| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.text; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.dltk.ui.text.IColorManager; |
| import org.eclipse.dltk.ui.text.IColorManagerExtension; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.RGB; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * DLTK color manager. |
| */ |
| public class DLTKColorManager implements IColorManager, IColorManagerExtension { |
| |
| protected Map<String, RGB> fKeyTable = new HashMap<>(10); |
| protected Map<Display, Map<RGB, Color>> fDisplayTable = new HashMap<>(2); |
| |
| /** |
| * Flag which tells if the colors are automatically disposed when the |
| * current display gets disposed. |
| */ |
| private boolean fAutoDisposeOnDisplayDispose; |
| |
| /** |
| * Creates a new DLTK color manager which automatically disposes the |
| * allocated colors when the current display gets disposed. |
| */ |
| public DLTKColorManager() { |
| this(true); |
| } |
| |
| /** |
| * Creates a new DLTK color manager. |
| * |
| * @param autoDisposeOnDisplayDispose |
| * if <code>true</code> the color manager automatically disposes |
| * all managed colors when the current display gets disposed and |
| * all calls to |
| * {@link org.eclipse.jface.text.source.ISharedTextColors#dispose()} |
| * are ignored. |
| * |
| * |
| */ |
| public DLTKColorManager(boolean autoDisposeOnDisplayDispose) { |
| fAutoDisposeOnDisplayDispose = autoDisposeOnDisplayDispose; |
| } |
| |
| public void dispose(Display display) { |
| Map<RGB, Color> colorTable = fDisplayTable.get(display); |
| if (colorTable != null) { |
| Iterator<Color> e = colorTable.values().iterator(); |
| while (e.hasNext()) { |
| Color color = e.next(); |
| if (color != null && !color.isDisposed()) |
| color.dispose(); |
| } |
| } |
| } |
| |
| @Override |
| public Color getColor(RGB rgb) { |
| |
| if (rgb == null) |
| return null; |
| |
| final Display display = Display.getCurrent(); |
| Map<RGB, Color> colorTable = fDisplayTable.get(display); |
| if (colorTable == null) { |
| colorTable = new HashMap<>(10); |
| fDisplayTable.put(display, colorTable); |
| if (fAutoDisposeOnDisplayDispose) { |
| display.disposeExec(() -> dispose(display)); |
| } |
| } |
| |
| Color color = colorTable.get(rgb); |
| if (color == null) { |
| color = new Color(Display.getCurrent(), rgb); |
| colorTable.put(rgb, color); |
| } |
| |
| return color; |
| } |
| |
| @Override |
| public void dispose() { |
| if (!fAutoDisposeOnDisplayDispose) |
| dispose(Display.getCurrent()); |
| } |
| |
| @Override |
| public Color getColor(String key) { |
| |
| if (key == null) |
| return null; |
| |
| RGB rgb = fKeyTable.get(key); |
| return getColor(rgb); |
| } |
| |
| @Override |
| public void bindColor(String key, RGB rgb) { |
| Object value = fKeyTable.get(key); |
| if (value != null) |
| throw new UnsupportedOperationException(); |
| |
| fKeyTable.put(key, rgb); |
| } |
| |
| @Override |
| public void unbindColor(String key) { |
| fKeyTable.remove(key); |
| } |
| } |