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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.area;
import java.awt.Color;
import java.awt.geom.Rectangle2D;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import java.util.StringTokenizer;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.area.Trait.Background;
import org.apache.fop.area.inline.AbstractTextArea;
import org.apache.fop.area.inline.Character;
import org.apache.fop.area.inline.ForeignObject;
import org.apache.fop.area.inline.Image;
import org.apache.fop.area.inline.InlineBlockParent;
import org.apache.fop.area.inline.InlineParent;
import org.apache.fop.area.inline.Leader;
import org.apache.fop.area.inline.Space;
import org.apache.fop.area.inline.SpaceArea;
import org.apache.fop.area.inline.TextArea;
import org.apache.fop.area.inline.Viewport;
import org.apache.fop.area.inline.WordArea;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.ElementMappingRegistry;
import org.apache.fop.fo.expr.PropertyException;
import org.apache.fop.fo.extensions.ExtensionAttachment;
import org.apache.fop.fonts.Font;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.image.FopImage;
import org.apache.fop.image.ImageFactory;
import org.apache.fop.traits.BorderProps;
import org.apache.fop.util.ColorUtil;
import org.apache.fop.util.ContentHandlerFactory;
import org.apache.fop.util.ContentHandlerFactoryRegistry;
import org.apache.fop.util.DefaultErrorListener;
import org.apache.fop.util.QName;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* This is a parser for the area tree XML (intermediate format) which is used to reread an area
* tree (or part of it) into memory again for rendering to the final output format.
*/
public class AreaTreeParser {
/** Logger instance */
protected static Log log = LogFactory.getLog(AreaTreeParser.class);
private static SAXTransformerFactory tFactory
= (SAXTransformerFactory)SAXTransformerFactory.newInstance();
/**
* Parses an intermediate file (area tree XML) into an AreaTreeModel instance by adding
* pages to it.
* @param src the Source instance pointing to the intermediate file
* @param treeModel the AreaTreeModel that the parsed pages are added to
* @param userAgent the user agent
* @throws TransformerException if an error occurs while parsing the area tree XML
*/
public void parse(Source src, AreaTreeModel treeModel, FOUserAgent userAgent)
throws TransformerException {
Transformer transformer = tFactory.newTransformer();
transformer.setErrorListener(new DefaultErrorListener(log));
SAXResult res = new SAXResult(getContentHandler(treeModel, userAgent));
transformer.transform(src, res);
}
/**
* Creates a new ContentHandler instance that you can send the area tree XML to. The parsed
* pages are added to the AreaTreeModel instance you pass in as a parameter.
* @param treeModel the AreaTreeModel that the parsed pages are added to
* @param userAgent the user agent
* @return the ContentHandler instance to receive the SAX stream from the area tree XML
*/
public ContentHandler getContentHandler(AreaTreeModel treeModel, FOUserAgent userAgent) {
ElementMappingRegistry elementMappingRegistry
= userAgent.getFactory().getElementMappingRegistry();
return new Handler(treeModel, userAgent, elementMappingRegistry);
}
private static class Handler extends DefaultHandler {
private Map makers = new java.util.HashMap();
private AreaTreeModel treeModel;
private FOUserAgent userAgent;
private ElementMappingRegistry elementMappingRegistry;
private Attributes lastAttributes;
private StringBuffer content = new StringBuffer();
private PageViewport currentPageViewport;
private Stack areaStack = new Stack();
private boolean firstFlow;
private boolean pendingStartPageSequence;
private Stack delegateStack = new Stack();
private ContentHandler delegate;
private DOMImplementation domImplementation;
