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/*******************************************************************************
* Copyright (c) 2001, 2004 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
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*******************************************************************************/
package org.eclipse.wst.dtd.ui.internal.views.contentoutline.actions;
import java.util.Iterator;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.actions.SelectionListenerAction;
import org.eclipse.wst.dtd.core.internal.CMNode;
import org.eclipse.wst.dtd.core.internal.DTDFile;
import org.eclipse.wst.dtd.core.internal.DTDNode;
import org.eclipse.wst.dtd.core.internal.util.DTDBatchNodeDelete;
import org.eclipse.wst.dtd.ui.internal.DTDUIMessages;
public class DeleteAction extends SelectionListenerAction {
public DeleteAction(String label) {
super(label);
}
public void run() {
IStructuredSelection selection = getStructuredSelection();
Iterator iter = selection.iterator();
DTDBatchNodeDelete batchDelete = null;
DTDFile dtdFile = null;
while (iter.hasNext()) {
Object element = iter.next();
if (element instanceof DTDNode) {
DTDNode node = (DTDNode) element;
dtdFile = node.getDTDFile();
if (batchDelete == null) {
batchDelete = new DTDBatchNodeDelete(dtdFile);
}
batchDelete.addNode((DTDNode) element);
}
}
dtdFile.getDTDModel().beginRecording(this, DTDUIMessages._UI_LABEL_DTD_FILE_DELETE); //$NON-NLS-1$
batchDelete.deleteNodes(this);
dtdFile.getDTDModel().endRecording(this);
}
public boolean updateSelection(IStructuredSelection sel) {
if (!super.updateSelection(sel))
return false;
Object selectedObject = sel.getFirstElement();
if (selectedObject instanceof DTDNode && !(selectedObject instanceof CMNode && ((CMNode) selectedObject).isRootElementContent())) {
setEnabled(true);
return true; // enable delete menu item
}
else {
setEnabled(false);
return false; // disable it - grey out
}
}
}
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