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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.pagination;
// Java
import java.awt.Rectangle;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FOTreeVisitor;
/**
* Abstract base class for fo:region-before and fo:region-after.
*/
public abstract class RegionBA extends RegionBASE {
private boolean bPrecedence;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
protected RegionBA(FONode parent, int regionId) {
super(parent, regionId);
}
/**
* @see org.apache.fop.fo.pagination.Region#getPrecedence()
*/
public boolean getPrecedence() {
return bPrecedence;
}
/**
* @see org.apache.fop.fo.FONode#end()
*/
public void end() {
super.end();
bPrecedence =
(this.propertyList.get(PR_PRECEDENCE).getEnum() == Precedence.TRUE);
}
/**
* Adjust the viewport reference rectangle for a region as a function
* of precedence.
* If precedence is false on a before or after region, its
* inline-progression-dimension is limited by the extent of the start
* and end regions if they are present.
* @param vpRect viewport rectangle
* @param wm writing mode
*/
protected void adjustIPD(Rectangle vpRect, int wm) {
int offset = 0;
Region start = getSiblingRegion(Region.START);
if (start != null) {
offset = start.getExtent();
vpRect.translate(offset, 0);
}
Region end = getSiblingRegion(Region.END);
if (end != null) {
offset += end.getExtent();
}
if (offset > 0) {
if (wm == WritingMode.LR_TB || wm == WritingMode.RL_TB) {
vpRect.width -= offset;
} else {
vpRect.height -= offset;
}
}
}
public void acceptVisitor(FOTreeVisitor fotv) {
fotv.serveRegionBA(this);
}
}
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