchuploaderror');
                    self._setProgress(101, self.$progress, self.msgUploadError);
                }
            };
            fnComplete = function () {
                self.unlock();
                self._initSuccessThumbs();
                self._clearFileInput();
                self._raise('filebatchuploadcomplete', [self.fileManager.stack, self._getExtraData()]);
            };
            fnError = function (jqXHR, textStatus, errorThrown) {
                var outData = self._getOutData(formdata, jqXHR);
                errMsg = self._parseError(op, jqXHR, errorThrown);
                self._showFileError(errMsg, outData, 'filebatchuploaderror');
                self.uploadFileCount = total - 1;
                if (!self.showPreview) {
                    return;
                }
                self._getThumbs().each(function () {
                    var $thumb = $(this);
                    $thumb.removeClass('file-uploading');
                    if (self.fileManager.getFile($thumb.attr('data-fileid'))) {
                        self._setPreviewError($thumb);
                    }
                });
                self._getThumbs().removeClass('file-uploading');
                self._getThumbs(' .kv-file-upload').removeAttr('disabled');
                self._getThumbs(' .kv-file-delete').removeAttr('disabled');
                self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
            };
            var ctr = 0;
            $.each(self.fileManager.stack, function (key, data) {
                if (!$h.isEmpty(data.file)) {
                    formdata.append(self.uploadFileAttr, data.file, (data.nameFmt || ('untitled_' + ctr)));
                }
                ctr++;
            });
            self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata);
        },
        _uploadExtraOnly: function () {
            var self = this, params = {}, fnBefore, fnSuccess, fnComplete, fnError, formdata = new FormData(), errMsg,
                op = self.ajaxOperations.uploadExtra;
            if (self._abort(params)) {
                return;
            }
            fnBefore = function (jqXHR) {
                self.lock();
                var outData = self._getOutData(formdata, jqXHR);
                self._raise('filebatchpreupload', [outData]);
                self._setProgress(50);
                params.data = outData;
                params.xhr = jqXHR;
                if (self._abort(params)) {
                    jqXHR.abort();
                    self._setProgressCancelled();
                }
            };
            fnSuccess = function (data, textStatus, jqXHR) {
                var outData = self._getOutData(formdata, jqXHR, data);
                if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                    self._raise('filebatchuploadsuccess', [outData]);
                    self._clearFileInput();
                    self._initUploadSuccess(data);
                    self._setProgress(101);
                } else {
                    errMsg = self._parseError(op, jqXHR, self.msgUploadError);
                    self._showFileError(errMsg, outData, 'filebatchuploaderror');
                }
            };
            fnComplete = function () {
                self.unlock();
                self._clearFileInput();
                self._raise('filebatchuploadcomplete', [self.fileManager.stack, self._getExtraData()]);
            };
            fnError = function (jqXHR, textStatus, errorThrown) {
                var outData = self._getOutData(formdata, jqXHR);
                errMsg = self._parseError(op, jqXHR, errorThrown);
                params.data = outData;
                self._showFileError(errMsg, outData, 'filebatchuploaderror');
                self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
            };
            self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata);
        },
        _deleteFileIndex: function ($frame) {
            var self = this, ind = $frame.attr('data-fileindex'), rev = self.reversePreviewOrder;
            if (ind.substring(0, 5) === $h.INIT_FLAG) {
                ind = parseInt(ind.replace($h.INIT_FLAG, ''));
                self.initialPreview = $h.spliceArray(self.initialPreview, ind, rev);
                self.initialPreviewConfig = $h.spliceArray(self.initialPreviewConfig, ind, rev);
                self.initialPreviewThumbTags = $h.spliceArray(self.initialPreviewThumbTags, ind, rev);
                self.getFrames().each(function () {
                    var $nFrame = $(this), nInd = $nFrame.attr('data-fileindex');
                    if (nInd.substring(0, 5) === $h.INIT_FLAG) {
                        nInd = parseInt(nInd.replace($h.INIT_FLAG, ''));
                        if (nInd > ind) {
                            nInd--;
                            $nFrame.attr('data-fileindex', $h.INIT_FLAG + nInd);
                        }
                    }
                });
            }
        },
        _initFileActions: function () {
            var self = this;
            if (!self.showPreview) {
                return;
            }
            self._initZoomButton();
            self.getFrames(' .kv-file-remove').each(function () {
                var $el = $(this), $frame = $el.closest($h.FRAMES), hasError, id = $frame.attr('id'),
                    ind = $frame.attr('data-fileindex'), n, cap, status;
                self._handler($el, 'click', function () {
                    status = self._raise('filepreremove', [id, ind]);
                    if (status === false || !self._validateMinCount()) {
                        return false;
                    }
                    hasError = $frame.hasClass('file-preview-error');
                    $h.cleanMemory($frame);
                    $frame.fadeOut('slow', function () {
                        $h.cleanZoomCache(self._getZoom(id));
                        self.fileManager.remove($frame);
                        self._clearObjects($frame);
                        $frame.remove();
                        if (id && hasError) {
                            self.$errorContainer.find('li[data-thumb-id="' + id + '"]').fadeOut('fast', function () {
                                $(this).remove();
                                if (!self._errorsExist()) {
                                    self._resetErrors();
                                }
                            });
                        }
                        self._clearFileInput();
                        var chk = self.previewCache.count(true), len = self.fileManager.count(),
                            file, hasThumb = self.showPreview && self.getFrames().length;
                        if (len === 0 && chk === 0 && !hasThumb) {
                            self.reset();
                        } else {
                            n = chk + len;
                            if (n > 1) {
                                cap = self._getMsgSelected(n);
                            } else {
                                file = self.fileManager.getFirstFile();
                                cap = file ? file.nameFmt : '_';
                            }
                            self._setCaption(cap);
                        }
                        self._raise('fileremoved', [id, ind]);
                    });
                });
            });
            self.getFrames(' .kv-file-upload').each(function () {
                var $el = $(this);
                self._handler($el, 'click', function () {
                    var $frame = $el.closest($h.FRAMES), fileId = $frame.attr('data-fileid');
                    self.$progress.hide();
                    if ($frame.hasClass('file-preview-error') && !self.retryErrorUploads) {
                        return;
                    }
                    self._uploadSingle(self.fileManager.getIndex(fileId), fileId, false);
                });
            });
        },
        _initPreviewActions: function () {
            var self = this, $preview = self.$preview, deleteExtraData = self.deleteExtraData || {},
                btnRemove = $h.FRAMES + ' .kv-file-remove', settings = self.fileActionSettings,
                origClass = settings.removeClass, errClass = settings.removeErrorClass,
                resetProgress = function () {
                    var hasFiles = self.isAjaxUpload ? self.previewCache.count(true) : self._inputFileCount();
                    if (!self.getFrames().length && !hasFiles) {
                        self._setCaption('');
                        self.reset();
                        self.initialCaption = '';
                    }
                };
            self._initZoomButton();
            $preview.find(btnRemove).each(function () {
                var $el = $(this), vUrl = $el.data('url') || self.deleteUrl, vKey = $el.data('key'), errMsg, fnBefore,
                    fnSuccess, fnError, op = self.ajaxOperations.deleteThumb;
                if ($h.isEmpty(vUrl) || vKey === undefined) {
                    return;
                }
                if (typeof vUrl === 'function') {
                    vUrl = vUrl();
                }
                var $frame = $el.closest($h.FRAMES), cache = self.previewCache.data, settings, params, config,
                    fileName, extraData, index = $frame.attr('data-fileindex');
                index = parseInt(index.replace($h.INIT_FLAG, ''));
                config = $h.isEmpty(cache.config) && $h.isEmpty(cache.config[index]) ? null : cache.config[index];
                extraData = $h.isEmpty(config) || $h.isEmpty(config.extra) ? deleteExtraData : config.extra;
                fileName = config.filename || config.caption || '';
                if (typeof extraData === 'function') {
                    extraData = extraData();
                }
                params = {id: $el.attr('id'), key: vKey, extra: extraData};
                fnBefore = function (jqXHR) {
                    self.ajaxAborted = false;
                    self._raise('filepredelete', [vKey, jqXHR, extraData]);
                    if (self._abort()) {
                        jqXHR.abort();
                    } else {
                        $el.removeClass(errClass);
                        $h.addCss($frame, 'file-uploading');
                        $h.addCss($el, 'disabled ' + origClass);
                    }
                };
                fnSuccess = function (data, textStatus, jqXHR) {
                    var n, cap;
                    if (!$h.isEmpty(data) && !$h.isEmpty(data.error)) {
                        params.jqXHR = jqXHR;
                        params.response = data;
                        errMsg = self._parseError(op, jqXHR, self.msgDeleteError, fileName);
                        self._showFileError(errMsg, params, 'filedeleteerror');
                        $frame.removeClass('file-uploading');
                        $el.removeClass('disabled ' + origClass).addClass(errClass);
                        resetProgress();
                        return;
                    }
                    $frame.removeClass('file-uploading').addClass('file-deleted');
                    $frame.fadeOut('slow', function () {
                        index = parseInt(($frame.attr('data-fileindex')).replace($h.INIT_FLAG, ''));
                        self.previewCache.unset(index);
                        self._deleteFileIndex($frame);
                        n = self.previewCache.count(true);
                        cap = n > 0 ? self._getMsgSelected(n) : '';
                        self._setCaption(cap);
                        self._raise('filedeleted', [vKey, jqXHR, extraData]);
                        $h.cleanZoomCache(self._getZoom($frame.attr('id')));
                        self._clearObjects($frame);
                        $frame.remove();
                        resetProgress();
                    });
                };
                fnError = function (jqXHR, textStatus, errorThrown) {
                    var errMsg = self._parseError(op, jqXHR, errorThrown, fileName);
                    params.jqXHR = jqXHR;
                    params.response = {};
                    self._showFileError(errMsg, params, 'filedeleteerror');
                    $frame.removeClass('file-uploading');
                    $el.removeClass('disabled ' + origClass).addClass(errClass);
                    resetProgress();
                };
                self._initAjaxSettings();
                self._mergeAjaxCallback('beforeSend', fnBefore, 'delete');
                self._mergeAjaxCallback('success', fnSuccess, 'delete');
                self._mergeAjaxCallback('error', fnError, 'delete');
                settings = $.extend(true, {}, {
                    url: self._encodeURI(vUrl),
                    type: 'POST',
                    dataType: 'json',
                    data: $.extend(true, {}, {key: vKey}, extraData)
                }, self._ajaxDeleteSettings);
                self._handler($el, 'click', function () {
                    if (!self._validateMinCount()) {
                        return false;
                    }
                    self.ajaxAborted = false;
