text: /*!
   * bootstrap-fileinput v4.4.4
   * http://plugins.krajee.com/file-input
   *
   * Author: Kartik Visweswaran
   * Copyright: 2014 - 2017, Kartik Visweswaran, Krajee.com
   *
   * Licensed under the BSD 3-Clause
   * https://github.com/kartik-v/bootstrap-fileinput/blob/master/LICENSE.md
   */
  (function (factory) {
      "use strict";
      //noinspection JSUnresolvedVariable
      if (typeof define === 'function' && define.amd) { // jshint ignore:line
          // AMD. Register as an anonymous module.
          define(['jquery'], factory); // jshint ignore:line
      } else { // noinspection JSUnresolvedVariable
          if (typeof module === 'object' && module.exports) { // jshint ignore:line
              // Node/CommonJS
              // noinspection JSUnresolvedVariable
              module.exports = factory(require('jquery')); // jshint ignore:line
          } else {
              // Browser globals
              factory(window.jQuery);
          }
      }
  }(function ($) {
      "use strict";
  
      $.fn.fileinputLocales = {};
      $.fn.fileinputThemes = {};
  
      String.prototype.setTokens = function (replacePairs) {
          var str = this.toString(), key, re;
          for (key in replacePairs) {
              if (replacePairs.hasOwnProperty(key)) {
                  re = new RegExp("\{" + key + "\}", "g");
                  str = str.replace(re, replacePairs[key]);
              }
          }
          return str;
      };
  
      var $h, FileInput;
  
