feat: replace manual config textarea with CodeMirror JSON editor

Initialize CodeMirror on the manual configuration textarea with syntax highlighting, line numbers, bracket matching, and auto-close brackets

Closes #509

Author: HardeepAsrani

classes/Visualizer/Module/Chart.php

@@ -853,6 +853,7 @@ private function _handleDataAndSettingsPage() {
 		wp_enqueue_script( 'visualizer-preview' );
 		wp_enqueue_script( 'visualizer-chosen' );
 		wp_enqueue_script( 'visualizer-render' );
+		wp_enqueue_code_editor( array( 'type' => 'application/json' ) );
 
 		if ( Visualizer_Module::can_show_feature( 'simple-editor' ) ) {
 			wp_enqueue_script( 'visualizer-editor-simple' );

classes/Visualizer/Render/Sidebar.php

@@ -142,7 +142,7 @@ protected function _renderManualConfigDescription() {
 			self::_renderSectionDescription(
 				'<span class="viz-gvlink">' . sprintf(
 				// translators: %1$s - HTML link tag, %2$s - HTML closing link tag, %3$s - HTML link tag, %4$s - HTML closing link tag.
-					__( 'Configure the graph by providing configuration variables right from the %1$sGoogle Visualization API%2$s. You can refer to to some examples %3$shere%4$s.', 'visualizer' ), '<a href="https://developers.google.com/chart/interactive/docs/gallery/?#configuration-options" target="_blank">',
+					__( 'Configure the graph by providing configuration variables right from the %1$sGoogle Visualization API%2$s. You can refer to %3$sCommon Snippets%4$s for examples.', 'visualizer' ), '<a href="https://developers.google.com/chart/interactive/docs/gallery/?#configuration-options" target="_blank">',
 					'</a>',
 					'<a href="https://docs.themeisle.com/article/728-manual-configuration" target="_blank">',
 					'</a>'

classes/Visualizer/Render/Sidebar/ChartJS.php

@@ -390,7 +390,7 @@ protected function _renderManualConfigDescription() {
 			self::_renderSectionDescription(
 				'<span class="viz-gvlink">' . sprintf(
 					// translators: %1$s - HTML link tag, %2$s - HTML closing link tag, %3$s - HTML link tag, %4$s - HTML closing link tag.
-					__( 'Configure the graph by providing configuration variables right from the %1$sChartJS API%2$s. You can refer to to some examples %3$shere%4$s.', 'visualizer' ),
+					__( 'Configure the graph by providing configuration variables right from the %1$sChartJS API%2$s. You can refer to %3$sCommon Snippets%4$s for examples.', 'visualizer' ),
 					'<a href="https://www.chartjs.org/docs/latest/configuration/" target="_blank">',
 					'</a>',
 					'<a href="https://docs.themeisle.com/article/728-manual-configuration" target="_blank">',

css/frame.css

@@ -1481,6 +1481,61 @@ span.viz-section-error {
 }
 
 
+/******************************************************************************/
+/************************  manual config JSON editor  *************************/
+/******************************************************************************/
+textarea[name="manual"] + .CodeMirror {
+	background: #282923;
+	color: #f8f8f2;
+	border-radius: 4px;
+	height: 200px;
+	font-size: 13px;
+}
+
+textarea[name="manual"] + .CodeMirror .CodeMirror-scroll {
+	min-height: 200px;
+}
+
+textarea[name="manual"] + .CodeMirror .CodeMirror-gutters {
+	background: #1e1f1c;
+	border-right: 1px solid #404040;
+	color: #75715e;
+}
+
+textarea[name="manual"] + .CodeMirror .CodeMirror-linenumber {
+	color: #75715e;
+}
+
+textarea[name="manual"] + .CodeMirror .CodeMirror-cursor {
+	border-left: 1px solid #f8f8f0;
+}
+
+textarea[name="manual"] + .CodeMirror .CodeMirror-selected {
+	background: #49483e;
+}
+
+textarea[name="manual"] + .CodeMirror pre.CodeMirror-line,
+textarea[name="manual"] + .CodeMirror pre.CodeMirror-line-like {
+	color: #f8f8f2;
+}
+
+textarea[name="manual"] + .CodeMirror .cm-string {
+	color: #A9DC76;
+}
+
+textarea[name="manual"] + .CodeMirror .cm-number {
+	color: #AB9DF2;
+}
+
+textarea[name="manual"] + .CodeMirror .cm-atom {
+	color: #78DCE8;
+}
+
+textarea[name="manual"] + .CodeMirror .cm-punctuation,
+textarea[name="manual"] + .CodeMirror .cm-bracket {
+	color: #f8f8f2;
+}
+
 /******************************************************************************/
 /********************************  data tables  *******************************/
 /******************************************************************************/

js/preview.js

@@ -2,6 +2,7 @@
 /* global console */
 /* global vizSettingsHaveChanged */
 /* global vizHaveSettingsChanged */
+/* global wp */
 
 (function($, v) {
 	var timeout;
@@ -22,6 +23,7 @@
                 clear: updateChart
             });
             $('#settings-form textarea[name="manual"]').change(validateJSON).keyup(validateJSON);
+            initManualConfigEditor();
             vizSettingsHaveChanged(false);
         };
 
@@ -173,19 +175,50 @@
         function validateJSON() {
             $('#visualizer-error-manual').remove();
             try{
-                var options = JSON.parse($(this).val());
+                JSON.parse($(this).val());
             }catch(error){
-                $('<div class="visualizer-error" id="visualizer-error-manual">Invalid JSON: ' + error + '</div>').insertAfter($(this));
+                var $after = $(this).next('.CodeMirror').length ? $(this).next('.CodeMirror') : $(this);
+                $('<div class="visualizer-error" id="visualizer-error-manual">Invalid JSON: ' + error + '</div>').insertAfter($after);
             }
         }
 
+        function initManualConfigEditor() {
+            var $textarea = $('textarea[name="manual"]');
+            if (!$textarea.length || $textarea.data('cm-initialized')) return;
+
+            var CodeMirrorLib = (typeof wp !== 'undefined' && wp.CodeMirror) ? wp.CodeMirror : null;
+            if (!CodeMirrorLib) return;
+
+            $textarea.data('cm-initialized', true);
+
+            var cm = CodeMirrorLib.fromTextArea($textarea.get(0), {
+                mode: 'application/json',
+                lineNumbers: true,
+                lineWrapping: true,
+                matchBrackets: true,
+                autoCloseBrackets: true
+            });
+
+            // Refresh when any sidebar group is expanded so line numbers render correctly
+            // (CodeMirror can't measure gutter width while the container is hidden).
+            $(document).on('click.vizManualConfig', '.viz-group-title', function() {
+                setTimeout(function() { cm.refresh(); }, 50);
+            });
+
+            cm.on('change', function() {
+                cm.save();
+                $textarea.trigger('change');
+            });
+        }
+
 		$('.control-text').change(updateChart).keyup(updateChart);
 		$('.control-select, .control-checkbox, .control-check').change(updateChart);
 		$('.color-picker-hex').wpColorPicker({
 			change: updateChart,
 			clear: updateChart
 		});
 		$('textarea[name="manual"]').change(validateJSON).keyup(validateJSON);
+        initManualConfigEditor();
 
 	});
 })(jQuery, visualizer);