/*

   * jQuery File Upload Plugin 5.32.2

   * https://github.com/blueimp/jQuery-File-Upload
   *
   * Copyright 2010, Sebastian Tschan
   * https://blueimp.net
   *
   * Licensed under the MIT license:
   * http://www.opensource.org/licenses/MIT
   */
  
  /*jslint nomen: true, unparam: true, regexp: true */

  /*global define, window, document, location, File, Blob, FormData */

  
  (function (factory) {
      'use strict';
      if (typeof define === 'function' && define.amd) {
          // Register as an anonymous AMD module:
          define([
              'jquery',
              'jquery.ui.widget'
          ], factory);
      } else {
          // Browser globals:
          factory(window.jQuery);
      }
  }(function ($) {
      'use strict';

      // Detect file input support, based on
      // http://viljamis.com/blog/2012/file-upload-support-on-mobile/
      $.support.fileInput = !(new RegExp(
          // Handle devices which give false positives for the feature detection:
          '(Android (1\\.[0156]|2\\.[01]))' +
              '|(Windows Phone (OS 7|8\\.0))|(XBLWP)|(ZuneWP)|(WPDesktop)' +
              '|(w(eb)?OSBrowser)|(webOS)' +
              '|(Kindle/(1\\.0|2\\.[05]|3\\.0))'
      ).test(window.navigator.userAgent) ||
          // Feature detection for all other devices:
          $('<input type="file">').prop('disabled'));

      // The FileReader API is not actually used, but works as feature detection,
      // as e.g. Safari supports XHR file uploads via the FormData API,
      // but not non-multipart XHR file uploads:
      $.support.xhrFileUpload = !!(window.XMLHttpRequestUpload && window.FileReader);
      $.support.xhrFormDataFileUpload = !!window.FormData;

      // Detect support for Blob slicing (required for chunked uploads):
      $.support.blobSlice = window.Blob && (Blob.prototype.slice ||
          Blob.prototype.webkitSlice || Blob.prototype.mozSlice);

      // The fileupload widget listens for change events on file input fields defined
      // via fileInput setting and paste or drop events of the given dropZone.
      // In addition to the default jQuery Widget methods, the fileupload widget
      // exposes the "add" and "send" methods, to add or directly send files using
      // the fileupload API.
      // By default, files added via file input selection, paste, drag & drop or
      // "add" method are uploaded immediately, but it is possible to override
      // the "add" callback option to queue file uploads.
      $.widget('blueimp.fileupload', {
  
          options: {

              // The drop target element(s), by the default the complete document.
              // Set to null to disable drag & drop support:

              dropZone: $(document),

              // The paste target element(s), by the default the complete document.
              // Set to null to disable paste support:
              pasteZone: $(document),
              // The file input field(s), that are listened to for change events.

              // If undefined, it is set to the file input fields inside
              // of the widget element on plugin initialization.

              // Set to null to disable the change listener.

              fileInput: undefined,
              // By default, the file input field is replaced with a clone after
              // each input field change event. This is required for iframe transport
              // queues and allows change events to be fired for the same file
              // selection, but can be disabled by setting the following option to false:
              replaceFileInput: true,
              // The parameter name for the file form data (the request argument name).
              // If undefined or empty, the name property of the file input field is

              // used, or "files[]" if the file input name property is also empty,
              // can be a string or an array of strings:

              paramName: undefined,
              // By default, each file of a selection is uploaded using an individual
              // request for XHR type uploads. Set to false to upload file
              // selections in one request each:
              singleFileUploads: true,
              // To limit the number of files uploaded with one XHR request,
              // set the following option to an integer greater than 0:
              limitMultiFileUploads: undefined,
              // Set the following option to true to issue all file upload requests
              // in a sequential order:
              sequentialUploads: false,
              // To limit the number of concurrent uploads,
              // set the following option to an integer greater than 0:
              limitConcurrentUploads: undefined,
              // Set the following option to true to force iframe transport uploads:
              forceIframeTransport: false,
              // Set the following option to the location of a redirect url on the
              // origin server, for cross-domain iframe transport uploads:
              redirect: undefined,
              // The parameter name for the redirect url, sent as part of the form
              // data and set to 'redirect' if this option is empty:
              redirectParamName: undefined,
              // Set the following option to the location of a postMessage window,
              // to enable postMessage transport uploads:
              postMessage: undefined,
              // By default, XHR file uploads are sent as multipart/form-data.
              // The iframe transport is always using multipart/form-data.
              // Set to false to enable non-multipart XHR uploads:
              multipart: true,
              // To upload large files in smaller chunks, set the following option
              // to a preferred maximum chunk size. If set to 0, null or undefined,
              // or the browser does not support the required Blob API, files will
              // be uploaded as a whole.
              maxChunkSize: undefined,
              // When a non-multipart upload or a chunked multipart upload has been
              // aborted, this option can be used to resume the upload by setting
              // it to the size of the already uploaded bytes. This option is most
              // useful when modifying the options object inside of the "add" or
              // "send" callbacks, as the options are cloned for each file upload.
              uploadedBytes: undefined,
              // By default, failed (abort or error) file uploads are removed from the
              // global progress calculation. Set the following option to false to
              // prevent recalculating the global progress data:
              recalculateProgress: true,

              // Interval in milliseconds to calculate and trigger progress events:
              progressInterval: 100,
              // Interval in milliseconds to calculate progress bitrate:
              bitrateInterval: 500,
              // By default, uploads are started automatically when adding files:
              autoUpload: true,
  
