fileinput.js

/*!
 * bootstrap-fileinput v5.5.5
 * http://plugins.krajee.com/file-input
 *
 * Author: Kartik Visweswaran
 * Copyright: 2014 - 2024, 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";
  if (typeof define === "function" && define.amd) {
    define(["jquery"], factory);
  } else if (typeof module === "object" && typeof module.exports === "object") {
    factory(require("jquery"));
  } else {
    factory(window.jQuery);
  }
})(function ($) {
  "use strict";

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

  if (!$.fn.fileinputBsVersion) {
    $.fn.fileinputBsVersion =
      (window.bootstrap && window.bootstrap.Alert && window.bootstrap.Alert.VERSION) ||
      (window.Alert && window.Alert.VERSION) ||
      "3.x.x";
  }

  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;
  };

  if (!Array.prototype.flatMap) {
    // polyfill flatMap
    Array.prototype.flatMap = function (lambda) {
      return [].concat(this.map(lambda));
    };
  }

  var $h, FileInput;

  // fileinput helper object for all global variables and internal helper methods
  $h = {
    FRAMES: ".kv-preview-thumb",
    SORT_CSS: "file-sortable",
    INIT_FLAG: "init-",
    SCRIPT_SRC: (document && document.currentScript && document.currentScript.src) || null,
    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}.",
      chunkQueueError: "Could not push task to ajax pool for chunk index # {index}.",
      resumableMaxRetriesReached: "Maximum resumable ajax retries ({n}) reached.",
      resumableRetryError: "Could not retry the resumable request (try # {n})... aborting.",
      resumableAborting: "Aborting / cancelling the resumable request.",
      resumableRequestError: "Error processing resumable request. {msg}",
    },
    objUrl: window.URL || window.webkitURL,
    getZoomPlaceholder: function () {
      // used to prevent 404 errors in URL parsing
      var src = $h.SCRIPT_SRC,
        srcPath,
        zoomVar = "?kvTemp__2873389129__=";
      if (!src) {
        return zoomVar;
      }
      srcPath = src.substring(0, src.lastIndexOf("/"));
      return srcPath.substring(0, srcPath.lastIndexOf("/") + 1) + "img/loading.gif" + zoomVar;
    },
    defaultButtonCss: function (fill) {
      return "btn-default btn-" + (fill ? "" : "outline-") + "secondary";
    },
    isBs: function (ver) {
      var chk = $h.trim(($.fn.fileinputBsVersion || "") + "");
      ver = parseInt(ver, 10);
      if (!chk) {
        return ver === 4;
      }
      return ver === parseInt(chk.charAt(0), 10);
    },
    isNumeric: function (n) {
      if (n === undefined) {
        return false;
      }
      return !isNaN(parseFloat(n)) && isFinite(n);
    },
    trim: function (val) {
      if (val === undefined) {
        return "";
      }
      return val.toString().trim();
    },
    now: function () {
      return new Date().getTime();
    },
    round: function (num) {
      num = parseFloat(num);
      return isNaN(num) ? 0 : Math.floor(Math.round(num));
    },
    getArray: function (obj) {
      var i,
        arr = [],
        len = (obj && obj.length) || 0;
      for (i = 0; i < len; i++) {
        arr.push(obj[i]);
      }
      return arr;
    },
    getFileRelativePath: function (file) {
      /** @namespace file.relativePath */
      /** @namespace file.webkitRelativePath */
      return String(file.newPath || 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 + "_" + encodeURIComponent(relativePath).replace(/%/g, "_");
    },
    getFrameSelector: function (id, selector) {
      selector = selector || "";
      return '[id="' + id + '"]' + selector;
    },
    getZoomSelector: function (id, selector) {
      return $h.getFrameSelector("zoom-" + id, selector);
    },
    getFrameElement: function ($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,
        };
      $h.getObjectKeys(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) {
        $h.objUrl.revokeObjectURL(data);
      }
    },
    compare: function (input, str, exact) {
      return input !== undefined && (exact ? input === str : input.match(str));
    },
    isIE: function (ver) {
      var div, status;
      // check for IE versions < 11
      if (navigator.appName !== "Microsoft Internet Explorer") {
        return false;
      }
      if (ver === 10) {
        return new RegExp("msie\\s" + ver, "i").test(navigator.userAgent);
      }
      div = document.createElement("div");
      div.innerHTML = "<!--[if IE " + ver + "]> <i></i> <![endif]-->";
      status = div.getElementsByTagName("i").length;
      document.body.appendChild(div);
      div.parentNode.removeChild(div);
      return status;
    },
    canOrientImage: function ($el) {
      var $img = $(document.createElement("img")).css({ width: "1px", height: "1px" }).insertAfter($el),
        flag = $img.css("image-orientation");
      $img.remove();
      return !!flag;
    },
    canAssignFilesToInput: function () {
      var input = document.createElement("input");
      try {
        input.type = "file";
        input.files = null;
        return true;
      } catch (err) {
        return false;
      }
    },
    getDragDropFolders: function (items) {
      var i,
        item,
        len = items ? items.length : 0,
        folders = 0;
      if (len > 0 && items[0].webkitGetAsEntry()) {
        for (i = 0; i < len; i++) {
          item = items[i].webkitGetAsEntry();
          if (item && item.isDirectory) {
            folders++;
          }
        }
      }
      return folders;
    },
    initModal: function ($modal) {
      var $body = $("body");
      if ($body.length) {
        $modal.appendTo($body);
      }
    },
    isFunction: function (v) {
      return typeof v === "function";
    },
    isEmpty: function (value, trim) {
      if (value === undefined || value === null || value === "") {
        return true;
      }
      if ($h.isString(value) && trim) {
        return $h.trim(value) === "";
      }
      if ($h.isArray(value)) {
        return value.length === 0;
      }
      if ($.isPlainObject(value) && $.isEmptyObject(value)) {
        return true;
      }
      return false;
    },
    isArray: function (a) {
      return Array.isArray(a) || Object.prototype.toString.call(a) === "[object Array]";
    },
    isString: function (a) {
      return Object.prototype.toString.call(a) === "[object String]";
    },
    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) {
      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) {
      if (window.TextDecoder) {
        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;
    },
    isSvg: function (str) {
      if ($h.isEmpty(str)) {
        return false;
      }
      str = $h.trim(str).replace(/\n/g, " ");
      if (str.length === 0) {
        return false;
      }
      return str.match(/^\s*<\?xml/i) && (str.match(/<!DOCTYPE svg/i) || str.match(/<svg/i));
    },
    getMimeType: function (sign, contents, type) {
      var signature = sign || "";
      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 "41433130":
          return "image/vnd.dwg";
        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]);
    },
    createDiv: function () {
      return $(document.createElement("div"));
    },
    createElement: function (str, tag) {
      tag = tag || "div";
      return $($.parseHTML("<" + tag + ">" + str + "</" + tag + ">"));
    },
    uniqId: function () {
      return (new Date().getTime() + Math.floor(Math.random() * Math.pow(10, 15))).toString(36);
    },
    cspBuffer: {
      CSP_ATTRIB: "data-csp-01928735", // a randomly named temporary attribute to store the CSP elem id
      domElementsStyles: {},
      stash: function (htmlString) {
        var self = this,
          outerDom = $.parseHTML("<div>" + htmlString + "</div>"),
          $el = $(outerDom);
        $el.find("[style]").each(function (key, elem) {
          var $elem = $(elem),
            styleDeclaration = $elem[0].style,
            id = $h.uniqId(),
            styles = {};
          if (styleDeclaration && styleDeclaration.length) {
            $(styleDeclaration).each(function () {
              styles[this] = styleDeclaration[this];
            });
            self.domElementsStyles[id] = styles;
            $elem.removeAttr("style").attr(self.CSP_ATTRIB, id);
          }
        });
        $el.filter("*").removeAttr("style"); // make sure all style attr are removed
        var values = Object.values
          ? Object.values(outerDom)
          : Object.keys(outerDom).map(function (itm) {
              return outerDom[itm];
            });
        return values
          .flatMap(function (elem) {
            return elem.innerHTML;
          })
          .join("");
      },
      apply: function (domElement) {
        var self = this,
          $el = $(domElement);
        $el.find("[" + self.CSP_ATTRIB + "]").each(function (key, elem) {
          var $elem = $(elem),
            id = $elem.attr(self.CSP_ATTRIB),
            styles = self.domElementsStyles[id];
          if (styles) {
            $elem.css(styles);
          }
          $elem.removeAttr(self.CSP_ATTRIB);
        });
        self.domElementsStyles = {};
      },
    },
    setHtml: function ($elem, htmlString) {
      var buf = $h.cspBuffer;
      $elem.html(buf.stash(htmlString));
      buf.apply($elem);
      return $elem;
    },
    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 () {
      return (
        document.fullscreenElement ||
        document.mozFullScreenElement ||
        document.webkitFullscreenElement ||
        document.msFullscreenElement
      );
    },
    toggleFullScreen: function (maximize) {
      var doc = document,
        de = doc.documentElement,
        isFullScreen = $h.checkFullScreen();
      if (de && maximize && !isFullScreen) {
        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 {
        if (isFullScreen) {
          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 = $.extend(true, [], arr);
      if (reverseOrder) {
        newArr.reverse();
      }
      if (newIndex >= newArr.length) {
        var k = newIndex - newArr.length;
        while (k-- + 1) {
          newArr.push(undefined);
        }
      }
      newArr.splice(newIndex, 0, newArr.splice(oldIndex, 1)[0]);
      if (reverseOrder) {
        newArr.reverse();
      }
      return newArr;
    },
    closeButton: function (css) {
      css = ($h.isBs(5) ? "btn-close" : "close") + (css ? " " + css : "");
      return (
        '<button type="button" class="' +
        css +
        '" aria-label="Close">\n' +
        ($h.isBs(5) ? "" : '  <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;
    },
    getObjectKeys: function (obj) {
      var keys = [];
      if (obj) {
        $.each(obj, function (key) {
          keys.push(key);
        });
      }
      return keys;
    },
    getObjectSize: function (obj) {
      return $h.getObjectKeys(obj).length;
    },
    /**
     * Small dependency injection for the task manager
     * https://gist.github.com/fearphage/4341799
     */
    whenAll: function (array) {
      var s = [].slice,
        resolveValues = arguments.length === 1 && $h.isArray(array) ? array : s.call(arguments),
        deferred = $.Deferred(),
        i,
        failed = 0,
        value,
        length = resolveValues.length,
        remaining = length,
        rejectContexts,
        rejectValues,
        resolveContexts,
        updateFunc;
      rejectContexts = rejectValues = resolveContexts = Array(length);
      updateFunc = function (index, contexts, values) {
        return function () {
          if (values !== resolveValues) {
            failed++;
          }
          deferred.notifyWith((contexts[index] = this), (values[index] = s.call(arguments)));
          if (!--remaining) {
            deferred[(!failed ? "resolve" : "reject") + "With"](contexts, values);
          }
        };
      };
      for (i = 0; i < length; i++) {
        if ((value = resolveValues[i]) && $h.isFunction(value.promise)) {
          value
            .promise()
            .done(updateFunc(i, resolveContexts, resolveValues))
            .fail(updateFunc(i, rejectContexts, rejectValues));
        } else {
          deferred.notifyWith(this, value);
          --remaining;
        }
      }
      if (!remaining) {
        deferred.resolveWith(resolveContexts, resolveValues);
      }
      return deferred.promise();
    },
  };
  FileInput = function (element, options) {
    var self = this;
    self.$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");
  };

  FileInput.prototype = {
    constructor: FileInput,
    _cleanup: function () {
      var self = this;
      self.reader = null;
      self.clearFileStack();
      self.fileBatchCompleted = true;
      self.isError = false;
      self.isDuplicateError = false;
      self.isPersistentError = false;
      self.cancelling = false;
      self.paused = false;
      self.lastProgress = 0;
      self._initAjax();
    },
    _isAborted: function () {
      var self = this;
      return self.cancelling || self.paused;
    },
    _initAjax: function () {
      var self = this,
        tm = (self.taskManager = {
          pool: {},
          addPool: function (id) {
            return (tm.pool[id] = new tm.TasksPool(id));
          },
          getPool: function (id) {
            return tm.pool[id];
          },
          addTask: function (id, logic) {
            // add standalone task directly from task manager
            return new tm.Task(id, logic);
          },
          TasksPool: function (id) {
            var tp = this;
            tp.id = id;
            tp.cancelled = false;
            tp.cancelledDeferrer = $.Deferred();
            tp.tasks = {};
            tp.addTask = function (id, logic) {
              return (tp.tasks[id] = new tm.Task(id, logic));
            };
            tp.size = function () {
              return $h.getObjectSize(tp.tasks);
            };
            tp.run = function (maxThreads) {
              var i = 0,
                failed = false,
                task,
                tasksList = $h.getObjectKeys(tp.tasks).map(function (key) {
                  return tp.tasks[key];
                }),
                tasksDone = [],
                deferred = $.Deferred(),
                enqueue,
                callback;

