autosave.AutoSaveActivator.java Source code

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Here is the source code for autosave.AutoSaveActivator.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 autosave;

import java.util.concurrent.atomic.AtomicBoolean;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ui.IStartup;
import org.eclipse.ui.IWindowListener;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

import autosave.preferences.AutoSavePreferencePage;

/**
 * The activator class controls the plug-in life cycle
 */
public class AutoSaveActivator extends AbstractUIPlugin implements IStartup {
    // The plug-in ID
    public static final String PLUGIN_ID = "AutoSave";
    // The shared instance
    private static AutoSaveActivator plugin;

    private static final AtomicBoolean triggeredSave = new AtomicBoolean(false);

    /**
     * The constructor
     */
    public AutoSaveActivator() {
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext )
     */
    @Override
    public void start(final BundleContext context) throws Exception {
        super.start(context);
        plugin = this;
        registerListener();
    }

    /**
     *
     */
    public void registerListener() {
        final IPreferenceStore store = AutoSaveActivator.getDefault().getPreferenceStore();
        final boolean isEnabled = store.getBoolean(AutoSavePreferencePage.ENABLED);
        if (isEnabled) {
            getWorkbench().addWindowListener(new IWindowListener() {
                @Override
                public void windowActivated(final IWorkbenchWindow window) {
                }

                @Override
                public void windowClosed(final IWorkbenchWindow window) {
                }

                @Override
                public void windowDeactivated(final IWorkbenchWindow window) {
                    final boolean isEnabled = store.getBoolean(AutoSavePreferencePage.ENABLED);
                    if (isEnabled) {
                        try {
                            if (!triggeredSave.getAndSet(true)) {
                                PlatformUI.getWorkbench().saveAllEditors(false);
                                triggeredSave.set(false);
                            }
                        } catch (final Throwable e) {
                            // do not save again, and catch throwable cause of SWTErrors
                            triggeredSave.set(true);
                        }
                    }
                }

                @Override
                public void windowOpened(final IWorkbenchWindow window) {
                }
            });
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext )
     */
    @Override
    public void stop(final BundleContext context) throws Exception {
        plugin = null;
        super.stop(context);
    }

    /**
     * Returns the shared instance
     *
     * @return the shared instance
     */
    public static AutoSaveActivator getDefault() {
        return plugin;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.ui.IStartup#earlyStartup()
     */
    @Override
    public void earlyStartup() {
        // nothing to do
    }
}