/*******************************************************************************
* Copyright (c) 2015 Bruno Medeiros and other Contributors.
* 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:
* Bruno Medeiros - initial API and implementation
*******************************************************************************/
package melnorme.lang.ide.ui.editor;
import static melnorme.utilbox.core.CoreUtil.listFrom;
import java.util.List;
import melnorme.util.swt.SWTUtil;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceConverter;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
import org.eclipse.ui.texteditor.AbstractTextEditor;
public class ViewerColorUpdater extends SourceViewerConfigurer {
private Color fForegroundColor;
private Color fBackgroundColor;
private Color fSelectionForegroundColor;
private Color fSelectionBackgroundColor;
public ViewerColorUpdater(IPreferenceStore prefStore, ProjectionViewerExt sourceViewer) {
super(prefStore, sourceViewer);
}
@Override
protected void doConfigureViewer() {
// ----------- foreground color --------------------
fForegroundColor = updateColorFromSetting(fForegroundColor,
AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT,
AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND);
styledText.setForeground(fForegroundColor);
// ---------- background color ----------------------
fBackgroundColor = updateColorFromSetting(fBackgroundColor,
AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT,
AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND);
styledText.setBackground(fBackgroundColor);
// ----------- selection foreground color --------------------
fSelectionForegroundColor = updateColorFromSetting(fSelectionForegroundColor,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR);
styledText.setSelectionForeground(fSelectionForegroundColor);
// ---------- selection background color ----------------------
fSelectionBackgroundColor = updateColorFromSetting(fSelectionBackgroundColor,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR);
styledText.setSelectionBackground(fSelectionBackgroundColor);
}
@Override
protected void doUnconfigureViewer() {
// Before we dispose colors, we must make sure styledText will no longer use them.
styledText.setForeground(null);
styledText.setBackground(null);
styledText.setSelectionForeground(null);
styledText.setSelectionBackground(null);
fForegroundColor = SWTUtil.dispose(fForegroundColor);
fBackgroundColor = SWTUtil.dispose(fBackgroundColor);
fSelectionForegroundColor = SWTUtil.dispose(fSelectionForegroundColor);
fSelectionBackgroundColor = SWTUtil.dispose(fSelectionBackgroundColor);
}
protected static final List<String> PROP_KEY_LIST = listFrom(
AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND,
AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT,
AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND,
AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_COLOR,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_FOREGROUND_DEFAULT_COLOR,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_COLOR,
AbstractDecoratedTextEditorPreferenceConstants.EDITOR_SELECTION_BACKGROUND_DEFAULT_COLOR
);
@Override
protected void handlePropertyChange(PropertyChangeEvent event) {
String property = event.getProperty();
if(PROP_KEY_LIST.contains(property)) {
doConfigureViewer();
}
}
protected Color updateColorFromSetting(Color currentOwnedColor, String prefKeyUseDefault, String prefKeyColorRgb) {
if(currentOwnedColor != null)
currentOwnedColor.dispose();
Display display = styledText.getDisplay();
return store.getBoolean(prefKeyUseDefault) ? null : createColor(store, prefKeyColorRgb, display);
}
protected 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;
}
}