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| 1 | +/* |
| 2 | + * jQuery File Upload File Processing Plugin 1.0 |
| 3 | + * https://github.com/blueimp/jQuery-File-Upload |
| 4 | + * |
| 5 | + * Copyright 2012, Sebastian Tschan |
| 6 | + * https://blueimp.net |
| 7 | + * |
| 8 | + * Licensed under the MIT license: |
| 9 | + * http://www.opensource.org/licenses/MIT |
| 10 | + */ |
| 11 | + |
| 12 | +/*jslint nomen: true, unparam: true, regexp: true */ |
| 13 | +/*global define, window, document */ |
| 14 | + |
| 15 | +(function (factory) { |
| 16 | + 'use strict'; |
| 17 | + if (typeof define === 'function' && define.amd) { |
| 18 | + // Register as an anonymous AMD module: |
| 19 | + define([ |
| 20 | + 'jquery', |
| 21 | + 'load-image', |
| 22 | + 'canvas-to-blob', |
| 23 | + './jquery.fileupload' |
| 24 | + ], factory); |
| 25 | + } else { |
| 26 | + // Browser globals: |
| 27 | + factory( |
| 28 | + window.jQuery, |
| 29 | + window.loadImage |
| 30 | + ); |
| 31 | + } |
| 32 | +}(function ($, loadImage) { |
| 33 | + 'use strict'; |
| 34 | + |
| 35 | + // The File Upload IP version extends the basic fileupload widget |
| 36 | + // with file processing functionality: |
| 37 | + $.widget('blueimpFP.fileupload', $.blueimp.fileupload, { |
| 38 | + |
| 39 | + options: { |
| 40 | + // The list of file processing actions: |
| 41 | + process: [ |
| 42 | + /* |
| 43 | + { |
| 44 | + action: 'load', |
| 45 | + fileTypes: /^image\/(gif|jpeg|png)$/, |
| 46 | + maxFileSize: 20000000 // 20MB |
| 47 | + }, |
| 48 | + { |
| 49 | + action: 'resize', |
| 50 | + maxWidth: 1920, |
| 51 | + maxHeight: 1200, |
| 52 | + minWidth: 800, |
| 53 | + minHeight: 600 |
| 54 | + }, |
| 55 | + { |
| 56 | + action: 'save' |
| 57 | + } |
| 58 | + */ |
| 59 | + ], |
| 60 | + |
| 61 | + // The add callback is invoked as soon as files are added to the |
| 62 | + // fileupload widget (via file input selection, drag & drop or add |
| 63 | + // API call). See the basic file upload widget for more information: |
| 64 | + add: function (e, data) { |
| 65 | + $(this).fileupload('process', data).done(function () { |
| 66 | + data.submit(); |
| 67 | + }); |
| 68 | + } |
| 69 | + }, |
| 70 | + |
| 71 | + processActions: { |
| 72 | + // Loads the image given via data.files and data.index |
| 73 | + // as canvas element. |
| 74 | + // Accepts the options fileTypes (regular expression) |
| 75 | + // and maxFileSize (integer) to limit the files to load: |
| 76 | + load: function (data, options) { |
| 77 | + var that = this, |
| 78 | + file = data.files[data.index], |
| 79 | + dfd = $.Deferred(); |
| 80 | + if (window.HTMLCanvasElement && |
| 81 | + window.HTMLCanvasElement.prototype.toBlob && |
| 82 | + ($.type(options.maxFileSize) !== 'number' || |
| 83 | + file.size < options.maxFileSize) && |
| 84 | + (!options.fileTypes || |
| 85 | + options.fileTypes.test(file.type))) { |
| 86 | + loadImage( |
| 87 | + file, |
| 88 | + function (canvas) { |
| 89 | + data.canvas = canvas; |
| 90 | + dfd.resolveWith(that, [data]); |
| 91 | + }, |
| 92 | + {canvas: true} |
| 93 | + ); |
| 94 | + } else { |
| 95 | + dfd.rejectWith(that, [data]); |
| 96 | + } |
| 97 | + return dfd.promise(); |
| 98 | + }, |
| 99 | + // Resizes the image given as data.canvas and updates |
| 100 | + // data.canvas with the resized image. |
| 101 | + // Accepts the options maxWidth, maxHeight, minWidth and |
| 102 | + // minHeight to scale the given image: |
| 103 | + resize: function (data, options) { |
| 104 | + if (data.canvas) { |
| 105 | + var canvas = loadImage.scale(data.canvas, options); |
| 106 | + if (canvas.width !== data.canvas.width || |
| 107 | + canvas.height !== data.canvas.height) { |
| 108 | + data.canvas = canvas; |
| 109 | + data.processed = true; |
| 110 | + } |
| 111 | + } |
| 112 | + return data; |
| 113 | + }, |
| 114 | + // Saves the processed image given as data.canvas |