              if (tp.cancelled) {
                tp.cancelledDeferrer.resolve();
                return deferred.reject();
              }
              // if run all at once
              if (!maxThreads) {
                var tasksDeferredList = $h.getObjectKeys(tp.tasks).map(function (key) {
                  return tp.tasks[key].deferred;
                });
                // when all are done
                $h.whenAll(tasksDeferredList)
                  .done(function () {
                    var argv = $h.getArray(arguments);
                    if (!tp.cancelled) {
                      deferred.resolve.apply(null, argv);
                      tp.cancelledDeferrer.reject();
                    } else {
                      deferred.reject.apply(null, argv);
                      tp.cancelledDeferrer.resolve();
                    }
                  })
                  .fail(function () {
                    var argv = $h.getArray(arguments);
                    deferred.reject.apply(null, argv);
                    if (!tp.cancelled) {
                      tp.cancelledDeferrer.reject();
                    } else {
                      tp.cancelledDeferrer.resolve();
                    }
                  });
                // run all tasks
                $.each(tp.tasks, function (id) {
                  task = tp.tasks[id];
                  task.run();
                });
                return deferred;
              }
              enqueue = function (task) {
                $.when(task.deferred)
                  .fail(function () {
                    failed = true;
                    callback.apply(null, arguments);
                  })
                  .always(callback);
              };
              callback = function () {
                var argv = $h.getArray(arguments);
                // notify a task just ended
                deferred.notify(argv);
                tasksDone.push(argv);
                if (tp.cancelled) {
                  deferred.reject.apply(null, tasksDone);
                  tp.cancelledDeferrer.resolve();
                  return;
                }
                if (tasksDone.length === tp.size()) {
                  if (failed) {
                    deferred.reject.apply(null, tasksDone);
                  } else {
                    deferred.resolve.apply(null, tasksDone);
                  }
                }
                // if there are any tasks remaining
                if (tasksList.length) {
                  task = tasksList.shift();
                  enqueue(task);
                  task.run();
                }
              };
              // run the first "maxThreads" tasks
              while (tasksList.length && i++ < maxThreads) {
                task = tasksList.shift();
                enqueue(task);
                task.run();
              }
              return deferred;
            };
            tp.cancel = function () {
              tp.cancelled = true;
              return tp.cancelledDeferrer;
            };
          },
          Task: function (id, logic) {
            var tk = this;
            tk.id = id;
            tk.deferred = $.Deferred();
            tk.logic = logic;
            tk.context = null;
            tk.run = function () {
              var argv = $h.getArray(arguments);
              argv.unshift(tk.deferred); // add deferrer as first argument
              logic.apply(tk.context, argv); // run task
              return tk.deferred; // return deferrer
            };
            tk.runWithContext = function (context) {
              tk.context = context;
              return tk.run();
            };
          },
        });
      self.ajaxQueue = [];
      self.ajaxRequests = [];
      self.ajaxPool = null;
      self.ajaxAborted = false;
    },
    _init: function (options, refreshMode) {
      var self = this,
        f,
        $el = self.$element,
        $cont,
        t,
        tmp;
      self.options = options;
      self.zoomPlaceholder = $h.getZoomPlaceholder();
      self.canOrientImage = $h.canOrientImage($el);
      $.each(options, function (key, value) {
        switch (key) {
          case "minFileCount":
          case "maxFileCount":
          case "maxTotalFileCount":
          case "minFileSize":
          case "maxFileSize":
          case "maxMultipleFileSize":
          case "maxFilePreviewSize":
          case "resizeQuality":
          case "resizeIfSizeMoreThan":
          case "progressUploadThreshold":
          case "initialPreviewCount":
          case "zoomModalHeight":
          case "minImageHeight":
          case "maxImageHeight":
          case "minImageWidth":
          case "maxImageWidth":
          case "bytesToKB":
            self[key] = $h.getNum(value);
            break;
          default:
            self[key] = value;
            break;
        }
      });
      if (!self.bytesToKB || self.bytesToKB <= 0) {
        self.bytesToKB = 1024;
      }
      if (self.errorCloseButton === undefined) {
        self.errorCloseButton = $h.closeButton("kv-error-close" + ($h.isBs(5) ? "  float-end" : ""));
      }
      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._resetErrors();
        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.uploadStartTime = $h.now();
      self.fileManager = {
        stack: {},
        filesProcessed: [],
        errors: [],
        loadedImages: {},
        totalImages: 0,
        totalFiles: null,
        totalSize: null,
        uploadedSize: 0,
        stats: {},
        bpsLog: [],
        bps: 0,
        initStats: function (id) {
          var data = { started: $h.now() };
          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) || $h.now() : self.uploadStartTime,
            elapsed = ($h.now() - started) / 1000,
            bps = Math.ceil(elapsed ? loaded / elapsed : 0),
            pendingBytes = total - loaded,
            out,
            delay = fm.bpsLog.length ? self.bitrateUpdateDelay : 0;
          setTimeout(function () {
            var i,
              j = 0,
              n = 0,
              len,
              beg;
            fm.bpsLog.push(bps);
            fm.bpsLog.sort(function (a, b) {
              return a - b;
            });
            len = fm.bpsLog.length;
            beg = len > 10 ? len - 10 : Math.ceil(len / 2);
            for (i = len; i > beg; i--) {
              n = parseFloat(fm.bpsLog[i]);
              j++;
            }
            fm.bps = (j > 0 ? n / j : 0) * 64;
          }, delay);
          out = {
            fileId: id,
            started: started,
            elapsed: elapsed,
            loaded: loaded,
            total: total,
            bps: fm.bps,
            bitrate: self._getSize(fm.bps, false, self.bitRateUnits),
            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.getFileStack(), 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 = self._getThumbFileId($thumb);
          self.fileManager.removeFile(id);
        },
        removeFile: function (id) {
          var fm = self.fileManager;
          if (!id) {
            return;
          }
          delete fm.stack[id];
          delete fm.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.getFileStack(), function (k, v) {
            if (v && v.file) {
              files.push(v.file);
            }
          });
          return files;
        },
        isPending: function (id) {
          return $.inArray(id, self.fileManager.filesProcessed) === -1 && self.fileManager.exists(id);
        },
        isProcessed: function () {
          var filesProcessed = true,
            fm = self.fileManager;
          $.each(self.getFileStack(), function (id) {
            if (fm.isPending(id)) {
              filesProcessed = false;
            }
          });
          return filesProcessed;
        },
        clear: function () {
          var fm = self.fileManager;
          self.isDuplicateError = false;
          self.isPersistentError = false;
          fm.totalFiles = null;
          fm.totalSize = null;
          fm.uploadedSize = 0;
          fm.stack = {};
          fm.errors = [];
          fm.filesProcessed = [];
          fm.stats = {};
          fm.bpsLog = [];
          fm.bps = 0;
          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 $h.getObjectKeys(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 = $(this);
            if (self._getThumbFileId($t) === id) {
              $thumb = $t;
            }
          });
          return $thumb;
        },
        getThumbIndex: function ($thumb) {
          var id = self._getThumbFileId($thumb);
          return self.fileManager.getIndex(id);
        },
        getIdList: function () {
          return $h.getObjectKeys(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.filesProcessed.push(id);
        },
        getProgress: function () {
          var total = self.fileManager.total(),
            filesProcessed = self.fileManager.filesProcessed.length;
          if (!total) {
            return 0;
          }
          return Math.ceil((filesProcessed / 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 = $h.logMessages,
        rm,
        fm = self.fileManager;
      if (!self.enableResumableUpload) {
        return;
      }
      if (opts.fallback !== false && typeof opts.fallback !== "function") {
        opts.fallback = function (s) {
          s._log(logs.noResumableSupport);
          s.enableResumableUpload = false;
        };
      }
      if (!$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;
      }
      rm = self.resumableManager = {
        init: function (id, f, index) {
          rm.logs = [];
          rm.stack = [];
          rm.error = "";
          rm.id = id;
          rm.file = f.file;
          rm.fileName = f.name;
          rm.fileIndex = index;
          rm.completed = 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 = opts.chunkSize * self.bytesToKB;
          rm.chunkCount = rm.getTotalChunks();
        },
        setAjaxError: function (jqXHR, textStatus, errorThrown, isTest) {
          if (jqXHR.responseJSON && jqXHR.responseJSON.error) {
            errorThrown = jqXHR.responseJSON.error.toString();
          }
          if (!isTest) {
            rm.error = errorThrown;
          }
          if (opts.showErrorLog) {
            self._log(logs.ajaxError, {
              status: jqXHR.status,
              error: errorThrown,
              text: jqXHR.responseText || "",
            });
          }
        },
        reset: function () {
          rm.stack = [];
          rm.chunksProcessed = {};
        },
        setProcessed: function (status) {
          var 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 },
            tokens,
            skipErrorsAndProceed = self.resumableUploadOptions.skipErrorsAndProceed;
          rm.completed = true;
          rm.lastProgress = 0;
          if (hasThumb) {
            $thumb.removeClass("file-uploading");
          }
          if (status === "success") {
            fm.uploadedSize += rm.file.size;
            if (self.showPreview) {
              self._setProgress(101, $prog);
              self._setThumbStatus($thumb, "Success");
              self._initUploadSuccess(rm.chunksProcessed[id].data, $thumb);
            }
            fm.removeFile(id);
            delete rm.chunksProcessed[id];
            self._raise("fileuploaded", [params.id, params.index, params.fileId]);
            if (fm.isProcessed()) {
              self._setProgress(101);
            }
          } else {
            if (status !== "cancel") {
              if (self.showPreview) {
                self._setThumbStatus($thumb, "Error");
                self._setPreviewError($thumb, true);
                self._setProgress(101, $prog, self.msgProgressError);
                self._setProgress(101, self.$progress, self.msgProgressError);
                self.cancelling = !skipErrorsAndProceed;
              }
              if (!self.$errorContainer.find('li[data-file-id="' + params.fileId + '"]').length) {
                tokens = { file: rm.fileName, max: opts.maxRetries, error: rm.error };
                msg = self.msgResumableUploadRetriesExceeded.setTokens(tokens);
                $.extend(params, tokens);
                self._showFileError(msg, params, "filemaxretries");
                if (skipErrorsAndProceed) {
                  fm.removeFile(id);
                  delete rm.chunksProcessed[id];
                  if (fm.isProcessed()) {
                    self._setProgress(101);
                  }
                }
              }
            }
          }
          if (fm.isProcessed()) {
            rm.reset();
          }
        },
        check: function () {
          var status = true;
          $.each(rm.logs, function (index, value) {
            if (!value) {
              status = false;
              return false;
            }
          });
        },
        processedResumables: function () {
          var logs = rm.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 size = rm.processedResumables() * rm.chunkSize;
          return size > rm.file.size ? rm.file.size : size;
        },
        getTotalChunks: function () {
          var chunkSize = parseFloat(rm.chunkSize);
          if (!isNaN(chunkSize) && chunkSize > 0) {
            return Math.ceil(rm.file.size / chunkSize);
          }
          return 0;
        },
        getProgress: function () {
          var chunksProcessed = rm.processedResumables(),
            total = rm.chunkCount;
          if (total === 0) {
            return 0;
          }
          return Math.ceil((chunksProcessed / total) * 100);
        },
        checkAborted: function (intervalId) {
          if (self._isAborted()) {
            clearInterval(intervalId);
            self.unlock();
          }
        },
        upload: function () {
          var 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.processUpload();
              }
            }
            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,
            pool,
            tm = self.taskManager,
            total = rm.chunkCount;
          pool = tm.addPool(rm.id);
          for (i = 0; i < total; i++) {
            rm.logs[i] = !!(rm.chunksProcessed[rm.id] && rm.chunksProcessed[rm.id][i]);
            if (!rm.logs[i]) {
              rm.pushAjax(i, 0);
            }
          }
          pool
            .run(opts.maxThreads)
            .done(function () {
              rm.setProcessed("success");
            })
            .fail(function () {
              rm.setProcessed(pool.cancelled ? "cancel" : "error");
            });
        },
        processUpload: function () {
          var fd,
            f,
            id = rm.id,
            fnBefore,
            fnSuccess,
            fnError,
            fnComplete,
            outData;
          if (!opts.testUrl) {
            rm.uploadResumable();
            return;
          }
          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.chunksProcessed[id]) {
                rm.chunksProcessed[id] = {};
              }
              $.each(data[chunksUploaded], function (key, index) {
                rm.logs[index] = true;
                rm.chunksProcessed[id][index] = true;
              });
              rm.chunksProcessed[id].data = data;
              self._raise("filetestsuccess", params);
            }
            rm.uploadResumable();
          };
          fnError = function (jqXHR, textStatus, errorThrown) {
            outData = self._getOutData(fd, jqXHR);
            self._raise("filetestajaxerror", [id, fm, rm, outData]);
            rm.setAjaxError(jqXHR, textStatus, errorThrown, true);
            rm.uploadResumable();
          };
          fnComplete = function () {
            self._raise("filetestcomplete", [id, fm, rm, self._getOutData(fd)]);
          };
          self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex, opts.testUrl);
        },
        pushAjax: function (index, retry) {
          var tm = self.taskManager,
            pool = tm.getPool(rm.id);
          pool.addTask(pool.size() + 1, function (deferrer) {
            // use fifo chunk stack
            var arr = rm.stack.shift(),
              index;
            index = arr[0];
            if (!rm.chunksProcessed[rm.id] || !rm.chunksProcessed[rm.id][index]) {
              rm.sendAjax(index, arr[1], deferrer);
            } else {
              self._log(logs.chunkQueueError, { index: index });
            }
          });
          rm.stack.push([index, retry]);
        },
        sendAjax: function (index, retry, deferrer) {
          var f,
            chunkSize = rm.chunkSize,
            id = rm.id,
            file = rm.file,
            $thumb = rm.$thumb,
            msgs = $h.logMessages,
            $btnDelete = rm.$btnDelete,
            logError = function (msg, tokens) {
              if (tokens) {
                msg = msg.setTokens(tokens);
              }
              msg = msgs.resumableRequestError.setTokens({ msg: msg });
              self._log(msg);
              deferrer.reject(msg);
            };
          if (rm.chunksProcessed[id] && rm.chunksProcessed[id][index]) {
            return;
          }
          if (retry > opts.maxRetries) {
            logError(msgs.resumableMaxRetriesReached, { n: 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) {
            if (self._isAborted()) {
              logError(msgs.resumableAborting);
              return;
            }
            outData = self._getOutData(fd, jqXHR, data);
            var paramNames = self.uploadParamNames,
              chunkIndex = paramNames.chunkIndex || "chunkIndex",
              params = [id, index, retry, fm, rm, outData];
            if (data.error) {
              if (opts.showErrorLog) {
                self._log(logs.retryStatus, {
                  retry: retry + 1,
                  filename: rm.fileName,
                  chunk: index,
                });
              }
              self._raise("filechunkerror", params);
              rm.pushAjax(index, retry + 1);
              rm.error = data.error;
              logError(data.error);
            } else {
              rm.logs[data[chunkIndex]] = true;
              if (!rm.chunksProcessed[id]) {
                rm.chunksProcessed[id] = {};
              }
              rm.chunksProcessed[id][data[chunkIndex]] = true;
              rm.chunksProcessed[id].data = data;
              deferrer.resolve.call(null, data);
              self._raise("filechunksuccess", params);
              rm.check();
            }
          };
          fnError = function (jqXHR, textStatus, errorThrown) {
            if (self._isAborted()) {
              logError(msgs.resumableAborting);
              return;
            }
            outData = self._getOutData(fd, jqXHR);
            rm.setAjaxError(jqXHR, textStatus, errorThrown);
            self._raise("filechunkajaxerror", [id, index, retry, fm, rm, outData]);
            rm.pushAjax(index, retry + 1); // push another task
            logError(msgs.resumableRetryError, { n: retry - 1 }); // resolve the current task
          };
          fnComplete = function () {
            if (!self._isAborted()) {
              self._raise("filechunkcomplete", [id, index, retry, fm, rm, self._getOutData(fd)]);
            }
          };
          self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex);
        },
      };
      rm.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,
        tActionRotate,
        tStats,
        tModalLabel,
        tDescClose,
        renderObject = function (type, mime) {
          return (
            '<object class="kv-preview-data file-preview-' +
            type +
            '" title="{caption}" ' +
            'data="{data}" type="' +
            mime +
            '"' +
            tStyle +
            ">\n" +
            $h.DEFAULT_PREVIEW +
            "\n</object>\n"
          );
        },
        defBtnCss1 = "btn btn-sm btn-kv " + $h.defaultButtonCss();
      tMain1 =
        "{preview}\n" +
        '<div class="kv-upload-progress kv-hidden"></div><div class="clearfix"></div>\n' +
        '<div class="file-caption {class}">\n' +
        '  <div class="input-group {inputGroupClass}">\n' +
        '      {caption}\n<span class="file-caption-icon"></span>\n' +
        ($h.isBs(5) ? "" : '<div class="input-group-btn input-group-append">\n') +
