text: /*!
   * bootstrap-fileinput v5.1.6
   * http://plugins.krajee.com/file-input
   *
   * Author: Kartik Visweswaran
   * Copyright: 2014 - 2021, Kartik Visweswaran, Krajee.com
   *
   * Licensed under the BSD-3-Clause
   * https://github.com/kartik-v/bootstrap-fileinput/blob/master/LICENSE.md
   */
  (function (factory) {
      'use strict';
      if (typeof define === 'function' && define.amd) {
          define(['jquery'], factory);
      } else {
          if (typeof module === 'object' && module.exports) {
              //noinspection NpmUsedModulesInstalled
              module.exports = factory(require('jquery'));
          } else {
              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;
      };
  
      if (!Array.prototype.flatMap) { // polyfill flatMap
          Array.prototype.flatMap = function (lambda) {
              return [].concat(this.map(lambda));
          };
      }
  
      var $h, FileInput;
  
      // fileinput helper object for all global variables and internal helper methods
      $h = {
          FRAMES: '.kv-preview-thumb',
          SORT_CSS: 'file-sortable',
          INIT_FLAG: 'init-',
          OBJECT_PARAMS: '<param name="controller" value="true" />\n' +
              '<param name="allowFullScreen" value="true" />\n' +
              '<param name="allowScriptAccess" value="always" />\n' +
              '<param name="autoPlay" value="false" />\n' +
              '<param name="autoStart" value="false" />\n' +
              '<param name="quality" value="high" />\n',
          DEFAULT_PREVIEW: '<div class="file-preview-other">\n' +
              '<span class="{previewFileIconClass}">{previewFileIcon}</span>\n' +
              '</div>',
          MODAL_ID: 'kvFileinputModal',
          MODAL_EVENTS: ['show', 'shown', 'hide', 'hidden', 'loaded'],
          logMessages: {
              ajaxError: '{status}: {error}. Error Details: {text}.',
              badDroppedFiles: 'Error scanning dropped files!',
              badExifParser: 'Error loading the piexif.js library. {details}',
              badInputType: 'The input "type" must be set to "file" for initializing the "bootstrap-fileinput" plugin.',
              exifWarning: 'To avoid this warning, either set "autoOrientImage" to "false" OR ensure you have loaded ' +
                  'the "piexif.js" library correctly on your page before the "fileinput.js" script.',
              invalidChunkSize: 'Invalid upload chunk size: "{chunkSize}". Resumable uploads are disabled.',
              invalidThumb: 'Invalid thumb frame with id: "{id}".',
              noResumableSupport: 'The browser does not support resumable or chunk uploads.',
              noUploadUrl: 'The "uploadUrl" is not set. Ajax uploads and resumable uploads have been disabled.',
              retryStatus: 'Retrying upload for chunk # {chunk} for {filename}... retry # {retry}.',
              chunkQueueError: 'Could not push task to ajax pool for chunk index # {index}.',
              resumableMaxRetriesReached: 'Maximum resumable ajax retries ({n}) reached.',
              resumableRetryError: 'Could not retry the resumable request (try # {n})... aborting.',
              resumableAborting: 'Aborting / cancelling the resumable request.',
              resumableRequestError: 'Error processing resumable request. {msg}'
  
          },
          objUrl: window.URL || window.webkitURL,
          now: function () {
              return new Date().getTime();
          },
          round: function (num) {
              num = parseFloat(num);
              return isNaN(num) ? 0 : Math.floor(Math.round(num));
          },
          getArray: function (obj) {
              var i, arr = [], len = obj && obj.length || 0;
              for (i = 0; i < len; i++) {
                  arr.push(obj[i]);
              }
              return arr;
          },
          getFileRelativePath: function (file) {
              /** @namespace file.relativePath */
              /** @namespace file.webkitRelativePath */
              return String(file.newPath || file.relativePath || file.webkitRelativePath || $h.getFileName(file) || null);
  
          },
          getFileId: function (file, generateFileId) {
              var relativePath = $h.getFileRelativePath(file);
              if (typeof generateFileId === 'function') {
                  return generateFileId(file);
              }
              if (!file) {
                  return null;
              }
              if (!relativePath) {
                  return null;
              }
              return (file.size + '_' + encodeURIComponent(relativePath).replace(/%/g, '_'));
          },
          getFrameSelector: function (id, selector) {
              selector = selector || '';
              return '[id="' + id + '"]' + selector;
          },
          getZoomSelector: function (id, selector) {
              return $h.getFrameSelector('zoom-' + id, selector);
          },
          getFrameElement: function ($element, id, selector) {
              return $element.find($h.getFrameSelector(id, selector));
          },
          getZoomElement: function ($element, id, selector) {
              return $element.find($h.getZoomSelector(id, selector));
          },
          getElapsed: function (seconds) {
              var delta = seconds, out = '', result = {}, structure = {
                  year: 31536000,
                  month: 2592000,
                  week: 604800, // uncomment row to ignore
                  day: 86400,   // feel free to add your own row
                  hour: 3600,
                  minute: 60,
                  second: 1
              };
              $h.getObjectKeys(structure).forEach(function (key) {
                  result[key] = Math.floor(delta / structure[key]);
                  delta -= result[key] * structure[key];
              });
              $.each(result, function (key, value) {
                  if (value > 0) {
                      out += (out ? ' ' : '') + value + key.substring(0, 1);
                  }
              });
              return out;
          },
          debounce: function (func, delay) {
              var inDebounce;
              return function () {
                  var args = arguments, context = this;
                  clearTimeout(inDebounce);
                  inDebounce = setTimeout(function () {
                      func.apply(context, args);
                  }, delay);
              };
          },
          stopEvent: function (e) {
              e.stopPropagation();
              e.preventDefault();
          },
          getFileName: function (file) {
              /** @namespace file.fileName */
              return file ? (file.fileName || file.name || '') : ''; // some confusion in different versions of Firefox
          },
          createObjectURL: function (data) {
              if ($h.objUrl && $h.objUrl.createObjectURL && data) {
                  return $h.objUrl.createObjectURL(data);
              }
              return '';
          },
          revokeObjectURL: function (data) {
              if ($h.objUrl && $h.objUrl.revokeObjectURL && data) {
                  $h.objUrl.revokeObjectURL(data);
              }
          },
          compare: function (input, str, exact) {
              return input !== undefined && (exact ? input === str : input.match(str));
          },
          isIE: function (ver) {
              var div, status;
              // check for IE versions < 11
              if (navigator.appName !== 'Microsoft Internet Explorer') {
                  return false;
              }
              if (ver === 10) {
                  return new RegExp('msie\\s' + ver, 'i').test(navigator.userAgent);
              }
              div = document.createElement('div');
              div.innerHTML = '<!--[if IE ' + ver + ']> <i></i> <![endif]-->';
              status = div.getElementsByTagName('i').length;
              document.body.appendChild(div);
              div.parentNode.removeChild(div);
              return status;
          },
          canOrientImage: function ($el) {
              var $img = $(document.createElement('img')).css({width: '1px', height: '1px'}).insertAfter($el),
                  flag = $img.css('image-orientation');
              $img.remove();
              return !!flag;
          },
          canAssignFilesToInput: function () {
              var input = document.createElement('input');
              try {
                  input.type = 'file';
                  input.files = null;
                  return true;
              } catch (err) {
                  return false;
              }
          },
          getDragDropFolders: function (items) {
              var i, item, len = items ? items.length : 0, folders = 0;
              if (len > 0 && items[0].webkitGetAsEntry()) {
                  for (i = 0; i < len; i++) {
                      item = items[i].webkitGetAsEntry();
                      if (item && item.isDirectory) {
                          folders++;
                      }
                  }
              }
              return folders;
          },
          initModal: function ($modal) {
              var $body = $('body');
              if ($body.length) {
                  $modal.appendTo($body);
              }
          },
          isFunction: function (v) {
              return typeof v === 'function';
          },
          isEmpty: function (value, trim) {
              return value === undefined || value === null || (!$h.isFunction(
                  value) && (value.length === 0 || (trim && $.trim(value) === '')));
          },
          isArray: function (a) {
              return Array.isArray(a) || Object.prototype.toString.call(a) === '[object Array]';
          },
          ifSet: function (needle, haystack, def) {
              def = def || '';
              return (haystack && typeof haystack === 'object' && needle in haystack) ? haystack[needle] : def;
          },
          cleanArray: function (arr) {
              if (!(arr instanceof Array)) {
                  arr = [];
              }
              return arr.filter(function (e) {
                  return (e !== undefined && e !== null);
              });
          },
          spliceArray: function (arr, index, reverseOrder) {
              var i, j = 0, out = [], newArr;
              if (!(arr instanceof Array)) {
                  return [];
              }
              newArr = $.extend(true, [], arr);
              if (reverseOrder) {
                  newArr.reverse();
              }
              for (i = 0; i < newArr.length; i++) {
                  if (i !== index) {
                      out[j] = newArr[i];
                      j++;
                  }
              }
              if (reverseOrder) {
                  out.reverse();
              }
              return out;
          },
          getNum: function (num, def) {
              def = def || 0;
              if (typeof num === 'number') {
                  return num;
              }
              if (typeof num === 'string') {
                  num = parseFloat(num);
              }
              return isNaN(num) ? def : num;
          },
          hasFileAPISupport: function () {
              return !!(window.File && window.FileReader);
          },
          hasDragDropSupport: function () {
              var div = document.createElement('div');
              /** @namespace div.draggable */
              /** @namespace div.ondragstart */
              /** @namespace div.ondrop */
              return !$h.isIE(9) &&
                  (div.draggable !== undefined || (div.ondragstart !== undefined && div.ondrop !== undefined));
          },
          hasFileUploadSupport: function () {
              return $h.hasFileAPISupport() && window.FormData;
          },
          hasBlobSupport: function () {
              try {
                  return !!window.Blob && Boolean(new Blob());
              } catch (e) {
                  return false;
              }
          },
          hasArrayBufferViewSupport: function () {
              try {
                  return new Blob([new Uint8Array(100)]).size === 100;
              } catch (e) {
                  return false;
              }
          },
          hasResumableUploadSupport: function () {
              /** @namespace Blob.prototype.webkitSlice */
              /** @namespace Blob.prototype.mozSlice */
              return $h.hasFileUploadSupport() && $h.hasBlobSupport() && $h.hasArrayBufferViewSupport() &&
                  (!!Blob.prototype.webkitSlice || !!Blob.prototype.mozSlice || !!Blob.prototype.slice || false);
          },
          dataURI2Blob: function (dataURI) {
              var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder ||
                  window.MSBlobBuilder, canBlob = $h.hasBlobSupport(), byteStr, arrayBuffer, intArray, i, mimeStr, bb,
                  canProceed = (canBlob || BlobBuilder) && window.atob && window.ArrayBuffer && window.Uint8Array;
              if (!canProceed) {
                  return null;
              }
              if (dataURI.split(',')[0].indexOf('base64') >= 0) {
                  byteStr = atob(dataURI.split(',')[1]);
              } else {
                  byteStr = decodeURIComponent(dataURI.split(',')[1]);
              }
              arrayBuffer = new ArrayBuffer(byteStr.length);
              intArray = new Uint8Array(arrayBuffer);
              for (i = 0; i < byteStr.length; i += 1) {
                  intArray[i] = byteStr.charCodeAt(i);
              }
              mimeStr = dataURI.split(',')[0].split(':')[1].split(';')[0];
              if (canBlob) {
                  return new Blob([$h.hasArrayBufferViewSupport() ? intArray : arrayBuffer], {type: mimeStr});
              }
              bb = new BlobBuilder();
              bb.append(arrayBuffer);
              return bb.getBlob(mimeStr);
          },
          arrayBuffer2String: function (buffer) {
              if (window.TextDecoder) {
                  return new TextDecoder('utf-8').decode(buffer);
              }
              var array = Array.prototype.slice.apply(new Uint8Array(buffer)), out = '', i = 0, len, c, char2, char3;
              len = array.length;
              while (i < len) {
                  c = array[i++];
                  switch (c >> 4) { // jshint ignore:line
                      case 0:
                      case 1:
                      case 2:
                      case 3:
                      case 4:
                      case 5:
                      case 6:
                      case 7:
                          // 0xxxxxxx
                          out += String.fromCharCode(c);
                          break;
                      case 12:
                      case 13:
                          // 110x xxxx   10xx xxxx
                          char2 = array[i++];
                          out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); // jshint ignore:line
                          break;
                      case 14:
                          // 1110 xxxx  10xx xxxx  10xx xxxx
                          char2 = array[i++];
                          char3 = array[i++];
                          out += String.fromCharCode(((c & 0x0F) << 12) | // jshint ignore:line
                              ((char2 & 0x3F) << 6) |  // jshint ignore:line
                              ((char3 & 0x3F) << 0)); // jshint ignore:line
                          break;
                  }
              }
              return out;
          },
          isHtml: function (str) {
              var a = document.createElement('div');
              a.innerHTML = str;
              for (var c = a.childNodes, i = c.length; i--;) {
                  if (c[i].nodeType === 1) {
                      return true;
                  }
              }
              return false;
          },
          isSvg: function (str) {
              return str.match(/^\s*<\?xml/i) && (str.match(/<!DOCTYPE svg/i) || str.match(/<svg/i));
          },
          getMimeType: function (signature, contents, type) {
              switch (signature) {
                  case 'ffd8ffe0':
                  case 'ffd8ffe1':
                  case 'ffd8ffe2':
                      return 'image/jpeg';
                  case '89504e47':
                      return 'image/png';
                  case '47494638':
                      return 'image/gif';
                  case '49492a00':
                      return 'image/tiff';
                  case '52494646':
                      return 'image/webp';
                  case '66747970':
                      return 'video/3gp';
                  case '4f676753':
                      return 'video/ogg';
                  case '1a45dfa3':
                      return 'video/mkv';
                  case '000001ba':
                  case '000001b3':
                      return 'video/mpeg';
                  case '3026b275':
                      return 'video/wmv';
                  case '25504446':
                      return 'application/pdf';
                  case '25215053':
                      return 'application/ps';
                  case '504b0304':
                  case '504b0506':
                  case '504b0508':
                      return 'application/zip';
                  case '377abcaf':
                      return 'application/7z';
                  case '75737461':
                      return 'application/tar';
                  case '7801730d':
                      return 'application/dmg';
                  default:
                      switch (signature.substring(0, 6)) {
                          case '435753':
                              return 'application/x-shockwave-flash';
                          case '494433':
                              return 'audio/mp3';
                          case '425a68':
                              return 'application/bzip';
                          default:
                              switch (signature.substring(0, 4)) {
                                  case '424d':
                                      return 'image/bmp';
                                  case 'fffb':
                                      return 'audio/mp3';
                                  case '4d5a':
                                      return 'application/exe';
                                  case '1f9d':
                                  case '1fa0':
                                      return 'application/zip';
                                  case '1f8b':
                                      return 'application/gzip';
                                  default:
                                      return contents && !contents.match(
                                          /[^\u0000-\u007f]/) ? 'application/text-plain' : type;
                              }
                      }
              }
          },
          addCss: function ($el, css) {
              $el.removeClass(css).addClass(css);
          },
          getElement: function (options, param, value) {
              return ($h.isEmpty(options) || $h.isEmpty(options[param])) ? value : $(options[param]);
          },
          createElement: function (str, tag) {
              tag = tag || 'div';
              return $($.parseHTML('<' + tag + '>' + str + '</' + tag + '>'));
          },
          uniqId: function () {
              return (new Date().getTime() + Math.floor(Math.random() * Math.pow(10, 15))).toString(36);
          },
          cspBuffer: {
              CSP_ATTRIB: 'data-csp-01928735', // a randomly named temporary attribute to store the CSP elem id
              domElementsStyles: {},
              stash: function (htmlString) {
                  var self = this, outerDom = $.parseHTML('<div>' + htmlString + '</div>'), $el = $(outerDom);
                  $el.find('[style]').each(function (key, elem) {
                      var $elem = $(elem), styleDeclaration = $elem[0].style, id = $h.uniqId(), styles = {};
                      if (styleDeclaration && styleDeclaration.length) {
                          $(styleDeclaration).each(function () {
                              styles[this] = styleDeclaration[this];
                          });
                          self.domElementsStyles[id] = styles;
                          $elem.removeAttr('style').attr(self.CSP_ATTRIB, id);
                      }
                  });
                  $el.filter('*').removeAttr('style');                   // make sure all style attr are removed
                  var values = Object.values ? Object.values(outerDom) : Object.keys(outerDom).map(function (itm) {
                      return outerDom[itm];
                  });
                  return values.flatMap(function (elem) {
                      return elem.innerHTML;
                  }).join('');
              },
              apply: function (domElement) {
                  var self = this, $el = $(domElement);
                  $el.find('[' + self.CSP_ATTRIB + ']').each(function (key, elem) {
                      var $elem = $(elem), id = $elem.attr(self.CSP_ATTRIB), styles = self.domElementsStyles[id];
                      if (styles) {
                          $elem.css(styles);
                      }
                      $elem.removeAttr(self.CSP_ATTRIB);
                  });
                  self.domElementsStyles = {};
              }
          },
          setHtml: function ($elem, htmlString) {
              var buf = $h.cspBuffer;
              $elem.html(buf.stash(htmlString));
              buf.apply($elem);
              return $elem;
          },
          htmlEncode: function (str, undefVal) {
              if (str === undefined) {
                  return undefVal || null;
              }
              return str.replace(/&/g, '&amp;')
                  .replace(/</g, '&lt;')
                  .replace(/>/g, '&gt;')
                  .replace(/"/g, '&quot;')
                  .replace(/'/g, '&apos;');
          },
          replaceTags: function (str, tags) {
              var out = str;
              if (!tags) {
                  return out;
              }
              $.each(tags, function (key, value) {
                  if (typeof value === 'function') {
                      value = value();
                  }
                  out = out.split(key).join(value);
              });
              return out;
          },
          cleanMemory: function ($thumb) {
              var data = $thumb.is('img') ? $thumb.attr('src') : $thumb.find('source').attr('src');
              $h.revokeObjectURL(data);
          },
          findFileName: function (filePath) {
              var sepIndex = filePath.lastIndexOf('/');
              if (sepIndex === -1) {
                  sepIndex = filePath.lastIndexOf('\\');
              }
              return filePath.split(filePath.substring(sepIndex, sepIndex + 1)).pop();
          },
          checkFullScreen: function () {
              return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement ||
                  document.msFullscreenElement;
          },
          toggleFullScreen: function (maximize) {
              var doc = document, de = doc.documentElement, isFullScreen = $h.checkFullScreen();
              if (de && maximize && !isFullScreen) {
                  if (de.requestFullscreen) {
                      de.requestFullscreen();
                  } else {
                      if (de.msRequestFullscreen) {
                          de.msRequestFullscreen();
                      } else {
                          if (de.mozRequestFullScreen) {
                              de.mozRequestFullScreen();
                          } else {
                              if (de.webkitRequestFullscreen) {
                                  de.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
                              }
                          }
                      }
                  }
              } else {
                  if (isFullScreen) {
                      if (doc.exitFullscreen) {
                          doc.exitFullscreen();
                      } else {
                          if (doc.msExitFullscreen) {
                              doc.msExitFullscreen();
                          } else {
                              if (doc.mozCancelFullScreen) {
                                  doc.mozCancelFullScreen();
                              } else {
                                  if (doc.webkitExitFullscreen) {
                                      doc.webkitExitFullscreen();
                                  }
                              }
                          }
                      }
                  }
              }
          },
          moveArray: function (arr, oldIndex, newIndex, reverseOrder) {
              var newArr = $.extend(true, [], arr);
              if (reverseOrder) {
                  newArr.reverse();
              }
              if (newIndex >= newArr.length) {
                  var k = newIndex - newArr.length;
                  while ((k--) + 1) {
                      newArr.push(undefined);
                  }
              }
              newArr.splice(newIndex, 0, newArr.splice(oldIndex, 1)[0]);
              if (reverseOrder) {
                  newArr.reverse();
              }
              return newArr;
          },
          closeButton: function (css) {
              css = css ? 'close ' + css : 'close';
              return '<button type="button" class="' + css + '" aria-label="Close">\n' +
                  '  <span aria-hidden="true">&times;</span>\n' +
                  '</button>';
          },
          getRotation: function (value) {
              switch (value) {
                  case 2:
                      return 'rotateY(180deg)';
                  case 3:
                      return 'rotate(180deg)';
                  case 4:
                      return 'rotate(180deg) rotateY(180deg)';
                  case 5:
                      return 'rotate(270deg) rotateY(180deg)';
                  case 6:
                      return 'rotate(90deg)';
                  case 7:
                      return 'rotate(90deg) rotateY(180deg)';
                  case 8:
                      return 'rotate(270deg)';
                  default:
                      return '';
              }
          },
          setTransform: function (el, val) {
              if (!el) {
                  return;
              }
              el.style.transform = val;
              el.style.webkitTransform = val;
              el.style['-moz-transform'] = val;
              el.style['-ms-transform'] = val;
              el.style['-o-transform'] = val;
          },
          getObjectKeys: function (obj) {
              var keys = [];
              if (obj) {
                  $.each(obj, function (key) {
                      keys.push(key);
                  });
              }
              return keys;
          },
          getObjectSize: function (obj) {
              return $h.getObjectKeys(obj).length;
          },
          /**
           * Small dependency injection for the task manager
           * https://gist.github.com/fearphage/4341799
           */
          whenAll: function (array) {
              var s = [].slice, resolveValues = arguments.length === 1 && $h.isArray(array) ? array : s.call(arguments),
                  deferred = $.Deferred(), i, failed = 0, value, length = resolveValues.length,
                  remaining = length, rejectContexts, rejectValues, resolveContexts, updateFunc;
              rejectContexts = rejectValues = resolveContexts = Array(length);
              updateFunc = function (index, contexts, values) {
                  return function () {
                      if (values !== resolveValues) {
                          failed++;
                      }
                      deferred.notifyWith(contexts[index] = this, values[index] = s.call(arguments));
                      if (!(--remaining)) {
                          deferred[(!failed ? 'resolve' : 'reject') + 'With'](contexts, values);
                      }
                  };
              };
              for (i = 0; i < length; i++) {
                  if ((value = resolveValues[i]) && $.isFunction(value.promise)) {
                      value.promise()
                          .done(updateFunc(i, resolveContexts, resolveValues))
                          .fail(updateFunc(i, rejectContexts, rejectValues));
                  } else {
                      deferred.notifyWith(this, value);
                      --remaining;
                  }
              }
              if (!remaining) {
                  deferred.resolveWith(resolveContexts, resolveValues);
              }
              return deferred.promise();
          }
      };
      FileInput = function (element, options) {
          var self = this;
          self.$element = $(element);
          self.$parent = self.$element.parent();
          if (!self._validate()) {
              return;
          }
          self.isPreviewable = $h.hasFileAPISupport();
          self.isIE9 = $h.isIE(9);
          self.isIE10 = $h.isIE(10);
          if (self.isPreviewable || self.isIE9) {
              self._init(options);
              self._listen();
          }
          self.$element.removeClass('file-loading');
      };
  
      FileInput.prototype = {
          constructor: FileInput,
          _cleanup: function () {
              var self = this;
              self.reader = null;
              self.clearFileStack();
              self.fileBatchCompleted = true;
              self.isError = false;
              self.isDuplicateError = false;
              self.isPersistentError = false;
              self.cancelling = false;
              self.paused = false;
              self.lastProgress = 0;
              self._initAjax();
          },
          _isAborted: function () {
              var self = this;
              return self.cancelling || self.paused;
          },
          _initAjax: function () {
              var self = this, tm = self.taskManager = {
                  pool: {},
                  addPool: function (id) {
                      return (tm.pool[id] = new tm.TasksPool(id));
                  },
                  getPool: function (id) {
                      return tm.pool[id];
                  },
                  addTask: function (id, logic) { // add standalone task directly from task manager
                      return new tm.Task(id, logic);
                  },
                  TasksPool: function (id) {
                      var tp = this;
                      tp.id = id;
                      tp.cancelled = false;
                      tp.cancelledDeferrer = $.Deferred();
                      tp.tasks = {};
                      tp.addTask = function (id, logic) {
                          return (tp.tasks[id] = new tm.Task(id, logic));
                      };
                      tp.size = function () {
                          return $h.getObjectSize(tp.tasks);
                      };
                      tp.run = function (maxThreads) {
                          var i = 0, failed = false, task, tasksList = $h.getObjectKeys(tp.tasks).map(function (key) {
                              return tp.tasks[key];
                          }), tasksDone = [], deferred = $.Deferred(), enqueue, callback;
  
