phodal/congee

/* 
 Equation Editor Plugin for CKEditor v4
 Version 2.1

 This plugin allows equations to be created and edited from within CKEditor.
 For more information goto: http://www.codecogs.com/latex/integration/ckeditor_v4/install.php
 
 Copyright CodeCogs 2006-2013
 Written by Will Bateman.
*/
CKEDITOR.plugins.add( 'eqneditor', {
    availableLangs:{en:1},
    lang : "en",
    requires: [ 'dialog' ],
    icons: "eqneditor",
    
    init : function(editor)
    {        
      var host='latex.codecogs.com';
      var http=('https:' == document.location.protocol ? 'https://' : 'http://');
            
        // First make sure we have loaded the necessary scripts
      CKEDITOR.scriptLoader.load( [
        http+host+'/js/eq_config.js', 
        http+host+'/js/eq_editor-lite-18.js',
        ]);
        
        // Load Additional CSS 
        var fileref=document.createElement("link");
        fileref.setAttribute("rel", "stylesheet");
        fileref.setAttribute("type", "text/css");
        fileref.setAttribute("href", http+host+'/eqneditor/css/equation-embed.css');
        document.getElementsByTagName("head")[0].appendChild(fileref);
    
        var pluginCmd='eqneditorDialog';

        // Add the link and unlink buttons.
        editor.addCommand(pluginCmd, new CKEDITOR.dialogCommand(pluginCmd,
            {
                allowedContent: 'img[src,alt]',
                requiredContent: 'img[src,alt]'
            })
        );
        
        CKEDITOR.dialog.add(pluginCmd, this.path+"dialogs/eqneditor.js");
                
        editor.ui.addButton( 'EqnEditor', {
            label : editor.lang.eqneditor.toolbar,
            command : pluginCmd,
            icon: this.path + 'icons/eqneditor.png',
            toolbar: 'insert'
        });

        // add context-menu entry
        if (editor.contextMenu)
        {
            editor.addMenuGroup(editor.lang.eqneditor.menu);
            editor.addMenuItem( 'eqneditor', {
                label : editor.lang.eqneditor.edit,
                icon : this.path + 'icons/eqneditor.png',
                command : pluginCmd,
                group : editor.lang.eqneditor.menu
            });
            
            // if the selected item is image of class 'mathImg',
            // we shold be interested in it
            editor.contextMenu.addListener( function(element) {
                var res={};
                if (element.getAscendant('img', true))
                {
                    var sName = element.getAttribute('src').match( /(gif|svg)\.latex\?(.*)/ );
                    if(sName!=null)    
                    {
                        res['eqneditor'] = CKEDITOR.TRISTATE_OFF;
                        return res;
                    }
                }
            });
            
        }    
        
        editor.on( 'doubleclick', function(evt) 
        {
            var element = evt.data.element;
            if (element && element.is('img')) 
            {
                var sName = element.getAttribute('src').match( /(gif|svg)\.latex\?(.*)/ );
                if(sName!=null)
                {
                    evt.data.dialog = pluginCmd;
                    evt.cancelBubble = true; 
                    evt.returnValue = false;
                    evt.stop();    
                }
            }
        }, null, null, 1);
        
    }    
});