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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.area.inline;
import java.util.List;
import java.util.Iterator;
import org.apache.fop.area.Area;
/**
* Inline parent area.
* This is an inline area that can have other inlines as children.
*/
public class InlineParent extends InlineArea {
private static final long serialVersionUID = -3047168298770354813L;
/**
* The list of inline areas added to this inline parent.
*/
protected List<InlineArea> inlines = new java.util.ArrayList<InlineArea>();
/** Controls whether the IPD is automatically adjusted based on the area's children. */
protected transient boolean autoSize;
/** The offset of the <q>beforest</q> child area of this area. */
protected int minChildOffset;
/**
* The offset of the <q>afterest</q> child area of this area. Offset from the
* before-edge of this area's content-rectangle and the after-edge of the child area's
* allocation-rectangle.
*/
private int maxAfterEdge;
@Override
public void addChildArea(Area c) {
assert c instanceof InlineArea;
if (inlines.size() == 0) {
autoSize = (getIPD() == 0);
}
InlineArea childArea = (InlineArea) c;
inlines.add(childArea);
// set the parent area for the child area
childArea.setParentArea(this);
if (autoSize) {
increaseIPD(childArea.getAllocIPD());
}
updateLevel ( childArea.getBidiLevel() );
int childOffset = childArea.getVirtualOffset();
minChildOffset = Math.min(minChildOffset, childOffset);
maxAfterEdge = Math.max(maxAfterEdge, childOffset + childArea.getVirtualBPD());
}
@Override
int getVirtualOffset() {
return getBlockProgressionOffset() + minChildOffset;
}
@Override
int getVirtualBPD() {
return maxAfterEdge - minChildOffset;
}
/**
* Get the child areas for this inline parent.
*
* @return the list of child areas
*/
public List<InlineArea> getChildAreas() {
return inlines;
}
/**
* recursively apply the variation factor to all descendant areas
* @param variationFactor the variation factor that must be applied to adjustments
* @param lineStretch the total stretch of the line
* @param lineShrink the total shrink of the line
* @return true if there is an UnresolvedArea descendant
*/
@Override
public boolean applyVariationFactor(double variationFactor,
int lineStretch, int lineShrink) {
boolean hasUnresolvedAreas = false;
int cumulativeIPD = 0;
// recursively apply variation factor to descendant areas
for (int i = 0, len = inlines.size(); i < len; i++) {
InlineArea inline = inlines.get(i);
hasUnresolvedAreas |= inline.applyVariationFactor(
variationFactor, lineStretch, lineShrink);
cumulativeIPD += inline.getIPD(); //Update this area's IPD based on changes to children
}
setIPD(cumulativeIPD);
return hasUnresolvedAreas;
}
/**
* Reset bidirectionality level of all children to default (-1),
* signalling that they will inherit the level of their parent text area.
*/
public void resetChildrenLevel() {
for ( Iterator it = inlines.iterator(); it.hasNext();) {
( (InlineArea) it.next() ) .resetBidiLevel();
}
}
private void updateLevel ( int newLevel ) {
if ( newLevel >= 0 ) {
int curLevel = getBidiLevel();
if ( curLevel >= 0 ) {
if ( newLevel < curLevel ) {
setBidiLevel ( newLevel );
}
} else {
setBidiLevel ( newLevel );
}
}
}
}
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