1 /*******************************************************************************
2  * Copyright (c) 2000, 2008 IBM Corporation and others.
3  *
4  * This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License 2.0
6  * which accompanies this distribution, and is available at
7  * https://www.eclipse.org/legal/epl-2.0/
8  *
9  * SPDX-License-Identifier: EPL-2.0
10  *
11  * Contributors:
12  *     IBM Corporation - initial API and implementation
13  *******************************************************************************/
14 package org.eclipse.ui.examples.javaeditor;
15 
16 
17 import org.eclipse.ui.texteditor.ITextEditor;
18 import org.eclipse.ui.texteditor.TextEditorAction;
19 
20 /**
21  * A toolbar action which toggles the presentation model of the
22  * connected text editor. The editor shows either the highlight range
23  * only or always the whole document.
24  */
25 public class PresentationAction extends TextEditorAction {
26 
27 	/**
28 	 * Constructs and updates the action.
29 	 */
PresentationAction()30 	public PresentationAction() {
31 		super(JavaEditorMessages.getResourceBundle(), "TogglePresentation.", null); //$NON-NLS-1$
32 		update();
33 	}
34 
35 	@Override
run()36 	public void run() {
37 
38 		ITextEditor editor= getTextEditor();
39 
40 		editor.resetHighlightRange();
41 		boolean show= editor.showsHighlightRangeOnly();
42 		setChecked(!show);
43 		editor.showHighlightRangeOnly(!show);
44 	}
45 
46 	@Override
update()47 	public void update() {
48 		setChecked(getTextEditor() != null && getTextEditor().showsHighlightRangeOnly());
49 		setEnabled(true);
50 	}
51 }
52