core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/text/HTMLUtils.java

/*******************************************************************************
 * Copyright (c) 2008, 2018 xored software, Inc. 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:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.ui.text;

import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;

public class HTMLUtils {

	private static RGB BG_COLOR_RGB = null;
	private static RGB FG_COLOR_RGB = new RGB(0, 0, 0);

	static {
		final Display display = Display.getDefault();
		if (display != null && !display.isDisposed()) {
			try {
				display.asyncExec(() -> {
					BG_COLOR_RGB = display
							.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
					FG_COLOR_RGB = display
							.getSystemColor(SWT.COLOR_INFO_FOREGROUND).getRGB();
				});
			} catch (SWTError err) {
				// see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
				if (err.code != SWT.ERROR_DEVICE_DISPOSED)
					throw err;
			}
		}
	}

	public static RGB getBgColor() {
		if (BG_COLOR_RGB != null) {
			return BG_COLOR_RGB;
		}
		// RGB value of info bg color on WindowsXP
		return new RGB(255, 255, 225);
	}

	/**
	 * @since 3.0
	 */
	public static RGB getFgColor() {
		return FG_COLOR_RGB;
	}
}