(function() {
    // Do not load plugin language packs in moodle plugins.

    tinymce.create('tinymce.plugins.DragMathPlugin', {
        /**
         * Initializes the plugin, this will be executed after the plugin has been created.
         * This call is done before the editor instance has finished it's initialization so use the onInit event
         * of the editor instance to intercept that event.
         *
         * @param {tinymce.Editor} ed Editor instance that the plugin is initialized in.
         * @param {string} url Absolute URL to where the plugin is located.
         */
        init : function(ed, url) {
            // Register the command so that it can be invoked by using tinyMCE.activeEditor.execCommand('mceExample');
            lang = tinyMCE.activeEditor.getParam('language');

            ed.addCommand('mceDragMath', function() {
                ed.windowManager.open({

                    file : ed.getParam("moodle_plugin_base") + 'dragmath/dragmath.php?lang=' + lang,
                    width : 540,
                    height : 380,
                    inline : 1
                }, {
                    plugin_url : url, // Plugin absolute URL
                    some_custom_arg : 'custom arg' // Custom argument
                });
            });

            // Register example button.
            ed.addButton('dragmath', {
                title : 'dragmath.desc',
                cmd : 'mceDragMath',
                image : url + '/img/dragmath.png'
            });


            // Add a node change handler, selects the button in the UI when a image is selected.
            ed.onNodeChange.add(function(ed, cm, n) {
                cm.setActive('dragmath', n.nodeName == 'IMG');
            });
        },

        /**
         * Creates control instances based in the incomming name. This method is normally not
         * needed since the addButton method of the tinymce.Editor class is a more easy way of adding buttons
         * but you sometimes need to create more complex controls like listboxes, split buttons etc then this
         * method can be used to create those.
         *
         * @param {String} n Name of the control to create.
         * @param {tinymce.ControlManager} cm Control manager to use inorder to create new control.
         * @return {tinymce.ui.Control} New control instance or null if no control was created.
         */
        createControl : function(n, cm) {
            return null;
        },

        /**
         * Returns information about the plugin as a name/value array.
         * The current keys are longname, author, authorurl, infourl and version.
         *
         * @return {Object} Name/value array containing information about the plugin.
         */
        getInfo : function() {
            return {
                longname : 'Moodle Dragmath plugin',
                author : 'Glen Davies',
                authorurl : 'http://www.canterbury.ac.nz',
                infourl : 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/example',
                version : "1.0"
            };
        }
    });

    // Register plugin.
    tinymce.PluginManager.add('dragmath', tinymce.plugins.DragMathPlugin);
})();