Rock.Web.UI.Controls.CodeEditor.RenderBaseControl C# (CSharp) Method

        public void RenderBaseControl( HtmlTextWriter writer )
        {
            int editorHeight = EditorHeight.AsIntegerOrNull() ?? 200;

            // Add merge field help
            if ( MergeFields.Any() )
            {
                writer.Write( "<div class='codeeditor-header margin-b-md clearfix'>" );
                _mfpMergeFields.RenderControl( writer );
                writer.Write( "</div>" );

                editorHeight = editorHeight - 40;
            }

            // add editor div
            string customDiv = @"<div class='code-editor-container' style='position:relative; height: {0}px'><pre id='codeeditor-div-{1}'>{2}</pre></div>";
            writer.Write( string.Format( customDiv, editorHeight, this.ClientID, HttpUtility.HtmlEncode( this.Text ) ) );

            // write custom css for the code editor
            string customStyle = @"
                <style type='text/css' media='screen'>
                    #codeeditor-div-{0} {{
                        position: absolute;
                        top: 0;
                        right: 0;
                        bottom: 0;
                        left: 0;
                    }}
                </style>
            ";
            string cssCode = string.Format( customStyle, this.ClientID );
            writer.Write( cssCode );

            // make textbox hidden
            ( (WebControl)this ).Style.Add( HtmlTextWriterStyle.Display, "none" );

            // add ace.js on demand only when there will be a codeeditor rendered
            if ( ScriptManager.GetCurrent( this.Page ).IsInAsyncPostBack )
            {
                ScriptManager.RegisterClientScriptInclude( this.Page, this.Page.GetType(), "ace-include", ResolveUrl( "~/Scripts/ace/ace.js" ) );
            }

            string scriptFormat = @"
                var ce_{0} = ace.edit('codeeditor-div-{0}');
                ce_{0}.setTheme('ace/theme/{1}');
                ce_{0}.getSession().setMode('ace/mode/{2}');
                ce_{0}.setShowPrintMargin(false);

                document.getElementById('{0}').value = $('<div/>').text( ce_{0}.getValue() ).html().replace(/&#39/g,""&apos"");
                ce_{0}.getSession().on('change', function(e) {{
                    document.getElementById('{0}').value = $('<div/>').text( ce_{0}.getValue() ).html().replace(/&#39/g,""&apos"");
                    {3}
                }});
            ";

            string script = string.Format( scriptFormat, this.ClientID, EditorThemeAsString( this.EditorTheme ), EditorModeAsString( this.EditorMode ), this.OnChangeScript );
            ScriptManager.RegisterStartupScript( this, this.GetType(), "codeeditor_" + this.ClientID, script, true );

            base.RenderControl( writer );
        }