      // fileinput helper object for all global variables and internal helper methods
      //noinspection JSUnresolvedVariable
      $h = {
          FRAMES: '.kv-preview-thumb',
          SORT_CSS: 'file-sortable',
          OBJECT_PARAMS: '<param name="controller" value="true" />\n' +
          '<param name="allowFullScreen" value="true" />\n' +
          '<param name="allowScriptAccess" value="always" />\n' +
          '<param name="autoPlay" value="false" />\n' +
          '<param name="autoStart" value="false" />\n' +
          '<param name="quality" value="high" />\n',
          DEFAULT_PREVIEW: '<div class="file-preview-other">\n' +
          '<span class="{previewFileIconClass}">{previewFileIcon}</span>\n' +
          '</div>',
          MODAL_ID: 'kvFileinputModal',
          MODAL_EVENTS: ['show', 'shown', 'hide', 'hidden', 'loaded'],
          objUrl: window.URL || window.webkitURL,
          compare: function (input, str, exact) {
              return input !== undefined && (exact ? input === str : input.match(str));
          },
          isIE: function (ver) {
              // check for IE versions < 11
              if (navigator.appName !== 'Microsoft Internet Explorer') {
                  return false;
              }
              if (ver === 10) {
                  return new RegExp('msie\\s' + ver, 'i').test(navigator.userAgent);
              }
              var div = document.createElement("div"), status;
              div.innerHTML = "<!--[if IE " + ver + "]> <i></i> <![endif]-->";
              status = div.getElementsByTagName("i").length;
              document.body.appendChild(div);
              div.parentNode.removeChild(div);
              return status;
          },
          initModal: function ($modal) {
              var $body = $('body');
              if ($body.length) {
                  $modal.appendTo($body);
              }
          },
          isEmpty: function (value, trim) {
              return value === undefined || value === null || value.length === 0 || (trim && $.trim(value) === '');
          },
          isArray: function (a) {
              return Array.isArray(a) || Object.prototype.toString.call(a) === '[object Array]';
          },
          ifSet: function (needle, haystack, def) {
              def = def || '';
              return (haystack && typeof haystack === 'object' && needle in haystack) ? haystack[needle] : def;
          },
          cleanArray: function (arr) {
              if (!(arr instanceof Array)) {
                  arr = [];
              }
              return arr.filter(function (e) {
                  return (e !== undefined && e !== null);
              });
          },
          spliceArray: function (arr, index) {
              var i, j = 0, out = [];
              if (!(arr instanceof Array)) {
                  return [];
              }
              for (i = 0; i < arr.length; i++) {
                  if (i !== index) {
                      out[j] = arr[i];
                      j++;
                  }
              }
              return out;
          },
          getNum: function (num, def) {
              def = def || 0;
              if (typeof num === "number") {
                  return num;
              }
              if (typeof num === "string") {
                  num = parseFloat(num);
              }
              return isNaN(num) ? def : num;
          },
          hasFileAPISupport: function () {
              return !!(window.File && window.FileReader);
          },
          hasDragDropSupport: function () {
              var div = document.createElement('div');
              /** @namespace div.draggable */
              /** @namespace div.ondragstart */
              /** @namespace div.ondrop */
              return !$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;
              }
          },
          dataURI2Blob: function (dataURI) {
              //noinspection JSUnresolvedVariable
              var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder ||
                      window.MSBlobBuilder, canBlob = $h.hasBlobSupport(), byteStr, arrayBuffer, intArray, i, mimeStr, bb,
                  canProceed = (canBlob || BlobBuilder) && window.atob && window.ArrayBuffer && window.Uint8Array;
              if (!canProceed) {
                  return null;
              }
              if (dataURI.split(',')[0].indexOf('base64') >= 0) {
                  byteStr = atob(dataURI.split(',')[1]);
              } else {
                  byteStr = decodeURIComponent(dataURI.split(',')[1]);
              }
              arrayBuffer = new ArrayBuffer(byteStr.length);
              intArray = new Uint8Array(arrayBuffer);
              for (i = 0; i < byteStr.length; i += 1) {
                  intArray[i] = byteStr.charCodeAt(i);
              }
              mimeStr = dataURI.split(',')[0].split(':')[1].split(';')[0];
              if (canBlob) {
                  return new Blob([$h.hasArrayBufferViewSupport() ? intArray : arrayBuffer], {type: mimeStr});
              }
              bb = new BlobBuilder();
              bb.append(arrayBuffer);
              return bb.getBlob(mimeStr);
          },
          addCss: function ($el, css) {
              $el.removeClass(css).addClass(css);
          },
          getElement: function (options, param, value) {
              return ($h.isEmpty(options) || $h.isEmpty(options[param])) ? value : $(options[param]);
          },
          uniqId: function () {
              return Math.round(new Date().getTime()) + '_' + Math.round(Math.random() * 100);
          },
          htmlEncode: function (str) {
              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');
              /** @namespace $h.objUrl.revokeObjectURL */
              $h.objUrl.revokeObjectURL(data);
          },
          findFileName: function (filePath) {
              var sepIndex = filePath.lastIndexOf('/');
              if (sepIndex === -1) {
                  sepIndex = filePath.lastIndexOf('\\');
              }
              return filePath.split(filePath.substring(sepIndex, sepIndex + 1)).pop();
          },
          checkFullScreen: function () {
              //noinspection JSUnresolvedVariable
              return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement ||
                  document.msFullscreenElement;
          },
          toggleFullScreen: function (maximize) {
              var doc = document, de = doc.documentElement;
              if (de && maximize && !$h.checkFullScreen()) {
                  /** @namespace document.requestFullscreen */
                  /** @namespace document.msRequestFullscreen */
                  /** @namespace document.mozRequestFullScreen */
                  /** @namespace document.webkitRequestFullscreen */
                  /** @namespace Element.ALLOW_KEYBOARD_INPUT */
                  if (de.requestFullscreen) {
                      de.requestFullscreen();
                  } else if (de.msRequestFullscreen) {
                      de.msRequestFullscreen();
                  } else if (de.mozRequestFullScreen) {
                      de.mozRequestFullScreen();
                  } else if (de.webkitRequestFullscreen) {
                      de.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
                  }
              } else {
                  /** @namespace document.exitFullscreen */
                  /** @namespace document.msExitFullscreen */
                  /** @namespace document.mozCancelFullScreen */
                  /** @namespace document.webkitExitFullscreen */
                  if (doc.exitFullscreen) {
                      doc.exitFullscreen();
                  } else if (doc.msExitFullscreen) {
                      doc.msExitFullscreen();
                  } else if (doc.mozCancelFullScreen) {
                      doc.mozCancelFullScreen();
                  } else if (doc.webkitExitFullscreen) {
                      doc.webkitExitFullscreen();
                  }
              }
          },
          moveArray: function (arr, oldIndex, newIndex) {
              if (newIndex >= arr.length) {
                  var k = newIndex - arr.length;
                  while ((k--) + 1) {
                      arr.push(undefined);
                  }
              }
              arr.splice(newIndex, 0, arr.splice(oldIndex, 1)[0]);
              return arr;
          },
          cleanZoomCache: function ($el) {
              var $cache = $el.closest('.kv-zoom-cache-theme');
              if (!$cache.length) {
                  $cache = $el.closest('.kv-zoom-cache');
              }
              $cache.remove();
          },
          setOrientation: function (buffer, callback) {
              var scanner = new DataView(buffer), idx = 0, value = 1, // Non-rotated is the default
                  maxBytes, uInt16, exifLength;
              if (scanner.getUint16(idx) !== 0xFFD8 || buffer.length < 2) { // not a proper JPEG
                  if (callback) {
                      callback();
                  }
                  return;
              }
              idx += 2;
              maxBytes = scanner.byteLength;
              while (idx < maxBytes - 2) {
                  uInt16 = scanner.getUint16(idx);
                  idx += 2;
                  switch (uInt16) {
                      case 0xFFE1: // Start of EXIF
                          exifLength = scanner.getUint16(idx);
                          maxBytes = exifLength - idx;
                          idx += 2;
                          break;
                      case 0x0112: // Orientation tag
                          value = scanner.getUint16(idx + 6, false);
                          maxBytes = 0; // Stop scanning
                          break;
                  }
              }
              if (callback) {
                  callback(value);
              }
          },
          validateOrientation: function (file, callback) {
              if (!window.FileReader || !window.DataView) {
                  return; // skip orientation if pre-requisite libraries not supported by browser
              }
              var reader = new FileReader(), buffer;
              reader.onloadend = function () {
                  buffer = reader.result;
                  $h.setOrientation(buffer, callback);
              };
              reader.readAsArrayBuffer(file);
          },
          adjustOrientedImage: function ($img, isZoom) {
              var offsetContTop, offsetTop, newTop;
              if (!$img.hasClass('is-portrait-gt4')) {
                  return;
              }
              if (isZoom) {
                  $img.css({width: $img.parent().height()});
                  return;
              } else {
                  $img.css({height: 'auto', width: $img.height()});
              }
              offsetContTop = $img.parent().offset().top;
              offsetTop = $img.offset().top;
              newTop = offsetContTop - offsetTop;
              $img.css('margin-top', newTop);
          }
      };
      FileInput = function (element, options) {
          var self = this;
          self.$element = $(element);
          self.$parent = self.$element.parent();
          if (!self._validate()) {
              return;
          }
          self.isPreviewable = $h.hasFileAPISupport();
          self.isIE9 = $h.isIE(9);
          self.isIE10 = $h.isIE(10);
          if (self.isPreviewable || self.isIE9) {
              self._init(options);
              self._listen();
          }
          self.$element.removeClass('file-loading');
      };
      //noinspection JSUnusedGlobalSymbols
      FileInput.prototype = {
          constructor: FileInput,
          _cleanup: function () {
              var self = this;
              self.reader = null;
              self.formdata = {};
              self.uploadCount = 0;
              self.uploadStatus = {};
              self.uploadLog = [];
              self.uploadAsyncCount = 0;
              self.loadedImages = [];
              self.totalImagesCount = 0;
              self.ajaxRequests = [];
              self.clearStack();
              self.fileInputCleared = false;
              self.fileBatchCompleted = true;
              if (!self.isPreviewable) {
                  self.showPreview = false;
              }
              self.isError = false;
              self.ajaxAborted = false;
              self.cancelling = false;
          },
          _init: function (options, refreshMode) {
              var self = this, $el = self.$element, $cont, t, tmp;
              self.options = options;
              $.each(options, function (key, value) {
                  switch (key) {
                      case 'minFileCount':
                      case 'maxFileCount':
                      case 'minFileSize':
                      case 'maxFileSize':
                      case 'maxFilePreviewSize':
                      case 'resizeImageQuality':
                      case 'resizeIfSizeMoreThan':
                      case 'progressUploadThreshold':
                      case 'initialPreviewCount':
                      case 'zoomModalHeight':
                      case 'minImageHeight':
                      case 'maxImageHeight':
                      case 'minImageWidth':
                      case 'maxImageWidth':
                          self[key] = $h.getNum(value);
                          break;
                      default:
                          self[key] = value;
                          break;
                  }
              });
              if (self.rtl) { // swap buttons for rtl
                  tmp = self.previewZoomButtonIcons.prev;
                  self.previewZoomButtonIcons.prev = self.previewZoomButtonIcons.next;
                  self.previewZoomButtonIcons.next = tmp;
              }
              if (!refreshMode) {
                  self._cleanup();
              }
              self.$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.progressCompleteTemplate = t.replace('{class}', self.progressCompleteClass);
              self.progressErrorTemplate = t.replace('{class}', self.progressErrorClass);
              self.dropZoneEnabled = $h.hasDragDropSupport() && self.dropZoneEnabled;
              self.isDisabled = $el.attr('disabled') || $el.attr('readonly');
              if (self.isDisabled) {
                  $el.attr('disabled', true);
              }
              self.isAjaxUpload = $h.hasFileUploadSupport() && !$h.isEmpty(self.uploadUrl);
              self.isClickable = self.browseOnZoneClick && self.showPreview &&
                  (self.isAjaxUpload && self.dropZoneEnabled || !$h.isEmpty(self.defaultPreviewContent));
              self.slug = typeof options.slugCallback === "function" ? options.slugCallback : self._slugDefault;
              self.mainTemplate = self.showCaption ? self._getLayoutTemplate('main1') : self._getLayoutTemplate('main2');
              self.captionTemplate = self._getLayoutTemplate('caption');
              self.previewGenericTemplate = self._getPreviewTemplate('generic');
              if (!self.imageCanvas && self.resizeImage && (self.maxImageWidth || self.maxImageHeight)) {
                  self.imageCanvas = document.createElement('canvas');
                  self.imageCanvasContext = self.imageCanvas.getContext('2d');
              }
              if ($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', $cont.find('.file-caption-name'));
              self.$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'));
              if (!$h.isEmpty(self.msgErrorClass)) {
                  $h.addCss(self.$errorContainer, self.msgErrorClass);
              }
              if (!refreshMode) {
                  self.$errorContainer.hide();
                  self.previewInitId = "preview-" + $h.uniqId();
                  self._initPreviewCache();
                  self._initPreview(true);
                  self._initPreviewActions();
                  self._setFileDropZoneTitle();
                  if (self.$parent.hasClass('file-loading')) {
                      self.$container.insertBefore(self.$parent);
                      self.$parent.remove();
                  }
              }
              if ($el.attr('disabled')) {
                  self.disable();
              }
              self._initZoom();
              if (self.hideThumbnailContent) {
                  $h.addCss(self.$preview, 'hide-content');
              }
          },
          _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, tVideo, tAudio, tFlash, tObject, tPdf, tOther, tZoomCache, vDefaultDim;
              tMain1 = '{preview}\n' +
                  '<div class="kv-upload-progress kv-hidden"></div><div class="clearfix"></div>\n' +
                  '<div class="input-group {class}">\n' +
                  '   {caption}\n' +
                  '   <div class="input-group-btn">\n' +
                  '       {remove}\n' +
                  '       {cancel}\n' +
                  '       {upload}\n' +
                  '       {browse}\n' +
                  '   </div>\n' +
                  '</div>';
              tMain2 = '{preview}\n<div class="kv-upload-progress kv-hidden"></div>\n<div class="clearfix"></div>\n{remove}\n{cancel}\n{upload}\n{browse}\n';
              tPreview = '<div class="file-preview {class}">\n' +
                  '    {close}' +
                  '    <div class="{dropClass}">\n' +
                  '    <div class="file-preview-thumbnails">\n' +
                  '    </div>\n' +
                  '    <div class="clearfix"></div>' +
                  '    <div class="file-preview-status text-center text-success"></div>\n' +
                  '    <div class="kv-fileinput-error"></div>\n' +
                  '    </div>\n' +
                  '</div>';
              tClose = '<button type="button" class="close fileinput-remove">&times;</button>\n';
              tFileIcon = '<i class="glyphicon glyphicon-file kv-caption-icon"></i>';
              tCaption = '<div tabindex="500" class="form-control file-caption {class}">\n' +
                  '   <div class="file-caption-name"></div>\n' +
                  '</div>\n';
              //noinspection HtmlUnknownAttribute
              tBtnDefault = '<button type="{type}" tabindex="500" title="{title}" class="{css}" ' +
                  '{status}>{icon} {label}</button>';
              //noinspection HtmlUnknownAttribute
              tBtnLink = '<a href="{href}" tabindex="500" title="{title}" class="{css}" {status}>{icon} {label}</a>';
              //noinspection HtmlUnknownAttribute
              tBtnBrowse = '<div tabindex="500" class="{css}" {status}>{icon} {label}</div>';
              tModalMain = '<div id="' + $h.MODAL_ID + '" class="file-zoom-dialog modal fade" ' +
                  'tabindex="-1" aria-labelledby="' + $h.MODAL_ID + 'Label"></div>';
              tModal = '<div class="modal-dialog modal-lg{rtl}" role="document">\n' +
                  '  <div class="modal-content">\n' +
                  '    <div class="modal-header">\n' +
                  '      <h5 class="modal-title">{heading}</h5>\n' +
                  '      <span class="kv-zoom-title"></span>\n' +
                  '      <div class="kv-zoom-actions">{toggleheader}{fullscreen}{borderless}{close}</div>\n' +
                  '    </div>\n' +
                  '    <div class="modal-body">\n' +
                  '      <div class="floating-buttons"></div>\n' +
                  '      <div class="kv-zoom-body file-zoom-content {zoomFrameClass}"></div>\n' + '{prev} {next}\n' +
                  '    </div>\n' +
                  '  </div>\n' +
                  '</div>\n';
              tProgress = '<div class="progress">\n' +
                  '    <div class="{class}" role="progressbar"' +
                  ' aria-valuenow="{percent}" aria-valuemin="0" aria-valuemax="100" style="width:{percent}%;">\n' +
                  '        {status}\n' +
                  '     </div>\n' +
                  '</div>';
              tSize = ' <samp>({sizeText})</samp>';
              tFooter = '<div class="file-thumbnail-footer">\n' +
                  '    <div class="file-footer-caption" title="{caption}">\n' +
                  '        <div class="file-caption-info">{caption}</div>\n' +
                  '        <div class="file-size-info">{size}</div>\n' +
                  '    </div>\n' +
                  '    {progress}\n{indicator}\n{actions}\n' +
                  '</div>';
              tActions = '<div class="file-actions">\n' +
                  '    <div class="file-footer-buttons">\n' +
                  '        {download} {upload} {delete} {zoom} {other}' +
                  '    </div>\n' +
                  '</div>\n' +
                  '{drag}\n' +
                  '<div class="clearfix"></div>';
              //noinspection HtmlUnknownAttribute
              tActionDelete = '<button type="button" class="kv-file-remove {removeClass}" ' +
                  'title="{removeTitle}" {dataUrl}{dataKey}>{removeIcon}</button>\n';
              tActionUpload = '<button type="button" class="kv-file-upload {uploadClass}" title="{uploadTitle}">' +
                  '{uploadIcon}</button>';
              tActionDownload = '<a href="{downloadUrl}" class="{downloadClass}" title="{downloadTitle}" ' +
                  'download="{caption}">{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-template="{template}"';
              tTagBef1 = tTagBef + '><div class="kv-file-content">\n';
              tTagBef2 = tTagBef + ' title="{caption}"><div class="kv-file-content">\n';
              tTagAft = '</div>{footer}\n</div>\n';
              tGeneric = '{content}\n';
              tHtml = '<div class="kv-preview-data file-preview-html" title="{caption}" {style}>{data}</div>\n';
              tImage = '<img src="{data}" class="file-preview-image kv-preview-data" title="{caption}" ' +
                  'alt="{caption}" {style}>\n';
              tText = '<textarea class="kv-preview-data file-preview-text" title="{caption}" readonly {style}>' +
                  '{data}</textarea {style}>\n';
              tVideo = '<video class="kv-preview-data file-preview-video" controls {style}>\n' +
                  '<source src="{data}" type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</video>\n';
              tAudio = '<audio class="kv-preview-data file-preview-audio" controls {style}>\n<source src="{data}" ' +
                  'type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</audio>\n';
              tFlash = '<object class="kv-preview-data file-preview-flash file-object" type="application/x-shockwave-flash" ' +
                  'data="{data}" {style}>\n' + $h.OBJECT_PARAMS + ' ' + $h.DEFAULT_PREVIEW +
                  '\n</object>\n';
              tObject = '<object class="kv-preview-data file-preview-object file-object {typeCss}" ' +
                  'data="{data}" type="{type}" {style}>\n' + '<param name="movie" value="{caption}" />\n' +
                  $h.OBJECT_PARAMS + ' ' + $h.DEFAULT_PREVIEW + '\n</object>\n';
              tPdf = '<embed class="kv-preview-data file-preview-pdf" src="{data}" type="application/pdf" {style}>\n';
              tOther = '<div class="kv-preview-data file-preview-other-frame" {style}>\n' + $h.DEFAULT_PREVIEW + '\n</div>\n';
              tZoomCache = '<div class="kv-zoom-cache" style="display:none">{zoomContent}</div>';
              vDefaultDim = {width: "100%", height: "100%", 'min-height': "480px"};
              self.defaults = {
                  layoutTemplates: {
                      main1: tMain1,
                      main2: tMain2,
                      preview: tPreview,
                      close: tClose,
                      fileIcon: tFileIcon,
                      caption: tCaption,
                      modalMain: tModalMain,
                      modal: tModal,
                      progress: tProgress,
                      size: tSize,
                      footer: tFooter,
                      indicator: tIndicator,
                      actions: tActions,
                      actionDelete: tActionDelete,
                      actionUpload: tActionUpload,
                      actionDownload: tActionDownload,
                      actionZoom: tActionZoom,
                      actionDrag: tActionDrag,
                      btnDefault: tBtnDefault,
                      btnLink: tBtnLink,
                      btnBrowse: tBtnBrowse,
                      zoomCache: tZoomCache
                  },
                  previewMarkupTags: {
                      tagBefore1: tTagBef1,
                      tagBefore2: tTagBef2,
                      tagAfter: tTagAft
                  },
                  previewContentTemplates: {
                      generic: tGeneric,
                      html: tHtml,
                      image: tImage,
                      text: tText,
                      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"},
                      video: {width: "213px", height: "160px"},
                      audio: {width: "100%", height: "30px"},
                      flash: {width: "213px", height: "160px"},
                      object: {width: "213px", height: "160px"},
                      pdf: {width: "213px", height: "160px"},
                      other: {width: "213px", height: "160px"}
                  },
                  previewSettingsSmall: {
                      image: {width: "auto", height: "auto", 'max-width': "100%", 'max-height': "100%"},
                      html: {width: "100%", height: "160px"},
                      text: {width: "100%", height: "160px"},
                      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,
                      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"}
                  },
                  fileTypeSettings: {
                      image: function (vType, vName) {
                          return $h.compare(vType, 'image.*') || $h.compare(vName, /\.(gif|png|jpe?g)$/i);
                      },
                      html: function (vType, vName) {
                          return $h.compare(vType, 'text/html') || $h.compare(vName, /\.(htm|html)$/i);
                      },
                      text: function (vType, vName) {
                          return $h.compare(vType, 'text.*') || $h.compare(vName, /\.(xml|javascript)$/i) ||
                              $h.compare(vName, /\.(txt|md|csv|nfo|ini|json|php|js|css)$/i);
                      },
                      video: function (vType, vName) {
                          return $h.compare(vType, 'video.*') && ($h.compare(vType, /(ogg|mp4|mp?g|mov|webm|3gp)$/i) ||
                              $h.compare(vName, /\.(og?|mp4|webm|mp?g|mov|3gp)$/i));
                      },
                      audio: function (vType, vName) {
                          return $h.compare(vType, 'audio.*') && ($h.compare(vName, /(ogg|mp3|mp?g|wav)$/i) ||
                              $h.compare(vName, /\.(og?|mp3|mp?g|wav)$/i));
                      },
                      flash: function (vType, vName) {
                          return $h.compare(vType, 'application/x-shockwave-flash', true) || $h.compare(vName, /\.(swf)$/i);
                      },
                      pdf: function (vType, vName) {
                          return $h.compare(vType, 'application/pdf', true) || $h.compare(vName, /\.(pdf)$/i);
                      },
                      object: function () {
                          return true;
                      },
                      other: function () {
                          return true;
                      }
                  },
                  fileActionSettings: {
                      showRemove: true,
                      showUpload: true,
                      showDownload: true,
                      showZoom: true,
                      showDrag: true,
                      removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
                      removeClass: 'btn btn-sm btn-default btn-outline-secondary',
                      removeErrorClass: 'btn btn-sm btn-danger',
                      removeTitle: 'Remove file',
                      uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
                      uploadClass: 'btn btn-sm btn-default btn-outline-secondary',
                      uploadTitle: 'Upload file',
                      uploadRetryIcon: '<i class="glyphicon glyphicon-repeat"></i>',
                      uploadRetryTitle: 'Retry upload',
                      downloadIcon: '<i class="glyphicon glyphicon-download"></i>',
                      downloadClass: 'btn btn-sm btn-default btn-outline-secondary',
                      downloadTitle: 'Download file',
                      zoomIcon: '<i class="glyphicon glyphicon-zoom-in"></i>',
                      zoomClass: 'btn btn-sm btn-default btn-outline-secondary',
                      zoomTitle: 'View Details',
                      dragIcon: '<i class="glyphicon glyphicon-move"></i>',
                      dragClass: 'text-info',
                      dragTitle: 'Move / Rearrange',
                      dragSettings: {},
                      indicatorNew: '<i class="glyphicon glyphicon-plus-sign text-warning"></i>',
                      indicatorSuccess: '<i class="glyphicon glyphicon-ok-sign text-success"></i>',
                      indicatorError: '<i class="glyphicon glyphicon-exclamation-sign text-danger"></i>',
                      indicatorLoading: '<i class="glyphicon glyphicon-hourglass text-muted"></i>',
                      indicatorNewTitle: 'Not uploaded yet',
                      indicatorSuccessTitle: 'Uploaded',
                      indicatorErrorTitle: 'Upload Error',
                      indicatorLoadingTitle: 'Uploading ...'
                  }
              };
              $.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, cfg = self.defaults, tags = self.previewMarkupTags, tagBef, tagAft = tags.tagAfter;
              $.each(cfg.previewContentTemplates, function (key, value) {
                  if ($h.isEmpty(self.previewTemplates[key])) {
                      tagBef = tags.tagBefore2;
                      if (key === 'generic' || key === 'image' || key === 'html' || key === 'text') {
                          tagBef = tags.tagBefore1;
                      }
                      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 () {
                      return !!self.previewCache.data && !!self.previewCache.data.content ?
                          self.previewCache.data.content.length : 0;
                  },
                  get: function (i, isDisabled) {
                      var ind = 'init_' + i, data = self.previewCache.data, config = data.config[i],
                          content = data.content[i], previewId = self.previewInitId + '-' + ind, out, $tmp, cat, ftr,
                          fname, ftype, frameClass, asData = $h.ifSet('previewAsData', config, self.initialPreviewAsData),
                          parseTemplate = function (cat, dat, fn, ft, id, ftr, ind, fc, t) {
                              fc = ' file-preview-initial ' + $h.SORT_CSS + (fc ? ' ' + fc : '');
                              return self._generatePreviewTemplate(cat, dat, fn, ft, id, false, null, fc, ftr, ind, t);
                          };
                      if (!content) {
                          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, previewId, ftr, ind, frameClass);
                      } else {
                          out = parseTemplate('generic', content, fname, ftype, previewId, ftr, ind, frameClass, cat)
                              .setTokens({'content': data.content[i]});
                      }
                      if (data.tags.length && data.tags[i]) {
                          out = $h.replaceTags(out, data.tags[i]);
                      }
                      /** @namespace config.frameAttr */
                      if (!$h.isEmpty(config) && !$h.isEmpty(config.frameAttr)) {
                          $tmp = $(document.createElement('div')).html(out);
                          $tmp.find('.file-preview-initial').attr(config.frameAttr);
                          out = $tmp.html();
                          $tmp.remove();
                      }
                      return out;
                  },
                  add: function (content, config, tags, append) {
                      var data = self.previewCache.data, index;
                      if (!$h.isArray(content)) {
                          content = content.split(self.initialPreviewDelimiter);
                      }
                      if (append) {
                          index = data.content.push(content) - 1;
                          data.config[index] = config;
                          data.tags[index] = tags;
                      } else {
                          index = content.length - 1;
                          data.content = content;
                          data.config = config;
                          data.tags = tags;
                      }
                      self.previewCache.data = 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.data = data;
                  },
                  unset: function (index) {
                      var chk = self.previewCache.count();
                      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.splice(index, 1);
                      self.previewCache.data.config.splice(index, 1);
                      self.previewCache.data.tags.splice(index, 1);
                  },
                  out: function () {
                      var html = '', caption, len = self.previewCache.count(), i;
                      if (len === 0) {
                          return {content: '', caption: ''};
                      }
                      for (i = 0; i < len; i++) {
                          html += self.previewCache.get(i);
                      }
                      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), fs = self.fileActionSettings,
                          initPreviewShowDel = self.initialPreviewShowDelete || false,
                          dUrl = config.downloadUrl || self.initialPreviewDownloadUrl || '',
                          dFil = config.filename || config.caption || '',
                          initPreviewShowDwl = !!(dUrl),
                          sDel = $h.ifSet('showDelete', config, $h.ifSet('showDelete', fs, initPreviewShowDel)),
                          sDwl = $h.ifSet('showDownload', config, $h.ifSet('showDownload', fs, initPreviewShowDwl)),
                          sZm = $h.ifSet('showZoom', config, $h.ifSet('showZoom', fs, true)),
                          sDrg = $h.ifSet('showDrag', config, $h.ifSet('showDrag', fs, true)),
                          dis = (url === false) && isDisabled;
                      sDwl = sDwl && config.downloadUrl !== false && !!dUrl;
                      a = self._renderFileActions(false, sDwl, sDel, sZm, sDrg, dis, url, key, true, dUrl, dFil);
                      return self._getLayoutTemplate('footer').setTokens({
                          'progress': self._renderThumbProgress(),
                          'actions': a,
                          'caption': caption,
                          'size': self._getSize(size),
                          'width': width,
                          'indicator': ''
                      });
                  }
              };
              self.previewCache.init();
          },
          _handler: function ($el, event, callback) {
              var self = this, ns = self.namespace, ev = event.split(' ').join(ns + ' ') + ns;
              if (!$el || !$el.length) {
                  return;
              }
              $el.off(ev).on(ev, callback);
          },
          _log: function (msg) {
              var self = this, id = self.$element.attr('id');
              if (id) {
                  msg = '"' + id + '": ' + msg;
              }
              if (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('The input "type" must be set to "file" for initializing the "bootstrap-fileinput" plugin.');
              }
              return status;
          },
          _errorsExist: function () {
              var self = this, $err, $errList = self.$errorContainer.find('li');
              if ($errList.length) {
                  return true;
              }
              $err = $(document.createElement('div')).html(self.$errorContainer.html());
              $err.find('.kv-error-close').remove();
              $err.find('ul').remove();
              return !!$.trim($err.text()).length;
          },
          _errorHandler: function (evt, caption) {
              var self = this, err = evt.target.error, showError = function (msg) {
                  self._showError(msg.replace('{name}', caption));
              };
              /** @namespace err.NOT_FOUND_ERR */
              /** @namespace err.SECURITY_ERR */
              /** @namespace err.NOT_READABLE_ERR */
              if (err.code === err.NOT_FOUND_ERR) {
                  showError(self.msgFileNotFound);
              } else if (err.code === err.SECURITY_ERR) {
                  showError(self.msgFileSecured);
              } else if (err.code === err.NOT_READABLE_ERR) {