                          if (tp.cancelled) {
                              tp.cancelledDeferrer.resolve();
                              return deferred.reject();
                          }
                          // if run all at once
                          if (!maxThreads) {
                              var tasksDeferredList = $h.getObjectKeys(tp.tasks).map(function (key) {
                                  return tp.tasks[key].deferred;
                              });
                              // when all are done
                              $h.whenAll(tasksDeferredList).done(function () {
                                  var argv = $h.getArray(arguments);
                                  if (!tp.cancelled) {
                                      deferred.resolve.apply(null, argv);
                                      tp.cancelledDeferrer.reject();
                                  } else {
                                      deferred.reject.apply(null, argv);
                                      tp.cancelledDeferrer.resolve();
                                  }
                              }).fail(function () {
                                  var argv = $h.getArray(arguments);
                                  deferred.reject.apply(null, argv);
                                  if (!tp.cancelled) {
                                      tp.cancelledDeferrer.reject();
                                  } else {
                                      tp.cancelledDeferrer.resolve();
                                  }
                              });
                              // run all tasks
                              $.each(tp.tasks, function (id) {
                                  task = tp.tasks[id];
                                  task.run();
                              });
                              return deferred;
                          }
                          enqueue = function (task) {
                              $.when(task.deferred)
                                  .fail(function () {
                                      failed = true;
                                      callback.apply(null, arguments);
                                  })
                                  .always(callback);
                          };
                          callback = function () {
                              var argv = $h.getArray(arguments);
                              // notify a task just ended
                              deferred.notify(argv);
                              tasksDone.push(argv);
                              if (tp.cancelled) {
                                  deferred.reject.apply(null, tasksDone);
                                  tp.cancelledDeferrer.resolve();
                                  return;
                              }
                              if (tasksDone.length === tp.size()) {
                                  if (failed) {
                                      deferred.reject.apply(null, tasksDone);
                                  } else {
                                      deferred.resolve.apply(null, tasksDone);
                                  }
                              }
                              // if there are any tasks remaining
                              if (tasksList.length) {
                                  task = tasksList.shift();
                                  enqueue(task);
                                  task.run();
                              }
                          };
                          // run the first "maxThreads" tasks
                          while (tasksList.length && i++ < maxThreads) {
                              task = tasksList.shift();
                              enqueue(task);
                              task.run();
                          }
                          return deferred;
                      };
                      tp.cancel = function () {
                          tp.cancelled = true;
                          return tp.cancelledDeferrer;
                      };
                  },
                  Task: function (id, logic) {
                      var tk = this;
                      tk.id = id;
                      tk.deferred = $.Deferred();
                      tk.logic = logic;
                      tk.context = null;
                      tk.run = function () {
                          var argv = $h.getArray(arguments);
                          argv.unshift(tk.deferred);     // add deferrer as first argument
                          logic.apply(tk.context, argv); // run task
                          return tk.deferred;            // return deferrer
                      };
                      tk.runWithContext = function (context) {
                          tk.context = context;
                          return tk.run();
                      };
                  }
              };
              self.ajaxQueue = [];
              self.ajaxRequests = [];
              self.ajaxAborted = false;
          },
          _init: function (options, refreshMode) {
              var self = this, f, $el = self.$element, $cont, t, tmp;
              self.options = options;
              self.canOrientImage = $h.canOrientImage($el);
              $.each(options, function (key, value) {
                  switch (key) {
                      case 'minFileCount':
                      case 'maxFileCount':
                      case 'maxTotalFileCount':
                      case 'minFileSize':
                      case 'maxFileSize':
                      case 'maxFilePreviewSize':
                      case 'resizeImageQuality':
                      case 'resizeIfSizeMoreThan':
                      case 'progressUploadThreshold':
                      case 'initialPreviewCount':
                      case 'zoomModalHeight':
                      case 'minImageHeight':
                      case 'maxImageHeight':
                      case 'minImageWidth':
                      case 'maxImageWidth':
                          self[key] = $h.getNum(value);
                          break;
                      default:
                          self[key] = value;
                          break;
                  }
              });
              if (self.maxTotalFileCount > 0 && self.maxTotalFileCount < self.maxFileCount) {
                  self.maxTotalFileCount = self.maxFileCount;
              }
              if (self.rtl) { // swap buttons for rtl
                  tmp = self.previewZoomButtonIcons.prev;
                  self.previewZoomButtonIcons.prev = self.previewZoomButtonIcons.next;
                  self.previewZoomButtonIcons.next = tmp;
              }
              // validate chunk threads to not exceed maxAjaxThreads
              if (!isNaN(self.maxAjaxThreads) && self.maxAjaxThreads < self.resumableUploadOptions.maxThreads) {
                  self.resumableUploadOptions.maxThreads = self.maxAjaxThreads;
              }
              self._initFileManager();
              if (typeof self.autoOrientImage === 'function') {
                  self.autoOrientImage = self.autoOrientImage();
              }
              if (typeof self.autoOrientImageInitial === 'function') {
                  self.autoOrientImageInitial = self.autoOrientImageInitial();
              }
              if (!refreshMode) {
                  self._cleanup();
              }
              self.duplicateErrors = [];
              self.$form = $el.closest('form');
              self._initTemplateDefaults();
              self.uploadFileAttr = !$h.isEmpty($el.attr('name')) ? $el.attr('name') : 'file_data';
              t = self._getLayoutTemplate('progress');
              self.progressTemplate = t.replace('{class}', self.progressClass);
              self.progressInfoTemplate = t.replace('{class}', self.progressInfoClass);
              self.progressPauseTemplate = t.replace('{class}', self.progressPauseClass);
              self.progressCompleteTemplate = t.replace('{class}', self.progressCompleteClass);
              self.progressErrorTemplate = t.replace('{class}', self.progressErrorClass);
              self.isDisabled = $el.attr('disabled') || $el.attr('readonly');
              if (self.isDisabled) {
                  $el.attr('disabled', true);
              }
              self.isClickable = self.browseOnZoneClick && self.showPreview &&
                  (self.dropZoneEnabled || !$h.isEmpty(self.defaultPreviewContent));
              self.isAjaxUpload = $h.hasFileUploadSupport() && !$h.isEmpty(self.uploadUrl);
              self.dropZoneEnabled = $h.hasDragDropSupport() && self.dropZoneEnabled;
              if (!self.isAjaxUpload) {
                  self.dropZoneEnabled = self.dropZoneEnabled && $h.canAssignFilesToInput();
              }
              self.slug = typeof options.slugCallback === 'function' ? options.slugCallback : self._slugDefault;
              self.mainTemplate = self.showCaption ? self._getLayoutTemplate('main1') : self._getLayoutTemplate('main2');
              self.captionTemplate = self._getLayoutTemplate('caption');
              self.previewGenericTemplate = self._getPreviewTemplate('generic');
              if (!self.imageCanvas && self.resizeImage && (self.maxImageWidth || self.maxImageHeight)) {
                  self.imageCanvas = document.createElement('canvas');
                  self.imageCanvasContext = self.imageCanvas.getContext('2d');
              }
              if ($h.isEmpty($el.attr('id'))) {
                  $el.attr('id', $h.uniqId());
              }
              self.namespace = '.fileinput_' + $el.attr('id').replace(/-/g, '_');
              if (self.$container === undefined) {
                  self.$container = self._createContainer();
              } else {
                  self._refreshContainer();
              }
              $cont = self.$container;
              self.$dropZone = $cont.find('.file-drop-zone');
              self.$progress = $cont.find('.kv-upload-progress');
              self.$btnUpload = $cont.find('.fileinput-upload');
              self.$captionContainer = $h.getElement(options, 'elCaptionContainer', $cont.find('.file-caption'));
              self.$caption = $h.getElement(options, 'elCaptionText', $cont.find('.file-caption-name'));
              if (!$h.isEmpty(self.msgPlaceholder)) {
                  f = $el.attr('multiple') ? self.filePlural : self.fileSingle;
                  self.$caption.attr('placeholder', self.msgPlaceholder.replace('{files}', f));
              }
              self.$captionIcon = self.$captionContainer.find('.file-caption-icon');
              self.$previewContainer = $h.getElement(options, 'elPreviewContainer', $cont.find('.file-preview'));
              self.$preview = $h.getElement(options, 'elPreviewImage', $cont.find('.file-preview-thumbnails'));
              self.$previewStatus = $h.getElement(options, 'elPreviewStatus', $cont.find('.file-preview-status'));
              self.$errorContainer = $h.getElement(options, 'elErrorContainer',
                  self.$previewContainer.find('.kv-fileinput-error'));
              self._validateDisabled();
              if (!$h.isEmpty(self.msgErrorClass)) {
                  $h.addCss(self.$errorContainer, self.msgErrorClass);
              }
              if (!refreshMode) {
                  self._resetErrors();
                  self.$errorContainer.hide();
                  self.previewInitId = 'thumb-' + $el.attr('id');
                  self._initPreviewCache();
                  self._initPreview(true);
                  self._initPreviewActions();
                  if (self.$parent.hasClass('file-loading')) {
                      self.$container.insertBefore(self.$parent);
                      self.$parent.remove();
                  }
              } else {
                  if (!self._errorsExist()) {
                      self.$errorContainer.hide();
                  }
              }
              self._setFileDropZoneTitle();
              if ($el.attr('disabled')) {
                  self.disable();
              }
              self._initZoom();
              if (self.hideThumbnailContent) {
                  $h.addCss(self.$preview, 'hide-content');
              }
          },
          _initFileManager: function () {
              var self = this;
              self.uploadStartTime = $h.now();
              self.fileManager = {
                  stack: {},
                  filesProcessed: [],
                  errors: [],
                  loadedImages: {},
                  totalImages: 0,
                  totalFiles: null,
                  totalSize: null,
                  uploadedSize: 0,
                  stats: {},
                  bpsLog: [],
                  bps: 0,
                  initStats: function (id) {
                      var data = {started: $h.now()};
                      if (id) {
                          self.fileManager.stats[id] = data;
                      } else {
                          self.fileManager.stats = data;
                      }
                  },
                  getUploadStats: function (id, loaded, total) {
                      var fm = self.fileManager,
                          started = id ? fm.stats[id] && fm.stats[id].started || $h.now() : self.uploadStartTime,
                          elapsed = ($h.now() - started) / 1000,
                          speeds = ['B/s', 'KB/s', 'MB/s', 'GB/s', 'TB/s', 'PB/s', 'EB/s', 'ZB/s', 'YB/s'],
                          bps = Math.ceil(elapsed ? loaded / elapsed : 0),
                          pendingBytes = total - loaded, out, delay = fm.bpsLog.length ? self.bitrateUpdateDelay : 0;
                      setTimeout(function () {
                          var i, j = 0, n = 0, len, beg;
                          fm.bpsLog.push(bps);
                          fm.bpsLog.sort(function (a, b) {
                              return a - b;
                          });
                          len = fm.bpsLog.length;
                          beg = len > 10 ? len - 10 : Math.ceil(len / 2);
                          for (i = len; i > beg; i--) {
                              n = parseFloat(fm.bpsLog[i]);
                              j++;
                          }
                          fm.bps = (j > 0 ? n / j : 0) * 64;
                      }, delay);
                      out = {
                          fileId: id,
                          started: started,
                          elapsed: elapsed,
                          loaded: loaded,
                          total: total,
                          bps: fm.bps,
                          bitrate: self._getSize(fm.bps, speeds),
                          pendingBytes: pendingBytes
                      };
                      if (id) {
                          fm.stats[id] = out;
                      } else {
                          fm.stats = out;
                      }
                      return out;
                  },
                  exists: function (id) {
                      return $.inArray(id, self.fileManager.getIdList()) !== -1;
                  },
                  count: function () {
                      return self.fileManager.getIdList().length;
                  },
                  total: function () {
                      var fm = self.fileManager;
                      if (!fm.totalFiles) {
                          fm.totalFiles = fm.count();
                      }
                      return fm.totalFiles;
                  },
                  getTotalSize: function () {
                      var fm = self.fileManager;
                      if (fm.totalSize) {
                          return fm.totalSize;
                      }
                      fm.totalSize = 0;
                      $.each(self.getFileStack(), function (id, f) {
                          var size = parseFloat(f.size);
                          fm.totalSize += isNaN(size) ? 0 : size;
                      });
                      return fm.totalSize;
                  },
                  add: function (file, id) {
                      if (!id) {
                          id = self.fileManager.getId(file);
                      }
                      if (!id) {
                          return;
                      }
                      self.fileManager.stack[id] = {
                          file: file,
                          name: $h.getFileName(file),
                          relativePath: $h.getFileRelativePath(file),
                          size: file.size,
                          nameFmt: self._getFileName(file, ''),
                          sizeFmt: self._getSize(file.size)
                      };
                  },
                  remove: function ($thumb) {
                      var id = self._getThumbFileId($thumb);
                      if (id) {
                          self.fileManager.removeFile(id);
                      }
                  },
                  removeFile: function (id) {
                      delete self.fileManager.stack[id];
                      delete self.fileManager.loadedImages[id];
                  },
                  move: function (idFrom, idTo) {
                      var result = {}, stack = self.fileManager.stack;
                      if (!idFrom && !idTo || idFrom === idTo) {
                          return;
                      }
                      $.each(stack, function (k, v) {
                          if (k !== idFrom) {
                              result[k] = v;
                          }
                          if (k === idTo) {
                              result[idFrom] = stack[idFrom];
                          }
                      });
                      self.fileManager.stack = result;
                  },
                  list: function () {
                      var files = [];
                      $.each(self.getFileStack(), function (k, v) {
                          if (v && v.file) {
                              files.push(v.file);
                          }
                      });
                      return files;
                  },
                  isPending: function (id) {
                      return $.inArray(id, self.fileManager.filesProcessed) === -1 && self.fileManager.exists(id);
                  },
                  isProcessed: function () {
                      var filesProcessed = true, fm = self.fileManager;
                      $.each(self.getFileStack(), function (id) {
                          if (fm.isPending(id)) {
                              filesProcessed = false;
                          }
                      });
                      return filesProcessed;
                  },
                  clear: function () {
                      var fm = self.fileManager;
                      self.isDuplicateError = false;
                      self.isPersistentError = false;
                      fm.totalFiles = null;
                      fm.totalSize = null;
                      fm.uploadedSize = 0;
                      fm.stack = {};
                      fm.errors = [];
                      fm.filesProcessed = [];
                      fm.stats = {};
                      fm.bpsLog = [];
                      fm.bps = 0;
                      fm.clearImages();
                  },
                  clearImages: function () {
                      self.fileManager.loadedImages = {};
                      self.fileManager.totalImages = 0;
                  },
                  addImage: function (id, config) {
                      self.fileManager.loadedImages[id] = config;
                  },
                  removeImage: function (id) {
                      delete self.fileManager.loadedImages[id];
                  },
                  getImageIdList: function () {
                      return $h.getObjectKeys(self.fileManager.loadedImages);
                  },
                  getImageCount: function () {
                      return self.fileManager.getImageIdList().length;
                  },
                  getId: function (file) {
                      return self._getFileId(file);
                  },
                  getIndex: function (id) {
                      return self.fileManager.getIdList().indexOf(id);
                  },
                  getThumb: function (id) {
                      var $thumb = null;
                      self._getThumbs().each(function () {
                          var $t = $(this);
                          if (self._getThumbFileId($t) === id) {
                              $thumb = $t;
                          }
                      });
                      return $thumb;
                  },
                  getThumbIndex: function ($thumb) {
                      var id = self._getThumbFileId($thumb);
                      return self.fileManager.getIndex(id);
                  },
                  getIdList: function () {
                      return $h.getObjectKeys(self.fileManager.stack);
                  },
                  getFile: function (id) {
                      return self.fileManager.stack[id] || null;
                  },
                  getFileName: function (id, fmt) {
                      var file = self.fileManager.getFile(id);
                      if (!file) {
                          return '';
                      }
                      return fmt ? (file.nameFmt || '') : file.name || '';
                  },
                  getFirstFile: function () {
                      var ids = self.fileManager.getIdList(), id = ids && ids.length ? ids[0] : null;
                      return self.fileManager.getFile(id);
                  },
                  setFile: function (id, file) {
                      if (self.fileManager.getFile(id)) {
                          self.fileManager.stack[id].file = file;
                      } else {
                          self.fileManager.add(file, id);
                      }
                  },
                  setProcessed: function (id) {
                      self.fileManager.filesProcessed.push(id);
                  },
                  getProgress: function () {
                      var total = self.fileManager.total(), filesProcessed = self.fileManager.filesProcessed.length;
                      if (!total) {
                          return 0;
                      }
                      return Math.ceil(filesProcessed / total * 100);
  
                  },
                  setProgress: function (id, pct) {
                      var f = self.fileManager.getFile(id);
                      if (!isNaN(pct) && f) {
                          f.progress = pct;
                      }
                  }
              };
          },
          _setUploadData: function (fd, config) {
              var self = this;
              $.each(config, function (key, value) {
                  var param = self.uploadParamNames[key] || key;
                  if ($h.isArray(value)) {
                      fd.append(param, value[0], value[1]);
                  } else {
                      fd.append(param, value);
                  }
              });
          },
          _initResumableUpload: function () {
              var self = this, opts = self.resumableUploadOptions, logs = $h.logMessages, rm, fm = self.fileManager;
              if (!self.enableResumableUpload) {
                  return;
              }
              if (opts.fallback !== false && typeof opts.fallback !== 'function') {
                  opts.fallback = function (s) {
                      s._log(logs.noResumableSupport);
                      s.enableResumableUpload = false;
                  };
              }
              if (!$h.hasResumableUploadSupport() && opts.fallback !== false) {
                  opts.fallback(self);
                  return;
              }
              if (!self.uploadUrl && self.enableResumableUpload) {
                  self._log(logs.noUploadUrl);
                  self.enableResumableUpload = false;
                  return;
  
