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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 citation;
-
- /** 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);
- citation = node;
- }
-
- /** {@inheritDoc} */
- public void initialize() {
- FontInfo fi = citation.getFOEventHandler().getFontInfo();
- FontTriplet[] fontkeys = citation.getCommonFont().getFontState(fi);
- font = fi.getFontInstance(fontkeys[0], citation.getCommonFont().fontSize.getValue(this));
- setCommonBorderPaddingBackground(citation.getCommonBorderPaddingBackground());
- }
-
- /**
- * {@inheritDoc}
- */
- protected AlignmentContext makeAlignmentContext(LayoutContext context) {
- return new AlignmentContext(
- font
- , citation.getLineHeight().getOptimum(this).getLength().getValue(this)
- , citation.getAlignmentAdjust()
- , citation.getAlignmentBaseline()
- , citation.getBaselineShift()
- , citation.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, citation.getStructureTreeElement());
- }
- return area;
- }
-
- private InlineArea getPageNumberCitationArea() {
- TextArea text;
- if (resolved) {
- text = new TextArea();
- int bidiLevel = getBidiLevel();
- text.setBidiLevel(bidiLevel);
- text.addWord(citationString, getStringWidth(citationString), null, null, null, 0);
- } else {
- UnresolvedPageNumber unresolved = new UnresolvedPageNumber(citation.getRefId(), font,
- getReferenceType());
- getPSLM().addUnresolvedArea(citation.getRefId(), unresolved);
- text = unresolved;
- }
- text.setChangeBarList(getChangeBarList());
- 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, citation.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, citation.getColor());
- TraitSetter.addTextDecoration(text, citation.getTextDecoration());
- }
-
- /**
- * @return bidi level governing abstract page number citation
- */
- protected int getBidiLevel() {
- return citation.getBidiLevel();
- }
-
- }
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