                  showError(self.msgFileNotReadable);
              } else if (err.code === err.ABORT_ERR) {
                  showError(self.msgFilePreviewAborted);
              } else {
                  showError(self.msgFilePreviewError);
              }
          },
          _addError: function (msg) {
              var self = this, $error = self.$errorContainer;
              if (msg && $error.length) {
                  $error.html(self.errorCloseButton + msg);
                  self._handler($error.find('.kv-error-close'), 'click', function () {
                      $error.fadeOut('slow');
                  });
              }
          },
          _resetErrors: function (fade) {
              var self = this, $error = self.$errorContainer;
              self.isError = false;
              self.$container.removeClass('has-error');
              $error.html('');
              if (fade) {
                  $error.fadeOut('slow');
              } else {
                  $error.hide();
              }
          },
          _showFolderError: function (folders) {
              var self = this, $error = self.$errorContainer, msg;
              if (!folders) {
                  return;
              }
              msg = self.msgFoldersNotAllowed.replace('{n}', folders);
              self._addError(msg);
              $h.addCss(self.$container, 'has-error');
              $error.fadeIn(800);
              self._raise('filefoldererror', [folders, msg]);
          },
          _showUploadError: function (msg, params, event) {
              var self = this, $error = self.$errorContainer, ev = event || 'fileuploaderror', e = params && params.id ?
                  '<li data-file-id="' + params.id + '">' + msg + '</li>' : '<li>' + msg + '</li>';
              if ($error.find('ul').length === 0) {
                  self._addError('<ul>' + e + '</ul>');
              } else {
                  $error.find('ul').append(e);
              }
              $error.fadeIn(800);
              self._raise(ev, [params, msg]);
              self.$container.removeClass('file-input-new');
              $h.addCss(self.$container, 'has-error');
              return true;
          },
          _showError: function (msg, params, event) {
              var self = this, $error = self.$errorContainer, ev = event || 'fileerror';
              params = params || {};
              params.reader = self.reader;
              self._addError(msg);
              $error.fadeIn(800);
              self._raise(ev, [params, msg]);
              if (!self.isAjaxUpload) {
                  self._clearFileInput();
              }
              self.$container.removeClass('file-input-new');
              $h.addCss(self.$container, 'has-error');
              self.$btnUpload.attr('disabled', true);
              return true;
          },
          _noFilesError: function (params) {
              var self = this, label = self.minFileCount > 1 ? self.filePlural : self.fileSingle,
                  msg = self.msgFilesTooLess.replace('{n}', self.minFileCount).replace('{files}', label),
                  $error = self.$errorContainer;
              self._addError(msg);
              self.isError = true;
              self._updateFileDetails(0);
              $error.fadeIn(800);
              self._raise('fileerror', [params, msg]);
              self._clearFileInput();
              $h.addCss(self.$container, 'has-error');
          },
          _parseError: function (operation, jqXHR, errorThrown, fileName) {
              /** @namespace jqXHR.responseJSON */
              var self = this, errMsg = $.trim(errorThrown + ''), textPre,
                  text = jqXHR.responseJSON !== undefined && jqXHR.responseJSON.error !== undefined ?
                      jqXHR.responseJSON.error : jqXHR.responseText;
              if (self.cancelling && self.msgUploadAborted) {
                  errMsg = self.msgUploadAborted;
              }
              if (self.showAjaxErrorDetails && text) {
                  text = $.trim(text.replace(/\n\s*\n/g, '\n'));
                  textPre = text.length ? '<pre>' + text + '</pre>' : '';
                  errMsg += errMsg ? textPre : text;
              }
              if (!errMsg) {
                  errMsg = self.msgAjaxError.replace('{operation}', operation);
              }
              self.cancelling = false;
              return fileName ? '<b>' + fileName + ': </b>' + errMsg : errMsg;
          },
          _parseFileType: function (file) {
              var self = this, isValid, vType, cat, i, types = self.allowedPreviewTypes || [];
              for (i = 0; i < types.length; i++) {
                  cat = types[i];
                  isValid = self.fileTypeSettings[cat];
                  vType = isValid(file.type, file.name) ? cat : '';
                  if (!$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;
          },
          _parseFilePreviewIcon: function (content, fname) {
              var self = this, icn = self._getPreviewIcon(fname) || self.previewFileIcon, out = content;
              if (out.indexOf('{previewFileIcon}') > -1) {
                  out = out.setTokens({'previewFileIconClass': self.previewFileIconClass, 'previewFileIcon': icn});
              }
              return out;
          },
          _raise: function (event, params) {
              var self = this, e = $.Event(event);
              if (params !== undefined) {
                  self.$element.trigger(e, params);
              } else {
                  self.$element.trigger(e);
              }
              if (e.isDefaultPrevented() || e.result === false) {
                  return false;
              }
              switch (event) {
                  // ignore these events
                  case 'filebatchuploadcomplete':
                  case 'filebatchuploadsuccess':
                  case 'fileuploaded':
                  case 'fileclear':
                  case 'filecleared':
                  case 'filereset':
                  case 'fileerror':
                  case 'filefoldererror':
                  case 'fileuploaderror':
                  case 'filebatchuploaderror':
                  case 'filedeleteerror':
                  case 'filecustomerror':
                  case 'filesuccessremove':
                      break;
                  // receive data response via `filecustomerror` event`
                  default:
                      if (!self.ajaxAborted) {
                          self.ajaxAborted = e.result;
                      }
                      break;
              }
              return true;
          },
          _listenFullScreen: function (isFullScreen) {
              var self = this, $modal = self.$modal, $btnFull, $btnBord;
              if (!$modal || !$modal.length) {
                  return;
              }
              $btnFull = $modal && $modal.find('.btn-fullscreen');
              $btnBord = $modal && $modal.find('.btn-borderless');
              if (!$btnFull.length || !$btnBord.length) {
                  return;
              }
              $btnFull.removeClass('active').attr('aria-pressed', 'false');
              $btnBord.removeClass('active').attr('aria-pressed', 'false');
              if (isFullScreen) {
                  $btnFull.addClass('active').attr('aria-pressed', 'true');
              } else {
                  $btnBord.addClass('active').attr('aria-pressed', 'true');
              }
              if ($modal.hasClass('file-zoom-fullscreen')) {
                  self._maximizeZoomDialog();
              } else {
                  if (isFullScreen) {
                      self._maximizeZoomDialog();
                  } else {
                      $btnBord.removeClass('active').attr('aria-pressed', 'false');
                  }
              }
          },
          _listen: function () {
              var self = this, $el = self.$element, $form = self.$form, $cont = self.$container, fullScreenEvents;
              self._handler($el, 'change', $.proxy(self._change, self));
              if (self.showBrowse) {
                  self._handler(self.$btnFile, 'click', $.proxy(self._browse, self));
              }
              self._handler($cont.find('.fileinput-remove:not([disabled])'), 'click', $.proxy(self.clear, self));
              self._handler($cont.find('.fileinput-cancel'), 'click', $.proxy(self.cancel, self));
              self._initDragDrop();
              self._handler($form, 'reset', $.proxy(self.clear, self));
              if (!self.isAjaxUpload) {
                  self._handler($form, 'submit', $.proxy(self._submitForm, self));
              }
              self._handler(self.$container.find('.fileinput-upload'), 'click', $.proxy(self._uploadClick, self));
              self._handler($(window), 'resize', function () {
                  self._listenFullScreen(screen.width === window.innerWidth && screen.height === window.innerHeight);
              });
              fullScreenEvents = 'webkitfullscreenchange mozfullscreenchange fullscreenchange MSFullscreenChange';
              self._handler($(document), fullScreenEvents, function () {
                  self._listenFullScreen($h.checkFullScreen());
              });
              self._autoFitContent();
              self._initClickable();
          },
          _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);
              });
          },
          _initClickable: function () {
              var self = this, $zone;
              if (!self.isClickable) {
                  return;
              }
              $zone = self.isAjaxUpload ? self.$dropZone : self.$preview.find('.file-default-preview');
              $h.addCss($zone, 'clickable');
              $zone.attr('tabindex', -1);
              self._handler($zone, 'click', function (e) {
                  var $tar = $(e.target);
                  if (!$tar.parents('.file-preview-thumbnails').length || $tar.parents('.file-default-preview').length) {
                      self.$element.trigger('click');
                      $zone.blur();
                  }
              });
          },
          _initDragDrop: function () {
              var self = this, $zone = self.$dropZone;
              if (self.isAjaxUpload && 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, hasFiles = $.inArray('Files', e.originalEvent.dataTransfer.types) > -1;
              self._zoneDragDropInit(e);
              if (self.isDisabled || !hasFiles) {
                  e.originalEvent.dataTransfer.effectAllowed = 'none';
                  e.originalEvent.dataTransfer.dropEffect = 'none';
                  return;
              }
              $h.addCss(self.$dropZone, 'file-highlighted');
          },
          _zoneDragLeave: function (e) {
              var self = this;
              self._zoneDragDropInit(e);
              if (self.isDisabled) {
                  return;
              }
              self.$dropZone.removeClass('file-highlighted');
          },
          _zoneDrop: function (e) {
              var self = this;
              e.preventDefault();
              /** @namespace e.originalEvent.dataTransfer */
              if (self.isDisabled || $h.isEmpty(e.originalEvent.dataTransfer.files)) {
                  return;
              }
              self._change(e, 'dragdrop');
              self.$dropZone.removeClass('file-highlighted');
          },
          _uploadClick: function (e) {
              var self = this, $btn = self.$container.find('.fileinput-upload'), $form,
                  isEnabled = !$btn.hasClass('disabled') && $h.isEmpty($btn.attr('disabled'));
              if (e && e.isDefaultPrevented()) {
                  return;
              }
              if (!self.isAjaxUpload) {
                  if (isEnabled && $btn.attr('type') !== 'submit') {
                      $form = $btn.closest('form');
                      // downgrade to normal form submit if possible
                      if ($form.length) {
                          $form.trigger('submit');
                      }
                      e.preventDefault();
                  }
                  return;
              }
              e.preventDefault();
              if (isEnabled) {
                  self.upload();
              }
          },
          _submitForm: function () {
              var self = this;
              return self._isFileSelectionValid() && !self._abort({});
          },
          _clearPreview: function () {
              var self = this, $p = self.$preview,
                  $thumbs = self.showUploadedThumbs ? self.getFrames(':not(.file-preview-success)') : self.getFrames();
              $thumbs.each(function () {
                  var $thumb = $(this);
                  $thumb.remove();
                  $h.cleanZoomCache($p.find('#zoom-' + $thumb.attr('id')));
              });
              if (!self.getFrames().length || !self.showPreview) {
                  self._resetUpload();
              }
              self._validateDefaultPreview();
          },
          _initSortable: function () {
              var self = this, $el = self.$preview, settings, selector = '.' + $h.SORT_CSS;
              if (!window.KvSortable || $el.find(selector).length === 0) {
                  return;
              }
              //noinspection JSUnusedGlobalSymbols
              settings = {
                  handle: '.drag-handle-init',
                  dataIdAttr: 'data-preview-id',
                  scroll: false,
                  draggable: selector,
                  onSort: function (e) {
                      var oldIndex = e.oldIndex, newIndex = e.newIndex, key, $frame;
                      self.initialPreview = $h.moveArray(self.initialPreview, oldIndex, newIndex);
                      self.initialPreviewConfig = $h.moveArray(self.initialPreviewConfig, oldIndex, newIndex);
                      self.previewCache.init();
                      for (var i = 0; i < self.initialPreviewConfig.length; i++) {
                          if (self.initialPreviewConfig[i] !== null) {
                              key = self.initialPreviewConfig[i].key;
                              $frame = $(".kv-file-remove[data-key='" + key + "']").closest($h.FRAMES);
                              $frame.attr('data-fileindex', 'init_' + i).attr('data-fileindex', 'init_' + i);
                          }
                      }
                      self._raise('filesorted', {
                          previewId: $(e.item).attr('id'),
                          'oldIndex': oldIndex,
                          'newIndex': newIndex,
                          stack: self.initialPreviewConfig
                      });
                  }
              };
              if ($el.data('kvsortable')) {
                  $el.kvsortable('destroy');
              }
              $.extend(true, settings, self.fileActionSettings.dragSettings);
              $el.kvsortable(settings);
          },
          _setPreviewContent: function (content) {
              var self = this;
              self.$preview.html(content);
              self._autoFitContent();
          },
          _initPreview: function (isInit) {
              var self = this, cap = self.initialCaption || '', out;
              if (!self.previewCache.count()) {
                  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');
              }
          },
          _getZoomButton: function (type) {
              var self = this, label = self.previewZoomButtonIcons[type], css = self.previewZoomButtonClasses[type],
                  title = ' title="' + (self.previewZoomButtonTitles[type] || '') + '" ',
                  params = title + (type === 'close' ? ' data-dismiss="modal" aria-hidden="true"' : '');
              if (type === 'fullscreen' || type === 'borderless' || type === 'toggleheader') {
                  params += ' data-toggle="button" aria-pressed="false" autocomplete="off"';
              }
              return '<button type="button" class="' + css + ' btn-' + type + '"' + params + '>' + label + '</button>';
          },
          _getModalContent: function () {
              var self = this;
              return self._getLayoutTemplate('modal').setTokens({
                  'rtl': self.rtl ? ' kv-rtl' : '',
                  'zoomFrameClass': self.frameClass,
                  'heading': self.msgZoomModalHeading,
                  'prev': self._getZoomButton('prev'),
                  'next': self._getZoomButton('next'),
                  'toggleheader': self._getZoomButton('toggleheader'),
                  'fullscreen': self._getZoomButton('fullscreen'),
                  'borderless': self._getZoomButton('borderless'),
                  'close': self._getZoomButton('close')
              });
          },
          _listenModalEvent: function (event) {
              var self = this, $modal = self.$modal, getParams = function (e) {
                  return {
                      sourceEvent: e,
                      previewId: $modal.data('previewId'),
                      modal: $modal
                  };
              };
              $modal.on(event + '.bs.modal', function (e) {
                  var $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless');
                  self._raise('filezoom' + event, getParams(e));
                  if (event === 'shown') {
                      $btnBord.removeClass('active').attr('aria-pressed', 'false');
                      $btnFull.removeClass('active').attr('aria-pressed', 'false');
                      if ($modal.hasClass('file-zoom-fullscreen')) {
                          self._maximizeZoomDialog();
                          if ($h.checkFullScreen()) {
                              $btnFull.addClass('active').attr('aria-pressed', 'true');
                          } else {
                              $btnBord.addClass('active').attr('aria-pressed', 'true');
                          }
                      }
                  }
              });
          },
          _initZoom: function () {
              var self = this, $dialog, modalMain = self._getLayoutTemplate('modalMain'), modalId = '#' + $h.MODAL_ID;
              if (!self.showPreview) {
                  return;
              }
              self.$modal = $(modalId);
              if (!self.$modal || !self.$modal.length) {
                  $dialog = $(document.createElement('div')).html(modalMain).insertAfter(self.$container);
                  self.$modal = $(modalId).insertBefore($dialog);
                  $dialog.remove();
              }
              $h.initModal(self.$modal);
              self.$modal.html(self._getModalContent());
              $.each($h.MODAL_EVENTS, function (key, event) {
                  self._listenModalEvent(event);
              });
          },
          _initZoomButtons: function () {
              var self = this, previewId = self.$modal.data('previewId') || '', $first, $last,
                  thumbs = self.getFrames().toArray(), len = thumbs.length, $prev = self.$modal.find('.btn-prev'),
                  $next = self.$modal.find('.btn-next');
              if (thumbs.length < 2) {
                  $prev.hide();
                  $next.hide();
                  return;
              } else {
                  $prev.show();
                  $next.show();
              }
              if (!len) {
                  return;
              }
              $first = $(thumbs[0]);
              $last = $(thumbs[len - 1]);
              $prev.removeAttr('disabled');
              $next.removeAttr('disabled');
              if ($first.length && $first.attr('id') === previewId) {
                  $prev.attr('disabled', true);
              }
              if ($last.length && $last.attr('id') === previewId) {
                  $next.attr('disabled', true);
              }
          },
          _maximizeZoomDialog: function () {
              var self = this, $modal = self.$modal, $head = $modal.find('.modal-header:visible'),
                  $foot = $modal.find('.modal-footer:visible'), $body = $modal.find('.modal-body'),
                  h = $(window).height(), diff = 0;
              $modal.addClass('file-zoom-fullscreen');
              if ($head && $head.length) {
                  h -= $head.outerHeight(true);
              }
              if ($foot && $foot.length) {
                  h -= $foot.outerHeight(true);
              }
              if ($body && $body.length) {
                  diff = $body.outerHeight(true) - $body.height();
                  h -= diff;
              }
              $modal.find('.kv-zoom-body').height(h);
          },
          _resizeZoomDialog: function (fullScreen) {
              var self = this, $modal = self.$modal, $btnFull = $modal.find('.btn-fullscreen'),
                  $btnBord = $modal.find('.btn-borderless');
              if ($modal.hasClass('file-zoom-fullscreen')) {
                  $h.toggleFullScreen(false);
                  if (!fullScreen) {
                      if (!$btnFull.hasClass('active')) {
                          $modal.removeClass('file-zoom-fullscreen');
                          self.$modal.find('.kv-zoom-body').css('height', self.zoomModalHeight);
                      } else {
                          $btnFull.removeClass('active').attr('aria-pressed', 'false');
                      }
                  } else {
                      if (!$btnFull.hasClass('active')) {
                          $modal.removeClass('file-zoom-fullscreen');
                          self._resizeZoomDialog(true);
                          if ($btnBord.hasClass('active')) {
                              $btnBord.removeClass('active').attr('aria-pressed', 'false');
                          }
                      }
                  }
              } else {
                  if (!fullScreen) {
                      self._maximizeZoomDialog();
                      return;
                  }
                  $h.toggleFullScreen(true);
              }
              $modal.focus();
          },
          _setZoomContent: function ($frame, animate) {
              var self = this, $content, tmplt, body, title, $body, $dataEl, config, pid = $frame.attr('id'),
                  $modal = self.$modal, $prev = $modal.find('.btn-prev'), $next = $modal.find('.btn-next'), $tmp,
                  $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless'), cap, size,
                  $btnTogh = $modal.find('.btn-toggleheader'), $zoomPreview = self.$preview.find('#zoom-' + pid);
              tmplt = $zoomPreview.attr('data-template') || 'generic';
              $content = $zoomPreview.find('.kv-file-content');
              body = $content.length ? $content.html() : '';
              cap = $frame.data('caption') || '';
              size = $frame.data('size') || '';
              title = cap + ' ' + size;
              $modal.find('.kv-zoom-title').attr('title', $('<div/>').html(title).text()).html(title);
              $body = $modal.find('.kv-zoom-body');
              $modal.removeClass('kv-single-content');
              if (animate) {
                  $tmp = $body.addClass('file-thumb-loading').clone().insertAfter($body);
                  $body.html(body).hide();
                  $tmp.fadeOut('fast', function () {
                      $body.fadeIn('fast', function () {
                          $body.removeClass('file-thumb-loading');
                      });
                      $tmp.remove();
                  });
              } else {
                  $body.html(body);
              }
              config = self.previewZoomSettings[tmplt];
              if (config) {
                  $dataEl = $body.find('.kv-preview-data');
                  $h.addCss($dataEl, 'file-zoom-detail');
                  $.each(config, function (key, value) {
                      $dataEl.css(key, value);
                      if (($dataEl.attr('width') && key === 'width') || ($dataEl.attr('height') && key === 'height')) {
                          $dataEl.removeAttr(key);
                      }
                  });
              }
              $modal.data('previewId', pid);
              var $img = $body.find('img');
              if ($img.length) {
                  $h.adjustOrientedImage($img, true);
              }
              self._handler($prev, 'click', function () {
                  self._zoomSlideShow('prev', pid);
              });
              self._handler($next, 'click', function () {
                  self._zoomSlideShow('next', pid);
              });
              self._handler($btnFull, 'click', function () {
                  self._resizeZoomDialog(true);
              });
              self._handler($btnBord, 'click', function () {
                  self._resizeZoomDialog(false);
              });
              self._handler($btnTogh, 'click', function () {
                  var $header = $modal.find('.modal-header'), $floatBar = $modal.find('.modal-body .floating-buttons'),
                      ht, $actions = $header.find('.kv-zoom-actions'), resize = function (height) {
                          var $body = self.$modal.find('.kv-zoom-body'), h = self.zoomModalHeight;
                          if ($modal.hasClass('file-zoom-fullscreen')) {
                              h = $body.outerHeight(true);
                              if (!height) {
                                  h = h - $header.outerHeight(true);
                              }
                          }
                          $body.css('height', height ? h + height : h);
                      };
                  if ($header.is(':visible')) {
                      ht = $header.outerHeight(true);
                      $header.slideUp('slow', function () {
                          $actions.find('.btn').appendTo($floatBar);
                          resize(ht);
                      });
                  } else {
                      $floatBar.find('.btn').appendTo($actions);
                      $header.slideDown('slow', function () {
                          resize();
                      });
                  }
                  $modal.focus();
              });
              self._handler($modal, 'keydown', function (e) {
                  var key = e.which || e.keyCode;
                  if (key === 37 && !$prev.attr('disabled')) {
                      self._zoomSlideShow('prev', pid);
                  }
                  if (key === 39 && !$next.attr('disabled')) {
                      self._zoomSlideShow('next', pid);
                  }
              });
          },
          _zoomPreview: function ($btn) {
              var self = this, $frame, $modal = self.$modal;
              if (!$btn.length) {
                  throw 'Cannot zoom to detailed preview!';
              }
              $h.initModal($modal);
              $modal.html(self._getModalContent());
              $frame = $btn.closest($h.FRAMES);
              self._setZoomContent($frame);
              $modal.modal('show');
              self._initZoomButtons();
          },
          _zoomSlideShow: function (dir, previewId) {
              var self = this, $btn = self.$modal.find('.kv-zoom-actions .btn-' + dir), $targFrame, i,
                  thumbs = self.getFrames().toArray(), len = thumbs.length, out;
              if ($btn.attr('disabled')) {
                  return;
              }
              for (i = 0; i < len; i++) {
                  if ($(thumbs[i]).attr('id') === previewId) {
                      out = dir === 'prev' ? i - 1 : i + 1;
                      break;
                  }
              }
              if (out < 0 || out >= len || !thumbs[out]) {
                  return;
              }
              $targFrame = $(thumbs[out]);
              if ($targFrame.length) {
                  self._setZoomContent($targFrame, true);
              }
              self._initZoomButtons();
              self._raise('filezoom' + dir, {'previewId': previewId, modal: self.$modal});
          },
          _initZoomButton: function () {
              var self = this;
              self.$preview.find('.kv-file-zoom').each(function () {
                  var $el = $(this);
                  self._handler($el, 'click', function () {
                      self._zoomPreview($el);
                  });
              });
          },
          _clearObjects: function ($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, $tmpEl;
              self.fileInputCleared = true;
              if ($h.isEmpty($el.val())) {
                  return;
              }
              // Fix for IE ver < 11, that does not clear file inputs. Requires a sequence of steps to prevent IE
              // crashing but still allow clearing of the file input.
              if (self.isIE9 || self.isIE10) {
                  $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();
              } else { // normal input clear behavior for other sane browsers
                  $el.val('');
              }
          },
          _resetUpload: function () {
              var self = this;
              self.uploadCache = {content: [], config: [], tags: [], append: true};
              self.uploadCount = 0;
              self.uploadStatus = {};
              self.uploadLog = [];
              self.uploadAsyncCount = 0;
              self.loadedImages = [];
              self.totalImagesCount = 0;
              self.$btnUpload.removeAttr('disabled');
              self._setProgress(0);
              self.$progress.hide();
              self._resetErrors(false);
              self.ajaxAborted = false;
              self.ajaxRequests = [];
              self._resetCanvas();
              self.cacheInitialPreview = {};
              if (self.overwriteInitial) {
                  self.initialPreview = [];
                  self.initialPreviewConfig = [];
                  self.initialPreviewThumbTags = [];
                  self.previewCache.data = {
                      content: [],
                      config: [],
                      tags: []
                  };
              }
          },
          _resetCanvas: function () {
              var self = this;
              if (self.canvas && self.imageCanvasContext) {
                  self.imageCanvasContext.clearRect(0, 0, self.canvas.width, self.canvas.height);
              }
          },
          _hasInitialPreview: function () {
              var self = this;
              return !self.overwriteInitial && self.previewCache.count();
          },
          _resetPreview: function () {
              var self = this, out, cap;
              if (self.previewCache.count()) {
                  out = self.previewCache.out();
                  self._setPreviewContent(out.content);
                  self._setInitThumbAttr();
                  cap = self.initialCaption ? self.initialCaption : out.caption;
                  self._setCaption(cap);
              } else {
                  self._clearPreview();
                  self._initCaption();
              }
              if (self.showPreview) {
                  self._initZoom();
                  self._initSortable();
              }
          },
          _clearDefaultPreview: function () {
              var self = this;
              self.$preview.find('.file-default-preview').remove();
          },
          _validateDefaultPreview: function () {
              var self = this;
              if (!self.showPreview || $h.isEmpty(self.defaultPreviewContent)) {
                  return;
              }
              self._setPreviewContent('<div class="file-default-preview">' + self.defaultPreviewContent + '</div>');
              self.$container.removeClass('file-input-new');
              self._initClickable();
          },
          _resetPreviewThumbs: function (isAjax) {
              var self = this, out;
              if (isAjax) {
                  self._clearPreview();
                  self.clearStack();
                  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 $h.replaceTags(template, self.customLayoutTags);
          },
          _getPreviewTemplate: function (t) {
              var self = this, template = self.previewTemplates[t];
              if ($h.isEmpty(self.customPreviewTags)) {
                  return template;
              }
              return $h.replaceTags(template, self.customPreviewTags);
          },
          _getOutData: function (jqXHR, responseData, filesData) {
              var self = this;
              jqXHR = jqXHR || {};
              responseData = responseData || {};
              filesData = filesData || self.filestack.slice(0) || {};
              return {
                  form: self.formdata,
                  files: filesData,
                  filenames: self.filenames,
                  filescount: self.getFilesCount(),
                  extra: self._getExtraData(),
                  response: responseData,
                  reader: self.reader,
                  jqXHR: jqXHR
              };
          },
          _getMsgSelected: function (n) {
              var self = this, strFiles = n === 1 ? self.fileSingle : self.filePlural;
              return n > 0 ? self.msgSelected.replace('{n}', n).replace('{files}', strFiles) : self.msgNoFilesSelected;
          },
          _getFrame: function (id) {
              var self = this, $frame = $('#' + id);
              if (!$frame.length) {
                  self._log('Invalid thumb frame with id: "' + id + '".');
                  return null;
              }
              return $frame;
          },
          _getThumbs: function (css) {
              css = css || '';
              return this.getFrames(':not(.file-preview-initial)' + css);
          },
          _getExtraData: function (previewId, index) {
              var self = this, data = self.uploadExtraData;
              if (typeof self.uploadExtraData === "function") {
                  data = self.uploadExtraData(previewId, index);
              }
              return data;
          },
          _initXhr: function (xhrobj, previewId, fileCount) {
              var self = this;
              if (xhrobj.upload) {
                  xhrobj.upload.addEventListener('progress', function (event) {
                      var pct = 0, total = event.total, position = event.loaded || event.position;
                      /** @namespace event.lengthComputable */
                      if (event.lengthComputable) {
                          pct = Math.floor(position / total * 100);
                      }
                      if (previewId) {
                          self._setAsyncUploadStatus(previewId, pct, fileCount);
                      } else {
                          self._setProgress(pct);
                      }
                  }, false);
              }
              return xhrobj;
          },
          _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;
              }
              if (type === 'delete') {
                  self.ajaxDeleteSettings = settings;
              } else {
                  self.ajaxSettings = settings;
              }
          },
          _ajaxSubmit: function (fnBefore, fnSuccess, fnComplete, fnError, previewId, index) {
              var self = this, settings;
              if (!self._raise('filepreajax', [previewId, index])) {
                  return;
              }
              self._uploadExtra(previewId, index);
              self._mergeAjaxCallback('beforeSend', fnBefore);
              self._mergeAjaxCallback('success', fnSuccess);
              self._mergeAjaxCallback('complete', fnComplete);
              self._mergeAjaxCallback('error', fnError);
              settings = $.extend(true, {}, {
                  xhr: function () {
                      var xhrobj = $.ajaxSettings.xhr();
                      return self._initXhr(xhrobj, previewId, self.getFileStack().length);
                  },
                  url: index && self.uploadUrlThumb ? self.uploadUrlThumb : self.uploadUrl,
                  type: 'POST',
                  dataType: 'json',
                  data: self.formdata,
                  cache: false,
                  processData: false,
                  contentType: false
              }, self.ajaxSettings);
              self.ajaxRequests.push($.ajax(settings));
          },
          _mergeArray: function (prop, content) {
              var self = this, arr1 = $h.cleanArray(self[prop]), arr2 = $h.cleanArray(content);
              self[prop] = arr1.concat(arr2);
          },
          _initUploadSuccess: function (out, $thumb, allFiles) {
              var self = this, append, data, index, $div, $newCache, content, config, tags, i;
              if (!self.showPreview || typeof out !== 'object' || $.isEmptyObject(out)) {
                  return;
              }
              if (out.initialPreview !== undefined && out.initialPreview.length > 0) {
                  self.hasInitData = true;
                  content = out.initialPreview || [];
                  config = out.initialPreviewConfig || [];
                  tags = out.initialPreviewThumbTags || [];
                  append = out.append === undefined || out.append;
                  if (content.length > 0 && !$h.isArray(content)) {
                      content = content.split(self.initialPreviewDelimiter);
                  }
                  self._mergeArray('initialPreview', content);