              }
              opts.chunkSize = parseFloat(opts.chunkSize);
              if (opts.chunkSize <= 0 || isNaN(opts.chunkSize)) {
                  self._log(logs.invalidChunkSize, {chunkSize: opts.chunkSize});
                  self.enableResumableUpload = false;
                  return;
              }
              rm = self.resumableManager = {
                  init: function (id, f, index) {
                      rm.logs = [];
                      rm.stack = [];
                      rm.error = '';
                      rm.id = id;
                      rm.file = f.file;
                      rm.fileName = f.name;
                      rm.fileIndex = index;
                      rm.completed = false;
                      rm.lastProgress = 0;
                      if (self.showPreview) {
                          rm.$thumb = fm.getThumb(id) || null;
                          rm.$progress = rm.$btnDelete = null;
                          if (rm.$thumb && rm.$thumb.length) {
                              rm.$progress = rm.$thumb.find('.file-thumb-progress');
                              rm.$btnDelete = rm.$thumb.find('.kv-file-remove');
                          }
                      }
                      rm.chunkSize = opts.chunkSize * 1024;
                      rm.chunkCount = rm.getTotalChunks();
                  },
                  setAjaxError: function (jqXHR, textStatus, errorThrown, isTest) {
                      if (jqXHR.responseJSON && jqXHR.responseJSON.error) {
                          errorThrown = jqXHR.responseJSON.error.toString();
                      }
                      if (!isTest) {
                          rm.error = errorThrown;
                      }
                      if (opts.showErrorLog) {
                          self._log(logs.ajaxError, {
                              status: jqXHR.status,
                              error: errorThrown,
                              text: jqXHR.responseText || ''
                          });
                      }
                  },
                  reset: function () {
                      rm.stack = [];
                      rm.chunksProcessed = {};
                  },
                  setProcessed: function (status) {
                      var id = rm.id, msg, $thumb = rm.$thumb, $prog = rm.$progress, hasThumb = $thumb && $thumb.length,
                          params = {id: hasThumb ? $thumb.attr('id') : '', index: fm.getIndex(id), fileId: id}, tokens,
                          skipErrorsAndProceed = self.resumableUploadOptions.skipErrorsAndProceed;
                      rm.completed = true;
                      rm.lastProgress = 0;
                      if (hasThumb) {
                          $thumb.removeClass('file-uploading');
                      }
                      if (status === 'success') {
                          fm.uploadedSize += rm.file.size;
                          if (self.showPreview) {
                              self._setProgress(101, $prog);
                              self._setThumbStatus($thumb, 'Success');
                              self._initUploadSuccess(rm.chunksProcessed[id].data, $thumb);
                          }
                          fm.removeFile(id);
                          delete rm.chunksProcessed[id];
                          self._raise('fileuploaded', [params.id, params.index, params.fileId]);
                          if (fm.isProcessed()) {
                              self._setProgress(101);
                          }
                      } else {
                          if (status !== 'cancel') {
                              if (self.showPreview) {
                                  self._setThumbStatus($thumb, 'Error');
                                  self._setPreviewError($thumb, true);
                                  self._setProgress(101, $prog, self.msgProgressError);
                                  self._setProgress(101, self.$progress, self.msgProgressError);
                                  self.cancelling = !skipErrorsAndProceed;
                              }
                              if (!self.$errorContainer.find('li[data-file-id="' + params.fileId + '"]').length) {
                                  tokens = {file: rm.fileName, max: opts.maxRetries, error: rm.error};
                                  msg = self.msgResumableUploadRetriesExceeded.setTokens(tokens);
                                  $.extend(params, tokens);
                                  self._showFileError(msg, params, 'filemaxretries');
                                  if (skipErrorsAndProceed) {
                                      fm.removeFile(id);
                                      delete rm.chunksProcessed[id];
                                      if (fm.isProcessed()) {
                                          self._setProgress(101);
                                      }
                                  }
                              }
                          }
                      }
                      if (fm.isProcessed()) {
                          rm.reset();
                      }
                  },
                  check: function () {
                      var status = true;
                      $.each(rm.logs, function (index, value) {
                          if (!value) {
                              status = false;
                              return false;
                          }
                      });
                  },
                  processedResumables: function () {
                      var logs = rm.logs, i, count = 0;
                      if (!logs || !logs.length) {
                          return 0;
                      }
                      for (i = 0; i < logs.length; i++) {
                          if (logs[i] === true) {
                              count++;
                          }
                      }
                      return count;
                  },
                  getUploadedSize: function () {
                      var size = rm.processedResumables() * rm.chunkSize;
                      return size > rm.file.size ? rm.file.size : size;
                  },
                  getTotalChunks: function () {
                      var chunkSize = parseFloat(rm.chunkSize);
                      if (!isNaN(chunkSize) && chunkSize > 0) {
                          return Math.ceil(rm.file.size / chunkSize);
                      }
                      return 0;
                  },
                  getProgress: function () {
                      var chunksProcessed = rm.processedResumables(), total = rm.chunkCount;
                      if (total === 0) {
                          return 0;
                      }
                      return Math.ceil(chunksProcessed / total * 100);
                  },
                  checkAborted: function (intervalId) {
                      if (self._isAborted()) {
                          clearInterval(intervalId);
                          self.unlock();
                      }
                  },
                  upload: function () {
                      var ids = fm.getIdList(), flag = 'new', intervalId;
                      intervalId = setInterval(function () {
                          var id;
                          rm.checkAborted(intervalId);
                          if (flag === 'new') {
                              self.lock();
                              flag = 'processing';
                              id = ids.shift();
                              fm.initStats(id);
                              if (fm.stack[id]) {
                                  rm.init(id, fm.stack[id], fm.getIndex(id));
                                  rm.processUpload();
                              }
                          }
                          if (!fm.isPending(id) && rm.completed) {
                              flag = 'new';
                          }
                          if (fm.isProcessed()) {
                              var $initThumbs = self.$preview.find('.file-preview-initial');
                              if ($initThumbs.length) {
                                  $h.addCss($initThumbs, $h.SORT_CSS);
                                  self._initSortable();
                              }
                              clearInterval(intervalId);
                              self._clearFileInput();
                              self.unlock();
                              setTimeout(function () {
                                  var data = self.previewCache.data;
                                  if (data) {
                                      self.initialPreview = data.content;
                                      self.initialPreviewConfig = data.config;
                                      self.initialPreviewThumbTags = data.tags;
                                  }
                                  self._raise('filebatchuploadcomplete', [
                                      self.initialPreview,
                                      self.initialPreviewConfig,
                                      self.initialPreviewThumbTags,
                                      self._getExtraData()
                                  ]);
                              }, self.processDelay);
                          }
                      }, self.processDelay);
                  },
                  uploadResumable: function () {
                      var i, pool, tm = self.taskManager, total = rm.chunkCount;
                      pool = tm.addPool(rm.id);
                      for (i = 0; i < total; i++) {
                          rm.logs[i] = !!(rm.chunksProcessed[rm.id] && rm.chunksProcessed[rm.id][i]);
                          if (!rm.logs[i]) {
                              rm.pushAjax(i, 0);
                          }
                      }
                      pool.run(opts.maxThreads)
                          .done(function () {
                              rm.setProcessed('success');
                          })
                          .fail(function () {
                              rm.setProcessed(pool.cancelled ? 'cancel' : 'error');
                          });
                  },
                  processUpload: function () {
                      var fd, f, id = rm.id, fnBefore, fnSuccess, fnError, fnComplete, outData;
                      if (!opts.testUrl) {
                          rm.uploadResumable();
                          return;
                      }
                      fd = new FormData();
                      f = fm.stack[id];
                      self._setUploadData(fd, {
                          fileId: id,
                          fileName: f.fileName,
                          fileSize: f.size,
                          fileRelativePath: f.relativePath,
                          chunkSize: rm.chunkSize,
                          chunkCount: rm.chunkCount
                      });
                      fnBefore = function (jqXHR) {
                          outData = self._getOutData(fd, jqXHR);
                          self._raise('filetestbeforesend', [id, fm, rm, outData]);
                      };
                      fnSuccess = function (data, textStatus, jqXHR) {
                          outData = self._getOutData(fd, jqXHR, data);
                          var pNames = self.uploadParamNames, chunksUploaded = pNames.chunksUploaded || 'chunksUploaded',
                              params = [id, fm, rm, outData];
                          if (!data[chunksUploaded] || !$h.isArray(data[chunksUploaded])) {
                              self._raise('filetesterror', params);
                          } else {
                              if (!rm.chunksProcessed[id]) {
                                  rm.chunksProcessed[id] = {};
                              }
                              $.each(data[chunksUploaded], function (key, index) {
                                  rm.logs[index] = true;
                                  rm.chunksProcessed[id][index] = true;
                              });
                              rm.chunksProcessed[id].data = data;
                              self._raise('filetestsuccess', params);
                          }
                          rm.uploadResumable();
                      };
                      fnError = function (jqXHR, textStatus, errorThrown) {
                          outData = self._getOutData(fd, jqXHR);
                          self._raise('filetestajaxerror', [id, fm, rm, outData]);
                          rm.setAjaxError(jqXHR, textStatus, errorThrown, true);
                          rm.uploadResumable();
                      };
                      fnComplete = function () {
                          self._raise('filetestcomplete', [id, fm, rm, self._getOutData(fd)]);
                      };
                      self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex, opts.testUrl);
                  },
                  pushAjax: function (index, retry) {
                      var tm = self.taskManager, pool = tm.getPool(rm.id);
                      pool.addTask(pool.size() + 1, function (deferrer) {
                          // use fifo chunk stack
                          var arr = rm.stack.shift(), index;
                          index = arr[0];
                          if (!rm.chunksProcessed[rm.id] || !rm.chunksProcessed[rm.id][index]) {
                              rm.sendAjax(index, arr[1], deferrer);
                          } else {
                              self._log(logs.chunkQueueError, {index: index});
                          }
                      });
                      rm.stack.push([index, retry]);
                  },
                  sendAjax: function (index, retry, deferrer) {
                      var f, chunkSize = rm.chunkSize, id = rm.id, file = rm.file, $thumb = rm.$thumb,
                          msgs = $h.logMessages, $btnDelete = rm.$btnDelete, logError = function (msg, tokens) {
                              if (tokens) {
                                  msg = msg.setTokens(tokens);
                              }
                              msg = msgs.resumableRequestError.setTokens({msg: msg});
                              self._log(msg);
                              deferrer.reject(msg);
                          };
                      if (rm.chunksProcessed[id] && rm.chunksProcessed[id][index]) {
                          return;
                      }
                      if (retry > opts.maxRetries) {
                          logError(msgs.resumableMaxRetriesReached, {n: opts.maxRetries});
                          rm.setProcessed('error');
                          return;
                      }
                      var fd, outData, fnBefore, fnSuccess, fnError, fnComplete, slice = file.slice ? 'slice' :
                          (file.mozSlice ? 'mozSlice' : (file.webkitSlice ? 'webkitSlice' : 'slice')),
                          blob = file[slice](chunkSize * index, chunkSize * (index + 1));
                      fd = new FormData();
                      f = fm.stack[id];
                      self._setUploadData(fd, {
                          chunkCount: rm.chunkCount,
                          chunkIndex: index,
                          chunkSize: chunkSize,
                          chunkSizeStart: chunkSize * index,
                          fileBlob: [blob, rm.fileName],
                          fileId: id,
                          fileName: rm.fileName,
                          fileRelativePath: f.relativePath,
                          fileSize: file.size,
                          retryCount: retry
                      });
                      if (rm.$progress && rm.$progress.length) {
                          rm.$progress.show();
                      }
                      fnBefore = function (jqXHR) {
                          outData = self._getOutData(fd, jqXHR);
                          if (self.showPreview) {
                              if (!$thumb.hasClass('file-preview-success')) {
                                  self._setThumbStatus($thumb, 'Loading');
                                  $h.addCss($thumb, 'file-uploading');
                              }
                              $btnDelete.attr('disabled', true);
                          }
                          self._raise('filechunkbeforesend', [id, index, retry, fm, rm, outData]);
                      };
                      fnSuccess = function (data, textStatus, jqXHR) {
                          if (self._isAborted()) {
                              logError(msgs.resumableAborting);
                              return;
                          }
                          outData = self._getOutData(fd, jqXHR, data);
                          var paramNames = self.uploadParamNames, chunkIndex = paramNames.chunkIndex || 'chunkIndex',
                              params = [id, index, retry, fm, rm, outData];
                          if (data.error) {
                              if (opts.showErrorLog) {
                                  self._log(logs.retryStatus, {
                                      retry: retry + 1,
                                      filename: rm.fileName,
                                      chunk: index
                                  });
                              }
                              self._raise('filechunkerror', params);
                              rm.pushAjax(index, retry + 1);
                              rm.error = data.error;
                              logError(data.error);
                          } else {
                              rm.logs[data[chunkIndex]] = true;
                              if (!rm.chunksProcessed[id]) {
                                  rm.chunksProcessed[id] = {};
                              }
                              rm.chunksProcessed[id][data[chunkIndex]] = true;
                              rm.chunksProcessed[id].data = data;
                              deferrer.resolve.call(null, data);
                              self._raise('filechunksuccess', params);
                              rm.check();
                          }
                      };
                      fnError = function (jqXHR, textStatus, errorThrown) {
                          if (self._isAborted()) {
                              logError(msgs.resumableAborting);
                              return;
                          }
                          outData = self._getOutData(fd, jqXHR);
                          rm.setAjaxError(jqXHR, textStatus, errorThrown);
                          self._raise('filechunkajaxerror', [id, index, retry, fm, rm, outData]);
                          rm.pushAjax(index, retry + 1);                        // push another task
                          logError(msgs.resumableRetryError, {n: retry - 1}); // resolve the current task
                      };
                      fnComplete = function () {
                          if (!self._isAborted()) {
                              self._raise('filechunkcomplete', [id, index, retry, fm, rm, self._getOutData(fd)]);
                          }
                      };
                      self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, fd, id, rm.fileIndex);
                  }
              };
              rm.reset();
          },
          _initTemplateDefaults: function () {
              var self = this, tMain1, tMain2, tPreview, tFileIcon, tClose, tCaption, tBtnDefault, tBtnLink, tBtnBrowse,
                  tModalMain, tModal, tProgress, tSize, tFooter, tActions, tActionDelete, tActionUpload, tActionDownload,
                  tActionZoom, tActionDrag, tIndicator, tTagBef, tTagBef1, tTagBef2, tTagAft, tGeneric, tHtml, tImage,
                  tText, tOffice, tGdocs, tVideo, tAudio, tFlash, tObject, tPdf, tOther, tStyle, tZoomCache, vDefaultDim,
                  tStats, tModalLabel, renderObject = function (type, mime) {
                      return '<object class="kv-preview-data file-preview-' + type + '" title="{caption}" ' +
                          'data="{data}" type="' + mime + '"' + tStyle + '>\n' + $h.DEFAULT_PREVIEW + '\n</object>\n';
                  };
              tMain1 = '{preview}\n' +
                  '<div class="kv-upload-progress kv-hidden"></div><div class="clearfix"></div>\n' +
                  '<div class="input-group {class}">\n' +
                  '  {caption}\n' +
                  '<div class="input-group-btn input-group-append">\n' +
                  '      {remove}\n' +
                  '      {cancel}\n' +
                  '      {pause}\n' +
                  '      {upload}\n' +
                  '      {browse}\n' +
                  '    </div>\n' +
                  '</div>';
              tMain2 = '{preview}\n<div class="kv-upload-progress kv-hidden"></div>\n<div class="clearfix"></div>\n' +
                  '{remove}\n{cancel}\n{upload}\n{browse}\n';
              tPreview = '<div class="file-preview {class}">\n' +
                  '  {close}' +
                  '  <div class="{dropClass} clearfix">\n' +
                  '    <div class="file-preview-thumbnails clearfix">\n' +
                  '    </div>\n' +
                  '    <div class="file-preview-status text-center text-success"></div>\n' +
                  '    <div class="kv-fileinput-error"></div>\n' +
                  '  </div>\n' +
                  '</div>';
              tClose = $h.closeButton('fileinput-remove');
              tFileIcon = '<i class="glyphicon glyphicon-file"></i>';
              // noinspection HtmlUnknownAttribute
              tCaption = '<div class="file-caption form-control {class}" tabindex="500">\n' +
                  '  <span class="file-caption-icon"></span>\n' +
                  '  <input class="file-caption-name">\n' +
                  '</div>';
              //noinspection HtmlUnknownAttribute
              tBtnDefault = '<button type="{type}" tabindex="500" title="{title}" class="{css}" ' +
                  '{status}>{icon} {label}</button>';
              //noinspection HtmlUnknownTarget,HtmlUnknownAttribute
              tBtnLink = '<a href="{href}" tabindex="500" title="{title}" class="{css}" {status}>{icon} {label}</a>';
              //noinspection HtmlUnknownAttribute
              tBtnBrowse = '<div tabindex="500" class="{css}" {status}>{icon} {label}</div>';
              tModalLabel = $h.MODAL_ID + 'Label';
              tModalMain = '<div id="' + $h.MODAL_ID + '" class="file-zoom-dialog modal fade" ' +
                  'tabindex="-1" aria-labelledby="' + tModalLabel + '"></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" id="' + tModalLabel + '">{heading}</h5>\n' +
                  '      <span class="kv-zoom-title"></span>\n' +
                  '      <div class="kv-zoom-actions">{toggleheader}{fullscreen}{borderless}{close}</div>\n' +
                  '    </div>\n' +
                  '    <div class="modal-body">\n' +
                  '      <div class="floating-buttons"></div>\n' +
                  '      <div class="kv-zoom-body file-zoom-content {zoomFrameClass}"></div>\n' + '{prev} {next}\n' +
                  '    </div>\n' +
                  '  </div>\n' +
                  '</div>\n';
              tProgress = '<div class="progress">\n' +
                  '    <div class="{class}" role="progressbar"' +
                  ' aria-valuenow="{percent}" aria-valuemin="0" aria-valuemax="100" style="width:{percent}%;">\n' +
                  '        {status}\n' +
                  '     </div>\n' +
                  '</div>{stats}';
              tStats = '<div class="text-info file-upload-stats">' +
                  '<span class="pending-time">{pendingTime}</span> ' +
                  '<span class="upload-speed">{uploadSpeed}</span>' +
                  '</div>';
              tSize = ' <samp>({sizeText})</samp>';
              tFooter = '<div class="file-thumbnail-footer">\n' +
                  '    <div class="file-footer-caption" title="{caption}">\n' +
                  '        <div class="file-caption-info">{caption}</div>\n' +
                  '        <div class="file-size-info">{size}</div>\n' +
                  '    </div>\n' +
                  '    {progress}\n{indicator}\n{actions}\n' +
                  '</div>';
              tActions = '<div class="file-actions">\n' +
                  '    <div class="file-footer-buttons">\n' +
                  '        {download} {upload} {delete} {zoom} {other}' +
                  '    </div>\n' +
                  '</div>\n' +
                  '{drag}\n' +
                  '<div class="clearfix"></div>';
              //noinspection HtmlUnknownAttribute
              tActionDelete = '<button type="button" class="kv-file-remove {removeClass}" ' +
                  'title="{removeTitle}" {dataUrl}{dataKey}>{removeIcon}</button>\n';
              tActionUpload = '<button type="button" class="kv-file-upload {uploadClass}" title="{uploadTitle}">' +
                  '{uploadIcon}</button>';
              tActionDownload = '<a class="kv-file-download {downloadClass}" title="{downloadTitle}" ' +
                  'href="{downloadUrl}" download="{caption}" target="_blank">{downloadIcon}</a>';
              tActionZoom = '<button type="button" class="kv-file-zoom {zoomClass}" ' +
                  'title="{zoomTitle}">{zoomIcon}</button>';
              tActionDrag = '<span class="file-drag-handle {dragClass}" title="{dragTitle}">{dragIcon}</span>';
              tIndicator = '<div class="file-upload-indicator" title="{indicatorTitle}">{indicator}</div>';
              tTagBef = '<div class="file-preview-frame {frameClass}" id="{previewId}" data-fileindex="{fileindex}"' +
                  ' data-fileid="{fileid}" data-template="{template}"';
              tTagBef1 = tTagBef + '><div class="kv-file-content">\n';
              tTagBef2 = tTagBef + ' title="{caption}"><div class="kv-file-content">\n';
              tTagAft = '</div>{footer}\n{zoomCache}</div>\n';
              tGeneric = '{content}\n';
              tStyle = ' {style}';
              tHtml = renderObject('html', 'text/html');
              tText = renderObject('text', 'text/plain;charset=UTF-8');
              tPdf = renderObject('pdf', 'application/pdf');
              tImage = '<img src="{data}" class="file-preview-image kv-preview-data" title="{title}" alt="{alt}"' +
                  tStyle + '>\n';
              tOffice = '<iframe class="kv-preview-data file-preview-office" ' +
                  'src="https://view.officeapps.live.com/op/embed.aspx?src={data}"' + tStyle + '></iframe>';
              tGdocs = '<iframe class="kv-preview-data file-preview-gdocs" ' +
                  'src="https://docs.google.com/gview?url={data}&embedded=true"' + tStyle + '></iframe>';
              tVideo = '<video class="kv-preview-data file-preview-video" controls' + tStyle + '>\n' +
                  '<source src="{data}" type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</video>\n';
              tAudio = '<!--suppress ALL --><audio class="kv-preview-data file-preview-audio" controls' + tStyle + '>\n<source src="{data}" ' +
                  'type="{type}">\n' + $h.DEFAULT_PREVIEW + '\n</audio>\n';
              tFlash = '<embed class="kv-preview-data file-preview-flash" src="{data}" type="application/x-shockwave-flash"' + tStyle + '>\n';
              tObject = '<object class="kv-preview-data file-preview-object file-object {typeCss}" ' +
                  'data="{data}" type="{type}"' + tStyle + '>\n' + '<param name="movie" value="{caption}" />\n' +
                  $h.OBJECT_PARAMS + ' ' + $h.DEFAULT_PREVIEW + '\n</object>\n';
              tOther = '<div class="kv-preview-data file-preview-other-frame"' + tStyle + '>\n' + $h.DEFAULT_PREVIEW + '\n</div>\n';
              tZoomCache = '<div class="kv-zoom-cache">{zoomContent}</div>';
              vDefaultDim = {width: '100%', height: '100%', 'min-height': '480px'};
              if (self._isPdfRendered()) {
                  tPdf = self.pdfRendererTemplate.replace('{renderer}', self._encodeURI(self.pdfRendererUrl));
              }
              self.defaults = {
                  layoutTemplates: {
                      main1: tMain1,
                      main2: tMain2,
                      preview: tPreview,
                      close: tClose,
                      fileIcon: tFileIcon,
                      caption: tCaption,
                      modalMain: tModalMain,
                      modal: tModal,
                      progress: tProgress,
                      stats: tStats,
                      size: tSize,
                      footer: tFooter,
                      indicator: tIndicator,
                      actions: tActions,
                      actionDelete: tActionDelete,
                      actionUpload: tActionUpload,
                      actionDownload: tActionDownload,
                      actionZoom: tActionZoom,
                      actionDrag: tActionDrag,
                      btnDefault: tBtnDefault,
                      btnLink: tBtnLink,
                      btnBrowse: tBtnBrowse,
                      zoomCache: tZoomCache
                  },
                  previewMarkupTags: {
                      tagBefore1: tTagBef1,
                      tagBefore2: tTagBef2,
                      tagAfter: tTagAft
                  },
                  previewContentTemplates: {
                      generic: tGeneric,
                      html: tHtml,
                      image: tImage,
                      text: tText,
                      office: tOffice,
                      gdocs: tGdocs,
                      video: tVideo,
                      audio: tAudio,
                      flash: tFlash,
                      object: tObject,
                      pdf: tPdf,
                      other: tOther
                  },
                  allowedPreviewTypes: ['image', 'html', 'text', 'video', 'audio', 'flash', 'pdf', 'object'],
                  previewTemplates: {},
                  previewSettings: {
                      image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                      html: {width: '213px', height: '160px'},
                      text: {width: '213px', height: '160px'},
                      office: {width: '213px', height: '160px'},
                      gdocs: {width: '213px', height: '160px'},
                      video: {width: '213px', height: '160px'},
                      audio: {width: '100%', height: '30px'},
                      flash: {width: '213px', height: '160px'},
                      object: {width: '213px', height: '160px'},
                      pdf: {width: '100%', height: '160px', 'position': 'relative'},
                      other: {width: '213px', height: '160px'}
                  },
                  previewSettingsSmall: {
                      image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                      html: {width: '100%', height: '160px'},
                      text: {width: '100%', height: '160px'},
                      office: {width: '100%', height: '160px'},
                      gdocs: {width: '100%', height: '160px'},
                      video: {width: '100%', height: 'auto'},
                      audio: {width: '100%', height: '30px'},
                      flash: {width: '100%', height: 'auto'},
                      object: {width: '100%', height: 'auto'},
                      pdf: {width: '100%', height: '160px'},
                      other: {width: '100%', height: '160px'}
                  },
                  previewZoomSettings: {
                      image: {width: 'auto', height: 'auto', 'max-width': '100%', 'max-height': '100%'},
                      html: vDefaultDim,
                      text: vDefaultDim,
                      office: {width: '100%', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                      gdocs: {width: '100%', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                      video: {width: 'auto', height: '100%', 'max-width': '100%'},
                      audio: {width: '100%', height: '30px'},
                      flash: {width: 'auto', height: '480px'},
                      object: {width: 'auto', height: '100%', 'max-width': '100%', 'min-height': '480px'},
                      pdf: vDefaultDim,
                      other: {width: 'auto', height: '100%', 'min-height': '480px'}
                  },
                  mimeTypeAliases: {
                      'video/quicktime': 'video/mp4'
                  },
                  fileTypeSettings: {
                      image: function (vType, vName) {
                          return ($h.compare(vType, 'image.*') && !$h.compare(vType, /(tiff?|wmf)$/i) ||
                              $h.compare(vName, /\.(gif|png|jpe?g)$/i));
                      },
                      html: function (vType, vName) {
                          return $h.compare(vType, 'text/html') || $h.compare(vName, /\.(htm|html)$/i);
                      },
                      office: function (vType, vName) {
                          return $h.compare(vType, /(word|excel|powerpoint|office)$/i) ||
                              $h.compare(vName, /\.(docx?|xlsx?|pptx?|pps|potx?)$/i);
                      },
                      gdocs: function (vType, vName) {
                          return $h.compare(vType, /(word|excel|powerpoint|office|iwork-pages|tiff?)$/i) ||
                              $h.compare(vName,
                                  /\.(docx?|xlsx?|pptx?|pps|potx?|rtf|ods|odt|pages|ai|dxf|ttf|tiff?|wmf|e?ps)$/i);
                      },
                      text: function (vType, vName) {
                          return $h.compare(vType, 'text.*') || $h.compare(vName, /\.(xml|javascript)$/i) ||
                              $h.compare(vName, /\.(txt|md|nfo|ini|json|php|js|css)$/i);
                      },
                      video: function (vType, vName) {
                          return $h.compare(vType, 'video.*') && ($h.compare(vType, /(ogg|mp4|mp?g|mov|webm|3gp)$/i) ||
                              $h.compare(vName, /\.(og?|mp4|webm|mp?g|mov|3gp)$/i));
                      },
                      audio: function (vType, vName) {
                          return $h.compare(vType, 'audio.*') && ($h.compare(vName, /(ogg|mp3|mp?g|wav)$/i) ||
                              $h.compare(vName, /\.(og?|mp3|mp?g|wav)$/i));
                      },
                      flash: function (vType, vName) {
                          return $h.compare(vType, 'application/x-shockwave-flash', true) || $h.compare(vName,
                              /\.(swf)$/i);
                      },
                      pdf: function (vType, vName) {
                          return $h.compare(vType, 'application/pdf', true) || $h.compare(vName, /\.(pdf)$/i);
                      },
                      object: function () {
                          return true;
                      },
                      other: function () {
                          return true;
                      }
                  },
                  fileActionSettings: {
                      showRemove: true,
                      showUpload: true,
                      showDownload: true,
                      showZoom: true,
                      showDrag: true,
                      removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
                      removeClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                      removeErrorClass: 'btn btn-sm btn-kv btn-danger',
                      removeTitle: 'Remove file',
                      uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
                      uploadClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                      uploadTitle: 'Upload file',
                      uploadRetryIcon: '<i class="glyphicon glyphicon-repeat"></i>',
                      uploadRetryTitle: 'Retry upload',
                      downloadIcon: '<i class="glyphicon glyphicon-download"></i>',
                      downloadClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                      downloadTitle: 'Download file',
                      zoomIcon: '<i class="glyphicon glyphicon-zoom-in"></i>',
                      zoomClass: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
                      zoomTitle: 'View Details',
                      dragIcon: '<i class="glyphicon glyphicon-move"></i>',
                      dragClass: 'text-info',
                      dragTitle: 'Move / Rearrange',
                      dragSettings: {},
                      indicatorNew: '<i class="glyphicon glyphicon-plus-sign text-warning"></i>',
                      indicatorSuccess: '<i class="glyphicon glyphicon-ok-sign text-success"></i>',
                      indicatorError: '<i class="glyphicon glyphicon-exclamation-sign text-danger"></i>',
                      indicatorLoading: '<i class="glyphicon glyphicon-hourglass text-muted"></i>',
                      indicatorPaused: '<i class="glyphicon glyphicon-pause text-primary"></i>',
                      indicatorNewTitle: 'Not uploaded yet',
                      indicatorSuccessTitle: 'Uploaded',
                      indicatorErrorTitle: 'Upload Error',
                      indicatorLoadingTitle: 'Uploading &hellip;',
                      indicatorPausedTitle: 'Upload Paused'
                  }
              };
              $.each(self.defaults, function (key, setting) {
                  if (key === 'allowedPreviewTypes') {
                      if (self.allowedPreviewTypes === undefined) {
                          self.allowedPreviewTypes = setting;
                      }
                      return;
                  }
                  self[key] = $.extend(true, {}, setting, self[key]);
              });
              self._initPreviewTemplates();
          },
          _initPreviewTemplates: function () {
              var self = this, tags = self.previewMarkupTags, tagBef, tagAft = tags.tagAfter;
              $.each(self.previewContentTemplates, function (key, value) {
                  if ($h.isEmpty(self.previewTemplates[key])) {
                      tagBef = tags.tagBefore2;
                      if (key === 'generic' || key === 'image') {
                          tagBef = tags.tagBefore1;
                      }
                      if (self._isPdfRendered() && key === 'pdf') {
                          tagBef = tagBef.replace('kv-file-content', 'kv-file-content kv-pdf-rendered');
                      }
                      self.previewTemplates[key] = tagBef + value + tagAft;
                  }
              });
          },
          _initPreviewCache: function () {
              var self = this;
              self.previewCache = {
                  data: {},
                  init: function () {
                      var content = self.initialPreview;
                      if (content.length > 0 && !$h.isArray(content)) {
                          content = content.split(self.initialPreviewDelimiter);
                      }
                      self.previewCache.data = {
                          content: content,
                          config: self.initialPreviewConfig,
                          tags: self.initialPreviewThumbTags
                      };
                  },
                  count: function (skipNull) {
                      if (!self.previewCache.data || !self.previewCache.data.content) {
                          return 0;
                      }
                      if (skipNull) {
                          var chk = self.previewCache.data.content.filter(function (n) {
                              return n !== null;
                          });
                          return chk.length;
                      }
                      return self.previewCache.data.content.length;
                  },
                  get: function (i, isDisabled) {
                      var ind = $h.INIT_FLAG + i, data = self.previewCache.data, config = data.config[i],
                          content = data.content[i], out, $tmp, cat, ftr,
                          fname, ftype, frameClass, asData = $h.ifSet('previewAsData', config, self.initialPreviewAsData),
                          a = config ? {title: config.title || null, alt: config.alt || null} : {title: null, alt: null},
                          parseTemplate = function (cat, dat, fname, ftype, ftr, ind, fclass, t) {
                              var fc = ' file-preview-initial ' + $h.SORT_CSS + (fclass ? ' ' + fclass : ''),
                                  id = self.previewInitId + '-' + ind,
                                  fileId = config && config.fileId || id;
                              /** @namespace config.zoomData */
                              return self._generatePreviewTemplate(cat, dat, fname, ftype, id, fileId, false, null, fc,
                                  ftr, ind, t, a, config && config.zoomData || dat);
                          };
                      if (!content || !content.length) {
                          return '';
                      }
                      isDisabled = isDisabled === undefined ? true : isDisabled;
                      cat = $h.ifSet('type', config, self.initialPreviewFileType || 'generic');
                      fname = $h.ifSet('filename', config, $h.ifSet('caption', config));
                      ftype = $h.ifSet('filetype', config, cat);
                      ftr = self.previewCache.footer(i, isDisabled, (config && config.size || null));
                      frameClass = $h.ifSet('frameClass', config);
                      if (asData) {
                          out = parseTemplate(cat, content, fname, ftype, ftr, ind, frameClass);
                      } else {
                          out = parseTemplate('generic', content, fname, ftype, ftr, ind, frameClass, cat)
                              .setTokens({'content': data.content[i]});
                      }
                      if (data.tags.length && data.tags[i]) {
                          out = $h.replaceTags(out, data.tags[i]);
                      }
                      /** @namespace config.frameAttr */
                      if (!$h.isEmpty(config) && !$h.isEmpty(config.frameAttr)) {
                          $tmp = $h.createElement(out);
                          $tmp.find('.file-preview-initial').attr(config.frameAttr);
                          out = $tmp.html();
                          $tmp.remove();
                      }
                      return out;
                  },
                  clean: function (data) {
                      data.content = $h.cleanArray(data.content);
                      data.config = $h.cleanArray(data.config);
                      data.tags = $h.cleanArray(data.tags);
                      self.previewCache.data = data;
                  },
                  add: function (content, config, tags, append) {
                      var data = self.previewCache.data, index;
                      if (!content || !content.length) {
                          return 0;
                      }
                      index = content.length - 1;
                      if (!$h.isArray(content)) {
                          content = content.split(self.initialPreviewDelimiter);
                      }
                      if (append && data.content) {
                          index = data.content.push(content[0]) - 1;
                          data.config[index] = config;
                          data.tags[index] = tags;
                      } else {
                          data.content = content;
                          data.config = config;
                          data.tags = tags;
                      }
                      self.previewCache.clean(data);
                      return index;
                  },
                  set: function (content, config, tags, append) {
                      var data = self.previewCache.data, i, chk;
                      if (!content || !content.length) {
                          return;
                      }
                      if (!$h.isArray(content)) {
                          content = content.split(self.initialPreviewDelimiter);
                      }
                      chk = content.filter(function (n) {
                          return n !== null;
                      });
                      if (!chk.length) {
                          return;
                      }
                      if (data.content === undefined) {
                          data.content = [];
                      }
                      if (data.config === undefined) {
                          data.config = [];
                      }
                      if (data.tags === undefined) {
                          data.tags = [];
                      }
                      if (append) {
                          for (i = 0; i < content.length; i++) {
                              if (content[i]) {
                                  data.content.push(content[i]);
                              }
                          }
                          for (i = 0; i < config.length; i++) {
                              if (config[i]) {
                                  data.config.push(config[i]);
                              }
                          }
                          for (i = 0; i < tags.length; i++) {
                              if (tags[i]) {
                                  data.tags.push(tags[i]);
                              }
                          }
                      } else {
                          data.content = content;
                          data.config = config;
                          data.tags = tags;
                      }
                      self.previewCache.clean(data);
                  },
                  unset: function (index) {
                      var chk = self.previewCache.count(), rev = self.reversePreviewOrder;
                      if (!chk) {
                          return;
                      }
                      if (chk === 1) {
                          self.previewCache.data.content = [];
                          self.previewCache.data.config = [];
                          self.previewCache.data.tags = [];
                          self.initialPreview = [];
                          self.initialPreviewConfig = [];
                          self.initialPreviewThumbTags = [];
                          return;
                      }
                      self.previewCache.data.content = $h.spliceArray(self.previewCache.data.content, index, rev);
                      self.previewCache.data.config = $h.spliceArray(self.previewCache.data.config, index, rev);
                      self.previewCache.data.tags = $h.spliceArray(self.previewCache.data.tags, index, rev);
                      var data = $.extend(true, {}, self.previewCache.data);
                      self.previewCache.clean(data);
                  },
                  out: function () {
                      var html = '', caption, len = self.previewCache.count(), i, content;
                      if (len === 0) {
                          return {content: '', caption: ''};
                      }
                      for (i = 0; i < len; i++) {
                          content = self.previewCache.get(i);
                          html = self.reversePreviewOrder ? (content + html) : (html + content);
                      }
                      caption = self._getMsgSelected(len);
                      return {content: html, caption: caption};
                  },
                  footer: function (i, isDisabled, size) {
                      var data = self.previewCache.data || {};
                      if ($h.isEmpty(data.content)) {
                          return '';
                      }
                      if ($h.isEmpty(data.config) || $h.isEmpty(data.config[i])) {
                          data.config[i] = {};
                      }
                      isDisabled = isDisabled === undefined ? true : isDisabled;
                      var config = data.config[i], caption = $h.ifSet('caption', config), a,
                          width = $h.ifSet('width', config, 'auto'), url = $h.ifSet('url', config, false),
                          key = $h.ifSet('key', config, null), fileId = $h.ifSet('fileId', config, null),
                          fs = self.fileActionSettings, initPreviewShowDel = self.initialPreviewShowDelete || false,
                          downloadInitialUrl = !self.initialPreviewDownloadUrl ? '' :
                              self.initialPreviewDownloadUrl + '?key=' + key + (fileId ? '&fileId=' + fileId : ''),
                          dUrl = config.downloadUrl || downloadInitialUrl,
                          dFil = config.filename || config.caption || '',
                          initPreviewShowDwl = !!(dUrl),
                          sDel = $h.ifSet('showRemove', config, initPreviewShowDel),
                          sDwl = $h.ifSet('showDownload', config, $h.ifSet('showDownload', fs, initPreviewShowDwl)),
                          sZm = $h.ifSet('showZoom', config, $h.ifSet('showZoom', fs, true)),
                          sDrg = $h.ifSet('showDrag', config, $h.ifSet('showDrag', fs, true)),
                          dis = (url === false) && isDisabled;
                      sDwl = sDwl && config.downloadUrl !== false && !!dUrl;
                      a = self._renderFileActions(config, false, sDwl, sDel, sZm, sDrg, dis, url, key, true, dUrl, dFil);
                      return self._getLayoutTemplate('footer').setTokens({
                          'progress': self._renderThumbProgress(),
                          'actions': a,
                          'caption': caption,
                          'size': self._getSize(size),
                          'width': width,
                          'indicator': ''
                      });
                  }
              };
              self.previewCache.init();
          },
          _isPdfRendered: function () {
              var self = this, useLib = self.usePdfRenderer,
                  flag = typeof useLib === 'function' ? useLib() : !!useLib;
              return flag && self.pdfRendererUrl;
          },
          _handler: function ($el, event, callback) {
              var self = this, ns = self.namespace, ev = event.split(' ').join(ns + ' ') + ns;
              if (!$el || !$el.length) {
                  return;
              }
              $el.off(ev).on(ev, callback);
          },
          _encodeURI: function (vUrl) {
              var self = this;
              return self.encodeUrl ? encodeURI(vUrl) : vUrl;
          },
          _log: function (msg, tokens) {
              var self = this, id = self.$element.attr('id');
              if (!self.showConsoleLogs) {
                  return;
              }
              if (id) {
                  msg = '"' + id + '": ' + msg;
              }
              msg = 'bootstrap-fileinput: ' + msg;
              if (typeof tokens === 'object') {
                  msg = msg.setTokens(tokens);
              }
              if (window.console && typeof window.console.log !== 'undefined') {
                  window.console.log(msg);
              } else {
                  window.alert(msg);
              }
          },
          _validate: function () {
              var self = this, status = self.$element.attr('type') === 'file';
              if (!status) {
                  self._log($h.logMessages.badInputType);
              }
              return status;
          },
          _errorsExist: function () {
              var self = this, $err, $errList = self.$errorContainer.find('li');
              if ($errList.length) {
                  return true;
              }
              $err = $h.createElement(self.$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) {
                  $h.setHtml($error, self.errorCloseButton + msg);
                  self._handler($error.find('.kv-error-close'), 'click', function () {
                      setTimeout(function () {
                          if (self.showPreview && !self.getFrames().length) {
                              self.clear();
                          }
                          $error.fadeOut('slow');
                      }, self.processDelay);
                  });
              }
          },
          _setValidationError: function (css) {
              var self = this;
              css = (css ? css + ' ' : '') + 'has-error';
              self.$container.removeClass(css).addClass('has-error');
              $h.addCss(self.$captionContainer, 'is-invalid');
          },
          _resetErrors: function (fade) {
              var self = this, $error = self.$errorContainer, history = self.resumableUploadOptions.retainErrorHistory;
              if (self.isPersistentError || (self.enableResumableUpload && history)) {
                  return;
              }
              self.isError = false;
              self.$container.removeClass('has-error');
              self.$captionContainer.removeClass('is-invalid');
              $error.html('');
              if (fade) {
                  $error.fadeOut('slow');
              } else {
                  $error.hide();
              }
          },
          _showFolderError: function (folders) {
              var self = this, $error = self.$errorContainer, msg;
              if (!folders) {
                  return;
              }
              if (!self.isAjaxUpload) {
                  self._clearFileInput();
              }
              msg = self.msgFoldersNotAllowed.replace('{n}', folders);
              self._addError(msg);
              self._setValidationError();
              $error.fadeIn(self.fadeDelay);
              self._raise('filefoldererror', [folders, msg]);
          },
          _showFileError: function (msg, params, event) {
              var self = this, $error = self.$errorContainer, ev = event || 'fileuploaderror',
                  fId = params && params.fileId || '', e = params && params.id ?
                  '<li data-thumb-id="' + params.id + '" data-file-id="' + fId + '">' + msg + '</li>' : '<li>' + msg + '</li>';
  