                    self._raise('filebeforedelete', [vKey, extraData]);
                    //noinspection JSUnresolvedVariable,JSHint
                    if (self.ajaxAborted instanceof Promise) {
                        self.ajaxAborted.then(function (result) {
                            if (!result) {
                                $.ajax(settings);
                            }
                        });
                    } else {
                        if (!self.ajaxAborted) {
                            $.ajax(settings);
                        }
                    }
                });
            });
        },
        _hideFileIcon: function () {
            var self = this;
            if (self.overwriteInitial) {
                self.$captionContainer.removeClass('icon-visible');
            }
        },
        _showFileIcon: function () {
            var self = this;
            $h.addCss(self.$captionContainer, 'icon-visible');
        },
        _getSize: function (bytes, sizes) {
            var self = this, size = parseFloat(bytes), i, func = self.fileSizeGetter, out;
            if (!$.isNumeric(bytes) || !$.isNumeric(size)) {
                return '';
            }
            if (typeof func === 'function') {
                out = func(size);
            } else {
                if (size === 0) {
                    out = '0.00 B';
                } else {
                    i = Math.floor(Math.log(size) / Math.log(1024));
                    if (!sizes) {
                        sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                    }
                    out = (size / Math.pow(1024, i)).toFixed(2) * 1 + ' ' + sizes[i];
                }
            }
            return self._getLayoutTemplate('size').replace('{sizeText}', out);
        },
        _getFileType: function (ftype) {
            var self = this;
            return self.mimeTypeAliases[ftype] || ftype;
        },
        _generatePreviewTemplate: function (
            cat,
            data,
            fname,
            ftype,
            previewId,
            fileId,
            isError,
            size,
            frameClass,
            foot,
            ind,
            templ,
            attrs,
            zoomData
        ) {
            var self = this, caption = self.slug(fname), prevContent, zoomContent = '', styleAttribs = '',
                screenW = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                config, title = caption, alt = caption, typeCss = 'type-default', getContent,
                footer = foot || self._renderFileFooter(cat, caption, size, 'auto', isError),
                forcePrevIcon = self.preferIconicPreview, forceZoomIcon = self.preferIconicZoomPreview,
                newCat = forcePrevIcon ? 'other' : cat;
            config = screenW < 400 ? (self.previewSettingsSmall[newCat] || self.defaults.previewSettingsSmall[newCat]) :
                (self.previewSettings[newCat] || self.defaults.previewSettings[newCat]);
            if (config) {
                $.each(config, function (key, val) {
                    styleAttribs += key + ':' + val + ';';
                });
            }
            getContent = function (c, d, zoom, frameCss) {
                var id = zoom ? 'zoom-' + previewId : previewId, tmplt = self._getPreviewTemplate(c),
                    css = (frameClass || '') + ' ' + frameCss;
                if (self.frameClass) {
                    css = self.frameClass + ' ' + css;
                }
                if (zoom) {
                    css = css.replace(' ' + $h.SORT_CSS, '');
                }
                tmplt = self._parseFilePreviewIcon(tmplt, fname);
                if (c === 'text') {
                    d = $h.htmlEncode(d);
                }
                if (cat === 'object' && !ftype) {
                    $.each(self.defaults.fileTypeSettings, function (key, func) {
                        if (key === 'object' || key === 'other') {
                            return;
                        }
                        if (func(fname, ftype)) {
                            typeCss = 'type-' + key;
                        }
                    });
                }
                if (!$h.isEmpty(attrs)) {
                    if (attrs.title !== undefined && attrs.title !== null) {
                        title = attrs.title;
                    }
                    if (attrs.alt !== undefined && attrs.alt !== null) {
                        title = attrs.alt;
                    }
                }
                return tmplt.setTokens({
                    'previewId': id,
                    'caption': caption,
                    'title': title,
                    'alt': alt,
                    'frameClass': css,
                    'type': self._getFileType(ftype),
                    'fileindex': ind,
                    'fileid': fileId || '',
                    'typeCss': typeCss,
                    'footer': footer,
                    'data': d,
                    'template': templ || cat,
                    'style': styleAttribs ? 'style="' + styleAttribs + '"' : ''
                });
            };
            ind = ind || previewId.slice(previewId.lastIndexOf('-') + 1);
            if (self.fileActionSettings.showZoom) {
                zoomContent = getContent((forceZoomIcon ? 'other' : cat), zoomData ? zoomData : data, true,
                    'kv-zoom-thumb');
            }
            zoomContent = '\n' + self._getLayoutTemplate('zoomCache').replace('{zoomContent}', zoomContent);
            if (typeof self.sanitizeZoomCache === 'function') {
                zoomContent = self.sanitizeZoomCache(zoomContent);
            }
            prevContent = getContent((forcePrevIcon ? 'other' : cat), data, false, 'kv-preview-thumb');
            return prevContent + zoomContent;
        },
        _addToPreview: function ($preview, content) {
            var self = this;
            return self.reversePreviewOrder ? $preview.prepend(content) : $preview.append(content);
        },
        _previewDefault: function (file, isDisabled) {
            var self = this, $preview = self.$preview;
            if (!self.showPreview) {
                return;
            }
            var fname = $h.getFileName(file), ftype = file ? file.type : '', content, size = file.size || 0,
                caption = self._getFileName(file, ''), isError = isDisabled === true && !self.isAjaxUpload,
                data = $h.createObjectURL(file), fileId = self.fileManager.getId(file),
                previewId = self._getThumbId(fileId);
            self._clearDefaultPreview();
            content = self._generatePreviewTemplate('other', data, fname, ftype, previewId, fileId, isError, size);
            self._addToPreview($preview, content);
            self._setThumbAttr(previewId, caption, size);
            if (isDisabled === true && self.isAjaxUpload) {
                self._setThumbStatus(self._getFrame(previewId), 'Error');
            }
        },
        _previewFile: function (i, file, theFile, data, fileInfo) {
            if (!this.showPreview) {
                return;
            }
            var self = this, fname = $h.getFileName(file), ftype = fileInfo.type, caption = fileInfo.name,
                cat = self._parseFileType(ftype, fname), content, $preview = self.$preview, fsize = file.size || 0,
                iData = (cat === 'text' || cat === 'html' || cat === 'image') ? theFile.target.result : data,
                fileId = self.fileManager.getId(file), previewId = self._getThumbId(fileId);
            /** @namespace window.DOMPurify */
            if (cat === 'html' && self.purifyHtml && window.DOMPurify) {
                iData = window.DOMPurify.sanitize(iData);
            }
            content = self._generatePreviewTemplate(cat, iData, fname, ftype, previewId, fileId, false, fsize);
            self._clearDefaultPreview();
            self._addToPreview($preview, content);
            var $thumb = self._getFrame(previewId);
            self._validateImageOrientation($thumb.find('img'), file, previewId, fileId, caption, ftype, fsize, iData);
            self._setThumbAttr(previewId, caption, fsize);
            self._initSortable();
        },
        _setThumbAttr: function (id, caption, size) {
            var self = this, $frame = self._getFrame(id);
            if ($frame.length) {
                size = size && size > 0 ? self._getSize(size) : '';
                $frame.data({'caption': caption, 'size': size});
            }
        },
        _setInitThumbAttr: function () {
            var self = this, data = self.previewCache.data, len = self.previewCache.count(true), config,
                caption, size, previewId;
            if (len === 0) {
                return;
            }
            for (var i = 0; i < len; i++) {
                config = data.config[i];
                previewId = self.previewInitId + '-' + $h.INIT_FLAG + i;
                caption = $h.ifSet('caption', config, $h.ifSet('filename', config));
                size = $h.ifSet('size', config);
                self._setThumbAttr(previewId, caption, size);
            }
        },
        _slugDefault: function (text) {
            // noinspection RegExpRedundantEscape
            return $h.isEmpty(text) ? '' : String(text).replace(/[\[\]\/\{}:;#%=\(\)\*\+\?\\\^\$\|<>&"']/g, '_');
        },
        _updateFileDetails: function (numFiles) {
            var self = this, $el = self.$element, label, n, log, nFiles, file,
                name = ($h.isIE(9) && $h.findFileName($el.val())) || ($el[0].files[0] && $el[0].files[0].name);
            if (!name && self.fileManager.count() > 0) {
                file = self.fileManager.getFirstFile();
                label = file.nameFmt;
            } else {
                label = name ? self.slug(name) : '_';
            }
            n = self.isAjaxUpload ? self.fileManager.count() : numFiles;
            nFiles = self.previewCache.count(true) + n;
            log = n === 1 ? label : self._getMsgSelected(nFiles);
            if (self.isError) {
                self.$previewContainer.removeClass('file-thumb-loading');
                self.$previewStatus.html('');
                self.$captionContainer.removeClass('icon-visible');
            } else {
                self._showFileIcon();
            }
            self._setCaption(log, self.isError);
            self.$container.removeClass('file-input-new file-input-ajax-new');
            if (arguments.length === 1) {
                self._raise('fileselect', [numFiles, label]);
            }
            if (self.previewCache.count(true)) {
                self._initPreviewActions();
            }
        },
        _setThumbStatus: function ($thumb, status) {
            var self = this;
            if (!self.showPreview) {
                return;
            }
            var icon = 'indicator' + status, msg = icon + 'Title',
                css = 'file-preview-' + status.toLowerCase(),
                $indicator = $thumb.find('.file-upload-indicator'),
                config = self.fileActionSettings;
            $thumb.removeClass('file-preview-success file-preview-error file-preview-paused file-preview-loading');
            if (status === 'Success') {
                $thumb.find('.file-drag-handle').remove();
            }
            $indicator.html(config[icon]);
            $indicator.attr('title', config[msg]);
            $thumb.addClass(css);
            if (status === 'Error' && !self.retryErrorUploads) {
                $thumb.find('.kv-file-upload').attr('disabled', true);
            }
        },
        _setProgressCancelled: function () {
            var self = this;
            self._setProgress(101, self.$progress, self.msgCancelled);
        },
        _setProgress: function (p, $el, error, stats) {
            var self = this;
            $el = $el || self.$progress;
            if (!$el.length) {
                return;
            }
            var pct = Math.min(p, 100), out, pctLimit = self.progressUploadThreshold,
                t = p <= 100 ? self.progressTemplate : self.progressCompleteTemplate,
                template = pct < 100 ? self.progressTemplate :
                    (error ? (self.paused ? self.progressPauseTemplate : self.progressErrorTemplate) : t);
            if (p >= 100) {
                stats = '';
            }
            if (!$h.isEmpty(template)) {
                if (pctLimit && pct > pctLimit && p <= 100) {
                    out = template.setTokens({'percent': pctLimit, 'status': self.msgUploadThreshold});
                } else {
                    out = template.setTokens({'percent': pct, 'status': (p > 100 ? self.msgUploadEnd : pct + '%')});
                }
                stats = stats || '';
                out = out.setTokens({stats: stats});
                $el.html(out);
                if (error) {
                    $el.find('[role="progressbar"]').html(error);
                }
            }
        },
        _setFileDropZoneTitle: function () {
            var self = this, $zone = self.$container.find('.file-drop-zone'), title = self.dropZoneTitle, strFiles;
            if (self.isClickable) {