        "      {remove}\n" +
        "      {cancel}\n" +
        "      {pause}\n" +
        "      {upload}\n" +
        "      {browse}\n" +
        ($h.isBs(5) ? "" : "    </div>\n") +
        "  </div>";
      ("</div>");
      tMain2 =
        '{preview}\n<div class="kv-upload-progress kv-hidden"></div>\n<div class="clearfix"></div>\n' +
        '<span class="{class}">{remove}\n{cancel}\n{upload}\n{browse}\n</span>';
      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="bi-file-earmark-arrow-up"></i>';
      // noinspection HtmlUnknownAttribute
      tCaption = '<input readonly class="file-caption-name form-control {class}">\n';
      //noinspection HtmlUnknownAttribute
      tBtnDefault =
        '<button type="{type}" title="{title}" class="{css}" ' + "{status} {tabIndexConfig}>{icon} {label}</button>";
      //noinspection HtmlUnknownTarget,HtmlUnknownAttribute
      tBtnLink = '<a href="{href}" title="{title}" class="{css}" {status} {tabIndexConfig}>{icon} {label}</a>';
      //noinspection HtmlUnknownAttribute
      tBtnBrowse = '<div class="{css}" {status} {tabIndexConfig}>{icon} {label}</div>';
      tModalLabel = $h.MODAL_ID + "Label";
      tModalMain =
        '<div id="' +
        $h.MODAL_ID +
        '" class="file-zoom-dialog modal fade" ' +
        'aria-labelledby="' +
        tModalLabel +
        '" {tabIndexConfig}></div>';
      tModal =
        '<div class="modal-dialog modal-lg{rtl}" role="document">\n' +
        '  <div class="modal-content">\n' +
        '    <div class="modal-header kv-zoom-header">\n' +
        '      <h6 class="modal-title kv-zoom-title" id="' +
        tModalLabel +
        '"><span class="kv-zoom-caption"></span> <span class="kv-zoom-size"></span></h6>\n' +
        '      <div class="kv-zoom-actions">{rotate}{toggleheader}{fullscreen}{borderless}{close}</div>\n' +
        "    </div>\n" +
        '    <div class="floating-buttons"></div>\n' +
        '    <div class="kv-zoom-body file-zoom-content {zoomFrameClass}"></div>\n' +
        "{prev} {next}\n" +
        '    <div class="kv-zoom-description"></div>\n' +
        "  </div>\n" +
        "</div>\n";
      tDescClose = '<button type="button" class="kv-desc-hide" aria-label="Close">{closeIcon}</button>';
      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-primary 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' +
        "        {rotate} {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>";
      tActionRotate =
        '<button type="button" class="kv-file-rotate {rotateClass}" title="{rotateTitle}">' + "{rotateIcon}</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-filename="{filename}" data-template="{template}" data-zoom="{zoomData}"';
      tTagBef1 = tTagBef + '><div class="kv-file-content">\n';
      tTagBef2 = tTagBef + ' title="{caption}"><div class="kv-file-content">\n';
      tTagAft = "</div>{footer}\n{zoomCache}</div>\n";
      tGeneric = "{content}\n";
      tStyle = " {style}";
      tHtml = renderObject("html", "text/html");
      tText = renderObject("text", "text/plain;charset=UTF-8");
      tPdf = renderObject("pdf", "application/pdf");
      tImage =
        '<img src="{data}" class="file-preview-image kv-preview-data" title="{title}" alt="{alt}"' + tStyle + ">\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";
      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">{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,
          descriptionClose: tDescClose,
          progress: tProgress,
          stats: tStats,
          size: tSize,
          footer: tFooter,
          indicator: tIndicator,
          actions: tActions,
          actionDelete: tActionDelete,
          actionRotate: tActionRotate,
          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", position: "relative" },
          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) ||
              $h.compare(vName, /\.(txt|md|nfo|ini|json|php|js|css)$/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,
          showRotate: true,
          removeIcon: '<i class="bi-trash"></i>',
          removeClass: defBtnCss1,
          removeErrorClass: "btn btn-sm btn-kv btn-danger",
          removeTitle: "Remove file",
          uploadIcon: '<i class="bi-upload"></i>',
          uploadClass: defBtnCss1,
          uploadTitle: "Upload file",
          uploadRetryIcon: '<i class="bi-cloud-arrow-up-fill"></i>',
          uploadRetryTitle: "Retry upload",
          downloadIcon: '<i class="bi-download"></i>',
          downloadClass: defBtnCss1,
          downloadTitle: "Download file",
          rotateIcon: '<i class="bi-arrow-clockwise"></i>',
          rotateClass: defBtnCss1,
          rotateTitle: "Rotate 90 deg. clockwise",
          zoomIcon: '<i class="bi-zoom-in"></i>',
          zoomClass: defBtnCss1,
          zoomTitle: "View Details",
          dragIcon: '<i class="bi-arrows-move"></i>',
          dragClass: "text-primary",
          dragTitle: "Move / Rearrange",
          dragSettings: {},
          indicatorNew: '<i class="bi-plus-lg text-warning"></i>',
          indicatorSuccess: '<i class="bi-check-lg text-success"></i>',
          indicatorError: '<i class="bi-exclamation-lg text-danger"></i>',
          indicatorLoading: '<i class="bi-hourglass-bottom text-muted"></i>',
          indicatorPaused: '<i class="bi-pause-fill text-primary"></i>',
          indicatorNewTitle: "Not uploaded yet",
          indicatorSuccessTitle: "Uploaded",
          indicatorErrorTitle: "Upload Error",
          indicatorLoadingTitle: "Uploading &hellip;",
          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") {
            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,
                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 = $h.createDiv();
            $h.setHtml($tmp, 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 && data.content) {
            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, initPreviewShowDel),
            sRot = $h.ifSet("showRotate", config, $h.ifSet("showRotate", fs, true)),
            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, $h.ifSet("showDrag", fs, true)),
            dis = url === false && isDisabled;
          sDwl = sDwl && config.downloadUrl !== false && !!dUrl;
          a = self._renderFileActions(config, false, sDwl, sDel, sRot, sZm, sDrg, dis, url, key, true, dUrl, dFil);
          return self._getLayoutTemplate("footer").setTokens({
            progress: self._renderThumbProgress(),
            actions: a,
            caption: caption,
            size: self._getSize(size),
            width: width,
            indicator: "",
          });
        },
      };
      self.previewCache.init();
    },
    _isPdfRendered: function () {
      var self = this,
        useLib = self.usePdfRenderer,
        flag = typeof useLib === "function" ? useLib() : !!useLib;
      return flag && self.pdfRendererUrl;
    },
    _handler: function ($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 = $h.createDiv();
      $h.setHtml($err, self.$errorContainer.html());
      $err.find(".kv-error-close").remove();
      $err.find("ul").remove();
      return !!$h.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) {
        $h.setHtml($error, 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");
      $h.addCss(self.$caption, "is-invalid");
    },
    _resetErrors: function (fade) {
      var self = this,
        $error = self.$errorContainer,
        history = self.resumableUploadOptions.retainErrorHistory;
      if (self.isPersistentError || (self.enableResumableUpload && history && !self.clearInput)) {
        return;
      }
      self.clearInput = false;
      self.isError = false;
      self.$container.removeClass("has-error");
      self.$caption.removeClass("is-invalid is-valid file-processing");
      $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();
      $error.fadeIn(self.fadeDelay);
      self._raise("filefoldererror", [folders, msg]);
    },
    showUserError: function (msg, params, retainErrorHistory) {
      var self = this,
        fileName;
      if (!self.uploadInitiated) {
        return;
      }
      if (!params || !params.fileId) {
        if (!retainErrorHistory) {
          self.$errorContainer.html("");
        }
      } else {
        if (!retainErrorHistory) {
          self.$errorContainer.find('[data-file-id="' + params.fileId + '"]').remove();
        }
        fileName = self.fileManager.getFileName(params.fileId);
        if (fileName) {
          msg = "<b>" + fileName + ":</b> " + msg;
        }
      }
      self._showFileError(msg, params, "fileusererror");
    },
    _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 {
        $error.find("ul").append($h.cspBuffer.stash(e));
        $h.cspBuffer.apply($error);
      }
      $error.fadeIn(self.fadeDelay);
      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);
      $error.fadeIn(self.fadeDelay);
      self._raise(ev, [params, msg]);
      if (!self.isAjaxUpload) {
        self._clearFileInput();
      }
      self._setValidationError("file-input-new");
      self.$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;
      msg = "<li>" + msg + "</li>";
      if ($error.find("ul").length === 0) {
        self._addError("<ul>" + msg + "</ul>");
      } else {
        $error.find("ul").append(msg);
      }
      self.isError = true;
      self._updateFileDetails(0);
      $error.fadeIn(self.fadeDelay);
      self._raise("fileerror", [params, msg]);
      self._clearFileInput();
      self._setValidationError();
    },
    _parseError: function (operation, jqXHR, errorThrown, fileName) {
      /** @namespace jqXHR.responseJSON */
      var self = this,
        errMsg = $h.trim(errorThrown + ""),
        textPre,
        errText,
        text;
      errText = jqXHR.responseJSON && jqXHR.responseJSON.error ? jqXHR.responseJSON.error.toString() : "";
      text = errText ? errText : jqXHR.responseText;
      if (self.cancelling && self.msgUploadAborted) {
        errMsg = self.msgUploadAborted;
      }
      if (self.showAjaxErrorDetails && text) {
        if (errText) {
          errMsg = $h.trim(errText + "");
        } else {
          text = $h.trim(text.replace(/\n\s*\n/g, "\n"));
          textPre = text.length ? "<pre>" + text + "</pre>" : "";
          errMsg += errMsg ? textPre : text;
        }
      }
      if (!errMsg) {
        errMsg = self.msgAjaxError.replace("{operation}", operation);
      }
      self.cancelling = false;
      return fileName ? "<b>" + fileName + ": </b>" + errMsg : errMsg;
    },
    _parseFileType: function (type, name) {
      var self = this,
        isValid,
        vType,
        cat,
        i,
        types = self.allowedPreviewTypes || [];
      if (type === "application/text-plain") {
        return "text";
      }
      for (i = 0; i < types.length; i++) {
        cat = types[i];
        isValid = self.fileTypeSettings[cat];
        vType = isValid(type, name) ? cat : "";
        if (!$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);
      }
      var out = e.result,
        isAborted = out === false;
      if (e.isDefaultPrevented() || isAborted) {
        return false;
      }
      if (e.type === "filebatchpreupload" && (out || isAborted)) {
        self.ajaxAborted = out;
        return false;
      }
      switch (event) {
        // ignore these events
        case "filebatchuploadcomplete":
        case "filebatchuploadsuccess":
        case "fileuploaded":
        case "fileclear":
        case "filecleared":
        case "filereset":
        case "fileerror":
        case "filefoldererror":
        case "filecustomerror":
        case "filesuccessremove":
          break;
        // receive data response via `filecustomerror` event`
        default:
          if (!self.ajaxAborted) {
            self.ajaxAborted = out;
          }
          break;
      }
      return true;
    },
    _listenFullScreen: function (isFullScreen) {
      var self = this,
        $modal = self.$modal,
        $btnFull,
        $btnBord;
      if (!$modal || !$modal.length) {
        return;
      }
      $btnFull = $modal && $modal.find(".btn-kv-fullscreen");
      $btnBord = $modal && $modal.find(".btn-kv-borderless");
      if (!$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,
        fullScreenEv;
      self._handler($el, "click", function (e) {
        self._initFileSelected();
        if ($el.hasClass("file-no-browse")) {
          if ($el.data("zoneClicked")) {
            $el.data("zoneClicked", false);
          } else {
            e.preventDefault();
          }
        }
      });
      self._handler($el, "change", $.proxy(self._change, self));
      self._handler(self.$caption, "paste", $.proxy(self.paste, self));
      if (self.showBrowse) {
        self._handler(self.$btnFile, "click", $.proxy(self._browse, self));
        self._handler(self.$btnFile, "keypress", function (e) {
          var keycode = e.keyCode || e.which;
          if (keycode === 13) {
            $el.trigger("click");
            self._browse(e);
          }
        });
      }
      self._handler($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);
      });
      fullScreenEv = "webkitfullscreenchange mozfullscreenchange fullscreenchange MSFullscreenChange";
      self._handler($(document), fullScreenEv, function () {
        self._listenFullScreen($h.checkFullScreen());
      });
      self.$caption.on("focus", function () {
        self.$captionContainer.focus();
      });
      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) {
          if (path) {
            file.newPath = path + file.name;
          }
          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,
        dt = e.originalEvent.dataTransfer,
        hasFiles = $.inArray("Files", dt.types) > -1;
      self._zoneDragDropInit(e);
      if (self.isDisabled || !hasFiles) {
        dt.effectAllowed = "none";
        dt.dropEffect = "none";
        return;
      }
      dt.dropEffect = "copy";
      if (self._raise("fileDragEnter", { sourceEvent: e, files: dt.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");
      }
    },
    _dropFiles: function (e, files) {
      var self = this,
        $el = self.$element;
      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");
    },
    _addFilesFromSystem: function (e, dt, type) {
      var self = this,
        i,
        files = dt.files,
        items = dt.items,
        folders = $h.getDragDropFolders(items);
      e.preventDefault();
      if (self.isDisabled || $h.isEmpty(files) || !files.length) {
        console.log("No valid copied files found in clipboard for pasting.");
        return;
      }
      if (!self._raise(type, { 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 () {
          self._dropFiles(e, files);
        }, 500);
      } else {
        self._dropFiles(e, files);
      }
    },
    _zoneDrop: function (e) {
      /** @namespace e.originalEvent.dataTransfer */
      var self = this,
        i,
        $el = self.$element,
        dt = e.originalEvent.dataTransfer;
      self._addFilesFromSystem(e, dt, "fileDragDrop");
    },
    _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") {
          e.preventDefault();
          $form = $btn.closest("form");
          // downgrade to normal form submit if possible
          if ($form.length) {
            $form.trigger("submit");
          }
        }
        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);
        $thumb.remove();
      });
      if (!self.getFrames().length || !self.showPreview) {
        self._resetUpload();
      }
      self._validateDefaultPreview();
    },
    _initSortable: function () {
      var self = this,
        $el = self.$preview,
        settings,
        selector = "." + $h.SORT_CSS,
        $cont,
        $body = $("body"),
        $html = $("html"),
        rev = self.reversePreviewOrder,
        Sortable = window.Sortable,
        beginGrab,
        endGrab;
      if (!Sortable || $el.find(selector).length === 0) {
        return;
      }
      $cont = $body.length ? $body : $html.length ? $html : self.$container;
      beginGrab = function () {
        $cont.addClass("file-grabbing");
      };
      endGrab = function () {
        $cont.removeClass("file-grabbing");
      };
      settings = {
        handle: ".drag-handle-init",
        dataIdAttr: "data-fileid",
        animation: 600,
        draggable: selector,
        scroll: false,
        forceFallback: true,
        onChoose: beginGrab,
        onStart: beginGrab,
        onUnchoose: endGrab,
        onEnd: endGrab,
        onSort: function (e) {
          var oldIndex = e.oldIndex,
            newIndex = e.newIndex,
            i = 0,
            len = self.initialPreviewConfig.length,
            exceedsLast = len > 0 && newIndex >= len,
            $item = $(e.item),
            $first;
          if (exceedsLast) {
            newIndex = len - 1;
          }
          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++;
          });
          if (exceedsLast) {
            $first = self.getFrames(":not(.file-preview-initial):first");
            if ($first.length) {
              $item.slideUp(function () {
                $item.insertBefore($first).slideDown();
              });
            }
          }
          self._raise("filesorted", {
            previewId: $item.attr("id"),
            oldIndex: oldIndex,
            newIndex: newIndex,
            stack: self.initialPreviewConfig,
          });
        },
      };
      $.extend(true, settings, self.fileActionSettings.dragSettings);
      if (self.sortable) {
        self.sortable.destroy();
      }
      self.sortable = Sortable.create($el[0], settings);
    },
    _setPreviewContent: function (content) {
      var self = this;
      $h.setHtml(self.$preview, content);
      self._autoFitContent();
    },
    _initPreviewImageOrientations: function () {
      var self = this,
        i = 0,
        canOrientImage = self.canOrientImage;
      if (!self.autoOrientImageInitial && !canOrientImage) {
        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");
          if (canOrientImage) {
            $img.css("image-orientation", self.autoOrientImageInitial ? "from-image" : "none");
          } else {
            self.setImageOrientation($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] || "") + '" ',
        tag = $h.isBs(5) ? "bs-" : "",
        params = title + (type === "close" ? " data-" + tag + 'dismiss="modal" aria-hidden="true"' : "");
      if (type === "fullscreen" || type === "borderless" || type === "toggleheader") {
        params += ' data-toggle="button" aria-pressed="false"';
      }
      return '<button type="button" class="' + css + " btn-kv-" + type + '"' + params + ">" + label + "</button>";
    },
    _getModalContent: function () {
      var self = this;
      return self._getLayoutTemplate("modal").setTokens({
        rtl: self.rtl ? " kv-rtl" : "",
        zoomFrameClass: self.frameClass,
        prev: self._getZoomButton("prev"),
        next: self._getZoomButton("next"),
        rotate: self._getZoomButton("rotate"),
        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) {
        if (e.namespace !== "bs.modal") {
          return;
        }
		if (event == "hide") {
			$modal.data('angle', 0);
		}
        var $btnFull = $modal.find(".btn-fullscreen"),
          $btnBord = $modal.find(".btn-borderless");
        if ($modal.data("fileinputPluginId") === self.$element.attr("id")) {
          self._raise("filezoom" + event, getParams(e));
        }
        if (event === "shown") {
          self._handleRotation($modal, $modal.find(".file-zoom-detail"), $modal.data("angle"));
          $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 = "#" + $h.MODAL_ID;
      modalMain = self._setTabIndex("modal", modalMain);
      if (!self.showPreview) {
        return;
      }
      self.$modal = $(modalId);
      if (!self.$modal || !self.$modal.length) {
        $dialog = $h.createElement($h.cspBuffer.stash(modalMain)).insertAfter(self.$container);
        self.$modal = $(modalId).insertBefore($dialog);
        $h.cspBuffer.apply(self.$modal);
        $dialog.remove();
      }
      $h.initModal(self.$modal);
      self.$modal.html($h.cspBuffer.stash(self._getModalContent()));
      $h.cspBuffer.apply(self.$modal);
      $.each($h.MODAL_EVENTS, function (key, event) {
