| 提交 | 用户 | 时间 | ||
| 58d006 | 1 | /* |
| A | 2 | * jQuery File Upload Image Preview & Resize Plugin 1.7.0 |
| 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 | /* jshint nomen:false */ | |
| 13 | /* global define, window, Blob */ | |
| 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 | orientation: '@', | |
| 68 | forceResize: '@', | |
| 69 | disabled: '@disableImageResize' | |
| 70 | }, | |
| 71 | { | |
| 72 | action: 'saveImage', | |
| 73 | quality: '@imageQuality', | |
| 74 | type: '@imageType', | |
| 75 | disabled: '@disableImageResize' | |
| 76 | }, | |
| 77 | { | |
| 78 | action: 'saveImageMetaData', | |
| 79 | disabled: '@disableImageMetaDataSave' | |
| 80 | }, | |
| 81 | { | |
| 82 | action: 'resizeImage', | |
| 83 | // Use "preview" as prefix for the "@" options: | |
| 84 | prefix: 'preview', | |
| 85 | maxWidth: '@', | |
| 86 | maxHeight: '@', | |
| 87 | minWidth: '@', | |
| 88 | minHeight: '@', | |
| 89 | crop: '@', | |
| 90 | orientation: '@', | |
| 91 | thumbnail: '@', | |
| 92 | canvas: '@', | |
| 93 | disabled: '@disableImagePreview' | |
| 94 | }, | |
| 95 | { | |
| 96 | action: 'setImage', | |
| 97 | name: '@imagePreviewName', | |
| 98 | disabled: '@disableImagePreview' | |
| 99 | }, | |
| 100 | { | |
| 101 | action: 'deleteImageReferences', | |
| 102 | disabled: '@disableImageReferencesDeletion' | |
| 103 | } | |
| 104 | ); | |
| 105 | ||
| 106 | // The File Upload Resize plugin extends the fileupload widget | |
| 107 | // with image resize functionality: | |
| 108 | $.widget('blueimp.fileupload', $.blueimp.fileupload, { | |
| 109 | ||
| 110 | options: { | |
| 111 | // The regular expression for the types of images to load: | |
| 112 | // matched against the file type: | |
| 113 | loadImageFileTypes: /^image\/(gif|jpeg|png)$/, | |
| 114 | // The maximum file size of images to load: | |
| 115 | loadImageMaxFileSize: 10000000, // 10MB | |
| 116 | // The maximum width of resized images: | |
| 117 | imageMaxWidth: 1920, | |
| 118 | // The maximum height of resized images: | |
| 119 | imageMaxHeight: 1080, | |
| 120 | // Defines the image orientation (1-8) or takes the orientation | |
| 121 | // value from Exif data if set to true: | |
| 122 | imageOrientation: false, | |
| 123 | // Define if resized images should be cropped or only scaled: | |
| 124 | imageCrop: false, | |
| 125 | // Disable the resize image functionality by default: | |
| 126 | disableImageResize: true, | |
| 127 | // The maximum width of the preview images: | |
| 128 | previewMaxWidth: 80, | |
| 129 | // The maximum height of the preview images: | |
| 130 | previewMaxHeight: 80, | |
| 131 | // Defines the preview orientation (1-8) or takes the orientation | |
| 132 | // value from Exif data if set to true: | |
| 133 | previewOrientation: true, | |
| 134 | // Create the preview using the Exif data thumbnail: | |
| 135 | previewThumbnail: true, | |
| 136 | // Define if preview images should be cropped or only scaled: | |
| 137 | previewCrop: false, | |
| 138 | // Define if preview images should be resized as canvas elements: | |
| 139 | previewCanvas: true | |
| 140 | }, | |
| 141 | ||
| 142 | processActions: { | |
| 143 | ||
| 144 | // Loads the image given via data.files and data.index | |
| 145 | // as img element, if the browser supports the File API. | |
| 146 | // Accepts the options fileTypes (regular expression) | |
| 147 | // and maxFileSize (integer) to limit the files to load: | |
| 148 | loadImage: function (data, options) { | |
| 149 | if (options.disabled) { | |
| 150 | return data; | |
| 151 | } | |
| 152 | var that = this, | |
| 153 | file = data.files[data.index], | |
| 154 | dfd = $.Deferred(); | |
| 155 | if (($.type(options.maxFileSize) === 'number' && | |
| 156 | file.size > options.maxFileSize) || | |
| 157 | (options.fileTypes && | |
| 158 | !options.fileTypes.test(file.type)) || | |
| 159 | !loadImage( | |
| 160 | file, | |
| 161 | function (img) { | |
| 162 | if (img.src) { | |
| 163 | data.img = img; | |
| 164 | } | |
| 165 | dfd.resolveWith(that, [data]); | |
| 166 | }, | |
| 167 | options | |
| 168 | )) { | |
| 169 | return data; | |
| 170 | } | |
| 171 | return dfd.promise(); | |
| 172 | }, | |
| 173 | ||
| 174 | // Resizes the image given as data.canvas or data.img | |
| 175 | // and updates data.canvas or data.img with the resized image. | |
| 176 | // Also stores the resized image as preview property. | |
| 177 | // Accepts the options maxWidth, maxHeight, minWidth, | |