              // Error and info messages:
              messages: {
                  uploadedBytes: 'Uploaded bytes exceed file size'
              },
  
              // Translation function, gets the message key to be translated
              // and an object with context specific data as arguments:
              i18n: function (message, context) {
                  message = this.messages[message] || message.toString();
                  if (context) {
                      $.each(context, function (key, value) {
                          message = message.replace('{' + key + '}', value);
                      });
                  }
                  return message;
              },

  
              // Additional form data to be sent along with the file uploads can be set
              // using this option, which accepts an array of objects with name and
              // value properties, a function returning such an array, a FormData
              // object (for XHR file uploads), or a simple object.
              // The form of the first fileInput is given as parameter to the function:
              formData: function (form) {
                  return form.serializeArray();
              },
  
              // The add callback is invoked as soon as files are added to the fileupload
              // widget (via file input selection, drag & drop, paste or add API call).
              // If the singleFileUploads option is enabled, this callback will be

              // called once for each file in the selection for XHR file uploads, else

              // once for each file selection.

              //

              // The upload starts when the submit method is invoked on the data parameter.
              // The data object contains a files property holding the added files

              // and allows you to override plugin options as well as define ajax settings.
              //

              // Listeners for this callback can also be bound the following way:
              // .bind('fileuploadadd', func);

              //

              // data.submit() returns a Promise object and allows to attach additional
              // handlers using jQuery's Deferred callbacks:
              // data.submit().done(func).fail(func).always(func);
              add: function (e, data) {

                  if (data.autoUpload || (data.autoUpload !== false &&
                          $(this).fileupload('option', 'autoUpload'))) {
                      data.process().done(function () {
                          data.submit();
                      });
                  }

              },
  
              // Other callbacks:

              // Callback for the submit event of each file upload:
              // submit: function (e, data) {}, // .bind('fileuploadsubmit', func);

              // Callback for the start of each file upload request:
              // send: function (e, data) {}, // .bind('fileuploadsend', func);

              // Callback for successful uploads:
              // done: function (e, data) {}, // .bind('fileuploaddone', func);

              // Callback for failed (abort or error) uploads:
              // fail: function (e, data) {}, // .bind('fileuploadfail', func);

              // Callback for completed (success, abort or error) requests:
              // always: function (e, data) {}, // .bind('fileuploadalways', func);

              // Callback for upload progress events:
              // progress: function (e, data) {}, // .bind('fileuploadprogress', func);

              // Callback for global upload progress events:
              // progressall: function (e, data) {}, // .bind('fileuploadprogressall', func);

              // Callback for uploads start, equivalent to the global ajaxStart event:
              // start: function (e) {}, // .bind('fileuploadstart', func);

              // Callback for uploads stop, equivalent to the global ajaxStop event:
              // stop: function (e) {}, // .bind('fileuploadstop', func);

  
              // Callback for change events of the fileInput(s):

              // change: function (e, data) {}, // .bind('fileuploadchange', func);

  
              // Callback for paste events to the pasteZone(s):

              // paste: function (e, data) {}, // .bind('fileuploadpaste', func);

  
              // Callback for drop events of the dropZone(s):

              // drop: function (e, data) {}, // .bind('fileuploaddrop', func);

  
              // Callback for dragover events of the dropZone(s):

              // dragover: function (e) {}, // .bind('fileuploaddragover', func);

              // Callback for the start of each chunk upload request:
              // chunksend: function (e, data) {}, // .bind('fileuploadchunksend', func);
  
              // Callback for successful chunk uploads:
              // chunkdone: function (e, data) {}, // .bind('fileuploadchunkdone', func);
  
              // Callback for failed (abort or error) chunk uploads:
              // chunkfail: function (e, data) {}, // .bind('fileuploadchunkfail', func);
  
              // Callback for completed (success, abort or error) chunk upload requests:
              // chunkalways: function (e, data) {}, // .bind('fileuploadchunkalways', func);

              // The plugin options are used as settings object for the ajax calls.
              // The following are jQuery ajax settings required for the file uploads:
              processData: false,
              contentType: false,
              cache: false
          },

          // A list of options that require reinitializing event listeners and/or
          // special initialization code:
          _specialOptions: [

              'fileInput',

              'dropZone',
              'pasteZone',

              'multipart',
              'forceIframeTransport'
          ],

          _blobSlice: $.support.blobSlice && function () {
              var slice = this.slice || this.webkitSlice || this.mozSlice;
              return slice.apply(this, arguments);
          },
  
          _BitrateTimer: function () {
              this.timestamp = ((Date.now) ? Date.now() : (new Date()).getTime());
              this.loaded = 0;
              this.bitrate = 0;
              this.getBitrate = function (now, loaded, interval) {
                  var timeDiff = now - this.timestamp;
                  if (!this.bitrate || !interval || timeDiff > interval) {
                      this.bitrate = (loaded - this.loaded) * (1000 / timeDiff) * 8;
                      this.loaded = loaded;
                      this.timestamp = now;
                  }
                  return this.bitrate;
              };
          },

          _isXHRUpload: function (options) {
              return !options.forceIframeTransport &&
                  ((!options.multipart && $.support.xhrFileUpload) ||
                  $.support.xhrFormDataFileUpload);
          },
  
          _getFormData: function (options) {
              var formData;
              if (typeof options.formData === 'function') {
                  return options.formData(options.form);