        self._listenModalEvent(event);
      });
    },
    _initZoomButtons: function () {
      var self = this,
        $modal = self.$modal,
        previewId = $modal.data("previewId") || "",
        $first,
        $last,
        thumbs = self.getFrames().toArray(),
        len = thumbs.length,
        $prev = $modal.find(".btn-kv-prev"),
        $next = $modal.find(".btn-kv-next"),
        $rotate = $modal.find(".btn-kv-rotate");
      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");
      $next.removeAttr("disabled");
      if (self.reversePreviewOrder) {
        [$prev, $next] = [$next, $prev]; // swap
      }
      if ($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(".kv-zoom-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-kv-fullscreen"),
        $btnBord = $modal.find(".btn-kv-borderless");
      if ($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, navigate) {
      var self = this,
        $content,
        tmplt,
        body,
        $body,
        $dataEl,
        config,
        previewId = $frame.attr("id"),
        $zoomPreview = self._getZoom(previewId),
        $modal = self.$modal,
        $tmp,
        desc,
        $desc,
        $btnFull = $modal.find(".btn-kv-fullscreen"),
        $btnBord = $modal.find(".btn-kv-borderless"),
        cap,
        size,
        $btnTogh = $modal.find(".btn-kv-toggleheader"),
        parsed,
        zoomData = $frame.data("zoom");
      if (zoomData) {
        zoomData = decodeURIComponent(zoomData);
        parsed = $zoomPreview.html().replace(self.zoomPlaceholder, "").setTokens({ zoomData: zoomData });
        $h.setHtml($zoomPreview, parsed);
        $frame.data("zoom", "");
        $zoomPreview.attr("data-zoom", zoomData);
      }
      tmplt = $zoomPreview.attr("data-template") || "generic";
      $content = $zoomPreview.find(".kv-file-content");
      body = $content.length ? $content.html() : "";
      cap = $frame.data("caption") || self.msgZoomModalHeading;
      size = $frame.data("size") || "";
      desc = $frame.data("description") || "";
      $h.setHtml($modal.find(".kv-zoom-caption").attr("title", cap), cap);
      $h.setHtml($modal.find(".kv-zoom-size"), size);
      $desc = $modal.find(".kv-zoom-description").hide();
      if (desc) {
        if (self.showDescriptionClose) {
          desc =
            self._getLayoutTemplate("descriptionClose").setTokens({
              closeIcon: self.previewZoomButtonIcons.close,
            }) +
            "</button>" +
            desc;
        }
        $h.setHtml($desc, desc).show();
        if (self.showDescriptionClose) {
          self._handler($modal.find(".kv-desc-hide"), "click", function () {
            $(this)
              .parent()
              .fadeOut("fast", function () {
                $modal.focus();
              });
          });
        }
      }
      $body = $modal.find(".kv-zoom-body");
      $modal.removeClass("kv-single-content");
      if (navigate) {
        $tmp = $body.addClass("file-thumb-loading").clone().insertAfter($body);
        $h.setHtml($body, body).hide();
        $tmp.fadeOut("fast", function () {
          $body.fadeIn("fast", function () {
            $body.removeClass("file-thumb-loading");
          });
          $tmp.remove();
        });
      } else {
        $h.setHtml($body, 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-kv-prev"), "click", function () {
        self._zoomSlideShow("prev", previewId);
      });
      self._handler($modal.find(".btn-kv-next"), "click", function () {
        self._zoomSlideShow("next", previewId);
      });
      self._handler($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(".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,
          delay = self.processDelay + 1,
          $prev = $(this).find(".btn-kv-prev"),
          $next = $(this).find(".btn-kv-next"),
          vId = $(this).data("previewId"),
          vPrevKey,
          vNextKey;
        [vPrevKey, vNextKey] = self.rtl ? [39, 37] : [37, 39];
        $.each({ prev: [$prev, vPrevKey], next: [$next, vNextKey] }, function (direction, config) {
          var $btn = config[0],
            vKey = config[1];
          if (key === vKey && $btn.length) {
            $modal.focus();
            if (!$btn.attr("disabled")) {
              $btn.blur();
              setTimeout(function () {
                $btn.focus();
                self._zoomSlideShow(direction, vId);
                setTimeout(function () {
                  if ($btn.attr("disabled")) {
                    $modal.focus();
                  }
                }, delay);
              }, delay);
            }
          }
        });
      });
    },
    _showModal: function ($frame) {
      var self = this,
        $modal = self.$modal,
        $content,
        css,
        angle;
      if (!$frame || !$frame.length) {
        return;
      }
      $h.initModal($modal);
      $h.setHtml($modal, self._getModalContent());
      self._setZoomContent($frame);
      $modal.removeClass("rotatable");
      $modal.data({ backdrop: false, fileinputPluginId: self.$element.attr("id") });
      $modal.find(".kv-zoom-body").css("height", self.zoomModalHeight);
      $content = $frame.find(".kv-file-content > :first-child");
      if ($content.length) {
        css = $content.css("transform");
        if (css) {
          $modal.find(".file-zoom-detail").css("transform", css);
        }
      }
      if ($frame.hasClass("rotatable")) {
        $modal.addClass("rotatable");
      }
      if ($frame.data("angle")) {
        $modal.data("angle", $frame.data("angle"));
      }
      angle = $frame.data("angle") || 0;
      $modal.modal("show");
      self._initZoomButtons();
      self._initRotateZoom($frame, $content);
    },
    _zoomPreview: function ($btn) {
      var self = this,
        $frame;
      if (!$btn.length) {
        throw "Cannot zoom to detailed preview!";
      }
      $frame = $btn.closest($h.FRAMES);
      self._showModal($frame);
    },
    _zoomSlideShow: function (dir, previewId) {
      var self = this,
        $modal = self.$modal,
        $btn = $modal.find(".kv-zoom-actions .btn-kv-" + dir),
        $targFrame,
        i,
        $thumb,
        thumbsData = self.getFrames().toArray(),
        thumbs = [],
        len = thumbsData.length,
        out,
        angle,
        $content;
      if (self.reversePreviewOrder) {
        dir = dir === "prev" ? "next" : "prev";
      }
      if ($btn.attr("disabled")) {
        return;
      }
      for (i = 0; i < len; i++) {
        $thumb = $(thumbsData[i]);
        if ($thumb && $thumb.length && $thumb.find(".kv-file-zoom:visible").length) {
          thumbs.push(thumbsData[i]);
        }
      }
      len = thumbs.length;
      for (i = 0; i < len; i++) {
        if ($(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($targFrame, dir);
      }
      self._initZoomButtons();
      if ($targFrame.length && $targFrame.hasClass("rotatable")) {
        angle = $targFrame.data("angle") || 0;
        $modal.addClass("rotatable").data("angle", angle);
        $content = $targFrame.find(".kv-file-content > :first-child");
        self._initRotateZoom($targFrame, $content);
      } else {
        $modal.removeClass("rotatable").removeData("angle");
      }
      self._raise("filezoom" + dir, { previewId: previewId, modal: self.$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[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 = $.extend(true, [], self.getFileList());
          self.fileManager.clear();
          self._clearFileInput();
        } else {
          files = self.$element[0].files;
        }
      } else {
        files = self.$element[0].files;
      }
      if (files && files.length) {
        self.readFiles(files);
      }
    },
    _clearObjects: function ($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.uploadInitiated = false;
      self.uploadStartTime = $h.now();
      self.uploadCache = [];
      self.$btnUpload.removeAttr("disabled");
      self._setProgress(0);
      self._hideProgress();
      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.imageCanvas && self.imageCanvasContext) {
        self.imageCanvasContext.clearRect(0, 0, self.imageCanvas.width, self.imageCanvas.height);
      }
    },
    _hasInitialPreview: function () {
      var self = this;
      return !self.overwriteInitial && self.previewCache.count(true);
    },
    _resetPreview: function () {
      var self = this,
        out,
        cap,
        $div,
        hasSuc = self.showUploadedThumbs,
        hasErr = !self.removeFromPreviewOnError,
        includeProcessed = (hasSuc || hasErr) && self.isDuplicateError;
      if (self.previewCache.count(true)) {
        out = self.previewCache.out();
        if (includeProcessed) {
          $div = $h.createDiv().insertAfter(self.$container);
          self.getFrames().each(function () {
            var $thumb = $(this);
            if (
              (hasSuc && $thumb.hasClass("file-preview-success")) ||
              (hasErr && $thumb.hasClass("file-preview-error"))
            ) {
              $div.append($thumb);
            }
          });
        }
        self._setPreviewContent(out.content);
        self._setInitThumbAttr();
        cap = self.initialCaption ? self.initialCaption : out.caption;
        self._setCaption(cap);
        if (includeProcessed) {
          $div.contents().appendTo(self.$preview);
          $div.remove();
        }
      } else {
        self._clearPreview();
        self._initCaption();
      }
      if (self.showPreview) {
        self._initZoom();
        self._initSortable();
      }
      self.isDuplicateError = false;
    },
    _clearDefaultPreview: function () {
      var self = this;
      self.$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, processing) {
      var self = this,
        strFiles = n === 1 ? self.fileSingle : self.filePlural;
      return n > 0
        ? self.msgSelected.replace("{n}", n).replace("{files}", strFiles)
        : processing
        ? self.msgProcessing
        : 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) {
      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, 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,
        tm = self.taskManager;
      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);
        },
        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);
      tm.addTask(fileId + "-" + index, function () {
        var self = this.self,
          config,
          xhr;
        config = self.ajaxQueue.shift();
        xhr = $.ajax(config);
        self.ajaxRequests.push(xhr);
      }).runWithContext({ self: self });
    },
    _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,
        content,
        config,
        tags,
        id,
        i;
      if (!self.showPreview || typeof out !== "object" || $.isEmptyObject(out)) {
        self._resetCaption();
        return;
      }
      if (out.initialPreview !== undefined && out.initialPreview.length > 0) {
        self.hasInitData = true;
        content = out.initialPreview || [];
        config = out.initialPreviewConfig || [];
        tags = out.initialPreviewThumbTags || [];
        append = out.append === undefined || out.append;
        if (content.length > 0 && !$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 = $h.createElement($h.cspBuffer.stash(data)).hide().appendTo($thumb);
            $h.cspBuffer.apply($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();
              $thumb.remove();
              $div.remove();
              self._initSortable();
            });
          } else {
            id = $thumb.attr("id");
            i = self._getUploadCacheIndex(id);
            if (i !== null) {
              self.uploadCache[i] = {
                id: id,
                content: content[0],
                config: config[0] || [],
                tags: tags[0] || [],
                append: append,
              };
            }
          }
        } else {
          self.previewCache.set(content, config, tags, append);
          self._initPreview();
          self._initPreviewActions();
        }
      }
      self._resetCaption();
    },
    _getUploadCacheIndex: function (id) {
      var self = this,
        i,
        len = self.uploadCache.length,
        config;
      for (i = 0; i < len; i++) {
        config = self.uploadCache[i];
        if (config.id === id) {
          return i;
        }
      }
      return null;
    },
    _initSuccessThumbs: function () {
      var self = this;
      if (!self.showPreview) {
        return;
      }
      setTimeout(function () {
        self._getThumbs($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;
            }
            self.$caption.attr("title", "");
            $thumb.fadeOut("slow", function () {
              var fm = self.fileManager;
              $thumb.remove();
              if (!self.getFrames().length) {
                self.reset();
              }
            });
          });
        });
      }, self.processDelay);
    },
    _updateInitialPreview: function () {
      var self = this,
        u = self.uploadCache;
      if (self.showPreview) {
        $.each(u, function (key, setting) {
          self.previewCache.add(setting.content, setting.config, setting.tags, setting.append);
        });
        if (self.hasInitData) {
          self._initPreview();
          self._initPreviewActions();
        }
      }
    },
    _getThumbFileId: function ($thumb) {
      var self = this;
      if (self.showPreview && $thumb !== undefined) {
        return $thumb.attr("data-fileid");
      }
      return null;
    },
    _getThumbFile: function ($thumb) {
      var self = this,
        id = self._getThumbFileId($thumb);
      return id ? self.fileManager.getFile(id) : null;
    },
    _uploadSingle: function (i, id, isBatch, deferrer) {
      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),
        resolve = function () {
          if (deferrer && deferrer.resolve) {
            deferrer.resolve();
          }
        },
        reject = function () {
          if (deferrer && deferrer.reject) {
            deferrer.reject();
          }
        };
      if (self.enableResumableUpload) {
        // not enabled for resumable uploads
        return;
      }
      self.uploadInitiated = true;
      if (self.showPreview) {
        $thumb = fm.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();
        }
      };
      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, $h.SORT_CSS);
            self._initSortable();
          }
          self._raise("filebatchuploadcomplete", [fm.stack, self._getExtraData()]);
          if (!self.retryErrorUploads || errCount === 0) {
            fm.clear();
          }
          self._setProgress(101);
          self.ajaxAborted = false;
          self.uploadInitiated = false;
        }, self.processDelay);
      };
      fnBefore = function (jqXHR) {
        outData = self._getOutData(formdata, jqXHR);
        fm.initStats(id);
        self.fileBatchCompleted = false;
        if (!isBatch) {
          self.ajaxAborted = false;
        }
        if (self.showPreview) {
          if (!$thumb.hasClass("file-preview-success")) {
            self._setThumbStatus($thumb, "Loading");
            $h.addCss($thumb, "file-uploading");
          }
          $btnUpload.attr("disabled", true);
          $btnDelete.attr("disabled", true);
        }
        if (!isBatch) {
          self.lock();
        }
        if (fm.errors.indexOf(id) !== -1) {
          delete fm.errors[id];
        }
        self._raise("filepreupload", [outData, previewId, i, self._getThumbFileId($thumb)]);
        $.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._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, $prog);
            }
            self._raise("fileuploaded", [outData, pid, i, self._getThumbFileId($thumb)]);
            if (!isBatch) {
              self.fileManager.remove($thumb);
            } else {
              updateUploadLog();
              resolve();
            }
          } else {
            uploadFailed = true;
            errMsg = self._parseError(op, jqXHR, self.msgUploadError, self.fileManager.getFileName(id));
            self._showFileError(errMsg, params);
            self._setPreviewError($thumb, true);
            if (!self.retryErrorUploads) {
              $btnUpload.hide();
            }
            if (isBatch) {
              updateUploadLog();
              resolve();
            }
            self._setProgress(101, self._getFrame(pid).find(".file-thumb-progress"), self.msgUploadError);
          }
        }, self.processDelay);
      };
      fnComplete = 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();
      };
      fnError = function (jqXHR, textStatus, errorThrown) {
        errMsg = self._parseError(op, jqXHR, errorThrown, self.fileManager.getFileName(id));
        uploadFailed = true;
        setTimeout(function () {
          var $prog;
          if (isBatch) {
            updateUploadLog();
            reject();
          }
          self.fileManager.setProgress(id, 100);
          self._setPreviewError($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);
      };
      self._setFileData(formdata, fileObj.file, fileName, id);
      self._setUploadData(formdata, { fileId: id });
      self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata, id, i);
    },
    _setFileData: function (formdata, file, fileName, fileId) {
      var self = this,
        preProcess = self.preProcessUpload;
      if (preProcess && typeof preProcess === "function") {
        formdata.append(self.uploadFileAttr, preProcess(fileId, file));
      } else {
        formdata.append(self.uploadFileAttr, file, fileName);
      }
    },
    _checkBatchPreupload: function (outData, jqXHR) {
      var self = this,
        out = self._raise("filebatchpreupload", [outData]);
      if (out) {
        return true;
      }
      self._abort(outData);
      if (jqXHR) {
        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");
        $btnDelete.removeAttr("disabled");
      });
      self._setProgressCancelled();
      return false;
    },
    _uploadBatch: function () {
      var self = this,
        fm = self.fileManager,
        total = fm.total(),
        params = {},
        fnBefore,
        fnSuccess,
        fnError,
        fnComplete,
        hasPostData = total > 0 || !$.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._checkBatchPreupload(outData, jqXHR);
      };
      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);
          $thumb.removeClass("file-uploading");
          if (self._getThumbFile($thumb)) {
            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)) {
          self._setFileData(formdata, data.file, data.nameFmt || "untitled_" + ctr, key);
        }
        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;
      fnBefore = function (jqXHR) {
        self.lock();
        var outData = self._getOutData(formdata, jqXHR);
        self._setProgress(50);
        params.data = outData;
        params.xhr = jqXHR;
        self._checkBatchPreupload(outData, jqXHR);
      };
      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", $h.INIT_FLAG + nInd);
            }
          }
        });
      }
    },
    _resetCaption: function () {
      var self = this;
      setTimeout(function () {
        var cap = "",
          n,
          chk = self.previewCache.count(true),
          len = self.fileManager.count(),
          file,
          incomplete = ":not(.file-preview-success):not(.file-preview-error)",
          cfg,
          hasThumb = self.showPreview && self.getFrames(incomplete).length;
        if (len === 0 && chk === 0 && !hasThumb) {
          self.reset();
        } else {
          n = chk + len;
          if (n > 1) {
            cap = self._getMsgSelected(n);
          } else {
            if (len === 0) {
              cfg = self.initialPreviewConfig[0];
              cap = "";
              if (cfg) {
                cap = cfg.caption || cfg.filename || "";
              }
              if (!cap) {
                cap = self._getMsgSelected(n);
              }
            } else {
              file = self.fileManager.getFirstFile();
              cap = file ? file.nameFmt : "_";
            }
          }
          self._setCaption(cap);
        }
      }, self.processDelay);
    },
