| 提交 | 用户 | 时间 | ||
| 58d006 | 1 | /* |
| A | 2 | * jQuery File Upload Image Preview & Resize Plugin 1.2.3 |
| 3 | * https://github.com/blueimp/jQuery-File-Upload | |
| 4 | * | |
| 5 | * Copyright 2013, 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, DataView, Blob, Uint8Array */ | |
| 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 | 'load-image-meta', | |
| 23 | 'load-image-exif', | |
| 24 | 'load-image-ios', | |
| 25 | 'canvas-to-blob', | |
| 26 | './jquery.fileupload-process' | |
| 27 | ], factory); | |
| 28 | } else { | |
| 29 | // Browser globals: | |
| 30 | factory( | |
| 31 | window.jQuery, | |
| 32 | window.loadImage | |
| 33 | ); | |
| 34 | } | |
| 35 | }(function ($, loadImage) { | |
| 36 | 'use strict'; | |
| 37 | ||
| 38 | // Prepend to the default processQueue: | |
| 39 | $.blueimp.fileupload.prototype.options.processQueue.unshift( | |
| 40 | { | |
| 41 | action: 'loadImageMetaData', | |
| 42 | disableImageHead: '@', | |
| 43 | disableExif: '@', | |
| 44 | disableExifThumbnail: '@', | |
| 45 | disableExifSub: '@', | |
| 46 | disableExifGps: '@', | |
| 47 | disabled: '@disableImageMetaDataLoad' | |
| 48 | }, | |
| 49 | { | |
| 50 | action: 'loadImage', | |
| 51 | // Use the action as prefix for the "@" options: | |
| 52 | prefix: true, | |
| 53 | fileTypes: '@', | |
| 54 | maxFileSize: '@', | |
| 55 | noRevoke: '@', | |
| 56 | disabled: '@disableImageLoad' | |
| 57 | }, | |
| 58 | { | |
| 59 | action: 'resizeImage', | |
| 60 | // Use "image" as prefix for the "@" options: | |
| 61 | prefix: 'image', | |
| 62 | maxWidth: '@', | |
| 63 | maxHeight: '@', | |
| 64 | minWidth: '@', | |
| 65 | minHeight: '@', | |
| 66 | crop: '@', | |
| 67 | disabled: '@disableImageResize' | |
| 68 | }, | |
| 69 | { | |
| 70 | action: 'saveImage', | |
| 71 | disabled: '@disableImageResize' | |
| 72 | }, | |
| 73 | { | |
| 74 | action: 'saveImageMetaData', | |
| 75 | disabled: '@disableImageMetaDataSave' | |
| 76 | }, | |
| 77 | { | |
| 78 | action: 'resizeImage', | |
| 79 | // Use "preview" as prefix for the "@" options: | |
| 80 | prefix: 'preview', | |
| 81 | maxWidth: '@', | |
| 82 | maxHeight: '@', | |
| 83 | minWidth: '@', | |
| 84 | minHeight: '@', | |
| 85 | crop: '@', | |
| 86 | orientation: '@', | |
| 87 | thumbnail: '@', | |
| 88 | canvas: '@', | |
| 89 | disabled: '@disableImagePreview' | |
| 90 | }, | |
| 91 | { | |
| 92 | action: 'setImage', | |
| 93 | name: '@imagePreviewName', | |
| 94 | disabled: '@disableImagePreview' | |
| 95 | } | |
| 96 | ); | |
| 97 | ||
| 98 | // The File Upload Resize plugin extends the fileupload widget | |
| 99 | // with image resize functionality: | |
| 100 | $.widget('blueimp.fileupload', $.blueimp.fileupload, { | |
| 101 | ||
| 102 | options: { | |
| 103 | // The regular expression for the types of images to load: | |
| 104 | // matched against the file type: | |
| 105 | loadImageFileTypes: /^image\/(gif|jpeg|png)$/, | |
| 106 | // The maximum file size of images to load: | |
| 107 | loadImageMaxFileSize: 10000000, // 10MB | |
| 108 | // The maximum width of resized images: | |
| 109 | imageMaxWidth: 1920, | |
| 110 | // The maximum height of resized images: | |
| 111 | imageMaxHeight: 1080, | |
| 112 | // Define if resized images should be cropped or only scaled: | |