              }
              if ($.isArray(options.formData)) {

                  return options.formData;

              }
              if ($.type(options.formData) === 'object') {

                  formData = [];
                  $.each(options.formData, function (name, value) {
                      formData.push({name: name, value: value});
                  });
                  return formData;
              }
              return [];
          },
  
          _getTotal: function (files) {
              var total = 0;
              $.each(files, function (index, file) {
                  total += file.size || 1;
              });
              return total;
          },

          _initProgressObject: function (obj) {
              var progress = {
                  loaded: 0,
                  total: 0,
                  bitrate: 0
              };
              if (obj._progress) {
                  $.extend(obj._progress, progress);
              } else {
                  obj._progress = progress;
              }
          },
  
          _initResponseObject: function (obj) {
              var prop;
              if (obj._response) {
                  for (prop in obj._response) {
                      if (obj._response.hasOwnProperty(prop)) {
                          delete obj._response[prop];
                      }
                  }
              } else {
                  obj._response = {};
              }
          },

          _onProgress: function (e, data) {
              if (e.lengthComputable) {

                  var now = ((Date.now) ? Date.now() : (new Date()).getTime()),
                      loaded;
                  if (data._time && data.progressInterval &&
                          (now - data._time < data.progressInterval) &&
                          e.loaded !== e.total) {
                      return;
                  }
                  data._time = now;
                  loaded = Math.floor(
                      e.loaded / e.total * (data.chunkSize || data._progress.total)
                  ) + (data.uploadedBytes || 0);
                  // Add the difference from the previously loaded state
                  // to the global loaded counter:
                  this._progress.loaded += (loaded - data._progress.loaded);
                  this._progress.bitrate = this._bitrateTimer.getBitrate(
                      now,
                      this._progress.loaded,
                      data.bitrateInterval
                  );
                  data._progress.loaded = data.loaded = loaded;
                  data._progress.bitrate = data.bitrate = data._bitrateTimer.getBitrate(
                      now,
                      loaded,
                      data.bitrateInterval
                  );

                  // Trigger a custom progress event with a total data property set
                  // to the file size(s) of the current upload and a loaded data
                  // property calculated accordingly:
                  this._trigger('progress', e, data);
                  // Trigger a global progress event for all current file uploads,
                  // including ajax calls queued for sequential file uploads:

                  this._trigger('progressall', e, this._progress);

              }
          },
  
          _initProgressListener: function (options) {
              var that = this,
                  xhr = options.xhr ? options.xhr() : $.ajaxSettings.xhr();
              // Accesss to the native XHR object is required to add event listeners
              // for the upload progress event:
              if (xhr.upload) {
                  $(xhr.upload).bind('progress', function (e) {
                      var oe = e.originalEvent;
                      // Make sure the progress event properties get copied over:
                      e.lengthComputable = oe.lengthComputable;
                      e.loaded = oe.loaded;
                      e.total = oe.total;
                      that._onProgress(e, options);
                  });
                  options.xhr = function () {
                      return xhr;
                  };
              }
          },

          _isInstanceOf: function (type, obj) {
              // Cross-frame instanceof check
              return Object.prototype.toString.call(obj) === '[object ' + type + ']';
          },

          _initXHRData: function (options) {

              var that = this,
                  formData,

                  file = options.files[0],
                  // Ignore non-multipart setting if not supported:

                  multipart = options.multipart || !$.support.xhrFileUpload,
                  paramName = options.paramName[0];
              options.headers = options.headers || {};
              if (options.contentRange) {
                  options.headers['Content-Range'] = options.contentRange;
              }
              if (!multipart || options.blob || !this._isInstanceOf('File', file)) {
                  options.headers['Content-Disposition'] = 'attachment; filename="' +
                      encodeURI(file.name) + '"';

              }

              if (!multipart) {
                  options.contentType = file.type;
                  options.data = options.blob || file;
              } else if ($.support.xhrFormDataFileUpload) {

                  if (options.postMessage) {
                      // window.postMessage does not allow sending FormData
                      // objects, so we just add the File/Blob objects to
                      // the formData array and let the postMessage window
                      // create the FormData object out of this array:
                      formData = this._getFormData(options);
                      if (options.blob) {
                          formData.push({

                              name: paramName,

                              value: options.blob
                          });
                      } else {
                          $.each(options.files, function (index, file) {
                              formData.push({

                                  name: options.paramName[index] || paramName,

                                  value: file
                              });
                          });
                      }
                  } else {

                      if (that._isInstanceOf('FormData', options.formData)) {

                          formData = options.formData;
                      } else {
                          formData = new FormData();
                          $.each(this._getFormData(options), function (index, field) {
                              formData.append(field.name, field.value);
                          });
                      }
                      if (options.blob) {

                          formData.append(paramName, options.blob, file.name);

                      } else {
                          $.each(options.files, function (index, file) {

                              // This check allows the tests to run with
                              // dummy objects:

                              if (that._isInstanceOf('File', file) ||
                                      that._isInstanceOf('Blob', file)) {
                                  formData.append(
                                      options.paramName[index] || paramName,
                                      file,
                                      file.name
                                  );

                              }
                          });
                      }
                  }
                  options.data = formData;
              }
              // Blob reference is not needed anymore, free memory:
              options.blob = null;
          },
  
          _initIframeSettings: function (options) {

              var targetHost = $('<a></a>').prop('href', options.url).prop('host');