    _handleRotation: function ($el, $content, angle) {
      var self = this,
        css,
        newCss,
        addCss = "",
        scale = 1,
        elContent = $content[0],
        quadrant,
        transform,
        h,
        w,
        wNew,
        $parent = $content.parent(),
        hParent,
        wParent,
        $body = $("body"),
        bodyExists = !!$body.length;
      if (bodyExists) {
        $body.addClass("kv-overflow-hidden");
      }
      if (!$content.length || $el.hasClass("hide-rotate")) {
        if (bodyExists) {
          $body.removeClass("kv-overflow-hidden");
        }
        return;
      }
      transform = $content.css("transform");
      if (transform) {
        $content.css("transform", "none");
      }
      if (transform) {
        $content.css("transform", transform);
      }
      angle = angle || 0;
      quadrant = angle % 360;
      css = "rotate(" + angle + "deg)";
      newCss = "rotate(" + quadrant + "deg)";
      addCss = "";
      if (quadrant === 90 || quadrant === 270) {
        w = elContent.naturalWidth || $content.outerWidth() || 0;
        h = elContent.naturalHeight || $content.outerHeight() || 0;
        scale = w > h && w != 0 ? (h / w).toFixed(2) : 1;
        if ($parent.length) {
          hParent = $parent.height();
          wParent = $parent.width();
          wNew = Math.min(w, wParent);
          if (hParent > scale * wNew) {
            scale = wNew > hParent && wNew != 0 ? (hParent / wNew).toFixed(2) : 1;
          }
        }
        if (scale !== 1) {
          addCss = " scale(" + scale + ")";
        }
      }
      $content.addClass("rotate-animate").css("transform", css + addCss);
      setTimeout(function () {
        $content.removeClass("rotate-animate").css("transform", newCss + addCss);
        if (bodyExists) {
          $body.removeClass("kv-overflow-hidden");
        }
        $el.data("angle", quadrant);
      }, self.fadeDelay);
    },
    _initRotateButton: function () {
      var self = this;
      self.getFrames(".rotatable .kv-file-rotate").each(function () {
        var $el = $(this),
          $frame = $el.closest($h.FRAMES),
          $content = $frame.find(".kv-file-content > :first-child");
        self._handler($el, "click", function () {
          var angle = ($frame.data("angle") || 0) + 90;
          self._handleRotation($frame, $content, angle);
        });
      });
    },
    _initRotateZoom: function ($frame, $content) {
      var self = this,
        $modal = self.$modal,
        $rotate = $modal.find(".btn-kv-rotate"),
        angle = $frame.data("angle");
      $modal.data("angle", angle);
      if ($rotate.length) {
        $rotate.off("click");
        if ($modal.hasClass("rotatable")) {
          $rotate.on("click", function () {
            angle = ($modal.data("angle") || 0) + 90;
            $modal.data("angle", angle);
            self._handleRotation($modal, $modal.find(".file-zoom-detail"), angle);
            self._handleRotation($frame, $content, angle);
            if ($frame.hasClass("hide-rotate")) {
              $frame.data("angle", angle);
            }
          });
        }
      }
    },
    _initFileActions: function () {
      var self = this;
      if (!self.showPreview) {
        return;
      }
      self._initZoomButton();
      self._initRotateButton();
      self.getFrames(" .kv-file-remove").each(function () {
        var $el = $(this),
          $frame = $el.closest($h.FRAMES),
          hasError,
          id = $frame.attr("id"),
          ind = $frame.attr("data-fileindex"),
          status,
          fm = self.fileManager;
        self._handler($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);
          $frame.fadeOut("slow", function () {
            self.fileManager.remove($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();
            self._resetCaption();
            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 = self._getThumbFileId($frame);
          self._hideProgress();
          if ($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 = "";
          } else {
            self._resetCaption();
          }
        };
      self._initZoomButton();
      self._initRotateButton();
      $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 && (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]);
            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]);
          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, skipTemplate, sizeUnits) {
      var self = this,
        size = parseFloat(bytes),
        i = 0,
        factor = self.bytesToKB,
        func = self.fileSizeGetter,
        out,
        sizeHuman = size,
        newSize;
      if (!$h.isNumeric(bytes) || !$h.isNumeric(size)) {
        return "";
      }
      if (typeof func === "function") {
        out = func(size);
      } else {
        if (!sizeUnits) {
          sizeUnits = self.sizeUnits;
        }
        if (size > 0) {
          while (sizeHuman >= factor) {
            sizeHuman /= factor;
            ++i;
          }
          if (!sizeUnits[i]) {
            sizeHuman = size;
            i = 0;
          }
        }
        newSize = sizeHuman.toFixed(2);
        if (newSize == sizeHuman) {
          newSize = sizeHuman;
        }
        out = newSize + " " + sizeUnits[i];
      }
      return skipTemplate ? out : 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,
      fnameUpdated,
      frameClass,
      foot,
      ind,
      templ,
      attrs,
      zoomData
    ) {
      var self = this,
        caption = self.slug(fname),
        prevContent,
        zoomContent = "",
        styleAttribs = "",
        filename = fnameUpdated || fname,
        isIconic,
        ext = filename.split(".").pop().toLowerCase(),
        screenW = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
        config,
        title = caption,
        alt = caption,
        typeCss = "type-default",
        getContent,
        addFrameCss,
        footer = foot || self._renderFileFooter(cat, caption, size, "auto", isError),
        isRotatable,
        alwaysPreview = $.inArray(ext, self.alwaysPreviewFileExtensions) !== -1,
        forcePrevIcon = self.preferIconicPreview && !alwaysPreview,
        forceZoomIcon = self.preferIconicZoomPreview && !alwaysPreview,
        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 (vCat, vData, zoom, frameCss, vZoomData) {
        var id = zoom ? "zoom-" + previewId : previewId,
          tmplt = self._getPreviewTemplate(vCat),
          css = (frameClass || "") + " " + frameCss,
          tokens;
        if (self.frameClass) {
          css = self.frameClass + " " + css;
        }
        if (zoom) {
          css = css.replace(" " + $h.SORT_CSS, "");
        }
        tmplt = self._parseFilePreviewIcon(tmplt, fname);
        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) {
            alt = title = attrs.alt;
          }
        }
        tokens = {
          previewId: id,
          caption: caption,
          title: title,
          alt: alt,
          frameClass: css,
          type: self._getFileType(ftype),
          fileindex: ind,
          fileid: fileId || "",
          filename: filename,
          typeCss: typeCss,
          footer: footer,
          data: zoom && vZoomData ? self.zoomPlaceholder + "{zoomData}" : vData,
          template: templ || cat,
          style: styleAttribs ? 'style="' + styleAttribs + '"' : "",
          zoomData: vZoomData ? encodeURIComponent(vZoomData) : "",
        };
        if (zoom) {
          tokens.zoomCache = "";
          tokens.zoomData = "{zoomData}";
        }
        return tmplt.setTokens(tokens);
      };
      ind = ind || previewId.slice(previewId.lastIndexOf("-") + 1);
      isRotatable = self.fileActionSettings.showRotate && $.inArray(ext, self.rotatableFileExtensions) !== -1;
      if (self.fileActionSettings.showZoom) {
        addFrameCss = "kv-zoom-thumb";
        if (isRotatable) {
          addFrameCss += " rotatable" + (forceZoomIcon ? " hide-rotate" : "");
        }
        zoomContent = getContent(forceZoomIcon ? "other" : cat, data, true, addFrameCss, zoomData);
      }
      zoomContent = "\n" + self._getLayoutTemplate("zoomCache").replace("{zoomContent}", zoomContent);
      if (typeof self.sanitizeZoomCache === "function") {
        zoomContent = self.sanitizeZoomCache(zoomContent);
      }
      addFrameCss = "kv-preview-thumb";
      if (isRotatable) {
        isIconic = forcePrevIcon || self.hideThumbnailContent || !!self.previewFileIconSettings[ext];
        addFrameCss += " rotatable" + (isIconic ? " hide-rotate" : "");
      }
      prevContent = getContent(forcePrevIcon ? "other" : cat, data, false, addFrameCss, zoomData);
      return prevContent.setTokens({ zoomCache: zoomContent });
    },
    _addToPreview: function ($preview, content) {
      var self = this,
        $el;
      content = $h.cspBuffer.stash(content);
      $el = self.reversePreviewOrder ? $preview.prepend(content) : $preview.append(content);
      $h.cspBuffer.apply($preview);
      return $el;
    },
    _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,
        content,
        caption = fileInfo.name,
        cat = self._parseFileType(ftype, fname),
        $preview = self.$preview,
        fsize = file.size || 0,
        iData = cat === "image" ? theFile.target.result : data,
        fm = self.fileManager,
        fileId = fm.getId(file),
        previewId = self._getThumbId(fileId);
      /** @namespace window.DOMPurify */
      content = self._generatePreviewTemplate(
        cat,
        iData,
        fname,
        ftype,
        previewId,
        fileId,
        false,
        fsize,
        fileInfo.filename
      );
      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, description) {
      var self = this,
        $frame = self._getFrame(id);
      if ($frame.length) {
        size = size && size > 0 ? self._getSize(size) : "";
        $frame.data({ caption: caption, size: size, description: description || "" });
      }
    },
    _setInitThumbAttr: function () {
      var self = this,
        data = self.previewCache.data,
        len = self.previewCache.count(true),
        config,
        caption,
        size,
        description,
        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);
        description = $h.ifSet("description", config);
        self._setThumbAttr(previewId, caption, size, description);
      }
    },
    _slugDefault: function (text) {
      // noinspection RegExpRedundantEscape
      return $h.isEmpty(text, true) ? "" : 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] && $el[0].files[0].name);
      if (!name && self.fileManager.count() > 0) {
        file = self.fileManager.getFirstFile();
        label = file.nameFmt;
      } else {
        label = name ? self.slug(name) : "_";
      }
      n = self.isAjaxUpload ? self.fileManager.count() : numFiles;
      nFiles = self.previewCache.count(true) + n;
      log = n === 1 ? label : self._getMsgSelected(nFiles, !self.isAjaxUpload && !self.isError);
      if (self.isError) {
        self.$previewContainer.removeClass("file-thumb-loading");
        self._initCapStatus();
        self.$previewStatus.html("");
        self.$captionContainer.removeClass("icon-visible");
      } else {
        self._showFileIcon();
      }
      self._setCaption(log, self.isError);
      self.$container.removeClass("file-input-new file-input-ajax-new");
      self._raise("fileselect", [numFiles, label]);
      if (self.previewCache.count(true)) {
        self._initPreviewActions();
      }
    },
    _setThumbStatus: function ($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();
      }
      $h.setHtml($indicator, 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 });
        $h.setHtml($el, out);
        if (error) {
          $h.setHtml($el.find('[role="progressbar"]'), error);
        }
      }
    },
    _hasFiles: function () {
      var el = this.$element[0];
      return !!(el && el.files && el.files.length);
    },
    _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 ||
        $zone.length === 0 ||
        self.fileManager.count() > 0 ||
        !self.dropZoneEnabled ||
        self.previewCache.count() > 0 ||
        (!self.isAjaxUpload && self._hasFiles())
      ) {
        return;
      }
      if ($zone.find($h.FRAMES).length === 0 && $h.isEmpty(self.defaultPreviewContent)) {
        $zone.prepend($h.cspBuffer.stash('<div class="' + self.dropZoneTitleClass + '">' + title + "</div>"));
        $h.cspBuffer.apply($zone);
      }
      self.$container.removeClass("file-input-new");
      if (self.isAjaxUpload) {
        $h.addCss(self.$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;
    },
    _toggleResumableProgress: function (template, message) {
      var self = this,
        $progress = self.$progress;
      if ($progress && $progress.length) {
        $h.setHtml(
          $progress,
          template.setTokens({
            percent: 101,
            status: message,
            stats: "",
          })
        );
      }
    },
    _setFileUploadStats: function (id, pct, stats) {
      var self = this,
        $prog = self.$progress;
      if (!self.showPreview && (!$prog || !$prog.length)) {
        return;
      }
      var fm = self.fileManager,
        rm = self.resumableManager,
        $thumb = fm.getThumb(id),
        pctTot,
        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);
      $h.setHtml($btn, icon);
    },
    _isValidSize: function (size, type, $image, $thumb, filename, params) {
      var self = this,
        msg,
        dim,
        $img,
        tag = size === "Small" ? "min" : "max",
        limit = self[tag + "Image" + type];
      if ($h.isEmpty(limit) || !$image.length) {
        return true;
      }
      $img = $image[0];
      dim = type === "Width" ? $img.naturalWidth || $img.width : $img.naturalHeight || $img.height;
      if (size === "Small" ? dim >= limit : dim <= limit) {
        return true;
      }
      msg = self["msgImage" + type + size] || 'Image "{name}" has a size validation error (limit "{size}").';
      self._showFileError(msg.setTokens({ name: filename, size: limit, dimension: dim }), params);
      self._setPreviewError($thumb);
      self.fileManager.remove($thumb);
      self._clearFileInput();
      return false;
    },
    _getExifObj: function (data) {
      var self = this,
        exifObj,
        error = $h.logMessages.exifWarning;
      if (data.slice(0, 23) !== "data:image/jpeg;base64," && data.slice(0, 22) !== "data:image/jpg;base64,") {
        exifObj = null;
        return;
      }
      try {
        exifObj = window.piexif ? window.piexif.load(data) : null;
      } catch (err) {
        exifObj = null;
        error = (err && err.message) || "";
      }
      if (!exifObj && self.showExifErrorLog) {
        self._log($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 = $h.createDiv().appendTo($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[0],
          zoomImg = $zoomImg && $zoomImg.length ? $zoomImg[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 = null,
        value,
        autoOrientImage = self.autoOrientImage,
        selector;
      exifObj = self._getExifObj(iData);
      if (self.canOrientImage) {
        $img.css("image-orientation", autoOrientImage ? "from-image" : "none");
        self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
        return;
      }
      selector = $h.getZoomSelector(previewId, " img");
      value = exifObj ? exifObj["0th"][piexif.ImageIFD.Orientation] : null; // jshint ignore:line
      if (!value) {
        self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
        return;
      }
      self.setImageOrientation($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";
      $img
        .one("load", function () {
          if ($img.data("validated")) {
            return;
          }
          $img.data("validated", true);
          w1 = $thumb.width();
          w2 = $preview.width();
          if (w1 > w2) {
            $img.css("width", "100%");
          }
          params = { ind: i, id: previewId, fileId: fileId };
          setTimeout(function () {
            var isValidWidth, isValidHeight;
            isValidWidth = self._isValidSize("Small", "Width", $img, $thumb, fname, params);
            isValidHeight = self._isValidSize("Small", "Height", $img, $thumb, fname, params);
            if (!self.resizeImage) {
              isValidWidth = isValidWidth && self._isValidSize("Large", "Width", $img, $thumb, fname, params);
              isValidHeight = isValidHeight && self._isValidSize("Large", "Height", $img, $thumb, fname, params);
            }
            self._raise("fileimageloaded", [previewId]);
            $thumb.data("exif", exifObj);
            if (isValidWidth && isValidHeight) {
              self.fileManager.addImage(fileId, {
                ind: i,
                img: $img,
                thumb: $thumb,
                pid: previewId,
                typ: ftype,
                siz: fsize,
                validated: false,
                imgData: iData,
                exifObj: exifObj,
              });
              self._validateAllImages();
            }
          }, self.processDelay);
        })
        .one("error", function () {
          self._raise("fileimageloaderror", [previewId]);
        });
    },
    _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 * self.bytesToKB) {
            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 = $h.dataURI2Blob(dataURI);
        self.fileManager.setFile(id, blob);
        self._raise("fileimageresized", evParams);
        counter.val++;
        if (counter.val === numImgs) {
          self._raise("fileimagesresized", [undefined, undefined]);
        }
        if (!(blob instanceof Blob)) {
          throwError(self.msgImageResizeError, params, "fileimageresizeerror");
        }
      } catch (err) {
        counter.val++;
        if (counter.val === numImgs) {
          self._raise("fileimagesresized", [undefined, undefined]);
        }
        msg = self.msgImageResizeException.replace("{errors}", err.message);
        throwError(msg, params, "fileimageresizeexception");
      }
    },
    _showProgress: function () {
      var self = this;
      if (self.$progress && self.$progress.length) {
        self.$progress.show();
      }
    },
    _hideProgress: function () {
      var self = this;
      if (self.$progress && self.$progress.length) {
        self.$progress.hide();
      }
    },
    _initBrowse: function ($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 = $(e.target);
        if (
          !self.$errorContainer.is(":visible") &&
          (!$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)) {
          self.$caption.attr("title", "");
          return;
        }
        title = $("<div>" + content + "</div>").text();
        out = title;
        icon = self._getLayoutTemplate("fileIcon");
      }
      self.$captionContainer.addClass("icon-visible");
      self.$caption.attr("title", title).val(out);
      $h.setHtml(self.$captionIcon, icon);
    },
    _createContainer: function () {
      var self = this,
        attribs = { class: "file-input file-input-new" + (self.rtl ? " kv-rtl" : "") },
        $container = $h.createElement($h.cspBuffer.stash(self._renderMain()));
      $h.cspBuffer.apply($container);
      $container.insertBefore(self.$element).attr(attribs);
      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);
      $h.setHtml($container, self._renderMain());
      self._initBrowse($container);
      self._validateDisabled();
    },
    _validateDisabled: function () {
      var self = this;
      self.$caption.attr({ readonly: self.isDisabled });
    },
    _setTabIndex: function (type, html) {
      var self = this,
        index = self.tabIndexConfig[type];
      return html.setTokens({
        tabIndexConfig: index === undefined || index === null ? "" : 'tabindex="' + index + '"',
      });
    },
    _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" });
      caption = self._setTabIndex("caption", caption);
      return self.mainTemplate.setTokens({
        class: self.mainClass + (!self.showBrowse && self.showCaption ? " no-browse" : ""),
        inputGroupClass: self.inputGroupClass,
        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 "";
      }
      tmplt = self._setTabIndex(type, tmplt);