                strFiles = $h.isEmpty(self.$element.attr('multiple')) ? self.fileSingle : self.filePlural;
                title += self.dropZoneClickTitle.replace('{files}', strFiles);
            }
            $zone.find('.' + self.dropZoneTitleClass).remove();
            if (!self.showPreview || $zone.length === 0 || self.fileManager.count() > 0 || !self.dropZoneEnabled ||
                (!self.isAjaxUpload && self.$element.files)) {
                return;
            }
            if ($zone.find($h.FRAMES).length === 0 && $h.isEmpty(self.defaultPreviewContent)) {
                $zone.prepend('<div class="' + self.dropZoneTitleClass + '">' + title + '</div>');
            }
            self.$container.removeClass('file-input-new');
            $h.addCss(self.$container, 'file-input-ajax-new');
        },
        _getStats: function (stats) {
            var self = this, pendingTime, t;
            if (!self.showUploadStats || !stats || !stats.bitrate) {
                return '';
            }
            t = self._getLayoutTemplate('stats');
            pendingTime = (!stats.elapsed || !stats.bps) ? self.msgCalculatingTime :
                self.msgPendingTime.setTokens({time: $h.getElapsed(Math.ceil(stats.pendingBytes / stats.bps))});

            return t.setTokens({
                uploadSpeed: stats.bitrate,
                pendingTime: pendingTime
            });
        },
        _setResumableProgress: function (pct, stats, $thumb) {
            var self = this, rm = self.resumableManager, obj = $thumb ? rm : self,
                $prog = $thumb ? $thumb.find('.file-thumb-progress') : null;
            if (obj.lastProgress === 0) {
                obj.lastProgress = pct;
            }
            if (pct < obj.lastProgress) {
                pct = obj.lastProgress;
            }
            self._setProgress(pct, $prog, null, self._getStats(stats));
            obj.lastProgress = pct;
        },
        _setFileUploadStats: function (id, pct, total, stats) {
            var self = this, $prog = self.$progress;
            if (!self.showPreview && (!$prog || !$prog.length)) {
                return;
            }
            var fm = self.fileManager, $thumb = fm.getThumb(id), pctTot, rm = self.resumableManager,
                totUpSize = 0, totSize = fm.getTotalSize(), totStats = $.extend(true, {}, stats);
            if (self.enableResumableUpload) {
                var loaded = stats.loaded, currUplSize = rm.getUploadedSize(), currTotSize = rm.file.size, totLoaded;
                loaded += currUplSize;
                totLoaded = fm.uploadedSize + loaded;
                pct = $h.round(100 * loaded / currTotSize);
                stats.pendingBytes = currTotSize - currUplSize;
                self._setResumableProgress(pct, stats, $thumb);
                pctTot = Math.floor(100 * totLoaded / totSize);
                totStats.pendingBytes = totSize - totLoaded;
                self._setResumableProgress(pctTot, totStats);
            } else {
                fm.setProgress(id, pct);
                $prog = $thumb && $thumb.length ? $thumb.find('.file-thumb-progress') : null;
                self._setProgress(pct, $prog, null, self._getStats(stats));
                $.each(fm.stats, function (id, cfg) {
                    totUpSize += cfg.loaded;
                });
                totStats.pendingBytes = totSize - totUpSize;
                pctTot = $h.round(totUpSize / totSize * 100);
                self._setProgress(pctTot, null, null, self._getStats(totStats));
            }
        },
        _validateMinCount: function () {
            var self = this, len = self.isAjaxUpload ? self.fileManager.count() : self._inputFileCount();
            if (self.validateInitialCount && self.minFileCount > 0 && self._getFileCount(len - 1) < self.minFileCount) {
                self._noFilesError({});
                return false;
            }
            return true;
        },
        _getFileCount: function (fileCount, includeInitial) {
            var self = this, addCount = 0;
            if (includeInitial === undefined) {
                includeInitial = self.validateInitialCount && !self.overwriteInitial;
            }
            if (includeInitial) {
                addCount = self.previewCache.count(true);
                fileCount += addCount;
            }
            return fileCount;
        },
        _getFileId: function (file) {
            return $h.getFileId(file, this.generateFileId);
        },
        _getFileName: function (file, defaultValue) {
            var self = this, fileName = $h.getFileName(file);
            return fileName ? self.slug(fileName) : defaultValue;
        },
        _getFileNames: function (skipNull) {
            var self = this;
            return self.filenames.filter(function (n) {
                return (skipNull ? n !== undefined : n !== undefined && n !== null);
            });
        },
        _setPreviewError: function ($thumb, keepFile) {
            var self = this, removeFrame = self.removeFromPreviewOnError && !self.retryErrorUploads;
            if (!keepFile || removeFrame) {
                self.fileManager.remove($thumb);
            }
            if (!self.showPreview) {
                return;
            }
            if (removeFrame) {
                $thumb.remove();
                return;
            } else {
                self._setThumbStatus($thumb, 'Error');
            }
            self._refreshUploadButton($thumb);
        },
        _refreshUploadButton: function ($thumb) {
            var self = this, $btn = $thumb.find('.kv-file-upload'), cfg = self.fileActionSettings,
                icon = cfg.uploadIcon, title = cfg.uploadTitle;
            if (!$btn.length) {
                return;
            }
            if (self.retryErrorUploads) {
                icon = cfg.uploadRetryIcon;
                title = cfg.uploadRetryTitle;
            }
            $btn.attr('title', title).html(icon);
        },
        _checkDimensions: function (i, chk, $img, $thumb, fname, type, params) {
            var self = this, msg, dim, tag = chk === 'Small' ? 'min' : 'max', limit = self[tag + 'Image' + type],
                $imgEl, isValid;
            if ($h.isEmpty(limit) || !$img.length) {
                return;
            }
            $imgEl = $img[0];
            dim = (type === 'Width') ? $imgEl.naturalWidth || $imgEl.width : $imgEl.naturalHeight || $imgEl.height;
            isValid = chk === 'Small' ? dim >= limit : dim <= limit;
            if (isValid) {
                return;
            }
            msg = self['msgImage' + type + chk].setTokens({'name': fname, 'size': limit});
            self._showFileError(msg, params);
            self._setPreviewError($thumb);
        },
        _getExifObj: function (data) {
            var self = this, exifObj = null, error = $h.logMessages.exifWarning;
            if (data.slice(0, 23) !== 'data:image/jpeg;base64,' && data.slice(0, 22) !== 'data:image/jpg;base64,') {
                exifObj = null;
                return;
            }
            try {
                exifObj = window.piexif ? window.piexif.load(data) : null;
            } catch (err) {
                exifObj = null;
                error = err && err.message || '';
            }
            if (!exifObj) {
                self._log($h.logMessages.badExifParser, {details: error});
            }
            return exifObj;
        },
        setImageOrientation: function ($img, $zoomImg, value, $thumb) {
            var self = this, invalidImg = !$img || !$img.length, invalidZoomImg = !$zoomImg || !$zoomImg.length, $mark,
                isHidden = false, $div, zoomOnly = invalidImg && $thumb && $thumb.attr('data-template') === 'image', ev;
            if (invalidImg && invalidZoomImg) {
                return;
            }
            ev = 'load.fileinputimageorient';
            if (zoomOnly) {
                $img = $zoomImg;
                $zoomImg = null;
                $img.css(self.previewSettings.image);
                $div = $(document.createElement('div')).appendTo($thumb.find('.kv-file-content'));
                $mark = $(document.createElement('span')).insertBefore($img);
                $img.css('visibility', 'hidden').removeClass('file-zoom-detail').appendTo($div);
            } else {
                isHidden = !$img.is(':visible');
            }
            $img.off(ev).on(ev, function () {
                if (isHidden) {
                    self.$preview.removeClass('hide-content');
                    $thumb.find('.kv-file-content').css('visibility', 'hidden');
                }
                var img = $img.get(0), zoomImg = $zoomImg && $zoomImg.length ? $zoomImg.get(0) : null,
                    h = img.offsetHeight, w = img.offsetWidth, r = $h.getRotation(value);
                if (isHidden) {
                    $thumb.find('.kv-file-content').css('visibility', 'visible');
                    self.$preview.addClass('hide-content');
                }
                $img.data('orientation', value);
                if (zoomImg) {
                    $zoomImg.data('orientation', value);
                }
                if (value < 5) {
                    $h.setTransform(img, r);
                    $h.setTransform(zoomImg, r);
                    return;
                }
                var offsetAngle = Math.atan(w / h), origFactor = Math.sqrt(Math.pow(h, 2) + Math.pow(w, 2)),
                    scale = !origFactor ? 1 : (h / Math.cos(Math.PI / 2 + offsetAngle)) / origFactor,
                    s = ' scale(' + Math.abs(scale) + ')';
                $h.setTransform(img, r + s);
                $h.setTransform(zoomImg, r + s);
                if (zoomOnly) {
                    $img.css('visibility', 'visible').insertAfter($mark).addClass('file-zoom-detail');
                    $mark.remove();
                    $div.remove();
                }
            });
        },
        _validateImageOrientation: function ($img, file, previewId, fileId, caption, ftype, fsize, iData) {
            var self = this, exifObj, value, autoOrientImage = self.autoOrientImage,
                selector = $h.getZoomSelector(previewId, ' img');
            exifObj = autoOrientImage ? self._getExifObj(iData) : null;
            value = exifObj ? exifObj['0th'][piexif.ImageIFD.Orientation] : null; // jshint ignore:line
            if (!value) {
                self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
                return;
            }
            self.setImageOrientation($img, $(selector), value, self._getFrame(previewId));
            self._raise('fileimageoriented', {'$img': $img, 'file': file});
            self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
        },
        _validateImage: function (previewId, fileId, fname, ftype, fsize, iData, exifObj) {
            var self = this, $preview = self.$preview, params, w1, w2, $thumb = self._getFrame(previewId),
                i = $thumb.attr('data-fileindex'), $img = $thumb.find('img');
            fname = fname || 'Untitled';
            $img.one('load', function () {
                w1 = $thumb.width();
                w2 = $preview.width();
                if (w1 > w2) {
                    $img.css('width', '100%');
                }
                params = {ind: i, id: previewId, fileId: fileId};
                self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Width', params);
                self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Height', params);
                if (!self.resizeImage) {
                    self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Width', params);
                    self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Height', params);
                }
                self._raise('fileimageloaded', [previewId]);
                self.fileManager.addImage(fileId, {
                    ind: i,
                    img: $img,
                    thumb: $thumb,
                    pid: previewId,
                    typ: ftype,
                    siz: fsize,
                    validated: false,
                    imgData: iData,
                    exifObj: exifObj
                });
                $thumb.data('exif', exifObj);
                self._validateAllImages();
            }).one('error', function () {
                self._raise('fileimageloaderror', [previewId]);
            }).each(function () {
                if (this.complete) {
                    $(this).trigger('load');
                } else {
                    if (this.error) {
                        $(this).trigger('error');
                    }
                }
            });
        },
        _validateAllImages: function () {
            var self = this, counter = {val: 0}, numImgs = self.fileManager.getImageCount(), fsize,
                minSize = self.resizeIfSizeMoreThan;
            if (numImgs !== self.fileManager.totalImages) {
                return;
            }
            self._raise('fileimagesloaded');
            if (!self.resizeImage) {
                return;
            }
            $.each(self.fileManager.loadedImages, function (id, config) {
