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/* |
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* jQuery File Upload Image Preview & Resize Plugin |
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* https://github.com/blueimp/jQuery-File-Upload |
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* |
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* Copyright 2013, 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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|
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/* jshint nomen:false */ |
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/* global define, require, window, Blob */ |
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|
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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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'load-image-meta', |
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'load-image-exif', |
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'load-image-ios', |
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'canvas-to-blob', |
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'./jquery.fileupload-process' |
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], factory); |
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} else if (typeof exports === 'object') { |
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// Node/CommonJS: |
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factory( |
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require('jquery'), |
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require('load-image') |
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); |
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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 ($, loadImage) { |
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'use strict'; |
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|
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// Prepend to the default processQueue: |
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$.blueimp.fileupload.prototype.options.processQueue.unshift( |
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{ |
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action: 'loadImageMetaData', |
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disableImageHead: '@', |
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disableExif: '@', |
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disableExifThumbnail: '@', |
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disableExifSub: '@', |
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disableExifGps: '@', |
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disabled: '@disableImageMetaDataLoad' |
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}, |
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{ |
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action: 'loadImage', |
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// Use the action as prefix for the "@" options: |
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prefix: true, |
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fileTypes: '@', |
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maxFileSize: '@', |
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noRevoke: '@', |
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disabled: '@disableImageLoad' |
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}, |
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{ |
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action: 'resizeImage', |
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// Use "image" as prefix for the "@" options: |
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prefix: 'image', |
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maxWidth: '@', |
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maxHeight: '@', |
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minWidth: '@', |
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minHeight: '@', |
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crop: '@', |
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orientation: '@', |
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forceResize: '@', |
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disabled: '@disableImageResize' |
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}, |
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{ |
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action: 'saveImage', |
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quality: '@imageQuality', |
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type: '@imageType', |
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disabled: '@disableImageResize' |
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}, |
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{ |
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action: 'saveImageMetaData', |
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disabled: '@disableImageMetaDataSave' |
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}, |
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{ |
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action: 'resizeImage', |
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// Use "preview" as prefix for the "@" options: |
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prefix: 'preview', |
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maxWidth: '@', |
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maxHeight: '@', |
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minWidth: '@', |
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minHeight: '@', |
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crop: '@', |
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orientation: '@', |
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thumbnail: '@', |
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canvas: '@', |
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disabled: '@disableImagePreview' |
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}, |
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{ |
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action: 'setImage', |
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name: '@imagePreviewName', |
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disabled: '@disableImagePreview' |
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}, |
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{ |
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action: 'deleteImageReferences', |
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disabled: '@disableImageReferencesDeletion' |
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} |
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); |
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|
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// The File Upload Resize plugin extends the fileupload widget |
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// with image resize functionality: |
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$.widget('blueimp.fileupload', $.blueimp.fileupload, { |
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|
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options: { |
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// The regular expression for the types of images to load: |
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// matched against the file type: |
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loadImageFileTypes: /^image\/(gif|jpeg|png|svg\+xml)$/, |
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// The maximum file size of images to load: |
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loadImageMaxFileSize: 10000000, // 10MB |
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// The maximum width of resized images: |
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imageMaxWidth: 1920, |
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// The maximum height of resized images: |
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imageMaxHeight: 1080, |
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// Defines the image orientation (1-8) or takes the orientation |
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// value from Exif data if set to true: |
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imageOrientation: false, |
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// Define if resized images should be cropped or only scaled: |
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imageCrop: false, |
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// Disable the resize image functionality by default: |
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disableImageResize: true, |
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// The maximum width of the preview images: |
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previewMaxWidth: 80, |
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// The maximum height of the preview images: |
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previewMaxHeight: 80, |
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// Defines the preview orientation (1-8) or takes the orientation |
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// value from Exif data if set to true: |
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previewOrientation: true, |
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// Create the preview using the Exif data thumbnail: |
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previewThumbnail: true, |
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// Define if preview images should be cropped or only scaled: |
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previewCrop: false, |
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// Define if preview images should be resized as canvas elements: |
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previewCanvas: true |
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}, |
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|
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processActions: { |
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|
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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 the File API. |
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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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loadImage: function (data, options) { |
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if (options.disabled) { |
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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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dfd = $.Deferred(); |
