Subversion-Projekte lars-tiefland.cienc

/*

 * jQuery File Upload Plugin 5.2

 * https://github.com/blueimp/jQuery-File-Upload

 *

 * Copyright 2010, Sebastian Tschan

 * https://blueimp.net

 *

 * Licensed under the MIT license:

 * http://creativecommons.org/licenses/MIT/

 */

/*jslint nomen: true, unparam: true, regexp: true */

/*global document, XMLHttpRequestUpload, Blob, File, FormData, location, jQuery */

(function ($) {

    'use strict';

    // The fileupload widget listens for change events on file input fields

    // defined via fileInput setting and 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, 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 namespace used for event handler binding on the dropZone and

            // fileInput collections.

            // If not set, the name of the widget ("fileupload") is used.

            namespace: undefined,

            // The drop target collection, by the default the complete document.

            // Set to null or an empty collection to disable drag & drop support:

            dropZone: $(document),

            // The file input field collection, that is listened for change events.

            // If undefined, it is set to the file input fields inside

            // of the widget element on plugin initialization.

            // Set to null or an empty collection 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:

            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,

            // 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,

            // 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 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 uplaods, 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 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) {

                data.submit();

            },

            // Other callbacks:

            // 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 collection:

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

            // Callback for drop events of the dropZone collection:

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

            // Callback for dragover events of the dropZone collection:

            // dragover: function (e) {}, // .bind('fileuploaddragover', 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 a refresh after assigning a new value:

        _refreshOptionsList: ['namespace', 'dropZone', 'fileInput'],

        _isXHRUpload: function (options) {

            var undef = 'undefined';

            return !options.forceIframeTransport &&

                typeof XMLHttpRequestUpload !== undef && typeof File !== undef &&

                (!options.multipart || typeof FormData !== undef);

        },

        _getFormData: function (options) {

            var formData;

            if (typeof options.formData === 'function') {

                return options.formData(options.form);

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

                return options.formData;

            } else if (options.formData) {

                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;

        },

        _onProgress: function (e, data) {

            if (e.lengthComputable) {

                var total = data.total || this._getTotal(data.files),

                    loaded = parseInt(

                        e.loaded / e.total * (data.chunkSize || total),

                        10

                    ) + (data.uploadedBytes || 0);

                this._loaded += loaded - (data.loaded || data.uploadedBytes || 0);

                data.lengthComputable = true;

                data.loaded = loaded;

                data.total = total;

                // 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, {

                    lengthComputable: true,

                    loaded: this._loaded,

                    total: this._total

                });

            }

        },

        _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.addEventListener) {

                xhr.upload.addEventListener('progress', function (e) {

                    that._onProgress(e, options);

                }, false);

                options.xhr = function () {

                    return xhr;

                };

            }

        },

        _initXHRData: function (options) {

            var formData,

                file = options.files[0];

            if (!options.multipart || options.blob) {

                // For non-multipart uploads and chunked uploads,

                // file meta data is not part of the request body,

                // so we transmit this data as part of the HTTP headers.

                // For cross domain requests, these headers must be allowed

                // via Access-Control-Allow-Headers or removed using

                // the beforeSend callback:

                options.headers = $.extend(options.headers, {

                    'X-File-Name': file.name,

                    'X-File-Type': file.type,

                    'X-File-Size': file.size

                });

                if (!options.blob) {

                    // Non-chunked non-multipart upload:

                    options.contentType = file.type;

                    options.data = file;

                } else if (!options.multipart) {

                    // Chunked non-multipart upload:

                    options.contentType = 'application/octet-stream';

                    options.data = options.blob;

                }

            }

            if (options.multipart && typeof FormData !== 'undefined') {

                if (options.formData instanceof 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(options.paramName, options.blob);

                } else {

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

                        // File objects are also Blob instances.

