dokuwiki-plugin-imgpaste/jquery.paste_image_reader.js

/**
 * Image paste Event handler
 *
 * @author  STRd6
 * @license MIT License
 * @link    http://strd6.com/2011/09/html5-javascript-pasting-image-data-in-chrome/
 */
(function ($) {
    var defaults;
    $.event.fix = (function (originalFix) {
        return function (event) {
            event = originalFix.apply(this, arguments);
            if (event.type.indexOf('copy') === 0 || event.type.indexOf('paste') === 0) {
                event.clipboardData = event.originalEvent.clipboardData;
            }
            return event;
        };
    })($.event.fix);

    defaults = {
        callback: $.noop,
        matchType: /image.*/
    };

    return $.fn.pasteImageReader = function (options) {
        if (typeof options === "function") {
            options = {
                callback: options
            };
        }
        options = $.extend({}, defaults, options);
        return this.each(function () {
            var $this, element;
            element = this;
            $this = $(this);
            return $this.bind('paste', function (event) {
                var clipboardData, found;
                found = false;
                clipboardData = event.clipboardData;
                if(typeof clipboardData === 'undefined') return;
                return Array.prototype.forEach.call(clipboardData.types, function (type, i) {
                    var file, reader;
                    if (found) {
                        return;
                    }
                    if (type.match(options.matchType) || clipboardData.items[i].type.match(options.matchType)) {
                        file = clipboardData.items[i].getAsFile();
                        reader = new FileReader();
                        reader.onload = function (evt) {
                            return options.callback.call(element, {
                                dataURL: evt.target.result,
                                event: evt,
                                file: file,
                                name: file.name
                            });
                        };
                        reader.readAsDataURL(file);
                        return found = true;
                    }
                });
            });
        });
    };
})(jQuery);