              // Setting the dataType to iframe enables the iframe transport:
              options.dataType = 'iframe ' + (options.dataType || '');
              // The iframe transport accepts a serialized array as form data:
              options.formData = this._getFormData(options);
              // Add redirect url to form data on cross-domain uploads:

              if (options.redirect && targetHost && targetHost !== location.host) {

                  options.formData.push({
                      name: options.redirectParamName || 'redirect',
                      value: options.redirect
                  });
              }
          },
  
          _initDataSettings: function (options) {
              if (this._isXHRUpload(options)) {
                  if (!this._chunkedUpload(options, true)) {
                      if (!options.data) {
                          this._initXHRData(options);
                      }
                      this._initProgressListener(options);
                  }
                  if (options.postMessage) {
                      // Setting the dataType to postmessage enables the
                      // postMessage transport:
                      options.dataType = 'postmessage ' + (options.dataType || '');
                  }
              } else {

                  this._initIframeSettings(options);

              }
          },

          _getParamName: function (options) {
              var fileInput = $(options.fileInput),
                  paramName = options.paramName;
              if (!paramName) {
                  paramName = [];
                  fileInput.each(function () {
                      var input = $(this),
                          name = input.prop('name') || 'files[]',
                          i = (input.prop('files') || [1]).length;
                      while (i) {
                          paramName.push(name);
                          i -= 1;
                      }
                  });
                  if (!paramName.length) {
                      paramName = [fileInput.prop('name') || 'files[]'];
                  }
              } else if (!$.isArray(paramName)) {
                  paramName = [paramName];
              }
              return paramName;
          },

          _initFormSettings: function (options) {
              // Retrieve missing options from the input field and the
              // associated form, if available:
              if (!options.form || !options.form.length) {
                  options.form = $(options.fileInput.prop('form'));

                  // If the given file input doesn't have an associated form,
                  // use the default widget file input's form:
                  if (!options.form.length) {
                      options.form = $(this.options.fileInput.prop('form'));
                  }

              }

              options.paramName = this._getParamName(options);

              if (!options.url) {
                  options.url = options.form.prop('action') || location.href;
              }
              // The HTTP request method must be "POST" or "PUT":
              options.type = (options.type || options.form.prop('method') || '')
                  .toUpperCase();

              if (options.type !== 'POST' && options.type !== 'PUT' &&
                      options.type !== 'PATCH') {

                  options.type = 'POST';
              }

              if (!options.formAcceptCharset) {
                  options.formAcceptCharset = options.form.attr('accept-charset');
              }

          },
  
          _getAJAXSettings: function (data) {
              var options = $.extend({}, this.options, data);
              this._initFormSettings(options);
              this._initDataSettings(options);
              return options;
          },

          // jQuery 1.6 doesn't provide .state(),
          // while jQuery 1.8+ removed .isRejected() and .isResolved():
          _getDeferredState: function (deferred) {
              if (deferred.state) {
                  return deferred.state();
              }
              if (deferred.isResolved()) {
                  return 'resolved';
              }
              if (deferred.isRejected()) {
                  return 'rejected';
              }
              return 'pending';
          },

          // Maps jqXHR callbacks to the equivalent
          // methods of the given Promise object:
          _enhancePromise: function (promise) {
              promise.success = promise.done;
              promise.error = promise.fail;
              promise.complete = promise.always;
              return promise;
          },
  
          // Creates and returns a Promise object enhanced with
          // the jqXHR methods abort, success, error and complete:
          _getXHRPromise: function (resolveOrReject, context, args) {
              var dfd = $.Deferred(),
                  promise = dfd.promise();
              context = context || this.options.context || promise;
              if (resolveOrReject === true) {
                  dfd.resolveWith(context, args);
              } else if (resolveOrReject === false) {
                  dfd.rejectWith(context, args);
              }
              promise.abort = dfd.promise;
              return this._enhancePromise(promise);
          },

          // Adds convenience methods to the data callback argument:
          _addConvenienceMethods: function (e, data) {
              var that = this,
                  getPromise = function (data) {
                      return $.Deferred().resolveWith(that, [data]).promise();
                  };
              data.process = function (resolveFunc, rejectFunc) {
                  if (resolveFunc || rejectFunc) {
                      data._processQueue = this._processQueue =
                          (this._processQueue || getPromise(this))
                              .pipe(resolveFunc, rejectFunc);
                  }
                  return this._processQueue || getPromise(this);
              };
              data.submit = function () {
                  if (this.state() !== 'pending') {
                      data.jqXHR = this.jqXHR =
                          (that._trigger('submit', e, this) !== false) &&
                          that._onSend(e, this);
                  }
                  return this.jqXHR || that._getXHRPromise();
              };
              data.abort = function () {
                  if (this.jqXHR) {
                      return this.jqXHR.abort();
                  }
                  return that._getXHRPromise();
              };
              data.state = function () {
                  if (this.jqXHR) {
                      return that._getDeferredState(this.jqXHR);
                  }
                  if (this._processQueue) {
                      return that._getDeferredState(this._processQueue);
                  }
              };
              data.progress = function () {
                  return this._progress;
              };
              data.response = function () {
                  return this._response;
              };
          },
  