public Handler(AreaTreeModel treeModel, FOUserAgent userAgent,
ElementMappingRegistry elementMappingRegistry) {
this.treeModel = treeModel;
this.userAgent = userAgent;
this.elementMappingRegistry = elementMappingRegistry;
makers.put("areaTree", new AreaTreeMaker());
makers.put("page", new PageMaker());
makers.put("pageSequence", new PageSequenceMaker());
makers.put("title", new TitleMaker());
makers.put("pageViewport", new PageViewportMaker());
makers.put("regionViewport", new RegionViewportMaker());
makers.put("regionBefore", new RegionBeforeMaker());
makers.put("regionAfter", new RegionAfterMaker());
makers.put("regionStart", new RegionStartMaker());
makers.put("regionEnd", new RegionEndMaker());
makers.put("regionBody", new RegionBodyMaker());
makers.put("flow", new FlowMaker());
makers.put("mainReference", new MainReferenceMaker());
makers.put("span", new SpanMaker());
makers.put("footnote", new FootnoteMaker());
makers.put("beforeFloat", new BeforeFloatMaker());
makers.put("block", new BlockMaker());
makers.put("lineArea", new LineAreaMaker());
makers.put("inlineparent", new InlineParentMaker());
makers.put("inlineblockparent", new InlineBlockParentMaker());
makers.put("text", new TextMaker());
makers.put("word", new WordMaker());
makers.put("space", new SpaceMaker());
makers.put("char", new CharMaker());
makers.put("leader", new LeaderMaker());
makers.put("viewport", new ViewportMaker());
makers.put("image", new ImageMaker());
makers.put("foreignObject", new ForeignObjectMaker());
}
private static Rectangle2D parseRect(String rect) {
StringTokenizer tokenizer = new StringTokenizer(rect, " ");
return new Rectangle2D.Double(
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()));
}
private Area findAreaType(Class clazz) {
if (areaStack.size() > 0) {
int pos = areaStack.size() - 1;
Object obj = null;
while (pos >= 0 && !(clazz.isInstance(obj = areaStack.get(pos)))) {
pos--;
}
if (pos >= 0) {
return (Area)obj;
}
}
return null;
}
private RegionViewport getCurrentRegionViewport() {
return (RegionViewport)findAreaType(RegionViewport.class);
}
private BodyRegion getCurrentBodyRegion() {
return (BodyRegion)findAreaType(BodyRegion.class);
}
private BlockParent getCurrentBlockParent() {
return (BlockParent)findAreaType(BlockParent.class);
}
private AbstractTextArea getCurrentText() {
return (AbstractTextArea)findAreaType(AbstractTextArea.class);
}
private Viewport getCurrentViewport() {
return (Viewport)findAreaType(Viewport.class);
}
/** @see org.xml.sax.helpers.DefaultHandler */
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
if (delegate != null) {
delegateStack.push(qName);
delegate.startElement(uri, localName, qName, attributes);
} else if (domImplementation != null) {
//domImplementation is set so we need to start a new DOM building sub-process
TransformerHandler handler;
try {
handler = tFactory.newTransformerHandler();
} catch (TransformerConfigurationException e) {
throw new SAXException("Error creating a new TransformerHandler", e);
}
Document doc = domImplementation.createDocument(uri, qName, null);
//It's easier to work with an empty document, so remove the root element
doc.removeChild(doc.getDocumentElement());
handler.setResult(new DOMResult(doc));
Area parent = (Area)areaStack.peek();
((ForeignObject)parent).setDocument(doc);
//activate delegate for nested foreign document
domImplementation = null; //Not needed anymore now
this.delegate = handler;
delegateStack.push(qName);
delegate.startDocument();
delegate.startElement(uri, localName, qName, attributes);
} else {
lastAttributes = attributes;
boolean handled = true;
if ("".equals(uri)) {
Maker maker = (Maker)makers.get(localName);
if (maker != null) {
maker.startElement(attributes);
} else if ("extension-attachments".equals(localName)) {
//TODO implement me
} else {
handled = false;
}
} else {
