/*******************************************************************************
* Copyright (c) 2015, 2017 Tasktop Technologies and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Tasktop Technologies - initial API and implementation
* Ralf M Petter<ralf.petter@gmail.com> - Bug 510241
*******************************************************************************/
package org.eclipse.ui.tests.forms.util;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import java.lang.reflect.Field;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.forms.widgets.ImageHyperlink;
import org.eclipse.ui.internal.forms.widgets.FormImages;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class ImageHyperlinkTest {
private Display display;
private Shell shell;
private GC gc;
private TestImageHyperlink imageHyperlink;
@Before
public void setUp() throws Exception {
display = PlatformUI.getWorkbench().getDisplay();
shell = new Shell(display);
shell.setSize(400, 300);
shell.setLayout(new FillLayout());
shell.open();
Composite composite = new Composite(shell, SWT.V_SCROLL);
imageHyperlink = new TestImageHyperlink(composite, SWT.NULL);
gc = new GC(display);
}
@After
public void tearDown() throws Exception {
shell.dispose();
gc.dispose();
}
@Test
public void testNoImageOnCreation() throws Exception {
assertNull(imageHyperlink.getImage());
assertNull(getDisabledImage(imageHyperlink));
}
@Test
public void testSetImageDoesNotCreateDisabledImage() throws Exception {
Image image = createGradient();
imageHyperlink.setImage(image);
assertNotNull(imageHyperlink.getImage());
assertNull(getDisabledImage(imageHyperlink));
}
@Test
public void testCreateDisabledImageOnPaint() throws Exception {
Image image = createGradient();
imageHyperlink.setImage(image);
imageHyperlink.paintHyperlink(gc);
assertNotNull(imageHyperlink.getImage());
assertNull(getDisabledImage(imageHyperlink));
}
@Test
public void testCreateDisabledImageOnPaintWhenDisabled() throws Exception {
Image image = createGradient();
imageHyperlink.setImage(image);
imageHyperlink.setEnabled(false);
imageHyperlink.paintHyperlink(gc);
assertNotNull(imageHyperlink.getImage());
assertNotNull(getDisabledImage(imageHyperlink));
}
@Test
public void testSetImageDisposesPreviousDisabledImage() throws Exception {
Image prevImage = createGradient();
imageHyperlink.setImage(prevImage);
imageHyperlink.setEnabled(false);
imageHyperlink.paintHyperlink(gc);
Image prevDisabledImage = getDisabledImage(imageHyperlink);
assertFalse(prevDisabledImage.isDisposed());
Image image = createGradient();
imageHyperlink.setImage(image);
assertTrue(prevDisabledImage.isDisposed());
}
@Test
public void testPaintHyperlinkDoesNotLeakDisabledImage() throws Exception {
Image prevImage = createGradient();
imageHyperlink.setImage(prevImage);
imageHyperlink.setEnabled(false);
imageHyperlink.paintHyperlink(gc);
Image prevDisabledImage = getDisabledImage(imageHyperlink);
imageHyperlink.paintHyperlink(gc);
assertSame(prevDisabledImage, getDisabledImage(imageHyperlink));
}
@Test
public void testSetImageNullClearsDisabledImage() throws Exception {
Image image = createGradient();
imageHyperlink.setImage(image);
imageHyperlink.setEnabled(false);
imageHyperlink.paintHyperlink(gc);
assertNotNull(getDisabledImage(imageHyperlink));
imageHyperlink.setImage(null);
assertNull(getDisabledImage(imageHyperlink));
}
private Image createGradient() {
return FormImages.getInstance().getGradient(new Color(display, 0, 0, 0), new Color(display, 100, 100, 100), 1,
1, 1, display);
}
private static Image getDisabledImage(ImageHyperlink link) throws Exception {
Field f = ImageHyperlink.class.getDeclaredField("disabledImage");
f.setAccessible(true);
return (Image) f.get(link);
}
private class TestImageHyperlink extends ImageHyperlink {
public TestImageHyperlink(Composite parent, int style) {
super(parent, style);
}
@Override
public void paintHyperlink(GC gc) {
super.paintHyperlink(gc);
}
}
}