                        // This check allows the tests to run with

                        // dummy objects:

                        if (file instanceof Blob) {

                            formData.append(options.paramName, file);

                        }

                    });

                }

                options.data = formData;

            }

            // Blob reference is not needed anymore, free memory:

            options.blob = null;

        },

        _initIframeSettings: function (options) {

            // 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);

        },

        _initDataSettings: function (options) {

            if (this._isXHRUpload(options)) {

                if (!this._chunkedUpload(options, true)) {

                    if (!options.data) {

                        this._initXHRData(options);

                    }

                    this._initProgressListener(options);

                }

            } else {

                this._initIframeSettings(options);

            }

        },

        _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 (!options.paramName) {

                options.paramName = options.fileInput.prop('name') ||

                    'files[]';

            }

            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 = 'POST';

            }

        },

        _getAJAXSettings: function (data) {

            var options = $.extend({}, this.options, data);

            this._initFormSettings(options);

            this._initDataSettings(options);

            return options;

        },

        // 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);

        },

        // 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) {

            var that = this,

                file = options.files[0],

                fs = file.size,

                ub = options.uploadedBytes = options.uploadedBytes || 0,

                mcs = options.maxChunkSize || fs,

                // Use the Blob methods with the slice implementation

                // according to the W3C Blob API specification:

                slice = file.webkitSlice || file.mozSlice || file.slice,

                upload,

                n,

                jqXHR,

                pipe;

            if (!(this._isXHRUpload(options) && slice && (ub || mcs < fs)) ||

                    options.data) {

                return false;

            }

            if (testOnly) {

                return true;

            }

            if (ub >= fs) {

                file.error = 'uploadedBytes';

                return this._getXHRPromise(false);

            }

            // n is the number of blobs to upload,

            // calculated via filesize, uploaded bytes and max chunk size:

            n = Math.ceil((fs - ub) / mcs);

            // The chunk upload method accepting the chunk number as parameter:

            upload = function (i) {

                if (!i) {

                    return that._getXHRPromise(true);

                }

                // Upload the blobs in sequential order:

                return upload(i -= 1).pipe(function () {

                    // Clone the options object for each chunk upload:

                    var o = $.extend({}, options);

                    o.blob = slice.call(

                        file,

                        ub + i * mcs,

                        ub + (i + 1) * mcs

                    );

                    // Store the current chunk size, as the blob itself

                    // will be dereferenced after data processing:

                    o.chunkSize = o.blob.size;

                    // Process the upload data (the blob and potential form data):

                    that._initXHRData(o);

                    // Add progress listeners for this chunk upload:

                    that._initProgressListener(o);

                    jqXHR = ($.ajax(o) || that._getXHRPromise(false, o.context))

                        .done(function () {

                            // Create a progress event if upload is done and

                            // no progress event has been invoked for this chunk:

                            if (!o.loaded) {

                                that._onProgress($.Event('progress', {

                                    lengthComputable: true,

                                    loaded: o.chunkSize,

                                    total: o.chunkSize

                                }), o);

                            }

                            options.uploadedBytes = o.uploadedBytes

                                += o.chunkSize;

                        });

                    return jqXHR;

                });

            };

            // 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 = upload(n);

            pipe.abort = function () {

                return jqXHR.abort();

            };

            return this._enhancePromise(pipe);

        },

        _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');

            }

            this._active += 1;

            // Initialize the global progress values:

            this._loaded += data.uploadedBytes || 0;

            this._total += this._getTotal(data.files);

        },

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

            if (!this._isXHRUpload(options)) {

                // Create a progress event for each iframe load:

                this._onProgress($.Event('progress', {

                    lengthComputable: true,

                    loaded: 1,

                    total: 1

                }), options);

            }

            options.result = result;

            options.textStatus = textStatus;

            options.jqXHR = jqXHR;

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

        },

        _onFail: function (jqXHR, textStatus, errorThrown, options) {

            options.jqXHR = jqXHR;

            options.textStatus = textStatus;

            options.errorThrown = errorThrown;

