Merge pull request #2 from ckeditor/mermaid-firefox-toolbar-fix

Fixed toolbar not showing up in firefox.

src/mermaidediting.js

@@ -173,6 +173,17 @@ export default class MermaidEditing extends Plugin {
 
 			domElement.addEventListener( 'input', debouncedListener );
 
+			/* Workaround for internal #1544 */
+			domElement.addEventListener( 'focus', () => {
+				const model = editor.model;
+				const selectedElement = model.document.selection.getSelectedElement();
+
+				// Move the selection onto the mermaid widget if it's currently not selected.
+				if ( selectedElement !== data.item ) {
+					model.change( writer => writer.setSelection( data.item, 'on' ) );
+				}
+			}, true );
+
 			return domElement;
 		}
 
@@ -217,7 +228,6 @@ export default class MermaidEditing extends Plugin {
 				} else if ( child.name === 'div' && child.hasClass( 'ck-mermaid__preview' ) ) {
 					// @todo: we could optimize this and not refresh mermaid if widget is in source mode.
 					const domPreviewWrapper = domConverter.viewToDom( child, window.document );
-					// console.log( child, domPreviewWrapper );
 
 					if ( domPreviewWrapper ) {
 						domPreviewWrapper.innerHTML = newSource;