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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.datatypes.FODimension;
import org.apache.fop.datatypes.LengthBase;
import org.apache.fop.datatypes.SimplePercentBaseContext;
import org.apache.fop.fo.FONode;
/**
* The fo:region-before element.
*/
public class RegionBefore extends RegionBA {
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public RegionBefore(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.pagination.Region#getDefaultRegionName()
*/
protected String getDefaultRegionName() {
return "xsl-region-before";
}
/**
* @see org.apache.fop.fo.pagination.Region#getViewportRectangle(FODimension)
*/
public Rectangle getViewportRectangle (FODimension reldims, FODimension pageViewPortRect) {
// Depends on extent, precedence and writing mode
// This should return rectangle in writing-mode coordinates relative
// to the page-reference area rectangle
// This means the origin is (start, before) and the dimensions are (ipd,bpd)
// Before is always 0, start depends on extent
// ipd depends on precedence, bpd=extent
/* Special rules apply to resolving extent.
* In the property subsystem the extent property is configured to
* using BLOCK_WIDTH as its percent base.
* However, depending on the writing mode extent import resolved either
* against the page width or the page height.
*/
Rectangle vpRect;
SimplePercentBaseContext pageWidthContext
= new SimplePercentBaseContext(null, LengthBase.CUSTOM_BASE, pageViewPortRect.ipd);
SimplePercentBaseContext pageHeightContext
= new SimplePercentBaseContext(null, LengthBase.CUSTOM_BASE, pageViewPortRect.bpd);
SimplePercentBaseContext neighbourContext;
if (getWritingMode() == EN_LR_TB || getWritingMode() == EN_RL_TB) {
neighbourContext = pageWidthContext;
vpRect = new Rectangle(0, 0, reldims.ipd, getExtent().getValue(pageHeightContext));
} else {
neighbourContext = pageHeightContext;
vpRect = new Rectangle(0, 0, getExtent().getValue(pageWidthContext), reldims.ipd);
}
if (getPrecedence() == EN_FALSE) {
adjustIPD(vpRect, getWritingMode(), neighbourContext);
}
return vpRect;
}
/**
* @see org.apache.fop.fo.FObj#getName()
*/
public String getName() {
return "fo:region-before";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_REGION_BEFORE;
}
}
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