jquery.fileupload-image-editor.js 中actions.resizeImage

https://github.com/ChuckForkJS/jQuery-File-Upload/blob/master/js/jquery.fileupload-image-editor.js

actions.resizeImage(data, resizeOptions).then(function () {
                        var imageOptions = { imagePreviewName: options.imagePreviewName };
                        actions.setImage(data, imageOptions);
                        actions.deleteImageReferences(data, {});

                        // Replace preview image
                        data.context.find('.preview').each(function (index, elm) {
                            $(elm).empty();
                            $(elm).append(data.files[index].preview);
                        });
                        data.context.find('.size').text(
                            thiz._formatFileSize(data.files[0].size)
                        );
                        data.context.find('.name').text(
                            data.files[0].name
                        );

                        $editor.modal('hide');
                    });

先触发了jquery.fileupload-image.js中的resizeImage方法

// 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;
            },