com.aptana.rcp.DelayedEventsProcessor.java Source code

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Here is the source code for com.aptana.rcp.DelayedEventsProcessor.java

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/*******************************************************************************
 * Copyright (c) 2010 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/

package com.aptana.rcp;

import java.util.ArrayList;

import org.eclipse.core.filesystem.EFS;
import org.eclipse.core.filesystem.IFileInfo;
import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;

/**
 * Helper class used to process delayed events.
 * Events currently supported:
 * <ul>
 * <li>SWT.OpenDocument</li>
 * </ul>
 * @since 3.3
 */
@SuppressWarnings("restriction")
public class DelayedEventsProcessor implements Listener {

    private ArrayList<String> filesToOpen = new ArrayList<String>(1);

    /**
     * Constructor.
     * @param display display used as a source of event
     */
    public DelayedEventsProcessor(Display display) {
        display.addListener(SWT.OpenDocument, this);
    }

    /* (non-Javadoc)
     * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
     */
    public void handleEvent(Event event) {
        final String path = event.text;
        if (path == null)
            return;
        // If we start supporting events that can arrive on a non-UI thread, the following
        // line will need to be in a "synchronized" block:
        filesToOpen.add(path);
    }

    /**
     * Process delayed events.
     * @param display display associated with the workbench 
     */
    public void catchUp(Display display) {
        if (filesToOpen.isEmpty())
            return;

        // If we start supporting events that can arrive on a non-UI thread, the following
        // lines will need to be in a "synchronized" block:
        String[] filePaths = new String[filesToOpen.size()];
        filesToOpen.toArray(filePaths);
        filesToOpen.clear();

        for (int i = 0; i < filePaths.length; i++) {
            openFile(display, filePaths[i]);
        }
    }

    private void openFile(Display display, final String path) {
        display.asyncExec(new Runnable() {
            public void run() {
                IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
                if (window == null)
                    return;
                IFileStore fileStore = EFS.getLocalFileSystem().getStore(new Path(path));
                IFileInfo fetchInfo = fileStore.fetchInfo();
                if (!fetchInfo.isDirectory() && fetchInfo.exists()) {
                    IWorkbenchPage page = window.getActivePage();
                    if (page == null) {
                        String msg = NLS.bind(IDEWorkbenchMessages.OpenDelayedFileAction_message_noWindow, path);
                        MessageDialog.open(MessageDialog.ERROR, window.getShell(),
                                IDEWorkbenchMessages.OpenDelayedFileAction_title, msg, SWT.SHEET);
                    }
                    try {
                        IDE.openInternalEditorOnFileStore(page, fileStore);
                        Shell shell = window.getShell();
                        if (shell != null) {
                            if (shell.getMinimized())
                                shell.setMinimized(false);
                            shell.forceActive();
                        }
                    } catch (PartInitException e) {
                        String msg = NLS.bind(IDEWorkbenchMessages.OpenDelayedFileAction_message_errorOnOpen,
                                fileStore.getName());
                        CoreException eLog = new PartInitException(e.getMessage());
                        IDEWorkbenchPlugin.log(msg, new Status(IStatus.ERROR, IDEApplication.PLUGIN_ID, msg, eLog));
                        MessageDialog.open(MessageDialog.ERROR, window.getShell(),
                                IDEWorkbenchMessages.OpenDelayedFileAction_title, msg, SWT.SHEET);
                    }
                } else {
                    String msg = NLS.bind(IDEWorkbenchMessages.OpenDelayedFileAction_message_fileNotFound, path);
                    MessageDialog.open(MessageDialog.ERROR, window.getShell(),
                            IDEWorkbenchMessages.OpenDelayedFileAction_title, msg, SWT.SHEET);
                }
            }
        });
    }

}