/*******************************************************************************
 * Copyright (c) 2005-2008 Polarion Software.
 * 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:
 *    Alexey Mikoyan - Initial implementation
 *******************************************************************************/
package org.eclipse.team.svn.ui.console;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.team.svn.core.operation.AbstractActionOperation;
import org.eclipse.team.svn.ui.SVNTeamUIPlugin;
import org.eclipse.team.svn.ui.utility.UIMonitorUtility;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorRegistry;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.console.IHyperlink;
import org.eclipse.ui.part.FileEditorInput;

/**
 * Hyperlink to local file
 *
 * @author Alexey Mikoyan
 *
 */
public class LocalFileHyperlink implements IHyperlink {
	
	protected String pathString;
	
	public LocalFileHyperlink(String pathString) {
		this.pathString = pathString;
	}

	public void linkActivated() {
		UIMonitorUtility.doTaskBusyDefault(new OpenLocalFileOperation(this.pathString));
	}

	public void linkEntered() {
	}

	public void linkExited() {
	}
	
	protected class OpenLocalFileOperation extends AbstractActionOperation {
		
		protected String filePath;
		
		public OpenLocalFileOperation(String filePath) {
			super("Operation_OpenLocalFile"); //$NON-NLS-1$
			this.filePath = filePath;
		}

		protected void runImpl(IProgressMonitor monitor) throws Exception {
			IWorkbenchWindow window = SVNTeamUIPlugin.instance().getWorkbench().getActiveWorkbenchWindow();
			if (window == null || window.getActivePage() == null) {
				return;
			}
			IWorkbenchPage page = window.getActivePage();
			if (ResourcesPlugin.getWorkspace().getRoot() == null) {
				return;
			}
			
			IPath path = Path.fromOSString(this.filePath);
			if (!path.isAbsolute()) {
				path = path.makeAbsolute().setDevice(ResourcesPlugin.getWorkspace().getRoot().getLocation().getDevice());
			}
			
			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(path);
			if (file == null || !file.exists()) {
				if (path != null && !path.isAbsolute() && path.segmentCount() > 1) {
					path = path.removeFirstSegments(1);
					file = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
				} 
			}
			if (file == null || !file.exists()) {
				return;
			}
			IEditorRegistry registry = PlatformUI.getWorkbench().getEditorRegistry();
			if (registry == null) {
				return;
			}
			IEditorDescriptor descriptor = null;
			IContentDescription contentDescription = file.getContentDescription();
			descriptor = registry.getDefaultEditor(path.lastSegment(), contentDescription != null ? contentDescription.getContentType(): null);
			
			if (descriptor == null) {
				descriptor = registry.findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID);
			}
			
			if (descriptor == null) {
				return;
			}
			
			IEditorInput input = new FileEditorInput(file);
			page.openEditor(input, descriptor.getId());
		}
		
	}

}