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/*******************************************************************************
* Copyright (c) 2011, 2015 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.ui.internal.operations;
import java.beans.PropertyChangeEvent;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.tcf.te.core.utils.PropertyChangeProvider;
import org.eclipse.tcf.te.tcf.filesystem.core.interfaces.runtime.IFSTreeNode;
import org.eclipse.tcf.te.ui.swt.DisplayUtil;
import org.eclipse.ui.PlatformUI;
/**
* The clip board to which copy or cut files/folders.
*/
public class FsClipboard extends PropertyChangeProvider {
/* default */ static class FsClipboardContent {
// The constants to define the current operation type of the clip board.
public static final int CUT = 0;
public static final int COPY = 1;
// The operation type, CUT, COPY or NONE.
public final int operation;
// The currently selected files/folders.
public final List<IFSTreeNode> files;
/**
* Constructor
*/
public FsClipboardContent(int operation, List<IFSTreeNode> files) {
Assert.isTrue(operation == CUT || operation == COPY);
this.operation = operation;
Assert.isNotNull(files);
this.files = files;
}
}
/* default */ final Clipboard clipboard;
/**
* Create a clip board instance.
*/
public FsClipboard() {
clipboard = new Clipboard(PlatformUI.getWorkbench().getDisplay());
}
public boolean isCutOp() {
final AtomicReference<Object> object = new AtomicReference<Object>();
Runnable runnable = new Runnable() {
@Override
public void run() {
object.set(clipboard.getContents(FsClipboardTransfer.getInstance()));
}
};
exec(runnable);
FsClipboardContent content = (FsClipboardContent) object.get();
return content != null && content.operation == FsClipboardContent.CUT;
}
public boolean isCopyOp() {
final AtomicReference<Object> object = new AtomicReference<Object>();
Runnable runnable = new Runnable() {
@Override
public void run() {
object.set(clipboard.getContents(FsClipboardTransfer.getInstance()));
}
};
exec(runnable);
FsClipboardContent content = (FsClipboardContent) object.get();
return content != null && content.operation == FsClipboardContent.COPY;
}
public boolean isEmpty() {
final AtomicReference<Object> object = new AtomicReference<Object>();
Runnable runnable = new Runnable() {
@Override
public void run() {
object.set(clipboard.getContents(FsClipboardTransfer.getInstance()));
}
};
exec(runnable);
FsClipboardContent content = (FsClipboardContent) object.get();
return content == null || content.files.isEmpty();
}
/**
* Get the currently selected files/folders to operated.
*/
public List<IFSTreeNode> getFiles() {
final AtomicReference<Object> object = new AtomicReference<Object>();
Runnable runnable = new Runnable() {
@Override
public void run() {
object.set(clipboard.getContents(FsClipboardTransfer.getInstance()));
}
};
exec(runnable);
FsClipboardContent content = (FsClipboardContent) object.get();
return content.files;
}
/**
* Cut the specified files/folders to the clip board.
*/
public void cutFiles(List<IFSTreeNode> files) {
Assert.isNotNull(files);
final FsClipboardContent content = new FsClipboardContent(FsClipboardContent.CUT, files);
final FsClipboardTransfer transfer = FsClipboardTransfer.getInstance();
transfer.setContent(content);
Runnable runnable = new Runnable() {
@Override
public void run() {
clipboard.setContents(new Object[] { content }, new Transfer[] { transfer });
PropertyChangeEvent event = new PropertyChangeEvent(this, "cut", null, null); //$NON-NLS-1$
firePropertyChange(event);
}
};
exec(runnable);
}
/**
* Copy the specified files/folders to the clip board.
*
* @param files The file/folder nodes.
*/
public void copyFiles(List<IFSTreeNode> files) {
Assert.isNotNull(files);
final FsClipboardContent content = new FsClipboardContent(FsClipboardContent.COPY, files);
final FsClipboardTransfer transfer = FsClipboardTransfer.getInstance();
transfer.setContent(content);
Runnable runnable = new Runnable() {
@Override
public void run() {
clipboard.setContents(new Object[] { content }, new Transfer[] { transfer });
PropertyChangeEvent event = new PropertyChangeEvent(this, "copy", null, null); //$NON-NLS-1$
firePropertyChange(event);
}
};
exec(runnable);
}
/**
* Clear the clip board.
*/
public void clear() {
Runnable runnable = new Runnable() {
@Override
public void run() {
clipboard.clearContents();
PropertyChangeEvent event = new PropertyChangeEvent(this, "clear", null, null); //$NON-NLS-1$
firePropertyChange(event);
}
};
exec(runnable);
}
/**
* Executes the given runnable in the UI thread synchronously.
*
* @param runnable The runnable. Must not be <code>null</code>.
*/
private void exec(Runnable runnable) {
Assert.isNotNull(runnable);
if (Display.getCurrent() != null) {
runnable.run();
} else {
DisplayUtil.safeSyncExec(runnable);
}
}
/**
* Dispose the clip board.
*/
public void dispose() {
Runnable runnable = new Runnable() {
@Override
public void run() {
if (!clipboard.isDisposed()) {
try { clipboard.dispose(); } catch (SWTException e) {}
}
}
};
exec(runnable);
}
/**
* Get the system clip board.
*
* @return The system clip board.
*/
public final Clipboard getSystemClipboard() {
return clipboard;
}
}
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