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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.validation.caret;
import org.eclipse.gef.EditPart;
import org.eclipse.jst.pagedesigner.dom.DOMRefPosition;
import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
import org.eclipse.jst.pagedesigner.parts.NodeEditPart;
/**
* @author mengbo
*/
public class DefaultPositionRule implements IPositionRule {
protected IPositionMediator _mediator;
protected ActionData _actionData;
/**
*
*/
public DefaultPositionRule(IPositionMediator mediator, ActionData actionData) {
super();
_mediator = mediator;
if (_actionData != null) {
_actionData = actionData;
} else {
_actionData = new ActionData(ActionData.UNKNOWN, new Object());
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#hasEditableArea(org.w3c.dom.Node)
*/
public boolean hasEditableArea(Target target) {
return true;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#isEditable(org.eclipse.gef.EditPart)
*/
public boolean isEditable(Target target) {
return true;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#isTransparent(org.eclipse.gef.EditPart,
* org.eclipse.draw2d.geometry.Point)
*/
public boolean canReference(Target target, boolean atRight) {
return true;
}
/**
* If container is inEditable and can be referenced, the position is
* invalid, otherwise as default the position is valid. (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#isValidPosition(org.eclipse.jst.pagedesigner.dom.IDOMPosition)
*/
public boolean isValidPosition(IDOMPosition position) {
boolean result = isEditable(new Target(position.getContainerNode()));
if (result) {
if (position.getOffset() == 0
|| position.getOffset() == position.getContainerNode()
.getChildNodes().getLength()) {
result = true;
} else {
boolean dir;
Target target = null;
if (position instanceof DOMRefPosition) {
target = new Target(((DOMRefPosition) position)
.getReferenceNode());
dir = ((DOMRefPosition) position).isForward();
result = canReference(target, dir);
}
}
}
return result;
}
/**
* @param host
* @param tagName
* @return
*/
public static boolean isWidget(EditPart host) {
if (host instanceof NodeEditPart) {
return ((NodeEditPart) host).isWidget();
} else {
return false;
}
}
}
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