      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,
        rot = config.showRotate,
        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, rot, zoom, drg, false, false, false);
      } else {
        params.actions = self._renderFileActions(params, false, 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,
      showRot,
      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 (typeof showRot === "function") {
        showRot = showRot(cfg);
      }
      if (!showUpl && !showDwn && !showDel && !showRot && !showZoom && !showDrag) {
        return "";
      }
      var vUrl = url === false ? "" : ' data-url="' + url + '"',
        btnZoom = "",
        btnDrag = "",
        btnRotate = "",
        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 (showRot) {
        btnRotate = self._getLayoutTemplate("actionRotate").setTokens({
          rotateClass: config.rotateClass,
          rotateIcon: config.rotateIcon,
          rotateTitle: config.rotateTitle,
        });
      }
      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,
        rotate: btnRotate,
        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;
      $(document.body).off("focusin.fileinput focusout.fileinput");
      if (self.changeTriggered) {
        self._toggleLoading("hide");
        return;
      }
      self._toggleLoading("show");
      var $el = self.$element,
        isDragDrop = arguments.length > 1,
        isAjaxUpload = self.isAjaxUpload,
        tfiles,
        files = isDragDrop ? arguments[1] : $el[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 = $.extend(true, {}, self._getOutData(null, {}, {}, files), { id: previewId, index: index }),
            p2 = { id: previewId, index: index, file: file, files: files };
          self.isPersistentError = true;
          self._toggleLoading("hide");
          return isAjaxUpload ? self._showFileError(mesg, p1) : self._showError(mesg, p2);
        },
        maxCountCheck = function (n, m, all) {
          var msg = all ? self.msgTotalFilesTooMany : self.msgFilesTooMany;
          msg = msg.replace("{m}", m).replace("{n}", n);
          self.isError = throwError(msg, null, null, null);
          self.$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);
          }
        }
      }
      if (self.autoReplace) {
        self._getThumbs().each(function () {
          var $thumb = $(this);
          if ($thumb.hasClass("file-preview-success") || $thumb.hasClass("file-preview-error")) {
            $thumb.remove();
          }
        });
      }
      self.readFiles(tfiles);
      self._toggleLoading("hide");
    },
    _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();
        self.unlock();
        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 = $thumb.attr("id");
        if (ind === "-1" || ind === -1) {
          return;
        }
        if (!self._getThumbFile($thumb)) {
          $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) / self.bytesToKB,
        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 && $h.compare(name, expDisExt)) ||
        (maxSize && !isNaN(maxSize) && size > maxSize);
      return !skipPreview && (allowedTypes || allowedMimes || allowedExts);
    },
    addToStack: function (file, id) {
      var self = this;
      self.stackIsUpdating = true;
      self.fileManager.add(file, id);
      self._refreshPreview();
      self.stackIsUpdating = false;
    },
    clearFileStack: function () {
      var self = this;
      self.fileManager.clear();
      self._initResumableUpload();
      if (self.enableResumableUpload) {
        if (self.showPause === null) {
          self.showPause = true;
        }
        if (self.showCancel === null) {
          self.showCancel = false;
        }
      } else {
        self.showPause = false;
        if (self.showCancel === null) {
          self.showCancel = true;
        }
      }
      return self.$element;
    },
    getFileStack: function () {
      return this.fileManager.stack;
    },
    getFileList: function () {
      return this.fileManager.list();
    },
    getFilesSize: function () {
      return this.fileManager.getTotalSize();
    },
    getFilesCount: function (includeInitial) {
      var self = this,
        len = self.isAjaxUpload ? self.fileManager.count() : self._inputFileCount();
      if (includeInitial) {
        len += self.previewCache.count(true);
      }
      return self._getFileCount(len);
    },
    _initCapStatus: function (status) {
      var self = this,
        $cap = self.$caption;
      $cap.removeClass("is-valid file-processing");
      if (!status) {
        return;
      }
      if (status === "processing") {
        $cap.addClass("file-processing");
      } else {
        $cap.addClass("is-valid");
      }
    },
    _toggleLoading: function (type) {
      var self = this;
      $h.setHtml(self.$previewStatus, type === "hide" ? "" : self.msgProcessing);
      self.$container.removeClass("file-thumb-loading");
      self._initCapStatus(type === "hide" ? "" : "processing");
      if (type !== "hide") {
        if (self.dropZoneEnabled) {
          self.$container.find(".file-drop-zone ." + self.dropZoneTitleClass).remove();
        }
        self.$container.addClass("file-thumb-loading");
      }
    },
    _initFileSelected: function () {
      var self = this,
        $el = self.$element,
        $body = $(document.body),
        ev = "focusin.fileinput focusout.fileinput";
      if ($body.length) {
        $body
          .off(ev)
          .on("focusout.fileinput", function () {
            self._toggleLoading("show");
          })
          .on("focusin.fileinput", function () {
            setTimeout(function () {
              if (!$el.val()) {
                self._setFileDropZoneTitle();
              }
              $body.off(ev);
              self._toggleLoading("hide");
            }, 2500);
          });
      } else {
        self._toggleLoading("hide");
      }
    },
    readFiles: function (files) {
      this.reader = new FileReader();
      var self = this,
        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) {
          var $thumb,
            p1 = $.extend(true, {}, self._getOutData(null, {}, {}, files), {
              id: previewId,
              index: index,
              fileId: fileId,
            }),
            p2 = { id: previewId, index: index, fileId: fileId, file: file, files: files };
          Object.values(files).forEach((x) => {
            self._previewDefault(x, true);
          });
          $thumb = self._getFrame(previewId, true);
          self._toggleLoading("hide");
          if (self.isAjaxUpload) {
            setTimeout(function () {
              readFile(index + 1);
            }, self.processDelay);
          } else {
            self.unlock();
            numFiles = 0;
          }
          if (self.removeFromPreviewOnError && $thumb.length) {
            $thumb.remove();
          } else {
            self._initFileActions();
            $thumb.find(".kv-file-upload").remove();
          }
          self.isPersistentError = true;
          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,
          fm = self.fileManager;
        if (i >= numFiles) {
          self.unlock();
          if (self.duplicateErrors.length) {
            errors = "<li>" + self.duplicateErrors.join("</li><li>") + "</li>";
            if ($error.find("ul").length === 0) {
              $h.setHtml($error, self.errorCloseButton + "<ul>" + errors + "</ul>");
            } else {
              $error.find("ul").append($h.cspBuffer.stash(errors));
              $h.cspBuffer.apply($error);
            }
            $error.fadeIn(self.fadeDelay);
            self._handler($error.find(".kv-error-close"), "click", function () {
              $error.fadeOut(self.fadeDelay);
            });
            self.duplicateErrors = [];
          }
          if (self.isAjaxUpload) {
            self._raise("filebatchselected", [fm.stack]);
            if (fm.count() === 0 && !self.isError) {
              self.reset();
            }
          } else {
            self._raise("filebatchselected", [files]);
          }
          $container.removeClass("file-thumb-loading");
          self._initCapStatus("valid");
          $status.html("");
          return;
        }
        self.lock(true);
        var file = files[i],
          id,
          previewId,
          fileProcessed,
          fSize = (file && file.size) || 0,
          sizeHuman = self._getSize(fSize, true),
          j,
          msg,
          fnImage = settings.image,
          chk,
          typ,
          typ1,
          typ2,
          caption,
          fileSize = fSize / self.bytesToKB,
          fileExtExpr = "",
          previewData,
          fileCount = 0,
          strTypes = "",
          fileId,
          canLoad,
          fileReaderAborted = false,
          func,
          knownTypes = 0,
          isImage,
          processFileLoaded,
          initFileData;
        initFileData = function (dataSource) {
          dataSource = dataSource || file;
          id = fileId = self._getFileId(file);
          previewId = previewInitId + "-" + id;
          previewData = $h.createObjectURL(dataSource);
          caption = self._getFileName(file, "");
        };
        processFileLoaded = function () {
          var isImageResized = !!fm.loadedImages[id],
            msg = msgProgress.setTokens({
              index: i + 1,
              files: numFiles,
              percent: 50,
              name: caption,
            });
          setTimeout(function () {
            $h.setHtml($status, msg);
            self._updateFileDetails(numFiles);
            if (self.getFilesCount(true) > 0 && self.getFrames(":visible")) {
              self.$dropZone.find("." + self.dropZoneTitleClass).remove();
            }
            readFile(i + 1);
          }, self.processDelay);
          if (self._raise("fileloaded", [file, previewId, id, i, reader]) && self.isAjaxUpload) {
            if (!isImageResized) {
              fm.add(file);
            }
          } else {
            if (isImageResized) {
              fm.removeFile(id);
            }
          }
        };
        if (!file) {
          return;
        }
        initFileData();