                if (!config.validated) {
                    fsize = config.siz;
                    if (fsize && fsize > minSize * 1000) {
                        self._getResizedImage(id, config, counter, numImgs);
                    }
                    config.validated = true;
                }
            });
        },
        _getResizedImage: function (id, config, counter, numImgs) {
            var self = this, img = $(config.img)[0], width = img.naturalWidth, height = img.naturalHeight, blob,
                ratio = 1, maxWidth = self.maxImageWidth || width, maxHeight = self.maxImageHeight || height,
                isValidImage = !!(width && height), chkWidth, chkHeight, canvas = self.imageCanvas, dataURI,
                context = self.imageCanvasContext, type = config.typ, pid = config.pid, ind = config.ind,
                $thumb = config.thumb, throwError, msg, exifObj = config.exifObj, exifStr, file, params, evParams;
            throwError = function (msg, params, ev) {
                if (self.isAjaxUpload) {
                    self._showFileError(msg, params, ev);
                } else {
                    self._showError(msg, params, ev);
                }
                self._setPreviewError($thumb);
            };
            file = self.fileManager.getFile(id);
            params = {id: pid, 'index': ind, fileId: id};
            evParams = [id, pid, ind];
            if (!file || !isValidImage || (width <= maxWidth && height <= maxHeight)) {
                if (isValidImage && file) {
                    self._raise('fileimageresized', evParams);
                }
                counter.val++;
                if (counter.val === numImgs) {
                    self._raise('fileimagesresized');
                }
                if (!isValidImage) {
                    throwError(self.msgImageResizeError, params, 'fileimageresizeerror');
                    return;
                }
            }
            type = type || self.resizeDefaultImageType;
            chkWidth = width > maxWidth;
            chkHeight = height > maxHeight;
            if (self.resizePreference === 'width') {
                ratio = chkWidth ? maxWidth / width : (chkHeight ? maxHeight / height : 1);
            } else {
                ratio = chkHeight ? maxHeight / height : (chkWidth ? maxWidth / width : 1);
            }
            self._resetCanvas();
            width *= ratio;
            height *= ratio;
            canvas.width = width;
            canvas.height = height;
            try {
                context.drawImage(img, 0, 0, width, height);
                dataURI = canvas.toDataURL(type, self.resizeQuality);
                if (exifObj) {
                    exifStr = window.piexif.dump(exifObj);
                    dataURI = window.piexif.insert(exifStr, dataURI);
                }
                blob = $h.dataURI2Blob(dataURI);
                self.fileManager.setFile(id, blob);
                self._raise('fileimageresized', evParams);
                counter.val++;
                if (counter.val === numImgs) {
                    self._raise('fileimagesresized', [undefined, undefined]);
                }
                if (!(blob instanceof Blob)) {
                    throwError(self.msgImageResizeError, params, 'fileimageresizeerror');
                }
            } catch (err) {
                counter.val++;
                if (counter.val === numImgs) {
                    self._raise('fileimagesresized', [undefined, undefined]);
                }
                msg = self.msgImageResizeException.replace('{errors}', err.message);
                throwError(msg, params, 'fileimageresizeexception');
            }
        },
        _initBrowse: function ($container) {
            var self = this, $el = self.$element;
            if (self.showBrowse) {
                self.$btnFile = $container.find('.btn-file').append($el);
            } else {
                $el.appendTo($container).attr('tabindex', -1);
                $h.addCss($el, 'file-no-browse');
            }
        },
        _initClickable: function () {
            var self = this, $zone, $tmpZone;
            if (!self.isClickable) {
                return;
            }
            $zone = self.$dropZone;
            if (!self.isAjaxUpload) {
                $tmpZone = self.$preview.find('.file-default-preview');
                if ($tmpZone.length) {
                    $zone = $tmpZone;
                }
            }

            $h.addCss($zone, 'clickable');
            $zone.attr('tabindex', -1);
            self._handler($zone, 'click', function (e) {
                var $tar = $(e.target);
                if (!$(self.elErrorContainer + ':visible').length &&
                    (!$tar.parents('.file-preview-thumbnails').length || $tar.parents(
                        '.file-default-preview').length)) {
                    self.$element.data('zoneClicked', true).trigger('click');
                    $zone.blur();
                }
            });
        },
        _initCaption: function () {
            var self = this, cap = self.initialCaption || '';
            if (self.overwriteInitial || $h.isEmpty(cap)) {
                self.$caption.val('');
                return false;
            }
            self._setCaption(cap);
            return true;
        },
        _setCaption: function (content, isError) {
            var self = this, title, out, icon, n, cap, file;
            if (!self.$caption.length) {
                return;
            }
            self.$captionContainer.removeClass('icon-visible');
            if (isError) {
                title = $('<div>' + self.msgValidationError + '</div>').text();
                n = self.fileManager.count();
                if (n) {
                    file = self.fileManager.getFirstFile();
                    cap = n === 1 && file ? file.nameFmt : self._getMsgSelected(n);
                } else {
                    cap = self._getMsgSelected(self.msgNo);
                }
                out = $h.isEmpty(content) ? cap : content;
                icon = '<span class="' + self.msgValidationErrorClass + '">' + self.msgValidationErrorIcon + '</span>';
            } else {
                if ($h.isEmpty(content)) {
                    return;
                }
                title = $('<div>' + content + '</div>').text();
                out = title;
                icon = self._getLayoutTemplate('fileIcon');
            }
            self.$captionContainer.addClass('icon-visible');
            self.$caption.attr('title', title).val(out);
            self.$captionIcon.html(icon);
        },
        _createContainer: function () {
            var self = this, attribs = {'class': 'file-input file-input-new' + (self.rtl ? ' kv-rtl' : '')},
                $container = $(document.createElement('div')).attr(attribs).html(self._renderMain());
            $container.insertBefore(self.$element);
            self._initBrowse($container);
            if (self.theme) {
                $container.addClass('theme-' + self.theme);
            }
            return $container;
        },
        _refreshContainer: function () {
            var self = this, $container = self.$container, $el = self.$element;
            $el.insertAfter($container);
            $container.html(self._renderMain());
            self._initBrowse($container);
            self._validateDisabled();
        },
        _validateDisabled: function () {
            var self = this;
            self.$caption.attr({readonly: self.isDisabled});
        },
        _renderMain: function () {
            var self = this,
                dropCss = self.dropZoneEnabled ? ' file-drop-zone' : 'file-drop-disabled',
                close = !self.showClose ? '' : self._getLayoutTemplate('close'),
                preview = !self.showPreview ? '' : self._getLayoutTemplate('preview')
                    .setTokens({'class': self.previewClass, 'dropClass': dropCss}),
                css = self.isDisabled ? self.captionClass + ' file-caption-disabled' : self.captionClass,
                caption = self.captionTemplate.setTokens({'class': css + ' kv-fileinput-caption'});
            return self.mainTemplate.setTokens({
                'class': self.mainClass + (!self.showBrowse && self.showCaption ? ' no-browse' : ''),
                'preview': preview,
                'close': close,
                'caption': caption,
                'upload': self._renderButton('upload'),
                'remove': self._renderButton('remove'),
                'cancel': self._renderButton('cancel'),
                'pause': self._renderButton('pause'),
                'browse': self._renderButton('browse')
            });

        },
        _renderButton: function (type) {
            var self = this, tmplt = self._getLayoutTemplate('btnDefault'), css = self[type + 'Class'],
                title = self[type + 'Title'], icon = self[type + 'Icon'], label = self[type + 'Label'],
                status = self.isDisabled ? ' disabled' : '', btnType = 'button';
            switch (type) {
                case 'remove':
                    if (!self.showRemove) {
                        return '';
                    }
                    break;
                case 'cancel':
                    if (!self.showCancel) {
                        return '';
                    }
                    css += ' kv-hidden';
                    break;
                case 'pause':
                    if (!self.showPause) {
                        return '';
                    }
                    css += ' kv-hidden';
                    break;
                case 'upload':
                    if (!self.showUpload) {
                        return '';
                    }
                    if (self.isAjaxUpload && !self.isDisabled) {
                        tmplt = self._getLayoutTemplate('btnLink').replace('{href}', self.uploadUrl);
                    } else {
                        btnType = 'submit';
                    }
                    break;
                case 'browse':
                    if (!self.showBrowse) {
                        return '';
                    }
                    tmplt = self._getLayoutTemplate('btnBrowse');
                    break;
                default:
                    return '';
            }

            css += type === 'browse' ? ' btn-file' : ' fileinput-' + type + ' fileinput-' + type + '-button';
            if (!$h.isEmpty(label)) {
                label = ' <span class="' + self.buttonLabelClass + '">' + label + '</span>';
            }
            return tmplt.setTokens({
                'type': btnType, 'css': css, 'title': title, 'status': status, 'icon': icon, 'label': label
            });
        },
        _renderThumbProgress: function () {
            var self = this;
            return '<div class="file-thumb-progress kv-hidden">' +
                self.progressInfoTemplate.setTokens({percent: 101, status: self.msgUploadBegin, stats: ''}) +
                '</div>';
        },
        _renderFileFooter: function (cat, caption, size, width, isError) {
            var self = this, config = self.fileActionSettings, rem = config.showRemove, drg = config.showDrag,
                upl = config.showUpload, zoom = config.showZoom, out, params,
                template = self._getLayoutTemplate('footer'), tInd = self._getLayoutTemplate('indicator'),
                ind = isError ? config.indicatorError : config.indicatorNew,
                title = isError ? config.indicatorErrorTitle : config.indicatorNewTitle,
                indicator = tInd.setTokens({'indicator': ind, 'indicatorTitle': title});
            size = self._getSize(size);
            params = {type: cat, caption: caption, size: size, width: width, progress: '', indicator: indicator};
            if (self.isAjaxUpload) {
                params.progress = self._renderThumbProgress();
                params.actions = self._renderFileActions(params, upl, false, rem, zoom, drg, false, false, false);
            } else {
                params.actions = self._renderFileActions(params, false, false, false, zoom, drg, false, false, false);
            }
            out = template.setTokens(params);
            out = $h.replaceTags(out, self.previewThumbTags);
            return out;
        },
        _renderFileActions: function (
            cfg,
            showUpl,
            showDwn,
            showDel,
            showZoom,
            showDrag,
            disabled,
            url,
            key,
            isInit,
            dUrl,
            dFile
        ) {
            var self = this;
            if (!cfg.type && isInit) {
                cfg.type = 'image';
            }
            if (self.enableResumableUpload) {
                showUpl = false;
            } else {
                if (typeof showUpl === 'function') {
                    showUpl = showUpl(cfg);
                }
            }
            if (typeof showDwn === 'function') {
                showDwn = showDwn(cfg);
            }
            if (typeof showDel === 'function') {
                showDel = showDel(cfg);
            }
            if (typeof showZoom === 'function') {
