| /* |
| * Copyright 1999-2005 The Apache Software Foundation. |
| * |
| * Licensed 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; |
| |
| import org.apache.fop.fo.flow.PageNumberCitation; |
| 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.UnresolvedPageNumber; |
| import org.apache.fop.area.inline.TextArea; |
| import org.apache.fop.fonts.Font; |
| |
| /** |
| * LayoutManager for the fo:page-number-citation formatting object |
| */ |
| public class PageNumberCitationLayoutManager extends LeafNodeLayoutManager { |
| |
| private PageNumberCitation fobj; |
| Font font = null; |
| |
| // whether the page referred to by the citation has been resolved yet |
| private boolean resolved = false; |
| |
| /** |
| * Constructor |
| * |
| * @param node the formatting object that creates this area |
| * @todo better retrieval of font info |
| */ |
| public PageNumberCitationLayoutManager(PageNumberCitation node) { |
| super(node); |
| fobj = node; |
| font = fobj.getCommonFont().getFontState(fobj.getFOEventHandler().getFontInfo()); |
| } |
| |
| public InlineArea get(LayoutContext context) { |
| curArea = getPageNumberCitationInlineArea(parentLM); |
| return curArea; |
| } |
| |
| public void addAreas(PositionIterator posIter, LayoutContext context) { |
| super.addAreas(posIter, context); |
| if (!resolved) { |
| getPSLM().addUnresolvedArea(fobj.getRefId(), (Resolvable) curArea); |
| } |
| } |
| |
| protected void offsetArea(LayoutContext context) { |
| curArea.setOffset(context.getBaseline()); |
| } |
| |
| /** |
| * if id can be resolved then simply return a word, otherwise |
| * return a resolvable area |
| */ |
| private InlineArea getPageNumberCitationInlineArea(LayoutManager parentLM) { |
| PageViewport page = getPSLM().getFirstPVWithID(fobj.getRefId()); |
| InlineArea inline = null; |
| if (page != null) { |
| String str = page.getPageNumberString(); |
| // get page string from parent, build area |
| TextArea text = new TextArea(); |
| inline = text; |
| int width = getStringWidth(str); |
| text.setTextArea(str); |
| inline.setIPD(width); |
| inline.setBPD(font.getAscender() - font.getDescender()); |
| inline.setOffset(font.getAscender()); |
| |
| inline.addTrait(Trait.FONT_NAME, font.getFontName()); |
| inline.addTrait(Trait.FONT_SIZE, |
| new Integer(font.getFontSize())); |
| resolved = true; |
| } else { |
| resolved = false; |
| inline = new UnresolvedPageNumber(fobj.getRefId()); |
| String str = "MMM"; // reserve three spaces for page number |
| int width = getStringWidth(str); |
| inline.setIPD(width); |
| inline.setBPD(font.getAscender() - font.getDescender()); |
| inline.setOffset(font.getAscender()); |
| |
| inline.addTrait(Trait.FONT_NAME, font.getFontName()); |
| inline.addTrait(Trait.FONT_SIZE, new Integer(font.getFontSize())); |
| } |
| TraitSetter.addTextDecoration(inline, fobj.getTextDecoration()); |
| |
| return inline; |
| } |
| |
| /** |
| * @param str string to be measured |
| * @return width (in millipoints ??) 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; |
| } |
| |
| protected void addId() { |
| getPSLM().addIDToPage(fobj.getId()); |
| } |
| } |
| |