/*******************************************************************************
* 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.actions.range;
import org.eclipse.gef.commands.Command;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jst.pagedesigner.commands.range.ApplyStyleCommand;
import org.eclipse.jst.pagedesigner.dom.DOMPositionHelper;
import org.eclipse.jst.pagedesigner.dom.DOMRange;
import org.eclipse.jst.pagedesigner.dom.DOMRangeHelper;
import org.eclipse.jst.pagedesigner.dom.EditModelQuery;
import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
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.Node;
/**
* @author mengbo
*/
public class ChangeStyleAction extends DesignerToolBarAction {
private final String _expectedTag;
/**
* @param text
* @param name
* @param image
* @param style
*/
public ChangeStyleAction(String text, String name, ImageDescriptor image,
int style) {
super(text, style);
_expectedTag = name;
this.setImageDescriptor(image);
}
/**
* @param text
* @param name
* @param enabled
* @param disabled
* @param style
*/
public ChangeStyleAction(String text, String name, ImageDescriptor enabled,
ImageDescriptor disabled, int style) {
super(text, style);
_expectedTag = name;
setImageDescriptor(enabled);
setDisabledImageDescriptor(disabled);
}
protected boolean isApplied(DOMRange range) {
if (range == null) {
return false;
}
boolean ordered = range.isOrdered();
IDOMPosition start = ordered ? range.getStartPosition() : range
.getEndPosition();
IDOMPosition end = ordered ? range.getEndPosition() : range
.getStartPosition();
Node startnode = start.getContainerNode();
Node endnode = end.getContainerNode();
if (!EditModelQuery.hasAncestor(startnode, _expectedTag, true)) {
return false;
}
for (Node node = startnode; node != endnode; node = EditModelQuery
.getInstance().getNextLeafNeighbor(node)) {
if (!EditModelQuery.hasAncestor(node, _expectedTag, true)) {
return false;
}
}
if (!EditModelQuery.hasAncestor(endnode, _expectedTag, true)) {
return false;
}
return true;
}
/**
* @return the expected tag
*/
protected String getExpectedTag() {
return _expectedTag;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.commands.range.DesignerToolBarAction#getCommand()
*/
protected Command getCommand() {
DesignRange range = getViewer().getRangeSelection();
DOMRange dRange = DOMRangeHelper.toDOMRange(range);
Command command;
if (isApplied(dRange)) {
// command = new UnapplyStyleCommand(getViewer(), _expectedTag,
// null, null);
// since the un-applystyle is not implemented yet,we do nothing
// here.
command = null;
this.setChecked(true);
} else {
command = new ApplyStyleCommand(getViewer(), _expectedTag, null,
null);
}
return command;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.texteditor.IUpdate#update()
*/
public void update() {
if (canRun(getViewer())) {
setEnabled(true);
} else {
setEnabled(false);
}
updateStatus();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.actions.range.DesignerToolBarAction#updateStatus()
*/
public void updateStatus() {
IHTMLGraphicalViewer viewer = getViewer();
if (viewer != null && viewer.isInRangeMode()
&& viewer.getModel().getDocument().hasChildNodes()) {
DesignRange range = getViewer().getRangeSelection();
if (range != null && range.isValid()) {
DOMRange domRange = null;
domRange = new DOMRange(DOMPositionHelper.toDOMPosition(range
.getStartPosition()), DOMPositionHelper
.toDOMPosition(range.getEndPosition()));
if (isApplied(domRange)) {
this.setChecked(true);
} else {
this.setChecked(false);
}
return;
}
}
this.setChecked(false);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.actions.range.DesignerToolBarAction#canRun(org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer)
*/
protected boolean canRun(IHTMLGraphicalViewer viewer) {
if (viewer != null && viewer.isInRangeMode()
&& viewer.getModel().getDocument().hasChildNodes()) {
DesignRange range = viewer.getRangeSelection();
if (range != null && range.isValid()) {
DesignPosition startPos = range.getStartPosition();
DesignPosition endPos = range.getEndPosition();
if (startPos != endPos) {
return true;
}
}
}
return false;
}
}