scala-news-reader

jquery.fileupload.js

(56490B)

 /*
  * jQuery File Upload Plugin 5.31.6
  * 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';
 
     // 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
                 });
             }
             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;
                             }
                             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);
         }
 
     });
 
 }));