                  self._mergeArray('initialPreviewConfig', config);
                  self._mergeArray('initialPreviewThumbTags', tags);
                  if ($thumb !== undefined) {
                      if (!allFiles) {
                          index = self.previewCache.add(content, config[0], tags[0], append);
                          data = self.previewCache.get(index, false);
                          $div = $(document.createElement('div')).html(data).hide().insertAfter($thumb);
                          $newCache = $div.find('.kv-zoom-cache');
                          if ($newCache && $newCache.length) {
                              $newCache.insertAfter($thumb);
                          }
                          $thumb.fadeOut('slow', function () {
                              var $newThumb = $div.find('.file-preview-frame');
                              if ($newThumb && $newThumb.length) {
                                  $newThumb.insertBefore($thumb).fadeIn('slow').css('display:inline-block');
                              }
                              self._initPreviewActions();
                              self._clearFileInput();
                              $h.cleanZoomCache(self.$preview.find('#zoom-' + $thumb.attr('id')));
                              $thumb.remove();
                              $div.remove();
                              self._initSortable();
                          });
                      } else {
                          i = $thumb.attr('data-fileindex');
                          self.uploadCache.content[i] = content[0];
                          self.uploadCache.config[i] = config[0] || [];
                          self.uploadCache.tags[i] = tags[0] || [];
                          self.uploadCache.append = append;
                      }
                  } else {
                      self.previewCache.set(content, config, tags, append);
                      self._initPreview();
                      self._initPreviewActions();
                  }
              }
          },
          _initSuccessThumbs: function () {
              var self = this;
              if (!self.showPreview) {
                  return;
              }
              self._getThumbs($h.FRAMES + '.file-preview-success').each(function () {
                  var $thumb = $(this), $preview = self.$preview, $remove = $thumb.find('.kv-file-remove');
                  $remove.removeAttr('disabled');
                  self._handler($remove, 'click', function () {
                      var id = $thumb.attr('id'),
                          out = self._raise('filesuccessremove', [id, $thumb.attr('data-fileindex')]);
                      $h.cleanMemory($thumb);
                      if (out === false) {
                          return;
                      }
                      $thumb.fadeOut('slow', function () {
                          $h.cleanZoomCache($preview.find('#zoom-' + id));
                          $thumb.remove();
                          if (!self.getFrames().length) {
                              self.reset();
                          }
                      });
                  });
              });
          },
          _checkAsyncComplete: function () {
              var self = this, previewId, i;
              for (i = 0; i < self.filestack.length; i++) {
                  if (self.filestack[i]) {
                      previewId = self.previewInitId + "-" + i;
                      if ($.inArray(previewId, self.uploadLog) === -1) {
                          return false;
                      }
                  }
              }
              return (self.uploadAsyncCount === self.uploadLog.length);
          },
          _uploadExtra: function (previewId, index) {
              var self = this, data = self._getExtraData(previewId, index);
              if (data.length === 0) {
                  return;
              }
              $.each(data, function (key, value) {
                  self.formdata.append(key, value);
              });
          },
          _uploadSingle: function (i, allFiles) {
              var self = this, total = self.getFileStack().length, formdata = new FormData(), outData,
                  previewId = self.previewInitId + "-" + i, $thumb, chkComplete, $btnUpload, $btnDelete,
                  hasPostData = self.filestack.length > 0 || !$.isEmptyObject(self.uploadExtraData), uploadFailed,
                  $prog = $('#' + previewId).find('.file-thumb-progress'), fnBefore, fnSuccess, fnComplete, fnError,
                  updateUploadLog, params = {id: previewId, index: i};
              self.formdata = formdata;
              if (self.showPreview) {
                  $thumb = $('#' + previewId + ':not(.file-preview-initial)');
                  $btnUpload = $thumb.find('.kv-file-upload');
                  $btnDelete = $thumb.find('.kv-file-remove');
                  $prog.show();
              }
              if (total === 0 || !hasPostData || ($btnUpload && $btnUpload.hasClass('disabled')) || self._abort(params)) {
                  return;
              }
              updateUploadLog = function (i, previewId) {
                  if (!uploadFailed) {
                      self.updateStack(i, undefined);
                  }
                  self.uploadLog.push(previewId);
                  if (self._checkAsyncComplete()) {
                      self.fileBatchCompleted = true;
                  }
              };
              chkComplete = function () {
                  var u = self.uploadCache, $initThumbs, i, j, len = 0, data = self.cacheInitialPreview;
                  if (!self.fileBatchCompleted) {
                      return;
                  }
                  if (data && data.content) {
                      len = data.content.length;
                  }
                  setTimeout(function () {
                      var triggerReset = self.getFileStack(true).length === 0;
                      if (self.showPreview) {
                          self.previewCache.set(u.content, u.config, u.tags, u.append);
                          if (len) {
                              for (i = 0; i < u.content.length; i++) {
                                  j = i + len;
                                  data.content[j] = u.content[i];
                                  //noinspection JSUnresolvedVariable
                                  if (data.config.length) {
                                      data.config[j] = u.config[i];
                                  }
                                  if (data.tags.length) {
                                      data.tags[j] = u.tags[i];
                                  }
                              }
                              self.initialPreview = $h.cleanArray(data.content);
                              self.initialPreviewConfig = $h.cleanArray(data.config);
                              self.initialPreviewThumbTags = $h.cleanArray(data.tags);
                          } else {
                              self.initialPreview = u.content;
                              self.initialPreviewConfig = u.config;
                              self.initialPreviewThumbTags = u.tags;
                          }
                          self.cacheInitialPreview = {};
                          if (self.hasInitData) {
                              self._initPreview();
                              self._initPreviewActions();
                          }
                      }
                      self.unlock(triggerReset);
                      if (triggerReset) {
                          self._clearFileInput();
                      }
                      $initThumbs = self.$preview.find('.file-preview-initial');
                      if (self.uploadAsync && $initThumbs.length) {
                          $h.addCss($initThumbs, $h.SORT_CSS);
                          self._initSortable();
                      }
                      self._raise('filebatchuploadcomplete', [self.filestack, self._getExtraData()]);
                      self.uploadCount = 0;
                      self.uploadStatus = {};
                      self.uploadLog = [];
                      self._setProgress(101);
                  }, 100);
              };
              fnBefore = function (jqXHR) {
                  outData = self._getOutData(jqXHR);
                  self.fileBatchCompleted = false;
                  if (self.showPreview) {
                      if (!$thumb.hasClass('file-preview-success')) {
                          self._setThumbStatus($thumb, 'Loading');
                          $h.addCss($thumb, 'file-uploading');
                      }
                      $btnUpload.attr('disabled', true);
                      $btnDelete.attr('disabled', true);
                  }
                  if (!allFiles) {
                      self.lock();
                  }
                  self._raise('filepreupload', [outData, previewId, i]);
                  $.extend(true, params, outData);
                  if (self._abort(params)) {
                      jqXHR.abort();
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  var pid = self.showPreview && $thumb.attr('id') ? $thumb.attr('id') : previewId;
                  outData = self._getOutData(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, allFiles);
                              self._setProgress(101, $prog);
                          }
                          self._raise('fileuploaded', [outData, pid, i]);
                          if (!allFiles) {
                              self.updateStack(i, undefined);
                          } else {
                              updateUploadLog(i, pid);
                          }
                      } else {
                          uploadFailed = true;
                          self._showUploadError(data.error, params);
                          self._setPreviewError($thumb, i, self.filestack[i], self.retryErrorUploads);
                          if (!self.retryErrorUploads) {
                              $btnUpload.hide();
                          }
                          if (allFiles) {
                              updateUploadLog(i, pid);
                          }
                          self._setProgress(101, $('#' + pid).find('.file-thumb-progress'), self.msgUploadError);
                      }
                  }, 100);
              };
              fnComplete = function () {
                  setTimeout(function () {
                      if (self.showPreview) {
                          $btnUpload.removeAttr('disabled');
                          $btnDelete.removeAttr('disabled');
                          $thumb.removeClass('file-uploading');
                      }
                      if (!allFiles) {
                          self.unlock(false);
                          self._clearFileInput();
                      } else {
                          chkComplete();
                      }
                      self._initSuccessThumbs();
                  }, 100);
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  var op = self.ajaxOperations.uploadThumb,
                      errMsg = self._parseError(op, jqXHR, errorThrown, (allFiles && self.filestack[i].name ? self.filestack[i].name : null));
                  uploadFailed = true;
                  setTimeout(function () {
                      if (allFiles) {
                          updateUploadLog(i, previewId);
                      }
                      self.uploadStatus[previewId] = 100;
                      self._setPreviewError($thumb, i, self.filestack[i], self.retryErrorUploads);
                      if (!self.retryErrorUploads) {
                          $btnUpload.hide();
                      }
                      $.extend(true, params, self._getOutData(jqXHR));
                      self._setProgress(101, $prog, self.msgAjaxProgressError.replace('{operation}', op));
                      self._setProgress(101, $('#' + previewId).find('.file-thumb-progress'), self.msgUploadError);
                      self._showUploadError(errMsg, params);
                  }, 100);
              };
              formdata.append(self.uploadFileAttr, self.filestack[i], self.filenames[i]);
              formdata.append('file_id', i);
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, previewId, i);
          },
          _uploadBatch: function () {
              var self = this, files = self.filestack, total = files.length, params = {}, fnBefore, fnSuccess, fnError,
                  fnComplete, hasPostData = self.filestack.length > 0 || !$.isEmptyObject(self.uploadExtraData),
                  setAllUploaded;
              self.formdata = new FormData();
              if (total === 0 || !hasPostData || self._abort(params)) {
                  return;
              }
              setAllUploaded = function () {
                  $.each(files, function (key) {
                      self.updateStack(key, undefined);
                  });
                  self._clearFileInput();
              };
              fnBefore = function (jqXHR) {
                  self.lock();
                  var outData = self._getOutData(jqXHR);
                  if (self.showPreview) {
                      self._getThumbs().each(function () {
                          var $thumb = $(this), $btnUpload = $thumb.find('.kv-file-upload'),
                              $btnDelete = $thumb.find('.kv-file-remove');
                          if (!$thumb.hasClass('file-preview-success')) {
                              self._setThumbStatus($thumb, 'Loading');
                              $h.addCss($thumb, 'file-uploading');
                          }
                          $btnUpload.attr('disabled', true);
                          $btnDelete.attr('disabled', true);
                      });
                  }
                  self._raise('filebatchpreupload', [outData]);
                  if (self._abort(outData)) {
                      jqXHR.abort();
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  /** @namespace data.errorkeys */
                  var outData = self._getOutData(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), i = $thumb.attr('data-fileindex');
                              $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, i, self.filestack[i], self.retryErrorUploads);
                                  if (!self.retryErrorUploads) {
                                      $thumb.find('.kv-file-upload').hide();
                                      self.updateStack(i, undefined);
                                  }
                              } else {
                                  $thumb.find('.kv-file-upload').hide();
                                  self._setThumbStatus($thumb, 'Success');
                                  self.updateStack(i, undefined);
                              }
                              if (!$thumb.hasClass('file-preview-error') || self.retryErrorUploads) {
                                  key++;
                              }
                          });
                          self._initUploadSuccess(data);
                      }
                      self._showUploadError(data.error, outData, 'filebatchuploaderror');
                      self._setProgress(101, self.$progress, self.msgUploadError);
                  }
              };
              fnComplete = function () {
                  self.unlock();
                  self._initSuccessThumbs();
                  self._clearFileInput();
                  self._raise('filebatchuploadcomplete', [self.filestack, self._getExtraData()]);
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  var outData = self._getOutData(jqXHR), op = self.ajaxOperations.uploadBatch,
                      errMsg = self._parseError(op, jqXHR, errorThrown);
                  self._showUploadError(errMsg, outData, 'filebatchuploaderror');
                  self.uploadFileCount = total - 1;
                  if (!self.showPreview) {
                      return;
                  }
                  self._getThumbs().each(function () {
                      var $thumb = $(this), key = $thumb.attr('data-fileindex');
                      $thumb.removeClass('file-uploading');
                      if (self.filestack[key] !== undefined) {
                          self._setPreviewError($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));
              };
              $.each(files, function (key, data) {
                  if (!$h.isEmpty(files[key])) {
                      self.formdata.append(self.uploadFileAttr, data, self.filenames[key]);
                  }
              });
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError);
          },
          _uploadExtraOnly: function () {
              var self = this, params = {}, fnBefore, fnSuccess, fnComplete, fnError;
              self.formdata = new FormData();
              if (self._abort(params)) {
                  return;
              }
              fnBefore = function (jqXHR) {
                  self.lock();
                  var outData = self._getOutData(jqXHR);
                  self._raise('filebatchpreupload', [outData]);
                  self._setProgress(50);
                  params.data = outData;
                  params.xhr = jqXHR;
                  if (self._abort(params)) {
                      jqXHR.abort();
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  var outData = self._getOutData(jqXHR, data);
                  if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                      self._raise('filebatchuploadsuccess', [outData]);
                      self._clearFileInput();
                      self._initUploadSuccess(data);
                      self._setProgress(101);
                  } else {
                      self._showUploadError(data.error, outData, 'filebatchuploaderror');
                  }
              };
              fnComplete = function () {
                  self.unlock();
                  self._clearFileInput();
                  self._raise('filebatchuploadcomplete', [self.filestack, self._getExtraData()]);
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  var outData = self._getOutData(jqXHR), op = self.ajaxOperations.uploadExtra,
                      errMsg = self._parseError(op, jqXHR, errorThrown);
                  params.data = outData;
                  self._showUploadError(errMsg, outData, 'filebatchuploaderror');
                  self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
              };
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError);
          },
          _deleteFileIndex: function ($frame) {
              var self = this, ind = $frame.attr('data-fileindex');
              if (ind.substring(0, 5) === 'init_') {
                  ind = parseInt(ind.replace('init_', ''));
                  self.initialPreview = $h.spliceArray(self.initialPreview, ind);
                  self.initialPreviewConfig = $h.spliceArray(self.initialPreviewConfig, ind);
                  self.initialPreviewThumbTags = $h.spliceArray(self.initialPreviewThumbTags, ind);
                  self.getFrames().each(function () {
                      var $nFrame = $(this), nInd = $nFrame.attr('data-fileindex');
                      if (nInd.substring(0, 5) === 'init_') {
                          nInd = parseInt(nInd.replace('init_', ''));
                          if (nInd > ind) {
                              nInd--;
                              $nFrame.attr('data-fileindex', 'init_' + nInd);
                          }
                      }
                  });
                  if (self.uploadAsync) {
                      self.cacheInitialPreview = self.getPreview();
                  }
              }
          },
          _initFileActions: function () {
              var self = this, $preview = self.$preview;
              if (!self.showPreview) {
                  return;
              }
              self._initZoomButton();
              self.getFrames(' .kv-file-remove').each(function () {
                  var $el = $(this), $frame = $el.closest($h.FRAMES), hasError, id = $frame.attr('id'),
                      ind = $frame.attr('data-fileindex'), n, cap, status;
                  self._handler($el, 'click', function () {
                      status = self._raise('filepreremove', [id, ind]);
                      if (status === false || !self._validateMinCount()) {
                          return false;
                      }
                      hasError = $frame.hasClass('file-preview-error');
                      $h.cleanMemory($frame);
                      $frame.fadeOut('slow', function () {
                          $h.cleanZoomCache($preview.find('#zoom-' + id));
                          self.updateStack(ind, undefined);
                          self._clearObjects($frame);
                          $frame.remove();
                          if (id && hasError) {
                              self.$errorContainer.find('li[data-file-id="' + id + '"]').fadeOut('fast', function () {
                                  $(this).remove();
                                  if (!self._errorsExist()) {
                                      self._resetErrors();
                                  }
                              });
                          }
                          self._clearFileInput();
                          var filestack = self.getFileStack(true), chk = self.previewCache.count(),
                              len = filestack.length, hasThumb = self.showPreview && self.getFrames().length;
                          if (len === 0 && chk === 0 && !hasThumb) {
                              self.reset();
                          } else {
                              n = chk + len;
                              cap = n > 1 ? self._getMsgSelected(n) : (filestack[0] ? self._getFileNames()[0] : '');
                              self._setCaption(cap);
                          }
                          self._raise('fileremoved', [id, ind]);
                      });
                  });
              });
              self.getFrames(' .kv-file-upload').each(function () {
                  var $el = $(this);
                  self._handler($el, 'click', function () {
                      var $frame = $el.closest($h.FRAMES), ind = $frame.attr('data-fileindex');
                      self.$progress.hide();
                      if ($frame.hasClass('file-preview-error') && !self.retryErrorUploads) {
                          return;
                      }
                      self._uploadSingle(ind, false);
                  });
              });
          },
          _initPreviewActions: function () {
              var self = this, $preview = self.$preview, deleteExtraData = self.deleteExtraData || {},
                  btnRemove = $h.FRAMES + ' .kv-file-remove', settings = self.fileActionSettings,
                  origClass = settings.removeClass, errClass = settings.removeErrorClass,
                  resetProgress = function () {
                      var hasFiles = self.isAjaxUpload ? self.previewCache.count() : self.$element.get(0).files.length;
                      if (!$preview.find($h.FRAMES).length && !hasFiles) {
                          self._setCaption('');
                          self.reset();
                          self.initialCaption = '';
                      }
                  };
              self._initZoomButton();
              $preview.find(btnRemove).each(function () {
                  var $el = $(this), vUrl = $el.data('url') || self.deleteUrl, vKey = $el.data('key'),
                      fnBefore, fnSuccess, fnError, $thumb = $el.closest('.file-preview-frame');
                  if ($h.isEmpty(vUrl) || vKey === undefined) {
                      return;
                  }
                  var $frame = $el.closest($h.FRAMES), cache = self.previewCache.data,
                      settings, params, index = $frame.attr('data-fileindex'), config, extraData;
                  index = parseInt(index.replace('init_', ''));
                  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;
                  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]);
                      $el.removeClass(errClass);
                      if (self._abort()) {
                          jqXHR.abort();
                      } else {
                          $h.addCss($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;
                          self._showError(data.error, 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('init_', ''));
                          self.previewCache.unset(index);
                          n = self.previewCache.count();
                          cap = n > 0 ? self._getMsgSelected(n) : '';
                          self._deleteFileIndex($frame);
                          self._setCaption(cap);
                          self._raise('filedeleted', [vKey, jqXHR, extraData]);
                          $h.cleanZoomCache($preview.find('#zoom-' + $frame.attr('id')));
                          self._clearObjects($frame);
                          $frame.remove();
                          resetProgress();
                      });
                  };
                  fnError = function (jqXHR, textStatus, errorThrown) {
                      var op = self.ajaxOperations.deleteThumb, errMsg = self._parseError(op, jqXHR, errorThrown);
                      params.jqXHR = jqXHR;
                      params.response = {};
                      self._showError(errMsg, params, 'filedeleteerror');
                      $frame.removeClass('file-uploading');
                      $el.removeClass('disabled ' + origClass).addClass(errClass);
                      resetProgress();
                  };
                  self._mergeAjaxCallback('beforeSend', fnBefore, 'delete');
                  self._mergeAjaxCallback('success', fnSuccess, 'delete');
                  self._mergeAjaxCallback('error', fnError, 'delete');
                  settings = $.extend(true, {}, {
                      url: 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) {
                              $.ajax(settings);
                          }
                      }
                  });
              });
          },
          _hideFileIcon: function () {
              if (this.overwriteInitial) {
                  this.$captionContainer.find('.kv-caption-icon').hide();
              }
          },
          _showFileIcon: function () {
              this.$captionContainer.find('.kv-caption-icon').show();
          },
          _getSize: function (bytes) {
              var self = this, size = parseFloat(bytes), i, func = self.fileSizeGetter, sizes, out;
              if (!$.isNumeric(bytes) || !$.isNumeric(size)) {
                  return '';
              }
              if (typeof func === 'function') {
                  out = func(size);
              } else {
                  if (size === 0) {
                      out = '0.00 B';
                  } else {
                      i = Math.floor(Math.log(size) / Math.log(1024));
                      sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                      out = (size / Math.pow(1024, i)).toFixed(2) * 1 + ' ' + sizes[i];
                  }
              }
              return self._getLayoutTemplate('size').replace('{sizeText}', out);
          },
          _generatePreviewTemplate: function (cat, data, fname, ftype, previewId, isError, size, frameClass, foot, ind, templ) {
              var self = this, caption = self.slug(fname), prevContent, zoomContent = '', styleAttribs = '',
                  screenW = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                  config = screenW < 400 ? (self.previewSettingsSmall[cat] || self.defaults.previewSettingsSmall[cat]) :
                      (self.previewSettings[cat] || self.defaults.previewSettings[cat]),
                  footer = foot || self._renderFileFooter(caption, size, 'auto', isError),
                  hasIconSetting = self._getPreviewIcon(fname), typeCss = 'type-default',
                  forcePrevIcon = hasIconSetting && self.preferIconicPreview,
                  forceZoomIcon = hasIconSetting && self.preferIconicZoomPreview, getContent;
              if (config) {
                  $.each(config, function (key, val) {
                      styleAttribs += key + ':' + val + ';';
                  });
              }
              getContent = function (c, d, zoom, frameCss) {
                  var id = zoom ? 'zoom-' + previewId : previewId, tmplt = self._getPreviewTemplate(c),
                      css = (frameClass || '') + ' ' + frameCss;
                  if (self.frameClass) {
                      css = self.frameClass + ' ' + css;
                  }
                  if (zoom) {
                      css = css.replace(' ' + $h.SORT_CSS, '');
                  }
                  tmplt = self._parseFilePreviewIcon(tmplt, fname);
                  if (c === 'text') {
                      d = $h.htmlEncode(d);
                  }
                  if (cat === 'object' && !ftype) {
                      $.each(self.defaults.fileTypeSettings, function (key, func) {
                          if (key === 'object' || key === 'other') {
                              return;
                          }
                          if (func(fname, ftype)) {
                              typeCss = 'type-' + key;
                          }
                      });
                  }
                  return tmplt.setTokens({
                      'previewId': id,
                      'caption': caption,
                      'frameClass': css,
                      'type': ftype,
                      'fileindex': ind,
                      'typeCss': typeCss,
                      'footer': footer,
                      'data': d,
                      'template': templ || cat,
                      'style': styleAttribs ? 'style="' + styleAttribs + '"' : ''
                  });
              };
              ind = ind || previewId.slice(previewId.lastIndexOf('-') + 1);
              if (self.fileActionSettings.showZoom) {
                  zoomContent = getContent((forceZoomIcon ? 'other' : cat), data, true, 'kv-zoom-thumb');
              }
              zoomContent = '\n' + self._getLayoutTemplate('zoomCache').replace('{zoomContent}', zoomContent);
              prevContent = getContent((forcePrevIcon ? 'other' : cat), data, false, 'kv-preview-thumb');
              return prevContent + zoomContent;
          },
          _previewDefault: function (file, previewId, isDisabled) {
              var self = this, $preview = self.$preview;
              if (!self.showPreview) {
                  return;
              }
              var fname = file ? file.name : '', ftype = file ? file.type : '', content, size = file.size || 0,
                  caption = self.slug(fname), isError = isDisabled === true && !self.isAjaxUpload,
                  data = $h.objUrl.createObjectURL(file);
              self._clearDefaultPreview();
              content = self._generatePreviewTemplate('other', data, fname, ftype, previewId, isError, size);
              $preview.append("\n" + content);
              self._setThumbAttr(previewId, caption, size);
              if (isDisabled === true && self.isAjaxUpload) {
                  self._setThumbStatus($('#' + previewId), 'Error');
              }
          },
          _previewFile: function (i, file, theFile, previewId, data) {
              if (!this.showPreview) {
                  return;
              }
              var self = this, cat = self._parseFileType(file), fname = file ? file.name : '', caption = self.slug(fname),
                  types = self.allowedPreviewTypes, mimes = self.allowedPreviewMimeTypes, $preview = self.$preview,
                  chkTypes = types && types.indexOf(cat) >= 0, fsize = file.size || 0, ftype = file.type,
                  iData = (cat === 'text' || cat === 'html' || cat === 'image') ? theFile.target.result : data, content,
                  chkMimes = mimes && mimes.indexOf(ftype) !== -1;
              /** @namespace window.DOMPurify */
              if (cat === 'html' && self.purifyHtml && window.DOMPurify) {
                  iData = window.DOMPurify.sanitize(iData);
              }
              if (chkTypes || chkMimes) {
                  content = self._generatePreviewTemplate(cat, iData, fname, ftype, previewId, false, fsize);
                  self._clearDefaultPreview();
                  $preview.append("\n" + content);
                  var $img = $preview.find('#' + previewId + ' img');
                  if ($img.length && self.autoOrientImage) {
                      $h.validateOrientation(file, function (value) {
                          if (!value) {
                              self._validateImage(previewId, caption, ftype, fsize, iData);
                              return;
                          }
                          var $zoomImg = $preview.find('#zoom-' + previewId + ' img'), css = 'rotate-' + value;
                          if (value > 4) {
                              css += ($img.width() > $img.height() ? ' is-portrait-gt4' : ' is-landscape-gt4');
                          }
                          $h.addCss($img, css);
                          $h.addCss($zoomImg, css);
                          self._raise('fileimageoriented', {'$img': $img, 'file': file});
                          self._validateImage(previewId, caption, ftype, fsize, iData);
                          $h.adjustOrientedImage($img);
                      });
                  } else {
                      self._validateImage(previewId, caption, ftype, fsize, iData);
                  }
              } else {
                  self._previewDefault(file, previewId);
              }
              self._setThumbAttr(previewId, caption, fsize);
              self._initSortable();
          },
          _setThumbAttr: function (id, caption, size) {
              var self = this, $frame = $('#' + id);
              if ($frame.length) {
                  size = size && size > 0 ? self._getSize(size) : '';
                  $frame.data({'caption': caption, 'size': size});
              }
          },
          _setInitThumbAttr: function () {
              var self = this, data = self.previewCache.data, len = self.previewCache.count(), config,
                  caption, size, previewId;
              if (len === 0) {
                  return;
              }
              for (var i = 0; i < len; i++) {
                  config = data.config[i];
                  previewId = self.previewInitId + '-' + 'init_' + i;
                  caption = $h.ifSet('caption', config, $h.ifSet('filename', config));
                  size = $h.ifSet('size', config);
                  self._setThumbAttr(previewId, caption, size);
              }
          },
          _slugDefault: function (text) {
              return $h.isEmpty(text) ? '' : String(text).replace(/[\-\[\]\/\{}:;#%=\(\)\*\+\?\\\^\$\|<>&"']/g, '_');
          },
          _readFiles: function (files) {
              this.reader = new FileReader();
              var self = this, $el = self.$element, $preview = self.$preview, reader = self.reader,
                  $container = self.$previewContainer, $status = self.$previewStatus, msgLoading = self.msgLoading,
                  msgProgress = self.msgProgress, previewInitId = self.previewInitId, numFiles = files.length,
                  settings = self.fileTypeSettings, ctr = self.filestack.length, readFile,
                  fileTypes = self.allowedFileTypes, typLen = fileTypes ? fileTypes.length : 0,
                  fileExt = self.allowedFileExtensions, strExt = $h.isEmpty(fileExt) ? '' : fileExt.join(', '),
                  maxPreviewSize = self.maxFilePreviewSize && parseFloat(self.maxFilePreviewSize),
                  canPreview = $preview.length && (!maxPreviewSize || isNaN(maxPreviewSize)),
                  throwError = function (msg, file, previewId, index) {
                      var p1 = $.extend(true, {}, self._getOutData({}, {}, files), {id: previewId, index: index}),
                          p2 = {id: previewId, index: index, file: file, files: files}, $thumb, out;
                      self._previewDefault(file, previewId, true);
                      if (self.isAjaxUpload) {
                          self.addToStack(undefined);
                          setTimeout(function () {
                              readFile(index + 1);
                          }, 100);
                      } else {
                          numFiles = 0;
                      }
                      self._initFileActions();
                      $thumb = $('#' + previewId);
                      $thumb.find('.kv-file-upload').hide();
                      if (self.removeFromPreviewOnError) {
                          $thumb.remove();
                      }                  
                      self.isError = self.isAjaxUpload ? self._showUploadError(msg, p1) : self._showError(msg, p2);  
                      self._updateFileDetails(numFiles);
                  };
  
