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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.ArrayList;
import java.util.LinkedList;
import java.util.List;
import org.apache.fop.area.Area;
import org.apache.fop.area.Trait;
import org.apache.fop.area.inline.Container;
import org.apache.fop.area.inline.InlineViewport;
import org.apache.fop.fo.flow.InlineContainer;
import org.apache.fop.fo.properties.CommonBorderPaddingBackground;
import org.apache.fop.fo.properties.LengthRangeProperty;
import org.apache.fop.fo.properties.Property;
import org.apache.fop.fonts.Font;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.fonts.FontTriplet;
import org.apache.fop.layoutmgr.AbstractLayoutManager;
import org.apache.fop.layoutmgr.ElementListUtils;
import org.apache.fop.layoutmgr.InlineKnuthSequence;
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.ListElement;
import org.apache.fop.layoutmgr.Position;
import org.apache.fop.layoutmgr.PositionIterator;
import org.apache.fop.layoutmgr.SpaceResolver;
import org.apache.fop.layoutmgr.TraitSetter;
/**
* This creates a single inline container area after
* laying out the child block areas. All footnotes, floats
* and id areas are maintained for later retrieval.
*/
public class InlineContainerLayoutManager extends AbstractLayoutManager implements InlineLevelLayoutManager {
private CommonBorderPaddingBackground borderProps;
private int alignmentBaseline = EN_BASELINE;
private int contentAreaIPD;
private int contentAreaBPD;
private List<ListElement> childElements;
private InlineViewport currentViewport;
private Container referenceArea;
public InlineContainerLayoutManager(InlineContainer node) {
super(node);
}
@Override
public void initialize() {
InlineContainer node = (InlineContainer) fobj;
borderProps = node.getCommonBorderPaddingBackground();
}
@Override
public List<KnuthSequence> getNextKnuthElements(LayoutContext context, int alignment) {
determineIPD(context);
LayoutContext childLC = LayoutContext.offspringOf(context); // TODO copyOf?
childLC.setRefIPD(contentAreaIPD);
childElements = getChildKnuthElements(childLC, alignment); // TODO which alignment?
determineBPD();
AlignmentContext alignmentContext = makeAlignmentContext(context); // TODO correct?
Position position = new Position(this, 0);
KnuthSequence knuthSequence = new InlineKnuthSequence();
knuthSequence.add(new KnuthInlineBox(contentAreaIPD, alignmentContext, position, false));
List<KnuthSequence> knuthElements = new ArrayList<KnuthSequence>(1);
knuthElements.add(knuthSequence);
setFinished(true);
return knuthElements;
}
private void determineIPD(LayoutContext layoutContext) {
LengthRangeProperty ipd = ((InlineContainer) fobj).getInlineProgressionDimension();
Property optimum = ipd.getOptimum(this); // TODO percent base context
if (optimum.isAuto()) {
contentAreaIPD = layoutContext.getRefIPD();
InlineLevelEventProducer eventProducer = InlineLevelEventProducer.Provider.get(
fobj.getUserAgent().getEventBroadcaster());
eventProducer.inlineContainerAutoIPDNotSupported(this, contentAreaIPD / 1000f);
} else {
contentAreaIPD = optimum.getLength().getValue(this); // TODO percent base context
}
}
private void determineBPD() {
LengthRangeProperty bpd = ((InlineContainer) fobj).getBlockProgressionDimension();
Property optimum = bpd.getOptimum(this); // TODO percent base context
if (optimum.isAuto()) {
contentAreaBPD = ElementListUtils.calcContentLength(childElements);
} else {
contentAreaBPD = optimum.getLength().getValue(this); // TODO percent base context
}
}
private List<ListElement> getChildKnuthElements(LayoutContext layoutContext, int alignment) {
List<ListElement> allChildElements = new LinkedList<ListElement>();
LayoutManager childLM;
while ((childLM = getChildLM()) != null) {
LayoutContext childLC = LayoutContext.offspringOf(layoutContext); // TODO copyOf? newInstance?