              if ($error.find('ul').length === 0) {
                  self._addError('<ul>' + e + '</ul>');
              } else {
                  $error.find('ul').append(e);
              }
              $error.fadeIn(self.fadeDelay);
              self._raise(ev, [params, msg]);
              self._setValidationError('file-input-new');
              return true;
          },
          _showError: function (msg, params, event) {
              var self = this, $error = self.$errorContainer, ev = event || 'fileerror';
              params = params || {};
              params.reader = self.reader;
              self._addError(msg);
              $error.fadeIn(self.fadeDelay);
              self._raise(ev, [params, msg]);
              if (!self.isAjaxUpload) {
                  self._clearFileInput();
              }
              self._setValidationError('file-input-new');
              self.$btnUpload.attr('disabled', true);
              return true;
          },
          _noFilesError: function (params) {
              var self = this, label = self.minFileCount > 1 ? self.filePlural : self.fileSingle,
                  msg = self.msgFilesTooLess.replace('{n}', self.minFileCount).replace('{files}', label),
                  $error = self.$errorContainer;
              msg = '<li>' + msg + '</li>';
              if ($error.find('ul').length === 0) {
                  self._addError('<ul>' + msg + '</ul>');
              } else {
                  $error.find('ul').append(msg);
              }
              self.isError = true;
              self._updateFileDetails(0);
              $error.fadeIn(self.fadeDelay);
              self._raise('fileerror', [params, msg]);
              self._clearFileInput();
              self._setValidationError();
          },
          _parseError: function (operation, jqXHR, errorThrown, fileName) {
              /** @namespace jqXHR.responseJSON */
              var self = this, errMsg = $.trim(errorThrown + ''), textPre, errText, text;
              errText = jqXHR.responseJSON && jqXHR.responseJSON.error ? jqXHR.responseJSON.error.toString() : '';
              text = errText ? errText : jqXHR.responseText;
              if (self.cancelling && self.msgUploadAborted) {
                  errMsg = self.msgUploadAborted;
              }
              if (self.showAjaxErrorDetails && text) {
                  if (errText) {
                      errMsg = $.trim(errText + '');
                  } else {
                      text = $.trim(text.replace(/\n\s*\n/g, '\n'));
                      textPre = text.length ? '<pre>' + text + '</pre>' : '';
                      errMsg += errMsg ? textPre : text;
                  }
              }
              if (!errMsg) {
                  errMsg = self.msgAjaxError.replace('{operation}', operation);
              }
              self.cancelling = false;
              return fileName ? '<b>' + fileName + ': </b>' + errMsg : errMsg;
          },
          _parseFileType: function (type, name) {
              var self = this, isValid, vType, cat, i, types = self.allowedPreviewTypes || [];
              if (type === 'application/text-plain') {
                  return 'text';
              }
              for (i = 0; i < types.length; i++) {
                  cat = types[i];
                  isValid = self.fileTypeSettings[cat];
                  vType = isValid(type, name) ? cat : '';
                  if (!$h.isEmpty(vType)) {
                      return vType;
                  }
              }
              return 'other';
          },
          _getPreviewIcon: function (fname) {
              var self = this, ext, out = null;
              if (fname && fname.indexOf('.') > -1) {
                  ext = fname.split('.').pop();
                  if (self.previewFileIconSettings) {
                      out = self.previewFileIconSettings[ext] || self.previewFileIconSettings[ext.toLowerCase()] || null;
                  }
                  if (self.previewFileExtSettings) {
                      $.each(self.previewFileExtSettings, function (key, func) {
                          if (self.previewFileIconSettings[key] && func(ext)) {
                              out = self.previewFileIconSettings[key];
                              //noinspection UnnecessaryReturnStatementJS
                              return;
                          }
                      });
                  }
              }
              return out || self.previewFileIcon;
          },
          _parseFilePreviewIcon: function (content, fname) {
              var self = this, icn = self._getPreviewIcon(fname), out = content;
              if (out.indexOf('{previewFileIcon}') > -1) {
                  out = out.setTokens({'previewFileIconClass': self.previewFileIconClass, 'previewFileIcon': icn});
              }
              return out;
          },
          _raise: function (event, params) {
              var self = this, e = $.Event(event);
              if (params !== undefined) {
                  self.$element.trigger(e, params);
              } else {
                  self.$element.trigger(e);
              }
              if (e.isDefaultPrevented() || e.result === false) {
                  return false;
              }
              switch (event) {
                  // ignore these events
                  case 'filebatchuploadcomplete':
                  case 'filebatchuploadsuccess':
                  case 'fileuploaded':
                  case 'fileclear':
                  case 'filecleared':
                  case 'filereset':
                  case 'fileerror':
                  case 'filefoldererror':
                  case 'fileuploaderror':
                  case 'filebatchuploaderror':
                  case 'filedeleteerror':
                  case 'filecustomerror':
                  case 'filesuccessremove':
                      break;
                  // receive data response via `filecustomerror` event`
                  default:
                      if (!self.ajaxAborted) {
                          self.ajaxAborted = e.result;
                      }
                      break;
              }
              return true;
          },
          _listenFullScreen: function (isFullScreen) {
              var self = this, $modal = self.$modal, $btnFull, $btnBord;
              if (!$modal || !$modal.length) {
                  return;
              }
              $btnFull = $modal && $modal.find('.btn-fullscreen');
              $btnBord = $modal && $modal.find('.btn-borderless');
              if (!$btnFull.length || !$btnBord.length) {
                  return;
              }
              $btnFull.removeClass('active').attr('aria-pressed', 'false');
              $btnBord.removeClass('active').attr('aria-pressed', 'false');
              if (isFullScreen) {
                  $btnFull.addClass('active').attr('aria-pressed', 'true');
              } else {
                  $btnBord.addClass('active').attr('aria-pressed', 'true');
              }
              if ($modal.hasClass('file-zoom-fullscreen')) {
                  self._maximizeZoomDialog();
              } else {
                  if (isFullScreen) {
                      self._maximizeZoomDialog();
                  } else {
                      $btnBord.removeClass('active').attr('aria-pressed', 'false');
                  }
              }
          },
          _listen: function () {
              var self = this, $el = self.$element, $form = self.$form, $cont = self.$container, fullScreenEv, $cap, fn;
              self._handler($el, 'click', function (e) {
                  if ($el.hasClass('file-no-browse')) {
                      if ($el.data('zoneClicked')) {
                          $el.data('zoneClicked', false);
                      } else {
                          e.preventDefault();
                      }
                  }
              });
              self._handler($el, 'change', $.proxy(self._change, self));
              if (self.showBrowse) {
                  self._handler(self.$btnFile, 'click', $.proxy(self._browse, self));
              }
              $cap = $cont.find('.file-caption-name');
              fn = function () {
                  return false;
              };
              self._handler($cont.find('.fileinput-remove:not([disabled])'), 'click', $.proxy(self.clear, self));
              self._handler($cont.find('.fileinput-cancel'), 'click', $.proxy(self.cancel, self));
              self._handler($cont.find('.fileinput-pause'), 'click', $.proxy(self.pause, self));
              self._handler($cap, 'keydown', fn);
              self._handler($cap, 'paste', fn);
              self._initDragDrop();
              self._handler($form, 'reset', $.proxy(self.clear, self));
              if (!self.isAjaxUpload) {
                  self._handler($form, 'submit', $.proxy(self._submitForm, self));
              }
              self._handler(self.$container.find('.fileinput-upload'), 'click', $.proxy(self._uploadClick, self));
              self._handler($(window), 'resize', function () {
                  self._listenFullScreen(screen.width === window.innerWidth && screen.height === window.innerHeight);
              });
              fullScreenEv = 'webkitfullscreenchange mozfullscreenchange fullscreenchange MSFullscreenChange';
              self._handler($(document), fullScreenEv, function () {
                  self._listenFullScreen($h.checkFullScreen());
              });
              self._autoFitContent();
              self._initClickable();
              self._refreshPreview();
          },
          _autoFitContent: function () {
              var width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                  self = this, config = width < 400 ? (self.previewSettingsSmall || self.defaults.previewSettingsSmall) :
                  (self.previewSettings || self.defaults.previewSettings), sel;
              $.each(config, function (cat, settings) {
                  sel = '.file-preview-frame .file-preview-' + cat;
                  self.$preview.find(sel + '.kv-preview-data,' + sel + ' .kv-preview-data').css(settings);
              });
          },
          _scanDroppedItems: function (item, files, path) {
              path = path || '';
              var self = this, i, dirReader, readDir, errorHandler = function (e) {
                  self._log($h.logMessages.badDroppedFiles);
                  self._log(e);
              };
              if (item.isFile) {
                  item.file(function (file) {
                      if (path) {
                          file.newPath = path + file.name;
                      }
                      files.push(file);
                  }, errorHandler);
              } else {
                  if (item.isDirectory) {
                      dirReader = item.createReader();
                      readDir = function () {
                          dirReader.readEntries(function (entries) {
                              if (entries && entries.length > 0) {
                                  for (i = 0; i < entries.length; i++) {
                                      self._scanDroppedItems(entries[i], files, path + item.name + '/');
                                  }
                                  // recursively call readDir() again, since browser can only handle first 100 entries.
                                  readDir();
                              }
                              return null;
                          }, errorHandler);
                      };
                      readDir();
                  }
              }
  
          },
          _initDragDrop: function () {
              var self = this, $zone = self.$dropZone;
              if (self.dropZoneEnabled && self.showPreview) {
                  self._handler($zone, 'dragenter dragover', $.proxy(self._zoneDragEnter, self));
                  self._handler($zone, 'dragleave', $.proxy(self._zoneDragLeave, self));
                  self._handler($zone, 'drop', $.proxy(self._zoneDrop, self));
                  self._handler($(document), 'dragenter dragover drop', self._zoneDragDropInit);
              }
          },
          _zoneDragDropInit: function (e) {
              e.stopPropagation();
              e.preventDefault();
          },
          _zoneDragEnter: function (e) {
              var self = this, dt = e.originalEvent.dataTransfer, hasFiles = $.inArray('Files', dt.types) > -1;
              self._zoneDragDropInit(e);
              if (self.isDisabled || !hasFiles) {
                  dt.effectAllowed = 'none';
                  dt.dropEffect = 'none';
                  return;
              }
              dt.dropEffect = 'copy';
              if (self._raise('fileDragEnter', {'sourceEvent': e, 'files': dt.types.Files})) {
                  $h.addCss(self.$dropZone, 'file-highlighted');
              }
          },
          _zoneDragLeave: function (e) {
              var self = this;
              self._zoneDragDropInit(e);
              if (self.isDisabled) {
                  return;
              }
              if (self._raise('fileDragLeave', {'sourceEvent': e})) {
                  self.$dropZone.removeClass('file-highlighted');
              }
  
