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/*
* Copyright (c) 2011, 2012 Eike Stepper (Berlin, Germany) 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.releng.relativepaths;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.dialogs.FilteredResourcesSelectionDialog;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public class CreateRelativePathAction implements IObjectActionDelegate
{
private static final String TITLE = "Create Relative Path";
private Shell shell;
private ISelection selection;
public CreateRelativePathAction()
{
}
public void setActivePart(IAction action, IWorkbenchPart targetPart)
{
shell = targetPart.getSite().getShell();
}
public void selectionChanged(IAction action, ISelection selection)
{
this.selection = selection;
}
public void run(IAction action)
{
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IResource source = (IResource)((IStructuredSelection)selection).getFirstElement();
FilteredResourcesSelectionDialog dialog = new FilteredResourcesSelectionDialog(shell, false, root, IResource.FILE);
dialog.setTitle(TITLE);
if (dialog.open() == Dialog.OK)
{
IResource target = (IResource)dialog.getResult()[0];
String link = createLink(source, target);
copyToClipboard(shell.getDisplay(), link);
MessageDialog.openInformation(shell, TITLE, "The following relative path has been copied to the clipboard:\n"
+ link);
}
}
public static String createLink(IResource source, IResource target)
{
return createLink(new File(source.getLocation().toString()), new File(target.getLocation().toString()));
}
public static String createLink(File source, File target)
{
List<String> sourceSegments = getSegments(source);
List<String> targetSegments = getSegments(target);
int minSize = Math.min(sourceSegments.size(), targetSegments.size());
for (int i = 0; i < minSize; i++)
{
if (sourceSegments.get(0).equals(targetSegments.get(0)))
{
sourceSegments.remove(0);
targetSegments.remove(0);
}
else
{
break;
}
}
StringBuilder builder = new StringBuilder();
for (int i = 0; i < sourceSegments.size() - 1; i++)
{
builder.append("../");
}
boolean first = true;
for (String segment : targetSegments)
{
if (first)
{
first = false;
}
else
{
builder.append("/");
}
builder.append(segment);
}
return builder.toString();
}
private static List<String> getSegments(File file)
{
List<String> result = new ArrayList<String>();
getSegments(file, result);
return result;
}
private static void getSegments(File file, List<String> result)
{
File parent = file.getParentFile();
if (parent != null)
{
getSegments(parent, result);
}
result.add(file.getName());
}
public static void copyToClipboard(Display display, String text)
{
Clipboard clipboard = null;
try
{
clipboard = new Clipboard(display);
clipboard.setContents(new Object[] { text }, new Transfer[] { TextTransfer.getInstance() });
}
finally
{
if (clipboard != null)
{
clipboard.dispose();
}
}
}
}
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