com.google.dart.tools.deploy.DelayedEventsProcessor.java Source code

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Here is the source code for com.google.dart.tools.deploy.DelayedEventsProcessor.java

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/*
 * Copyright (c) 2011, 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 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.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;

import java.util.ArrayList;

/**
 * Helper class used to process delayed events. Events currently supported:
 * <ul>
 * <li>SWT.OpenDocument</li>
 * </ul>
 */
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);
    }

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

        String[] filePaths = new String[filesToOpen.size()];
        filesToOpen.toArray(filePaths);
        filesToOpen.clear();
        for (int i = 0; i < filePaths.length; i++) {
            openFile(display, filePaths[i]);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
     */
    @Override
    public void handleEvent(Event event) {
        final String path = event.text;
        if (path == null) {
            return;
        }
        filesToOpen.add(path);
    }

    private void openFile(Display display, final String path) {
        display.asyncExec(new Runnable() {
            @Override
            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) {

                        // TODO: Add a more robust way of displaying error messages at this point. Maybe a read
                        // only editor page like the Welcome editor so that users can get to the information.

                        String msg = NLS.bind("The file ''{0}'' could not be opened.", path);
                        MessageDialog.open(MessageDialog.ERROR, window.getShell(), "Open File", msg, SWT.SHEET);
                    }
                    try {
                        IDE.openInternalEditorOnFileStore(page, fileStore);
                        IWorkbenchPartReference partRef = page.getActivePartReference();
                        if (partRef != null) {
                            if (!page.isPageZoomed()) {
                                page.toggleZoom(partRef);
                            }
                        }
                        Shell shell = window.getShell();
                        if (shell != null) {
                            if (shell.getMinimized()) {
                                shell.setMinimized(false);
                            }
                            shell.forceActive();
                        } else {
                            throw new PartInitException("Shell could not be found");
                        }
                    } catch (PartInitException e) {
                        String msg = NLS.bind("The file ''{0}'' could not be opened.\nSee log for details.",
                                fileStore.getName());
                        CoreException eLog = new PartInitException(e.getMessage());
                        Activator.getDefault().getLog()
                                .log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, msg, eLog));
                        MessageDialog.open(MessageDialog.ERROR, window.getShell(), "Open File", msg, SWT.SHEET);
                    }
                } else {
                    String msg = NLS.bind("The file ''{0}'' could not be found.", path);
                    MessageDialog.open(MessageDialog.ERROR, window.getShell(), "Open File", msg, SWT.SHEET);
                }
            }
        });
    }

}