ContentHandlerFactoryRegistry registry
= userAgent.getFactory().getContentHandlerFactoryRegistry();
ContentHandlerFactory factory = registry.getFactory(uri);
if (factory != null) {
delegate = factory.createContentHandler();
delegateStack.push(qName);
delegate.startDocument();
delegate.startElement(uri, localName, qName, attributes);
} else {
handled = false;
}
}
if (!handled) {
if (uri == null || uri.length() == 0) {
throw new SAXException("Unhandled element " + localName
+ " in namespace: " + uri);
} else {
log.warn("Unhandled element " + localName
+ " in namespace: " + uri);
}
}
}
}
/** @see org.xml.sax.helpers.DefaultHandler */
public void endElement(String uri, String localName, String qName) throws SAXException {
if (delegate != null) {
delegate.endElement(uri, localName, qName);
delegateStack.pop();
if (delegateStack.size() == 0) {
delegate.endDocument();
if (delegate instanceof ContentHandlerFactory.ObjectSource) {
Object obj = ((ContentHandlerFactory.ObjectSource)delegate).getObject();
handleExternallyGeneratedObject(obj);
}
delegate = null; //Sub-document is processed, return to normal processing
}
} else {
if ("".equals(uri)) {
Maker maker = (Maker)makers.get(localName);
if (maker != null) {
maker.endElement();
}
} else {
//log.debug("Ignoring " + localName + " in namespace: " + uri);
}
content.setLength(0); //Reset text buffer (see characters())
}
}
// ============== Maker classes for the area tree objects =============
private static interface Maker {
void startElement(Attributes attributes) throws SAXException;
void endElement();
}
private abstract class AbstractMaker implements Maker {
public void startElement(Attributes attributes) throws SAXException {
//nop
}
public void endElement() {
//nop
}
}
private class AreaTreeMaker extends AbstractMaker {
//no overrides
}
private class PageSequenceMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
pendingStartPageSequence = true;
//treeModel.startPageSequence(null); Done after title or on the first viewport
}
}
private class TitleMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
LineArea line = new LineArea();
transferForeignObjects(attributes, line);
areaStack.push(line);
}
public void endElement() {
LineArea line = (LineArea)areaStack.pop();
treeModel.startPageSequence(line);
pendingStartPageSequence = false;
}
}
private class PageViewportMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
if (pendingStartPageSequence) {
treeModel.startPageSequence(null);
pendingStartPageSequence = false;
}
if (currentPageViewport != null) {
throw new IllegalStateException("currentPageViewport must be null");
}
Rectangle2D viewArea = parseRect(attributes.getValue("bounds"));
int pageNumber = getAttributeAsInteger(attributes, "nr", -1);
String key = attributes.getValue("key");
String pageNumberString = attributes.getValue("formatted-nr");
String pageMaster = attributes.getValue("simple-page-master-name");
boolean blank = getAttributeAsBoolean(attributes, "blank", false);
currentPageViewport = new PageViewport(viewArea,
pageNumber, pageNumberString,
pageMaster, blank);
transferForeignObjects(attributes, currentPageViewport);
currentPageViewport.setKey(key);
}
}
private class PageMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
Page p = new Page();
currentPageViewport.setPage(p);
}
public void endElement() {
treeModel.addPage(currentPageViewport);
currentPageViewport = null;
}
}
private class RegionViewportMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
RegionViewport rv = getCurrentRegionViewport();
if (rv != null) {
throw new IllegalStateException("Current RegionViewport must be null");
}
Rectangle2D viewArea = parseRect(attributes.getValue("rect"));
rv = new RegionViewport(viewArea);
transferForeignObjects(attributes, rv);
rv.setClip(getAttributeAsBoolean(attributes, "clipped", false));
setAreaAttributes(attributes, rv);
