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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 org.apache.fop.area.PageViewport;
import org.apache.fop.area.Trait;
import org.apache.fop.area.inline.InlineArea;
import org.apache.fop.area.inline.TextArea;
import org.apache.fop.area.inline.UnresolvedPageNumber;
import org.apache.fop.fo.flow.AbstractPageNumberCitation;
import org.apache.fop.fonts.Font;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.fonts.FontTriplet;
import org.apache.fop.layoutmgr.LayoutContext;
import org.apache.fop.layoutmgr.TraitSetter;
import org.apache.fop.traits.MinOptMax;
/**
* LayoutManager for the fo:page-number-citation(-last) formatting object
*/
public abstract class AbstractPageNumberCitationLayoutManager extends LeafNodeLayoutManager {
/** The page number citation object */
protected AbstractPageNumberCitation fobj;
/** Font for the page-number-citation */
protected Font font;
/** Indicates whether the page referred to by the citation has been resolved yet */
private boolean resolved;
private String citationString;
/**
* Constructor
*
* @param node the formatting object that creates this area
* TODO better retrieval of font info
*/
public AbstractPageNumberCitationLayoutManager(AbstractPageNumberCitation node) {
super(node);
fobj = node;
}
/** {@inheritDoc} */
public void initialize() {
FontInfo fi = fobj.getFOEventHandler().getFontInfo();
FontTriplet[] fontkeys = fobj.getCommonFont().getFontState(fi);
font = fi.getFontInstance(fontkeys[0], fobj.getCommonFont().fontSize.getValue(this));
setCommonBorderPaddingBackground(fobj.getCommonBorderPaddingBackground());
}
/**
* {@inheritDoc}
*/
protected AlignmentContext makeAlignmentContext(LayoutContext context) {
return new AlignmentContext(
font
, fobj.getLineHeight().getOptimum(this).getLength().getValue(this)
, fobj.getAlignmentAdjust()
, fobj.getAlignmentBaseline()
, fobj.getBaselineShift()
, fobj.getDominantBaseline()
, context.getAlignmentContext()
);
}
@Override
protected MinOptMax getAllocationIPD(int refIPD) {
determineCitationString();
int ipd = getStringWidth(citationString);
return MinOptMax.getInstance(ipd);
}
private void determineCitationString() {
assert citationString == null;
PageViewport page = getCitedPage();
if (page != null) {
resolved = true;
citationString = page.getPageNumberString();
} else {
resolved = false;
citationString = "MMM"; // Use a place holder
}
}
private int getStringWidth(String str) {
int width = 0;
for (int count = 0; count < str.length(); count++) {
width += font.getCharWidth(str.charAt(count));
}
return width;
}
protected abstract PageViewport getCitedPage();
@Override
protected InlineArea getEffectiveArea(LayoutContext layoutContext) {
InlineArea area = getPageNumberCitationArea();
if (!layoutContext.treatAsArtifact()) {
TraitSetter.addStructureTreeElement(area, fobj.getStructureTreeElement());
}
return area;
}
private InlineArea getPageNumberCitationArea() {
TextArea text;
if (resolved) {
text = new TextArea();
text.addWord(citationString, 0);
} else {
UnresolvedPageNumber unresolved = new UnresolvedPageNumber(fobj.getRefId(), font,
getReferenceType());
getPSLM().addUnresolvedArea(fobj.getRefId(), unresolved);
text = unresolved;
}
setTraits(text);
return text;
}
/**
* @return {@link org.apache.fop.area.inline.UnresolvedPageNumber#FIRST} or
* {@link org.apache.fop.area.inline.UnresolvedPageNumber#LAST}
*/
protected abstract boolean getReferenceType();
private void setTraits(TextArea text) {
TraitSetter.setProducerID(text, fobj.getId());
int bidiLevel = getBidiLevel();
text.setBidiLevel(bidiLevel);
int width = getStringWidth(citationString); // TODO: [GA] !I18N!
text.setIPD(width); // TODO: [GA] !I18N!
text.setBPD(font.getAscender() - font.getDescender());
text.setBaselineOffset(font.getAscender());
TraitSetter.addFontTraits(text, font);
text.addTrait(Trait.COLOR, fobj.getColor());
TraitSetter.addTextDecoration(text, fobj.getTextDecoration());
}
/**
* @return bidi level governing abstract page number citation
*/
protected int getBidiLevel() {
return fobj.getBidiLevel();
}
}
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