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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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;
import java.awt.Rectangle;
import org.apache.fop.datatypes.FODimension;
import org.apache.fop.datatypes.LengthBase;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.FONode;
/**
* Class modelling the <a href="http://www.w3.org/TR/xsl/#fo_region-before">
* <code>fo:region-before</code></a> object.
*/
public class RegionBefore extends RegionBA {
/**
* Create a RegionBefore instance that is a child of the
* given parent {@link FONode}.
* @param parent the {@link FONode} that is to be the parent
*/
public RegionBefore(FONode parent) {
super(parent);
}
/** {@inheritDoc} */
protected String getDefaultRegionName() {
return "xsl-region-before";
}
/** {@inheritDoc} */
public Rectangle getViewportRectangle (FODimension reldims) {
/* Special rules apply to resolving extent as values are resolved relative
* to the page size and reference orientation.
*/
PercentBaseContext pageWidthContext = getPageWidthContext(LengthBase.CUSTOM_BASE);
PercentBaseContext pageHeightContext = getPageHeightContext(LengthBase.CUSTOM_BASE);
PercentBaseContext neighbourContext;
Rectangle vpRect;
// [TBD] WRITING MODE ALERT
switch ( getWritingMode().getEnumValue() ) {
case Constants.EN_TB_LR:
case Constants.EN_TB_RL:
neighbourContext = pageHeightContext;
vpRect = new Rectangle(0, 0, getExtent().getValue(pageWidthContext), reldims.ipd);
break;
case Constants.EN_LR_TB:
case Constants.EN_RL_TB:
default:
neighbourContext = pageWidthContext;
vpRect = new Rectangle(0, 0, reldims.ipd, getExtent().getValue(pageHeightContext));
break;
}
if (getPrecedence() == EN_FALSE) {
adjustIPD(vpRect, layoutMaster.getWritingMode(), neighbourContext);
}
return vpRect;
}
/** {@inheritDoc} */
public String getLocalName() {
return "region-before";
}
/**
* {@inheritDoc}
* @return {@link org.apache.fop.fo.Constants#FO_REGION_BEFORE}
*/
public int getNameId() {
return FO_REGION_BEFORE;
}
}
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