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/*******************************************************************************
* Copyright (c) 2006 Sybase, 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.commands;
import java.util.List;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jst.pagedesigner.dom.EditModelQuery;
import org.eclipse.jst.pagedesigner.dom.EditValidateUtil;
import org.eclipse.jst.pagedesigner.parts.DocumentEditPart;
import org.eclipse.jst.pagedesigner.parts.SubNodeEditPart;
import org.eclipse.jst.pagedesigner.validation.caret.Target;
import org.eclipse.jst.pagedesigner.viewer.DesignPosition;
import org.eclipse.jst.pagedesigner.viewer.DesignRange;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
/**
* A command to switch the selection
*
*/
public class SwitchSelectionCommand extends Command {
IHTMLGraphicalViewer _viewer;
/**
* @param viewer
*/
public SwitchSelectionCommand(IHTMLGraphicalViewer viewer) {
_viewer = viewer;
}
public void execute() {
if (_viewer.isInRangeMode()) {
ISelection selection = _viewer.getSelection();
if (selection instanceof DesignRange) {
DesignPosition posStart = ((DesignRange) selection)
.getStartPosition();
DesignPosition posEnd = ((DesignRange) selection)
.getEndPosition();
if (EditValidateUtil.validPosition(posStart)
&& EditValidateUtil.validPosition(posEnd)) {
Node ancestor = EditModelQuery.getInstance()
.getCommonAncestor(posStart.getContainerNode(),
posEnd.getContainerNode());
if (ancestor instanceof Text) {
ancestor = ancestor.getParentNode();
}
if (ancestor instanceof Element) {
EditPart part = Target.resolvePart(ancestor);
if (part instanceof SubNodeEditPart) {
_viewer.select(part);
}
}
}
}
} else {
List parts = _viewer.getSelectedEditParts();
if (parts.size() > 0) {
EditPart parent = ((EditPart) parts.get(0)).getParent();
if (!(parent instanceof DocumentEditPart)) {
_viewer.select(parent);
}
}
}
}
}
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