tinymce.PluginManager.add('gallery', function(editor, url) {

    editor.on("BeforeSetContent", function(e){
        //console.log(e);
        //e.content = e.content.replace('{{gallery:16}}', '<div class="alert alert-danger">GALERIJA</div>');
    });

    editor.addButton('gallery', {
        image: 'data:image/png;base64,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',
        tooltip: 'Gallery Browser',
        onclick: open_Browser
    });

    function open_Browser() {
        
        editor.windowManager.open({                
            title: 'Select Gallery',
            width: 500,
            height: 400,
            url: '/cp/gallery/tmce/plugin'
        });
    }
});