| 113 | imageCrop: false, | |
| 114 | // Disable the resize image functionality by default: | |
| 115 | disableImageResize: true, | |
| 116 | // The maximum width of the preview images: | |
| 117 | previewMaxWidth: 80, | |
| 118 | // The maximum height of the preview images: | |
| 119 | previewMaxHeight: 80, | |
| 120 | // Defines the preview orientation (1-8) or takes the orientation | |
| 121 | // value from Exif data if set to true: | |
| 122 | previewOrientation: true, | |
| 123 | // Create the preview using the Exif data thumbnail: | |
| 124 | previewThumbnail: true, | |
| 125 | // Define if preview images should be cropped or only scaled: | |
| 126 | previewCrop: false, | |
| 127 | // Define if preview images should be resized as canvas elements: | |
| 128 | previewCanvas: true | |
| 129 | }, | |
| 130 | ||
| 131 | processActions: { | |
| 132 | ||
| 133 | // Loads the image given via data.files and data.index | |
| 134 | // as img element if the browser supports canvas. | |
| 135 | // Accepts the options fileTypes (regular expression) | |
| 136 | // and maxFileSize (integer) to limit the files to load: | |
| 137 | loadImage: function (data, options) { | |
| 138 | if (options.disabled) { | |
| 139 | return data; | |
| 140 | } | |
| 141 | var that = this, | |
| 142 | file = data.files[data.index], | |
| 143 | dfd = $.Deferred(); | |
| 144 | if (($.type(options.maxFileSize) === 'number' && | |
| 145 | file.size > options.maxFileSize) || | |
| 146 | (options.fileTypes && | |
| 147 | !options.fileTypes.test(file.type)) || | |
| 148 | !loadImage( | |
| 149 | file, | |
| 150 | function (img) { | |
| 151 | if (img.src) { | |
| 152 | data.img = img; | |
| 153 | } | |
| 154 | dfd.resolveWith(that, [data]); | |
| 155 | }, | |
| 156 | options | |
| 157 | )) { | |
| 158 | return data; | |
| 159 | } | |
| 160 | return dfd.promise(); | |
| 161 | }, | |
| 162 | ||
| 163 | // Resizes the image given as data.canvas or data.img | |
| 164 | // and updates data.canvas or data.img with the resized image. | |
| 165 | // Accepts the options maxWidth, maxHeight, minWidth, | |
| 166 | // minHeight, canvas and crop: | |
| 167 | resizeImage: function (data, options) { | |
| 168 | if (options.disabled) { | |
| 169 | return data; | |
| 170 | } | |
| 171 | var that = this, | |
| 172 | dfd = $.Deferred(), | |
| 173 | resolve = function (newImg) { | |
| 174 | data[newImg.getContext ? 'canvas' : 'img'] = newImg; | |
| 175 | dfd.resolveWith(that, [data]); | |
| 176 | }, | |
| 177 | thumbnail, | |
| 178 | img, | |
| 179 | newImg; | |
| 180 | options = $.extend({canvas: true}, options); | |
| 181 | if (data.exif) { | |
| 182 | if (options.orientation === true) { | |
| 183 | options.orientation = data.exif.get('Orientation'); | |
| 184 | } | |
| 185 | if (options.thumbnail) { | |
| 186 | thumbnail = data.exif.get('Thumbnail'); | |
| 187 | if (thumbnail) { | |
| 188 | loadImage(thumbnail, resolve, options); | |
| 189 | return dfd.promise(); | |
| 190 | } | |
| 191 | } | |
| 192 | } | |
| 193 | img = (options.canvas && data.canvas) || data.img; | |
| 194 | if (img) { | |
| 195 | newImg = loadImage.scale(img, options); | |
| 196 | if (newImg.width !== img.width || | |
| 197 | newImg.height !== img.height) { | |
| 198 | resolve(newImg); | |