childLC.setRefIPD(layoutContext.getRefIPD());
@SuppressWarnings("unchecked")
List<ListElement> childElements = childLM.getNextKnuthElements(childLC, alignmentBaseline);
allChildElements.addAll(childElements);
// TODO breaks, keeps, empty content
}
SpaceResolver.resolveElementList(allChildElements);
// TODO break-before, break-after
return allChildElements;
}
@Override
public void addAreas(PositionIterator posIter, LayoutContext context) {
Position inlineContainerPosition = null;
while (posIter.hasNext()) {
Position pos = posIter.next();
if (pos.getLM() == this) {
inlineContainerPosition = pos;
}
}
addId();
// addMarkersToPage(
// true,
// true,
// lastPos == null || isLast(lastPos));
if (inlineContainerPosition != null) {
LayoutManager childLM;
KnuthPossPosIter childPosIter = new KnuthPossPosIter(childElements);
while ((childLM = childPosIter.getNextChildLM()) != null) {
LayoutContext childLC = LayoutContext.copyOf(context); // TODO correct?
childLM.addAreas(childPosIter, childLC);
}
}
// addMarkersToPage(
// false,
// true,
// lastPos == null || isLast(lastPos));
// boolean isLast = (context.isLastArea() && prevLM == lastChildLM);
// context.setFlags(LayoutContext.LAST_AREA, isLast);
}
@Override
public Area getParentArea(Area childArea) {
if (referenceArea == null) {
referenceArea = new Container();
referenceArea.addTrait(Trait.IS_REFERENCE_AREA, Boolean.TRUE);
TraitSetter.setProducerID(referenceArea, fobj.getId());
referenceArea.setIPD(contentAreaIPD);
currentViewport = new InlineViewport(referenceArea);
currentViewport.addTrait(Trait.IS_VIEWPORT_AREA, Boolean.TRUE);
currentViewport.setIPD(getContentAreaIPD());
currentViewport.setBPD(getContentAreaBPD());
TraitSetter.setProducerID(currentViewport, fobj.getId());
TraitSetter.addBorders(currentViewport,
borderProps,
false, false, false, false, this);
TraitSetter.addPadding(currentViewport,
borderProps,
false, false, false, false, this);
TraitSetter.addBackground(currentViewport,
borderProps,
this);
currentViewport.setClip(needClip());
currentViewport.setContentPosition(
new java.awt.geom.Rectangle2D.Float(0, 0, getContentAreaIPD(), getContentAreaBPD()));
getParent().addChildArea(currentViewport);
}
return referenceArea;
}
@Override
public int getContentAreaIPD() {
return contentAreaIPD;
}
@Override
public int getContentAreaBPD() {
return contentAreaBPD;
}
@Override
public void addChildArea(Area childArea) {
referenceArea.addChildArea(childArea);
}
private boolean needClip() {
int overflow = ((InlineContainer) fobj).getOverflow();
return (overflow == EN_HIDDEN || overflow == EN_ERROR_IF_OVERFLOW);
}
protected AlignmentContext makeAlignmentContext(LayoutContext context) {
InlineContainer ic = (InlineContainer) fobj;
FontInfo fi = fobj.getFOEventHandler().getFontInfo();
FontTriplet[] fontkeys = ic.getCommonFont().getFontState(fi);
Font fs = fi.getFontInstance(fontkeys[0], ic.getCommonFont().fontSize.getValue(this));
return new AlignmentContext(fs, ic.getLineHeight().getOptimum(this).getLength().getValue(this), // TODO
context.getWritingMode());
}
public List addALetterSpaceTo(List oldList) {
throw new UnsupportedOperationException("Not implemented");
}
public List addALetterSpaceTo(List oldList, int depth) {
throw new UnsupportedOperationException("Not implemented");
}
public String getWordChars(Position pos) {
throw new UnsupportedOperationException("Not implemented");
}
public void hyphenate(Position pos, HyphContext hyphContext) {
throw new UnsupportedOperationException("Not implemented");
}
public boolean applyChanges(List oldList) {
throw new UnsupportedOperationException("Not implemented");
}
public boolean applyChanges(List oldList, int depth) {
throw new UnsupportedOperationException("Not implemented");
}
public List getChangedKnuthElements(List oldList, int alignment, int depth) {
throw new UnsupportedOperationException("Not implemented");
}
}
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