          },
          _zoneDrop: function (e) {
              /** @namespace e.originalEvent.dataTransfer */
              var self = this, i, $el = self.$element, dt = e.originalEvent.dataTransfer,
                  files = dt.files, items = dt.items, folders = $h.getDragDropFolders(items),
                  processFiles = function () {
                      if (!self.isAjaxUpload) {
                          self.changeTriggered = true;
                          $el.get(0).files = files;
                          setTimeout(function () {
                              self.changeTriggered = false;
                              $el.trigger('change' + self.namespace);
                          }, self.processDelay);
                      } else {
                          self._change(e, files);
                      }
                      self.$dropZone.removeClass('file-highlighted');
                  };
              e.preventDefault();
              if (self.isDisabled || $h.isEmpty(files)) {
                  return;
              }
              if (!self._raise('fileDragDrop', {'sourceEvent': e, 'files': files})) {
                  return;
              }
              if (folders > 0) {
                  if (!self.isAjaxUpload) {
                      self._showFolderError(folders);
                      return;
                  }
                  files = [];
                  for (i = 0; i < items.length; i++) {
                      var item = items[i].webkitGetAsEntry();
                      if (item) {
                          self._scanDroppedItems(item, files);
                      }
                  }
                  setTimeout(function () {
                      processFiles();
                  }, 500);
              } else {
                  processFiles();
              }
          },
          _uploadClick: function (e) {
              var self = this, $btn = self.$container.find('.fileinput-upload'), $form,
                  isEnabled = !$btn.hasClass('disabled') && $h.isEmpty($btn.attr('disabled'));
              if (e && e.isDefaultPrevented()) {
                  return;
              }
              if (!self.isAjaxUpload) {
                  if (isEnabled && $btn.attr('type') !== 'submit') {
                      $form = $btn.closest('form');
                      // downgrade to normal form submit if possible
                      if ($form.length) {
                          $form.trigger('submit');
                      }
                      e.preventDefault();
                  }
                  return;
              }
              e.preventDefault();
              if (isEnabled) {
                  self.upload();
              }
          },
          _submitForm: function () {
              var self = this;
              return self._isFileSelectionValid() && !self._abort({});
          },
          _clearPreview: function () {
              var self = this,
                  $thumbs = self.showUploadedThumbs ? self.getFrames(':not(.file-preview-success)') : self.getFrames();
              $thumbs.each(function () {
                  var $thumb = $(this);
                  $thumb.remove();
              });
              if (!self.getFrames().length || !self.showPreview) {
                  self._resetUpload();
              }
              self._validateDefaultPreview();
          },
          _initSortable: function () {
              var self = this, $el = self.$preview, settings, selector = '.' + $h.SORT_CSS, $cont, $body = $('body'),
                  $html = $('html'), rev = self.reversePreviewOrder, Sortable = window.Sortable, beginGrab, endGrab;
              if (!Sortable || $el.find(selector).length === 0) {
                  return;
              }
              $cont = $body.length ? $body : ($html.length ? $html : self.$container);
              beginGrab = function () {
                  $cont.addClass('file-grabbing');
              };
              endGrab = function () {
                  $cont.removeClass('file-grabbing');
              };
              settings = {
                  handle: '.drag-handle-init',
                  dataIdAttr: 'data-fileid',
                  animation: 600,
                  draggable: selector,
                  scroll: false,
                  forceFallback: true,
                  onChoose: beginGrab,
                  onStart: beginGrab,
                  onUnchoose: endGrab,
                  onEnd: endGrab,
                  onSort: function (e) {
                      var oldIndex = e.oldIndex, newIndex = e.newIndex, i = 0, len = self.initialPreviewConfig.length,
                          exceedsLast = len > 0 && newIndex >= len, $item = $(e.item), $first;
                      if (exceedsLast) {
                          newIndex = len - 1;
                      }
                      self.initialPreview = $h.moveArray(self.initialPreview, oldIndex, newIndex, rev);
                      self.initialPreviewConfig = $h.moveArray(self.initialPreviewConfig, oldIndex, newIndex, rev);
                      self.previewCache.init();
                      self.getFrames('.file-preview-initial').each(function () {
                          $(this).attr('data-fileindex', $h.INIT_FLAG + i);
                          i++;
                      });
                      if (exceedsLast) {
                          $first = self.getFrames(':not(.file-preview-initial):first');
                          if ($first.length) {
                              $item.slideUp(function () {
                                  $item.insertBefore($first).slideDown();
                              });
                          }
                      }
                      self._raise('filesorted', {
                          previewId: $item.attr('id'),
                          'oldIndex': oldIndex,
                          'newIndex': newIndex,
                          stack: self.initialPreviewConfig
                      });
                  },
              };
              $.extend(true, settings, self.fileActionSettings.dragSettings);
              if (self.sortable) {
                  self.sortable.destroy();
              }
              self.sortable = Sortable.create($el[0], settings);
          },
          _setPreviewContent: function (content) {
              var self = this;
              $h.setHtml(self.$preview, content);
              self._autoFitContent();
          },
          _initPreviewImageOrientations: function () {
              var self = this, i = 0, canOrientImage = self.canOrientImage;
              if (!self.autoOrientImageInitial && !canOrientImage) {
                  return;
              }
              self.getFrames('.file-preview-initial').each(function () {
                  var $thumb = $(this), $img, $zoomImg, id, config = self.initialPreviewConfig[i];
                  /** @namespace config.exif */
                  if (config && config.exif && config.exif.Orientation) {
                      id = $thumb.attr('id');
                      $img = $thumb.find('>.kv-file-content img');
                      $zoomImg = self._getZoom(id, ' >.kv-file-content img');
                      if (canOrientImage) {
                          $img.css('image-orientation', (self.autoOrientImageInitial ? 'from-image' : 'none'));
                      } else {
                          self.setImageOrientation($img, $zoomImg, config.exif.Orientation, $thumb);
                      }
                  }
                  i++;
              });
          },
          _initPreview: function (isInit) {
              var self = this, cap = self.initialCaption || '', out;
              if (!self.previewCache.count(true)) {
                  self._clearPreview();
                  if (isInit) {
                      self._setCaption(cap);
                  } else {
                      self._initCaption();
                  }
                  return;
              }
              out = self.previewCache.out();
              cap = isInit && self.initialCaption ? self.initialCaption : out.caption;
              self._setPreviewContent(out.content);
              self._setInitThumbAttr();
              self._setCaption(cap);
              self._initSortable();
              if (!$h.isEmpty(out.content)) {
                  self.$container.removeClass('file-input-new');
              }
              self._initPreviewImageOrientations();
          },
          _getZoomButton: function (type) {
              var self = this, label = self.previewZoomButtonIcons[type], css = self.previewZoomButtonClasses[type],
                  title = ' title="' + (self.previewZoomButtonTitles[type] || '') + '" ',
                  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) {
                  if (e.namespace !== 'bs.modal') {
                      return;
                  }
                  var $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless');
                  if ($modal.data('fileinputPluginId') === self.$element.attr('id')) {
                      self._raise('filezoom' + event, getParams(e));
                  }
                  if (event === 'shown') {
                      $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 = $h.createElement($h.cspBuffer.stash(modalMain)).insertAfter(self.$container);
                  self.$modal = $(modalId).insertBefore($dialog);
                  $h.cspBuffer.apply(self.$modal);
                  $dialog.remove();
              }
              $h.initModal(self.$modal);
              self.$modal.html($h.cspBuffer.stash(self._getModalContent()));
              $h.cspBuffer.apply(self.$modal);
              $.each($h.MODAL_EVENTS, function (key, event) {
                  self._listenModalEvent(event);
              });
          },
          _initZoomButtons: function () {
              var self = this, previewId = self.$modal.data('previewId') || '', $first, $last,
                  thumbs = self.getFrames().toArray(), len = thumbs.length, $prev = self.$modal.find('.btn-prev'),
                  $next = self.$modal.find('.btn-next');
              if (thumbs.length < 2) {
                  $prev.hide();
                  $next.hide();
                  return;
              } else {
                  $prev.show();
                  $next.show();
              }
              if (!len) {
                  return;
              }
              $first = $(thumbs[0]);
              $last = $(thumbs[len - 1]);
              $prev.removeAttr('disabled');
              $next.removeAttr('disabled');
              if ($first.length && $first.attr('id') === previewId) {
                  $prev.attr('disabled', true);
              }
              if ($last.length && $last.attr('id') === previewId) {
                  $next.attr('disabled', true);
              }
          },
          _maximizeZoomDialog: function () {
              var self = this, $modal = self.$modal, $head = $modal.find('.modal-header:visible'),
                  $foot = $modal.find('.modal-footer:visible'), $body = $modal.find('.modal-body'),
                  h = $(window).height(), diff = 0;
              $modal.addClass('file-zoom-fullscreen');
              if ($head && $head.length) {
                  h -= $head.outerHeight(true);
              }
              if ($foot && $foot.length) {
                  h -= $foot.outerHeight(true);
              }
              if ($body && $body.length) {
                  diff = $body.outerHeight(true) - $body.height();
                  h -= diff;
              }
              $modal.find('.kv-zoom-body').height(h);
          },
          _resizeZoomDialog: function (fullScreen) {
              var self = this, $modal = self.$modal, $btnFull = $modal.find('.btn-fullscreen'),
                  $btnBord = $modal.find('.btn-borderless');
              if ($modal.hasClass('file-zoom-fullscreen')) {
                  $h.toggleFullScreen(false);
                  if (!fullScreen) {
                      if (!$btnFull.hasClass('active')) {
                          $modal.removeClass('file-zoom-fullscreen');
                          self.$modal.find('.kv-zoom-body').css('height', self.zoomModalHeight);
                      } else {
                          $btnFull.removeClass('active').attr('aria-pressed', 'false');
                      }
                  } else {
                      if (!$btnFull.hasClass('active')) {
                          $modal.removeClass('file-zoom-fullscreen');
                          self._resizeZoomDialog(true);
                          if ($btnBord.hasClass('active')) {
                              $btnBord.removeClass('active').attr('aria-pressed', 'false');
                          }
                      }
                  }
              } else {
                  if (!fullScreen) {
                      self._maximizeZoomDialog();
                      return;
                  }
                  $h.toggleFullScreen(true);
              }
              $modal.focus();
          },
          _setZoomContent: function ($frame, animate) {
              var self = this, $content, tmplt, body, title, $body, $dataEl, config, previewId = $frame.attr('id'),
                  $zoomPreview = self._getZoom(previewId), $modal = self.$modal, $tmp,
                  $btnFull = $modal.find('.btn-fullscreen'), $btnBord = $modal.find('.btn-borderless'), cap, size,
                  $btnTogh = $modal.find('.btn-toggleheader');
              tmplt = $zoomPreview.attr('data-template') || 'generic';
              $content = $zoomPreview.find('.kv-file-content');
              body = $content.length ? $content.html() : '';
              cap = $frame.data('caption') || '';
              size = $frame.data('size') || '';
              title = cap + ' ' + size;
              $modal.find('.kv-zoom-title').attr('title', $('<div/>').html(title).text()).html(title);
              $body = $modal.find('.kv-zoom-body');
              $modal.removeClass('kv-single-content');
              if (animate) {
                  $tmp = $body.addClass('file-thumb-loading').clone().insertAfter($body);
                  $h.setHtml($body, body).hide();
                  $tmp.fadeOut('fast', function () {
                      $body.fadeIn('fast', function () {
                          $body.removeClass('file-thumb-loading');
                      });
                      $tmp.remove();
                  });
              } else {
                  $h.setHtml($body, body);
              }
              config = self.previewZoomSettings[tmplt];
              if (config) {
                  $dataEl = $body.find('.kv-preview-data');
                  $h.addCss($dataEl, 'file-zoom-detail');
                  $.each(config, function (key, value) {
                      $dataEl.css(key, value);
                      if (($dataEl.attr('width') && key === 'width') || ($dataEl.attr('height') && key === 'height')) {
                          $dataEl.removeAttr(key);
                      }
                  });
              }
              $modal.data('previewId', previewId);
              self._handler($modal.find('.btn-prev'), 'click', function () {
                  self._zoomSlideShow('prev', previewId);
              });
              self._handler($modal.find('.btn-next'), 'click', function () {
                  self._zoomSlideShow('next', previewId);
              });
              self._handler($btnFull, 'click', function () {
                  self._resizeZoomDialog(true);
              });
              self._handler($btnBord, 'click', function () {
                  self._resizeZoomDialog(false);
              });
              self._handler($btnTogh, 'click', function () {
                  var $header = $modal.find('.modal-header'), $floatBar = $modal.find('.modal-body .floating-buttons'),
                      ht, $actions = $header.find('.kv-zoom-actions'), resize = function (height) {
                          var $body = self.$modal.find('.kv-zoom-body'), h = self.zoomModalHeight;
                          if ($modal.hasClass('file-zoom-fullscreen')) {
                              h = $body.outerHeight(true);
                              if (!height) {
                                  h = h - $header.outerHeight(true);
                              }
                          }
                          $body.css('height', height ? h + height : h);
                      };
                  if ($header.is(':visible')) {
                      ht = $header.outerHeight(true);
                      $header.slideUp('slow', function () {
                          $actions.find('.btn').appendTo($floatBar);
                          resize(ht);
                      });
                  } else {
                      $floatBar.find('.btn').appendTo($actions);
                      $header.slideDown('slow', function () {
                          resize();
                      });
                  }
                  $modal.focus();
              });
              self._handler($modal, 'keydown', function (e) {
                  var key = e.which || e.keyCode, $prev = $(this).find('.btn-prev'), $next = $(this).find('.btn-next'),
                      vId = $(this).data('previewId'), vPrevKey = self.rtl ? 39 : 37, vNextKey = self.rtl ? 37 : 39;
                  if (key === vPrevKey && $prev.length && !$prev.attr('disabled')) {
                      self._zoomSlideShow('prev', vId);
                  }
                  if (key === vNextKey && $next.length && !$next.attr('disabled')) {
                      self._zoomSlideShow('next', vId);
                  }
              });
          },
          _showModal: function ($frame) {
              var self = this, $modal = self.$modal;
              if (!$frame || !$frame.length) {
                  return;
              }
              $h.initModal($modal);
              $h.setHtml($modal, self._getModalContent());
              self._setZoomContent($frame);
              $modal.data('fileinputPluginId', self.$element.attr('id'));
              $modal.modal('show');
              self._initZoomButtons();
          },
          _zoomPreview: function ($btn) {
              var self = this, $frame;
              if (!$btn.length) {
                  throw 'Cannot zoom to detailed preview!';
              }
              $frame = $btn.closest($h.FRAMES);
              self._showModal($frame);
          },
          _zoomSlideShow: function (dir, previewId) {
              var self = this, $btn = self.$modal.find('.kv-zoom-actions .btn-' + dir), $targFrame, i, $thumb,
                  thumbsData = self.getFrames().toArray(), thumbs = [], len = thumbsData.length, out;
              if ($btn.attr('disabled')) {
                  return;
              }
              for (i = 0; i < len; i++) {
                  $thumb = $(thumbsData[i]);
                  if ($thumb && $thumb.length && $thumb.find('.kv-file-zoom:visible').length) {
                      thumbs.push(thumbsData[i]);
                  }
              }
              len = thumbs.length;
              for (i = 0; i < len; i++) {
                  if ($(thumbs[i]).attr('id') === previewId) {
                      out = dir === 'prev' ? i - 1 : i + 1;
                      break;
                  }
              }
              if (out < 0 || out >= len || !thumbs[out]) {
                  return;
              }
              $targFrame = $(thumbs[out]);
              if ($targFrame.length) {
                  self._setZoomContent($targFrame, true);
              }
              self._initZoomButtons();
              self._raise('filezoom' + dir, {'previewId': previewId, modal: self.$modal});
          },
          _initZoomButton: function () {
              var self = this;
              self.$preview.find('.kv-file-zoom').each(function () {
                  var $el = $(this);
                  self._handler($el, 'click', function () {
                      self._zoomPreview($el);
                  });
              });
          },
          _inputFileCount: function () {
              return this.$element[0].files.length;
          },
          _refreshPreview: function () {
              var self = this, files;
              if ((!self._inputFileCount() && !self.isAjaxUpload) || !self.showPreview || !self.isPreviewable) {
                  return;
              }
              if (self.isAjaxUpload) {
                  if (self.fileManager.count() > 0) {
                      files = $.extend(true, {}, self.getFileList());
                      self.fileManager.clear();
                      self._clearFileInput();
                  } else {
                      files = self.$element[0].files;
                  }
              } else {
                  files = self.$element[0].files;
              }
              if (files && files.length) {
                  self.readFiles(files);
                  self._setFileDropZoneTitle();
              }
          },
          _clearObjects: function ($el) {
              $el.find('video audio').each(function () {
                  this.pause();
                  $(this).remove();
              });
              $el.find('img object div').each(function () {
                  $(this).remove();
              });
          },
          _clearFileInput: function () {
              var self = this, $el = self.$element, $srcFrm, $tmpFrm, $tmpEl;
              if (!self._inputFileCount()) {
                  return;
              }
              $srcFrm = $el.closest('form');
              $tmpFrm = $(document.createElement('form'));
              $tmpEl = $(document.createElement('div'));
              $el.before($tmpEl);
              if ($srcFrm.length) {
                  $srcFrm.after($tmpFrm);
              } else {
                  $tmpEl.after($tmpFrm);
              }
              $tmpFrm.append($el).trigger('reset');
              $tmpEl.before($el).remove();
              $tmpFrm.remove();
          },
          _resetUpload: function () {
              var self = this;
              self.uploadStartTime = $h.now();
              self.uploadCache = [];
              self.$btnUpload.removeAttr('disabled');
              self._setProgress(0);
              self._hideProgress();
              self._resetErrors(false);
              self._initAjax();
              self.fileManager.clearImages();
              self._resetCanvas();
              if (self.overwriteInitial) {
                  self.initialPreview = [];
                  self.initialPreviewConfig = [];
                  self.initialPreviewThumbTags = [];
                  self.previewCache.data = {
                      content: [],
                      config: [],
                      tags: []
                  };
              }
          },
          _resetCanvas: function () {
              var self = this;
              if (self.canvas && self.imageCanvasContext) {
                  self.imageCanvasContext.clearRect(0, 0, self.canvas.width, self.canvas.height);
              }
          },
          _hasInitialPreview: function () {
              var self = this;
              return !self.overwriteInitial && self.previewCache.count(true);
          },
          _resetPreview: function () {
              var self = this, out, cap, $div, hasSuc = self.showUploadedThumbs, hasErr = !self.removeFromPreviewOnError,
                  includeProcessed = (hasSuc || hasErr) && self.isDuplicateError;
              if (self.previewCache.count(true)) {
                  out = self.previewCache.out();
                  if (includeProcessed) {
                      $div = $h.createElement('').insertAfter(self.$container);
                      self.getFrames().each(function () {
                          var $thumb = $(this);
                          if ((hasSuc && $thumb.hasClass('file-preview-success')) ||
                              (hasErr && $thumb.hasClass('file-preview-error'))) {
                              $div.append($thumb);
                          }
                      });
                  }
                  self._setPreviewContent(out.content);
                  self._setInitThumbAttr();
                  cap = self.initialCaption ? self.initialCaption : out.caption;
                  self._setCaption(cap);
                  if (includeProcessed) {
                      $div.contents().appendTo(self.$preview);
                      $div.remove();
                  }
              } else {
                  self._clearPreview();
                  self._initCaption();
              }
              if (self.showPreview) {
                  self._initZoom();
                  self._initSortable();
              }
              self.isDuplicateError = false;
          },
          _clearDefaultPreview: function () {
              var self = this;
              self.$preview.find('.file-default-preview').remove();
          },
          _validateDefaultPreview: function () {
              var self = this;
              if (!self.showPreview || $h.isEmpty(self.defaultPreviewContent)) {
                  return;
              }
              self._setPreviewContent('<div class="file-default-preview">' + self.defaultPreviewContent + '</div>');
              self.$container.removeClass('file-input-new');
              self._initClickable();
          },
          _resetPreviewThumbs: function (isAjax) {
              var self = this, out;
              if (isAjax) {
                  self._clearPreview();
                  self.clearFileStack();
                  return;
              }
              if (self._hasInitialPreview()) {
                  out = self.previewCache.out();
                  self._setPreviewContent(out.content);
                  self._setInitThumbAttr();
                  self._setCaption(out.caption);
                  self._initPreviewActions();
              } else {
                  self._clearPreview();
              }
          },
          _getLayoutTemplate: function (t) {
              var self = this, template = self.layoutTemplates[t];
              if ($h.isEmpty(self.customLayoutTags)) {
                  return template;
              }
              return $h.replaceTags(template, self.customLayoutTags);
          },
          _getPreviewTemplate: function (t) {
              var self = this, templates = self.previewTemplates, template = templates[t] || templates.other;
              if ($h.isEmpty(self.customPreviewTags)) {
                  return template;
              }
              return $h.replaceTags(template, self.customPreviewTags);
          },
          _getOutData: function (formdata, jqXHR, responseData, filesData) {
              var self = this;
              jqXHR = jqXHR || {};
              responseData = responseData || {};
              filesData = filesData || self.fileManager.list();
              return {
                  formdata: formdata,
                  files: filesData,
                  filenames: self.filenames,
                  filescount: self.getFilesCount(),
                  extra: self._getExtraData(),
                  response: responseData,
                  reader: self.reader,
                  jqXHR: jqXHR
              };
          },
          _getMsgSelected: function (n) {
              var self = this, strFiles = n === 1 ? self.fileSingle : self.filePlural;
              return n > 0 ? self.msgSelected.replace('{n}', n).replace('{files}', strFiles) : self.msgNoFilesSelected;
          },
          _getFrame: function (id, skipWarning) {
              var self = this, $frame = $h.getFrameElement(self.$preview, id);
              if (self.showPreview && !skipWarning && !$frame.length) {
                  self._log($h.logMessages.invalidThumb, {id: id});
              }
              return $frame;
          },
          _getZoom: function (id, selector) {
              var self = this, $frame = $h.getZoomElement(self.$preview, id, selector);
              if (self.showPreview && !$frame.length) {
                  self._log($h.logMessages.invalidThumb, {id: id});
              }
              return $frame;
          },
          _getThumbs: function (css) {
              css = css || '';
              return this.getFrames(':not(.file-preview-initial)' + css);
          },
          _getThumbId: function (fileId) {
              var self = this;
              return self.previewInitId + '-' + fileId;
          },
          _getExtraData: function (fileId, index) {
              var self = this, data = self.uploadExtraData;
              if (typeof self.uploadExtraData === 'function') {
                  data = self.uploadExtraData(fileId, index);
              }
              return data;
          },
          _initXhr: function (xhrobj, fileId) {
              var self = this, fm = self.fileManager, func = function (event) {
                  var pct = 0, total = event.total, loaded = event.loaded || event.position,
                      stats = fm.getUploadStats(fileId, loaded, total);
                  /** @namespace event.lengthComputable */
                  if (event.lengthComputable && !self.enableResumableUpload) {
                      pct = $h.round(loaded / total * 100);
                  }
                  if (fileId) {
                      self._setFileUploadStats(fileId, pct, stats);
                  } else {
                      self._setProgress(pct, null, null, self._getStats(stats));
                  }
                  self._raise('fileajaxprogress', [stats]);
              };
              if (xhrobj.upload) {
                  if (self.progressDelay) {
                      func = $h.debounce(func, self.progressDelay);
                  }
                  xhrobj.upload.addEventListener('progress', func, false);
              }
              return xhrobj;
          },
          _initAjaxSettings: function () {
              var self = this;
              self._ajaxSettings = $.extend(true, {}, self.ajaxSettings);
              self._ajaxDeleteSettings = $.extend(true, {}, self.ajaxDeleteSettings);
          },
          _mergeAjaxCallback: function (funcName, srcFunc, type) {
              var self = this, settings = self._ajaxSettings, flag = self.mergeAjaxCallbacks, targFunc;
              if (type === 'delete') {
                  settings = self._ajaxDeleteSettings;
                  flag = self.mergeAjaxDeleteCallbacks;
              }
              targFunc = settings[funcName];
              if (flag && typeof targFunc === 'function') {
                  if (flag === 'before') {
                      settings[funcName] = function () {
                          targFunc.apply(this, arguments);
                          srcFunc.apply(this, arguments);
                      };
                  } else {
                      settings[funcName] = function () {
                          srcFunc.apply(this, arguments);
                          targFunc.apply(this, arguments);
                      };
                  }
              } else {
                  settings[funcName] = srcFunc;
              }
          },
          _ajaxSubmit: function (fnBefore, fnSuccess, fnComplete, fnError, formdata, fileId, index, vUrl) {
              var self = this, settings, defaults, data, ajaxTask;
              if (!self._raise('filepreajax', [formdata, fileId, index])) {
                  return;
              }
              formdata.append('initialPreview', JSON.stringify(self.initialPreview));
              formdata.append('initialPreviewConfig', JSON.stringify(self.initialPreviewConfig));
              formdata.append('initialPreviewThumbTags', JSON.stringify(self.initialPreviewThumbTags));
              self._initAjaxSettings();
              self._mergeAjaxCallback('beforeSend', fnBefore);
              self._mergeAjaxCallback('success', fnSuccess);
              self._mergeAjaxCallback('complete', fnComplete);
              self._mergeAjaxCallback('error', fnError);
              vUrl = vUrl || self.uploadUrlThumb || self.uploadUrl;
              if (typeof vUrl === 'function') {
                  vUrl = vUrl();
              }
              data = self._getExtraData(fileId, index) || {};
              if (typeof data === 'object') {
                  $.each(data, function (key, value) {
                      formdata.append(key, value);
                  });
              }
              defaults = {
                  xhr: function () {
                      var xhrobj = $.ajaxSettings.xhr();
                      return self._initXhr(xhrobj, fileId);
                  },
                  url: self._encodeURI(vUrl),
                  type: 'POST',
                  dataType: 'json',
                  data: formdata,
                  cache: false,
                  processData: false,
                  contentType: false
              };
              settings = $.extend(true, {}, defaults, self._ajaxSettings);
              ajaxTask = self.taskManager.addTask(fileId + '-' + index, function () {
                  var self = this.self, config, xhr;
                  config = self.ajaxQueue.shift();
                  xhr = $.ajax(config);
                  self.ajaxRequests.push(xhr);
              });
              self.ajaxQueue.push(settings);
              ajaxTask.runWithContext({self: self});
          },
          _mergeArray: function (prop, content) {
              var self = this, arr1 = $h.cleanArray(self[prop]), arr2 = $h.cleanArray(content);
              self[prop] = arr1.concat(arr2);
          },
          _initUploadSuccess: function (out, $thumb, allFiles) {
              var self = this, append, data, index, $div, $newCache, content, config, tags, id, i;
              if (!self.showPreview || typeof out !== 'object' || $.isEmptyObject(out)) {
                  self._resetCaption();
                  return;
              }
              if (out.initialPreview !== undefined && out.initialPreview.length > 0) {
                  self.hasInitData = true;
                  content = out.initialPreview || [];
                  config = out.initialPreviewConfig || [];
                  tags = out.initialPreviewThumbTags || [];
                  append = out.append === undefined || out.append;
                  if (content.length > 0 && !$h.isArray(content)) {
                      content = content.split(self.initialPreviewDelimiter);
                  }
                  if (content.length) {
                      self._mergeArray('initialPreview', content);
                      self._mergeArray('initialPreviewConfig', config);
                      self._mergeArray('initialPreviewThumbTags', tags);
                  }
                  if ($thumb !== undefined) {
                      if (!allFiles) {
                          index = self.previewCache.add(content[0], config[0], tags[0], append);
                          data = self.previewCache.get(index, false);
                          $div = $h.createElement(data).hide().appendTo($thumb);
                          $newCache = $div.find('.kv-zoom-cache');
                          if ($newCache && $newCache.length) {
                              $newCache.appendTo($thumb);
                          }
                          $thumb.fadeOut('slow', function () {
                              var $newThumb = $div.find('.file-preview-frame');
                              if ($newThumb && $newThumb.length) {
                                  $newThumb.insertBefore($thumb).fadeIn('slow').css('display:inline-block');
                              }
                              self._initPreviewActions();
                              self._clearFileInput();
                              $thumb.remove();
                              $div.remove();
                              self._initSortable();
                          });
                      } else {
                          id = $thumb.attr('id');
                          i = self._getUploadCacheIndex(id);
                          if (i !== null) {
                              self.uploadCache[i] = {
                                  id: id,
                                  content: content[0],
                                  config: config[0] || [],
                                  tags: tags[0] || [],
                                  append: append
                              };
                          }
                      }
                  } else {
                      self.previewCache.set(content, config, tags, append);
                      self._initPreview();
                      self._initPreviewActions();
                  }
              }
              self._resetCaption();
          },
          _getUploadCacheIndex: function (id) {
              var self = this, i, len = self.uploadCache.length, config;
              for (i = 0; i < len; i++) {
                  config = self.uploadCache[i];
                  if (config.id === id) {
                      return i;
                  }
              }
              return null;
          },
          _initSuccessThumbs: function () {
              var self = this;
              if (!self.showPreview) {
                  return;
              }
              self._getThumbs($h.FRAMES + '.file-preview-success').each(function () {
                  var $thumb = $(this), $remove = $thumb.find('.kv-file-remove');
                  $remove.removeAttr('disabled');
                  self._handler($remove, 'click', function () {
                      var id = $thumb.attr('id'),
                          out = self._raise('filesuccessremove', [id, $thumb.attr('data-fileindex')]);
                      $h.cleanMemory($thumb);
                      if (out === false) {
                          return;
                      }
                      $thumb.fadeOut('slow', function () {
                          $thumb.remove();
                          if (!self.getFrames().length) {
                              self.reset();
                          }
                      });
                  });
              });
          },
          _updateInitialPreview: function () {
              var self = this, u = self.uploadCache;
              if (self.showPreview) {
                  $.each(u, function (key, setting) {
                      self.previewCache.add(setting.content, setting.config, setting.tags, setting.append);
                  });
                  if (self.hasInitData) {
                      self._initPreview();
                      self._initPreviewActions();
                  }
              }
          },
          _getThumbFileId: function ($thumb) {
              var self = this;
              if (self.showPreview && $thumb !== undefined) {
                  return $thumb.attr('data-fileid');
              }
              return null;
          },
          _getThumbFile: function ($thumb) {
              var self = this, id = self._getThumbFileId($thumb);
              return id ? self.fileManager.getFile(id) : null;
          },
          _uploadSingle: function (i, id, isBatch) {
              var self = this, fm = self.fileManager, count = fm.count(), formdata = new FormData(), outData,
                  previewId = self._getThumbId(id), $thumb, chkComplete, $btnUpload, $btnDelete,
                  hasPostData = count > 0 || !$.isEmptyObject(self.uploadExtraData), uploadFailed, $prog, fnBefore,
                  errMsg, fnSuccess, fnComplete, fnError, updateUploadLog, op = self.ajaxOperations.uploadThumb,
                  fileObj = fm.getFile(id), params = {id: previewId, index: i, fileId: id},
                  fileName = self.fileManager.getFileName(id, true);
              if (self.enableResumableUpload) { // not enabled for resumable uploads
                  return;
              }
              if (self.showPreview) {
                  $thumb = fm.getThumb(id);
                  $prog = $thumb.find('.file-thumb-progress');
                  $btnUpload = $thumb.find('.kv-file-upload');
                  $btnDelete = $thumb.find('.kv-file-remove');
                  $prog.show();
              }
              if (count === 0 || !hasPostData || (self.showPreview && $btnUpload && $btnUpload.hasClass('disabled')) ||
                  self._abort(params)) {
                  return;
              }
              updateUploadLog = function () {
                  if (!uploadFailed) {
                      fm.removeFile(id);
                  } else {
                      fm.errors.push(id);
                  }
                  fm.setProcessed(id);
                  if (fm.isProcessed()) {
                      self.fileBatchCompleted = true;
                      chkComplete();
                  }
              };
              chkComplete = function () {
                  var $initThumbs;
                  if (!self.fileBatchCompleted) {
                      return;
                  }
                  setTimeout(function () {
                      var triggerReset = fm.count() === 0, errCount = fm.errors.length;
                      self._updateInitialPreview();
                      self.unlock(triggerReset);
                      if (triggerReset) {
                          self._clearFileInput();
                      }
                      $initThumbs = self.$preview.find('.file-preview-initial');
                      if (self.uploadAsync && $initThumbs.length) {
                          $h.addCss($initThumbs, $h.SORT_CSS);
                          self._initSortable();
                      }
                      self._raise('filebatchuploadcomplete', [fm.stack, self._getExtraData()]);
                      if (!self.retryErrorUploads || errCount === 0) {
                          fm.clear();
                      }
                      self._setProgress(101);
                      self.ajaxAborted = false;
                  }, self.processDelay);
              };
              fnBefore = function (jqXHR) {
                  outData = self._getOutData(formdata, jqXHR);
                  fm.initStats(id);
                  self.fileBatchCompleted = false;
                  if (!isBatch) {
                      self.ajaxAborted = false;
                  }
                  if (self.showPreview) {
                      if (!$thumb.hasClass('file-preview-success')) {
                          self._setThumbStatus($thumb, 'Loading');
                          $h.addCss($thumb, 'file-uploading');
                      }
                      $btnUpload.attr('disabled', true);
                      $btnDelete.attr('disabled', true);
                  }
                  if (!isBatch) {
                      self.lock();
                  }
                  if (fm.errors.indexOf(id) !== -1) {
                      delete fm.errors[id];
                  }
                  self._raise('filepreupload', [outData, previewId, i, self._getThumbFileId($thumb)]);
                  $.extend(true, params, outData);
                  if (self._abort(params)) {
                      jqXHR.abort();
                      if (!isBatch) {
                          self._setThumbStatus($thumb, 'New');
                          $thumb.removeClass('file-uploading');
                          $btnUpload.removeAttr('disabled');
                          $btnDelete.removeAttr('disabled');
                          self.unlock();
                      }
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  var pid = self.showPreview && $thumb.attr('id') ? $thumb.attr('id') : previewId;
                  outData = self._getOutData(formdata, jqXHR, data);
                  $.extend(true, params, outData);
                  setTimeout(function () {
                      if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                          if (self.showPreview) {
                              self._setThumbStatus($thumb, 'Success');
                              $btnUpload.hide();
                              self._initUploadSuccess(data, $thumb, isBatch);
                              self._setProgress(101, $prog);
                          }
                          self._raise('fileuploaded', [outData, pid, i, self._getThumbFileId($thumb)]);
                          if (!isBatch) {
                              self.fileManager.remove($thumb);
                          } else {
                              updateUploadLog();
                          }
                      } else {
                          uploadFailed = true;
                          errMsg = self._parseError(op, jqXHR, self.msgUploadError, self.fileManager.getFileName(id));
                          self._showFileError(errMsg, params);
                          self._setPreviewError($thumb, true);
                          if (!self.retryErrorUploads) {
                              $btnUpload.hide();
                          }
                          if (isBatch) {
                              updateUploadLog();
                          }
                          self._setProgress(101, self._getFrame(pid).find('.file-thumb-progress'),
                              self.msgUploadError);
                      }
                  }, self.processDelay);
              };
              fnComplete = function () {
                  if (self.showPreview) {
                      $btnUpload.removeAttr('disabled');
                      $btnDelete.removeAttr('disabled');
                      $thumb.removeClass('file-uploading');
                  }
                  if (!isBatch) {
                      self.unlock(false);
                      self._clearFileInput();
                  } else {
                      chkComplete();
                  }
                  self._initSuccessThumbs();
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  errMsg = self._parseError(op, jqXHR, errorThrown, self.fileManager.getFileName(id));
                  uploadFailed = true;
                  setTimeout(function () {
                      var $prog;
                      if (isBatch) {
                          updateUploadLog();
                      }
                      self.fileManager.setProgress(id, 100);
                      self._setPreviewError($thumb, true);
                      if (!self.retryErrorUploads) {
                          $btnUpload.hide();
                      }
                      $.extend(true, params, self._getOutData(formdata, jqXHR));
                      self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
                      $prog = self.showPreview && $thumb ? $thumb.find('.file-thumb-progress') : '';
                      self._setProgress(101, $prog, self.msgUploadError);
                      self._showFileError(errMsg, params);
                  }, self.processDelay);
              };
              self._setFileData(formdata, fileObj.file, fileName, id);
              self._setUploadData(formdata, {fileId: id});
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata, id, i);
          },
          _setFileData: function (formdata, file, fileName, fileId) {
              var self = this, preProcess = self.preProcessUpload;
              if (preProcess && typeof preProcess === 'function') {
                  formdata.append(self.uploadFileAttr, preProcess(fileId, file));
              } else {
                  formdata.append(self.uploadFileAttr, file, fileName);
              }
          },
          _uploadBatch: function () {
              var self = this, fm = self.fileManager, total = fm.total(), params = {}, fnBefore, fnSuccess, fnError,
                  fnComplete, hasPostData = total > 0 || !$.isEmptyObject(self.uploadExtraData), errMsg,
                  setAllUploaded, formdata = new FormData(), op = self.ajaxOperations.uploadBatch;
              if (total === 0 || !hasPostData || self._abort(params)) {
                  return;
              }
              setAllUploaded = function () {
                  self.fileManager.clear();
                  self._clearFileInput();
              };
              fnBefore = function (jqXHR) {
                  self.lock();
                  fm.initStats();
                  var outData = self._getOutData(formdata, jqXHR);
                  self.ajaxAborted = false;
                  if (self.showPreview) {
                      self._getThumbs().each(function () {
                          var $thumb = $(this), $btnUpload = $thumb.find('.kv-file-upload'),
                              $btnDelete = $thumb.find('.kv-file-remove');
                          if (!$thumb.hasClass('file-preview-success')) {
                              self._setThumbStatus($thumb, 'Loading');
                              $h.addCss($thumb, 'file-uploading');
                          }
                          $btnUpload.attr('disabled', true);
                          $btnDelete.attr('disabled', true);
                      });
                  }
                  self._raise('filebatchpreupload', [outData]);
                  if (self._abort(outData)) {
                      jqXHR.abort();
                      self._getThumbs().each(function () {
                          var $thumb = $(this), $btnUpload = $thumb.find('.kv-file-upload'),
                              $btnDelete = $thumb.find('.kv-file-remove');
                          if ($thumb.hasClass('file-preview-loading')) {
                              self._setThumbStatus($thumb, 'New');
                              $thumb.removeClass('file-uploading');
                          }
                          $btnUpload.removeAttr('disabled');
                          $btnDelete.removeAttr('disabled');
                      });
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  /** @namespace data.errorkeys */
                  var outData = self._getOutData(formdata, jqXHR, data), key = 0,
                      $thumbs = self._getThumbs(':not(.file-preview-success)'),
                      keys = $h.isEmpty(data) || $h.isEmpty(data.errorkeys) ? [] : data.errorkeys;
  
