DartIDEApplication.java

/*
 * 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.deploy;

import com.google.dart.tools.debug.core.util.ResourceServerManager;

import org.eclipse.core.runtime.Platform;
import org.eclipse.equinox.app.IApplication;
import org.eclipse.equinox.app.IApplicationContext;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.util.Util;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.WorkbenchPlugin;

import java.io.File;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.URL;

/**
 * This class controls all aspects of the application's execution.
 */
@SuppressWarnings("restriction")
public class DartIDEApplication implements IApplication {

  private static class ConfirmMultipleEditorsDialog extends MessageDialog {

    public ConfirmMultipleEditorsDialog(Shell parentShell) {
      super(
          parentShell,
          WorkbenchMessages.DartIDEApplication_already_running_dialog_title,
          null,
          WorkbenchMessages.DartIDEApplication_already_running_dialog_msg,
          MessageDialog.QUESTION,
          new String[] {
              WorkbenchMessages.DartIDEApplication_already_running_dialog_run_button,
              WorkbenchMessages.DartIDEApplication_already_running_dialog_cancel_button},
          1);
    }

  }

  @Override
  public Object start(IApplicationContext context) throws Exception {
    Display display = PlatformUI.createDisplay();

    if (isWorkspaceServerPortBound()) {
      final Shell shell = WorkbenchPlugin.getSplashShell(display);

      final boolean[] runAnyway = new boolean[1];

      Display.getDefault().syncExec(new Runnable() {
        @Override
        public void run() {
          runAnyway[0] = new ConfirmMultipleEditorsDialog(shell).open() == 0;
        }
      });

      if (!runAnyway[0]) {
        return EXIT_OK;
      }
    }

    try {
      setWorkspaceLocation();

      // processor must be created before we start event loop
      DelayedEventsProcessor processor = new DelayedEventsProcessor(display);

      int returnCode = PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor(
          processor));
      if (returnCode == PlatformUI.RETURN_RESTART) {
        return IApplication.EXIT_RESTART;
      } else {
        return IApplication.EXIT_OK;
      }
    } finally {
      display.dispose();
    }
  }

  @Override
  public void stop() {
    if (!PlatformUI.isWorkbenchRunning()) {
      return;
    }
    final IWorkbench workbench = PlatformUI.getWorkbench();
    final Display display = workbench.getDisplay();
    display.syncExec(new Runnable() {
      @Override
      public void run() {
        if (!display.isDisposed()) {
          workbench.close();
        }
      }
    });
  }

  private boolean isWorkspaceServerPortBound() {

    try {
      new ServerSocket(ResourceServerManager.PREFERRED_PORT).close();
    } catch (IOException e) {
      return true;
    }

    return false;
  }

  private void setWorkspaceLocation() {
    Location workspaceLocation = Platform.getInstanceLocation();

    if (!workspaceLocation.isSet()) {
      File userHomeDir = new File(System.getProperty("user.home")); //$NON-NLS-1$
      URL workspaceUrl;

      try {
        if (Util.isMac()) {
          workspaceUrl = new URL("file", null, System.getProperty("user.home") //$NON-NLS-1$ //$NON-NLS-2$
              + "/Library/Application Support/DartEditor"); //$NON-NLS-1$
        } else if (Util.isWindows()) {
          File workspaceDir = new File(userHomeDir, "DartEditor"); //$NON-NLS-1$
          workspaceUrl = workspaceDir.toURI().toURL();
        } else {
          File workspaceDir = new File(userHomeDir, ".dartEditor"); //$NON-NLS-1$
          workspaceUrl = workspaceDir.toURI().toURL();
        }

        workspaceLocation.set(workspaceUrl, true);
      } catch (IllegalStateException e) {
        // This generally happens in a runtime workbench, when the application has not been launched
        // with -data @noDefault. workspaceLocation.set() cannot be called twice.
        //Activator.logError(e);
      } catch (IOException e) {
        Activator.logError(e);
      }
    }
  }

}