          // Parses the Range header from the server response
          // and returns the uploaded bytes:
          _getUploadedBytes: function (jqXHR) {
              var range = jqXHR.getResponseHeader('Range'),
                  parts = range && range.split('-'),
                  upperBytesPos = parts && parts.length > 1 &&
                      parseInt(parts[1], 10);
              return upperBytesPos && upperBytesPos + 1;
          },

          // Uploads a file in multiple, sequential requests
          // by splitting the file up in multiple blob chunks.
          // If the second parameter is true, only tests if the file
          // should be uploaded in chunks, but does not invoke any
          // upload requests:
          _chunkedUpload: function (options, testOnly) {

              options.uploadedBytes = options.uploadedBytes || 0;

              var that = this,
                  file = options.files[0],
                  fs = file.size,

                  ub = options.uploadedBytes,

                  mcs = options.maxChunkSize || fs,

                  slice = this._blobSlice,
                  dfd = $.Deferred(),
                  promise = dfd.promise(),

                  jqXHR,

                  upload;

              if (!(this._isXHRUpload(options) && slice && (ub || mcs < fs)) ||
                      options.data) {
                  return false;
              }
              if (testOnly) {
                  return true;
              }
              if (ub >= fs) {

                  file.error = options.i18n('uploadedBytes');

                  return this._getXHRPromise(
                      false,
                      options.context,
                      [null, 'error', file.error]
                  );
              }

              // The chunk upload method:
              upload = function () {
                  // Clone the options object for each chunk upload:
                  var o = $.extend({}, options),
                      currentLoaded = o._progress.loaded;
                  o.blob = slice.call(
                      file,
                      ub,
                      ub + mcs,
                      file.type
                  );
                  // Store the current chunk size, as the blob itself
                  // will be dereferenced after data processing:
                  o.chunkSize = o.blob.size;
                  // Expose the chunk bytes position range:
                  o.contentRange = 'bytes ' + ub + '-' +
                      (ub + o.chunkSize - 1) + '/' + fs;
                  // Process the upload data (the blob and potential form data):
                  that._initXHRData(o);
                  // Add progress listeners for this chunk upload:
                  that._initProgressListener(o);
                  jqXHR = ((that._trigger('chunksend', null, o) !== false && $.ajax(o)) ||
                          that._getXHRPromise(false, o.context))
                      .done(function (result, textStatus, jqXHR) {
                          ub = that._getUploadedBytes(jqXHR) ||
                              (ub + o.chunkSize);
                          // Create a progress event if no final progress event
                          // with loaded equaling total has been triggered
                          // for this chunk:
                          if (currentLoaded + o.chunkSize - o._progress.loaded) {
                              that._onProgress($.Event('progress', {
                                  lengthComputable: true,
                                  loaded: ub - o.uploadedBytes,
                                  total: ub - o.uploadedBytes
                              }), o);
                          }
                          options.uploadedBytes = o.uploadedBytes = ub;
                          o.result = result;
                          o.textStatus = textStatus;
                          o.jqXHR = jqXHR;
                          that._trigger('chunkdone', null, o);
                          that._trigger('chunkalways', null, o);
                          if (ub < fs) {
                              // File upload not yet complete,
                              // continue with the next chunk:
                              upload();
                          } else {
                              dfd.resolveWith(
                                  o.context,
                                  [result, textStatus, jqXHR]
                              );
                          }
                      })
                      .fail(function (jqXHR, textStatus, errorThrown) {
                          o.jqXHR = jqXHR;
                          o.textStatus = textStatus;
                          o.errorThrown = errorThrown;
                          that._trigger('chunkfail', null, o);
                          that._trigger('chunkalways', null, o);
                          dfd.rejectWith(
                              o.context,
                              [jqXHR, textStatus, errorThrown]
                          );
                      });

              };

              this._enhancePromise(promise);
              promise.abort = function () {

                  return jqXHR.abort();
              };

              upload();
              return promise;

          },
  
          _beforeSend: function (e, data) {
              if (this._active === 0) {
                  // the start callback is triggered when an upload starts
                  // and no other uploads are currently running,
                  // equivalent to the global ajaxStart event:
                  this._trigger('start');

                  // Set timer for global bitrate progress calculation:
                  this._bitrateTimer = new this._BitrateTimer();
                  // Reset the global progress values:
                  this._progress.loaded = this._progress.total = 0;
                  this._progress.bitrate = 0;

              }

              // Make sure the container objects for the .response() and
              // .progress() methods on the data object are available
              // and reset to their initial state:
              this._initResponseObject(data);
              this._initProgressObject(data);
              data._progress.loaded = data.loaded = data.uploadedBytes || 0;
              data._progress.total = data.total = this._getTotal(data.files) || 1;
              data._progress.bitrate = data.bitrate = 0;

              this._active += 1;
              // Initialize the global progress values:

              this._progress.loaded += data.loaded;
              this._progress.total += data.total;

          },
  
          _onDone: function (result, textStatus, jqXHR, options) {

              var total = options._progress.total,
                  response = options._response;
              if (options._progress.loaded < total) {
                  // Create a progress event if no final progress event
                  // with loaded equaling total has been triggered:

                  this._onProgress($.Event('progress', {
                      lengthComputable: true,

                      loaded: total,
                      total: total

                  }), options);
              }

              response.result = options.result = result;
              response.textStatus = options.textStatus = textStatus;
              response.jqXHR = options.jqXHR = jqXHR;

              this._trigger('done', null, options);
          },
  
          _onFail: function (jqXHR, textStatus, errorThrown, options) {

              var response = options._response;

              if (options.recalculateProgress) {
                  // Remove the failed (error or abort) file upload from
                  // the global progress calculation:

                  this._progress.loaded -= options._progress.loaded;
                  this._progress.total -= options._progress.total;