| 199 | return dfd.promise(); | |
| 200 | } | |
| 201 | } | |
| 202 | return data; | |
| 203 | }, | |
| 204 | ||
| 205 | // Saves the processed image given as data.canvas | |
| 206 | // inplace at data.index of data.files: | |
| 207 | saveImage: function (data, options) { | |
| 208 | if (!data.canvas || options.disabled) { | |
| 209 | return data; | |
| 210 | } | |
| 211 | var that = this, | |
| 212 | file = data.files[data.index], | |
| 213 | name = file.name, | |
| 214 | dfd = $.Deferred(), | |
| 215 | callback = function (blob) { | |
| 216 | if (!blob.name) { | |
| 217 | if (file.type === blob.type) { | |
| 218 | blob.name = file.name; | |
| 219 | } else if (file.name) { | |
| 220 | blob.name = file.name.replace( | |
| 221 | /\..+$/, | |
| 222 | '.' + blob.type.substr(6) | |
| 223 | ); | |
| 224 | } | |
| 225 | } | |
| 226 | // Store the created blob at the position | |
| 227 | // of the original file in the files list: | |
| 228 | data.files[data.index] = blob; | |
| 229 | dfd.resolveWith(that, [data]); | |
| 230 | }; | |
| 231 | // Use canvas.mozGetAsFile directly, to retain the filename, as | |
| 232 | // Gecko doesn't support the filename option for FormData.append: | |
| 233 | if (data.canvas.mozGetAsFile) { | |
| 234 | callback(data.canvas.mozGetAsFile( | |
| 235 | (/^image\/(jpeg|png)$/.test(file.type) && name) || | |
| 236 | ((name && name.replace(/\..+$/, '')) || | |
| 237 | 'blob') + '.png', | |
| 238 | file.type | |
| 239 | )); | |
| 240 | } else if (data.canvas.toBlob) { | |
| 241 | data.canvas.toBlob(callback, file.type); | |
| 242 | } else { | |
| 243 | return data; | |
| 244 | } | |
| 245 | return dfd.promise(); | |
| 246 | }, | |
| 247 | ||
| 248 | loadImageMetaData: function (data, options) { | |
| 249 | if (options.disabled) { | |
| 250 | return data; | |
| 251 | } | |
| 252 | var that = this, | |
| 253 | dfd = $.Deferred(); | |
| 254 | loadImage.parseMetaData(data.files[data.index], function (result) { | |
| 255 | $.extend(data, result); | |
| 256 | dfd.resolveWith(that, [data]); | |
| 257 | }, options); | |
| 258 | return dfd.promise(); | |
| 259 | }, | |
| 260 | ||
| 261 | saveImageMetaData: function (data, options) { | |
| 262 | if (!(data.imageHead && data.canvas && | |
| 263 | data.canvas.toBlob && !options.disabled)) { | |
| 264 | return data; | |
| 265 | } | |
| 266 | var file = data.files[data.index], | |
| 267 | blob = new Blob([ | |
| 268 | data.imageHead, | |
| 269 | // Resized images always have a head size of 20 bytes, | |
| 270 | // including the JPEG marker and a minimal JFIF header: | |
| 271 | this._blobSlice.call(file, 20) | |
| 272 | ], {type: file.type}); | |
| 273 | blob.name = file.name; | |
| 274 | data.files[data.index] = blob; | |
| 275 | return data; | |
| 276 | }, | |
| 277 | ||
| 278 | // Sets the resized version of the image as a property of the | |
| 279 | // file object, must be called after "saveImage": | |
| 280 | setImage: function (data, options) { | |
| 281 | var img = data.canvas || data.img; | |
| 282 | if (img && !options.disabled) { | |
| 283 | data.files[data.index][options.name || 'preview'] = img; | |
| 284 | } | |
| 285 | return data; | |
| 286 | } | |
| 287 | ||
| 288 | } | |
| 289 | ||
| 290 | }); | |
| 291 | ||
| 292 | })); | |