                  if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                      self._raise('filebatchuploadsuccess', [outData]);
                      setAllUploaded();
                      if (self.showPreview) {
                          $thumbs.each(function () {
                              var $thumb = $(this);
                              self._setThumbStatus($thumb, 'Success');
                              $thumb.removeClass('file-uploading');
                              $thumb.find('.kv-file-upload').hide().removeAttr('disabled');
                          });
                          self._initUploadSuccess(data);
                      } else {
                          self.reset();
                      }
                      self._setProgress(101);
                  } else {
                      if (self.showPreview) {
                          $thumbs.each(function () {
                              var $thumb = $(this);
                              $thumb.removeClass('file-uploading');
                              $thumb.find('.kv-file-upload').removeAttr('disabled');
                              $thumb.find('.kv-file-remove').removeAttr('disabled');
                              if (keys.length === 0 || $.inArray(key, keys) !== -1) {
                                  self._setPreviewError($thumb, true);
                                  if (!self.retryErrorUploads) {
                                      $thumb.find('.kv-file-upload').hide();
                                      self.fileManager.remove($thumb);
                                  }
                              } else {
                                  $thumb.find('.kv-file-upload').hide();
                                  self._setThumbStatus($thumb, 'Success');
                                  self.fileManager.remove($thumb);
                              }
                              if (!$thumb.hasClass('file-preview-error') || self.retryErrorUploads) {
                                  key++;
                              }
                          });
                          self._initUploadSuccess(data);
                      }
                      errMsg = self._parseError(op, jqXHR, self.msgUploadError);
                      self._showFileError(errMsg, outData, 'filebatchuploaderror');
                      self._setProgress(101, self.$progress, self.msgUploadError);
                  }
              };
              fnComplete = function () {
                  self.unlock();
                  self._initSuccessThumbs();
                  self._clearFileInput();
                  self._raise('filebatchuploadcomplete', [self.fileManager.stack, self._getExtraData()]);
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  var outData = self._getOutData(formdata, jqXHR);
                  errMsg = self._parseError(op, jqXHR, errorThrown);
                  self._showFileError(errMsg, outData, 'filebatchuploaderror');
                  self.uploadFileCount = total - 1;
                  if (!self.showPreview) {
                      return;
                  }
                  self._getThumbs().each(function () {
                      var $thumb = $(this);
                      $thumb.removeClass('file-uploading');
                      if (self._getThumbFile($thumb)) {
                          self._setPreviewError($thumb);
                      }
                  });
                  self._getThumbs().removeClass('file-uploading');
                  self._getThumbs(' .kv-file-upload').removeAttr('disabled');
                  self._getThumbs(' .kv-file-delete').removeAttr('disabled');
                  self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
              };
              var ctr = 0;
              $.each(self.fileManager.stack, function (key, data) {
                  if (!$h.isEmpty(data.file)) {
                      self._setFileData(formdata, data.file, (data.nameFmt || ('untitled_' + ctr)), key);
                  }
                  ctr++;
              });
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata);
          },
          _uploadExtraOnly: function () {
              var self = this, params = {}, fnBefore, fnSuccess, fnComplete, fnError, formdata = new FormData(), errMsg,
                  op = self.ajaxOperations.uploadExtra;
              if (self._abort(params)) {
                  return;
              }
              fnBefore = function (jqXHR) {
                  self.lock();
                  var outData = self._getOutData(formdata, jqXHR);
                  self._raise('filebatchpreupload', [outData]);
                  self._setProgress(50);
                  params.data = outData;
                  params.xhr = jqXHR;
                  if (self._abort(params)) {
                      jqXHR.abort();
                      self._setProgressCancelled();
                  }
              };
              fnSuccess = function (data, textStatus, jqXHR) {
                  var outData = self._getOutData(formdata, jqXHR, data);
                  if ($h.isEmpty(data) || $h.isEmpty(data.error)) {
                      self._raise('filebatchuploadsuccess', [outData]);
                      self._clearFileInput();
                      self._initUploadSuccess(data);
                      self._setProgress(101);
                  } else {
                      errMsg = self._parseError(op, jqXHR, self.msgUploadError);
                      self._showFileError(errMsg, outData, 'filebatchuploaderror');
                  }
              };
              fnComplete = function () {
                  self.unlock();
                  self._clearFileInput();
                  self._raise('filebatchuploadcomplete', [self.fileManager.stack, self._getExtraData()]);
              };
              fnError = function (jqXHR, textStatus, errorThrown) {
                  var outData = self._getOutData(formdata, jqXHR);
                  errMsg = self._parseError(op, jqXHR, errorThrown);
                  params.data = outData;
                  self._showFileError(errMsg, outData, 'filebatchuploaderror');
                  self._setProgress(101, self.$progress, self.msgAjaxProgressError.replace('{operation}', op));
              };
              self._ajaxSubmit(fnBefore, fnSuccess, fnComplete, fnError, formdata);
          },
          _deleteFileIndex: function ($frame) {
              var self = this, ind = $frame.attr('data-fileindex'), rev = self.reversePreviewOrder;
              if (ind.substring(0, 5) === $h.INIT_FLAG) {
                  ind = parseInt(ind.replace($h.INIT_FLAG, ''));
                  self.initialPreview = $h.spliceArray(self.initialPreview, ind, rev);
                  self.initialPreviewConfig = $h.spliceArray(self.initialPreviewConfig, ind, rev);
                  self.initialPreviewThumbTags = $h.spliceArray(self.initialPreviewThumbTags, ind, rev);
                  self.getFrames().each(function () {
                      var $nFrame = $(this), nInd = $nFrame.attr('data-fileindex');
                      if (nInd.substring(0, 5) === $h.INIT_FLAG) {
                          nInd = parseInt(nInd.replace($h.INIT_FLAG, ''));
                          if (nInd > ind) {
                              nInd--;
                              $nFrame.attr('data-fileindex', $h.INIT_FLAG + nInd);
                          }
                      }
                  });
              }
          },
          _resetCaption: function () {
              var self = this;
              setTimeout(function () {
                  var cap, n, chk = self.previewCache.count(true), len = self.fileManager.count(), file,
                      incomplete = ':not(.file-preview-success):not(.file-preview-error)',
                      hasThumb = self.showPreview && self.getFrames(incomplete).length;
                  if (len === 0 && chk === 0 && !hasThumb) {
                      self.reset();
                  } else {
                      n = chk + len;
                      if (n > 1) {
                          cap = self._getMsgSelected(n);
                      } else {
                          file = self.fileManager.getFirstFile();
                          cap = file ? file.nameFmt : '_';
                      }
                      self._setCaption(cap);
                  }
              }, self.processDelay);
          },
          _initFileActions: function () {
              var self = this;
              if (!self.showPreview) {
                  return;
              }
              self._initZoomButton();
              self.getFrames(' .kv-file-remove').each(function () {
                  var $el = $(this), $frame = $el.closest($h.FRAMES), hasError, id = $frame.attr('id'),
                      ind = $frame.attr('data-fileindex'), status;
                  self._handler($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);
                      $frame.fadeOut('slow', function () {
                          self.fileManager.remove($frame);
                          self._clearObjects($frame);
                          $frame.remove();
                          if (id && hasError) {
                              self.$errorContainer.find('li[data-thumb-id="' + id + '"]').fadeOut('fast', function () {
                                  $(this).remove();
                                  if (!self._errorsExist()) {
                                      self._resetErrors();
                                  }
                              });
                          }
                          self._clearFileInput();
                          self._resetCaption();
                          self._raise('fileremoved', [id, ind]);
                      });
                  });
              });
              self.getFrames(' .kv-file-upload').each(function () {
                  var $el = $(this);
                  self._handler($el, 'click', function () {
                      var $frame = $el.closest($h.FRAMES), fileId = self._getThumbFileId($frame);
                      self._hideProgress();
                      if ($frame.hasClass('file-preview-error') && !self.retryErrorUploads) {
                          return;
                      }
                      self._uploadSingle(self.fileManager.getIndex(fileId), fileId, false);
                  });
              });
          },
          _initPreviewActions: function () {
              var self = this, $preview = self.$preview, deleteExtraData = self.deleteExtraData || {},
                  btnRemove = $h.FRAMES + ' .kv-file-remove', settings = self.fileActionSettings,
                  origClass = settings.removeClass, errClass = settings.removeErrorClass,
                  resetProgress = function () {
                      var hasFiles = self.isAjaxUpload ? self.previewCache.count(true) : self._inputFileCount();
                      if (!self.getFrames().length && !hasFiles) {
                          self._setCaption('');
                          self.reset();
                          self.initialCaption = '';
                      }
                  };
              self._initZoomButton();
              $preview.find(btnRemove).each(function () {
                  var $el = $(this), vUrl = $el.data('url') || self.deleteUrl, vKey = $el.data('key'), errMsg, fnBefore,
                      fnSuccess, fnError, op = self.ajaxOperations.deleteThumb;
                  if ($h.isEmpty(vUrl) || vKey === undefined) {
                      return;
                  }
                  if (typeof vUrl === 'function') {
                      vUrl = vUrl();
                  }
                  var $frame = $el.closest($h.FRAMES), cache = self.previewCache.data, settings, params, config,
                      fileName, extraData, index = $frame.attr('data-fileindex');
                  index = parseInt(index.replace($h.INIT_FLAG, ''));
                  config = $h.isEmpty(cache.config) && $h.isEmpty(cache.config[index]) ? null : cache.config[index];
                  extraData = $h.isEmpty(config) || $h.isEmpty(config.extra) ? deleteExtraData : config.extra;
                  fileName = config && (config.filename || config.caption) || '';
                  if (typeof extraData === 'function') {
                      extraData = extraData();
                  }
                  params = {id: $el.attr('id'), key: vKey, extra: extraData};
                  fnBefore = function (jqXHR) {
                      self.ajaxAborted = false;
                      self._raise('filepredelete', [vKey, jqXHR, extraData]);
                      if (self._abort()) {
                          jqXHR.abort();
                      } else {
                          $el.removeClass(errClass);
                          $h.addCss($frame, 'file-uploading');
                          $h.addCss($el, 'disabled ' + origClass);
                      }
                  };
                  fnSuccess = function (data, textStatus, jqXHR) {
                      var n, cap;
                      if (!$h.isEmpty(data) && !$h.isEmpty(data.error)) {
                          params.jqXHR = jqXHR;
                          params.response = data;
                          errMsg = self._parseError(op, jqXHR, self.msgDeleteError, fileName);
                          self._showFileError(errMsg, params, 'filedeleteerror');
                          $frame.removeClass('file-uploading');
                          $el.removeClass('disabled ' + origClass).addClass(errClass);
                          resetProgress();
                          return;
                      }
                      $frame.removeClass('file-uploading').addClass('file-deleted');
                      $frame.fadeOut('slow', function () {
                          index = parseInt(($frame.attr('data-fileindex')).replace($h.INIT_FLAG, ''));
                          self.previewCache.unset(index);
                          self._deleteFileIndex($frame);
                          n = self.previewCache.count(true);
                          cap = n > 0 ? self._getMsgSelected(n) : '';
                          self._setCaption(cap);
                          self._raise('filedeleted', [vKey, jqXHR, extraData]);
                          self._clearObjects($frame);
                          $frame.remove();
                          resetProgress();
                      });
                  };
                  fnError = function (jqXHR, textStatus, errorThrown) {
                      var errMsg = self._parseError(op, jqXHR, errorThrown, fileName);
                      params.jqXHR = jqXHR;
                      params.response = {};
                      self._showFileError(errMsg, params, 'filedeleteerror');
                      $frame.removeClass('file-uploading');
                      $el.removeClass('disabled ' + origClass).addClass(errClass);
                      resetProgress();
                  };
                  self._initAjaxSettings();
                  self._mergeAjaxCallback('beforeSend', fnBefore, 'delete');
                  self._mergeAjaxCallback('success', fnSuccess, 'delete');
                  self._mergeAjaxCallback('error', fnError, 'delete');
                  settings = $.extend(true, {}, {
                      url: self._encodeURI(vUrl),
                      type: 'POST',
                      dataType: 'json',
                      data: $.extend(true, {}, {key: vKey}, extraData)
                  }, self._ajaxDeleteSettings);
                  self._handler($el, 'click', function () {
                      if (!self._validateMinCount()) {
                          return false;
                      }
                      self.ajaxAborted = false;
                      self._raise('filebeforedelete', [vKey, extraData]);
                      if (self.ajaxAborted instanceof Promise) {
                          self.ajaxAborted.then(function (result) {
                              if (!result) {
                                  $.ajax(settings);
                              }
                          });
                      } else {
                          if (!self.ajaxAborted) {
                              $.ajax(settings);
                          }
                      }
                  });
              });
          },
          _hideFileIcon: function () {
              var self = this;
              if (self.overwriteInitial) {
                  self.$captionContainer.removeClass('icon-visible');
              }
          },
          _showFileIcon: function () {
              var self = this;
              $h.addCss(self.$captionContainer, 'icon-visible');
          },
          _getSize: function (bytes, sizes) {
              var self = this, size = parseFloat(bytes), i, func = self.fileSizeGetter, out;
              if (!$.isNumeric(bytes) || !$.isNumeric(size)) {
                  return '';
              }
              if (typeof func === 'function') {
                  out = func(size);
              } else {
                  if (size === 0) {
                      out = '0.00 B';
                  } else {
                      if (!sizes) {
                          sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                      }
                      i = Math.floor(Math.log(size) / Math.log(1024));
                      out = (size / Math.pow(1024, i)).toFixed(2) + ' ' + sizes[i];
                  }
              }
              return self._getLayoutTemplate('size').replace('{sizeText}', out);
          },
          _getFileType: function (ftype) {
              var self = this;
              return self.mimeTypeAliases[ftype] || ftype;
          },
          _generatePreviewTemplate: function (
              cat,
              data,
              fname,
              ftype,
              previewId,
              fileId,
              isError,
              size,
              frameClass,
              foot,
              ind,
              templ,
              attrs,
              zoomData
          ) {
              var self = this, caption = self.slug(fname), prevContent, zoomContent = '', styleAttribs = '',
                  screenW = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                  config, title = caption, alt = caption, typeCss = 'type-default', getContent,
                  footer = foot || self._renderFileFooter(cat, caption, size, 'auto', isError),
                  forcePrevIcon = self.preferIconicPreview, forceZoomIcon = self.preferIconicZoomPreview,
                  newCat = forcePrevIcon ? 'other' : cat;
              config = screenW < 400 ? (self.previewSettingsSmall[newCat] || self.defaults.previewSettingsSmall[newCat]) :
                  (self.previewSettings[newCat] || self.defaults.previewSettings[newCat]);
              if (config) {
                  $.each(config, function (key, val) {
                      styleAttribs += key + ':' + val + ';';
                  });
              }
              getContent = function (c, d, zoom, frameCss) {
                  var id = zoom ? 'zoom-' + previewId : previewId, tmplt = self._getPreviewTemplate(c),
                      css = (frameClass || '') + ' ' + frameCss;
                  if (self.frameClass) {
                      css = self.frameClass + ' ' + css;
                  }
                  if (zoom) {
                      css = css.replace(' ' + $h.SORT_CSS, '');
                  }
                  tmplt = self._parseFilePreviewIcon(tmplt, fname);
                  if (cat === 'object' && !ftype) {
                      $.each(self.defaults.fileTypeSettings, function (key, func) {
                          if (key === 'object' || key === 'other') {
                              return;
                          }
                          if (func(fname, ftype)) {
                              typeCss = 'type-' + key;
                          }
                      });
                  }
                  if (!$h.isEmpty(attrs)) {
                      if (attrs.title !== undefined && attrs.title !== null) {
                          title = attrs.title;
                      }
                      if (attrs.alt !== undefined && attrs.alt !== null) {
                          title = attrs.alt;
                      }
                  }
                  return tmplt.setTokens({
                      'previewId': id,
                      'caption': caption,
                      'title': title,
                      'alt': alt,
                      'frameClass': css,
                      'type': self._getFileType(ftype),
                      'fileindex': ind,
                      'fileid': fileId || '',
                      'typeCss': typeCss,
                      'footer': footer,
                      'data': d,
                      'template': templ || cat,
                      'style': styleAttribs ? 'style="' + styleAttribs + '"' : ''
                  });
              };
              ind = ind || previewId.slice(previewId.lastIndexOf('-') + 1);
              if (self.fileActionSettings.showZoom) {
                  zoomContent = getContent((forceZoomIcon ? 'other' : cat), zoomData ? zoomData : data, true,
                      'kv-zoom-thumb');
              }
              zoomContent = '\n' + self._getLayoutTemplate('zoomCache').replace('{zoomContent}', zoomContent);
              if (typeof self.sanitizeZoomCache === 'function') {
                  zoomContent = self.sanitizeZoomCache(zoomContent);
              }
              prevContent = getContent((forcePrevIcon ? 'other' : cat), data, false, 'kv-preview-thumb');
              return prevContent.setTokens({zoomCache: zoomContent});
          },
          _addToPreview: function ($preview, content) {
              var self = this, $el;
              content = $h.cspBuffer.stash(content);
              $el = self.reversePreviewOrder ? $preview.prepend(content) : $preview.append(content);
              $h.cspBuffer.apply($preview);
              return $el;
          },
          _previewDefault: function (file, isDisabled) {
              var self = this, $preview = self.$preview;
              if (!self.showPreview) {
                  return;
              }
              var fname = $h.getFileName(file), ftype = file ? file.type : '', content, size = file.size || 0,
                  caption = self._getFileName(file, ''), isError = isDisabled === true && !self.isAjaxUpload,
                  data = $h.createObjectURL(file), fileId = self.fileManager.getId(file),
                  previewId = self._getThumbId(fileId);
              self._clearDefaultPreview();
              content = self._generatePreviewTemplate('other', data, fname, ftype, previewId, fileId, isError, size);
              self._addToPreview($preview, content);
              self._setThumbAttr(previewId, caption, size);
              if (isDisabled === true && self.isAjaxUpload) {
                  self._setThumbStatus(self._getFrame(previewId), 'Error');
              }
          },
          _previewFile: function (i, file, theFile, data, fileInfo) {
              if (!this.showPreview) {
                  return;
              }
              var self = this, fname = $h.getFileName(file), ftype = fileInfo.type, caption = fileInfo.name,
                  cat = self._parseFileType(ftype, fname), content, $preview = self.$preview, fsize = file.size || 0,
                  iData = cat === 'image' ? theFile.target.result : data,
                  fileId = self.fileManager.getId(file), previewId = self._getThumbId(fileId);
              /** @namespace window.DOMPurify */
              content = self._generatePreviewTemplate(cat, iData, fname, ftype, previewId, fileId, false, fsize);
              self._clearDefaultPreview();
              self._addToPreview($preview, content);
              var $thumb = self._getFrame(previewId);
              self._validateImageOrientation($thumb.find('img'), file, previewId, fileId, caption, ftype, fsize, iData);
              self._setThumbAttr(previewId, caption, fsize);
              self._initSortable();
          },
          _setThumbAttr: function (id, caption, size) {
              var self = this, $frame = self._getFrame(id);
              if ($frame.length) {
                  size = size && size > 0 ? self._getSize(size) : '';
                  $frame.data({'caption': caption, 'size': size});
              }
          },
          _setInitThumbAttr: function () {
              var self = this, data = self.previewCache.data, len = self.previewCache.count(true), config,
                  caption, size, previewId;
              if (len === 0) {
                  return;
              }
              for (var i = 0; i < len; i++) {
                  config = data.config[i];
                  previewId = self.previewInitId + '-' + $h.INIT_FLAG + i;
                  caption = $h.ifSet('caption', config, $h.ifSet('filename', config));
                  size = $h.ifSet('size', config);
                  self._setThumbAttr(previewId, caption, size);
              }
          },
          _slugDefault: function (text) {
              // noinspection RegExpRedundantEscape
              return $h.isEmpty(text, true) ? '' : String(text).replace(/[\[\]\/\{}:;#%=\(\)\*\+\?\\\^\$\|<>&"']/g, '_');
          },
          _updateFileDetails: function (numFiles, skipRaiseEvent) {
              var self = this, $el = self.$element, label, n, log, nFiles, file,
                  name = ($h.isIE(9) && $h.findFileName($el.val())) || ($el[0].files[0] && $el[0].files[0].name);
              if (!name && self.fileManager.count() > 0) {
                  file = self.fileManager.getFirstFile();
                  label = file.nameFmt;
              } else {
                  label = name ? self.slug(name) : '_';
              }
              n = self.isAjaxUpload ? self.fileManager.count() : numFiles;
              nFiles = self.previewCache.count(true) + n;
              log = n === 1 ? label : self._getMsgSelected(nFiles);
              if (self.isError) {
                  self.$previewContainer.removeClass('file-thumb-loading');
                  self.$previewStatus.html('');
                  self.$captionContainer.removeClass('icon-visible');
              } else {
                  self._showFileIcon();
              }
              self._setCaption(log, self.isError);
              self.$container.removeClass('file-input-new file-input-ajax-new');
              if (!skipRaiseEvent) {
                  self._raise('fileselect', [numFiles, label]);
              }
              if (self.previewCache.count(true)) {
                  self._initPreviewActions();
              }
          },
          _setThumbStatus: function ($thumb, status) {
              var self = this;
              if (!self.showPreview) {
                  return;
              }
              var icon = 'indicator' + status, msg = icon + 'Title',
                  css = 'file-preview-' + status.toLowerCase(),
                  $indicator = $thumb.find('.file-upload-indicator'),
                  config = self.fileActionSettings;
              $thumb.removeClass('file-preview-success file-preview-error file-preview-paused file-preview-loading');
              if (status === 'Success') {
                  $thumb.find('.file-drag-handle').remove();
              }
              $h.setHtml($indicator, config[icon]);
              $indicator.attr('title', config[msg]);
              $thumb.addClass(css);
              if (status === 'Error' && !self.retryErrorUploads) {
                  $thumb.find('.kv-file-upload').attr('disabled', true);
              }
          },
          _setProgressCancelled: function () {
              var self = this;
              self._setProgress(101, self.$progress, self.msgCancelled);
          },
          _setProgress: function (p, $el, error, stats) {
              var self = this;
              $el = $el || self.$progress;
              if (!$el.length) {
                  return;
              }
              var pct = Math.min(p, 100), out, pctLimit = self.progressUploadThreshold,
                  t = p <= 100 ? self.progressTemplate : self.progressCompleteTemplate,
                  template = pct < 100 ? self.progressTemplate :
                      (error ? (self.paused ? self.progressPauseTemplate : self.progressErrorTemplate) : t);
              if (p >= 100) {
                  stats = '';
              }
              if (!$h.isEmpty(template)) {
                  if (pctLimit && pct > pctLimit && p <= 100) {
                      out = template.setTokens({'percent': pctLimit, 'status': self.msgUploadThreshold});
                  } else {
                      out = template.setTokens({'percent': pct, 'status': (p > 100 ? self.msgUploadEnd : pct + '%')});
                  }
                  stats = stats || '';
                  out = out.setTokens({stats: stats});
                  $h.setHtml($el, out);
                  if (error) {
                      $h.setHtml($el.find('[role="progressbar"]'), error);
                  }
              }
          },
          _hasFiles: function () {
              var el = this.$element[0];
              return !!(el && el.files && el.files.length);
          },
          _setFileDropZoneTitle: function () {
              var self = this, $zone = self.$container.find('.file-drop-zone'), title = self.dropZoneTitle, strFiles;
              if (self.isClickable) {
                  strFiles = $h.isEmpty(self.$element.attr('multiple')) ? self.fileSingle : self.filePlural;
                  title += self.dropZoneClickTitle.replace('{files}', strFiles);
              }
              $zone.find('.' + self.dropZoneTitleClass).remove();
              if (!self.showPreview || $zone.length === 0 || self.fileManager.count() > 0 || !self.dropZoneEnabled ||
                  self.previewCache.count() > 0 || (!self.isAjaxUpload && self._hasFiles())) {
                  return;
              }
              if ($zone.find($h.FRAMES).length === 0 && $h.isEmpty(self.defaultPreviewContent)) {
                  $zone.prepend('<div class="' + self.dropZoneTitleClass + '">' + title + '</div>');
              }
              self.$container.removeClass('file-input-new');
              $h.addCss(self.$container, 'file-input-ajax-new');
          },
          _getStats: function (stats) {
              var self = this, pendingTime, t;
              if (!self.showUploadStats || !stats || !stats.bitrate) {
                  return '';
              }
              t = self._getLayoutTemplate('stats');
              pendingTime = (!stats.elapsed || !stats.bps) ? self.msgCalculatingTime :
                  self.msgPendingTime.setTokens({time: $h.getElapsed(Math.ceil(stats.pendingBytes / stats.bps))});
  
              return t.setTokens({
                  uploadSpeed: stats.bitrate,
                  pendingTime: pendingTime
              });
          },
          _setResumableProgress: function (pct, stats, $thumb) {
              var self = this, rm = self.resumableManager, obj = $thumb ? rm : self,
                  $prog = $thumb ? $thumb.find('.file-thumb-progress') : null;
              if (obj.lastProgress === 0) {
                  obj.lastProgress = pct;
              }
              if (pct < obj.lastProgress) {
                  pct = obj.lastProgress;
              }
              self._setProgress(pct, $prog, null, self._getStats(stats));
              obj.lastProgress = pct;
          },
          _toggleResumableProgress: function (template, message) {
              var self = this, $progress = self.$progress;
              if ($progress && $progress.length) {
                  $h.setHtml($progress, template.setTokens({
                      percent: 101,
                      status: message,
                      stats: ''
                  }));
              }
          },
          _setFileUploadStats: function (id, pct, stats) {
              var self = this, $prog = self.$progress;
              if (!self.showPreview && (!$prog || !$prog.length)) {
                  return;
              }
              var fm = self.fileManager, rm = self.resumableManager, $thumb = fm.getThumb(id), pctTot,
                  totUpSize = 0, totSize = fm.getTotalSize(), totStats = $.extend(true, {}, stats);
              if (self.enableResumableUpload) {
                  var loaded = stats.loaded, currUplSize = rm.getUploadedSize(), currTotSize = rm.file.size, totLoaded;
                  loaded += currUplSize;
                  totLoaded = fm.uploadedSize + loaded;
                  pct = $h.round(100 * loaded / currTotSize);
                  stats.pendingBytes = currTotSize - currUplSize;
                  self._setResumableProgress(pct, stats, $thumb);
                  pctTot = Math.floor(100 * totLoaded / totSize);
                  totStats.pendingBytes = totSize - totLoaded;
                  self._setResumableProgress(pctTot, totStats);
              } else {
                  fm.setProgress(id, pct);
                  $prog = $thumb && $thumb.length ? $thumb.find('.file-thumb-progress') : null;
                  self._setProgress(pct, $prog, null, self._getStats(stats));
                  $.each(fm.stats, function (id, cfg) {
                      totUpSize += cfg.loaded;
                  });
                  totStats.pendingBytes = totSize - totUpSize;
                  pctTot = $h.round(totUpSize / totSize * 100);
                  self._setProgress(pctTot, null, null, self._getStats(totStats));
              }
          },
          _validateMinCount: function () {
              var self = this, len = self.isAjaxUpload ? self.fileManager.count() : self._inputFileCount();
              if (self.validateInitialCount && self.minFileCount > 0 && self._getFileCount(len - 1) < self.minFileCount) {
                  self._noFilesError({});
                  return false;
              }
              return true;
          },
          _getFileCount: function (fileCount, includeInitial) {
              var self = this, addCount = 0;
              if (includeInitial === undefined) {
                  includeInitial = self.validateInitialCount && !self.overwriteInitial;
              }
              if (includeInitial) {
                  addCount = self.previewCache.count(true);
                  fileCount += addCount;
              }
              return fileCount;
          },
          _getFileId: function (file) {
              return $h.getFileId(file, this.generateFileId);
          },
          _getFileName: function (file, defaultValue) {
              var self = this, fileName = $h.getFileName(file);
              return fileName ? self.slug(fileName) : defaultValue;
          },
          _getFileNames: function (skipNull) {
              var self = this;
              return self.filenames.filter(function (n) {
                  return (skipNull ? n !== undefined : n !== undefined && n !== null);
              });
          },
          _setPreviewError: function ($thumb, keepFile) {
              var self = this, removeFrame = self.removeFromPreviewOnError && !self.retryErrorUploads;
              if (!keepFile || removeFrame) {
                  self.fileManager.remove($thumb);
              }
              if (!self.showPreview) {
                  return;
              }
              if (removeFrame) {
                  $thumb.remove();
                  return;
              } else {
                  self._setThumbStatus($thumb, 'Error');
              }
              self._refreshUploadButton($thumb);
          },
          _refreshUploadButton: function ($thumb) {
              var self = this, $btn = $thumb.find('.kv-file-upload'), cfg = self.fileActionSettings,
                  icon = cfg.uploadIcon, title = cfg.uploadTitle;
              if (!$btn.length) {
                  return;
              }
              if (self.retryErrorUploads) {
                  icon = cfg.uploadRetryIcon;
                  title = cfg.uploadRetryTitle;
              }
              $btn.attr('title', title);
              $h.setHtml($btn, icon);
          },
          _checkDimensions: function (i, chk, $img, $thumb, fname, type, params) {
              var self = this, msg, dim, tag = chk === 'Small' ? 'min' : 'max', limit = self[tag + 'Image' + type],
                  $imgEl, isValid;
              if ($h.isEmpty(limit) || !$img.length) {
                  return;
              }
              $imgEl = $img[0];
              dim = (type === 'Width') ? $imgEl.naturalWidth || $imgEl.width : $imgEl.naturalHeight || $imgEl.height;
              isValid = chk === 'Small' ? dim >= limit : dim <= limit;
              if (isValid) {
                  return;
              }
              msg = self['msgImage' + type + chk].setTokens({'name': fname, 'size': limit});
              self._showFileError(msg, params);
              self._setPreviewError($thumb);
          },
          _getExifObj: function (data) {
              var self = this, exifObj, error = $h.logMessages.exifWarning;
              if (data.slice(0, 23) !== 'data:image/jpeg;base64,' && data.slice(0, 22) !== 'data:image/jpg;base64,') {
                  exifObj = null;
                  return;
              }
              try {
                  exifObj = window.piexif ? window.piexif.load(data) : null;
              } catch (err) {
                  exifObj = null;
                  error = err && err.message || '';
              }
              if (!exifObj) {
                  self._log($h.logMessages.badExifParser, {details: error});
              }
              return exifObj;
          },
          setImageOrientation: function ($img, $zoomImg, value, $thumb) {
              var self = this, invalidImg = !$img || !$img.length, invalidZoomImg = !$zoomImg || !$zoomImg.length, $mark,
                  isHidden = false, $div, zoomOnly = invalidImg && $thumb && $thumb.attr('data-template') === 'image', ev;
              if (invalidImg && invalidZoomImg) {
                  return;
              }
              ev = 'load.fileinputimageorient';
              if (zoomOnly) {
                  $img = $zoomImg;
                  $zoomImg = null;
                  $img.css(self.previewSettings.image);
                  $div = $(document.createElement('div')).appendTo($thumb.find('.kv-file-content'));
                  $mark = $(document.createElement('span')).insertBefore($img);
                  $img.css('visibility', 'hidden').removeClass('file-zoom-detail').appendTo($div);
              } else {
                  isHidden = !$img.is(':visible');
              }
              $img.off(ev).on(ev, function () {
                  if (isHidden) {
                      self.$preview.removeClass('hide-content');
                      $thumb.find('.kv-file-content').css('visibility', 'hidden');
                  }
                  var img = $img[0], zoomImg = $zoomImg && $zoomImg.length ? $zoomImg[0] : null,
                      h = img.offsetHeight, w = img.offsetWidth, r = $h.getRotation(value);
                  if (isHidden) {
                      $thumb.find('.kv-file-content').css('visibility', 'visible');
                      self.$preview.addClass('hide-content');
                  }
                  $img.data('orientation', value);
                  if (zoomImg) {
                      $zoomImg.data('orientation', value);
                  }
                  if (value < 5) {
                      $h.setTransform(img, r);
                      $h.setTransform(zoomImg, r);
                      return;
                  }
                  var offsetAngle = Math.atan(w / h), origFactor = Math.sqrt(Math.pow(h, 2) + Math.pow(w, 2)),
                      scale = !origFactor ? 1 : (h / Math.cos(Math.PI / 2 + offsetAngle)) / origFactor,
                      s = ' scale(' + Math.abs(scale) + ')';
                  $h.setTransform(img, r + s);
                  $h.setTransform(zoomImg, r + s);
                  if (zoomOnly) {
                      $img.css('visibility', 'visible').insertAfter($mark).addClass('file-zoom-detail');
                      $mark.remove();
                      $div.remove();
                  }
              });
          },
          _validateImageOrientation: function ($img, file, previewId, fileId, caption, ftype, fsize, iData) {
              var self = this, exifObj = null, value, autoOrientImage = self.autoOrientImage, selector;
              if (self.canOrientImage) {
                  $img.css('image-orientation', (autoOrientImage ? 'from-image' : 'none'));
                  self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
                  return;
              }
              selector = $h.getZoomSelector(previewId, ' img');
              exifObj = autoOrientImage ? self._getExifObj(iData) : null;
              value = exifObj ? exifObj['0th'][piexif.ImageIFD.Orientation] : null; // jshint ignore:line
              if (!value) {
                  self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
                  return;
              }
              self.setImageOrientation($img, $(selector), value, self._getFrame(previewId));
              self._raise('fileimageoriented', {'$img': $img, 'file': file});
              self._validateImage(previewId, fileId, caption, ftype, fsize, iData, exifObj);
          },
          _validateImage: function (previewId, fileId, fname, ftype, fsize, iData, exifObj) {
              var self = this, $preview = self.$preview, params, w1, w2, $thumb = self._getFrame(previewId),
                  i = $thumb.attr('data-fileindex'), $img = $thumb.find('img');
              fname = fname || 'Untitled';
              $img.one('load', function () {
                  w1 = $thumb.width();
                  w2 = $preview.width();
                  if (w1 > w2) {
                      $img.css('width', '100%');
                  }
                  params = {ind: i, id: previewId, fileId: fileId};
                  self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Width', params);
                  self._checkDimensions(i, 'Small', $img, $thumb, fname, 'Height', params);
                  if (!self.resizeImage) {
                      self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Width', params);
                      self._checkDimensions(i, 'Large', $img, $thumb, fname, 'Height', params);
                  }
                  self._raise('fileimageloaded', [previewId]);
                  self.fileManager.addImage(fileId, {
                      ind: i,
                      img: $img,
                      thumb: $thumb,
                      pid: previewId,
                      typ: ftype,
                      siz: fsize,
                      validated: false,
                      imgData: iData,
                      exifObj: exifObj
                  });
                  $thumb.data('exif', exifObj);
                  self._validateAllImages();
              }).one('error', function () {
                  self._raise('fileimageloaderror', [previewId]);
              }).each(function () {
                  if (this.complete) {
                      $(this).trigger('load');
                  } else {
                      if (this.error) {
                          $(this).trigger('error');
                      }
                  }
              });
          },
          _validateAllImages: function () {
              var self = this, counter = {val: 0}, numImgs = self.fileManager.getImageCount(), fsize,
                  minSize = self.resizeIfSizeMoreThan;
              if (numImgs !== self.fileManager.totalImages) {
                  return;
              }
              self._raise('fileimagesloaded');
              if (!self.resizeImage) {
                  return;
              }
              $.each(self.fileManager.loadedImages, function (id, config) {
                  if (!config.validated) {
                      fsize = config.siz;
                      if (fsize && fsize > minSize * 1000) {
                          self._getResizedImage(id, config, counter, numImgs);
                      }
                      config.validated = true;
                  }
              });
          },
          _getResizedImage: function (id, config, counter, numImgs) {
              var self = this, img = $(config.img)[0], width = img.naturalWidth, height = img.naturalHeight, blob,
                  ratio = 1, maxWidth = self.maxImageWidth || width, maxHeight = self.maxImageHeight || height,
                  isValidImage = !!(width && height), chkWidth, chkHeight, canvas = self.imageCanvas, dataURI,
                  context = self.imageCanvasContext, type = config.typ, pid = config.pid, ind = config.ind,
                  $thumb = config.thumb, throwError, msg, exifObj = config.exifObj, exifStr, file, params, evParams;
              throwError = function (msg, params, ev) {
                  if (self.isAjaxUpload) {
                      self._showFileError(msg, params, ev);
                  } else {
                      self._showError(msg, params, ev);
                  }
                  self._setPreviewError($thumb);
              };
              file = self.fileManager.getFile(id);
              params = {id: pid, 'index': ind, fileId: id};
              evParams = [id, pid, ind];
              if (!file || !isValidImage || (width <= maxWidth && height <= maxHeight)) {
                  if (isValidImage && file) {
                      self._raise('fileimageresized', evParams);
                  }
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized');
                  }
                  if (!isValidImage) {
                      throwError(self.msgImageResizeError, params, 'fileimageresizeerror');
                      return;
                  }
              }
              type = type || self.resizeDefaultImageType;
              chkWidth = width > maxWidth;
              chkHeight = height > maxHeight;
              if (self.resizePreference === 'width') {
                  ratio = chkWidth ? maxWidth / width : (chkHeight ? maxHeight / height : 1);
              } else {
                  ratio = chkHeight ? maxHeight / height : (chkWidth ? maxWidth / width : 1);
              }
              self._resetCanvas();
              width *= ratio;
              height *= ratio;
              canvas.width = width;
              canvas.height = height;
              try {
                  context.drawImage(img, 0, 0, width, height);
                  dataURI = canvas.toDataURL(type, self.resizeQuality);
                  if (exifObj) {
                      exifStr = window.piexif.dump(exifObj);
                      dataURI = window.piexif.insert(exifStr, dataURI);
                  }
                  blob = $h.dataURI2Blob(dataURI);
                  self.fileManager.setFile(id, blob);
                  self._raise('fileimageresized', evParams);
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized', [undefined, undefined]);
                  }
                  if (!(blob instanceof Blob)) {
                      throwError(self.msgImageResizeError, params, 'fileimageresizeerror');
                  }
              } catch (err) {
                  counter.val++;
                  if (counter.val === numImgs) {
                      self._raise('fileimagesresized', [undefined, undefined]);
                  }
                  msg = self.msgImageResizeException.replace('{errors}', err.message);
                  throwError(msg, params, 'fileimageresizeexception');
              }
          },
          _showProgress: function () {
              var self = this;
              if (self.$progress && self.$progress.length) {
                  self.$progress.show();
              }
          },
          _hideProgress: function () {
              var self = this;
              if (self.$progress && self.$progress.length) {
                  self.$progress.hide();
              }
          },
          _initBrowse: function ($container) {
              var self = this, $el = self.$element;
              if (self.showBrowse) {
                  self.$btnFile = $container.find('.btn-file').append($el);
              } else {
                  $el.appendTo($container).attr('tabindex', -1);
                  $h.addCss($el, 'file-no-browse');
              }
          },
          _initClickable: function () {
              var self = this, $zone, $tmpZone;
              if (!self.isClickable) {
                  return;
              }
              $zone = self.$dropZone;
              if (!self.isAjaxUpload) {
                  $tmpZone = self.$preview.find('.file-default-preview');
                  if ($tmpZone.length) {
                      $zone = $tmpZone;
                  }
              }
  
