| /* |
| * 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; |
| |
| // Java |
| import java.awt.Rectangle; |
| |
| import org.apache.fop.apps.FOPException; |
| import org.apache.fop.datatypes.PercentBaseContext; |
| import org.apache.fop.fo.FONode; |
| import org.apache.fop.fo.PropertyList; |
| import org.apache.fop.traits.WritingMode; |
| |
| /** |
| * Abstract base class for <a href="http://www.w3.org/TR/xsl/#fo_region-before"> |
| * <code>fo:region-before</code></a> and <a href="http://www.w3.org/TR/xsl/#fo_region-after"> |
| * <code>fo:region-after</code></a>. |
| */ |
| public abstract class RegionBA extends SideRegion { |
| // The value of properties relevant for fo:region-[before|after]. |
| private int precedence; |
| // End of property values |
| |
| /** |
| * Create a RegionBA instance that is a child of the |
| * given parent {@link FONode}. |
| * @param parent the {@link FONode} that is to be the parent |
| */ |
| protected RegionBA(FONode parent) { |
| super(parent); |
| } |
| |
| /** {@inheritDoc} */ |
| public void bind(PropertyList pList) throws FOPException { |
| super.bind(pList); |
| precedence = pList.get(PR_PRECEDENCE).getEnum(); |
| } |
| |
| /** |
| * Get the value of the <code>precedence</code> property. |
| * @return the "precedence" property |
| */ |
| public int getPrecedence() { |
| return precedence; |
| } |
| |
| /** |
| * 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 vpRefRect viewport reference rectangle |
| * @param wm writing mode |
| * @param siblingContext the context to use to resolve extent on siblings |
| */ |
| protected void adjustIPD |
| ( Rectangle vpRefRect, WritingMode wm, PercentBaseContext siblingContext ) { |
| int offset = 0; |
| RegionStart start = (RegionStart) getSiblingRegion(FO_REGION_START); |
| if (start != null) { |
| offset = start.getExtent().getValue(siblingContext); |
| vpRefRect.translate(offset, 0); // move (x, y) units |
| } |
| RegionEnd end = (RegionEnd) getSiblingRegion(FO_REGION_END); |
| if (end != null) { |
| offset += end.getExtent().getValue(siblingContext); |
| } |
| // [TBD] WRITING MODE ALERT |
| if (offset > 0) { |
| if (wm == WritingMode.LR_TB || wm == WritingMode.RL_TB) { |
| vpRefRect.width -= offset; |
| } else { |
| vpRefRect.height -= offset; |
| } |
| } |
| } |
| } |
| |