modified Run button to always run the last launched application

editor/tools/plugins/com.google.dart.tools.debug.ui/src/com/google/dart/tools/debug/ui/launch/DartRunLastAction.java

Index: editor/tools/plugins/com.google.dart.tools.debug.ui/src/com/google/dart/tools/debug/ui/launch/DartRunLastAction.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.debug.ui/src/com/google/dart/tools/debug/ui/launch/DartRunLastAction.java	(revision 0)
+++ editor/tools/plugins/com.google.dart.tools.debug.ui/src/com/google/dart/tools/debug/ui/launch/DartRunLastAction.java	(revision 0)
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2012, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.dart.tools.debug.ui.launch;
+
+import com.google.dart.tools.debug.ui.internal.DartDebugUIPlugin;
+import com.google.dart.tools.debug.ui.internal.DartUtil;
+import com.google.dart.tools.debug.ui.internal.DebugErrorHandler;
+import com.google.dart.tools.debug.ui.internal.util.LaunchUtils;
+
+import org.eclipse.debug.core.ILaunchConfiguration;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.ui.IWorkbenchWindow;
+
+import java.util.List;
+
+/**
+ * Launches the last application to have run
+ */
+public class DartRunLastAction extends DartAbstractAction {
+
+  public DartRunLastAction() {
+    this(null, false);
+  }
+
+  public DartRunLastAction(IWorkbenchWindow window) {
+    this(window, false);
+  }
+
+  public DartRunLastAction(IWorkbenchWindow window, boolean noMenu) {
+    super(window, "Run", noMenu ? IAction.AS_PUSH_BUTTON : IAction.AS_DROP_DOWN_MENU);
+
+    setActionDefinitionId("com.google.dart.tools.debug.ui.run.last");
+    setImageDescriptor(DartDebugUIPlugin.getImageDescriptor("obj16/run_exc.gif"));
+  }
+
+  public DartRunLastAction(IWorkbenchWindow window, String name, int flags) {
+    super(window, name, flags);
+  }
+
+  @Override
+  public void run() {
+    try {
+
+      List<ILaunchConfiguration> launches = LaunchUtils.getAllLaunches();
+
+      if (launches.size() != 0) {
+
+        ILaunchConfiguration launchConfig = LaunchUtils.chooseLatest(launches);
+        launch(launchConfig);
+
+      } else {
+
+        DartRunAction dartRunAction = new DartRunAction(getWindow());
+        dartRunAction.run();
+      }
+    } catch (Throwable exception) {
+      // We need to defensively show all errors coming out of here - the user needs feedback as
+      // to why their launch didn't work.
+      DartUtil.logError(exception);
+
+      DebugErrorHandler.errorDialog(window.getShell(), "Error During Launch",
+          "Internal error during launch - please report this using the feedback mechanism!",
+          exception);
+    }
+  }
+
+}