org.eclipse.linuxtools.rpm.speceditor.rcp.DelayedEventsProcessor.java Source code

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Here is the source code for org.eclipse.linuxtools.rpm.speceditor.rcp.DelayedEventsProcessor.java

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package org.eclipse.linuxtools.rpm.speceditor.rcp;
/*******************************************************************************
 * 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
 ******************************************************************************/

import java.io.File;
import java.util.ArrayList;

import org.eclipse.jface.dialogs.MessageDialog;
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.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;

/**
 * Helper class used to process delayed events.
 * Events currently supported:
 * <ul>
 * <li>SWT.OpenDoc</li>
 * </ul>
 * @since 3.3
 */
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;
                File f = new File(path);
                if (!f.isDirectory()) {
                    try {
                        IWorkbenchPage page = window.getActivePage();
                        IDE.openEditor(page, f.toURI(), "org.eclipse.linuxtools.rpm.rcp.editor1", true); // $NON-NLS-1$
                    } catch (PartInitException e) {

                    }
                } else {
                    String msg = RPMMessages.CannotOpen + path.toString();
                    MessageDialog.open(MessageDialog.ERROR, window.getShell(), RPMMessages.InitialOpen, msg,
                            SWT.SHEET);
                }
            }
        });
    }

}