Added an "twig" lines mode, where the label lines are processed via a sandboxed twig.

public/ckeditor/plugins/partdb_label/plugin.js

@@ -83,6 +83,10 @@ function findLabelForPlaceholder(search)
     }
 }
 
+//Dont escape text inside of twig blocks
+CKEDITOR.config.protectedSource.push(/\{\{[\s\S]*?\}\}/g);
+CKEDITOR.config.protectedSource.push(/\{\%[\s\S]*?%\}/g);
+
 CKEDITOR.plugins.add('partdb_label', {
     hidpi: true,
     icons: 'placeholder',

public/ckeditor/plugins/showprotected/dialogs/protected.js

@@ -0,0 +1,52 @@
+
+CKEDITOR.dialog.add( 'showProtectedDialog', function( editor ) {
+
+	return {
+		title: 'Edit Protected Source',
+		minWidth: 300,
+		minHeight: 60,
+		onOk: function() {
+			var newSourceValue = this.getContentElement( 'info', 'txtProtectedSource' ).getValue();
+			
+			var encodedSourceValue = CKEDITOR.plugins.showprotected.encodeProtectedSource( newSourceValue );
+			
+			this._.selectedElement.setAttribute('data-cke-realelement', encodedSourceValue);
+			this._.selectedElement.setAttribute('title', newSourceValue);
+			this._.selectedElement.setAttribute('alt', newSourceValue);
+		},
+
+		onHide: function() {
+			delete this._.selectedElement;
+		},
+
+		onShow: function() {
+			this._.selectedElement = editor.getSelection().getSelectedElement();
+			
+			var decodedSourceValue = CKEDITOR.plugins.showprotected.decodeProtectedSource( this._.selectedElement.getAttribute('data-cke-realelement') );
+
+			this.setValueOf( 'info', 'txtProtectedSource', decodedSourceValue );
+		},
+		contents: [
+			{
+			id: 'info',
+			label: 'Edit Protected Source',
+			accessKey: 'I',
+			elements: [
+				{
+				type: 'text',
+				id: 'txtProtectedSource',
+				label: 'Value',
+				required: true,
+				validate: function() {
+					if ( !this.getValue() ) {
+						alert( 'The value cannot be empty' );
+						return false;
+					}
+					return true;
+				}
+			}
+			]
+		}
+		]
+	};
+} );

public/ckeditor/plugins/showprotected/plugin.js

@@ -0,0 +1,105 @@
+/*
+ *  "showprotected" CKEditor plugin
+ *  
+ *  Created by Matthew Lieder (https://github.com/IGx89)
+ *  
+ *  Licensed under the MIT, GPL, LGPL and MPL licenses
+ *  
+ *  Icon courtesy of famfamfam: http://www.famfamfam.com/lab/icons/mini/
+ */
+
+// TODO: configuration settings
+// TODO: show the actual text inline, not just an icon?
+// TODO: improve copy/paste behavior (tooltip is wrong after paste)
+
+CKEDITOR.plugins.add( 'showprotected', {
+	requires: 'dialog,fakeobjects',
+	onLoad: function() {
+		// Add the CSS styles for protected source placeholders.
+		var iconPath = CKEDITOR.getUrl( this.path + 'images' + '/code.gif' ),
+			baseStyle = 'background:url(' + iconPath + ') no-repeat %1 center;border:1px dotted #00f;background-size:16px;';
+
+		var template = '.%2 img.cke_protected' +
+			'{' +
+				baseStyle +
+				'width:16px;' +
+				'min-height:15px;' +
+				// The default line-height on IE.
+				'height:1.15em;' +
+				// Opera works better with "middle" (even if not perfect)
+				'vertical-align:' + ( CKEDITOR.env.opera ? 'middle' : 'text-bottom' ) + ';' +
+			'}';
+
+		// Styles with contents direction awareness.
+		function cssWithDir( dir ) {
+			return template.replace( /%1/g, dir == 'rtl' ? 'right' : 'left' ).replace( /%2/g, 'cke_contents_' + dir );
+		}
+
+		CKEDITOR.addCss( cssWithDir( 'ltr' ) + cssWithDir( 'rtl' ) );
+	},
+
+	init: function( editor ) {
+		CKEDITOR.dialog.add( 'showProtectedDialog', this.path + 'dialogs/protected.js' );
+		
+		editor.on( 'doubleclick', function( evt ) {
+			var element = evt.data.element;
+
+			if ( element.is( 'img' ) && element.hasClass( 'cke_protected' ) ) {
+				evt.data.dialog = 'showProtectedDialog';
+			}
+		} );
+	},
+
+	afterInit: function( editor ) {
+		// Register a filter to displaying placeholders after mode change.
+
+		var dataProcessor = editor.dataProcessor,
+			dataFilter = dataProcessor && dataProcessor.dataFilter;
+
+		if ( dataFilter ) {
+			dataFilter.addRules( {
+				comment: function( commentText, commentElement ) {
+					if(commentText.indexOf(CKEDITOR.plugins.showprotected.protectedSourceMarker) == 0) {
+						commentElement.attributes = [];
+						var fakeElement = editor.createFakeParserElement( commentElement, 'cke_protected', 'protected' );
+						
+						var cleanedCommentText = CKEDITOR.plugins.showprotected.decodeProtectedSource( commentText );
+						fakeElement.attributes.title = fakeElement.attributes.alt = cleanedCommentText;
+						
+						return fakeElement;
+					}
+					
+					return null;
+				}
+			} );
+		}
+	}
+} );
+
+/**
+ * Set of showprotected plugin's helpers.
+ *
+ * @class
+ * @singleton
+ */
+CKEDITOR.plugins.showprotected = {
+		
+	protectedSourceMarker: '{cke_protected}',
+		
+	decodeProtectedSource: function( protectedSource ) {
+		if(protectedSource.indexOf('%3C!--') == 0) {
+			return decodeURIComponent(protectedSource).replace( /<!--\{cke_protected\}([\s\S]+?)-->/g, function( match, data ) {
+                return decodeURIComponent( data );
+			} );
+		} else {
+			return decodeURIComponent(protectedSource.substr(CKEDITOR.plugins.showprotected.protectedSourceMarker.length));
+		}
+	},
+	
+	encodeProtectedSource: function( protectedSource ) {
+		return '<!--' + CKEDITOR.plugins.showprotected.protectedSourceMarker +
+        	encodeURIComponent( protectedSource ).replace( /--/g, '%2D%2D' ) +
+        	'-->';
+	}
+	
+};