setTraits(attributes, rv, SUBSET_COMMON);
setTraits(attributes, rv, SUBSET_BOX);
setTraits(attributes, rv, SUBSET_COLOR);
areaStack.push(rv);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), RegionViewport.class);
}
}
private class RegionBeforeMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
pushNewRegionReference(attributes, Constants.FO_REGION_BEFORE);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), RegionReference.class);
}
}
private class RegionAfterMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
pushNewRegionReference(attributes, Constants.FO_REGION_AFTER);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), RegionReference.class);
}
}
private class RegionStartMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
pushNewRegionReference(attributes, Constants.FO_REGION_START);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), RegionReference.class);
}
}
private class RegionEndMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
pushNewRegionReference(attributes, Constants.FO_REGION_END);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), RegionReference.class);
}
}
private class RegionBodyMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
BodyRegion body = getCurrentBodyRegion();
if (body != null) {
throw new IllegalStateException("Current BodyRegion must be null");
}
String regionName = attributes.getValue("name");
int columnCount = getAttributeAsInteger(attributes, "columnCount", 1);
int columnGap = getAttributeAsInteger(attributes, "columnGap", 0);
RegionViewport rv = getCurrentRegionViewport();
body = new BodyRegion(Constants.FO_REGION_BODY,
regionName, rv, columnCount, columnGap);
transferForeignObjects(attributes, body);
body.setCTM(getAttributeAsCTM(attributes, "ctm"));
setAreaAttributes(attributes, body);
rv.setRegionReference(body);
currentPageViewport.getPage().setRegionViewport(
Constants.FO_REGION_BODY, rv);
areaStack.push(body);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), BodyRegion.class);
}
}
private class FlowMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
BodyRegion body = getCurrentBodyRegion();
if (!firstFlow) {
body.getMainReference().getCurrentSpan().moveToNextFlow();
} else {
firstFlow = false;
}
NormalFlow flow = body.getMainReference().getCurrentSpan().getCurrentFlow();
transferForeignObjects(attributes, flow);
setAreaAttributes(attributes, flow);
areaStack.push(flow);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), NormalFlow.class);
}
}
private class MainReferenceMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
//mainReference is created by the BodyRegion
MainReference mr = getCurrentBodyRegion().getMainReference();
transferForeignObjects(attributes, mr);
setAreaAttributes(attributes, mr);
}
}
private class SpanMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
int ipd = getAttributeAsInteger(attributes, "ipd", 0);
int columnCount = getAttributeAsInteger(attributes, "columnCount", 1);
BodyRegion body = getCurrentBodyRegion();
Span span = new Span(columnCount,
body.getColumnGap(), ipd);
transferForeignObjects(attributes, span);
setAreaAttributes(attributes, span);
body.getMainReference().getSpans().add(span);
firstFlow = true;
}
}
private class FootnoteMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
Footnote fn = getCurrentBodyRegion().getFootnote();
transferForeignObjects(attributes, fn);
areaStack.push(fn);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), Footnote.class);
}
}
private class BeforeFloatMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
BeforeFloat bf = getCurrentBodyRegion().getBeforeFloat();
transferForeignObjects(attributes, bf);
areaStack.push(bf);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), BeforeFloat.class);
}
}
private class BlockMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