              $h.addCss($zone, 'clickable');
              $zone.attr('tabindex', -1);
              self._handler($zone, 'click', function (e) {
                  var $tar = $(e.target);
                  if (!self.$errorContainer.is(':visible') && (!$tar.parents(
                      '.file-preview-thumbnails').length || $tar.parents(
                      '.file-default-preview').length)) {
                      self.$element.data('zoneClicked', true).trigger('click');
                      $zone.blur();
                  }
              });
          },
          _initCaption: function () {
              var self = this, cap = self.initialCaption || '';
              if (self.overwriteInitial || $h.isEmpty(cap)) {
                  self.$caption.val('');
                  return false;
              }
              self._setCaption(cap);
              return true;
          },
          _setCaption: function (content, isError) {
              var self = this, title, out, icon, n, cap, file;
              if (!self.$caption.length) {
                  return;
              }
              self.$captionContainer.removeClass('icon-visible');
              if (isError) {
                  title = $('<div>' + self.msgValidationError + '</div>').text();
                  n = self.fileManager.count();
                  if (n) {
                      file = self.fileManager.getFirstFile();
                      cap = n === 1 && file ? file.nameFmt : self._getMsgSelected(n);
                  } else {
                      cap = self._getMsgSelected(self.msgNo);
                  }
                  out = $h.isEmpty(content) ? cap : content;
                  icon = '<span class="' + self.msgValidationErrorClass + '">' + self.msgValidationErrorIcon + '</span>';
              } else {
                  if ($h.isEmpty(content)) {
                      return;
                  }
                  title = $('<div>' + content + '</div>').text();
                  out = title;
                  icon = self._getLayoutTemplate('fileIcon');
              }
              self.$captionContainer.addClass('icon-visible');
              self.$caption.attr('title', title).val(out);
              $h.setHtml(self.$captionIcon, icon);
          },
          _createContainer: function () {
              var self = this, attribs = {'class': 'file-input file-input-new' + (self.rtl ? ' kv-rtl' : '')},
                  $container = $h.createElement($h.cspBuffer.stash(self._renderMain()));
              $h.cspBuffer.apply($container);
              $container.insertBefore(self.$element).attr(attribs);
              self._initBrowse($container);
              if (self.theme) {
                  $container.addClass('theme-' + self.theme);
              }
              return $container;
          },
          _refreshContainer: function () {
              var self = this, $container = self.$container, $el = self.$element;
              $el.insertAfter($container);
              $h.setHtml($container, self._renderMain());
              self._initBrowse($container);
              self._validateDisabled();
          },
          _validateDisabled: function () {
              var self = this;
              self.$caption.attr({readonly: self.isDisabled});
          },
          _renderMain: function () {
              var self = this,
                  dropCss = self.dropZoneEnabled ? ' file-drop-zone' : 'file-drop-disabled',
                  close = !self.showClose ? '' : self._getLayoutTemplate('close'),
                  preview = !self.showPreview ? '' : self._getLayoutTemplate('preview')
                      .setTokens({'class': self.previewClass, 'dropClass': dropCss}),
                  css = self.isDisabled ? self.captionClass + ' file-caption-disabled' : self.captionClass,
                  caption = self.captionTemplate.setTokens({'class': css + ' kv-fileinput-caption'});
              return self.mainTemplate.setTokens({
                  'class': self.mainClass + (!self.showBrowse && self.showCaption ? ' no-browse' : ''),
                  'preview': preview,
                  'close': close,
                  'caption': caption,
                  'upload': self._renderButton('upload'),
                  'remove': self._renderButton('remove'),
                  'cancel': self._renderButton('cancel'),
                  'pause': self._renderButton('pause'),
                  'browse': self._renderButton('browse')
              });
  
          },
          _renderButton: function (type) {
              var self = this, tmplt = self._getLayoutTemplate('btnDefault'), css = self[type + 'Class'],
                  title = self[type + 'Title'], icon = self[type + 'Icon'], label = self[type + 'Label'],
                  status = self.isDisabled ? ' disabled' : '', btnType = 'button';
              switch (type) {
                  case 'remove':
                      if (!self.showRemove) {
                          return '';
                      }
                      break;
                  case 'cancel':
                      if (!self.showCancel) {
                          return '';
                      }
                      css += ' kv-hidden';
                      break;
                  case 'pause':
                      if (!self.showPause) {
                          return '';
                      }
                      css += ' kv-hidden';
                      break;
                  case 'upload':
                      if (!self.showUpload) {
                          return '';
                      }
                      if (self.isAjaxUpload && !self.isDisabled) {
                          tmplt = self._getLayoutTemplate('btnLink').replace('{href}', self.uploadUrl);
                      } else {
                          btnType = 'submit';
                      }
                      break;
                  case 'browse':
                      if (!self.showBrowse) {
                          return '';
                      }
                      tmplt = self._getLayoutTemplate('btnBrowse');
                      break;
                  default:
                      return '';
              }
  
              css += type === 'browse' ? ' btn-file' : ' fileinput-' + type + ' fileinput-' + type + '-button';
              if (!$h.isEmpty(label)) {
                  label = ' <span class="' + self.buttonLabelClass + '">' + label + '</span>';
              }
              return tmplt.setTokens({
                  'type': btnType, 'css': css, 'title': title, 'status': status, 'icon': icon, 'label': label
              });
          },
          _renderThumbProgress: function () {
              var self = this;
              return '<div class="file-thumb-progress kv-hidden">' +
                  self.progressInfoTemplate.setTokens({percent: 101, status: self.msgUploadBegin, stats: ''}) +
                  '</div>';
          },
          _renderFileFooter: function (cat, caption, size, width, isError) {
              var self = this, config = self.fileActionSettings, rem = config.showRemove, drg = config.showDrag,
                  upl = config.showUpload, zoom = config.showZoom, out, params,
                  template = self._getLayoutTemplate('footer'), tInd = self._getLayoutTemplate('indicator'),
                  ind = isError ? config.indicatorError : config.indicatorNew,
                  title = isError ? config.indicatorErrorTitle : config.indicatorNewTitle,
                  indicator = tInd.setTokens({'indicator': ind, 'indicatorTitle': title});
              size = self._getSize(size);
              params = {type: cat, caption: caption, size: size, width: width, progress: '', indicator: indicator};
              if (self.isAjaxUpload) {
                  params.progress = self._renderThumbProgress();
                  params.actions = self._renderFileActions(params, upl, false, rem, zoom, drg, false, false, false);
              } else {
                  params.actions = self._renderFileActions(params, false, false, false, zoom, drg, false, false, false);
              }
              out = template.setTokens(params);
              out = $h.replaceTags(out, self.previewThumbTags);
              return out;
          },
          _renderFileActions: function (
              cfg,
              showUpl,
              showDwn,
              showDel,
              showZoom,
              showDrag,
              disabled,
              url,
              key,
              isInit,
              dUrl,
              dFile
          ) {
              var self = this;
              if (!cfg.type && isInit) {
                  cfg.type = 'image';
              }
              if (self.enableResumableUpload) {
                  showUpl = false;
              } else {
                  if (typeof showUpl === 'function') {
                      showUpl = showUpl(cfg);
                  }
              }
              if (typeof showDwn === 'function') {
                  showDwn = showDwn(cfg);
              }
              if (typeof showDel === 'function') {
                  showDel = showDel(cfg);
              }
              if (typeof showZoom === 'function') {
                  showZoom = showZoom(cfg);
              }
              if (typeof showDrag === 'function') {
                  showDrag = showDrag(cfg);
              }
              if (!showUpl && !showDwn && !showDel && !showZoom && !showDrag) {
                  return '';
              }
              var vUrl = url === false ? '' : ' data-url="' + url + '"', btnZoom = '', btnDrag = '', css,
                  vKey = key === false ? '' : ' data-key="' + key + '"', btnDelete = '', btnUpload = '', btnDownload = '',
                  template = self._getLayoutTemplate('actions'), config = self.fileActionSettings,
                  otherButtons = self.otherActionButtons.setTokens({'dataKey': vKey, 'key': key}),
                  removeClass = disabled ? config.removeClass + ' disabled' : config.removeClass;
              if (showDel) {
                  btnDelete = self._getLayoutTemplate('actionDelete').setTokens({
                      'removeClass': removeClass,
                      'removeIcon': config.removeIcon,
                      'removeTitle': config.removeTitle,
                      'dataUrl': vUrl,
                      'dataKey': vKey,
                      'key': key
                  });
              }
              if (showUpl) {
                  btnUpload = self._getLayoutTemplate('actionUpload').setTokens({
                      'uploadClass': config.uploadClass,
                      'uploadIcon': config.uploadIcon,
                      'uploadTitle': config.uploadTitle
                  });
              }
              if (showDwn) {
                  btnDownload = self._getLayoutTemplate('actionDownload').setTokens({
                      'downloadClass': config.downloadClass,
                      'downloadIcon': config.downloadIcon,
                      'downloadTitle': config.downloadTitle,
                      'downloadUrl': dUrl || self.initialPreviewDownloadUrl
                  });
                  btnDownload = btnDownload.setTokens({'filename': dFile, 'key': key});
              }
              if (showZoom) {
                  btnZoom = self._getLayoutTemplate('actionZoom').setTokens({
                      'zoomClass': config.zoomClass,
                      'zoomIcon': config.zoomIcon,
                      'zoomTitle': config.zoomTitle
                  });
              }
              if (showDrag && isInit) {
                  css = 'drag-handle-init ' + config.dragClass;
                  btnDrag = self._getLayoutTemplate('actionDrag').setTokens({
                      'dragClass': css,
                      'dragTitle': config.dragTitle,
                      'dragIcon': config.dragIcon
                  });
              }
              return template.setTokens({
                  'delete': btnDelete,
                  'upload': btnUpload,
                  'download': btnDownload,
                  'zoom': btnZoom,
                  'drag': btnDrag,
                  'other': otherButtons
              });
          },
          _browse: function (e) {
              var self = this;
              if (e && e.isDefaultPrevented() || !self._raise('filebrowse')) {
                  return;
              }
              if (self.isError && !self.isAjaxUpload) {
                  self.clear();
              }
              if (self.focusCaptionOnBrowse) {
                  self.$captionContainer.focus();
              }
          },
          _change: function (e) {
              var self = this;
              if (self.changeTriggered) {
                  return;
              }
              var $el = self.$element, isDragDrop = arguments.length > 1, isAjaxUpload = self.isAjaxUpload,
                  tfiles, files = isDragDrop ? arguments[1] : $el[0].files, ctr = self.fileManager.count(),
                  total, initCount, len, isSingleUpl = $h.isEmpty($el.attr('multiple')),
                  maxCount = !isAjaxUpload && isSingleUpl ? 1 : self.maxFileCount, maxTotCount = self.maxTotalFileCount,
                  inclAll = maxTotCount > 0 && maxTotCount > maxCount, flagSingle = (isSingleUpl && ctr > 0),
                  throwError = function (mesg, file, previewId, index) {
                      var p1 = $.extend(true, {}, self._getOutData(null, {}, {}, files), {id: previewId, index: index}),
                          p2 = {id: previewId, index: index, file: file, files: files};
                      self.isPersistentError = true;
                      return isAjaxUpload ? self._showFileError(mesg, p1) : self._showError(mesg, p2);
                  },
                  maxCountCheck = function (n, m, all) {
                      var msg = all ? self.msgTotalFilesTooMany : self.msgFilesTooMany;
                      msg = msg.replace('{m}', m).replace('{n}', n);
                      self.isError = throwError(msg, null, null, null);
                      self.$captionContainer.removeClass('icon-visible');
                      self._setCaption('', true);
                      self.$container.removeClass('file-input-new file-input-ajax-new');
                  };
              self.reader = null;
              self._resetUpload();
              self._hideFileIcon();
              if (self.dropZoneEnabled) {
                  self.$container.find('.file-drop-zone .' + self.dropZoneTitleClass).remove();
              }
              if (!isAjaxUpload) {
                  if (e.target && e.target.files === undefined) {
                      files = e.target.value ? [{name: e.target.value.replace(/^.+\\/, '')}] : [];
                  } else {
                      files = e.target.files || {};
                  }
              }
              tfiles = files;
              if ($h.isEmpty(tfiles) || tfiles.length === 0) {
                  if (!isAjaxUpload) {
                      self.clear();
                  }
                  self._raise('fileselectnone');
                  return;
              }
              self._resetErrors();
              len = tfiles.length;
              initCount = isAjaxUpload ? (self.fileManager.count() + len) : len;
              total = self._getFileCount(initCount, inclAll ? false : undefined);
              if (maxCount > 0 && total > maxCount) {
                  if (!self.autoReplace || len > maxCount) {
                      maxCountCheck((self.autoReplace && len > maxCount ? len : total), maxCount);
                      return;
                  }
                  if (total > maxCount) {
                      self._resetPreviewThumbs(isAjaxUpload);
                  }
              } else {
                  if (inclAll) {
                      total = self._getFileCount(initCount, true);
                      if (maxTotCount > 0 && total > maxTotCount) {
                          if (!self.autoReplace || len > maxCount) {
                              maxCountCheck((self.autoReplace && len > maxTotCount ? len : total), maxTotCount, true);
                              return;
                          }
                          if (total > maxCount) {
                              self._resetPreviewThumbs(isAjaxUpload);
                          }
                      }
                  }
                  if (!isAjaxUpload || flagSingle) {
                      self._resetPreviewThumbs(false);
                      if (flagSingle) {
                          self.clearFileStack();
                      }
                  } else {
                      if (isAjaxUpload && ctr === 0 && (!self.previewCache.count(true) || self.overwriteInitial)) {
                          self._resetPreviewThumbs(true);
                      }
                  }
              }
              self.readFiles(tfiles);
          },
          _abort: function (params) {
              var self = this, data;
              if (self.ajaxAborted && typeof self.ajaxAborted === 'object' && self.ajaxAborted.message !== undefined) {
                  data = $.extend(true, {}, self._getOutData(null), params);
                  data.abortData = self.ajaxAborted.data || {};
                  data.abortMessage = self.ajaxAborted.message;
                  self._setProgress(101, self.$progress, self.msgCancelled);
                  self._showFileError(self.ajaxAborted.message, data, 'filecustomerror');
                  self.cancel();
                  return true;
              }
              return !!self.ajaxAborted;
          },
          _resetFileStack: function () {
              var self = this, i = 0;
              self._getThumbs().each(function () {
                  var $thumb = $(this), ind = $thumb.attr('data-fileindex'), pid = $thumb.attr('id');
                  if (ind === '-1' || ind === -1) {
                      return;
                  }
                  if (!self._getThumbFile($thumb)) {
                      $thumb.attr({'data-fileindex': i});
                      i++;
                  } else {
                      $thumb.attr({'data-fileindex': '-1'});
                  }
                  self._getZoom(pid).attr({
                      'data-fileindex': $thumb.attr('data-fileindex')
                  });
              });
          },
          _isFileSelectionValid: function (cnt) {
              var self = this;
              cnt = cnt || 0;
              if (self.required && !self.getFilesCount()) {
                  self.$errorContainer.html('');
                  self._showFileError(self.msgFileRequired);
                  return false;
              }
              if (self.minFileCount > 0 && self._getFileCount(cnt) < self.minFileCount) {
                  self._noFilesError({});
                  return false;
              }
              return true;
          },
          _canPreview: function (file) {
              var self = this;
              if (!file || !self.showPreview || !self.$preview || !self.$preview.length) {
                  return false;
              }
              var name = file.name || '', type = file.type || '', size = (file.size || 0) / 1000,
                  cat = self._parseFileType(type, name), allowedTypes, allowedMimes, allowedExts, skipPreview,
                  types = self.allowedPreviewTypes, mimes = self.allowedPreviewMimeTypes,
                  exts = self.allowedPreviewExtensions || [], dTypes = self.disabledPreviewTypes,
                  dMimes = self.disabledPreviewMimeTypes, dExts = self.disabledPreviewExtensions || [],
                  maxSize = self.maxFilePreviewSize && parseFloat(self.maxFilePreviewSize) || 0,
                  expAllExt = new RegExp('\\.(' + exts.join('|') + ')$', 'i'),
                  expDisExt = new RegExp('\\.(' + dExts.join('|') + ')$', 'i');
              allowedTypes = !types || types.indexOf(cat) !== -1;
              allowedMimes = !mimes || mimes.indexOf(type) !== -1;
              allowedExts = !exts.length || $h.compare(name, expAllExt);
              skipPreview = (dTypes && dTypes.indexOf(cat) !== -1) || (dMimes && dMimes.indexOf(type) !== -1) ||
                  (dExts.length && $h.compare(name, expDisExt)) || (maxSize && !isNaN(maxSize) && size > maxSize);
              return !skipPreview && (allowedTypes || allowedMimes || allowedExts);
          },
          addToStack: function (file, id) {
              this.fileManager.add(file, id);
          },
          clearFileStack: function () {
              var self = this;
              self.fileManager.clear();
              self._initResumableUpload();
              if (self.enableResumableUpload) {
                  if (self.showPause === null) {
                      self.showPause = true;
                  }
                  if (self.showCancel === null) {
                      self.showCancel = false;
                  }
              } else {
                  self.showPause = false;
                  if (self.showCancel === null) {
                      self.showCancel = true;
                  }
              }
              return self.$element;
          },
          getFileStack: function () {
              return this.fileManager.stack;
          },
          getFileList: function () {
              return this.fileManager.list();
          },
          getFilesSize: function () {
              return this.fileManager.getTotalSize();
          },
          getFilesCount: function (includeInitial) {
              var self = this, len = self.isAjaxUpload ? self.fileManager.count() : self._inputFileCount();
              if (includeInitial) {
                  len += self.previewCache.count(true);
              }
              return self._getFileCount(len);
          },
          readFiles: function (files) {
              this.reader = new FileReader();
              var self = this, reader = self.reader, $container = self.$previewContainer,
                  $status = self.$previewStatus, msgLoading = self.msgLoading, msgProgress = self.msgProgress,
                  previewInitId = self.previewInitId, numFiles = files.length, settings = self.fileTypeSettings,
                  readFile, fileTypes = self.allowedFileTypes, typLen = fileTypes ? fileTypes.length : 0,
                  fileExt = self.allowedFileExtensions, strExt = $h.isEmpty(fileExt) ? '' : fileExt.join(', '),
                  throwError = function (msg, file, previewId, index, fileId) {
                      var $thumb, p1 = $.extend(true, {}, self._getOutData(null, {}, {}, files),
                          {id: previewId, index: index, fileId: fileId}),
                          p2 = {id: previewId, index: index, fileId: fileId, file: file, files: files};
                      self._previewDefault(file, true);
                      $thumb = self._getFrame(previewId, true);
                      if (self.isAjaxUpload) {
                          setTimeout(function () {
                              readFile(index + 1);
                          }, self.processDelay);
                      } else {
                          self.unlock();
                          numFiles = 0;
                      }
                      if (self.removeFromPreviewOnError && $thumb.length) {
                          $thumb.remove();
                      } else {
                          self._initFileActions();
                          $thumb.find('.kv-file-upload').remove();
                      }
                      self.isPersistentError = true;
                      self.isError = self.isAjaxUpload ? self._showFileError(msg, p1) : self._showError(msg, p2);
                      self._updateFileDetails(numFiles);
                  };
              self.fileManager.clearImages();
              $.each(files, function (key, file) {
                  var func = self.fileTypeSettings.image;
                  if (func && func(file.type)) {
                      self.fileManager.totalImages++;
                  }
              });
              readFile = function (i) {
                  var $error = self.$errorContainer, errors, fm = self.fileManager;
                  if (i >= numFiles) {
                      self.unlock();
                      if (self.duplicateErrors.length) {
                          errors = '<li>' + self.duplicateErrors.join('</li><li>') + '</li>';
                          if ($error.find('ul').length === 0) {
                              $h.setHtml($error, self.errorCloseButton + '<ul>' + errors + '</ul>');
                          } else {
                              $error.find('ul').append(errors);
                          }
                          $error.fadeIn(self.fadeDelay);
                          self._handler($error.find('.kv-error-close'), 'click', function () {
                              $error.fadeOut(self.fadeDelay);
                          });
                          self.duplicateErrors = [];
                      }
                      if (self.isAjaxUpload) {
                          self._raise('filebatchselected', [fm.stack]);
                          if (fm.count() === 0 && !self.isError) {
                              self.reset();
                          }
                      } else {
                          self._raise('filebatchselected', [files]);
                      }
                      $container.removeClass('file-thumb-loading');
                      $status.html('');
                      return;
                  }
                  self.lock(true);
                  var file = files[i], id = self._getFileId(file), previewId = previewInitId + '-' + id, fSizeKB, j, msg,
                      fnImage = settings.image, typ, chk, typ1, typ2,
                      caption = self._getFileName(file, ''), fileSize = (file && file.size || 0) / 1000,
                      fileExtExpr = '', previewData = $h.createObjectURL(file), fileCount = 0,
                      strTypes = '', fileId, canLoad, fileReaderAborted = false,
                      func, knownTypes = 0, isImage, txtFlag, processFileLoaded = function () {
                          var msg = msgProgress.setTokens({
                              'index': i + 1,
                              'files': numFiles,
                              'percent': 50,
                              'name': caption
                          });
                          setTimeout(function () {
                              $status.html(msg);
                              self._updateFileDetails(numFiles);
                              readFile(i + 1);
                          }, self.processDelay);
                          if (self._raise('fileloaded', [file, previewId, id, i, reader]) && self.isAjaxUpload) {
                              fm.add(file);
                          }
                      };
                  if (!file) {
                      return;
                  }
                  fileId = fm.getId(file);
                  if (typLen > 0) {
                      for (j = 0; j < typLen; j++) {
                          typ1 = fileTypes[j];
                          typ2 = self.msgFileTypes[typ1] || typ1;
                          strTypes += j === 0 ? typ2 : ', ' + typ2;
                      }
                  }
                  if (caption === false) {
                      readFile(i + 1);
                      return;
                  }
                  if (caption.length === 0) {
                      msg = self.msgInvalidFileName.replace('{name}', $h.htmlEncode($h.getFileName(file), '[unknown]'));
                      throwError(msg, file, previewId, i, fileId);
                      return;
                  }
                  if (!$h.isEmpty(fileExt)) {
                      fileExtExpr = new RegExp('\\.(' + fileExt.join('|') + ')$', 'i');
                  }
                  fSizeKB = fileSize.toFixed(2);
                  if (self.isAjaxUpload && fm.exists(fileId) || self._getFrame(previewId, true).length) {
                      var p2 = {id: previewId, index: i, fileId: fileId, file: file, files: files};
                      msg = self.msgDuplicateFile.setTokens({name: caption, size: fSizeKB});
                      if (self.isAjaxUpload) {
                          self.duplicateErrors.push(msg);
                          self.isDuplicateError = true;
                          self._raise('fileduplicateerror', [file, fileId, caption, fSizeKB, previewId, i]);
                          readFile(i + 1);
                          self._updateFileDetails(numFiles);
                      } else {
                          self._showError(msg, p2);
                          self.unlock();
                          numFiles = 0;
                          self._clearFileInput();
                          self.reset();
                          self._updateFileDetails(numFiles);
                      }
                      return;
                  }
                  if (self.maxFileSize > 0 && fileSize > self.maxFileSize) {
                      msg = self.msgSizeTooLarge.setTokens({
                          'name': caption,
                          'size': fSizeKB,
                          'maxSize': self.maxFileSize
                      });
                      throwError(msg, file, previewId, i, fileId);
                      return;
                  }
                  if (self.minFileSize !== null && fileSize <= $h.getNum(self.minFileSize)) {
                      msg = self.msgSizeTooSmall.setTokens({
                          'name': caption,
                          'size': fSizeKB,
                          'minSize': self.minFileSize
                      });
                      throwError(msg, file, previewId, i, fileId);
                      return;
                  }
                  if (!$h.isEmpty(fileTypes) && $h.isArray(fileTypes)) {
                      for (j = 0; j < fileTypes.length; j += 1) {
                          typ = fileTypes[j];
                          func = settings[typ];
                          fileCount += !func || (typeof func !== 'function') ? 0 : (func(file.type,
                              $h.getFileName(file)) ? 1 : 0);
                      }
                      if (fileCount === 0) {
                          msg = self.msgInvalidFileType.setTokens({name: caption, types: strTypes});
                          throwError(msg, file, previewId, i, fileId);
                          return;
                      }
                  }
                  if (fileCount === 0 && !$h.isEmpty(fileExt) && $h.isArray(fileExt) && !$h.isEmpty(fileExtExpr)) {
                      chk = $h.compare(caption, fileExtExpr);
                      fileCount += $h.isEmpty(chk) ? 0 : chk.length;
                      if (fileCount === 0) {
                          msg = self.msgInvalidFileExtension.setTokens({name: caption, extensions: strExt});
                          throwError(msg, file, previewId, i, fileId);
                          return;
                      }
                  }
                  if (!self._canPreview(file)) {
                      canLoad = self.isAjaxUpload && self._raise('filebeforeload', [file, i, reader]);
                      if (self.isAjaxUpload && canLoad) {
                          fm.add(file);
                      }
                      if (self.showPreview && canLoad) {
                          $container.addClass('file-thumb-loading');
                          self._previewDefault(file);
                          self._initFileActions();
                      }
                      setTimeout(function () {
                          if (canLoad) {
                              self._updateFileDetails(numFiles);
                          }
                          readFile(i + 1);
                          self._raise('fileloaded', [file, previewId, id, i]);
                      }, 10);
                      return;
                  }
                  isImage = fnImage(file.type, caption);
                  $status.html(msgLoading.replace('{index}', i + 1).replace('{files}', numFiles));
                  $container.addClass('file-thumb-loading');
                  reader.onerror = function (evt) {
                      self._errorHandler(evt, caption);
                  };
                  reader.onload = function (theFile) {
                      var hex, fileInfo, uint, byte, bytes = [], contents, mime, readImage = function () {
                          var newReader = new FileReader();
                          newReader.onerror = function (theFileNew) {
                              self._errorHandler(theFileNew, caption);
                          };
                          newReader.onload = function (theFileNew) {
                              if (self.isAjaxUpload && !self._raise('filebeforeload', [file, i, reader])) {
                                  fileReaderAborted = true;
                                  self._resetCaption();
                                  reader.abort();
                                  $status.html('');
                                  $container.removeClass('file-thumb-loading');
                                  self.enable();
                                  return;
                              }
                              self._previewFile(i, file, theFileNew, previewData, fileInfo);
                              self._initFileActions();
                              processFileLoaded();
                          };
                          newReader.readAsDataURL(file);
                      };
                      fileInfo = {'name': caption, 'type': file.type};
                      $.each(settings, function (k, f) {
                          if (k !== 'object' && k !== 'other' && typeof f === 'function' && f(file.type, caption)) {
                              knownTypes++;
                          }
                      });
                      if (knownTypes === 0) { // auto detect mime types from content if no known file types detected
                          uint = new Uint8Array(theFile.target.result);
                          for (j = 0; j < uint.length; j++) {
                              byte = uint[j].toString(16);
                              bytes.push(byte);
                          }
                          hex = bytes.join('').toLowerCase().substring(0, 8);
                          mime = $h.getMimeType(hex, '', '');
                          if ($h.isEmpty(mime)) { // look for ascii text content
                              contents = $h.arrayBuffer2String(reader.result);
                              mime = $h.isSvg(contents) ? 'image/svg+xml' : $h.getMimeType(hex, contents, file.type);
                          }
                          fileInfo = {'name': caption, 'type': mime};
                          isImage = fnImage(mime, '');
                          if (isImage) {
                              readImage(txtFlag);
                              return;
                          }
                      }
                      if (self.isAjaxUpload && !self._raise('filebeforeload', [file, i, reader])) {
                          fileReaderAborted = true;
                          self._resetCaption();
                          reader.abort();
                          $status.html('');
                          $container.removeClass('file-thumb-loading');
                          self.enable();
                          return;
                      }
                      self._previewFile(i, file, theFile, previewData, fileInfo);
                      self._initFileActions();
                      processFileLoaded();
                  };
                  reader.onprogress = function (data) {
                      if (data.lengthComputable) {
                          var fact = (data.loaded / data.total) * 100, progress = Math.ceil(fact);
                          msg = msgProgress.setTokens({
                              'index': i + 1,
                              'files': numFiles,
                              'percent': progress,
                              'name': caption
                          });
                          setTimeout(function () {
                              if (!fileReaderAborted) {
                                  $status.html(msg);
                              }
                          }, self.processDelay);
                      }
                  };
                  if (isImage) {
                      reader.readAsDataURL(file);
                  } else {
                      reader.readAsArrayBuffer(file);
                  }
              };
  