| 178 | // minHeight, canvas and crop: | |
| 179 | resizeImage: function (data, options) { | |
| 180 | if (options.disabled || !(data.canvas || data.img)) { | |
| 181 | return data; | |
| 182 | } | |
| 183 | options = $.extend({canvas: true}, options); | |
| 184 | var that = this, | |
| 185 | dfd = $.Deferred(), | |
| 186 | img = (options.canvas && data.canvas) || data.img, | |
| 187 | resolve = function (newImg) { | |
| 188 | if (newImg && (newImg.width !== img.width || | |
| 189 | newImg.height !== img.height || | |
| 190 | options.forceResize)) { | |
| 191 | data[newImg.getContext ? 'canvas' : 'img'] = newImg; | |
| 192 | } | |
| 193 | data.preview = newImg; | |
| 194 | dfd.resolveWith(that, [data]); | |
| 195 | }, | |
| 196 | thumbnail; | |
| 197 | if (data.exif) { | |
| 198 | if (options.orientation === true) { | |
| 199 | options.orientation = data.exif.get('Orientation'); | |
| 200 | } | |
| 201 | if (options.thumbnail) { | |
| 202 | thumbnail = data.exif.get('Thumbnail'); | |
| 203 | if (thumbnail) { | |
| 204 | loadImage(thumbnail, resolve, options); | |
| 205 | return dfd.promise(); | |
| 206 | } | |
| 207 | } | |
| 208 | } | |
| 209 | if (img) { | |
| 210 | resolve(loadImage.scale(img, options)); | |
| 211 | return dfd.promise(); | |
| 212 | } | |
| 213 | return data; | |
| 214 | }, | |
| 215 | ||
| 216 | // Saves the processed image given as data.canvas | |
| 217 | // inplace at data.index of data.files: | |
| 218 | saveImage: function (data, options) { | |
| 219 | if (!data.canvas || options.disabled) { | |
| 220 | return data; | |
| 221 | } | |
| 222 | var that = this, | |
| 223 | file = data.files[data.index], | |
| 224 | dfd = $.Deferred(); | |
| 225 | if (data.canvas.toBlob) { | |
| 226 | data.canvas.toBlob( | |
| 227 | function (blob) { | |
| 228 | if (!blob.name) { | |
| 229 | if (file.type === blob.type) { | |
| 230 | blob.name = file.name; | |
| 231 | } else if (file.name) { | |
| 232 | blob.name = file.name.replace( | |
| 233 | /\..+$/, | |
| 234 | '.' + blob.type.substr(6) | |
| 235 | ); | |
| 236 | } | |
| 237 | } | |
| 238 | // Don't restore invalid meta data: | |
| 239 | if (file.type !== blob.type) { | |
| 240 | delete data.imageHead; | |
| 241 | } | |
| 242 | // Store the created blob at the position | |
| 243 | // of the original file in the files list: | |
| 244 | data.files[data.index] = blob; | |
| 245 | dfd.resolveWith(that, [data]); | |
| 246 | }, | |
| 247 | options.type || file.type, | |
| 248 | options.quality | |
| 249 | ); | |
| 250 | } else { | |
| 251 | return data; | |
| 252 | } | |
| 253 | return dfd.promise(); | |
| 254 | }, | |
| 255 | ||
| 256 | loadImageMetaData: function (data, options) { | |
| 257 | if (options.disabled) { | |
| 258 | return data; | |
| 259 | } | |
| 260 | var that = this, | |
| 261 | dfd = $.Deferred(); | |
| 262 | loadImage.parseMetaData(data.files[data.index], function (result) { | |
| 263 | $.extend(data, result); | |
| 264 | dfd.resolveWith(that, [data]); | |
| 265 | }, options); | |
| 266 | return dfd.promise(); | |
| 267 | }, | |
| 268 | ||
| 269 | saveImageMetaData: function (data, options) { | |
| 270 | if (!(data.imageHead && data.canvas && | |
| 271 | data.canvas.toBlob && !options.disabled)) { | |
| 272 | return data; | |
| 273 | } | |
| 274 | var file = data.files[data.index], | |
| 275 | blob = new Blob([ | |
| 276 | data.imageHead, | |
| 277 | // Resized images always have a head size of 20 bytes, | |
| 278 | // including the JPEG marker and a minimal JFIF header: | |
| 279 | this._blobSlice.call(file, 20) | |
| 280 | ], {type: file.type}); | |
| 281 | blob.name = file.name; | |
| 282 | data.files[data.index] = blob; | |
| 283 | return data; | |
| 284 | }, | |
| 285 | ||
| 286 | // Sets the resized version of the image as a property of the | |
| 287 | // file object, must be called after "saveImage": | |
| 288 | setImage: function (data, options) { | |
| 289 | if (data.preview && !options.disabled) { | |
| 290 | data.files[data.index][options.name || 'preview'] = data.preview; | |
| 291 | } | |
| 292 | return data; | |
| 293 | }, | |
| 294 | ||
| 295 | deleteImageReferences: function (data, options) { | |
| 296 | if (!options.disabled) { | |
| 297 | delete data.img; | |
| 298 | delete data.canvas; | |
| 299 | delete data.preview; | |
| 300 | delete data.imageHead; | |
| 301 | } | |
| 302 | return data; | |
| 303 | } | |
| 304 | ||
| 305 | } | |
| 306 | ||
| 307 | }); | |
| 308 | ||
| 309 | })); | |