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

            if (options.recalculateProgress) {

                // Remove the failed (error or abort) file upload from

                // the global progress calculation:

                this._loaded -= options.loaded || options.uploadedBytes || 0;

                this._total -= options.total || this._getTotal(options.files);

            }

        },

        _onAlways: function (result, textStatus, jqXHR, errorThrown, options) {

            this._active -= 1;

            options.result = result;

            options.textStatus = textStatus;

            options.jqXHR = jqXHR;

            options.errorThrown = errorThrown;

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

            if (this._active === 0) {

                // The stop callback is triggered when all uploads have

                // been completed, equivalent to the global ajaxStop event:

                this._trigger('stop');

                // Reset the global progress values:

                this._loaded = this._total = 0;

            }

        },

        _onSend: function (e, data) {

            var that = this,

                jqXHR,

                slot,

                pipe,

                options = that._getAJAXSettings(data),

                send = function (resolve, args) {

                    that._sending += 1;

                    jqXHR = jqXHR || (

                        (resolve !== false &&

                        that._trigger('send', e, options) !== false &&

                        (that._chunkedUpload(options) || $.ajax(options))) ||

                        that._getXHRPromise(false, options.context, args)

                    ).done(function (result, textStatus, jqXHR) {

                        that._onDone(result, textStatus, jqXHR, options);

                    }).fail(function (jqXHR, textStatus, errorThrown) {

                        that._onFail(jqXHR, textStatus, errorThrown, options);

                    }).always(function (a1, a2, a3) {

                        that._sending -= 1;

                        if (a3 && a3.done) {

                            that._onAlways(a1, a2, a3, undefined, options);

                        } else {

                            that._onAlways(undefined, a2, a1, a3, options);

                        }

                        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 (!nextSlot.isRejected()) {

                                    nextSlot.resolve();

                                    break;

                                }

                                nextSlot = that._slots.shift();

                            }

                        }

                    });

                    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 {

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

                }

                // 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 () {

                    var args = [undefined, 'abort', 'abort'];

                    if (!jqXHR) {

                        if (slot) {

                            slot.rejectWith(args);

                        }

                        return send(false, args);

                    }

                    return jqXHR.abort();

                };

                return this._enhancePromise(pipe);

            }

            return send();

        },

        _onAdd: function (e, data) {

            var that = this,

                result = true,

                options = $.extend({}, this.options, data),

                fileSet = data.files,

                limit = options.limitMultiFileUploads,

                i;

            if (!(options.singleFileUploads || limit) ||

                    !this._isXHRUpload(options)) {

                fileSet = [fileSet];

            } else if (!options.singleFileUploads && limit) {

                fileSet = [];

                for (i = 0; i < data.files.length; i += limit) {

                    fileSet.push(data.files.slice(i, i + limit));

                }

            }

            $.each(fileSet, function (index, file) {

                var files = $.isArray(file) ? file : [file],

                    newData = $.extend({}, data, {files: files});

                newData.submit = function () {

                    return that._onSend(e, newData);

                };

                return (result = that._trigger('add', e, newData));

            });

            return result;

        },

        // File Normalization for Gecko 1.9.1 (Firefox 3.5) support:

        _normalizeFile: function (index, file) {

            if (file.name === undefined && file.size === undefined) {

                file.name = file.fileName;

                file.size = file.fileSize;

            }

        },

        _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();

            // Replace the original file input element in the fileInput

            // collection 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;

            });

        },

        _onChange: function (e) {

            var that = e.data.fileupload,

                data = {

                    files: $.each($.makeArray(e.target.files), that._normalizeFile),

                    fileInput: $(e.target),

                    form: $(e.target.form)

                };

            if (!data.files.length) {

                // 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:

                data.files = [{name: e.target.value.replace(/^.*\\/, '')}];

