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/*******************************************************************************
* Copyright (c) 2007, 2011 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.internal;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.WhitespaceCharacterPainter;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.ui.editors.text.EditorsUI;
import org.eclipse.ui.texteditor.AbstractTextEditor;
public class ShowWhitespaceAction extends TextEditorPropertyAction {
private Map fPainters;
private boolean isWhitespaceShowing;
private boolean[] fNeedsPainters;
/** @since 3.7 */
private boolean fShowLeadingSpaces;
/** @since 3.7 */
private boolean fShowEnclosedSpaces;
/** @since 3.7 */
private boolean fShowTrailingSpaces;
/** @since 3.7 */
private boolean fShowLeadingIdeographicSpaces;
/** @since 3.7 */
private boolean fShowEnclosedIdeographicSpaces;
/** @since 3.7 */
private boolean fShowTrailingIdeographicSpace;
/** @since 3.7 */
private boolean fShowLeadingTabs;
/** @since 3.7 */
private boolean fShowEnclosedTabs;
/** @since 3.7 */
private boolean fShowTrailingTabs;
/** @since 3.7 */
private boolean fShowCarriageReturn;
/** @since 3.7 */
private boolean fShowLineFeed;
/** @since 3.7 */
private IPreferenceStore fStore = EditorsUI.getPreferenceStore();
/** @since 3.7 */
private int fAlpha;
public ShowWhitespaceAction(MergeSourceViewer[] viewers, boolean[] needsPainters) {
super(CompareMessages.ShowWhitespaceAction_0, viewers, AbstractTextEditor.PREFERENCE_SHOW_WHITESPACE_CHARACTERS);
fNeedsPainters = needsPainters;
synchronizeWithPreference();
}
/*
* (non-Javadoc)
* @see org.eclipse.compare.internal.TextEditorPropertyAction#synchronizeWithPreference()
*/
protected void synchronizeWithPreference() {
boolean checked = false;
if (fStore != null) {
checked = fStore.getBoolean(getPreferenceKey());
fShowLeadingSpaces = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_LEADING_SPACES);
fShowEnclosedSpaces = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_SPACES);
fShowTrailingSpaces = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_TRAILING_SPACES);
fShowLeadingIdeographicSpaces = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_LEADING_IDEOGRAPHIC_SPACES);
fShowEnclosedIdeographicSpaces = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_IDEOGRAPHIC_SPACES);
fShowTrailingIdeographicSpace = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_TRAILING_IDEOGRAPHIC_SPACES);
fShowLeadingTabs = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_LEADING_TABS);
fShowEnclosedTabs = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_TABS);
fShowTrailingTabs = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_TRAILING_TABS);
fShowCarriageReturn = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_CARRIAGE_RETURN);
fShowLineFeed = fStore.getBoolean(AbstractTextEditor.PREFERENCE_SHOW_LINE_FEED);
fAlpha = fStore.getInt(AbstractTextEditor.PREFERENCE_WHITESPACE_CHARACTER_ALPHA_VALUE);
}
if (checked != isChecked()) {
if (toggleState(checked))
setChecked(checked);
} else if (fNeedsPainters != null && checked) {
hideWhitespace();
showWhitespace();
}
}
/*
* (non-Javadoc)
* @see org.eclipse.compare.internal.TextEditorPropertyAction#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
*/
public void propertyChange(PropertyChangeEvent event) {
String property = event.getProperty();
if (property.equals(getPreferenceKey()) || AbstractTextEditor.PREFERENCE_SHOW_LEADING_SPACES.equals(property) || AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_SPACES.equals(property)
|| AbstractTextEditor.PREFERENCE_SHOW_TRAILING_SPACES.equals(property) || AbstractTextEditor.PREFERENCE_SHOW_LEADING_IDEOGRAPHIC_SPACES.equals(property)
|| AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_IDEOGRAPHIC_SPACES.equals(property) || AbstractTextEditor.PREFERENCE_SHOW_TRAILING_IDEOGRAPHIC_SPACES.equals(property)
|| AbstractTextEditor.PREFERENCE_SHOW_LEADING_TABS.equals(property) || AbstractTextEditor.PREFERENCE_SHOW_ENCLOSED_TABS.equals(property)
|| AbstractTextEditor.PREFERENCE_SHOW_TRAILING_TABS.equals(property) || AbstractTextEditor.PREFERENCE_SHOW_CARRIAGE_RETURN.equals(property)
|| AbstractTextEditor.PREFERENCE_SHOW_LINE_FEED.equals(property) || AbstractTextEditor.PREFERENCE_WHITESPACE_CHARACTER_ALPHA_VALUE.equals(property)) {
synchronizeWithPreference();
}
}
protected boolean toggleState(boolean checked) {
if (fNeedsPainters == null)
return false; // Not initialized yet
if (checked) {
showWhitespace();
} else {
hideWhitespace();
}
return true;
}
private synchronized Map getPainters() {
if (fPainters == null)
fPainters = new HashMap();
return fPainters;
}
private void showWhitespace() {
if (isWhitespaceShowing)
return;
try {
Map painters = getPainters();
MergeSourceViewer[] viewers = getViewers();
for (int i = 0; i < viewers.length; i++) {
if (fNeedsPainters[i]) {
MergeSourceViewer viewer = viewers[i];
SourceViewer sourceViewer = viewer.getSourceViewer();
WhitespaceCharacterPainter painter;
if (fStore != null) {
painter = new WhitespaceCharacterPainter(sourceViewer, fShowLeadingSpaces, fShowEnclosedSpaces, fShowTrailingSpaces, fShowLeadingIdeographicSpaces,
fShowEnclosedIdeographicSpaces, fShowTrailingIdeographicSpace, fShowLeadingTabs, fShowEnclosedTabs, fShowTrailingTabs, fShowCarriageReturn, fShowLineFeed, fAlpha);
} else {
painter = new WhitespaceCharacterPainter(sourceViewer);
}
sourceViewer.addPainter(painter);
painters.put(viewer, painter);
}
}
} finally {
isWhitespaceShowing = true;
}
}
private void hideWhitespace() {
Map painters = getPainters();
for (Iterator iterator = painters.keySet().iterator(); iterator.hasNext();) {
MergeSourceViewer viewer = (MergeSourceViewer) iterator.next();
WhitespaceCharacterPainter painter = (WhitespaceCharacterPainter)painters.get(viewer);
if (painter != null) {
viewer.getSourceViewer().removePainter(painter);
painter.deactivate(true);
}
}
painters.clear();
isWhitespaceShowing = false;
}
}
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