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if (($.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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data.img = img; |
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} |
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dfd.resolveWith(that, [data]); |
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}, |
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options |
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)) { |
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return data; |
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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 image given as data.canvas or data.img |
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// and updates data.canvas or data.img with the resized image. |
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// Also stores the resized image as preview property. |
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// Accepts the options maxWidth, maxHeight, minWidth, |
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// minHeight, canvas and crop: |
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resizeImage: function (data, options) { |
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if (options.disabled || !(data.canvas || data.img)) { |
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return data; |
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} |
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options = $.extend({canvas: true}, options); |
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var that = this, |
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dfd = $.Deferred(), |
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img = (options.canvas && data.canvas) || data.img, |
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resolve = function (newImg) { |
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if (newImg && (newImg.width !== img.width || |
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newImg.height !== img.height || |
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options.forceResize)) { |
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data[newImg.getContext ? 'canvas' : 'img'] = newImg; |
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} |
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data.preview = newImg; |
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dfd.resolveWith(that, [data]); |
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}, |
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thumbnail; |
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if (data.exif) { |
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if (options.orientation === true) { |
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options.orientation = data.exif.get('Orientation'); |
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} |
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if (options.thumbnail) { |
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thumbnail = data.exif.get('Thumbnail'); |
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if (thumbnail) { |
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loadImage(thumbnail, resolve, options); |
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return dfd.promise(); |
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} |
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} |
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// Prevent orienting the same image twice: |
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if (data.orientation) { |
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delete options.orientation; |
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} else { |
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data.orientation = options.orientation; |
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} |
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} |
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if (img) { |
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resolve(loadImage.scale(img, options)); |
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return dfd.promise(); |
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} |
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return data; |
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}, |
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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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saveImage: function (data, options) { |
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if (!data.canvas || options.disabled) { |
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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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dfd = $.Deferred(); |
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if (data.canvas.toBlob) { |
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data.canvas.toBlob( |
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function (blob) { |
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if (!blob.name) { |
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if (file.type === blob.type) { |
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blob.name = file.name; |
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} else if (file.name) { |
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blob.name = file.name.replace( |
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/\.\w+$/, |
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'.' + blob.type.substr(6) |
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); |
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} |
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} |
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// Don't restore invalid meta data: |
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if (file.type !== blob.type) { |
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delete data.imageHead; |
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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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options.type || file.type, |
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options.quality |
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); |
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} else { |
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return data; |
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} |
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return dfd.promise(); |
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}, |
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|
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loadImageMetaData: function (data, options) { |
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if (options.disabled) { |
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return data; |
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} |
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var that = this, |
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dfd = $.Deferred(); |
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loadImage.parseMetaData(data.files[data.index], function (result) { |
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$.extend(data, result); |
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dfd.resolveWith(that, [data]); |
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}, options); |
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return dfd.promise(); |
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}, |
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|
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saveImageMetaData: function (data, options) { |
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if (!(data.imageHead && data.canvas && |
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data.canvas.toBlob && !options.disabled)) { |
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return data; |
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} |
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var file = data.files[data.index], |
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blob = new Blob([ |
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data.imageHead, |
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// Resized images always have a head size of 20 bytes, |
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// including the JPEG marker and a minimal JFIF header: |
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this._blobSlice.call(file, 20) |
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], {type: file.type}); |
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blob.name = file.name; |
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data.files[data.index] = blob; |
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return data; |
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}, |
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|
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// Sets the resized version of the image as a property of the |
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// file object, must be called after "saveImage": |
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setImage: function (data, options) { |
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if (data.preview && !options.disabled) { |
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data.files[data.index][options.name || 'preview'] = data.preview; |
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} |
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return data; |
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}, |
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|
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deleteImageReferences: function (data, options) { |
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if (!options.disabled) { |
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delete data.img; |
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delete data.canvas; |
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delete data.preview; |
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delete data.imageHead; |
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} |
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return data; |
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} |
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|
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} |
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|
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}); |
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|
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})); |
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|
