/*******************************************************************************
* Copyright (c) 2000, 2008 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.cdt.internal.ui.cview;
import java.util.List;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.CopyFilesAndFoldersOperation;
import org.eclipse.ui.actions.CopyProjectOperation;
import org.eclipse.ui.actions.SelectionListenerAction;
import org.eclipse.ui.part.ResourceTransfer;
import org.eclipse.cdt.internal.ui.ICHelpContextIds;
/**
* Standard action for pasting resources on the clipboard to the selected resource's location.
* <p>
* This class may be instantiated; it is not intended to be subclassed.
* </p>
*
* @since 2.0
*/
/*package*/
public class PasteAction extends SelectionListenerAction {
/**
* The id of this action.
*/
public static final String ID = PlatformUI.PLUGIN_ID + ".PasteAction"; //$NON-NLS-1$
/**
* The shell in which to show any dialogs.
*/
private Shell shell;
/**
* System clipboard
*/
Clipboard clipboard;
/**
* Creates a new action.
*
* @param shell the shell for any dialogs
*/
public PasteAction(Shell shell, Clipboard clipboard) {
super(CViewMessages.PasteAction_title);
Assert.isNotNull(shell);
Assert.isNotNull(clipboard);
this.shell = shell;
this.clipboard = clipboard;
setToolTipText(CViewMessages.PasteAction_toolTip);
setId(PasteAction.ID);
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, ICHelpContextIds.PASTE_ACTION);
}
/**
* Returns the actual target of the paste action. Returns null
* if no valid target is selected.
*
* @return the actual target of the paste action
*/
private IResource getTarget() {
List<?> selectedResources = getSelectedResources();
for (int i = 0; i < selectedResources.size(); i++) {
IResource resource = (IResource) selectedResources.get(i);
if (resource instanceof IProject && !((IProject) resource).isOpen())
return null;
if (resource.getType() == IResource.FILE)
resource = resource.getParent();
if (resource != null)
return resource;
}
return null;
}
/**
* Returns whether any of the given resources are linked resources.
*
* @param resources resource to check for linked type. may be null
* @return true=one or more resources are linked. false=none of the
* resources are linked
*/
private boolean isLinked(IResource[] resources) {
if (resources != null) {
for (int i = 0; i < resources.length; i++) {
if (resources[i].isLinked()) {
return true;
}
}
}
return false;
}
/**
* Implementation of method defined on <code>IAction</code>.
*/
@Override
public void run() {
// try a resource transfer
ResourceTransfer resTransfer = ResourceTransfer.getInstance();
IResource[] resourceData = (IResource[]) clipboard.getContents(resTransfer);
if (resourceData != null && resourceData.length > 0) {
if (resourceData[0].getType() == IResource.PROJECT) {
// enablement checks for all projects
for (int i = 0; i < resourceData.length; i++) {
CopyProjectOperation operation = new CopyProjectOperation(this.shell);
operation.copyProject((IProject) resourceData[i]);
}
} else {
// enablement should ensure that we always have access to a container
IContainer container = getContainer();
CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation(this.shell);
operation.copyResources(resourceData, container);
}
return;
}
// try a file transfer
FileTransfer fileTransfer = FileTransfer.getInstance();
String[] fileData = (String[]) clipboard.getContents(fileTransfer);
if (fileData != null) {
// enablement should ensure that we always have access to a container
IContainer container = getContainer();
CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation(this.shell);
operation.copyFiles(fileData, container);
}
}
/**
* Returns the container to hold the pasted resources.
*/
private IContainer getContainer() {
List<?> selection = getSelectedResources();
if (selection.get(0) instanceof IFile)
return ((IFile) selection.get(0)).getParent();
return (IContainer) selection.get(0);
}
/**
* The <code>PasteAction</code> implementation of this
* <code>SelectionListenerAction</code> method enables this action if
* a resource compatible with what is on the clipboard is selected.
*/
@Override
protected boolean updateSelection(IStructuredSelection selection) {
if (!super.updateSelection(selection))
return false;
final IResource[][] clipboardData = new IResource[1][];
shell.getDisplay().syncExec(new Runnable() {
public void run() {
// clipboard must have resources or files
ResourceTransfer resTransfer = ResourceTransfer.getInstance();
clipboardData[0] = (IResource[])clipboard.getContents(resTransfer);
}
});
IResource[] resourceData = clipboardData[0];
if (resourceData != null && resourceData.length > 0 && resourceData[0].getType() == IResource.PROJECT) {
for (int i = 0; i < resourceData.length; i++) {
// make sure all resource data are open projects
// can paste open projects regardless of selection
if (resourceData[i].getType() != IResource.PROJECT || ((IProject) resourceData[i]).isOpen() == false)
return false;
}
return true;
}
// can paste files and folders to a single selection (project must be open)
// or multiple file selection with the same parent
if (getSelectedNonResources().size() > 0)
return false;
// targetResource is null if no valid target is selected or
// selection is empty
IResource targetResource = getTarget();
if (targetResource == null)
return false;
// can paste files and folders to a single selection (file, folder,
// open project) or multiple file selection with the same parent
List<?> selectedResources = getSelectedResources();
if (selectedResources.size() > 1) {
// if more than one resource is selected the selection has
// to be all files with the same parent
for (int i = 0; i < selectedResources.size(); i++) {
IResource resource = (IResource) selectedResources.get(i);
if (resource.getType() != IResource.FILE)
return false;
if (!targetResource.equals(resource.getParent()))
return false;
}
}
if (resourceData != null) {
// linked resources can only be pasted into projects
if (isLinked(resourceData) && targetResource.getType() != IResource.PROJECT)
return false;
if (targetResource.getType() == IResource.FOLDER) {
// don't try to copy folder to self
for (int i = 0; i < resourceData.length; i++) {
if (targetResource.equals(resourceData[i]))
return false;
}
}
return true;
}
TransferData[] transfers = clipboard.getAvailableTypes();
FileTransfer fileTransfer = FileTransfer.getInstance();
for (int i = 0; i < transfers.length; i++) {
if (fileTransfer.isSupportedType(transfers[i]))
return true;
}
return false;
}
}