boolean isViewport = getAttributeAsBoolean(attributes,
"is-viewport-area", false);
Block block;
if (isViewport) {
BlockViewport bv = new BlockViewport();
bv.setClip(getAttributeAsBoolean(attributes, "clipped", false));
bv.setCTM(getAttributeAsCTM(attributes, "ctm"));
if (bv.getPositioning() != BlockViewport.RELATIVE) {
bv.setXOffset(
getAttributeAsInteger(attributes, "left-position", 0));
bv.setYOffset(
getAttributeAsInteger(attributes, "top-position", 0));
}
block = bv;
} else {
block = new Block();
}
String positioning = attributes.getValue("positioning");
if ("absolute".equalsIgnoreCase(positioning)) {
block.setPositioning(Block.ABSOLUTE);
} else if ("fixed".equalsIgnoreCase(positioning)) {
block.setPositioning(Block.FIXED);
} else if ("relative".equalsIgnoreCase(positioning)) {
block.setPositioning(Block.RELATIVE);
} else {
block.setPositioning(Block.STACK);
}
if (attributes.getValue("left-offset") != null) {
block.setXOffset(getAttributeAsInteger(attributes, "left-offset", 0));
}
if (attributes.getValue("top-offset") != null) {
block.setYOffset(getAttributeAsInteger(attributes, "top-offset", 0));
}
transferForeignObjects(attributes, block);
setAreaAttributes(attributes, block);
setTraits(attributes, block, SUBSET_COMMON);
setTraits(attributes, block, SUBSET_BOX);
setTraits(attributes, block, SUBSET_COLOR);
Area parent = (Area)areaStack.peek();
//BlockParent parent = getCurrentBlockParent();
parent.addChildArea(block);
areaStack.push(block);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), Block.class);
}
}
private class LineAreaMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
LineArea line = new LineArea();
setAreaAttributes(attributes, line);
setTraits(attributes, line, SUBSET_COMMON);
setTraits(attributes, line, SUBSET_BOX);
setTraits(attributes, line, SUBSET_COLOR);
BlockParent parent = getCurrentBlockParent();
parent.addChildArea(line);
areaStack.push(line);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), LineArea.class);
}
}
private class InlineParentMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
InlineParent ip = new InlineParent();
transferForeignObjects(attributes, ip);
ip.setOffset(getAttributeAsInteger(attributes, "offset", 0));
setAreaAttributes(attributes, ip);
setTraits(attributes, ip, SUBSET_COMMON);
setTraits(attributes, ip, SUBSET_BOX);
setTraits(attributes, ip, SUBSET_COLOR);
setTraits(attributes, ip, SUBSET_LINK);
Area parent = (Area)areaStack.peek();
parent.addChildArea(ip);
areaStack.push(ip);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), InlineParent.class);
}
}
private class InlineBlockParentMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
InlineBlockParent ibp = new InlineBlockParent();
transferForeignObjects(attributes, ibp);
ibp.setOffset(getAttributeAsInteger(attributes, "offset", 0));
setAreaAttributes(attributes, ibp);
setTraits(attributes, ibp, SUBSET_COMMON);
setTraits(attributes, ibp, SUBSET_BOX);
setTraits(attributes, ibp, SUBSET_COLOR);
Area parent = (Area)areaStack.peek();
parent.addChildArea(ibp);
areaStack.push(ibp);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), InlineBlockParent.class);
}
}
private class TextMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
if (getCurrentText() != null) {
throw new IllegalStateException("Current Text must be null");
}
TextArea text = new TextArea();
setAreaAttributes(attributes, text);
setTraits(attributes, text, SUBSET_COMMON);
setTraits(attributes, text, SUBSET_BOX);
setTraits(attributes, text, SUBSET_COLOR);
setTraits(attributes, text, SUBSET_FONT);
text.setBaselineOffset(getAttributeAsInteger(attributes, "baseline", 0));
text.setOffset(getAttributeAsInteger(attributes, "offset", 0));
text.setTextLetterSpaceAdjust(getAttributeAsInteger(attributes,
"tlsadjust", 0));
text.setTextWordSpaceAdjust(getAttributeAsInteger(attributes,
"twsadjust", 0));