              self.loadedImages = [];
              self.totalImagesCount = 0;
  
              $.each(files, function (key, file) {
                  var func = self.fileTypeSettings.image;
                  if (func && func(file.type)) {
                      self.totalImagesCount++;
                  }
              });
              readFile = function (i) {
                  if ($h.isEmpty($el.attr('multiple'))) {
                      numFiles = 1;
                  }
                  if (i >= numFiles) {
                      if (self.isAjaxUpload && self.filestack.length > 0) {
                          self._raise('filebatchselected', [self.getFileStack()]);
                      } else {
                          self._raise('filebatchselected', [files]);
                      }
                      $container.removeClass('file-thumb-loading');
                      $status.html('');
                      return;
                  }
                  var node = ctr + i, previewId = previewInitId + "-" + node, isText, isImage, file = files[i], fSizeKB,
                      caption = file.name ? self.slug(file.name) : '', fileSize = (file.size || 0) / 1000, j, msg,
                      fileExtExpr = '', previewData = $h.objUrl.createObjectURL(file), typ, chk, typ1, typ2,
                      fileCount = 0, strTypes = '', func;
                  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}', $h.htmlEncode(file.name));
                      throwError(msg, file, previewId, i);
                      return;
                  }
                  if (!$h.isEmpty(fileExt)) {
                      fileExtExpr = new RegExp('\\.(' + fileExt.join('|') + ')$', 'i');
                  }
                  fSizeKB = fileSize.toFixed(2);
                  if (self.maxFileSize > 0 && fileSize > self.maxFileSize) {
                      msg = self.msgSizeTooLarge.setTokens({
                          'name': caption,
                          'size': fSizeKB,
                          'maxSize': self.maxFileSize
                      });
                      throwError(msg, file, previewId, i);
                      return;
                  }
                  if (self.minFileSize !== null && fileSize <= $h.getNum(self.minFileSize)) {
                      msg = self.msgSizeTooSmall.setTokens({
                          'name': caption,
                          'size': fSizeKB,
                          'minSize': self.minFileSize
                      });
                      throwError(msg, file, previewId, i);
                      return;
                  }
                  if (!$h.isEmpty(fileTypes) && $h.isArray(fileTypes)) {
                      for (j = 0; j < fileTypes.length; j += 1) {
                          typ = fileTypes[j];
                          func = settings[typ];
                          fileCount += !func || (typeof func !== 'function') ? 0 : (func(file.type, file.name) ? 1 : 0);
                      }
                      if (fileCount === 0) {
                          msg = self.msgInvalidFileType.setTokens({'name': caption, 'types': strTypes});
                          throwError(msg, file, previewId, i);
                          return;
                      }
                  }
                  if (fileCount === 0 && !$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);
                          return;
                      }
                  }
                  if (!self.showPreview) {
                      if (self.isAjaxUpload) {
                          self.addToStack(file);
                      }
                      setTimeout(function () {
                          readFile(i + 1);
                          self._updateFileDetails(numFiles);
                      }, 100);
                      self._raise('fileloaded', [file, previewId, i, reader]);
                      return;
                  }
                  if (!canPreview && fileSize > maxPreviewSize) {
                      self.addToStack(file);
                      $container.addClass('file-thumb-loading');
                      self._previewDefault(file, previewId);
                      self._initFileActions();
                      self._updateFileDetails(numFiles);
                      readFile(i + 1);
                      return;
                  }
                  if ($preview.length && FileReader !== undefined) {
                      $status.html(msgLoading.replace('{index}', i + 1).replace('{files}', numFiles));
                      $container.addClass('file-thumb-loading');
                      reader.onerror = function (evt) {
                          self._errorHandler(evt, caption);
                      };
                      reader.onload = function (theFile) {
                          self._previewFile(i, file, theFile, previewId, previewData);
                          self._initFileActions();
                      };
                      reader.onloadend = function () {
                          msg = msgProgress.setTokens({
                              'index': i + 1,
                              'files': numFiles,
                              'percent': 50,
                              'name': caption
                          });
                          setTimeout(function () {
                              $status.html(msg);
                              self._updateFileDetails(numFiles);
                              readFile(i + 1);
                          }, 100);
                          self._raise('fileloaded', [file, previewId, i, reader]);
                      };
                      reader.onprogress = function (data) {
                          if (data.lengthComputable) {
                              var fact = (data.loaded / data.total) * 100, progress = Math.ceil(fact);
                              msg = msgProgress.setTokens({
                                  'index': i + 1,
                                  'files': numFiles,
                                  'percent': progress,
                                  'name': caption
                              });
                              setTimeout(function () {
                                  $status.html(msg);
                              }, 100);
                          }
                      };
                      isText = settings.text;
                      isImage = settings.image;
  
