| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.editors.text; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.RGB; |
| import org.eclipse.swt.widgets.Display; |
| |
| import org.eclipse.jface.text.source.ISharedTextColors; |
| |
| /* |
| * @see org.eclipse.jface.text.source.ISharedTextColors |
| * @since 2.1 |
| */ |
| class SharedTextColors implements ISharedTextColors { |
| |
| /** The display table. */ |
| private Map<Display, Map<RGB, Color>> fDisplayTable; |
| |
| /** Creates an returns a shared color manager. */ |
| public SharedTextColors() { |
| super(); |
| } |
| |
| @Override |
| public Color getColor(RGB rgb) { |
| if (rgb == null) |
| return null; |
| |
| if (fDisplayTable == null) |
| fDisplayTable= new HashMap<>(2); |
| |
| final Display display= Display.getCurrent(); |
| |
| Map<RGB, Color> colorTable= fDisplayTable.get(display); |
| if (colorTable == null) { |
| colorTable= new HashMap<>(10); |
| fDisplayTable.put(display, colorTable); |
| display.disposeExec(() -> dispose(display)); |
| } |
| |
| Color color= colorTable.get(rgb); |
| if (color == null) { |
| color= new Color(display, rgb); |
| colorTable.put(rgb, color); |
| } |
| |
| return color; |
| } |
| |
| @Override |
| public void dispose() { |
| if (fDisplayTable == null) |
| return; |
| |
| Iterator<Map<RGB, Color>> iter= fDisplayTable.values().iterator(); |
| while (iter.hasNext()) |
| dispose(iter.next()); |
| fDisplayTable= null; |
| } |
| |
| /** |
| * Disposes the colors for the given display. |
| * |
| * @param display the display for which to dispose the colors |
| * @since 3.3 |
| */ |
| private void dispose(Display display) { |
| if (fDisplayTable != null) |
| dispose(fDisplayTable.remove(display)); |
| } |
| |
| /** |
| * Disposes the given color table. |
| * |
| * @param colorTable the color table that maps <code>RGB</code> to <code>Color</code> |
| * @since 3.3 |
| */ |
| private void dispose(Map<RGB, Color> colorTable) { |
| if (colorTable != null) { |
| colorTable.clear(); |
| } |
| } |
| |
| } |