/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.views.bookmarkexplorer;

import java.util.List;

import org.eclipse.core.resources.IMarker;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.part.MarkerTransfer;


/**
 * Copies one or more bookmark(s) to the clipboard.
 */
class CopyBookmarkAction extends BookmarkAction {

	/**
	 * Creates the action.
	 */
	public CopyBookmarkAction(BookmarkNavigator bookmarkNavigator) {
		super(bookmarkNavigator, BookmarkMessages.getString("CopyBookmark.text")); //$NON-NLS-1$
		WorkbenchHelp.setHelp(this, IBookmarkHelpContextIds.COPY_BOOKMARK_ACTION);
		setEnabled(false);
	}
	
	/**
	 * Performs this action.
	 */
	public void run() {
		// Get the selected markers
		BookmarkNavigator bookmarkNavigator = getView();
		StructuredViewer viewer = bookmarkNavigator.getViewer();
		IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
		if (selection.isEmpty()) {
			return;
		}
		List list = selection.toList();
		IMarker[] markers = new IMarker[list.size()];
		list.toArray(markers);

		setClipboard(markers, createBookmarkReport(markers));
	}

	/** 
	 * Updates enablement based on the current selection
	 */
	public void selectionChanged(IStructuredSelection sel) {
		setEnabled(!sel.isEmpty());
	}

	private void setClipboard(IMarker[] markers, String markerReport) {
		try {
			// Place the markers on the clipboard
			Object[] data = new Object[] {
				markers,
				markerReport};				
			Transfer[] transferTypes = new Transfer[] {
				MarkerTransfer.getInstance(),
				TextTransfer.getInstance()};
			
			// set the clipboard contents
			getView().getClipboard().setContents(data, transferTypes);
		} catch (SWTError e){
			if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD)
				throw e;
			if (MessageDialog.openQuestion(getView().getShell(), WorkbenchMessages.getString("CopyToClipboardProblemDialog.title"), WorkbenchMessages.getString("CopyToClipboardProblemDialog.message"))) //$NON-NLS-1$ //$NON-NLS-2$
				setClipboard(markers, markerReport);
		}	
	}
	
	private String createBookmarkReport(IMarker[] markers) {
		String report = ""; //$NON-NLS-1$
		
		//write header
		report += BookmarkMessages.getString("ColumnDescription.header") + '\t'; //$NON-NLS-1$
		report += BookmarkMessages.getString("ColumnResource.header") + '\t'; //$NON-NLS-1$
		report += BookmarkMessages.getString("ColumnFolder.header") + '\t'; //$NON-NLS-1$
		report += BookmarkMessages.getString("ColumnLocation.header");  //$NON-NLS-1$
		report += System.getProperty("line.separator"); //$NON-NLS-1$
		
		//write markers
		for (int i = 0; i < markers.length; i++) {
			report += MarkerUtil.getMessage(markers[i]) + '\t';
			report += MarkerUtil.getResourceName(markers[i]) + '\t';
			report += MarkerUtil.getContainerName(markers[i]) + '\t';
			int line = MarkerUtil.getLineNumber(markers[i]);
			report += BookmarkMessages.format("LineIndicator.text", new String[] {String.valueOf(line)});//$NON-NLS-1$
			report += System.getProperty("line.separator");  //$NON-NLS-1$
		}
		
		return report;
	}
}