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/*******************************************************************************
* Copyright (c) 2011 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.testers;
import java.util.List;
import org.eclipse.core.expressions.PropertyTester;
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.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.ui.activator.UIPlugin;
import org.eclipse.tcf.te.tcf.filesystem.ui.internal.operations.FsClipboard;
/**
* Provide a tester to test if the paste operation is enabled.
*/
public class ClipboardPropertyTester extends PropertyTester {
/**
* Create an instance.
*/
public ClipboardPropertyTester() {
}
/*
* (non-Javadoc)
* @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
*/
@Override
public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
Assert.isTrue(receiver instanceof IStructuredSelection);
if (property.equals("canPaste")) { //$NON-NLS-1$
FsClipboard cb = UIPlugin.getClipboard();
Clipboard clipboard = cb.getSystemClipboard();
Object contents = clipboard.getContents(FileTransfer.getInstance());
if(contents != null) {
List<FSTreeNode> selection = ((IStructuredSelection) receiver).toList();
FSTreeNode hovered = null;
Assert.isTrue(!selection.isEmpty());
if (selection.size() == 1) {
FSTreeNode node = selection.get(0);
if (node.isFile()) {
hovered = node.parent;
}
else {
hovered = node;
}
}
else {
for (FSTreeNode node : selection) {
if (hovered == null) hovered = node.parent;
else if (hovered != node.parent) return false;
}
}
if (hovered.isDirectory() && hovered.isWritable()) {
return true;
}
return false;
}
else if (!cb.isEmpty()) {
List<FSTreeNode> nodes = cb.getFiles();
boolean moving = cb.isCutOp();
boolean copying = cb.isCopyOp();
List<FSTreeNode> selection = ((IStructuredSelection) receiver).toList();
FSTreeNode hovered = null;
Assert.isTrue(!selection.isEmpty());
if (selection.size() == 1) {
FSTreeNode node = selection.get(0);
if (node.isDirectory() && moving) {
hovered = node;
}
else if (node.isRoot()) {
hovered = node;
}
else {
hovered = node.parent;
}
}
else {
for (FSTreeNode node : selection) {
if (hovered == null) hovered = node.parent;
else if (hovered != node.parent) return false;
}
}
if (hovered.isDirectory() && hovered.isWritable() && (moving || copying)) {
FSTreeNode head = nodes.get(0);
String hid = head.peerNode.getPeerId();
String tid = hovered.peerNode.getPeerId();
if (hid.equals(tid)) {
for (FSTreeNode node : nodes) {
if (moving && node.parent == hovered || node.isAncestorOf(hovered)) {
return false;
}
}
return true;
}
}
}
}
return false;
}
}
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