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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.layoutmgr.inline;
import java.util.LinkedList;
import java.util.List;
import org.apache.fop.fo.flow.Float;
import org.apache.fop.layoutmgr.FloatContentLayoutManager;
import org.apache.fop.layoutmgr.InlineKnuthSequence;
import org.apache.fop.layoutmgr.KnuthElement;
import org.apache.fop.layoutmgr.KnuthPossPosIter;
import org.apache.fop.layoutmgr.KnuthSequence;
import org.apache.fop.layoutmgr.LayoutContext;
import org.apache.fop.layoutmgr.LayoutManager;
import org.apache.fop.layoutmgr.Position;
import org.apache.fop.layoutmgr.PositionIterator;
import org.apache.fop.layoutmgr.SpaceResolver;
public class FloatLayoutManager extends InlineStackingLayoutManager {
private FloatContentLayoutManager floatContentLM;
private KnuthInlineBox anchor;
private List<KnuthElement> floatContentKnuthElements;
private Float floatContent;
private boolean floatContentAreaAdded;
public FloatLayoutManager(Float node) {
super(node);
floatContent = node;
}
protected LayoutManager getChildLM() {
return null;
}
public LinkedList getNextKnuthElements(LayoutContext context, int alignment) {
if (!floatContentAreaAdded && !floatContent.isDisabled()) {
floatContentLM = new FloatContentLayoutManager(floatContent);
floatContentLM.setParent(this);
floatContentLM.initialize();
floatContentKnuthElements = floatContentLM.getNextKnuthElements(context, alignment);
SpaceResolver.resolveElementList(floatContentKnuthElements);
}
// the only knuth element is a zero width and height knuth box
LinkedList knuthElements = new LinkedList();
KnuthSequence seq = new InlineKnuthSequence();
anchor = new KnuthInlineBox(0, null, null, true);
if (!floatContentAreaAdded) {
anchor.setFloatContentLM(floatContentLM);
}
anchor.setPosition(notifyPos(new Position(this)));
seq.add(anchor);
knuthElements.add(seq);
setFinished(true);
return knuthElements;
}
public void addAreas(PositionIterator posIter, LayoutContext context) {
// "Unwrap" the NonLeafPositions stored in posIter
LinkedList positionList = new LinkedList();
Position pos = null;
while (posIter.hasNext()) {
pos = posIter.next();
if (pos != null && pos.getPosition() != null) {
positionList.add(pos.getPosition());
}
}
}
public void processAreas(LayoutContext context) {
PositionIterator contentPosIter = new KnuthPossPosIter(floatContentKnuthElements, 0,
floatContentKnuthElements.size());
floatContentLM.addAreas(contentPosIter, context);
floatContentAreaAdded = true;
anchor.setFloatContentLM(null);
}
}
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