224 lines
8.3 KiB
JavaScript
224 lines
8.3 KiB
JavaScript
/*
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* jQuery File Upload File Processing Plugin 1.2.1
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* https://github.com/blueimp/jQuery-File-Upload
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*
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* Copyright 2012, Sebastian Tschan
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* https://blueimp.net
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/MIT
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*/
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/*jslint nomen: true, unparam: true, regexp: true */
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/*global define, window, document */
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(function (factory) {
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'use strict';
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if (typeof define === 'function' && define.amd) {
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// Register as an anonymous AMD module:
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define([
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'jquery',
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'load-image',
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'canvas-to-blob',
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'./jquery.fileupload'
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], factory);
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} else {
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// Browser globals:
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factory(
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window.jQuery,
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window.loadImage
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);
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}
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}(function ($, loadImage) {
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'use strict';
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// The File Upload FP version extends the fileupload widget
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// with file processing functionality:
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$.widget('blueimp.fileupload', $.blueimp.fileupload, {
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options: {
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// The list of file processing actions:
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process: [
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/*
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{
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action: 'load',
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fileTypes: /^image\/(gif|jpeg|png)$/,
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maxFileSize: 20000000 // 20MB
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},
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{
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action: 'resize',
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maxWidth: 1920,
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maxHeight: 1200,
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minWidth: 800,
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minHeight: 600
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},
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{
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action: 'save'
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}
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*/
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],
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// The add callback is invoked as soon as files are added to the
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// fileupload widget (via file input selection, drag & drop or add
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// API call). See the basic file upload widget for more information:
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add: function (e, data) {
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$(this).fileupload('process', data).done(function () {
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data.submit();
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});
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}
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},
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processActions: {
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// Loads the image given via data.files and data.index
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// as img element if the browser supports canvas.
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// Accepts the options fileTypes (regular expression)
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// and maxFileSize (integer) to limit the files to load:
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load: function (data, options) {
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var that = this,
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file = data.files[data.index],
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dfd = $.Deferred();
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if (window.HTMLCanvasElement &&
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window.HTMLCanvasElement.prototype.toBlob &&
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($.type(options.maxFileSize) !== 'number' ||
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file.size < options.maxFileSize) &&
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(!options.fileTypes ||
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options.fileTypes.test(file.type))) {
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loadImage(
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file,
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function (img) {
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if (!img.src) {
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return dfd.rejectWith(that, [data]);
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}
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data.img = img;
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dfd.resolveWith(that, [data]);
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}
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);
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} else {
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dfd.rejectWith(that, [data]);
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}
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return dfd.promise();
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},
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// Resizes the image given as data.img and updates
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// data.canvas with the resized image as canvas element.
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// Accepts the options maxWidth, maxHeight, minWidth and
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// minHeight to scale the given image:
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resize: function (data, options) {
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var img = data.img,
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canvas;
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options = $.extend({canvas: true}, options);
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if (img) {
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canvas = loadImage.scale(img, options);
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if (canvas.width !== img.width ||
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canvas.height !== img.height) {
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data.canvas = canvas;
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}
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}
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return data;
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},
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// Saves the processed image given as data.canvas
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// inplace at data.index of data.files:
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save: function (data, options) {
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// Do nothing if no processing has happened:
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if (!data.canvas) {
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return data;
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}
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var that = this,
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file = data.files[data.index],
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name = file.name,
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dfd = $.Deferred(),
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callback = function (blob) {
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if (!blob.name) {
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if (file.type === blob.type) {
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blob.name = file.name;
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} else if (file.name) {
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blob.name = file.name.replace(
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/\..+$/,
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'.' + blob.type.substr(6)
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);
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}
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}
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// Store the created blob at the position
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// of the original file in the files list:
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data.files[data.index] = blob;
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dfd.resolveWith(that, [data]);
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};
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// Use canvas.mozGetAsFile directly, to retain the filename, as
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// Gecko doesn't support the filename option for FormData.append:
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if (data.canvas.mozGetAsFile) {
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callback(data.canvas.mozGetAsFile(
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(/^image\/(jpeg|png)$/.test(file.type) && name) ||
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((name && name.replace(/\..+$/, '')) ||
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'blob') + '.png',
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file.type
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));
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} else {
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data.canvas.toBlob(callback, file.type);
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}
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return dfd.promise();
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}
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},
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// Resizes the file at the given index and stores the created blob at
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// the original position of the files list, returns a Promise object:
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_processFile: function (files, index, options) {
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var that = this,
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dfd = $.Deferred().resolveWith(that, [{
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files: files,
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index: index
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}]),
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chain = dfd.promise();
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that._processing += 1;
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$.each(options.process, function (i, settings) {
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chain = chain.pipe(function (data) {
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return that.processActions[settings.action]
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.call(this, data, settings);
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});
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});
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chain.always(function () {
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that._processing -= 1;
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if (that._processing === 0) {
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that.element
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.removeClass('fileupload-processing');
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}
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});
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if (that._processing === 1) {
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that.element.addClass('fileupload-processing');
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}
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return chain;
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},
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// Processes the files given as files property of the data parameter,
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// returns a Promise object that allows to bind a done handler, which
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// will be invoked after processing all files (inplace) is done:
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process: function (data) {
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var that = this,
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options = $.extend({}, this.options, data);
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if (options.process && options.process.length &&
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this._isXHRUpload(options)) {
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$.each(data.files, function (index, file) {
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that._processingQueue = that._processingQueue.pipe(
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function () {
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var dfd = $.Deferred();
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that._processFile(data.files, index, options)
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.always(function () {
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dfd.resolveWith(that);
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});
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return dfd.promise();
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}
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);
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});
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}
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return this._processingQueue;
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},
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_create: function () {
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this._super();
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this._processing = 0;
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this._processingQueue = $.Deferred().resolveWith(this)
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.promise();
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}
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});
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}));
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