        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");
        }
        if ((self.isAjaxUpload && fm.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: sizeHuman });
          if (self.isAjaxUpload) {
            if (!self.stackIsUpdating) {
              self.duplicateErrors.push(msg);
              self.isDuplicateError = true;
              self._raise("fileduplicateerror", [file, fileId, caption, sizeHuman, previewId, i]);
            }
            readFile(i + 1);
            self._updateFileDetails(numFiles);
          } else {
            self._showError(msg, p2);
            self.unlock();
            numFiles = 0;
            self._clearFileInput();
            self.reset();
            self._updateFileDetails(numFiles);
          }
          return;
        }

        if (self.maxMultipleFileSize > 0 && files.length > 1) {
          var captionGroup = [];
          var fileSizeGroup = 0;
          Object.values(files).forEach((file) => {
            fileSizeGroup = fileSizeGroup + file.size / self.bytesToKB;
            captionGroup.push(file.name);
          });

          if (fileSizeGroup > self.maxMultipleFileSize) {
            msg = self.msgMultipleSizeTooLarge.setTokens({
              name: captionGroup,
              size: self._getSize(fileSizeGroup, true),
              maxSize: self._getSize(self.maxMultipleFileSize * self.bytesToKB, true),
            });

            throwError(msg, file, previewId, i, fileId);
            return;
          }
        } else if (self.maxFileSize > 0 && fileSize > self.maxFileSize) {
          msg = self.msgSizeTooLarge.setTokens({
            name: caption,
            size: sizeHuman,
            maxSize: self._getSize(self.maxFileSize * self.bytesToKB, true),
          });
          throwError(msg, file, previewId, i, fileId);
          return;
        }
        if (self.minFileSize !== null && fileSize <= $h.getNum(self.minFileSize)) {
          msg = self.msgSizeTooSmall.setTokens({
            name: caption,
            size: sizeHuman,
            minSize: self._getSize(self.minFileSize * self.bytesToKB, true),
          });
          throwError(msg, file, previewId, i, fileId);
          return;
        }
        if (!$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)) {
          canLoad = self._raise("filebeforeload", [file, i, reader]);
          if (self.isAjaxUpload && canLoad) {
            fm.add(file);
          }
          if (self.showPreview && canLoad) {
            $container.addClass("file-thumb-loading");
            self._initCapStatus("processing");
            self._previewDefault(file);
            self._initFileActions();
          }
          setTimeout(function () {
            if (canLoad) {
              self._updateFileDetails(numFiles);
            }
            readFile(i + 1);
            self._raise("fileloaded", [file, previewId, id, i]);
          }, 10);
          return;
        }
        isImage = fnImage(file.type, caption);
        $h.setHtml($status, msgLoading.replace("{index}", i + 1).replace("{files}", numFiles));
        $container.addClass("file-thumb-loading");
        self._initCapStatus("processing");
        reader.onerror = function (evt) {
          self._errorHandler(evt, caption);
        };
        reader.onload = function (theFile) {
          var hex,
            fileInfo,
            fileData,
            byte,
            bytes = [],
            contents,
            mime,
            processPreview = function (fType, ext) {
              if ($h.isEmpty(fType)) {
                // look for ascii text content
                contents = $h.arrayBuffer2String(reader.result);
                fType = $h.isSvg(contents) ? "image/svg+xml" : $h.getMimeType(hex, contents, file.type);
              }
              fileInfo = { name: caption, type: fType || "" };
              if (ext && typeof File !== "undefined") {
                try {
                  var fName = (fileInfo.filename = caption + "." + ext);
                  fileProcessed = new File([file], fName, { type: fileInfo.type });
                  initFileData(fileProcessed);
                } catch (err) {}
              }
              isImage = fnImage(fType, "");
              if (isImage) {
                var newReader = new FileReader();
                newReader.onerror = function (theFileNew) {
                  self._errorHandler(theFileNew, caption);
                };
                newReader.onload = function (theFileNew) {
                  if (self.isAjaxUpload && !self._raise("filebeforeload", [file, i, reader])) {
                    fileReaderAborted = true;
                    self._resetCaption();
                    reader.abort();
                    $status.html("");
                    $container.removeClass("file-thumb-loading");
                    self._initCapStatus("valid");
                    self.enable();
                    return;
                  }
                  self._previewFile(i, file, theFileNew, previewData, fileInfo);
                  self._initFileActions();
                  processFileLoaded();
                };
                newReader.readAsDataURL(file);
                return;
              }
              if (self.isAjaxUpload && !self._raise("filebeforeload", [file, i, reader])) {
                fileReaderAborted = true;
                self._resetCaption();
                reader.abort();
                $status.html("");
                $container.removeClass("file-thumb-loading");
                self._initCapStatus("valid");
                self.enable();
                return;
              }
              self._previewFile(i, file, theFile, previewData, fileInfo);
              self._initFileActions();
              processFileLoaded();
            };
          mime = file.type;
          fileInfo = { name: caption, type: mime };
          $.each(settings, function (k, f) {
            if (k !== "object" && k !== "other" && typeof f === "function" && f(mime, caption)) {
              knownTypes++;
            }
          });
          if (typeof FileTypeParser !== "undefined") {
            fileData = new Uint8Array(theFile.target.result);
            new FileTypeParser().parse(fileData).then(function (result) {
              processPreview((result && result.mime) || mime, (result && result.ext) || "");
            });
          } else {
            if (knownTypes === 0) {
              // auto detect mime types from content if no known file types detected
              fileData = new Uint8Array(theFile.target.result);
              for (j = 0; j < fileData.length; j++) {
                byte = fileData[j].toString(16);
                bytes.push(byte);
              }
              hex = bytes.join("").toLowerCase().substring(0, 8);
              mime = $h.getMimeType(hex, "", "");
            }
            processPreview(mime);
          }
        };
        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 () {
              if (!fileReaderAborted) {
                $h.setHtml($status, msg);
              }
            }, self.processDelay);
          }
        };
        reader.readAsArrayBuffer(file);
      };

