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/*******************************************************************************
* Copyright (c) 2005 QnX Software Systems 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:
* Qnx Software Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.preferences;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceConverter;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
import org.eclipse.ui.texteditor.AbstractTextEditor;
/**
* @deprecated Use {@link org.eclipse.cdt.internal.ui.editor.CSourceViewer} instead.
*/
class PreviewSourceViewer extends SourceViewer implements IPropertyChangeListener {
/**
* This viewer's foreground color.
*
* @since 3.0
*/
private Color fForegroundColor;
/**
* The viewer's background color.
*
* @since 3.0
*/
private Color fBackgroundColor;
/**
* This viewer's selection foreground color.
*
* @since 3.0
*/
private Color fSelectionForegroundColor;
/**
* The viewer's selection background color.
*
* @since 3.0
*/
private Color fSelectionBackgroundColor;
/**
* The preference store.
*
* @since 3.0
*/
private IPreferenceStore fPreferenceStore;
/**
* Is this source viewer configured?
*
* @since 3.0
*/
private boolean fIsConfigured;
public PreviewSourceViewer(Composite parent, int styles) {
super(parent, null, styles);
}
protected void initializeViewerColors() {
if (fPreferenceStore != null) {
StyledText styledText = getTextWidget();
// ----------- foreground color --------------------
Color color = fPreferenceStore
.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT) ? null
: createColor(fPreferenceStore,
AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND,
styledText.getDisplay());
styledText.setForeground(color);
if (fForegroundColor != null)
fForegroundColor.dispose();
fForegroundColor = color;
// ---------- background color ----------------------
color = fPreferenceStore
.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT) ? null
: createColor(fPreferenceStore,
AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND,
styledText.getDisplay());
styledText.setBackground(color);
if (fBackgroundColor != null)
fBackgroundColor.dispose();
fBackgroundColor = color;
// ----------- selection foreground color --------------------
color = fPreferenceStore
.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR) ? null
: createColor(
fPreferenceStore,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR,
styledText.getDisplay());
styledText.setSelectionForeground(color);
if (fSelectionForegroundColor != null)
fSelectionForegroundColor.dispose();
fSelectionForegroundColor = color;
// ---------- selection background color ----------------------
color = fPreferenceStore
.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR) ? null
: createColor(
fPreferenceStore,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR,
styledText.getDisplay());
styledText.setSelectionBackground(color);
if (fSelectionBackgroundColor != null)
fSelectionBackgroundColor.dispose();
fSelectionBackgroundColor = color;
}
}
/*
* @see ISourceViewer#configure(SourceViewerConfiguration)
*/
public void configure(SourceViewerConfiguration configuration) {
/*
* Prevent access to colors disposed in unconfigure(), see:
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=53641
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=86177
*/
StyledText textWidget = getTextWidget();
if (textWidget != null && !textWidget.isDisposed()) {
Color foregroundColor = textWidget.getForeground();
if (foregroundColor != null && foregroundColor.isDisposed())
textWidget.setForeground(null);
Color backgroundColor = textWidget.getBackground();
if (backgroundColor != null && backgroundColor.isDisposed())
textWidget.setBackground(null);
}
super.configure(configuration);
if (fPreferenceStore != null) {
fPreferenceStore.addPropertyChangeListener(this);
initializeViewerColors();
}
fIsConfigured = true;
}
/*
* @see org.eclipse.jface.text.source.ISourceViewerExtension2#unconfigure()
* @since 3.0
*/
public void unconfigure() {
if (fForegroundColor != null) {
fForegroundColor.dispose();
fForegroundColor = null;
}
if (fBackgroundColor != null) {
fBackgroundColor.dispose();
fBackgroundColor = null;
}
if (fPreferenceStore != null) {
fPreferenceStore.removePropertyChangeListener(this);
}
super.unconfigure();
fIsConfigured = false;
}
/**
* Creates a color from the information stored in the given preference
* store. Returns <code>null</code> if there is no such information
* available.
*
* @param store
* the store to read from
* @param key
* the key used for the lookup in the preference store
* @param display
* the display used create the color
* @return the created color according to the specification in the
* preference store
* @since 3.0
*/
private Color createColor(IPreferenceStore store, String key,
Display display) {
RGB rgb = null;
if (store.contains(key)) {
if (store.isDefault(key))
rgb = PreferenceConverter.getDefaultColor(store, key);
else
rgb = PreferenceConverter.getColor(store, key);
if (rgb != null)
return new Color(display, rgb);
}
return null;
}
/**
* Sets the preference store on this viewer.
*
* @param store
* the preference store
*
* @since 3.0
*/
public void setPreferenceStore(IPreferenceStore store) {
if (fIsConfigured && fPreferenceStore != null) {
fPreferenceStore.removePropertyChangeListener(this);
}
fPreferenceStore = store;
if (fIsConfigured && fPreferenceStore != null) {
fPreferenceStore.addPropertyChangeListener(this);
initializeViewerColors();
}
}
/*
* @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
*/
public void propertyChange(PropertyChangeEvent event) {
String property = event.getProperty();
if (AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND.equals(property)
|| AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT
.equals(property)
|| AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND
.equals(property)
|| AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT
.equals(property)
|| AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR
.equals(property)
|| AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR
.equals(property)
|| AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR
.equals(property)
|| AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR
.equals(property)) {
initializeViewerColors();
}
}
}
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