/*******************************************************************************
 * Copyright (c) 2000, 2005 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 org.eclipse.ui.views.bookmarkexplorer;

import java.util.ArrayList;
import java.util.Map;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.views.bookmarkexplorer.BookmarkMessages;
import org.eclipse.ui.part.MarkerTransfer;

/**
 * Pastes one or more bookmark(s) from the clipboard into the bookmark navigator.
 */
class PasteBookmarkAction extends BookmarkAction {

    private BookmarkNavigator view;

    /**
     * The constructor.
     * 
     * @param view the view
     */
    public PasteBookmarkAction(BookmarkNavigator view) {
        super(view, BookmarkMessages.PasteBookmark_text);
        this.view = view;
        PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
                IBookmarkHelpContextIds.PASTE_BOOKMARK_ACTION);
        setEnabled(false);
    }

    /**
     * Copies the marker(s) from the clipboard to the bookmark navigator view.
     */
    public void run() {
        // Get the markers from the clipboard
        MarkerTransfer transfer = MarkerTransfer.getInstance();
        final IMarker[] markerData = (IMarker[]) view.getClipboard()
                .getContents(transfer);

        if (markerData == null)
            return;

        final ArrayList newMarkers = new ArrayList();

        try {
            view.getWorkspace().run(new IWorkspaceRunnable() {
                public void run(IProgressMonitor monitor) throws CoreException {
                    for (int i = 0; i < markerData.length; i++) {
                        // Only paste tasks (not problems)
                        if (!markerData[i].getType().equals(IMarker.BOOKMARK))
                            continue;

                        // Paste to the same resource as the original
                        IResource resource = markerData[i].getResource();
                        Map attributes = markerData[i].getAttributes();
                        IMarker marker = resource
                                .createMarker(IMarker.BOOKMARK);
                        marker.setAttributes(attributes);
                        newMarkers.add(marker);
                    }
                }
            }, null);
        } catch (CoreException e) {
            ErrorDialog.openError(view.getShell(), BookmarkMessages.PasteBookmark_errorTitle,
                    null, e.getStatus());
            return;
        }

        // Need to do this in an asyncExec, even though we're in the UI thread here,
        // since the bookmark navigator updates itself with the addition in an asyncExec,
        // which hasn't been processed yet.
        // Must be done outside IWorkspaceRunnable above since notification for add is
        // sent after IWorkspaceRunnable is run.
        if (newMarkers.size() > 0) {
            view.getShell().getDisplay().asyncExec(new Runnable() {
                public void run() {
                    view.getViewer().setSelection(
                            new StructuredSelection(newMarkers));
                    view.updatePasteEnablement();
                }
            });
        }
    }

}