            }

            // Store the form reference as jQuery data for other event handlers,

            // as the form property is not available after replacing the file input:

            if (data.form.length) {

                data.fileInput.data('blueimp.fileupload.form', data.form);

            } else {

                data.form = data.fileInput.data('blueimp.fileupload.form');

            }

            if (that.options.replaceFileInput) {

                that._replaceFileInput(data.fileInput);

            }

            if (that._trigger('change', e, data) === false ||

                    that._onAdd(e, data) === false) {

                return false;

            }

        },

        _onDrop: function (e) {

            var that = e.data.fileupload,

                dataTransfer = e.dataTransfer = e.originalEvent.dataTransfer,

                data = {

                    files: $.each(

                        $.makeArray(dataTransfer && dataTransfer.files),

                        that._normalizeFile

                    )

                };

            if (that._trigger('drop', e, data) === false ||

                    that._onAdd(e, data) === false) {

                return false;

            }

            e.preventDefault();

        },

        _onDragOver: function (e) {

            var that = e.data.fileupload,

                dataTransfer = e.dataTransfer = e.originalEvent.dataTransfer;

            if (that._trigger('dragover', e) === false) {

                return false;

            }

            if (dataTransfer) {

                dataTransfer.dropEffect = dataTransfer.effectAllowed = 'copy';

            }

            e.preventDefault();

        },

        _initEventHandlers: function () {

            var ns = this.options.namespace || this.name;

            this.options.dropZone

                .bind('dragover.' + ns, {fileupload: this}, this._onDragOver)

                .bind('drop.' + ns, {fileupload: this}, this._onDrop);

            this.options.fileInput

                .bind('change.' + ns, {fileupload: this}, this._onChange);

        },

        _destroyEventHandlers: function () {

            var ns = this.options.namespace || this.name;

            this.options.dropZone

                .unbind('dragover.' + ns, this._onDragOver)

                .unbind('drop.' + ns, this._onDrop);

            this.options.fileInput

                .unbind('change.' + ns, this._onChange);

        },

        _beforeSetOption: function (key, value) {

            this._destroyEventHandlers();

        },

        _afterSetOption: function (key, value) {

            var options = this.options;

            if (!options.fileInput) {

                options.fileInput = $();

            }

            if (!options.dropZone) {

                options.dropZone = $();

            }

            this._initEventHandlers();

        },

        _setOption: function (key, value) {

            var refresh = $.inArray(key, this._refreshOptionsList) !== -1;

            if (refresh) {

                this._beforeSetOption(key, value);

            }

            $.Widget.prototype._setOption.call(this, key, value);

            if (refresh) {

                this._afterSetOption(key, value);

            }

        },

        _create: function () {

            var options = this.options;

            if (options.fileInput === undefined) {

                options.fileInput = this.element.is('input:file') ?

                    this.element : this.element.find('input:file');

            } else if (!options.fileInput) {

                options.fileInput = $();

            }

            if (!options.dropZone) {

                options.dropZone = $();

            }

            this._slots = [];

            this._sequence = this._getXHRPromise(true);

            this._sending = this._active = this._loaded = this._total = 0;

            this._initEventHandlers();

        },

        destroy: function () {

            this._destroyEventHandlers();

            $.Widget.prototype.destroy.call(this);

        },

        enable: function () {

            $.Widget.prototype.enable.call(this);

            this._initEventHandlers();

        },

        disable: function () {

            this._destroyEventHandlers();

            $.Widget.prototype.disable.call(this);

        },

        // 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) {

            if (!data || this.options.disabled) {

                return;

            }

            data.files = $.each($.makeArray(data.files), this._normalizeFile);

            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 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) {

                data.files = $.each($.makeArray(data.files), this._normalizeFile);

                if (data.files.length) {

                    return this._onSend(null, data);

                }

            }

            return this._getXHRPromise(false, data && data.context);

        }

    });

}(jQuery));