              }

              response.jqXHR = options.jqXHR = jqXHR;
              response.textStatus = options.textStatus = textStatus;
              response.errorThrown = options.errorThrown = errorThrown;
              this._trigger('fail', null, options);

          },
  
          _onAlways: function (jqXHRorResult, textStatus, jqXHRorError, options) {

              // jqXHRorResult, textStatus and jqXHRorError are added to the
              // options object via done and fail callbacks

              this._trigger('always', null, options);

          },
  
          _onSend: function (e, data) {

              if (!data.submit) {
                  this._addConvenienceMethods(e, data);
              }

              var that = this,
                  jqXHR,

                  aborted,

                  slot,
                  pipe,
                  options = that._getAJAXSettings(data),

                  send = function () {

                      that._sending += 1;

                      // Set timer for bitrate progress calculation:
                      options._bitrateTimer = new that._BitrateTimer();

                      jqXHR = jqXHR || (

                          ((aborted || that._trigger('send', e, options) === false) &&
                          that._getXHRPromise(false, options.context, aborted)) ||
                          that._chunkedUpload(options) || $.ajax(options)

                      ).done(function (result, textStatus, jqXHR) {
                          that._onDone(result, textStatus, jqXHR, options);
                      }).fail(function (jqXHR, textStatus, errorThrown) {
                          that._onFail(jqXHR, textStatus, errorThrown, options);
                      }).always(function (jqXHRorResult, textStatus, jqXHRorError) {

                          that._onAlways(
                              jqXHRorResult,
                              textStatus,
                              jqXHRorError,
                              options
                          );

                          that._sending -= 1;
                          that._active -= 1;

                          if (options.limitConcurrentUploads &&
                                  options.limitConcurrentUploads > that._sending) {
                              // Start the next queued upload,
                              // that has not been aborted:
                              var nextSlot = that._slots.shift();
                              while (nextSlot) {

                                  if (that._getDeferredState(nextSlot) === 'pending') {

                                      nextSlot.resolve();
                                      break;
                                  }
                                  nextSlot = that._slots.shift();
                              }
                          }

                          if (that._active === 0) {
                              // The stop callback is triggered when all uploads have
                              // been completed, equivalent to the global ajaxStop event:
                              that._trigger('stop');
                          }

                      });
                      return jqXHR;
                  };
              this._beforeSend(e, options);
              if (this.options.sequentialUploads ||
                      (this.options.limitConcurrentUploads &&
                      this.options.limitConcurrentUploads <= this._sending)) {
                  if (this.options.limitConcurrentUploads > 1) {
                      slot = $.Deferred();
                      this._slots.push(slot);
                      pipe = slot.pipe(send);
                  } else {

                      this._sequence = this._sequence.pipe(send, send);
                      pipe = this._sequence;

                  }
                  // Return the piped Promise object, enhanced with an abort method,
                  // which is delegated to the jqXHR object of the current upload,
                  // and jqXHR callbacks mapped to the equivalent Promise methods:
                  pipe.abort = function () {

                      aborted = [undefined, 'abort', 'abort'];

                      if (!jqXHR) {
                          if (slot) {

                              slot.rejectWith(options.context, aborted);

                          }

                          return send();

                      }
                      return jqXHR.abort();
                  };
                  return this._enhancePromise(pipe);
              }
              return send();
          },
  
          _onAdd: function (e, data) {
              var that = this,
                  result = true,
                  options = $.extend({}, this.options, data),
                  limit = options.limitMultiFileUploads,

                  paramName = this._getParamName(options),
                  paramNameSet,
                  paramNameSlice,

                  fileSet,
                  i;
              if (!(options.singleFileUploads || limit) ||
                      !this._isXHRUpload(options)) {
                  fileSet = [data.files];

                  paramNameSet = [paramName];

              } else if (!options.singleFileUploads && limit) {
                  fileSet = [];

                  paramNameSet = [];

                  for (i = 0; i < data.files.length; i += limit) {
                      fileSet.push(data.files.slice(i, i + limit));

                      paramNameSlice = paramName.slice(i, i + limit);
                      if (!paramNameSlice.length) {
                          paramNameSlice = paramName;
                      }
                      paramNameSet.push(paramNameSlice);

                  }

              } else {
                  paramNameSet = paramName;

              }
              data.originalFiles = data.files;
              $.each(fileSet || data.files, function (index, element) {

                  var newData = $.extend({}, data);
                  newData.files = fileSet ? element : [element];
                  newData.paramName = paramNameSet[index];
                  that._initResponseObject(newData);
                  that._initProgressObject(newData);
                  that._addConvenienceMethods(e, newData);
                  result = that._trigger('add', e, newData);
                  return result;

              });
              return result;
          },

          _replaceFileInput: function (input) {
              var inputClone = input.clone(true);
              $('<form></form>').append(inputClone)[0].reset();
              // Detaching allows to insert the fileInput on another form
              // without loosing the file input value:
              input.after(inputClone).detach();
              // Avoid memory leaks with the detached file input:
              $.cleanData(input.unbind('remove'));
              // Replace the original file input element in the fileInput