                showZoom = showZoom(cfg);
            }
            if (typeof showDrag === 'function') {
                showDrag = showDrag(cfg);
            }
            if (!showUpl && !showDwn && !showDel && !showZoom && !showDrag) {
                return '';
            }
            var vUrl = url === false ? '' : ' data-url="' + url + '"', btnZoom = '', btnDrag = '', css,
                vKey = key === false ? '' : ' data-key="' + key + '"', btnDelete = '', btnUpload = '', btnDownload = '',
                template = self._getLayoutTemplate('actions'), config = self.fileActionSettings,
                otherButtons = self.otherActionButtons.setTokens({'dataKey': vKey, 'key': key}),
                removeClass = disabled ? config.removeClass + ' disabled' : config.removeClass;
            if (showDel) {
                btnDelete = self._getLayoutTemplate('actionDelete').setTokens({
                    'removeClass': removeClass,
                    'removeIcon': config.removeIcon,
                    'removeTitle': config.removeTitle,
                    'dataUrl': vUrl,
                    'dataKey': vKey,
                    'key': key
                });
            }
            if (showUpl) {
                btnUpload = self._getLayoutTemplate('actionUpload').setTokens({
                    'uploadClass': config.uploadClass,
                    'uploadIcon': config.uploadIcon,
                    'uploadTitle': config.uploadTitle
                });
            }
            if (showDwn) {
                btnDownload = self._getLayoutTemplate('actionDownload').setTokens({
                    'downloadClass': config.downloadClass,
                    'downloadIcon': config.downloadIcon,
                    'downloadTitle': config.downloadTitle,
                    'downloadUrl': dUrl || self.initialPreviewDownloadUrl
                });
                btnDownload = btnDownload.setTokens({'filename': dFile, 'key': key});
            }
            if (showZoom) {
                btnZoom = self._getLayoutTemplate('actionZoom').setTokens({
                    'zoomClass': config.zoomClass,
                    'zoomIcon': config.zoomIcon,
                    'zoomTitle': config.zoomTitle
                });
            }
            if (showDrag && isInit) {
                css = 'drag-handle-init ' + config.dragClass;
                btnDrag = self._getLayoutTemplate('actionDrag').setTokens({
                    'dragClass': css,
                    'dragTitle': config.dragTitle,
                    'dragIcon': config.dragIcon
                });
            }
            return template.setTokens({
                'delete': btnDelete,
                'upload': btnUpload,
                'download': btnDownload,
                'zoom': btnZoom,
                'drag': btnDrag,
                'other': otherButtons
            });
        },
        _browse: function (e) {
            var self = this;
            if (e && e.isDefaultPrevented() || !self._raise('filebrowse')) {
                return;
            }
            if (self.isError && !self.isAjaxUpload) {
                self.clear();
            }
            if (self.focusCaptionOnBrowse) {
                self.$captionContainer.focus();
            }
        },
        _change: function (e) {
            var self = this;
            if (self.changeTriggered) {
                return;
            }
            var $el = self.$element, isDragDrop = arguments.length > 1, isAjaxUpload = self.isAjaxUpload,
                tfiles, files = isDragDrop ? arguments[1] : $el.get(0).files, ctr = self.fileManager.count(),
                total, initCount, len, isSingleUpl = $h.isEmpty($el.attr('multiple')),
                maxCount = !isAjaxUpload && isSingleUpl ? 1 : self.maxFileCount, maxTotCount = self.maxTotalFileCount,
                inclAll = maxTotCount > 0 && maxTotCount > maxCount, flagSingle = (isSingleUpl && ctr > 0),
                throwError = function (mesg, file, previewId, index) {
                    var p1 = $.extend(true, {}, self._getOutData(null, {}, {}, files), {id: previewId, index: index}),
                        p2 = {id: previewId, index: index, file: file, files: files};
                    return isAjaxUpload ? self._showFileError(mesg, p1) : self._showError(mesg, p2);
                },
                maxCountCheck = function (n, m, all) {
                    var msg = all ? self.msgTotalFilesTooMany : self.msgFilesTooMany;
                    msg = msg.replace('{m}', m).replace('{n}', n);
                    self.isError = throwError(msg, null, null, null);
                    self.$captionContainer.removeClass('icon-visible');
                    self._setCaption('', true);
                    self.$container.removeClass('file-input-new file-input-ajax-new');
                };
            self.reader = null;
            self._resetUpload();
            self._hideFileIcon();
            if (self.dropZoneEnabled) {
                self.$container.find('.file-drop-zone .' + self.dropZoneTitleClass).remove();
            }
            if (!isAjaxUpload) {
                if (e.target && e.target.files === undefined) {
                    files = e.target.value ? [{name: e.target.value.replace(/^.+\\/, '')}] : [];
                } else {
                    files = e.target.files || {};
                }
            }
            tfiles = files;
            if ($h.isEmpty(tfiles) || tfiles.length === 0) {
                if (!isAjaxUpload) {
                    self.clear();
                }
                self._raise('fileselectnone');
                return;
            }
            self._resetErrors();
            len = tfiles.length;
            initCount = isAjaxUpload ? (self.fileManager.count() + len) : len;
            total = self._getFileCount(initCount, inclAll ? false : undefined);
            if (maxCount > 0 && total > maxCount) {
                if (!self.autoReplace || len > maxCount) {
                    maxCountCheck((self.autoReplace && len > maxCount ? len : total), maxCount);
                    return;
                }
                if (total > maxCount) {
                    self._resetPreviewThumbs(isAjaxUpload);
                }
            } else {
                if (inclAll) {
                    total = self._getFileCount(initCount, true);
                    if (maxTotCount > 0 && total > maxTotCount) {
                        if (!self.autoReplace || len > maxCount) {
                            maxCountCheck((self.autoReplace && len > maxTotCount ? len : total), maxTotCount, true);
                            return;
                        }
                        if (total > maxCount) {
                            self._resetPreviewThumbs(isAjaxUpload);
                        }
                    }
                }
                if (!isAjaxUpload || flagSingle) {
                    self._resetPreviewThumbs(false);
                    if (flagSingle) {
                        self.clearFileStack();
                    }
                } else {
                    if (isAjaxUpload && ctr === 0 && (!self.previewCache.count(true) || self.overwriteInitial)) {
                        self._resetPreviewThumbs(true);
                    }
                }
            }
            self.readFiles(tfiles);
        },
        _abort: function (params) {
            var self = this, data;
            if (self.ajaxAborted && typeof self.ajaxAborted === 'object' && self.ajaxAborted.message !== undefined) {
                data = $.extend(true, {}, self._getOutData(null), params);
                data.abortData = self.ajaxAborted.data || {};
                data.abortMessage = self.ajaxAborted.message;
                self._setProgress(101, self.$progress, self.msgCancelled);
                self._showFileError(self.ajaxAborted.message, data, 'filecustomerror');
                self.cancel();
                return true;
            }
            return !!self.ajaxAborted;
        },
        _resetFileStack: function () {
            var self = this, i = 0;
            self._getThumbs().each(function () {
                var $thumb = $(this), ind = $thumb.attr('data-fileindex'), pid = $thumb.attr('id');
                if (ind === '-1' || ind === -1) {
                    return;
                }
                if (!self.fileManager.getFile($thumb.attr('data-fileid'))) {
                    $thumb.attr({'data-fileindex': i});
                    i++;
                } else {
                    $thumb.attr({'data-fileindex': '-1'});
                }
                self._getZoom(pid).attr({
                    'data-fileindex': $thumb.attr('data-fileindex')
                });
            });
        },
        _isFileSelectionValid: function (cnt) {
            var self = this;
            cnt = cnt || 0;
            if (self.required && !self.getFilesCount()) {
                self.$errorContainer.html('');
                self._showFileError(self.msgFileRequired);
                return false;
            }
            if (self.minFileCount > 0 && self._getFileCount(cnt) < self.minFileCount) {
                self._noFilesError({});
                return false;
            }
            return true;
        },
        _canPreview: function (file) {
            var self = this;
            if (!file || !self.showPreview || !self.$preview || !self.$preview.length) {
                return false;
            }
            var name = file.name || '', type = file.type || '', size = (file.size || 0) / 1000,
                cat = self._parseFileType(type, name), allowedTypes, allowedMimes, allowedExts, skipPreview,
                types = self.allowedPreviewTypes, mimes = self.allowedPreviewMimeTypes,
                exts = self.allowedPreviewExtensions || [], dTypes = self.disabledPreviewTypes,
                dMimes = self.disabledPreviewMimeTypes, dExts = self.disabledPreviewExtensions || [],
                maxSize = self.maxFilePreviewSize && parseFloat(self.maxFilePreviewSize) || 0,
                expAllExt = new RegExp('\\.(' + exts.join('|') + ')$', 'i'),
                expDisExt = new RegExp('\\.(' + dExts.join('|') + ')$', 'i');
            allowedTypes = !types || types.indexOf(cat) !== -1;
            allowedMimes = !mimes || mimes.indexOf(type) !== -1;
            allowedExts = !exts.length || $h.compare(name, expAllExt);
            skipPreview = (dTypes && dTypes.indexOf(cat) !== -1) || (dMimes && dMimes.indexOf(type) !== -1) ||
                (dExts.length && $h.compare(name, expDisExt)) || (maxSize && !isNaN(maxSize) && size > maxSize);
            return !skipPreview && (allowedTypes || allowedMimes || allowedExts);
        },
        addToStack: function (file, id) {
            this.fileManager.add(file, id);
        },
        clearFileStack: function () {
            var self = this;
            self.fileManager.clear();
            self._initResumableUpload();
            if (self.enableResumableUpload) {
                if (self.showPause === null) {
                    self.showPause = true;
                }
                if (self.showCancel === null) {
                    self.showCancel = false;
                }
            } else {
                self.showPause = false;
                if (self.showCancel === null) {
                    self.showCancel = true;
                }
            }
            return self.$element;
        },
        getFileStack: function () {
            return this.fileManager.stack;
        },
        getFileList: function () {
            return this.fileManager.list();
        },
        getFilesCount: function () {
            var self = this, len = self.isAjaxUpload ? self.fileManager.count() : self._inputFileCount();
            return self._getFileCount(len);
        },
        readFiles: function (files) {
            this.reader = new FileReader();
            var self = this, $el = self.$element, reader = self.reader, $container = self.$previewContainer,
                $status = self.$previewStatus, msgLoading = self.msgLoading, msgProgress = self.msgProgress,
                previewInitId = self.previewInitId, numFiles = files.length, settings = self.fileTypeSettings,
                readFile, fileTypes = self.allowedFileTypes, typLen = fileTypes ? fileTypes.length : 0,
                fileExt = self.allowedFileExtensions, strExt = $h.isEmpty(fileExt) ? '' : fileExt.join(', '),
                throwError = function (msg, file, previewId, index, fileId, removeThumb) {
                    var p1 = $.extend(true, {}, self._getOutData(null, {}, {}, files),
                        {id: previewId, index: index, fileId: fileId}), $thumb,
                        p2 = {id: previewId, index: index, fileId: fileId, file: file, files: files};
                    removeThumb = removeThumb || self.removeFromPreviewOnError;
                    if (!removeThumb) {
                        self._previewDefault(file, true);
                    }
                    $thumb = self._getFrame(previewId, true);
                    if (self.isAjaxUpload) {
                        setTimeout(function () {
                            readFile(index + 1);
