TargetActionStub.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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 org.napile.idea.thermit.config.actions;

import java.util.concurrent.atomic.AtomicBoolean;

import org.napile.idea.thermit.config.AntBuildFile;
import org.napile.idea.thermit.config.AntConfigurationListener;
import org.napile.idea.thermit.config.ThermitConfiguration;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.actionSystem.ActionManager;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Disposer;

/**
 * @author Eugene Zhuravlev
 *         Date: Oct 3, 2007
 */
public class TargetActionStub extends AnAction implements Disposable
{
	private final String myActionId;
	private Project myProject;
	private final AtomicBoolean myActionInvoked = new AtomicBoolean(false);

	public TargetActionStub(String actionId, Project project)
	{
		super("thermit target action stub");
		myActionId = actionId;
		myProject = project;
		Disposer.register(project, this);
	}

	public void dispose()
	{
		ActionManager.getInstance().unregisterAction(myActionId);
		myProject = null;
	}

	public void actionPerformed(final AnActionEvent e)
	{
		if(myProject == null)
		{
			return;
		}
		try
		{
			final ThermitConfiguration config = ThermitConfiguration.getInstance(myProject);  // this call will also lead to thermit configuration loading
			final AntConfigurationListener listener = new AntConfigurationListener()
			{
				public void configurationLoaded()
				{
					config.removeAntConfigurationListener(this);
					invokeAction(e);
				}

				public void buildFileChanged(final AntBuildFile buildFile)
				{/*empty*/}

				public void buildFileAdded(final AntBuildFile buildFile)
				{/*empty*/}

				public void buildFileRemoved(final AntBuildFile buildFile)
				{/*empty*/}
			};
			config.addAntConfigurationListener(listener);
			Disposer.register(myProject, new ListenerRemover(config, listener));
		}
		finally
		{
			invokeAction(e);
			dispose();
		}
	}

	private void invokeAction(final AnActionEvent e)
	{
		final AnAction action = ActionManager.getInstance().getAction(myActionId);
		if(action == null || action instanceof TargetActionStub)
		{
			return;
		}
		if(!myActionInvoked.getAndSet(true))
		{
			//final DataContext context = e.getDataContext();
			//if (context instanceof DataManagerImpl.MyDataContext) {
			//  // hack: macro.expand() can cause UI events such as showing dialogs ('Prompt' macro) which may 'invalidate' the datacontext
			//  // since we know exactly that context is valid, we need to update its event count
			//  ((DataManagerImpl.MyDataContext)context).setEventCount(IdeEventQueue.getInstance().getEventCount());
			//}
			action.actionPerformed(e);
		}
	}

	private static class ListenerRemover implements Disposable
	{
		private ThermitConfiguration myConfig;
		private AntConfigurationListener myListener;

		private ListenerRemover(ThermitConfiguration config, AntConfigurationListener listener)
		{
			myConfig = config;
			myListener = listener;
		}

		public void dispose()
		{
			final ThermitConfiguration configuration = myConfig;
			final AntConfigurationListener listener = myListener;
			myConfig = null;
			myListener = null;
			if(configuration != null && listener != null)
			{
				configuration.removeAntConfigurationListener(listener);
			}
		}
	}
}