| /* |
| * 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.fo.flow.PageNumber; |
| import org.apache.fop.fonts.Font; |
| import org.apache.fop.fonts.FontInfo; |
| import org.apache.fop.fonts.FontTriplet; |
| import org.apache.fop.area.inline.InlineArea; |
| import org.apache.fop.area.inline.TextArea; |
| import org.apache.fop.area.Trait; |
| import org.apache.fop.layoutmgr.LayoutContext; |
| import org.apache.fop.layoutmgr.TraitSetter; |
| import org.apache.fop.traits.MinOptMax; |
| |
| /** |
| * LayoutManager for the fo:page-number formatting object |
| */ |
| public class PageNumberLayoutManager extends LeafNodeLayoutManager { |
| |
| private PageNumber fobj; |
| private Font font; |
| |
| /** |
| * Constructor |
| * |
| * @param node the fo:page-number formatting object that creates the area |
| * TODO better null checking of node, font |
| */ |
| public PageNumberLayoutManager(PageNumber 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} |
| * #makeAlignmentContext(LayoutContext) |
| */ |
| 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) { |
| // get page string from parent, build area |
| TextArea text = new TextArea(); |
| String str = getCurrentPV().getPageNumberString(); |
| int width = getStringWidth(str); |
| text.addWord(str, 0); |
| text.setIPD(width); |
| 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()); |
| |
| return text; |
| } |
| |
| /** {@inheritDoc} */ |
| protected InlineArea getEffectiveArea() { |
| TextArea baseArea = (TextArea)curArea; |
| //TODO Maybe replace that with a clone() call or better, a copy constructor |
| //TODO or even better: delay area creation until addAreas() stage |
| //TextArea is cloned because the LM is reused in static areas and the area can't be. |
| TextArea ta = new TextArea(); |
| TraitSetter.setProducerID(ta, fobj.getId()); |
| ta.setIPD(baseArea.getIPD()); |
| ta.setBPD(baseArea.getBPD()); |
| ta.setOffset(baseArea.getOffset()); |
| ta.setBaselineOffset(baseArea.getBaselineOffset()); |
| ta.addTrait(Trait.COLOR, fobj.getColor()); //only to initialize the trait map |
| ta.getTraits().putAll(baseArea.getTraits()); |
| updateContent(ta); |
| return ta; |
| } |
| |
| private void updateContent(TextArea area) { |
| // get the page number of the page actually being built |
| area.removeText(); |
| area.addWord(getCurrentPV().getPageNumberString(), 0); |
| // update the ipd of the area |
| area.handleIPDVariation(getStringWidth(area.getText()) - area.getIPD()); |
| // update the width stored in the AreaInfo object |
| areaInfo.ipdArea = new MinOptMax(area.getIPD()); |
| } |
| |
| /** |
| * @param str string to be measured |
| * @return width of the string |
| */ |
| private int getStringWidth(String str) { |
| int width = 0; |
| for (int count = 0; count < str.length(); count++) { |
| width += font.getCharWidth(str.charAt(count)); |
| } |
| return width; |
| } |
| |
| } |
| |