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/*******************************************************************************
* Copyright (c) 2014-2019 Google, Inc and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* - Sergey Prigogin (Google) - initial API and implementation
* - Mickael Istria (Red Hat Inc.) - [Bug 544708] Ctrl+Home
*******************************************************************************/
package org.eclipse.jface.text.tests;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.concurrent.atomic.AtomicBoolean;
import org.junit.Assume;
import org.junit.Rule;
import org.junit.Test;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.jface.util.Util;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.jface.text.tests.util.DisplayHelper;
/**
* Basic tests for TextViewer.
*/
public class TextViewerTest {
@Rule public ScreenshotOnFailureRule screenshotRule = new ScreenshotOnFailureRule();
@Test
public void testSetRedraw_Bug441827() throws Exception {
Shell shell= new Shell();
try {
TextViewer textViewer= new TextViewer(shell, SWT.NONE);
Document document= new Document("abc");
textViewer.setDocument(document);
int len= document.getLength();
// Select the whole document with the caret at the beginning.
textViewer.setSelectedRange(len, -len);
assertEquals(0, textViewer.getSelectedRange().x);
assertEquals(len, textViewer.getSelectedRange().y);
assertEquals(0, textViewer.getTextWidget().getCaretOffset());
textViewer.setRedraw(false);
textViewer.setRedraw(true);
// Check that the selection and the caret position are preserved.
assertEquals(0, textViewer.getSelectedRange().x);
assertEquals(len, textViewer.getSelectedRange().y);
assertEquals(0, textViewer.getTextWidget().getCaretOffset());
} finally {
shell.dispose();
}
}
@Test
public void testCtrlHomeViewportListener() {
Assume.assumeFalse("See bug 541415. For whatever reason, this shortcut doesn't work on Mac", Util.isMac());
Shell shell= new Shell();
try {
shell.setLayout(new FillLayout());
shell.setSize(500, 200);
SourceViewer textViewer= new SourceViewer(shell, null, SWT.NONE);
textViewer.setDocument(new Document(generate5000Lines()));
shell.open();
textViewer.revealRange(4000, 1);
AtomicBoolean notifyHomeReached = new AtomicBoolean();
ctrlEnd(textViewer);
DisplayHelper.sleep(textViewer.getTextWidget().getDisplay(), 1000);
textViewer.addViewportListener(offset -> notifyHomeReached.set(offset == 0));
ctrlHome(textViewer);
assertTrue(new DisplayHelper() {
@Override
protected boolean condition() {
return notifyHomeReached.get();
}
}.waitForCondition(textViewer.getTextWidget().getDisplay(), 3000));
} finally {
shell.dispose();
}
}
@Test
public void testCtrlEndViewportListener() {
Assume.assumeFalse("See bug 541415. For whatever reason, this shortcut doesn't work on Mac", Util.isMac());
Shell shell= new Shell();
try {
shell.setLayout(new FillLayout());
shell.setSize(500, 200);
SourceViewer textViewer= new SourceViewer(shell, null, SWT.NONE);
Document document= new Document(generate5000Lines());
textViewer.setDocument(document);
shell.open();
AtomicBoolean notifyEndReached = new AtomicBoolean();
textViewer.addViewportListener(offset ->
notifyEndReached.set(offset > 4000));
ctrlEnd(textViewer);
assertTrue(new DisplayHelper() {
@Override
protected boolean condition() {
return notifyEndReached.get();
}
}.waitForCondition(textViewer.getControl().getDisplay(), 3000));
} finally {
shell.dispose();
}
}
public static void ctrlEnd(ITextViewer viewer) {
postKeyEvent(viewer.getTextWidget(), SWT.END, SWT.CTRL, SWT.KeyDown);
}
public static void ctrlHome(ITextViewer viewer) {
postKeyEvent(viewer.getTextWidget(), SWT.HOME, SWT.CTRL, SWT.KeyDown);
}
private static void postKeyEvent(Control widget, int keyCode, int stateMask, int type) {
Display display= widget.getDisplay();
widget.setFocus();
DisplayHelper.driveEventQueue(display);
Event event = new Event();
event.widget = widget;
event.keyCode = keyCode;
event.stateMask = stateMask;
event.type = type;
event.doit = true;
// display.post(event) seem not always work, see bug 541415
Listener[] listeners= widget.getListeners(type);
for (Listener listener : listeners) {
listener.handleEvent(event);
}
DisplayHelper.driveEventQueue(display);
}
public static String generate5000Lines() {
StringBuilder b = new StringBuilder("start");
for (int i = 0; i < 5000; i++) {
b.append('\n');
}
b.append("end");
return b.toString();
}
}
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