                        }, self.processDelay);
                    } else {
                        self.unlock();
                        numFiles = 0;
                    }
                    if (removeThumb && $thumb.length) {
                        $thumb.remove();
                    } else {
                        self._initFileActions();
                        $thumb.find('.kv-file-upload').remove();
                    }
                    self.isError = self.isAjaxUpload ? self._showFileError(msg, p1) : self._showError(msg, p2);
                    self._updateFileDetails(numFiles);
                };
            self.fileManager.clearImages();
            $.each(files, function (key, file) {
                var func = self.fileTypeSettings.image;
                if (func && func(file.type)) {
                    self.fileManager.totalImages++;
                }
            });
            readFile = function (i) {
                var $error = self.$errorContainer, errors;
                if ($h.isEmpty($el.attr('multiple'))) {
                    numFiles = 1;
                }
                if (i >= numFiles) {
                    self.unlock();
                    if (self.duplicateErrors.length) {
                        errors = '<li>' + self.duplicateErrors.join('</li><li>') + '</li>';
                        if ($error.find('ul').length === 0) {
                            $error.html('<ul>' + errors + '</ul>');
                        } else {
                            $error.find('ul').append(errors);
                        }
                        $error.fadeIn(800);
                        self.duplicateErrors = [];
                    }
                    if (self.isAjaxUpload && self.fileManager.count() > 0) {
                        self._raise('filebatchselected', [self.fileManager.stack]);
                    } else {
                        self._raise('filebatchselected', [files]);
                    }
                    $container.removeClass('file-thumb-loading');
                    $status.html('');
                    return;
                }
                self.lock(true);
                var file = files[i], previewId = previewInitId + '-' + self._getFileId(file), fSizeKB, j, msg,
                    fnText = settings.text, fnImage = settings.image, fnHtml = settings.html, typ, chk, typ1, typ2,
                    caption = self._getFileName(file, ''), fileSize = (file && file.size || 0) / 1000,
                    fileExtExpr = '', previewData = $h.createObjectURL(file), fileCount = 0,
                    strTypes = '', fileId,
                    func, knownTypes = 0, isText, isHtml, isImage, txtFlag, processFileLoaded = function () {
                        var msg = msgProgress.setTokens({
                            'index': i + 1,
                            'files': numFiles,
                            'percent': 50,
                            'name': caption
                        });
                        setTimeout(function () {
                            $status.html(msg);
                            self._updateFileDetails(numFiles);
                            readFile(i + 1);
                        }, self.processDelay);
                        self._raise('fileloaded', [file, previewId, i, reader]);
                    };
                if (!file) {
                    return;
                }
                fileId = self.fileManager.getId(file);
                if (typLen > 0) {
                    for (j = 0; j < typLen; j++) {
                        typ1 = fileTypes[j];
                        typ2 = self.msgFileTypes[typ1] || typ1;
                        strTypes += j === 0 ? typ2 : ', ' + typ2;
                    }
                }
                if (caption === false) {
                    readFile(i + 1);
                    return;
                }
                if (caption.length === 0) {
                    msg = self.msgInvalidFileName.replace('{name}', $h.htmlEncode($h.getFileName(file), '[unknown]'));
                    throwError(msg, file, previewId, i, fileId);
                    return;
                }
                if (!$h.isEmpty(fileExt)) {
                    fileExtExpr = new RegExp('\\.(' + fileExt.join('|') + ')$', 'i');
                }
                fSizeKB = fileSize.toFixed(2);
                if (self.isAjaxUpload && self.fileManager.exists(fileId) || self._getFrame(previewId, true).length) {
                    var p2 = {id: previewId, index: i, fileId: fileId, file: file, files: files};
                    msg = self.msgDuplicateFile.setTokens({name: caption, size: fSizeKB});
                    if (self.isAjaxUpload) {
                        setTimeout(function () {
                            self.duplicateErrors.push(msg);
                            readFile(i + 1);
                            self._updateFileDetails(numFiles);
                        }, self.processDelay);
                    } else {
                        self._showError(msg, p2);
                        self.unlock();
                        numFiles = 0;
                        self._clearFileInput();
                        self.reset();
                        self._updateFileDetails(numFiles);
                    }
                    return;
                }
                if (self.maxFileSize > 0 && fileSize > self.maxFileSize) {
                    msg = self.msgSizeTooLarge.setTokens({
                        'name': caption,
                        'size': fSizeKB,
                        'maxSize': self.maxFileSize
                    });
                    throwError(msg, file, previewId, i, fileId);
                    return;
                }
                if (self.minFileSize !== null && fileSize <= $h.getNum(self.minFileSize)) {
                    msg = self.msgSizeTooSmall.setTokens({
                        'name': caption,
                        'size': fSizeKB,
                        'minSize': self.minFileSize
                    });
                    throwError(msg, file, previewId, i, fileId);
                    return;
                }
                if (!$h.isEmpty(fileTypes) && $h.isArray(fileTypes)) {
                    for (j = 0; j < fileTypes.length; j += 1) {
                        typ = fileTypes[j];
                        func = settings[typ];
                        fileCount += !func || (typeof func !== 'function') ? 0 : (func(file.type,
                            $h.getFileName(file)) ? 1 : 0);
                    }
                    if (fileCount === 0) {
                        msg = self.msgInvalidFileType.setTokens({name: caption, types: strTypes});
                        throwError(msg, file, previewId, i, fileId);
                        return;
                    }
                }
                if (fileCount === 0 && !$h.isEmpty(fileExt) && $h.isArray(fileExt) && !$h.isEmpty(fileExtExpr)) {
                    chk = $h.compare(caption, fileExtExpr);
                    fileCount += $h.isEmpty(chk) ? 0 : chk.length;
                    if (fileCount === 0) {
                        msg = self.msgInvalidFileExtension.setTokens({name: caption, extensions: strExt});
                        throwError(msg, file, previewId, i, fileId);
                        return;
                    }
                }
                if (!self._canPreview(file)) {
                    if (self.isAjaxUpload) {
                        self.fileManager.add(file);
                    }
                    if (self.showPreview) {
                        $container.addClass('file-thumb-loading');
                        self._previewDefault(file);
                        self._initFileActions();
                    }
                    setTimeout(function () {
                        self._updateFileDetails(numFiles);
                        readFile(i + 1);
                        self._raise('fileloaded', [file, previewId, i]);
                    }, 10);
                    return;
                }
                isText = fnText(file.type, caption);
                isHtml = fnHtml(file.type, caption);
                isImage = fnImage(file.type, caption);
                $status.html(msgLoading.replace('{index}', i + 1).replace('{files}', numFiles));
                $container.addClass('file-thumb-loading');
                reader.onerror = function (evt) {
                    self._errorHandler(evt, caption);
                };
                reader.onload = function (theFile) {
                    var hex, fileInfo, uint, byte, bytes = [], contents, mime, readTextImage = function (textFlag) {
                        var newReader = new FileReader();
                        newReader.onerror = function (theFileNew) {
                            self._errorHandler(theFileNew, caption);
                        };
                        newReader.onload = function (theFileNew) {
                            self._previewFile(i, file, theFileNew, previewData, fileInfo);
                            self._initFileActions();
                            processFileLoaded();
                        };
                        if (textFlag) {
                            newReader.readAsText(file, self.textEncoding);
                        } else {
                            newReader.readAsDataURL(file);
                        }
                    };
                    fileInfo = {'name': caption, 'type': file.type};
                    $.each(settings, function (k, f) {
                        if (k !== 'object' && k !== 'other' && typeof f === 'function' && f(file.type, caption)) {
                            knownTypes++;
                        }
                    });
                    if (knownTypes === 0) {// auto detect mime types from content if no known file types detected
                        uint = new Uint8Array(theFile.target.result);
                        for (j = 0; j < uint.length; j++) {
                            byte = uint[j].toString(16);
                            bytes.push(byte);
                        }
                        hex = bytes.join('').toLowerCase().substring(0, 8);
                        mime = $h.getMimeType(hex, '', '');
                        if ($h.isEmpty(mime)) { // look for ascii text content
                            contents = $h.arrayBuffer2String(reader.result);
                            mime = $h.isSvg(contents) ? 'image/svg+xml' : $h.getMimeType(hex, contents, file.type);
                        }
                        fileInfo = {'name': caption, 'type': mime};
                        isText = fnText(mime, '');
                        isHtml = fnHtml(mime, '');
                        isImage = fnImage(mime, '');
                        txtFlag = isText || isHtml;
                        if (txtFlag || isImage) {
                            readTextImage(txtFlag);
                            return;
                        }
                    }
                    self._previewFile(i, file, theFile, previewData, fileInfo);
                    self._initFileActions();
                    processFileLoaded();
                };
                reader.onprogress = function (data) {
                    if (data.lengthComputable) {
                        var fact = (data.loaded / data.total) * 100, progress = Math.ceil(fact);
                        msg = msgProgress.setTokens({
                            'index': i + 1,
                            'files': numFiles,
                            'percent': progress,
                            'name': caption
                        });
                        setTimeout(function () {
                            $status.html(msg);
                        }, self.processDelay);
                    }
                };

                if (isText || isHtml) {
                    reader.readAsText(file, self.textEncoding);
                } else {
                    if (isImage) {
                        reader.readAsDataURL(file);
                    } else {
                        reader.readAsArrayBuffer(file);
                    }
                }
                self.fileManager.add(file);
            };

            readFile(0);
            self._updateFileDetails(numFiles, false);
        },
        lock: function (selectMode) {
            var self = this, $container = self.$container;
            self._resetErrors();
            self.disable();
            $container.addClass('is-locked');
            if (!selectMode && self.showCancel) {
                $container.find('.fileinput-cancel').show();
            }
            if (!selectMode && self.showPause) {
                $container.find('.fileinput-pause').show();
            }
            self._raise('filelock', [self.fileManager.stack, self._getExtraData()]);
            return self.$element;
        },
        unlock: function (reset) {
            var self = this, $container = self.$container;
            if (reset === undefined) {
                reset = true;
            }
            self.enable();
            $container.removeClass('is-locked');
            if (self.showCancel) {
                $container.find('.fileinput-cancel').hide();