                      if (isText(file.type, caption)) {
                          reader.readAsText(file, self.textEncoding);
                      } else {
                          if (isImage(file.type, caption)) {
                              reader.readAsDataURL(file);
                          } else {
                              reader.readAsArrayBuffer(file);
                          }
                      }
                  } else {
                      self._previewDefault(file, previewId);
                      setTimeout(function () {
                          readFile(i + 1);
                          self._updateFileDetails(numFiles);
                      }, 100);
                      self._raise('fileloaded', [file, previewId, i, reader]);
                  }
                  self.addToStack(file);
              };
  
              readFile(0);
              self._updateFileDetails(numFiles, false);
          },
          _updateFileDetails: function (numFiles) {
              var self = this, $el = self.$element, fileStack = self.getFileStack(),
                  name = ($h.isIE(9) && $h.findFileName($el.val())) ||
                      ($el[0].files[0] && $el[0].files[0].name) || (fileStack.length && fileStack[0].name) || '',
                  label = self.slug(name), n = self.isAjaxUpload ? fileStack.length : numFiles,
                  nFiles = self.previewCache.count() + n, log = n === 1 ? label : self._getMsgSelected(nFiles);
              if (self.isError) {
                  self.$previewContainer.removeClass('file-thumb-loading');
                  self.$previewStatus.html('');
                  self.$captionContainer.find('.kv-caption-icon').hide();
              } else {
                  self._showFileIcon();
              }
              self._setCaption(log, self.isError);
              self.$container.removeClass('file-input-new file-input-ajax-new');
              if (arguments.length === 1) {
                  self._raise('fileselect', [numFiles, label]);
              }
              if (self.previewCache.count()) {
                  self._initPreviewActions();
              }
          },
          _setThumbStatus: function ($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-loading');
              if (status === 'Success') {
                  $thumb.find('.file-drag-handle').remove();
              }
              $indicator.html(config[icon]);
              $indicator.attr('title', config[msg]);
              $thumb.addClass(css);
              if (status === 'Error' && !self.retryErrorUploads) {
                  $thumb.find('.kv-file-upload').attr('disabled', true);
              }
          },
          _setProgressCancelled: function () {
              var self = this;
              self._setProgress(101, self.$progress, self.msgCancelled);
          },
          _setProgress: function (p, $el, error) {
              var self = this, pct = Math.min(p, 100), out, pctLimit = self.progressUploadThreshold,
                  t = p <= 100 ? self.progressTemplate : self.progressCompleteTemplate,
                  template = pct < 100 ? self.progressTemplate : (error ? self.progressErrorTemplate : t);
              $el = $el || self.$progress;
              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 + '%')});
                  }
                  $el.html(out);
                  if (error) {
                      $el.find('[role="progressbar"]').html(error);
                  }
              }
          },
          _setFileDropZoneTitle: function () {
              var self = this, $zone = self.$container.find('.file-drop-zone'), title = self.dropZoneTitle, strFiles;
              if (self.isClickable) {
                  strFiles = $h.isEmpty(self.$element.attr('multiple')) ? self.fileSingle : self.filePlural;
                  title += self.dropZoneClickTitle.replace('{files}', strFiles);
              }
              $zone.find('.' + self.dropZoneTitleClass).remove();
              if (!self.isAjaxUpload || !self.showPreview || $zone.length === 0 || self.getFileStack().length > 0 || !self.dropZoneEnabled) {
                  return;
              }
              if ($zone.find($h.FRAMES).length === 0 && $h.isEmpty(self.defaultPreviewContent)) {
                  $zone.prepend('<div class="' + self.dropZoneTitleClass + '">' + title + '</div>');
              }
              self.$container.removeClass('file-input-new');
              $h.addCss(self.$container, 'file-input-ajax-new');
          },
          _setAsyncUploadStatus: function (previewId, pct, total) {
              var self = this, sum = 0;
              self._setProgress(pct, $('#' + previewId).find('.file-thumb-progress'));
              self.uploadStatus[previewId] = pct;
              $.each(self.uploadStatus, function (key, value) {
                  sum += value;
              });
              self._setProgress(Math.floor(sum / total));
          },
          _validateMinCount: function () {
              var self = this, len = self.isAjaxUpload ? self.getFileStack().length : self.$element.get(0).files.length;
              if (self.validateInitialCount && self.minFileCount > 0 && self._getFileCount(len - 1) < self.minFileCount) {
                  self._noFilesError({});
                  return false;
              }
              return true;
          },
          _getFileCount: function (fileCount) {
              var self = this, addCount = 0;
              if (self.validateInitialCount && !self.overwriteInitial) {
                  addCount = self.previewCache.count();
                  fileCount += addCount;
              }
              return fileCount;
          },
          _getFileId: function (file) {
              var self = this, custom = self.generateFileId, relativePath;
              if (typeof custom === 'function') {
                  return custom(file, event);
              }
              if (!file) {
                  return null;
              }
              /** @namespace file.webkitRelativePath */
              relativePath = String(file.webkitRelativePath || file.fileName || file.name || null);
              if (!relativePath) {
                  return null;
              }
              return (file.size + '-' + relativePath.replace(/[^0-9a-zA-Z_-]/img, ''));
          },
          _getFileName: function (file) {
              return file && file.name ? this.slug(file.name) : undefined;
          },
          _getFileIds: function (skipNull) {
              var self = this;
              return self.fileids.filter(function (n) {
                  return (skipNull ? n !== undefined : n !== undefined && n !== null);
              });
          },
          _getFileNames: function (skipNull) {
              var self = this;
              return self.filenames.filter(function (n) {
                  return (skipNull ? n !== undefined : n !== undefined && n !== null);
              });
          },
          _setPreviewError: function ($thumb, i, val, repeat) {
              var self = this;
              if (i !== undefined) {
                  self.updateStack(i, val);
              }
              if (self.removeFromPreviewOnError && !repeat) {
                  $thumb.remove();
                  return;
              } else {
                  self._setThumbStatus($thumb, 'Error');
              }
              self._refreshUploadButton($thumb, repeat);
          },
          _refreshUploadButton: function ($thumb, repeat) {
              var self = this, $btn = $thumb.find('.kv-file-upload'), cfg = self.fileActionSettings,
                  icon = cfg.uploadIcon, title = cfg.uploadTitle;
              if (!$btn.length) {
                  return;
              }
              if (repeat) {
                  icon = cfg.uploadRetryIcon;
                  title = cfg.uploadRetryTitle
              }
              $btn.attr('title', title).html(icon);
          },
          _checkDimensions: function (i, chk, $img, $thumb, fname, type, params) {
              var self = this, msg, dim, tag = chk === 'Small' ? 'min' : 'max', limit = self[tag + 'Image' + type],
                  $imgEl, isValid;
              if ($h.isEmpty(limit) || !$img.length) {
                  return;
              }
              $imgEl = $img[0];
              dim = (type === 'Width') ? $imgEl.naturalWidth || $imgEl.width : $imgEl.naturalHeight || $imgEl.height;
              isValid = chk === 'Small' ? dim >= limit : dim <= limit;
              if (isValid) {
                  return;
              }
              msg = self['msgImage' + type + chk].setTokens({'name': fname, 'size': limit});
              self._showUploadError(msg, params);
              self._setPreviewError($thumb, i, null);
          },
          _validateImage: function (previewId, fname, ftype, fsize, iData) {
              var self = this, $preview = self.$preview, params, w1, w2, $thumb = $preview.find("#" + previewId),
                  i = $thumb.attr('data-fileindex'), $img = $thumb.find('img'), exifObject;
              fname = fname || 'Untitled';
              $img.one('load', function () {
                  w1 = $thumb.width();
                  w2 = $preview.width();
                  if (w1 > w2) {
                      $img.css('width', '100%');
                  }
                  params = {ind: i, id: previewId};
                  self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Width', params);
                  self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Height', params);
                  if (!self.resizeImage) {
                      self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Width', params);
                      self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Height', params);
                  }
                  self._raise('fileimageloaded', [previewId]);
                  exifObject = window.piexif ? window.piexif.load(iData) : null;
                  self.loadedImages.push({
                      ind: i,
                      img: $img,
                      thumb: $thumb,
                      pid: previewId,
                      typ: ftype,
                      siz: fsize,
                      validated: false,
                      imgData: iData,
                      exifObj: exifObject
                  });
                  $thumb.data('exif', exifObject);
                  self._validateAllImages();
              }).one('error', function () {
                  self._raise('fileimageloaderror', [previewId]);
              }).each(function () {
                  if (this.complete) {
                      $(this).trigger('load');
                  } else {
                      if (this.error) {
                          $(this).trigger('error');
                      }
                  }
              });
          },
          _validateAllImages: function () {
              var self = this, i, counter = {val: 0}, numImgs = self.loadedImages.length, config,
                  fsize, minSize = self.resizeIfSizeMoreThan;
              if (numImgs !== self.totalImagesCount) {
                  return;
              }
              self._raise('fileimagesloaded');
              if (!self.resizeImage) {
                  return;
              }
              for (i = 0; i < self.loadedImages.length; i++) {
                  config = self.loadedImages[i];
                  if (config.validated) {
                      continue;
                  }
                  fsize = config.siz;
                  if (fsize && fsize > minSize * 1000) {
                      self._getResizedImage(config, counter, numImgs);
                  }
                  self.loadedImages[i].validated = true;
              }
          },
          _getResizedImage: function (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,
                  $thumb = config.thumb, throwError, msg, exifObj = config.exifObj, exifStr;
              throwError = function (msg, params, ev) {
                  if (self.isAjaxUpload) {
                      self._showUploadError(msg, params, ev);
                  } else {
                      self._showError(msg, params, ev);
                  }
                  self._setPreviewError($thumb, ind);
              };
              if (!self.filestack[ind] || !isValidImage || (width <= maxWidth && height <= maxHeight)) {
                  if (isValidImage && self.filestack[ind]) {
                      self._raise('fileimageresized', [pid, ind]);
                  }
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized');
                  }
                  if (!isValidImage) {
                      throwError(self.msgImageResizeError, {id: pid, 'index': ind}, '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 = $h.dataURI2Blob(dataURI);
                  self.filestack[ind] = blob;
                  self._raise('fileimageresized', [pid, ind]);
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized', [undefined, undefined]);
                  }
                  if (!(blob instanceof Blob)) {
                      throwError(self.msgImageResizeError, {id: pid, 'index': ind}, 'fileimageresizeerror');
                  }
              }
              catch (err) {
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized', [undefined, undefined]);
                  }
                  msg = self.msgImageResizeException.replace('{errors}', err.message);
                  throwError(msg, {id: pid, 'index': ind}, 'fileimageresizeexception');
              }
          },
          _initBrowse: function ($container) {
              var self = this;
              if (self.showBrowse) {
                  self.$btnFile = $container.find('.btn-file');
                  self.$btnFile.append(self.$element);
              } else {
                  self.$element.hide();
              }
          },
          _initCaption: function () {
              var self = this, cap = self.initialCaption || '';
              if (self.overwriteInitial || $h.isEmpty(cap)) {
                  self.$caption.html('');
                  return false;
              }
              self._setCaption(cap);
              return true;
          },
          _setCaption: function (content, isError) {
              var self = this, title, out, n, cap, stack = self.getFileStack();
              if (!self.$caption.length) {
                  return;
              }
              if (isError) {
                  title = $('<div>' + self.msgValidationError + '</div>').text();
                  n = stack.length;
                  if (n) {
                      cap = n === 1 && stack[0] ? self._getFileNames()[0] : self._getMsgSelected(n);
                  } else {
                      cap = self._getMsgSelected(self.msgNo);
                  }
                  out = '<span class="' + self.msgValidationErrorClass + '">' + self.msgValidationErrorIcon +
                      ($h.isEmpty(content) ? cap : content) + '</span>';
              } else {
                  if ($h.isEmpty(content)) {
                      return;
                  }
                  title = $('<div>' + content + '</div>').text();
                  out = self._getLayoutTemplate('fileIcon') + title;
              }
              self.$caption.html(out);
              self.$caption.attr('title', title);
              self.$captionContainer.find('.file-caption-ellipsis').attr('title', title);
          },
          _createContainer: function () {
              var self = this, attribs = {"class": 'file-input file-input-new' + (self.rtl ? ' kv-rtl' : '')},
                  $container = $(document.createElement("div")).attr(attribs).html(self._renderMain());
              self.$element.before($container);
              self._initBrowse($container);
              if (self.theme) {
                  $container.addClass('theme-' + self.theme);
              }
              return $container;
          },
          _refreshContainer: function () {
              var self = this, $container = self.$container;
              $container.before(self.$element);
              $container.html(self._renderMain());
              self._initBrowse($container);
          },
          _renderMain: function () {
              var self = this,
                  dropCss = (self.isAjaxUpload && self.dropZoneEnabled) ? ' file-drop-zone' : 'file-drop-disabled',
                  close = !self.showClose ? '' : self._getLayoutTemplate('close'),
                  preview = !self.showPreview ? '' : self._getLayoutTemplate('preview')
                      .setTokens({'class': self.previewClass, 'dropClass': dropCss}),
                  css = self.isDisabled ? self.captionClass + ' file-caption-disabled' : self.captionClass,
                  caption = self.captionTemplate.setTokens({'class': css + ' kv-fileinput-caption'});
              return self.mainTemplate.setTokens({
                  'class': self.mainClass + (!self.showBrowse && self.showCaption ? ' no-browse' : ''),
                  'preview': preview,
                  'close': close,
                  'caption': caption,
                  'upload': self._renderButton('upload'),
                  'remove': self._renderButton('remove'),
                  'cancel': self._renderButton('cancel'),
                  '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 'upload':
                      if (!self.showUpload) {
                          return '';
                      }
                      if (self.isAjaxUpload && !self.isDisabled) {
                          tmplt = self._getLayoutTemplate('btnLink').replace('{href}', self.uploadUrl);
                      } else {
                          btnType = 'submit';
                      }
                      break;
                  case 'browse':
                      if (!self.showBrowse) {
                          return '';
                      }
                      tmplt = self._getLayoutTemplate('btnBrowse');
                      break;
                  default:
                      return '';
              }
  