              readFile(0);
              self._updateFileDetails(numFiles, true);
          },
          lock: function (selectMode) {
              var self = this, $container = self.$container;
              self._resetErrors();
              self.disable();
              if (!selectMode && self.showCancel) {
                  $container.find('.fileinput-cancel').show();
              }
              if (!selectMode && self.showPause) {
                  $container.find('.fileinput-pause').show();
              }
              self._raise('filelock', [self.fileManager.stack, self._getExtraData()]);
              return self.$element;
          },
          unlock: function (reset) {
              var self = this, $container = self.$container;
              if (reset === undefined) {
                  reset = true;
              }
              self.enable();
              $container.removeClass('is-locked');
              if (self.showCancel) {
                  $container.find('.fileinput-cancel').hide();
              }
              if (self.showPause) {
                  $container.find('.fileinput-pause').hide();
              }
              if (reset) {
                  self._resetFileStack();
              }
              self._raise('fileunlock', [self.fileManager.stack, self._getExtraData()]);
              return self.$element;
          },
          resume: function () {
              var self = this, fm = self.fileManager, flag = false, rm = self.resumableManager;
              fm.bpsLog = [];
              fm.bps = 0;
              if (!self.enableResumableUpload) {
                  return self.$element;
              }
              if (self.paused) {
                  self._toggleResumableProgress(self.progressPauseTemplate, self.msgUploadResume);
              } else {
                  flag = true;
              }
              self.paused = false;
              if (flag) {
                  self._toggleResumableProgress(self.progressInfoTemplate, self.msgUploadBegin);
              }
              setTimeout(function () {
                  rm.upload();
              }, self.processDelay);
              return self.$element;
          },
          pause: function () {
              var self = this, rm = self.resumableManager, xhr = self.ajaxRequests, len = xhr.length, i,
                  pct = rm.getProgress(), actions = self.fileActionSettings, tm = self.taskManager,
                  pool = tm.getPool(rm.id);
              if (!self.enableResumableUpload) {
                  return self.$element;
              } else {
                  if (pool) {
                      pool.cancel();
                  }
              }
              self._raise('fileuploadpaused', [self.fileManager, rm]);
              if (len > 0) {
                  for (i = 0; i < len; i += 1) {
                      self.paused = true;
                      xhr[i].abort();
                  }
              }
              if (self.showPreview) {
                  self._getThumbs().each(function () {
                      var $thumb = $(this), t = self._getLayoutTemplate('stats'), stats,
                          $indicator = $thumb.find('.file-upload-indicator');
                      $thumb.removeClass('file-uploading');
                      if ($indicator.attr('title') === actions.indicatorLoadingTitle) {
                          self._setThumbStatus($thumb, 'Paused');
                          stats = t.setTokens({pendingTime: self.msgPaused, uploadSpeed: ''});
                          self.paused = true;
                          self._setProgress(pct, $thumb.find('.file-thumb-progress'), pct + '%', stats);
                      }
                      if (!self._getThumbFile($thumb)) {
                          $thumb.find('.kv-file-remove').removeClass('disabled').removeAttr('disabled');
                      }
                  });
              }
              self._setProgress(101, self.$progress, self.msgPaused);
              return self.$element;
          },
          cancel: function () {
              var self = this, xhr = self.ajaxRequests,
                  rm = self.resumableManager, tm = self.taskManager,
                  pool = rm ? tm.getPool(rm.id) : undefined, len = xhr.length, i;
  
              if (self.enableResumableUpload && pool) {
                  pool.cancel().done(function () {
                      self._setProgressCancelled();
                  });
                  rm.reset();
                  self._raise('fileuploadcancelled', [self.fileManager, rm]);
              } else {
                  self._raise('fileuploadcancelled', [self.fileManager]);
              }
              self._initAjax();
              if (len > 0) {
                  for (i = 0; i < len; i += 1) {
                      self.cancelling = true;
                      xhr[i].abort();
                  }
              }
              self._getThumbs().each(function () {
                  var $thumb = $(this), $prog = $thumb.find('.file-thumb-progress');
                  $thumb.removeClass('file-uploading');
                  self._setProgress(0, $prog);
                  $prog.hide();
                  if (!self._getThumbFile($thumb)) {
                      $thumb.find('.kv-file-upload').removeClass('disabled').removeAttr('disabled');
                      $thumb.find('.kv-file-remove').removeClass('disabled').removeAttr('disabled');
                  }
                  self.unlock();
              });
              setTimeout(function () {
                  self._setProgressCancelled();
              }, self.processDelay);
              return self.$element;
          },
          clear: function () {
              var self = this, cap;
              if (!self._raise('fileclear')) {
                  return;
              }
              self.$btnUpload.removeAttr('disabled');
              self._getThumbs().find('video,audio,img').each(function () {
                  $h.cleanMemory($(this));
              });
              self._clearFileInput();
              self._resetUpload();
              self.clearFileStack();
              self.isDuplicateError = false;
              self.isPersistentError = false;
              self._resetErrors(true);
              if (self._hasInitialPreview()) {
                  self._showFileIcon();
                  self._resetPreview();
                  self._initPreviewActions();
                  self.$container.removeClass('file-input-new');
              } else {
                  self._getThumbs().each(function () {
                      self._clearObjects($(this));
                  });
                  if (self.isAjaxUpload) {
                      self.previewCache.data = {};
                  }
                  self.$preview.html('');
                  cap = (!self.overwriteInitial && self.initialCaption.length > 0) ? self.initialCaption : '';
                  self.$caption.attr('title', '').val(cap);
                  $h.addCss(self.$container, 'file-input-new');
                  self._validateDefaultPreview();
              }
              if (self.$container.find($h.FRAMES).length === 0) {
                  if (!self._initCaption()) {
                      self.$captionContainer.removeClass('icon-visible');
                  }
              }
              self._hideFileIcon();
              if (self.focusCaptionOnClear) {
                  self.$captionContainer.focus();
              }
              self._setFileDropZoneTitle();
              self._raise('filecleared');
              return self.$element;
          },
          reset: function () {
              var self = this;
              if (!self._raise('filereset')) {
                  return;
              }
              self.lastProgress = 0;
              self._resetPreview();
              self.$container.find('.fileinput-filename').text('');
              $h.addCss(self.$container, 'file-input-new');
              if (self.getFrames().length) {
                  self.$container.removeClass('file-input-new');
              }
              self.clearFileStack();
              self._setFileDropZoneTitle();
              return self.$element;
          },
          disable: function () {
              var self = this, $container = self.$container;
              self.isDisabled = true;
              self._raise('filedisabled');
              self.$element.attr('disabled', 'disabled');
              $container.addClass('is-locked');
              $h.addCss($container.find('.btn-file'), 'disabled');
              $container.find('.kv-fileinput-caption').addClass('file-caption-disabled');
              $container.find('.fileinput-remove, .fileinput-upload, .file-preview-frame button')
                  .attr('disabled', true);
              self._initDragDrop();
              return self.$element;
          },
          enable: function () {
              var self = this, $container = self.$container;
              self.isDisabled = false;
              self._raise('fileenabled');
              self.$element.removeAttr('disabled');
              $container.removeClass('is-locked');
              $container.find('.kv-fileinput-caption').removeClass('file-caption-disabled');
              $container.find('.fileinput-remove, .fileinput-upload, .file-preview-frame button')
                  .removeAttr('disabled');
              $container.find('.btn-file').removeClass('disabled');
              self._initDragDrop();
              return self.$element;
          },
          upload: function () {
              var self = this, fm = self.fileManager, totLen = fm.count(), i, outData,
                  hasExtraData = !$.isEmptyObject(self._getExtraData());
              fm.bpsLog = [];
              fm.bps = 0;
              if (!self.isAjaxUpload || self.isDisabled || !self._isFileSelectionValid(totLen)) {
                  return;
              }
              self.lastProgress = 0;
              self._resetUpload();
              if (totLen === 0 && !hasExtraData) {
                  self._showFileError(self.msgUploadEmpty);
                  return;
              }
              self.cancelling = false;
              self._showProgress();
              self.lock();
              if (totLen === 0 && hasExtraData) {
                  self._setProgress(2);
                  self._uploadExtraOnly();
                  return;
              }
              if (self.enableResumableUpload) {
                  return self.resume();
              }
              if (self.uploadAsync || self.enableResumableUpload) {
                  outData = self._getOutData(null);
                  self._raise('filebatchpreupload', [outData]);
                  self.fileBatchCompleted = false;
                  self.uploadCache = [];
                  $.each(self.getFileStack(), function (id) {
                      var previewId = self._getThumbId(id);
                      self.uploadCache.push({id: previewId, content: null, config: null, tags: null, append: true});
                  });
                  self.$preview.find('.file-preview-initial').removeClass($h.SORT_CSS);
                  self._initSortable();
              }
              self._setProgress(2);
              self.hasInitData = false;
              if (self.uploadAsync) {
                  i = 0;
                  $.each(self.getFileStack(), function (id) {
                      self._uploadSingle(i, id, true);
                      i++;
                  });
                  return;
              }
              self._uploadBatch();
              return self.$element;
          },
          destroy: function () {
              var self = this, $form = self.$form, $cont = self.$container, $el = self.$element, ns = self.namespace;
              $(document).off(ns);
              $(window).off(ns);
              if ($form && $form.length) {
                  $form.off(ns);
              }
              if (self.isAjaxUpload) {
                  self._clearFileInput();
              }
              self._cleanup();
              self._initPreviewCache();
              $el.insertBefore($cont).off(ns).removeData();
              $cont.off().remove();
              return $el;
          },
          refresh: function (options) {
              var self = this, $el = self.$element;
              if (typeof options !== 'object' || $h.isEmpty(options)) {
                  options = self.options;
              } else {
                  options = $.extend(true, {}, self.options, options);
              }
              self._init(options, true);
              self._listen();
              return $el;
          },
          zoom: function (frameId) {
              var self = this, $frame = self._getFrame(frameId);
              self._showModal($frame);
          },
          getExif: function (frameId) {
              var self = this, $frame = self._getFrame(frameId);
              return $frame && $frame.data('exif') || null;
          },
          getFrames: function (cssFilter) {
              var self = this, $frames;
              cssFilter = cssFilter || '';
              $frames = self.$preview.find($h.FRAMES + cssFilter);
              if (self.reversePreviewOrder) {
                  $frames = $($frames.get().reverse());
              }
              return $frames;
          },
          getPreview: function () {
              var self = this;
              return {
                  content: self.initialPreview,
                  config: self.initialPreviewConfig,
                  tags: self.initialPreviewThumbTags
              };
          }
      };
  
      $.fn.fileinput = function (option) {
          if (!$h.hasFileAPISupport() && !$h.isIE(9)) {
              return;
          }
          var args = Array.apply(null, arguments), retvals = [];
          args.shift();
          this.each(function () {
              var 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;
          }
      };
  
      var IFRAME_ATTRIBS = 'class="kv-preview-data file-preview-pdf" src="{renderer}?file={data}" {style}';
  
      $.fn.fileinput.defaults = {
          language: 'en',
          showCaption: true,
          showBrowse: true,
          showPreview: true,
          showRemove: true,
          showUpload: true,
          showUploadStats: true,
          showCancel: null,
          showPause: null,
          showClose: true,
          showUploadedThumbs: true,
          showConsoleLogs: false,
          browseOnZoneClick: false,
          autoReplace: false,
          autoOrientImage: function () { // applicable for JPEG images only and non ios safari
              var ua = window.navigator.userAgent, webkit = !!ua.match(/WebKit/i),
                  iOS = !!ua.match(/iP(od|ad|hone)/i), iOSSafari = iOS && webkit && !ua.match(/CriOS/i);
              return !iOSSafari;
          },
          autoOrientImageInitial: true,
          required: false,
          rtl: false,
          hideThumbnailContent: false,
          encodeUrl: true,
          focusCaptionOnBrowse: true,
          focusCaptionOnClear: true,
          generateFileId: null,
          previewClass: '',
          captionClass: '',
          frameClass: 'krajee-default',
          mainClass: 'file-caption-main',
          mainTemplate: null,
          fileSizeGetter: null,
          initialCaption: '',
          initialPreview: [],
          initialPreviewDelimiter: '*$$*',
          initialPreviewAsData: false,
          initialPreviewFileType: 'image',
          initialPreviewConfig: [],
          initialPreviewThumbTags: [],
          previewThumbTags: {},
          initialPreviewShowDelete: true,
          initialPreviewDownloadUrl: '',
          removeFromPreviewOnError: false,
          deleteUrl: '',
          deleteExtraData: {},
          overwriteInitial: true,
          sanitizeZoomCache: function (content) {
              var $container = $h.createElement(content);
              $container.find('input,textarea,select,datalist,form,.file-thumbnail-footer').remove();
              return $container.html();
          },
          previewZoomButtonIcons: {
              prev: '<i class="glyphicon glyphicon-triangle-left"></i>',
              next: '<i class="glyphicon glyphicon-triangle-right"></i>',
              toggleheader: '<i class="glyphicon glyphicon-resize-vertical"></i>',
              fullscreen: '<i class="glyphicon glyphicon-fullscreen"></i>',
              borderless: '<i class="glyphicon glyphicon-resize-full"></i>',
              close: '<i class="glyphicon glyphicon-remove"></i>'
          },
          previewZoomButtonClasses: {
              prev: 'btn btn-navigate',
              next: 'btn btn-navigate',
              toggleheader: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
              fullscreen: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
              borderless: 'btn btn-sm btn-kv btn-default btn-outline-secondary',
              close: 'btn btn-sm btn-kv btn-default btn-outline-secondary'
          },
          previewTemplates: {},
          previewContentTemplates: {},
          preferIconicPreview: false,
          preferIconicZoomPreview: false,
          allowedFileTypes: null,
          allowedFileExtensions: null,
          allowedPreviewTypes: undefined,
          allowedPreviewMimeTypes: null,
          allowedPreviewExtensions: null,
          disabledPreviewTypes: undefined,
          disabledPreviewExtensions: ['msi', 'exe', 'com', 'zip', 'rar', 'app', 'vb', 'scr'],
          disabledPreviewMimeTypes: null,
          defaultPreviewContent: null,
          customLayoutTags: {},
          customPreviewTags: {},
          previewFileIcon: '<i class="glyphicon glyphicon-file"></i>',
          previewFileIconClass: 'file-other-icon',
          previewFileIconSettings: {},
          previewFileExtSettings: {},
          buttonLabelClass: 'hidden-xs',
          browseIcon: '<i class="glyphicon glyphicon-folder-open"></i>&nbsp;',
          browseClass: 'btn btn-primary',
          removeIcon: '<i class="glyphicon glyphicon-trash"></i>',
          removeClass: 'btn btn-default btn-secondary',
          cancelIcon: '<i class="glyphicon glyphicon-ban-circle"></i>',
          cancelClass: 'btn btn-default btn-secondary',
          pauseIcon: '<i class="glyphicon glyphicon-pause"></i>',
          pauseClass: 'btn btn-default btn-secondary',
          uploadIcon: '<i class="glyphicon glyphicon-upload"></i>',
          uploadClass: 'btn btn-default btn-secondary',
          uploadUrl: null,
          uploadUrlThumb: null,
          uploadAsync: true,
          uploadParamNames: {
              chunkCount: 'chunkCount',
              chunkIndex: 'chunkIndex',
              chunkSize: 'chunkSize',
              chunkSizeStart: 'chunkSizeStart',
              chunksUploaded: 'chunksUploaded',
              fileBlob: 'fileBlob',
              fileId: 'fileId',
              fileName: 'fileName',
              fileRelativePath: 'fileRelativePath',
              fileSize: 'fileSize',
              retryCount: 'retryCount'
          },
          maxAjaxThreads: 5,
          fadeDelay: 800,
          processDelay: 100,
          bitrateUpdateDelay: 500,
          queueDelay: 10, // must be lesser than process delay
          progressDelay: 0, // must be lesser than process delay
          enableResumableUpload: false,
          resumableUploadOptions: {
              fallback: null,
              testUrl: null, // used for checking status of chunks/ files previously / partially uploaded
              chunkSize: 2 * 1024, // in KB
              maxThreads: 4,
              maxRetries: 3,
              showErrorLog: true,
              retainErrorHistory: true, // display complete error history always unless user explicitly resets upload
              skipErrorsAndProceed: false // when set to true, files with errors will be skipped and upload will continue with other files
          },
          uploadExtraData: {},
          zoomModalHeight: 480,
          minImageWidth: null,
          minImageHeight: null,
          maxImageWidth: null,
          maxImageHeight: null,
          resizeImage: false,
          resizePreference: 'width',
          resizeQuality: 0.92,
          resizeDefaultImageType: 'image/jpeg',
          resizeIfSizeMoreThan: 0, // in KB
          minFileSize: -1,
          maxFileSize: 0,
          maxFilePreviewSize: 25600, // 25 MB
          minFileCount: 0,
          maxFileCount: 0,
          maxTotalFileCount: 0,
          validateInitialCount: false,
          msgValidationErrorClass: 'text-danger',
          msgValidationErrorIcon: '<i class="glyphicon glyphicon-exclamation-sign"></i> ',
          msgErrorClass: 'file-error-message',
          progressThumbClass: 'progress-bar progress-bar-striped active progress-bar-animated',
          progressClass: 'progress-bar bg-success progress-bar-success progress-bar-striped active progress-bar-animated',
          progressInfoClass: 'progress-bar bg-info progress-bar-info progress-bar-striped active progress-bar-animated',
          progressCompleteClass: 'progress-bar bg-success progress-bar-success',
          progressPauseClass: 'progress-bar bg-primary progress-bar-primary progress-bar-striped active progress-bar-animated',
          progressErrorClass: 'progress-bar bg-danger progress-bar-danger',
          progressUploadThreshold: 99,
          previewFileType: 'image',
          elCaptionContainer: null,
          elCaptionText: null,
          elPreviewContainer: null,
          elPreviewImage: null,
          elPreviewStatus: null,
          elErrorContainer: null,
          errorCloseButton: $h.closeButton('kv-error-close'),
          slugCallback: null,
          dropZoneEnabled: true,
          dropZoneTitleClass: 'file-drop-zone-title',
          fileActionSettings: {},
          otherActionButtons: '',
          textEncoding: 'UTF-8',
          preProcessUpload: null,
          ajaxSettings: {},
          ajaxDeleteSettings: {},
          showAjaxErrorDetails: true,
          mergeAjaxCallbacks: false,
          mergeAjaxDeleteCallbacks: false,
          retryErrorUploads: true,
          reversePreviewOrder: false,
          usePdfRenderer: function () {
              var isIE11 = !!window.MSInputMethodContext && !!document.documentMode;
              return !!navigator.userAgent.match(/(iPod|iPhone|iPad|Android)/i) || isIE11;
          },
          pdfRendererUrl: '',
          pdfRendererTemplate: '<iframe ' + IFRAME_ATTRIBS + '></iframe>'
      };
  
      // noinspection HtmlUnknownAttribute
      $.fn.fileinputLocales.en = {
          fileSingle: 'file',
          filePlural: 'files',
          browseLabel: 'Browse &hellip;',
          removeLabel: 'Remove',
          removeTitle: 'Clear all unprocessed files',
          cancelLabel: 'Cancel',
          cancelTitle: 'Abort ongoing upload',
          pauseLabel: 'Pause',
          pauseTitle: 'Pause ongoing upload',
          uploadLabel: 'Upload',
          uploadTitle: 'Upload selected files',
          msgNo: 'No',
          msgNoFilesSelected: 'No files selected',
          msgCancelled: 'Cancelled',
          msgPaused: 'Paused',
          msgPlaceholder: 'Select {files} ...',
          msgZoomModalHeading: 'Detailed Preview',
          msgFileRequired: 'You must select a file to upload.',
          msgSizeTooSmall: 'File "{name}" (<b>{size} KB</b>) is too small and must be larger than <b>{minSize} KB</b>.',
          msgSizeTooLarge: 'File "{name}" (<b>{size} KB</b>) exceeds maximum allowed upload size of <b>{maxSize} KB</b>.',
          msgFilesTooLess: 'You must select at least <b>{n}</b> {files} to upload.',
          msgFilesTooMany: 'Number of files selected for upload <b>({n})</b> exceeds maximum allowed limit of <b>{m}</b>.',
          msgTotalFilesTooMany: 'You can upload a maximum of <b>{m}</b> files (<b>{n}</b> files detected).',
          msgFileNotFound: 'File "{name}" not found!',
          msgFileSecured: 'Security restrictions prevent reading the file "{name}".',
          msgFileNotReadable: 'File "{name}" is not readable.',
          msgFilePreviewAborted: 'File preview aborted for "{name}".',
          msgFilePreviewError: 'An error occurred while reading the file "{name}".',
          msgInvalidFileName: 'Invalid or unsupported characters in file name "{name}".',
          msgInvalidFileType: 'Invalid type for file "{name}". Only "{types}" files are supported.',
          msgInvalidFileExtension: 'Invalid extension for file "{name}". Only "{extensions}" files are supported.',
          msgFileTypes: {
              'image': 'image',
              'html': 'HTML',
              'text': 'text',
              'video': 'video',
              'audio': 'audio',
              'flash': 'flash',
              'pdf': 'PDF',
              'object': 'object'
          },
          msgUploadAborted: 'The file upload was aborted',
          msgUploadThreshold: 'Processing &hellip;',
          msgUploadBegin: 'Initializing &hellip;',
          msgUploadEnd: 'Done',
          msgUploadResume: 'Resuming upload &hellip;',
          msgUploadEmpty: 'No valid data available for upload.',
          msgUploadError: 'Upload Error',
          msgDeleteError: 'Delete Error',
          msgProgressError: 'Error',
          msgValidationError: 'Validation Error',
          msgLoading: 'Loading file {index} of {files} &hellip;',
          msgProgress: 'Loading file {index} of {files} - {name} - {percent}% completed.',
          msgSelected: '{n} {files} selected',
          msgFoldersNotAllowed: 'Drag & drop files only! {n} folder(s) dropped were skipped.',
          msgImageWidthSmall: 'Width of image file "{name}" must be at least {size} px.',
          msgImageHeightSmall: 'Height of image file "{name}" must be at least {size} px.',
          msgImageWidthLarge: 'Width of image file "{name}" cannot exceed {size} px.',
          msgImageHeightLarge: 'Height of image file "{name}" cannot exceed {size} px.',
          msgImageResizeError: 'Could not get the image dimensions to resize.',
          msgImageResizeException: 'Error while resizing the image.<pre>{errors}</pre>',
          msgAjaxError: 'Something went wrong with the {operation} operation. Please try again later!',
          msgAjaxProgressError: '{operation} failed',
          msgDuplicateFile: 'File "{name}" of same size "{size} KB" has already been selected earlier. Skipping duplicate selection.',
          msgResumableUploadRetriesExceeded: 'Upload aborted beyond <b>{max}</b> retries for file <b>{file}</b>! Error Details: <pre>{error}</pre>',
          msgPendingTime: '{time} remaining',
          msgCalculatingTime: 'calculating time remaining',
          ajaxOperations: {
              deleteThumb: 'file delete',
              uploadThumb: 'file upload',
              uploadBatch: 'batch file upload',
              uploadExtra: 'form data upload'
          },
          dropZoneTitle: 'Drag & drop files here &hellip;',
          dropZoneClickTitle: '<br>(or click to select {files})',
          previewZoomButtonTitles: {
              prev: 'View previous file',
              next: 'View next file',
              toggleheader: 'Toggle header',
              fullscreen: 'Toggle full screen',
              borderless: 'Toggle borderless mode',
              close: 'Close detailed preview'
          }
      };
  
      $.fn.fileinput.Constructor = FileInput;
  
      /**
       * Convert automatically file inputs with class 'file' into a bootstrap fileinput control.
       */
      $(document).ready(function () {
          var $input = $('input.file[type=file]');
          if ($input.length) {
              $input.fileinput();
          }
      });
  }));
  