              // elements set with the clone, which has been copied including

              // event handlers:
              this.options.fileInput = this.options.fileInput.map(function (i, el) {
                  if (el === input[0]) {
                      return inputClone[0];
                  }
                  return el;
              });
              // If the widget has been initialized on the file input itself,
              // override this.element with the file input clone:
              if (input[0] === this.element[0]) {
                  this.element = inputClone;
              }
          },

          _handleFileTreeEntry: function (entry, path) {
              var that = this,
                  dfd = $.Deferred(),
                  errorHandler = function (e) {
                      if (e && !e.entry) {
                          e.entry = entry;
                      }
                      // Since $.when returns immediately if one
                      // Deferred is rejected, we use resolve instead.
                      // This allows valid files and invalid items
                      // to be returned together in one set:
                      dfd.resolve([e]);
                  },
                  dirReader;
              path = path || '';
              if (entry.isFile) {
                  if (entry._file) {
                      // Workaround for Chrome bug #149735
                      entry._file.relativePath = path;
                      dfd.resolve(entry._file);
                  } else {
                      entry.file(function (file) {
                          file.relativePath = path;
                          dfd.resolve(file);
                      }, errorHandler);
                  }
              } else if (entry.isDirectory) {
                  dirReader = entry.createReader();
                  dirReader.readEntries(function (entries) {
                      that._handleFileTreeEntries(
                          entries,
                          path + entry.name + '/'
                      ).done(function (files) {
                          dfd.resolve(files);
                      }).fail(errorHandler);
                  }, errorHandler);
              } else {
                  // Return an empy list for file system items
                  // other than files or directories:
                  dfd.resolve([]);
              }
              return dfd.promise();
          },
  
          _handleFileTreeEntries: function (entries, path) {
              var that = this;
              return $.when.apply(
                  $,
                  $.map(entries, function (entry) {
                      return that._handleFileTreeEntry(entry, path);
                  })
              ).pipe(function () {
                  return Array.prototype.concat.apply(
                      [],
                      arguments
                  );
              });
          },
  
          _getDroppedFiles: function (dataTransfer) {
              dataTransfer = dataTransfer || {};
              var items = dataTransfer.items;
              if (items && items.length && (items[0].webkitGetAsEntry ||
                      items[0].getAsEntry)) {
                  return this._handleFileTreeEntries(
                      $.map(items, function (item) {
                          var entry;
                          if (item.webkitGetAsEntry) {
                              entry = item.webkitGetAsEntry();
                              if (entry) {
                                  // Workaround for Chrome bug #149735:
                                  entry._file = item.getAsFile();
                              }
                              return entry;
                          }
                          return item.getAsEntry();
                      })
                  );
              }
              return $.Deferred().resolve(
                  $.makeArray(dataTransfer.files)
              ).promise();
          },
  
          _getSingleFileInputFiles: function (fileInput) {
              fileInput = $(fileInput);
              var entries = fileInput.prop('webkitEntries') ||
                      fileInput.prop('entries'),
                  files,
                  value;
              if (entries && entries.length) {
                  return this._handleFileTreeEntries(entries);
              }
              files = $.makeArray(fileInput.prop('files'));
              if (!files.length) {
                  value = fileInput.prop('value');
                  if (!value) {
                      return $.Deferred().resolve([]).promise();
                  }

                  // If the files property is not available, the browser does not
                  // support the File API and we add a pseudo File object with
                  // the input value as name with path information removed:

                  files = [{name: value.replace(/^.*\\/, '')}];
              } else if (files[0].name === undefined && files[0].fileName) {
                  // File normalization for Safari 4 and Firefox 3:
                  $.each(files, function (index, file) {
                      file.name = file.fileName;
                      file.size = file.fileSize;
                  });

              }

              return $.Deferred().resolve(files).promise();
          },
  
          _getFileInputFiles: function (fileInput) {
              if (!(fileInput instanceof $) || fileInput.length === 1) {
                  return this._getSingleFileInputFiles(fileInput);

              }

              return $.when.apply(
                  $,
                  $.map(fileInput, this._getSingleFileInputFiles)
              ).pipe(function () {
                  return Array.prototype.concat.apply(
                      [],
                      arguments
                  );
              });
          },
  
          _onChange: function (e) {
              var that = this,
                  data = {
                      fileInput: $(e.target),
                      form: $(e.target.form)
                  };
              this._getFileInputFiles(data.fileInput).always(function (files) {
                  data.files = files;
                  if (that.options.replaceFileInput) {
                      that._replaceFileInput(data.fileInput);
                  }
                  if (that._trigger('change', e, data) !== false) {
                      that._onAdd(e, data);
                  }
              });

          },
  
          _onPaste: function (e) {

              var items = e.originalEvent && e.originalEvent.clipboardData &&
                      e.originalEvent.clipboardData.items,

                  data = {files: []};

              if (items && items.length) {
                  $.each(items, function (index, item) {
                      var file = item.getAsFile && item.getAsFile();
                      if (file) {
                          data.files.push(file);
                      }
                  });
                  if (this._trigger('paste', e, data) === false ||
                          this._onAdd(e, data) === false) {
                      return false;

                  }

              }
          },
  
          _onDrop: function (e) {

              e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
              var that = this,
                  dataTransfer = e.dataTransfer,
                  data = {};
              if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
                  e.preventDefault();
                  this._getDroppedFiles(dataTransfer).always(function (files) {
                      data.files = files;
                      if (that._trigger('drop', e, data) !== false) {
                          that._onAdd(e, data);
                      }
                  });