              css += type === 'browse' ? ' btn-file' : ' fileinput-' + type + ' fileinput-' + type + '-button';
              if (!$h.isEmpty(label)) {
                  label = ' <span class="' + self.buttonLabelClass + '">' + label + '</span>';
              }
              return tmplt.setTokens({
                  'type': btnType, 'css': css, 'title': title, 'status': status, 'icon': icon, 'label': label
              });
          },
          _renderThumbProgress: function () {
              var self = this;
              return '<div class="file-thumb-progress kv-hidden">' +
                  self.progressTemplate.setTokens({'percent': '0', 'status': self.msgUploadBegin}) +
                  '</div>';
          },
          _renderFileFooter: function (caption, size, width, isError) {
              var self = this, config = self.fileActionSettings, rem = config.showRemove, drg = config.showDrag,
                  upl = config.showUpload, zoom = config.showZoom, out,
                  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);
              if (self.isAjaxUpload) {
                  out = template.setTokens({
                      'actions': self._renderFileActions(upl, false, rem, zoom, drg, false, false, false),
                      'caption': caption,
                      'size': size,
                      'width': width,
                      'progress': self._renderThumbProgress(),
                      'indicator': indicator
                  });
              } else {
                  out = template.setTokens({
                      'actions': self._renderFileActions(false, false, false, zoom, drg, false, false, false),
                      'caption': caption,
                      'size': size,
                      'width': width,
                      'progress': '',
                      'indicator': indicator
                  });
              }
              out = $h.replaceTags(out, self.previewThumbTags);
              return out;
          },
          _renderFileActions: function (showUpl, showDwn, showDel, showZoom, showDrag, disabled, url, key, isInit, dUrl, dFile) {
              if (!showUpl && !showDwn && !showDel && !showZoom && !showDrag) {
                  return '';
              }
              var self = this, vUrl = url === false ? '' : ' data-url="' + url + '"',
                  vKey = key === false ? '' : ' data-key="' + key + '"', btnDelete = '', btnUpload = '', btnDownload = '',
                  btnZoom = '', btnDrag = '', css, template = self._getLayoutTemplate('actions'),
                  config = self.fileActionSettings,
                  otherButtons = self.otherActionButtons.setTokens({'dataKey': vKey, 'key': key}),
                  removeClass = disabled ? config.removeClass + ' disabled' : config.removeClass;
              if (showDel) {
                  btnDelete = self._getLayoutTemplate('actionDelete').setTokens({
                      'removeClass': removeClass,
                      'removeIcon': config.removeIcon,
                      'removeTitle': config.removeTitle,
                      'dataUrl': vUrl,
                      'dataKey': vKey,
                      'key': key
                  });
              }
              if (showUpl) {
                  btnUpload = self._getLayoutTemplate('actionUpload').setTokens({
                      'uploadClass': config.uploadClass,
                      'uploadIcon': config.uploadIcon,
                      'uploadTitle': config.uploadTitle
                  });
              }
              if (showDwn) {
                  btnDownload = self._getLayoutTemplate('actionDownload').setTokens({
                      'downloadClass': config.downloadClass,
                      'downloadIcon': config.downloadIcon,
                      'downloadTitle': config.downloadTitle,
                      'downloadUrl': dUrl || self.initialPreviewDownloadUrl
                  });
                  btnDownload = btnDownload.setTokens({'filename': dFile, 'key': key});
              }
              if (showZoom) {
                  btnZoom = self._getLayoutTemplate('actionZoom').setTokens({
                      'zoomClass': config.zoomClass,
                      'zoomIcon': config.zoomIcon,
                      'zoomTitle': config.zoomTitle
                  });
              }
              if (showDrag && isInit) {
                  css = 'drag-handle-init ' + config.dragClass;
                  btnDrag = self._getLayoutTemplate('actionDrag').setTokens({
                      'dragClass': css,
                      'dragTitle': config.dragTitle,
                      'dragIcon': config.dragIcon
                  });
              }
              return template.setTokens({
                  'delete': btnDelete,
                  'upload': btnUpload,
                  'download': btnDownload,
                  'zoom': btnZoom,
                  'drag': btnDrag,
                  'other': otherButtons
              });
          },
          _browse: function (e) {
              var self = this;
              self._raise('filebrowse');
              if (e && e.isDefaultPrevented()) {
                  return;
              }
              if (self.isError && !self.isAjaxUpload) {
                  self.clear();
              }
              self.$captionContainer.focus();
          },
          _filterDuplicate: function (file, files, fileIds) {
              var self = this, fileId = self._getFileId(file);
              if (fileId && fileIds && fileIds.indexOf(fileId) > -1) {
                  return;
              }
              if (!fileIds) {
                  fileIds = [];
              }
              files.push(file);
              fileIds.push(fileId);
          },
          _change: function (e) {
              var self = this, $el = self.$element;
              if (!self.isAjaxUpload && $h.isEmpty($el.val()) && self.fileInputCleared) { // IE 11 fix
                  self.fileInputCleared = false;
                  return;
              }
              self.fileInputCleared = false;
              var tfiles = [], msg, total, isDragDrop = arguments.length > 1, isAjaxUpload = self.isAjaxUpload, n, len,
                  files = isDragDrop ? e.originalEvent.dataTransfer.files : $el.get(0).files, ctr = self.filestack.length,
                  isSingleUpload = $h.isEmpty($el.attr('multiple')), flagSingle = (isSingleUpload && ctr > 0),
                  folders = 0, fileIds = self._getFileIds(), throwError = function (mesg, file, previewId, index) {
                      var p1 = $.extend(true, {}, self._getOutData({}, {}, files), {id: previewId, index: index}),
                          p2 = {id: previewId, index: index, file: file, files: files};
                      return self.isAjaxUpload ? self._showUploadError(mesg, p1) : self._showError(mesg, p2);
                  };
              self.reader = null;
              self._resetUpload();
              self._hideFileIcon();
              if (self.isAjaxUpload) {
                  self.$container.find('.file-drop-zone .' + self.dropZoneTitleClass).remove();
              }
              if (isDragDrop) {
                  $.each(files, function (i, f) {
                      if (f && !f.type && f.size !== undefined && f.size % 4096 === 0) {
                          folders++;
                      } else {
                          self._filterDuplicate(f, tfiles, fileIds);
                      }
                  });
              } else {
                  if (e.target && e.target.files === undefined) {
                      files = e.target.value ? [{name: e.target.value.replace(/^.+\\/, '')}] : [];
                  } else {
                      files = e.target.files || {};
                  }
                  if (isAjaxUpload) {
                      $.each(files, function (i, f) {
                          self._filterDuplicate(f, tfiles, fileIds);
                      });
                  } else {
                      tfiles = files;
                  }
              }
              if ($h.isEmpty(tfiles) || tfiles.length === 0) {
                  if (!isAjaxUpload) {
                      self.clear();
                  }
                  self._showFolderError(folders);
                  self._raise('fileselectnone');
                  return;
              }
              self._resetErrors();
              len = tfiles.length;
              total = self._getFileCount(self.isAjaxUpload ? (self.getFileStack().length + len) : len);
              if (self.maxFileCount > 0 && total > self.maxFileCount) {
                  if (!self.autoReplace || len > self.maxFileCount) {
                      n = (self.autoReplace && len > self.maxFileCount) ? len : total;
                      msg = self.msgFilesTooMany.replace('{m}', self.maxFileCount).replace('{n}', n);
                      self.isError = throwError(msg, null, null, null);
                      self.$captionContainer.find('.kv-caption-icon').hide();
                      self._setCaption('', true);
                      self.$container.removeClass('file-input-new file-input-ajax-new');
                      return;
                  }
                  if (total > self.maxFileCount) {
                      self._resetPreviewThumbs(isAjaxUpload);
                  }
              } else {
                  if (!isAjaxUpload || flagSingle) {
                      self._resetPreviewThumbs(false);
                      if (flagSingle) {
                          self.clearStack();
                      }
                  } else {
                      if (isAjaxUpload && ctr === 0 && (!self.previewCache.count() || self.overwriteInitial)) {
                          self._resetPreviewThumbs(true);
                      }
                  }
              }
              if (self.isPreviewable) {
                  self._readFiles(tfiles);
              } else {
                  self._updateFileDetails(1);
              }
              self._showFolderError(folders);
          },
          _abort: function (params) {
              var self = this, data;
              if (self.ajaxAborted && typeof self.ajaxAborted === "object" && self.ajaxAborted.message !== undefined) {
                  data = $.extend(true, {}, self._getOutData(), params);
                  data.abortData = self.ajaxAborted.data || {};
                  data.abortMessage = self.ajaxAborted.message;
                  self._setProgress(101, self.$progress, self.msgCancelled);
                  self._showUploadError(self.ajaxAborted.message, data, 'filecustomerror');
                  self.cancel();
                  return true;
              }
              return false;
          },
          _resetFileStack: function () {
              var self = this, i = 0, newstack = [], newnames = [], newids = [];
              self._getThumbs().each(function () {
                  var $thumb = $(this), ind = $thumb.attr('data-fileindex'), file = self.filestack[ind],
                      pid = $thumb.attr('id'), newId;
                  if (ind === '-1' || ind === -1) {
                      return;
                  }
                  if (file !== undefined) {
                      newstack[i] = file;
                      newnames[i] = self._getFileName(file);
                      newids[i] = self._getFileId(file);
                      $thumb.attr({'id': self.previewInitId + '-' + i, 'data-fileindex': i});
                      i++;
                  } else {
                      newId = 'uploaded-' + $h.uniqId();
                      $thumb.attr({'id': newId, 'data-fileindex': '-1'});
                      self.$preview.find('#zoom-' + pid).attr('id', 'zoom-' + newId);
                  }
              });
              self.filestack = newstack;
              self.filenames = newnames;
              self.fileids = newids;
          },
          _isFileSelectionValid: function (cnt) {
              var self = this;
              cnt = cnt || 0;
              if (self.required && !self.getFilesCount()) {
                  self.$errorContainer.html('');
                  self._showUploadError(self.msgFileRequired);
                  return false;
              }
              if (self.minFileCount > 0 && self._getFileCount(cnt) < self.minFileCount) {
                  self._noFilesError({});
                  return false;
              }
              return true;
          },
          clearStack: function () {
              var self = this;
              self.filestack = [];
              self.filenames = [];
              self.fileids = [];
              return self.$element;
          },
          updateStack: function (i, file) {
              var self = this;
              self.filestack[i] = file;
              self.filenames[i] = self._getFileName(file);
              self.fileids[i] = file && self._getFileId(file) || null;
              return self.$element;
          },
          addToStack: function (file) {
              var self = this;
              self.filestack.push(file);
              self.filenames.push(self._getFileName(file));
              self.fileids.push(self._getFileId(file));
              return self.$element;
          },
          getFileStack: function (skipNull) {
              var self = this;
              return self.filestack.filter(function (n) {
                  return (skipNull ? n !== undefined : n !== undefined && n !== null);
              });
          },
          getFilesCount: function () {
              var self = this, len = self.isAjaxUpload ? self.getFileStack().length : self.$element.get(0).files.length;
              return self._getFileCount(len);
          },
          lock: function () {
              var self = this;
              self._resetErrors();
              self.disable();
              if (self.showRemove) {
                  self.$container.find('.fileinput-remove').hide();
              }
              if (self.showCancel) {
                  self.$container.find('.fileinput-cancel').show();
              }
              self._raise('filelock', [self.filestack, self._getExtraData()]);
              return self.$element;
          },
          unlock: function (reset) {
              var self = this;
              if (reset === undefined) {
                  reset = true;
              }
              self.enable();
              if (self.showCancel) {
                  self.$container.find('.fileinput-cancel').hide();
              }
              if (self.showRemove) {
                  self.$container.find('.fileinput-remove').show();
              }
              if (reset) {
                  self._resetFileStack();
              }
              self._raise('fileunlock', [self.filestack, self._getExtraData()]);
              return self.$element;
          },
          cancel: function () {
              var self = this, xhr = self.ajaxRequests, len = xhr.length, i;
              if (len > 0) {
                  for (i = 0; i < len; i += 1) {
                      self.cancelling = true;
                      xhr[i].abort();
                  }
              }
              self._setProgressCancelled();
              self._getThumbs().each(function () {
                  var $thumb = $(this), ind = $thumb.attr('data-fileindex');
                  $thumb.removeClass('file-uploading');
                  if (self.filestack[ind] !== undefined) {
                      $thumb.find('.kv-file-upload').removeClass('disabled').removeAttr('disabled');
                      $thumb.find('.kv-file-remove').removeClass('disabled').removeAttr('disabled');
                  }
                  self.unlock();
              });
              return self.$element;
          },
          clear: function () {
              var self = this, cap;
              if (!self._raise('fileclear')) {
                  return;
              }
              self.$btnUpload.removeAttr('disabled');
              self._getThumbs().find('video,audio,img').each(function () {
                  $h.cleanMemory($(this));
              });
              self._resetUpload();
              self.clearStack();
              self._clearFileInput();
              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.html(cap);
                  self.$caption.attr('title', '');
                  $h.addCss(self.$container, 'file-input-new');
                  self._validateDefaultPreview();
              }
              if (self.$container.find($h.FRAMES).length === 0) {
                  if (!self._initCaption()) {
                      self.$captionContainer.find('.kv-caption-icon').hide();
                  }
              }
              self._hideFileIcon();
              self._raise('filecleared');
              self.$captionContainer.focus();
              self._setFileDropZoneTitle();
              return self.$element;
          },
          reset: function () {
              var self = this;
              if (!self._raise('filereset')) {
                  return;
              }
              self._resetPreview();
              self.$container.find('.fileinput-filename').text('');
              $h.addCss(self.$container, 'file-input-new');
              if (self.getFrames().length || self.isAjaxUpload && self.dropZoneEnabled) {
                  self.$container.removeClass('file-input-new');
              }
              self.clearStack();
              self.formdata = {};
              self._setFileDropZoneTitle();
              return self.$element;
          },
          disable: function () {
              var self = this;
              self.isDisabled = true;
              self._raise('filedisabled');
              self.$element.attr('disabled', 'disabled');
              self.$container.find(".kv-fileinput-caption").addClass("file-caption-disabled");
              self.$container.find(".fileinput-remove, .fileinput-upload, .file-preview-frame button")
                  .attr("disabled", true);
              $h.addCss(self.$container.find('.btn-file'), 'disabled');
              self._initDragDrop();
              return self.$element;
          },
          enable: function () {
              var self = this;
              self.isDisabled = false;
              self._raise('fileenabled');
              self.$element.removeAttr('disabled');
              self.$container.find(".kv-fileinput-caption").removeClass("file-caption-disabled");
              self.$container.find(".fileinput-remove, .fileinput-upload, .file-preview-frame button")
                  .removeAttr("disabled");
              self.$container.find('.btn-file').removeClass('disabled');
              self._initDragDrop();
              return self.$element;
          },
          upload: function () {
              var self = this, totLen = self.getFileStack().length, i, outData, len,
                  hasExtraData = !$.isEmptyObject(self._getExtraData());
              if (!self.isAjaxUpload || self.isDisabled || !self._isFileSelectionValid(totLen)) {
                  return;
              }
              self._resetUpload();
              if (totLen === 0 && !hasExtraData) {
                  self._showUploadError(self.msgUploadEmpty);
                  return;
              }
              self.$progress.show();
              self.uploadCount = 0;
              self.uploadStatus = {};
              self.uploadLog = [];
              self.lock();
              self._setProgress(2);
              if (totLen === 0 && hasExtraData) {
                  self._uploadExtraOnly();
                  return;
              }
              len = self.filestack.length;
              self.hasInitData = false;
              if (self.uploadAsync) {
                  outData = self._getOutData();
                  self._raise('filebatchpreupload', [outData]);
                  self.fileBatchCompleted = false;
                  self.uploadCache = {content: [], config: [], tags: [], append: true};
                  self.uploadAsyncCount = self.getFileStack().length;
                  for (i = 0; i < len; i++) {
                      self.uploadCache.content[i] = null;
                      self.uploadCache.config[i] = null;
                      self.uploadCache.tags[i] = null;
                  }
                  self.$preview.find('.file-preview-initial').removeClass($h.SORT_CSS);
                  self._initSortable();
                  self.cacheInitialPreview = self.getPreview();
  
