Rock.Web.UI.Controls.MergeFieldPicker.RenderControl C# (CSharp) Method

        public override void RenderControl( HtmlTextWriter writer )
        {
            ItemRestUrlExtraParams = "?additionalFields=" + HttpUtility.UrlPathEncode(MergeFields.AsDelimited( "," ));
            base.RenderControl( writer );
        }

        /// <summary>
        /// Renders the base control.
        /// </summary>
        /// <param name="writer">The writer.</param>
        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);
        }