            }
            if (self.showPause) {
                $container.find('.fileinput-pause').hide();
            }
            if (reset) {
                self._resetFileStack();
            }
            self._raise('fileunlock', [self.fileManager.stack, self._getExtraData()]);
            return self.$element;
        },
        resume: function () {
            var self = this, flag = false, $pr = self.$progress, rm = self.resumableManager;
            if (!self.enableResumableUpload) {
                return self.$element;
            }
            if (self.paused) {
                $pr.html(self.progressPauseTemplate.setTokens({
                    percent: 101,
                    status: self.msgUploadResume,
                    stats: ''
                }));
            } else {
                flag = true;
            }
            self.paused = false;
            if (flag) {
                $pr.html(self.progressInfoTemplate.setTokens({
                    percent: 101,
                    status: self.msgUploadBegin,
                    stats: ''
                }));
            }
            setTimeout(function () {
                rm.upload();
            }, self.processDelay);
            return self.$element;
        },
        pause: function () {
            var self = this, rm = self.resumableManager, xhr = self.ajaxRequests, len = xhr.length, i,
                pct = rm.getProgress(), actions = self.fileActionSettings;
            if (!self.enableResumableUpload) {
                return self.$element;
            }
            if (rm.chunkIntervalId) {
                clearInterval(rm.chunkIntervalId);
            }
            if (self.ajaxQueueIntervalId) {
                clearInterval(self.ajaxQueueIntervalId);
            }
            self._raise('fileuploadpaused', [self.fileManager, rm]);
            if (len > 0) {
                for (i = 0; i < len; i += 1) {
                    self.paused = true;
                    xhr[i].abort();
                }
            }
            if (self.showPreview) {
                self._getThumbs().each(function () {
                    var $thumb = $(this), fileId = $thumb.attr('data-fileid'), t = self._getLayoutTemplate('stats'),
                        stats, $indicator = $thumb.find('.file-upload-indicator');
                    $thumb.removeClass('file-uploading');
                    if ($indicator.attr('title') === actions.indicatorLoadingTitle) {
                        self._setThumbStatus($thumb, 'Paused');
                        stats = t.setTokens({pendingTime: self.msgPaused, uploadSpeed: ''});
                        self.paused = true;
                        self._setProgress(pct, $thumb.find('.file-thumb-progress'), pct + '%', stats);
                    }
                    if (!self.fileManager.getFile(fileId)) {
                        $thumb.find('.kv-file-remove').removeClass('disabled').removeAttr('disabled');
                    }
                });
            }
            self._setProgress(101, self.$progress, self.msgPaused);
            return self.$element;
        },
        cancel: function () {
            var self = this, xhr = self.ajaxRequests, rm = self.resumableManager, len = xhr.length, i;
            if (self.enableResumableUpload && rm.chunkIntervalId) {
                clearInterval(rm.chunkIntervalId);
                rm.reset();
                self._raise('fileuploadcancelled', [self.fileManager, rm]);
            } else {
                self._raise('fileuploadcancelled', [self.fileManager]);
            }
            if (self.ajaxQueueIntervalId) {
                clearInterval(self.ajaxQueueIntervalId);
            }
            self._initAjax();
            if (len > 0) {
                for (i = 0; i < len; i += 1) {
                    self.cancelling = true;
                    xhr[i].abort();
                }
            }
            self._getThumbs().each(function () {
                var $thumb = $(this), fileId = $thumb.attr('data-fileid'), $prog = $thumb.find('.file-thumb-progress');
                $thumb.removeClass('file-uploading');
                self._setProgress(0, $prog);
                $prog.hide();
                if (!self.fileManager.getFile(fileId)) {
                    $thumb.find('.kv-file-upload').removeClass('disabled').removeAttr('disabled');
                    $thumb.find('.kv-file-remove').removeClass('disabled').removeAttr('disabled');
                }
                self.unlock();
            });
            setTimeout(function () {
                self._setProgressCancelled();
            }, self.processDelay);
            return self.$element;
        },
        clear: function () {
            var self = this, cap;
            if (!self._raise('fileclear')) {
                return;
            }
            self.$btnUpload.removeAttr('disabled');
            self._getThumbs().find('video,audio,img').each(function () {
                $h.cleanMemory($(this));
            });
            self._clearFileInput();
            self._resetUpload();
            self.clearFileStack();
            self._resetErrors(true);
            if (self._hasInitialPreview()) {
                self._showFileIcon();
                self._resetPreview();
                self._initPreviewActions();
                self.$container.removeClass('file-input-new');
            } else {
                self._getThumbs().each(function () {
                    self._clearObjects($(this));
                });
                if (self.isAjaxUpload) {
                    self.previewCache.data = {};
                }
                self.$preview.html('');
                cap = (!self.overwriteInitial && self.initialCaption.length > 0) ? self.initialCaption : '';
                self.$caption.attr('title', '').val(cap);
                $h.addCss(self.$container, 'file-input-new');
                self._validateDefaultPreview();
            }
            if (self.$container.find($h.FRAMES).length === 0) {
                if (!self._initCaption()) {
                    self.$captionContainer.removeClass('icon-visible');
                }
            }
            self._hideFileIcon();
            if (self.focusCaptionOnClear) {
                self.$captionContainer.focus();
            }
            self._setFileDropZoneTitle();
            self._raise('filecleared');
            return self.$element;
        },
        reset: function () {
            var self = this;
            if (!self._raise('filereset')) {
                return;
            }
            self.lastProgress = 0;
            self._resetPreview();
            self.$container.find('.fileinput-filename').text('');
            $h.addCss(self.$container, 'file-input-new');
            if (self.getFrames().length || self.dropZoneEnabled) {
                self.$container.removeClass('file-input-new');
            }
            self.clearFileStack();
            self._setFileDropZoneTitle();
            return self.$element;
        },
        disable: function () {
            var self = this;
            self.isDisabled = true;
            self._raise('filedisabled');
            self.$element.attr('disabled', 'disabled');
            self.$container.find('.kv-fileinput-caption').addClass('file-caption-disabled');
            self.$container.find('.fileinput-remove, .fileinput-upload, .file-preview-frame button')
                .attr('disabled', true);
            $h.addCss(self.$container.find('.btn-file'), 'disabled');
            self._initDragDrop();
            return self.$element;
        },
        enable: function () {
            var self = this;
            self.isDisabled = false;
            self._raise('fileenabled');
            self.$element.removeAttr('disabled');
            self.$container.find('.kv-fileinput-caption').removeClass('file-caption-disabled');
            self.$container.find('.fileinput-remove, .fileinput-upload, .file-preview-frame button')
                .removeAttr('disabled');
            self.$container.find('.btn-file').removeClass('disabled');
            self._initDragDrop();
            return self.$element;
        },
        upload: function () {
            var self = this, fm = self.fileManager, totLen = fm.count(), i, outData,
                hasExtraData = !$.isEmptyObject(self._getExtraData());
            if (!self.isAjaxUpload || self.isDisabled || !self._isFileSelectionValid(totLen)) {
                return;
            }
            self.lastProgress = 0;
            self._resetUpload();
            if (totLen === 0 && !hasExtraData) {
                self._showFileError(self.msgUploadEmpty);
                return;
            }
            self.cancelling = false;
            self.$progress.show();
            self.lock();
            if (totLen === 0 && hasExtraData) {
                self._setProgress(2);
                self._uploadExtraOnly();
                return;
            }
            if (self.enableResumableUpload) {
                return self.resume();
            }
            if (self.uploadAsync || self.enableResumableUpload) {
                outData = self._getOutData(null);
                self._raise('filebatchpreupload', [outData]);
                self.fileBatchCompleted = false;
                self.uploadCache = [];
                $.each(self.getFileStack(), function (id) {
                    var previewId = self._getThumbId(id);
                    self.uploadCache.push({id: previewId, content: null, config: null, tags: null, append: true});
                });
                self.$preview.find('.file-preview-initial').removeClass($h.SORT_CSS);
                self._initSortable();
            }
            self._setProgress(2);
            self.hasInitData = false;
            if (self.uploadAsync) {
                i = 0;
                $.each(fm.stack, function (id) {
                    self._uploadSingle(i, id, true);
                    i++;
                });
                return;
            }
            self._uploadBatch();
            return self.$element;
        },
        destroy: function () {
            var self = this, $form = self.$form, $cont = self.$container, $el = self.$element, ns = self.namespace;
            $(document).off(ns);
            $(window).off(ns);
            if ($form && $form.length) {
                $form.off(ns);
            }
            if (self.isAjaxUpload) {
                self._clearFileInput();
            }
            self._cleanup();
            self._initPreviewCache();
            $el.insertBefore($cont).off(ns).removeData();
            $cont.off().remove();
            return $el;
        },
        refresh: function (options) {
            var self = this, $el = self.$element;
            if (typeof options !== 'object' || $h.isEmpty(options)) {
                options = self.options;
            } else {
                options = $.extend(true, {}, self.options, options);
            }
            self._init(options, true);
            self._listen();
            return $el;
        },
        zoom: function (frameId) {
            var self = this, $frame = self._getFrame(frameId), $modal = self.$modal;
            if (!$frame) {
                return;
            }
            $h.initModal($modal);
            $modal.html(self._getModalContent());
            self._setZoomContent($frame);
            $modal.modal('show');
            self._initZoomButtons();
        },
        getExif: function (frameId) {
            var self = this, $frame = self._getFrame(frameId);
            return $frame && $frame.data('exif') || null;
        },
        getFrames: function (cssFilter) {
            var self = this, $frames;
            cssFilter = cssFilter || '';
            $frames = self.$preview.find($h.FRAMES + cssFilter);
            if (self.reversePreviewOrder) {
                $frames = $($frames.get().reverse());
            }
            return $frames;
        },
        getPreview: function () {
            var self = this;
            return {
                content: self.initialPreview,
                config: self.initialPreviewConfig,
                tags: self.initialPreviewThumbTags
            };
        }
    };

    $.fn.fileinput = function (option) {
        if (!$h.hasFileAPISupport() && !$h.isIE(9)) {
            return;
        }
        var args = Array.apply(null, arguments), retvals = [];
        args.shift();
        this.each(function () {
            var self = $(this), data = self.data('fileinput'), options = typeof option === 'object' && option,
                theme = options.theme || self.data('theme'), l = {}, t = {},
                lang = options.language || self.data('language') || $.fn.fileinput.defaults.language || 'en', opt;
            if (!data) {
                if (theme) {
                    t = $.fn.fileinputThemes[theme] || {};
                }
                if (lang !== 'en' && !$h.isEmpty($.fn.fileinputLocales[lang])) {
                    l = $.fn.fileinputLocales[lang] || {};
                }
                opt = $.extend(true, {}, $.fn.fileinput.defaults, t, $.fn.fileinputLocales.en, l, options, self.data());