                  for (i = 0; i < len; i++) {
                      if (self.filestack[i]) {
                          self._uploadSingle(i, true);
                      }
                  }
                  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, triggerChange) {
              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();
              if (triggerChange) {
                  $el.trigger('change' + self.namespace);
              }
              return $el;
          },
          zoom: function (frameId) {
              var self = this, $frame = self._getFrame(frameId), $modal = self.$modal;
              if (!$frame) {
                  return;
              }
              $h.initModal($modal);
              $modal.html(self._getModalContent());
              self._setZoomContent($frame);
              $modal.modal('show');
              self._initZoomButtons();
          },
          getExif: function (frameId) {
              var self = this, $frame = self._getFrame(frameId);
              return $frame && $frame.data('exif') || null;
          },
          getFrames: function (cssFilter) {
              var self = this;
              cssFilter = cssFilter || '';
              return self.$preview.find($h.FRAMES + cssFilter);
          },
          getPreview: function () {
              var self = this;
              return {
                  content: self.initialPreview,
                  config: self.initialPreviewConfig,
                  tags: self.initialPreviewThumbTags
              };
          }
      };
  
      $.fn.fileinput = function (option) {
          if (!$h.hasFileAPISupport() && !$h.isIE(9)) {
              return;
          }
          var args = Array.apply(null, arguments), retvals = [];
          args.shift();
          this.each(function () {
              var self = $(this), data = self.data('fileinput'), options = typeof option === 'object' && option,
                  theme = options.theme || self.data('theme'), l = {}, t = {},
                  lang = options.language || self.data('language') || $.fn.fileinput.defaults.language || 'en', opt;
              if (!data) {
                  if (theme) {
                      t = $.fn.fileinputThemes[theme] || {};
                  }
                  if (lang !== 'en' && !$h.isEmpty($.fn.fileinputLocales[lang])) {
                      l = $.fn.fileinputLocales[lang] || {};
                  }
                  opt = $.extend(true, {}, $.fn.fileinput.defaults, t, $.fn.fileinputLocales.en, l, options, self.data());
                  data = new FileInput(this, opt);
                  self.data('fileinput', data);
              }
  
              if (typeof option === 'string') {
                  retvals.push(data[option].apply(data, args));
              }
          });
          switch (retvals.length) {
              case 0:
                  return this;
              case 1:
                  return retvals[0];
              default:
                  return retvals;
          }
      };
  
      $.fn.fileinput.defaults = {
          language: 'en',
          showCaption: true,
          showBrowse: true,
          showPreview: true,
          showRemove: true,
          showUpload: true,
          showCancel: true,
          showClose: true,
          showUploadedThumbs: true,
          browseOnZoneClick: false,
          autoReplace: false,
          autoOrientImage: true, // for JPEG images based on EXIF orientation tag
          required: false,
          rtl: false,
          hideThumbnailContent: false,
          generateFileId: null,
          previewClass: '',
          captionClass: '',
          frameClass: 'krajee-default',
          mainClass: 'file-caption-main',
          mainTemplate: null,
          purifyHtml: true,
          fileSizeGetter: null,
          initialCaption: '',
          initialPreview: [],
          initialPreviewDelimiter: '*$$*',
          initialPreviewAsData: false,
          initialPreviewFileType: 'image',
          initialPreviewConfig: [],
          initialPreviewThumbTags: [],
          previewThumbTags: {},
          initialPreviewShowDelete: true,
          initialPreviewDownloadUrl: '',
          removeFromPreviewOnError: false,
          deleteUrl: '',
          deleteExtraData: {},
          overwriteInitial: true,
          previewZoomButtonIcons: {
              prev: '<i class="glyphicon glyphicon-triangle-left"></i>',
              next: '<i class="glyphicon glyphicon-triangle-right"></i>',
              toggleheader: '<i class="glyphicon glyphicon-resize-vertical"></i>',
              fullscreen: '<i class="glyphicon glyphicon-fullscreen"></i>',
              borderless: '<i class="glyphicon glyphicon-resize-full"></i>',
              close: '<i class="glyphicon glyphicon-remove"></i>'
          },
          previewZoomButtonClasses: {
              prev: 'btn btn-navigate',
              next: 'btn btn-navigate',
              toggleheader: 'btn btn-sm btn-default btn-outline-secondary',
              fullscreen: 'btn btn-sm btn-default btn-outline-secondary',
              borderless: 'btn btn-sm btn-default btn-outline-secondary',
              close: 'btn btn-sm btn-default btn-outline-secondary'
          },
          preferIconicPreview: false,
          preferIconicZoomPreview: false,
          allowedPreviewTypes: undefined,
          allowedPreviewMimeTypes: null,
          allowedFileTypes: null,
          allowedFileExtensions: null,
          defaultPreviewContent: null,
          customLayoutTags: {},
          customPreviewTags: {},
          previewFileIcon: '<i class="glyphicon glyphicon-file"></i>',
          previewFileIconClass: 'file-other-icon',
          previewFileIconSettings: {},
          previewFileExtSettings: {},
          buttonLabelClass: 'hidden-xs',
          browseIcon: '<i class="glyphicon glyphicon-folder-open"></i>&nbsp;',
          browseClass: 'btn btn-primary',
          removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
          removeClass: 'btn btn-default btn-secondary',
          cancelIcon: '<i class="glyphicon glyphicon-ban-circle"></i>',
          cancelClass: 'btn btn-default btn-secondary',
          uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
          uploadClass: 'btn btn-default btn-secondary',
          uploadUrl: null,
          uploadUrlThumb: null,
          uploadAsync: true,
          uploadExtraData: {},
          zoomModalHeight: 480,
          minImageWidth: null,
          minImageHeight: null,
          maxImageWidth: null,
          maxImageHeight: null,
          resizeImage: false,
          resizePreference: 'width',
          resizeQuality: 0.92,
          resizeDefaultImageType: 'image/jpeg',
          resizeIfSizeMoreThan: 0, // in KB
          minFileSize: 0,
          maxFileSize: 0,
          maxFilePreviewSize: 25600, // 25 MB
          minFileCount: 0,
          maxFileCount: 0,
          validateInitialCount: false,
          msgValidationErrorClass: 'text-danger',
          msgValidationErrorIcon: '<i class="glyphicon glyphicon-exclamation-sign"></i> ',
          msgErrorClass: 'file-error-message',
          progressThumbClass: "progress-bar bg-success progress-bar-success progress-bar-striped active",
          progressClass: "progress-bar bg-success progress-bar-success progress-bar-striped active",
          progressCompleteClass: "progress-bar bg-success progress-bar-success",
          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: '<button class="close kv-error-close">&times;</button>',
          slugCallback: null,
          dropZoneEnabled: true,
          dropZoneTitleClass: 'file-drop-zone-title',
          fileActionSettings: {},
          otherActionButtons: '',
          textEncoding: 'UTF-8',
          ajaxSettings: {},
          ajaxDeleteSettings: {},
          showAjaxErrorDetails: true,
          mergeAjaxCallbacks: false,
          mergeAjaxDeleteCallbacks: false,
          retryErrorUploads: true
      };
  
      $.fn.fileinputLocales.en = {
          fileSingle: 'file',
          filePlural: 'files',
          browseLabel: 'Browse &hellip;',
          removeLabel: 'Remove',
          removeTitle: 'Clear selected files',
          cancelLabel: 'Cancel',
          cancelTitle: 'Abort ongoing upload',
          uploadLabel: 'Upload',
          uploadTitle: 'Upload selected files',
          msgNo: 'No',
          msgNoFilesSelected: 'No files selected',
          msgCancelled: 'Cancelled',
          msgZoomModalHeading: 'Detailed Preview',
          msgFileRequired: 'You must select a file to upload.',
          msgSizeTooSmall: 'File "{name}" (<b>{size} KB</b>) is too small and must be larger than <b>{minSize} KB</b>.',
          msgSizeTooLarge: 'File "{name}" (<b>{size} KB</b>) exceeds maximum allowed upload size of <b>{maxSize} KB</b>.',
          msgFilesTooLess: 'You must select at least <b>{n}</b> {files} to upload.',
          msgFilesTooMany: 'Number of files selected for upload <b>({n})</b> exceeds maximum allowed limit of <b>{m}</b>.',
          msgFileNotFound: 'File "{name}" not found!',
          msgFileSecured: 'Security restrictions prevent reading the file "{name}".',
          msgFileNotReadable: 'File "{name}" is not readable.',
          msgFilePreviewAborted: 'File preview aborted for "{name}".',
          msgFilePreviewError: 'An error occurred while reading the file "{name}".',
          msgInvalidFileName: 'Invalid or unsupported characters in file name "{name}".',
          msgInvalidFileType: 'Invalid type for file "{name}". Only "{types}" files are supported.',
          msgInvalidFileExtension: 'Invalid extension for file "{name}". Only "{extensions}" files are supported.',
          msgFileTypes: {
              'image': 'image',
              'html': 'HTML',
              'text': 'text',
              'video': 'video',
              'audio': 'audio',
              'flash': 'flash',
              'pdf': 'PDF',
              'object': 'object'
          },
          msgUploadAborted: 'The file upload was aborted',
          msgUploadThreshold: 'Processing...',
          msgUploadBegin: 'Initializing...',
          msgUploadEnd: 'Done',
          msgUploadEmpty: 'No valid data available for upload.',
          msgUploadError: 'Error',
          msgValidationError: 'Validation Error',
          msgLoading: 'Loading file {index} of {files} &hellip;',
          msgProgress: 'Loading file {index} of {files} - {name} - {percent}% completed.',
          msgSelected: '{n} {files} selected',
          msgFoldersNotAllowed: 'Drag & drop files only! {n} folder(s) dropped were skipped.',
          msgImageWidthSmall: 'Width of image file "{name}" must be at least {size} px.',
          msgImageHeightSmall: 'Height of image file "{name}" must be at least {size} px.',
          msgImageWidthLarge: 'Width of image file "{name}" cannot exceed {size} px.',
          msgImageHeightLarge: 'Height of image file "{name}" cannot exceed {size} px.',
          msgImageResizeError: 'Could not get the image dimensions to resize.',
          msgImageResizeException: 'Error while resizing the image.<pre>{errors}</pre>',
          msgAjaxError: 'Something went wrong with the {operation} operation. Please try again later!',
          msgAjaxProgressError: '{operation} failed',
          ajaxOperations: {
              deleteThumb: 'file delete',
              uploadThumb: 'file upload',
              uploadBatch: 'batch file upload',
              uploadExtra: 'form data upload'
          },
          dropZoneTitle: 'Drag & drop files here &hellip;',
          dropZoneClickTitle: '<br>(or click to select {files})',
          previewZoomButtonTitles: {
              prev: 'View previous file',
              next: 'View next file',
              toggleheader: 'Toggle header',
              fullscreen: 'Toggle full screen',
              borderless: 'Toggle borderless mode',
              close: 'Close detailed preview'
          }
      };
  
      $.fn.fileinput.Constructor = FileInput;
  
      /**
       * Convert automatically file inputs with class 'file' into a bootstrap fileinput control.
       */
      $(document).ready(function () {
          var $input = $('input.file[type=file]');
          if ($input.length) {
              $input.fileinput();
          }
      });
  }));