      readFile(0);
      self._updateFileDetails(numFiles);
    },
    lock: function (selectMode) {
      var self = this,
        $container = self.$container;
      self._resetErrors();
      self.disable();
      if (!selectMode && self.showCancel) {
        $container.find(".fileinput-cancel").show();
      }
      if (!selectMode && self.showPause) {
        $container.find(".fileinput-pause").show();
      }
      self._initCapStatus("processing");
      self._raise("filelock", [self.fileManager.stack, self._getExtraData()]);
      return self.$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) {
        $container.find(".fileinput-pause").hide();
      }
      if (reset) {
        self._resetFileStack();
      }
      self._initCapStatus();
      self._raise("fileunlock", [self.fileManager.stack, self._getExtraData()]);
      return self.$element;
    },
    resume: function () {
      var self = this,
        fm = self.fileManager,
        flag = false,
        rm = self.resumableManager;
      fm.bpsLog = [];
      fm.bps = 0;
      if (!self.enableResumableUpload) {
        return self.$element;
      }
      if (self.paused) {
        self._toggleResumableProgress(self.progressPauseTemplate, self.msgUploadResume);
      } else {
        flag = true;
      }
      self.paused = false;
      if (flag) {
        self._toggleResumableProgress(self.progressInfoTemplate, self.msgUploadBegin);
      }
      setTimeout(function () {
        rm.upload();
      }, self.processDelay);
      return self.$element;
    },
    paste: function (e) {
      var self = this,
        dt = e.clipboardData || e.originalEvent.clipboardData;
      self._addFilesFromSystem(e, dt, "filePaste");
      return self.$element;
    },
    pause: function () {
      var self = this,
        rm = self.resumableManager,
        xhr = self.ajaxRequests,
        len = xhr.length,
        i,
        pct = rm.getProgress(),
        actions = self.fileActionSettings,
        tm = self.taskManager,
        pool = tm.getPool(rm.id);
      if (!self.enableResumableUpload) {
        return self.$element;
      } else {
        if (pool) {
          pool.cancel();
        }
      }
      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),
            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, $thumb.find(".file-thumb-progress"), pct + "%", stats);
          }
          if (!self._getThumbFile($thumb)) {
            $thumb.find(".kv-file-remove").removeClass("disabled").removeAttr("disabled");
          }
        });
      }
      self._setProgress(101, self.$progress, self.msgPaused);
      return self.$element;
    },
    cancel: function () {
      var self = this,
        xhr = self.ajaxRequests,
        rm = self.resumableManager,
        tm = self.taskManager,
        pool = rm ? tm.getPool(rm.id) : undefined,
        len = xhr.length,
        i;
      if (self.enableResumableUpload && pool) {
        pool.cancel().done(function () {
          self._setProgressCancelled();
        });
        rm.reset();
        self._raise("fileuploadcancelled", [self.fileManager, rm]);
      } else {
        if (self.ajaxPool) {
          self.ajaxPool.cancel();
        }
        self._raise("fileuploadcancelled", [self.fileManager]);
      }
      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),
          $prog = $thumb.find(".file-thumb-progress");
        $thumb.removeClass("file-uploading");
        self._setProgress(0, $prog);
        $prog.hide();
        if (!self._getThumbFile($thumb)) {
          $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.clearInput = true;
      self.$btnUpload.removeAttr("disabled");
      self
        ._getThumbs()
        .find("video,audio,img")
        .each(function () {
          $h.cleanMemory($(this));
        });
      self._clearFileInput();
      self._resetUpload();
      self.clearFileStack();
      self.isDuplicateError = false;
      self.isPersistentError = false;
      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.$container.removeClass("file-input-new");
      }
      self.clearFileStack();
      self._setFileDropZoneTitle();
      return self.$element;
    },
    disable: function () {
      var self = this,
        $container = self.$container;
      self.isDisabled = true;
      self._raise("filedisabled");
      self.$element.attr("disabled", "disabled");
      $container.addClass("is-locked");
      $h.addCss($container.find(".btn-file"), "disabled");
      $container.find(".kv-fileinput-caption").addClass("file-caption-disabled");
      $container.find(".fileinput-remove, .fileinput-upload, .file-preview-frame button").attr("disabled", true);
      self._initDragDrop();
      return self.$element;
    },
    enable: function () {
      var self = this,
        $container = self.$container;
      self.isDisabled = false;
      self._raise("fileenabled");
      self.$element.removeAttr("disabled");
      $container.removeClass("is-locked");
      $container.find(".kv-fileinput-caption").removeClass("file-caption-disabled");
      $container.find(".fileinput-remove, .fileinput-upload, .file-preview-frame button").removeAttr("disabled");
      $container.find(".btn-file").removeClass("disabled");
      self._initDragDrop();
      return self.$element;
    },
    upload: function () {
      var self = this,
        fm = self.fileManager,
        totLen = fm.count(),
        i,
        outData,
        tm = self.taskManager,
        hasExtraData = !$.isEmptyObject(self._getExtraData());
      fm.bpsLog = [];
      fm.bps = 0;
      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.uploadInitiated = true;
      self._showProgress();
      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);
        if (!self._checkBatchPreupload(outData)) {
          return;
        }
        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($h.SORT_CSS);
        self._initSortable();
      }
      self._setProgress(2);
      self.hasInitData = false;
      if (self.uploadAsync) {
        i = 0;
        var pool = (self.ajaxPool = tm.addPool($h.uniqId()));
        $.each(self.getFileStack(), function (id) {
          pool.addTask(id + i, function (deferrer) {
            self._uploadSingle(i, id, true, deferrer);
          });
          i++;
        });

        pool
          .run(self.maxAjaxThreads)
          .done(function () {
            self._log("Async upload batch completed successfully.");
            self._raise("filebatchuploadsuccess", [fm.stack, self._getExtraData()]);
          })
          .fail(function () {
            self._log("Async upload batch completed with errors.");
            self._raise("filebatchuploaderror", [fm.stack, self._getExtraData()]);
          });
        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,
        $frame = self._getFrame(frameId);
      self._showModal($frame);
    },
    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 options = {}, optObj = {};
      if (typeof option === "object") {
        options = $.extend(true, {}, $.fn.fileinput.defaults, option);
        optObj = option;
      } 
      var self = $(this),
        data = self.data("fileinput"),
        theme = options.theme || self.data("theme") || $.fn.fileinput.defaults.theme,
        l = {},
        t = {},
        lang = options.language || self.data("language") || $.fn.fileinput.defaults.language || "en",
        opt;
      if (!data) {
        if (theme) {
          t = $.fn.fileinputThemes[theme] || {};
        }
        if (lang !== "en") {
          if (!$h.isEmpty($.fn.fileinputLocales[lang])) {
            l = $.fn.fileinputLocales[lang];
          } else {
            var langParts = lang.split('-', 2);
            if (langParts.length > 1 && !$h.isEmpty($.fn.fileinputLocales[langParts[0]])) {
              l = $.fn.fileinputLocales[langParts[0]];
            }
          }
        }
        opt = $.extend(true, {}, $.fn.fileinput.defaults, t, $.fn.fileinputLocales.en, l, optObj, 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;
    }
  };

  var IFRAME_ATTRIBS = 'class="kv-preview-data file-preview-pdf" src="{renderer}?file={data}" {style}',
    defBtnCss1 = "btn btn-sm btn-kv " + $h.defaultButtonCss(),
    defBtnCss2 = "btn " + $h.defaultButtonCss();

  $.fn.fileinput.defaults = {
    language: "en",
    bytesToKB: 1024,
    showCaption: true,
    showBrowse: true,
    showPreview: true,
    showRemove: true,
    showUpload: true,
    showUploadStats: true,
    showCancel: null,
    showPause: null,
    showClose: true,
    showUploadedThumbs: true,
    showConsoleLogs: false,
    browseOnZoneClick: false,
    autoReplace: false,
    showDescriptionClose: true,
    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,
    showExifErrorLog: false,
    required: false,
    rtl: false,
    hideThumbnailContent: false,
    encodeUrl: true,
    focusCaptionOnBrowse: true,
    focusCaptionOnClear: true,
    generateFileId: null,
    previewClass: "",
    captionClass: "",
    frameClass: "krajee-default",
    mainClass: "",
    inputGroupClass: "",
    mainTemplate: null,
    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 = $h.createDiv();
      $h.setHtml($container, content);
      $container.find("input,textarea,select,datalist,form,.file-thumbnail-footer").remove();
      return $container.html();
    },
    previewZoomButtonIcons: {
      prev: '<i class="bi-chevron-left"></i>',
      next: '<i class="bi-chevron-right"></i>',
      rotate: '<i class="bi-arrow-clockwise"></i>',
      toggleheader: '<i class="bi-arrows-expand"></i>',
      fullscreen: '<i class="bi-arrows-fullscreen"></i>',
      borderless: '<i class="bi-arrows-angle-expand"></i>',
      close: '<i class="bi-x-lg"></i>',
    },
    previewZoomButtonClasses: {
      prev: "btn btn-default btn-outline-secondary btn-navigate",
      next: "btn btn-default btn-outline-secondary btn-navigate",
      rotate: defBtnCss1,
      toggleheader: defBtnCss1,
      fullscreen: defBtnCss1,
      borderless: defBtnCss1,
      close: defBtnCss1,
    },
    previewTemplates: {},
    previewContentTemplates: {},
    preferIconicPreview: false,
    preferIconicZoomPreview: false,
    alwaysPreviewFileExtensions: [],
    rotatableFileExtensions: ["jpg", "jpeg", "png", "gif"],
    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="bi-file-earmark-fill"></i>',
    previewFileIconClass: "file-other-icon",
    previewFileIconSettings: {},
    previewFileExtSettings: {},
    buttonLabelClass: "hidden-xs",
    browseIcon: '<i class="bi-folder2-open"></i> ',
    browseClass: "btn btn-primary",
    removeIcon: '<i class="bi-trash"></i>',
    removeClass: defBtnCss2,
    cancelIcon: '<i class="bi-slash-circle"></i>',
    cancelClass: defBtnCss2,
    pauseIcon: '<i class="bi-pause-fill"></i>',
    pauseClass: defBtnCss2,
    uploadIcon: '<i class="bi-upload"></i>',
    uploadClass: defBtnCss2,
    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,
    fadeDelay: 800,
    processDelay: 100,
    bitrateUpdateDelay: 500,
    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: 2048, // in KB
      maxThreads: 4,
      maxRetries: 3,
      showErrorLog: true,
      retainErrorHistory: false, // when set to true, display complete error history always unless user explicitly resets upload
      skipErrorsAndProceed: false, // when set to true, files with errors will be skipped and upload will continue with other files
    },
    uploadExtraData: {},
    zoomModalHeight: 485, // 5px more than the default preview content heights set for text, html, pdf etc.
    minImageWidth: null,
    minImageHeight: null,
    maxImageWidth: null,
    maxImageHeight: null,
    resizeImage: false,
    resizePreference: "width",
    resizeQuality: 0.92,
    resizeDefaultImageType: "image/jpeg",
    resizeIfSizeMoreThan: 0, // in KB
    minFileSize: -1,
    maxFileSize: 0,
    maxMultipleFileSize: 0,
    maxFilePreviewSize: 25600, // 25 MB
    minFileCount: 0,
    maxFileCount: 0,
    maxTotalFileCount: 0,
    validateInitialCount: false,
    msgValidationErrorClass: "text-danger",
    msgValidationErrorIcon: '<i class="bi-exclamation-circle-fill"></i> ',
    msgErrorClass: "file-error-message",
    progressThumbClass: "progress-bar progress-bar-striped active progress-bar-animated",
    progressClass: "progress-bar bg-success progress-bar-success progress-bar-striped active progress-bar-animated",
    progressInfoClass: "progress-bar bg-info progress-bar-info progress-bar-striped active progress-bar-animated",
    progressCompleteClass: "progress-bar bg-success progress-bar-success",
    progressPauseClass:
      "progress-bar bg-primary progress-bar-primary progress-bar-striped active progress-bar-animated",
    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: undefined,
    slugCallback: null,
    dropZoneEnabled: true,
    dropZoneTitleClass: "file-drop-zone-title",
    fileActionSettings: {},
    otherActionButtons: "",
    textEncoding: "UTF-8",
    preProcessUpload: null,
    ajaxSettings: {},
    ajaxDeleteSettings: {},
    showAjaxErrorDetails: true,
    mergeAjaxCallbacks: false,
    mergeAjaxDeleteCallbacks: false,
    retryErrorUploads: true,
    reversePreviewOrder: false,
    usePdfRenderer: function () {
      var isIE11 = !!window.MSInputMethodContext && !!document.documentMode;
      return !!navigator.userAgent.match(/(iPod|iPhone|iPad|Android)/i) || isIE11;
    },
    pdfRendererUrl: "",
    pdfRendererTemplate: "<iframe " + IFRAME_ATTRIBS + "></iframe>",
    tabIndexConfig: {
      browse: 500,
      remove: 500,
      upload: 500,
      cancel: null,
      pause: null,
      modal: -1,
    },
  };

  // noinspection HtmlUnknownAttribute
  $.fn.fileinputLocales.en = {
    sizeUnits: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"],
    bitRateUnits: ["B/s", "KB/s", "MB/s", "GB/s", "TB/s", "PB/s", "EB/s", "ZB/s", "YB/s"],
    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}</b>) is too small and must be larger than <b>{minSize}</b>.',
    msgSizeTooLarge: 'File "{name}" (<b>{size}</b>) exceeds maximum allowed upload size of <b>{maxSize}</b>.',
    msgMultipleSizeTooLarge: 'Files "{name}" (<b>{size}</b>) exceeds maximum allowed upload size of <b>{maxSize}</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 &hellip;",
    msgUploadBegin: "Initializing &hellip;",
    msgUploadEnd: "Done",
    msgUploadResume: "Resuming upload &hellip;",
    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",
    msgProcessing: "Processing ...",
    msgFoldersNotAllowed: "Drag & drop files only! {n} folder(s) dropped were skipped.",
    msgImageWidthSmall:
      'Width of image file "{name}" must be at least <b>{size} px</b> (detected <b>{dimension} px</b>).',
    msgImageHeightSmall:
      'Height of image file "{name}" must be at least <b>{size} px</b> (detected <b>{dimension} px</b>).',
    msgImageWidthLarge: 'Width of image file "{name}" cannot exceed <b>{size} px</b> (detected <b>{dimension} px</b>).',
    msgImageHeightLarge:
      'Height of image file "{name}" cannot exceed <b>{size} px</b> (detected <b>{dimension} px</b>).',
    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}" 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",
      rotate: "Rotate 90 deg. clockwise",
      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();
    }
  });
});