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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.Resolvable;
- 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.PositionIterator;
- import org.apache.fop.layoutmgr.TraitSetter;
-
- /**
- * 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 */
- protected boolean resolved = false;
-
- /**
- * 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()
- );
- }
-
- /** {@inheritDoc} */
- public InlineArea get(LayoutContext context) {
- curArea = getPageNumberCitationInlineArea();
- return curArea;
- }
-
- /**
- * {@inheritDoc}
- * , LayoutContext)
- */
- public void addAreas(PositionIterator posIter, LayoutContext context) {
- super.addAreas(posIter, context);
- if (!resolved) {
- getPSLM().addUnresolvedArea(fobj.getRefId(), (Resolvable) curArea);
- }
- }
-
- /**
- * If id can be resolved then simply return a text area, otherwise
- * return a resolvable area
- *
- * @return a corresponding InlineArea
- */
- private InlineArea getPageNumberCitationInlineArea() {
- PageViewport page = getPSLM().getFirstPVWithID(fobj.getRefId());
- TextArea text;
- if (page != null) {
- String str = page.getPageNumberString();
- // get page string from parent, build area
- text = new TextArea();
- int width = getStringWidth(str);
- text.addWord(str, 0);
- text.setIPD(width);
- resolved = true;
- } else {
- resolved = false;
- text = new UnresolvedPageNumber(fobj.getRefId(), font);
- String str = "MMM"; // reserve three spaces for page number
- int width = getStringWidth(str);
- text.setIPD(width);
- }
- updateTextAreaTraits(text);
-
- return text;
- }
-
- /**
- * Updates the traits for the generated text area.
- * @param text the text area
- */
- protected void updateTextAreaTraits(TextArea text) {
- TraitSetter.setProducerID(text, fobj.getId());
- text.setBPD(font.getAscender() - font.getDescender());
- text.setBaselineOffset(font.getAscender());
- TraitSetter.addFontTraits(text, font);
- text.addTrait(Trait.COLOR, fobj.getColor());
- TraitSetter.addStructureTreeElement(text, fobj.getStructureTreeElement());
- TraitSetter.addTextDecoration(text, fobj.getTextDecoration());
- }
-
- /**
- * @param str string to be measured
- * @return width (in millipoints ??) of the string
- */
- protected int getStringWidth(String str) {
- int width = 0;
- for (int count = 0; count < str.length(); count++) {
- width += font.getCharWidth(str.charAt(count));
- }
- return width;
- }
-
- }
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