/*******************************************************************************
* 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.EditModelQuery;
import org.eclipse.jst.pagedesigner.viewer.DesignPosition;
import org.eclipse.jst.pagedesigner.viewer.DesignRefPosition;
import org.eclipse.jst.pagedesigner.viewer.EditPartPositionHelper;
import org.w3c.dom.Text;
/**
* For whitespaces 1. If there is sibling can be reference, then we don't
* reference whitespace text. 2. Position can't be between whitespace text.
*
* @author mengbo
*/
public class WhitespacePositionMoveRule extends DefaultPositionRule implements
IMovementRule {
/**
* @param actionData
*/
public WhitespacePositionMoveRule(ActionData actionData) {
super(actionData);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IMovementRule#canEnter(org.eclipse.gef.EditPart)
*/
public boolean allowsMoveIn(Target target) {
if (EditModelQuery.isTransparentText(target.getNode())) {
return false;
}
return true;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IMovementRule#canMoveOut(org.eclipse.gef.EditPart)
*/
public boolean allowsMoveOut(Target target) {
return true;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#canReference(org.eclipse.jst.pagedesigner.caret.Target)
*/
public boolean canReference(Target target, boolean atRight) {
boolean result = super.canReference(target, atRight);
if (EditModelQuery.isText(target.getNode())) {
if (((Text) target.getNode()).getData().length() == 0) {
result = false;
} else if (EditModelQuery.isTransparentText(target.getNode())) {
DesignPosition position = new DesignRefPosition(target
.getPart(), atRight);
if (EditPartPositionHelper.getConcretePart(position, atRight) != null) {
result = true;
} else {
EditPart part = EditPartPositionHelper.getNextConcretPart(
position, atRight);
EditPart oppPart = EditPartPositionHelper
.getNextConcretPart(position, !atRight);
if (part == null) {
if (oppPart == null) {
result = true;
}
}
result = false;
}
}
}
return result;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#hasEditableArea(org.eclipse.jst.pagedesigner.caret.Target)
*/
public boolean hasEditableArea(Target target) {
if (EditModelQuery.isTransparentText(target.getNode())) {
return false;
}
return super.hasEditableArea(target);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.caret.IPositionRule#isEditable(org.eclipse.jst.pagedesigner.caret.Target)
*/
public boolean isEditable(Target target) {
if (EditModelQuery.isTransparentText(target.getNode())) {
return false;
}
return super.isEditable(target);
}
// /*
// * (non-Javadoc)
// *
// * @see
// org.eclipse.jst.pagedesigner.caret.IPositionRule#isValidPosition(org.eclipse.jst.pagedesigner.dom.IDOMPosition)
// */
// public boolean isValidPosition(IDOMPosition position)
// {
// Node node = null;
// if (position instanceof DOMRefPosition)
// {
// node = ((DOMRefPosition)position).getReferenceNode();
// } else if (position.isText())
// {
// node = position.getContainerNode();
// } else {
// return super.isValidPosition(position);
// }
// if (EditModelQuery.isTransparentText(position.getContainerNode()))
// {
// if (node.getPreviousSibling() != null)
// {
// node = node.getPreviousSibling();
// return _mediator.canReference(new Target(node), true);
// }
// else if (node.getNextSibling() != null)
// {
// node = node.getNextSibling();
// return _mediator.canReference(new Target(node), false);
// }
// }
// return super.isValidPosition(position);
// }
}