| 115 | + // inplace at data.index of data.files: |
| 116 | + save: function (data, options) { |
| 117 | + // Do nothing if no processing has happened: |
| 118 | + if (!data.canvas || !data.processed) { |
| 119 | + return data; |
| 120 | + } |
| 121 | + var that = this, |
| 122 | + file = data.files[data.index], |
| 123 | + name = file.name, |
| 124 | + dfd = $.Deferred(), |
| 125 | + callback = function (blob) { |
| 126 | + if (!blob.name) { |
| 127 | + if (file.type === blob.type) { |
| 128 | + blob.name = file.name; |
| 129 | + } else if (file.name) { |
| 130 | + blob.name = file.name.replace( |
| 131 | + /\..+$/, |
| 132 | + '.' + blob.type.substr(6) |
| 133 | + ); |
| 134 | + } |
| 135 | + } |
| 136 | + // Store the created blob at the position |
| 137 | + // of the original file in the files list: |
| 138 | + data.files[data.index] = blob; |
| 139 | + dfd.resolveWith(that, [data]); |
| 140 | + }; |
| 141 | + // Use canvas.mozGetAsFile directly, to retain the filename, as |
| 142 | + // Gecko doesn't support the filename option for FormData.append: |
| 143 | + if (data.canvas.mozGetAsFile) { |
| 144 | + callback(data.canvas.mozGetAsFile( |
| 145 | + (/^image\/(jpeg|png)$/.test(file.type) && name) || |
| 146 | + ((name && name.replace(/\..+$/, '')) || |
| 147 | + 'blob') + '.png', |
| 148 | + file.type |
| 149 | + )); |
| 150 | + } else { |
| 151 | + data.canvas.toBlob(callback, file.type); |
| 152 | + } |
| 153 | + return dfd.promise(); |
| 154 | + } |
| 155 | + }, |
| 156 | + |
| 157 | + // Resizes the file at the given index and stores the created blob at |
| 158 | + // the original position of the files list, returns a Promise object: |
| 159 | + _processFile: function (files, index, options) { |
| 160 | + var that = this, |
| 161 | + dfd = $.Deferred().resolveWith(that, [{ |
| 162 | + files: files, |
| 163 | + index: index |
| 164 | + }]), |
| 165 | + chain = dfd.promise(); |
| 166 | + that._processing += 1; |
| 167 | + $.each(options.process, function (i, settings) { |
| 168 | + chain = chain.pipe(function (data) { |
| 169 | + return that.processActions[settings.action] |
| 170 | + .call(this, data, settings); |
| 171 | + }); |
| 172 | + }); |
| 173 | + chain.always(function () { |
| 174 | + that._processing -= 1; |
| 175 | + if (that._processing === 0) { |
| 176 | + that.element |
| 177 | + .removeClass('fileupload-processing'); |
| 178 | + } |
| 179 | + }); |
| 180 | + if (that._processing === 1) { |
| 181 | + that.element.addClass('fileupload-processing'); |
| 182 | + } |
| 183 | + return chain; |
| 184 | + }, |
| 185 | + |
| 186 | + // Processes the files given as files property of the data parameter, |
| 187 | + // returns a Promise object that allows to bind a done handler, which |
| 188 | + // will be invoked after processing all files (inplace) is done: |
| 189 | + process: function (data) { |
| 190 | + var that = this, |
| 191 | + options = $.extend({}, this.options, data); |
| 192 | + if (options.process && options.process.length && |
| 193 | + this._isXHRUpload(options)) { |
| 194 | + $.each(data.files, function (index, file) { |
| 195 | + that._processingQueue = that._processingQueue.pipe( |
| 196 | + function () { |
| 197 | + var dfd = $.Deferred(); |
| 198 | + that._processFile(data.files, index, options) |
| 199 | + .always(function () { |
| 200 | + dfd.resolveWith(that); |
| 201 | + }); |
| 202 | + return dfd.promise(); |
| 203 | + } |
| 204 | + ); |
| 205 | + }); |
| 206 | + } |
| 207 | + return this._processingQueue; |
| 208 | + }, |
| 209 | + |
| 210 | + _create: function () { |
| 211 | + $.blueimp.fileupload.prototype._create.call(this); |
| 212 | + this._processing = 0; |
| 213 | + this._processingQueue = $.Deferred().resolveWith(this) |
| 214 | + .promise(); |
| 215 | + } |
| 216 | + |
| 217 | + }); |
| 218 | + |
| 219 | +})); |
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