Area parent = (Area)areaStack.peek();
parent.addChildArea(text);
areaStack.push(text);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), TextArea.class);
}
}
private class WordMaker extends AbstractMaker {
private int[] toIntArray(String s) {
if (s == null || s.length() == 0) {
return null;
}
StringTokenizer tokenizer = new StringTokenizer(s, " ");
List values = new java.util.ArrayList();
while (tokenizer.hasMoreTokens()) {
values.add(new Integer(tokenizer.nextToken()));
}
int[] res = new int[values.size()];
for (int i = 0, c = res.length; i < c; i++) {
res[i] = ((Integer)values.get(i)).intValue();
}
return res;
}
public void endElement() {
int offset = getAttributeAsInteger(lastAttributes, "offset", 0);
int[] letterAdjust = toIntArray(lastAttributes.getValue("letter-adjust"));
String txt = content.toString();
WordArea word = new WordArea(txt, offset, letterAdjust);
AbstractTextArea text = getCurrentText();
word.setParentArea(text);
text.addChildArea(word);
}
}
private class SpaceMaker extends AbstractMaker {
public void endElement() {
int offset = getAttributeAsInteger(lastAttributes, "offset", 0);
String txt = content.toString();
//TODO the isAdjustable parameter is currently not used/implemented
if (txt.length() > 0) {
boolean adjustable = getAttributeAsBoolean(lastAttributes, "adj", true);
SpaceArea space = new SpaceArea(txt.charAt(0), offset, adjustable);
AbstractTextArea text = getCurrentText();
space.setParentArea(text);
text.addChildArea(space);
} else {
Space space = new Space();
setAreaAttributes(lastAttributes, space);
setTraits(lastAttributes, space, SUBSET_COMMON);
setTraits(lastAttributes, space, SUBSET_BOX);
setTraits(lastAttributes, space, SUBSET_COLOR);
space.setOffset(offset);
Area parent = (Area)areaStack.peek();
parent.addChildArea(space);
}
}
}
private class CharMaker extends AbstractMaker {
public void endElement() {
String txt = content.toString();
Character ch = new Character(txt.charAt(0));
transferForeignObjects(lastAttributes, ch);
setAreaAttributes(lastAttributes, ch);
setTraits(lastAttributes, ch, SUBSET_COMMON);
setTraits(lastAttributes, ch, SUBSET_BOX);
setTraits(lastAttributes, ch, SUBSET_COLOR);
setTraits(lastAttributes, ch, SUBSET_FONT);
ch.setOffset(getAttributeAsInteger(lastAttributes, "offset", 0));
ch.setBaselineOffset(getAttributeAsInteger(lastAttributes, "baseline", 0));
Area parent = (Area)areaStack.peek();
parent.addChildArea(ch);
}
}
private class LeaderMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
Leader leader = new Leader();
transferForeignObjects(attributes, leader);
setAreaAttributes(attributes, leader);
setTraits(attributes, leader, SUBSET_COMMON);
setTraits(attributes, leader, SUBSET_BOX);
setTraits(attributes, leader, SUBSET_COLOR);
setTraits(attributes, leader, SUBSET_FONT);
leader.setOffset(getAttributeAsInteger(attributes, "offset", 0));
String ruleStyle = attributes.getValue("ruleStyle");
if (ruleStyle != null) {
leader.setRuleStyle(ruleStyle);
}
leader.setRuleThickness(
getAttributeAsInteger(attributes, "ruleThickness", 0));
Area parent = (Area)areaStack.peek();
parent.addChildArea(leader);
}
public void endElement() {
}
}
private class ViewportMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
Viewport viewport = new Viewport(null);
transferForeignObjects(attributes, viewport);
setAreaAttributes(attributes, viewport);
setTraits(attributes, viewport, SUBSET_COMMON);
setTraits(attributes, viewport, SUBSET_BOX);
setTraits(attributes, viewport, SUBSET_COLOR);
viewport.setContentPosition(getAttributeAsRectangle2D(attributes, "pos"));
viewport.setClip(getAttributeAsBoolean(attributes, "clip", false));
viewport.setOffset(getAttributeAsInteger(attributes, "offset", 0));
Area parent = (Area)areaStack.peek();
parent.addChildArea(viewport);
areaStack.push(viewport);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), Viewport.class);