              }

          },
  
          _onDragOver: function (e) {

              e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
              var dataTransfer = e.dataTransfer;

              if (dataTransfer) {

                  if (this._trigger('dragover', e) === false) {
                      return false;
                  }
                  if ($.inArray('Files', dataTransfer.types) !== -1) {
                      dataTransfer.dropEffect = 'copy';
                      e.preventDefault();
                  }

              }

          },
  
          _initEventHandlers: function () {

              if (this._isXHRUpload(this.options)) {

                  this._on(this.options.dropZone, {
                      dragover: this._onDragOver,
                      drop: this._onDrop
                  });
                  this._on(this.options.pasteZone, {
                      paste: this._onPaste
                  });
              }
              if ($.support.fileInput) {
                  this._on(this.options.fileInput, {
                      change: this._onChange
                  });

              }

          },
  
          _destroyEventHandlers: function () {

              this._off(this.options.dropZone, 'dragover drop');
              this._off(this.options.pasteZone, 'paste');
              this._off(this.options.fileInput, 'change');

          },
  
          _setOption: function (key, value) {

              var reinit = $.inArray(key, this._specialOptions) !== -1;
              if (reinit) {

                  this._destroyEventHandlers();
              }

              this._super(key, value);
              if (reinit) {

                  this._initSpecialOptions();
                  this._initEventHandlers();
              }
          },
  
          _initSpecialOptions: function () {
              var options = this.options;
              if (options.fileInput === undefined) {

                  options.fileInput = this.element.is('input[type="file"]') ?
                          this.element : this.element.find('input[type="file"]');

              } else if (!(options.fileInput instanceof $)) {
                  options.fileInput = $(options.fileInput);
              }
              if (!(options.dropZone instanceof $)) {
                  options.dropZone = $(options.dropZone);
              }

              if (!(options.pasteZone instanceof $)) {
                  options.pasteZone = $(options.pasteZone);
              }
          },
  
          _getRegExp: function (str) {
              var parts = str.split('/'),
                  modifiers = parts.pop();
              parts.shift();
              return new RegExp(parts.join('/'), modifiers);
          },
  
          _isRegExpOption: function (key, value) {
              return key !== 'url' && $.type(value) === 'string' &&
                  /^\/.*\/[igm]{0,3}$/.test(value);
          },
  
          _initDataAttributes: function () {
              var that = this,
                  options = this.options;
              // Initialize options set via HTML5 data-attributes:
              $.each(
                  $(this.element[0].cloneNode(false)).data(),
                  function (key, value) {
                      if (that._isRegExpOption(key, value)) {
                          value = that._getRegExp(value);
                      }
                      options[key] = value;
                  }
              );

          },
  
          _create: function () {

              this._initDataAttributes();

              this._initSpecialOptions();
              this._slots = [];
              this._sequence = this._getXHRPromise(true);

              this._sending = this._active = 0;
              this._initProgressObject(this);

              this._initEventHandlers();
          },

          // This method is exposed to the widget API and allows to query
          // the number of active uploads:
          active: function () {
              return this._active;

          },

          // This method is exposed to the widget API and allows to query
          // the widget upload progress.
          // It returns an object with loaded, total and bitrate properties
          // for the running uploads:
          progress: function () {
              return this._progress;

          },
  
          // This method is exposed to the widget API and allows adding files
          // using the fileupload API. The data parameter accepts an object which
          // must have a files property and can contain additional options:
          // .fileupload('add', {files: filesList});
          add: function (data) {

              var that = this;

              if (!data || this.options.disabled) {
                  return;
              }

              if (data.fileInput && !data.files) {
                  this._getFileInputFiles(data.fileInput).always(function (files) {
                      data.files = files;
                      that._onAdd(null, data);
                  });
              } else {
                  data.files = $.makeArray(data.files);
                  this._onAdd(null, data);
              }

          },
  
          // This method is exposed to the widget API and allows sending files
          // using the fileupload API. The data parameter accepts an object which

          // must have a files or fileInput property and can contain additional options:

          // .fileupload('send', {files: filesList});
          // The method returns a Promise object for the file upload call.
          send: function (data) {
              if (data && !this.options.disabled) {

                  if (data.fileInput && !data.files) {
                      var that = this,
                          dfd = $.Deferred(),
                          promise = dfd.promise(),
                          jqXHR,
                          aborted;
                      promise.abort = function () {
                          aborted = true;
                          if (jqXHR) {
                              return jqXHR.abort();
                          }
                          dfd.reject(null, 'abort', 'abort');
                          return promise;
                      };
                      this._getFileInputFiles(data.fileInput).always(
                          function (files) {
                              if (aborted) {
                                  return;
                              }
                              if (!files.length) {
                                  dfd.reject();
                                  return;
                              }
                              data.files = files;
                              jqXHR = that._onSend(null, data).then(
                                  function (result, textStatus, jqXHR) {
                                      dfd.resolve(result, textStatus, jqXHR);
                                  },
                                  function (jqXHR, textStatus, errorThrown) {
                                      dfd.reject(jqXHR, textStatus, errorThrown);
                                  }
                              );
                          }
                      );
                      return this._enhancePromise(promise);
                  }
                  data.files = $.makeArray(data.files);

                  if (data.files.length) {
                      return this._onSend(null, data);
                  }
              }
              return this._getXHRPromise(false, data && data.context);
          }
  
      });

  }));