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