}
}
private class ImageMaker extends AbstractMaker {
public void startElement(Attributes attributes) {
String url = attributes.getValue("url");
Image image = new Image(url);
transferForeignObjects(attributes, image);
setAreaAttributes(attributes, image);
setTraits(attributes, image, SUBSET_COMMON);
getCurrentViewport().setContent(image);
}
}
private class ForeignObjectMaker extends AbstractMaker {
public void startElement(Attributes attributes) throws SAXException {
String ns = attributes.getValue("ns");
domImplementation
= elementMappingRegistry.getDOMImplementationForNamespace(ns);
if (domImplementation == null) {
throw new SAXException("No DOMImplementation could be"
+ " identified to handle namespace: " + ns);
}
ForeignObject foreign = new ForeignObject(ns);
transferForeignObjects(attributes, foreign);
setAreaAttributes(attributes, foreign);
setTraits(attributes, foreign, SUBSET_COMMON);
getCurrentViewport().setContent(foreign);
areaStack.push(foreign);
}
public void endElement() {
assertObjectOfClass(areaStack.pop(), ForeignObject.class);
}
}
// ====================================================================
private void pushNewRegionReference(Attributes attributes, int side) {
String regionName = attributes.getValue("name");
RegionViewport rv = getCurrentRegionViewport();
RegionReference reg = new RegionReference(side,
regionName, rv);
transferForeignObjects(attributes, reg);
reg.setCTM(getAttributeAsCTM(attributes, "ctm"));
setAreaAttributes(attributes, reg);
rv.setRegionReference(reg);
currentPageViewport.getPage().setRegionViewport(
side, rv);
areaStack.push(reg);
}
private void assertObjectOfClass(Object obj, Class clazz) {
if (!clazz.isInstance(obj)) {
throw new IllegalStateException("Object is not an instance of "
+ clazz.getName() + " but of " + obj.getClass().getName());
}
}
/**
* Handles objects created by "sub-parsers" that implement the ObjectSource interface.
* An example of object handled here are ExtensionAttachments.
* @param obj the Object to be handled.
*/
protected void handleExternallyGeneratedObject(Object obj) {
if (areaStack.size() == 0 && obj instanceof ExtensionAttachment) {
ExtensionAttachment attachment = (ExtensionAttachment)obj;
if (this.currentPageViewport == null) {
this.treeModel.handleOffDocumentItem(
new OffDocumentExtensionAttachment(attachment));
} else {
this.currentPageViewport.addExtensionAttachment(attachment);
}
} else {
log.warn("Don't know how to handle externally generated object: " + obj);
}
}
private void setAreaAttributes(Attributes attributes, Area area) {
area.setIPD(Integer.parseInt(attributes.getValue("ipd")));
area.setBPD(Integer.parseInt(attributes.getValue("bpd")));
}
private static final Object[] SUBSET_COMMON = new Object[] {
Trait.PROD_ID};
private static final Object[] SUBSET_LINK = new Object[] {
Trait.INTERNAL_LINK, Trait.EXTERNAL_LINK};
private static final Object[] SUBSET_COLOR = new Object[] {
Trait.BACKGROUND, Trait.COLOR};
private static final Object[] SUBSET_FONT = new Object[] {
Trait.FONT, Trait.FONT_SIZE, Trait.BLINK,
Trait.OVERLINE, Trait.OVERLINE_COLOR,
Trait.LINETHROUGH, Trait.LINETHROUGH_COLOR,
Trait.UNDERLINE, Trait.UNDERLINE_COLOR};
private static final Object[] SUBSET_BOX = new Object[] {
Trait.BORDER_BEFORE, Trait.BORDER_AFTER, Trait.BORDER_START, Trait.BORDER_END,
Trait.SPACE_BEFORE, Trait.SPACE_AFTER, Trait.SPACE_START, Trait.SPACE_END,
Trait.PADDING_BEFORE, Trait.PADDING_AFTER, Trait.PADDING_START, Trait.PADDING_END,
Trait.START_INDENT, Trait.END_INDENT,
Trait.IS_REFERENCE_AREA, Trait.IS_VIEWPORT_AREA};
private void setTraits(Attributes attributes, Area area, Object[] traitSubset) {
for (int i = 0, c = traitSubset.length; i < c; i++) {
Object trait = traitSubset[i];
String traitName = Trait.getTraitName(trait);
String value = attributes.getValue(traitName);
