Bug 25458 [Font] DBCS support: new SWT API
Last Friday we have included a new API in Font: public Font(Device device, FontData[] fds) { In order to have a more appropriate behavior on DBCS platforms Eclipse/UI should start using this API. Anyway, the best police still is never change the default font in the widget if you don't need to. (this new API is going to make difference in Eclipse/Motif only)
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/FontRegistry.java
* Read the resource bundle at location. Look for a file with the
 * extension _os_ws first, then _os then just the name.
 * @param location - String - the location of the file.
 */
private void readResourceBundle(String location, ClassLoader loader) {
	String osname = System.getProperty("os.name").trim();
	String wsname = SWT.getPlatform();
	osname = StringConverter.removeWhiteSpaces(osname).toLowerCase();
	wsname = StringConverter.removeWhiteSpaces(wsname).toLowerCase();
	String OSLocation = location;
	String WSLocation = location;
	ResourceBundle bundle = null;
	if (osname != null){
		OSLocation = location + "_" + osname;
		if (wsname != null)
			WSLocation = OSLocation + "_" + wsname;
	}
	
	try{
		bundle = ResourceBundle.getBundle(WSLocation,Locale.getDefault(),loader);
		readResourceBundle(bundle, WSLocation);
	}
	catch(MissingResourceException wsException){
		try {
			bundle = ResourceBundle.getBundle(OSLocation, Locale.getDefault(),loader);
			readResourceBundle(bundle, WSLocation);
		} catch (MissingResourceException osException) {
			if (location != OSLocation) {
				bundle = ResourceBundle.getBundle(location,Locale.getDefault(),loader);
				readResourceBundle(bundle, WSLocation);