| /* |
| * 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.LayoutManager; |
| 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 word, otherwise |
| * return a resolvable area |
| * |
| * @param parentLM the parent LayoutManager |
| * @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.addPtr(text, fobj.getPtr()); // used for accessibility |
| 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; |
| } |
| |
| } |
| |