1 files changed, 107 insertions, 0 deletions
diff --git a/target_explorer/plugins/org.eclipse.tcf.te.ui/src/org/eclipse/tcf/te/ui/internal/executors/SWTDisplayExecutor.java b/target_explorer/plugins/org.eclipse.tcf.te.ui/src/org/eclipse/tcf/te/ui/internal/executors/SWTDisplayExecutor.java
new file mode 100644
index 000000000..e92f86380
--- /dev/null
+++ b/target_explorer/plugins/org.eclipse.tcf.te.ui/src/org/eclipse/tcf/te/ui/internal/executors/SWTDisplayExecutor.java
@@ -0,0 +1,107 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Wind River Systems, 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:
+ * Wind River Systems - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.tcf.te.ui.internal.executors;
+
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.tcf.te.ui.activator.UIPlugin;
+import org.eclipse.tcf.te.runtime.concurrent.interfaces.IExecutor;
+import org.eclipse.tcf.te.runtime.concurrent.interfaces.INestableExecutor;
+import org.eclipse.tcf.te.runtime.concurrent.interfaces.ISingleThreadedExecutor;
+import org.eclipse.tcf.te.runtime.extensions.ExecutableExtension;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * SWT display executor implementation utilizing the platform display.
+ */
+public class SWTDisplayExecutor extends ExecutableExtension implements IExecutor, ISingleThreadedExecutor, INestableExecutor {
+
+	/* (non-Javadoc)
+	 * @see java.util.concurrent.Executor#execute(java.lang.Runnable)
+	 */
+	@Override
+	public void execute(Runnable command) {
+		// Try the platform display first
+		if (PlatformUI.isWorkbenchRunning()
+				&& PlatformUI.getWorkbench() != null && PlatformUI.getWorkbench().getDisplay() != null
+				&& !PlatformUI.getWorkbench().getDisplay().isDisposed()) {
+			PlatformUI.getWorkbench().getDisplay().asyncExec(command);
+		} else {
+			// Fallback to the display associated with the current thread
+			Display display = Display.findDisplay(Thread.currentThread());
+			// If there is a display associated with the current thread,
+			// execute the runnable using that display instance.
+			if (display != null && !display.isDisposed()) {
+				display.asyncExec(command);
+			} else {
+				// There is no display to execute the runnable at.
+				// Drop execution and write a trace message if enabled
+				UIPlugin.getTraceHandler().trace("DROPPED display command invocation. No display instance found.!", 1, this); //$NON-NLS-1$
+			}
+		}
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.tcf.te.runtime.concurrent.interfaces.ISingleThreadedExecutor#isExecutorThread()
+	 */
+	@Override
+	public boolean isExecutorThread() {
+		return isExecutorThread(Thread.currentThread());
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.tcf.te.runtime.concurrent.interfaces.ISingleThreadedExecutor#isExecutorThread(java.lang.Thread)
+	 */
+	@Override
+	public boolean isExecutorThread(Thread thread) {
+		if (thread != null) {
+			// Try the platform display first
+			if (PlatformUI.isWorkbenchRunning()
+					&& PlatformUI.getWorkbench() != null && PlatformUI.getWorkbench().getDisplay() != null
+					&& !PlatformUI.getWorkbench().getDisplay().isDisposed()) {
+				return thread.equals(PlatformUI.getWorkbench().getDisplay().getThread());
+			}
+
+			// Fallback to the display associated with the current thread
+			Display display = Display.findDisplay(thread);
+			if (display != null && !display.isDisposed()) {
+				return thread.equals(display.getThread());
+			}
+		}
+		return false;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.tcf.te.runtime.concurrent.interfaces.INestableExecutor#getMaxDepth()
+	 */
+	@Override
+	public int getMaxDepth() {
+		return 1;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.tcf.te.runtime.concurrent.interfaces.INestableExecutor#readAndExecute()
+	 */
+	@Override
+	public boolean readAndExecute() {
+		// Try the platform display first
+		if (PlatformUI.isWorkbenchRunning()
+				&& PlatformUI.getWorkbench() != null && PlatformUI.getWorkbench().getDisplay() != null
+				&& !PlatformUI.getWorkbench().getDisplay().isDisposed()) {
+			return PlatformUI.getWorkbench().getDisplay().readAndDispatch();
+		}
+
+		// Fallback to the display associated with the current thread
+		Display display = Display.getCurrent();
+		if (display != null && !display.isDisposed()) {
+			return display.readAndDispatch();
+		}
+		return false;
+	}
+}