                data = new FileInput(this, opt);
                self.data('fileinput', data);
            }

            if (typeof option === 'string') {
                retvals.push(data[option].apply(data, args));
            }
        });
        switch (retvals.length) {
            case 0:
                return this;
            case 1:
                return retvals[0];
            default:
                return retvals;
        }
    };

    //noinspection HtmlUnknownAttribute
    $.fn.fileinput.defaults = {
        language: 'en',
        showCaption: true,
        showBrowse: true,
        showPreview: true,
        showRemove: true,
        showUpload: true,
        showUploadStats: true,
        showCancel: null,
        showPause: null,
        showClose: true,
        showUploadedThumbs: true,
        showConsoleLogs: true,
        browseOnZoneClick: false,
        autoReplace: false,
        autoOrientImage: function () { // applicable for JPEG images only and non ios safari
            var ua = window.navigator.userAgent, webkit = !!ua.match(/WebKit/i),
                iOS = !!ua.match(/iP(od|ad|hone)/i), iOSSafari = iOS && webkit && !ua.match(/CriOS/i);
            return !iOSSafari;
        },
        autoOrientImageInitial: true,
        required: false,
        rtl: false,
        hideThumbnailContent: false,
        encodeUrl: true,
        focusCaptionOnBrowse: true,
        focusCaptionOnClear: true,
        generateFileId: null,
        previewClass: '',
        captionClass: '',
        frameClass: 'krajee-default',
        mainClass: 'file-caption-main',
        mainTemplate: null,
        purifyHtml: true,
        fileSizeGetter: null,
        initialCaption: '',
        initialPreview: [],
        initialPreviewDelimiter: '*$$*',
        initialPreviewAsData: false,
        initialPreviewFileType: 'image',
        initialPreviewConfig: [],
        initialPreviewThumbTags: [],
        previewThumbTags: {},
        initialPreviewShowDelete: true,
        initialPreviewDownloadUrl: '',
        removeFromPreviewOnError: false,
        deleteUrl: '',
        deleteExtraData: {},
        overwriteInitial: true,
        sanitizeZoomCache: function (content) {
            var $container = $(document.createElement('div')).append(content);
            $container.find('input,select,.file-thumbnail-footer').remove();
            return $container.html();
        },
        previewZoomButtonIcons: {
            prev: '<i class="glyphicon glyphicon-triangle-left"></i>',
            next: '<i class="glyphicon glyphicon-triangle-right"></i>',
            toggleheader: '<i class="glyphicon glyphicon-resize-vertical"></i>',
            fullscreen: '<i class="glyphicon glyphicon-fullscreen"></i>',
            borderless: '<i class="glyphicon glyphicon-resize-full"></i>',
            close: '<i class="glyphicon glyphicon-remove"></i>'
        },
        previewZoomButtonClasses: {
            prev: 'btn btn-navigate',
            next: 'btn btn-navigate',
            toggleheader: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
            fullscreen: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
            borderless: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
            close: 'btn btn-sm btn-kv btn-default btn-outline-secondary'
        },
        previewTemplates: {},
        previewContentTemplates: {},
        preferIconicPreview: false,
        preferIconicZoomPreview: false,
        allowedFileTypes: null,
        allowedFileExtensions: null,
        allowedPreviewTypes: undefined,
        allowedPreviewMimeTypes: null,
        allowedPreviewExtensions: null,
        disabledPreviewTypes: undefined,
        disabledPreviewExtensions: ['msi', 'exe', 'com', 'zip', 'rar', 'app', 'vb', 'scr'],
        disabledPreviewMimeTypes: null,
        defaultPreviewContent: null,
        customLayoutTags: {},
        customPreviewTags: {},
        previewFileIcon: '<i class="glyphicon glyphicon-file"></i>',
        previewFileIconClass: 'file-other-icon',
        previewFileIconSettings: {},
        previewFileExtSettings: {},
        buttonLabelClass: 'hidden-xs',
        browseIcon: '<i class="glyphicon glyphicon-folder-open"></i>&nbsp;',
        browseClass: 'btn btn-primary',
        removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
        removeClass: 'btn btn-default btn-secondary',
        cancelIcon: '<i class="glyphicon glyphicon-ban-circle"></i>',
        cancelClass: 'btn btn-default btn-secondary',
        pauseIcon: '<i class="glyphicon glyphicon-pause"></i>',
        pauseClass: 'btn btn-default btn-secondary',
        uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
        uploadClass: 'btn btn-default btn-secondary',
        uploadUrl: null,
        uploadUrlThumb: null,
        uploadAsync: true,
        uploadParamNames: {
            chunkCount: 'chunkCount',
            chunkIndex: 'chunkIndex',
            chunkSize: 'chunkSize',
            chunkSizeStart: 'chunkSizeStart',
            chunksUploaded: 'chunksUploaded',
            fileBlob: 'fileBlob',
            fileId: 'fileId',
            fileName: 'fileName',
            fileRelativePath: 'fileRelativePath',
            fileSize: 'fileSize',
            retryCount: 'retryCount'
        },
        maxAjaxThreads: 5,
        processDelay: 100,
        queueDelay: 10, // must be lesser than process delay
        progressDelay: 0, // must be lesser than process delay
        enableResumableUpload: false,
        resumableUploadOptions: {
            fallback: null,
            testUrl: null, // used for checking status of chunks/ files previously / partially uploaded
            chunkSize: 2 * 1024, // in KB
            maxThreads: 4,
            maxRetries: 3,
            showErrorLog: true
        },
        uploadExtraData: {},
        zoomModalHeight: 480,
        minImageWidth: null,
        minImageHeight: null,
        maxImageWidth: null,
        maxImageHeight: null,
        resizeImage: false,
        resizePreference: 'width',
        resizeQuality: 0.92,
        resizeDefaultImageType: 'image/jpeg',
        resizeIfSizeMoreThan: 0, // in KB
        minFileSize: 0,
        maxFileSize: 0,
        maxFilePreviewSize: 25600, // 25 MB
        minFileCount: 0,
        maxFileCount: 0,
        maxTotalFileCount: 0,
        validateInitialCount: false,
        msgValidationErrorClass: 'text-danger',
        msgValidationErrorIcon: '<i class="glyphicon glyphicon-exclamation-sign"></i> ',
        msgErrorClass: 'file-error-message',
        progressThumbClass: 'progress-bar progress-bar-striped active',
        progressClass: 'progress-bar bg-success progress-bar-success progress-bar-striped active',
        progressInfoClass: 'progress-bar bg-info progress-bar-info progress-bar-striped active',
        progressCompleteClass: 'progress-bar bg-success progress-bar-success',
        progressPauseClass: 'progress-bar bg-primary progress-bar-primary progress-bar-striped active',
        progressErrorClass: 'progress-bar bg-danger progress-bar-danger',
        progressUploadThreshold: 99,
        previewFileType: 'image',
        elCaptionContainer: null,
        elCaptionText: null,
        elPreviewContainer: null,
        elPreviewImage: null,
        elPreviewStatus: null,
        elErrorContainer: null,
        errorCloseButton: $h.closeButton('kv-error-close'),
        slugCallback: null,
        dropZoneEnabled: true,
        dropZoneTitleClass: 'file-drop-zone-title',
        fileActionSettings: {},
        otherActionButtons: '',
        textEncoding: 'UTF-8',
        ajaxSettings: {},
        ajaxDeleteSettings: {},
        showAjaxErrorDetails: true,
        mergeAjaxCallbacks: false,
        mergeAjaxDeleteCallbacks: false,
        retryErrorUploads: true,
        reversePreviewOrder: false,
        usePdfRenderer: function () {
            //noinspection JSUnresolvedVariable
            var isIE11 = !!window.MSInputMethodContext && !!document.documentMode;
            return !!navigator.userAgent.match(/(iPod|iPhone|iPad|Android)/i) || isIE11;
        },
        pdfRendererUrl: '',
        pdfRendererTemplate: '<iframe class="kv-preview-data file-preview-pdf" src="{renderer}?file={data}" {style}></iframe>'
    };

    // noinspection HtmlUnknownAttribute
    $.fn.fileinputLocales.en = {
        fileSingle: 'file',
        filePlural: 'files',
        browseLabel: 'Browse &hellip;',
        removeLabel: 'Remove',
        removeTitle: 'Clear all unprocessed files',
        cancelLabel: 'Cancel',
        cancelTitle: 'Abort ongoing upload',
        pauseLabel: 'Pause',
        pauseTitle: 'Pause ongoing upload',
        uploadLabel: 'Upload',
        uploadTitle: 'Upload selected files',
        msgNo: 'No',
        msgNoFilesSelected: 'No files selected',
        msgCancelled: 'Cancelled',
        msgPaused: 'Paused',
        msgPlaceholder: 'Select {files}...',
        msgZoomModalHeading: 'Detailed Preview',
        msgFileRequired: 'You must select a file to upload.',
        msgSizeTooSmall: 'File "{name}" (<b>{size} KB</b>) is too small and must be larger than <b>{minSize} KB</b>.',
        msgSizeTooLarge: 'File "{name}" (<b>{size} KB</b>) exceeds maximum allowed upload size of <b>{maxSize} KB</b>.',
        msgFilesTooLess: 'You must select at least <b>{n}</b> {files} to upload.',
        msgFilesTooMany: 'Number of files selected for upload <b>({n})</b> exceeds maximum allowed limit of <b>{m}</b>.',
        msgTotalFilesTooMany: 'You can upload a maximum of <b>{m}</b> files (<b>{n}</b> files detected).',
        msgFileNotFound: 'File "{name}" not found!',
        msgFileSecured: 'Security restrictions prevent reading the file "{name}".',
        msgFileNotReadable: 'File "{name}" is not readable.',
        msgFilePreviewAborted: 'File preview aborted for "{name}".',
        msgFilePreviewError: 'An error occurred while reading the file "{name}".',
        msgInvalidFileName: 'Invalid or unsupported characters in file name "{name}".',
        msgInvalidFileType: 'Invalid type for file "{name}". Only "{types}" files are supported.',
        msgInvalidFileExtension: 'Invalid extension for file "{name}". Only "{extensions}" files are supported.',
        msgFileTypes: {
            'image': 'image',
            'html': 'HTML',
            'text': 'text',
            'video': 'video',
            'audio': 'audio',
            'flash': 'flash',
            'pdf': 'PDF',
            'object': 'object'
        },
        msgUploadAborted: 'The file upload was aborted',
        msgUploadThreshold: 'Processing...',
        msgUploadBegin: 'Initializing...',
        msgUploadEnd: 'Done',
        msgUploadResume: 'Resuming upload...',
        msgUploadEmpty: 'No valid data available for upload.',
        msgUploadError: 'Upload Error',
        msgDeleteError: 'Delete Error',
        msgProgressError: 'Error',
        msgValidationError: 'Validation Error',
        msgLoading: 'Loading file {index} of {files} &hellip;',
        msgProgress: 'Loading file {index} of {files} - {name} - {percent}% completed.',
        msgSelected: '{n} {files} selected',
        msgFoldersNotAllowed: 'Drag & drop files only! {n} folder(s) dropped were skipped.',
        msgImageWidthSmall: 'Width of image file "{name}" must be at least {size} px.',
        msgImageHeightSmall: 'Height of image file "{name}" must be at least {size} px.',
        msgImageWidthLarge: 'Width of image file "{name}" cannot exceed {size} px.',
        msgImageHeightLarge: 'Height of image file "{name}" cannot exceed {size} px.',
        msgImageResizeError: 'Could not get the image dimensions to resize.',
        msgImageResizeException: 'Error while resizing the image.<pre>{errors}</pre>',
        msgAjaxError: 'Something went wrong with the {operation} operation. Please try again later!',
        msgAjaxProgressError: '{operation} failed',
        msgDuplicateFile: 'File "{name}" of same size "{size} KB" has already been selected earlier. Skipping duplicate selection.',
        msgResumableUploadRetriesExceeded: 'Upload aborted beyond <b>{max}</b> retries for file <b>{file}</b>! Error Details: <pre>{error}</pre>',
        msgPendingTime: '{time} remaining',
        msgCalculatingTime: 'calculating time remaining',
        ajaxOperations: {
            deleteThumb: 'file delete',
            uploadThumb: 'file upload',
            uploadBatch: 'batch file upload',
            uploadExtra: 'form data upload'
        },
        dropZoneTitle: 'Drag & drop files here &hellip;',
        dropZoneClickTitle: '<br>(or click to select {files})',
        previewZoomButtonTitles: {
            prev: 'View previous file',
            next: 'View next file',
            toggleheader: 'Toggle header',
            fullscreen: 'Toggle full screen',
            borderless: 'Toggle borderless mode',
            close: 'Close detailed preview'
        }
    };

    $.fn.fileinput.Constructor = FileInput;

    /**
     * Convert automatically file inputs with class 'file' into a bootstrap fileinput control.
     */
    $(document).ready(function () {
        var $input = $('input.file[type=file]');
        if ($input.length) {
            $input.fileinput();
        }
    });
}));