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/*
* Copyright 1999-2004 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.Resolveable;
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:basic-link formatting object
*/
public class PageNumberCitationLayoutManager extends LeafNodeLayoutManager {
PageNumberCitation pncNode;
Font font = null;
/**
* Constructor
*
* @param node the formatting object that creates this area
* @todo better null checking font
*/
public PageNumberCitationLayoutManager(PageNumberCitation node) {
super(node);
font = node.getFontState();
pncNode = node;
}
public InlineArea get(LayoutContext context) {
curArea = getPageNumberCitationInlineArea(parentLM);
return curArea;
}
public void addAreas(PositionIterator posIter, LayoutContext context) {
super.addAreas(posIter, context);
if (pncNode.getUnresolved()) {
parentLM.addUnresolvedArea(pncNode.getRefId(),
(Resolveable) curArea);
}
}
protected void offsetArea(LayoutContext context) {
curArea.setOffset(context.getBaseline());
}
/**
* if id can be resolved then simply return a word, otherwise
* return a resolveable area
* @todo move ref-id validation check to the FO class' addProperties().
*/
private InlineArea getPageNumberCitationInlineArea(LayoutManager parentLM) {
if (pncNode.getRefId().equals("")) {
fobj.getLogger().error("page-number-citation must contain \"ref-id\"");
return null;
}
PageViewport page = parentLM.resolveRefID(pncNode.getRefId());
InlineArea inline = null;
if (page != null) {
String str = page.getPageNumber();
// get page string from parent, build area
TextArea text = new TextArea();
inline = text;
int width = getStringWidth(str);
text.setTextArea(str);
inline.setIPD(width);
inline.setHeight(font.getAscender() - font.getDescender());
inline.setOffset(font.getAscender());
inline.addTrait(Trait.FONT_NAME, font.getFontName());
inline.addTrait(Trait.FONT_SIZE,
new Integer(font.getFontSize()));
pncNode.setUnresolved(false);
} else {
pncNode.setUnresolved(true);
inline = new UnresolvedPageNumber(pncNode.getRefId());
String str = "MMM"; // reserve three spaces for page number
int width = getStringWidth(str);
inline.setIPD(width);
inline.setHeight(font.getAscender() - font.getDescender());
inline.setOffset(font.getAscender());
inline.addTrait(Trait.FONT_NAME, font.getFontName());
inline.addTrait(Trait.FONT_SIZE, new Integer(font.getFontSize()));
}
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;
}
}
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