Add Workspace Address to Display data

This contributes to adding the workspace address to the display data on
the initilization of the workbench. This contribution allows further SWT
components to utilize this information.

Contributes to eclipse-platform/eclipse.platform.swt#1013

Author: amartya4256

bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/Workbench.java

@@ -37,6 +37,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -292,6 +293,8 @@ public final class Workbench extends EventManager implements IWorkbench, org.ecl
 	public static final String PROP_EXIT_CODE = "eclipse.exitcode"; //$NON-NLS-1$
 	private static final String CMD_DATA = "-data"; //$NON-NLS-1$
 
+	private static final String DISPLAY_USER_DATA_FOLDER = "displayUserDataFolder"; //$NON-NLS-1$
+
 	private static final class StartupProgressBundleListener implements ServiceListener {
 
 		private final SubMonitor subMonitor;
@@ -451,6 +454,8 @@ public void serviceChanged(ServiceEvent event) {
 	private Workbench(Display display, final WorkbenchAdvisor advisor, MApplication app, IEclipseContext appContext) {
 		this.advisor = Objects.requireNonNull(advisor);
 		this.display = Objects.requireNonNull(display);
+		this.display.setData(DISPLAY_USER_DATA_FOLDER,
+				Paths.get(URI.create(Platform.getInstanceLocation().getURL().toString())).toString());
 		application = app;
 		e4Context = appContext;