if (value != null) {
Class cl = Trait.getTraitClass(trait);
if (cl == Integer.class) {
area.addTrait(trait, new Integer(value));
} else if (cl == Boolean.class) {
area.addTrait(trait, Boolean.valueOf(value));
} else if (cl == String.class) {
area.addTrait(trait, value);
} else if (cl == Color.class) {
try {
area.addTrait(trait, ColorUtil.parseColorString(value));
} catch (PropertyException e) {
throw new IllegalArgumentException(e.getMessage());
}
} else if (cl == Background.class) {
Background bkg = new Background();
try {
Color col = ColorUtil
.parseColorString(attributes
.getValue("bkg-color"));
bkg.setColor(col);
} catch (PropertyException e) {
throw new IllegalArgumentException(e.getMessage());
}
String url = attributes.getValue("bkg-img");
if (url != null) {
bkg.setURL(url);
ImageFactory fact = userAgent.getFactory().getImageFactory();
FopImage img = fact.getImage(url, userAgent);
if (img == null) {
log.error("Background image not available: " + url);
} else {
// load dimensions
if (!img.load(FopImage.DIMENSIONS)) {
log.error("Cannot read background image dimensions: "
+ url);
}
}
bkg.setFopImage(img);
String repeat = attributes.getValue("bkg-repeat");
if (repeat != null) {
bkg.setRepeat(repeat);
}
bkg.setHoriz(getAttributeAsInteger(attributes,
"bkg-horz-offset", 0));
bkg.setVertical(getAttributeAsInteger(attributes,
"bkg-vert-offset", 0));
}
area.addTrait(trait, bkg);
} else if (cl == BorderProps.class) {
area.addTrait(trait, BorderProps.valueOf(value));
}
} else {
if (trait == Trait.FONT) {
String fontName = attributes.getValue("font-name");
if (fontName != null) {
String fontStyle = attributes.getValue("font-style");
int fontWeight = getAttributeAsInteger(
attributes, "font-weight", Font.NORMAL);
area.addTrait(trait,
FontInfo.createFontKey(fontName, fontStyle, fontWeight));
}
}
}
}
}
private boolean getAttributeAsBoolean(Attributes attributes, String name,
boolean defaultValue) {
String s = attributes.getValue(name);
if (s == null) {
return defaultValue;
} else {
return Boolean.valueOf(s).booleanValue();
}
}
private int getAttributeAsInteger(Attributes attributes, String name,
int defaultValue) {
String s = attributes.getValue(name);
if (s == null) {
return defaultValue;
} else {
return Integer.parseInt(s);
}
}
private CTM getAttributeAsCTM(Attributes attributes, String name) {
String s = attributes.getValue(name).trim();
if (s.startsWith("[") && s.endsWith("]")) {
s = s.substring(1, s.length() - 1);
StringTokenizer tokenizer = new StringTokenizer(s, " ");
double[] values = new double[] {
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken())};
return new CTM(values[0], values[1], values[2], values[3], values[4], values[5]);
} else {
throw new IllegalArgumentException("CTM must be surrounded by square brackets");
}
}
private Rectangle2D getAttributeAsRectangle2D(Attributes attributes, String name) {
String s = attributes.getValue(name).trim();
StringTokenizer tokenizer = new StringTokenizer(s, " ");
double[] values = new double[] {
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken()),
Double.parseDouble(tokenizer.nextToken())};
return new Rectangle2D.Double(values[0], values[1], values[2], values[3]);
}
private void transferForeignObjects(Attributes atts, AreaTreeObject ato) {
for (int i = 0, c = atts.getLength(); i < c; i++) {
String ns = atts.getURI(i);
if (ns.length() > 0) {
if ("http://www.w3.org/2000/xmlns/".equals(ns)) {
continue;
}
QName qname = new QName(ns, atts.getQName(i));
ato.setForeignAttribute(qname, atts.getValue(i));
}
}
}
/** @see org.xml.sax.ContentHandler#characters(char[], int, int) */
public void characters(char[] ch, int start, int length) throws SAXException {
if (delegate != null) {
delegate.characters(ch, start, length);
} else {
content.append(ch, start, length);
}
}
}
}
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