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- /*-- $Id$ --
-
- ============================================================================
- The Apache Software License, Version 1.1
- ============================================================================
-
- Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without modifica-
- tion, are permitted provided that the following conditions are met:
-
- 1. Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
-
- 3. The end-user documentation included with the redistribution, if any, must
- include the following acknowledgment: "This product includes software
- developed by the Apache Software Foundation (http://www.apache.org/)."
- Alternately, this acknowledgment may appear in the software itself, if
- and wherever such third-party acknowledgments normally appear.
-
- 4. The names "Fop" and "Apache Software Foundation" must not be used to
- endorse or promote products derived from this software without prior
- written permission. For written permission, please contact
- apache@apache.org.
-
- 5. Products derived from this software may not be called "Apache", nor may
- "Apache" appear in their name, without prior written permission of the
- Apache Software Foundation.
-
- THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- This software consists of voluntary contributions made by many individuals
- on behalf of the Apache Software Foundation and was originally created by
- James Tauber <jtauber@jtauber.com>. For more information on the Apache
- Software Foundation, please see <http://www.apache.org/>.
-
- */
- package org.apache.fop.fo;
-
- // FOP
- import org.apache.fop.layout.AreaTree;
- import org.apache.fop.messaging.MessageHandler;
- import org.apache.fop.apps.FOPException;
- import org.apache.fop.fo.pagination.Root;
-
- // SAX
- import org.xml.sax.helpers.DefaultHandler;
- import org.xml.sax.SAXException;
- import org.xml.sax.InputSource;
- import org.xml.sax.Attributes;
-
- // Java
- import java.util.Hashtable;
- import java.util.Stack;
- import java.io.IOException;
-
- /**
- * SAX Handler that builds the formatting object tree.
- */
- public class FOTreeBuilder extends DefaultHandler {
-
- /**
- * table mapping element names to the makers of objects
- * representing formatting objects
- */
- protected Hashtable fobjTable = new Hashtable();
-
- /**
- * class that builds a property list for each formatting object
- */
- protected Hashtable propertylistTable = new Hashtable();
-
- /**
- * current formatting object being handled
- */
- protected FObj currentFObj = null;
-
- /**
- * the root of the formatting object tree
- */
- protected FObj rootFObj = null;
-
- /**
- * set of names of formatting objects encountered but unknown
- */
- protected Hashtable unknownFOs = new Hashtable();
-
- // namespace implementation ideas pinched from John Cowan
- // protected static class NSMap {
- // String prefix;
- // String uri;
- // int level;
-
- // NSMap(String prefix, String uri, int level) {
- // this.prefix = prefix;
- // this.uri = uri;
- // this.level = level;
- // }
- // }
-
- // protected int level = 0;
- // protected Stack namespaceStack = new Stack();
-
- // {
- // namespaceStack.push(new NSMap("xml",
- // "http://www.w3.org/XML/1998/namespace",
- // -1));
- // namespaceStack.push(new NSMap("", "", -1));
- // }
-
- // protected String findURI(String prefix) {
- // for (int i = namespaceStack.size() - 1; i >= 0; i--) {
- // NSMap nsMap = (NSMap) (namespaceStack.elementAt(i));
- // if (prefix.equals(nsMap.prefix)) return nsMap.uri;
- // }
- // return null;
- // }
-
- // protected String mapName(String name)
- // throws SAXException {
- // int colon = name.indexOf(':');
- // String prefix = "";
- // String localPart = name;
- // if (colon != -1) {
- // prefix = name.substring(0, colon);
- // localPart = name.substring(colon + 1);
- // }
- // String uri = findURI(prefix);
- // if (uri == null) {
- // if (prefix.equals("")) {
- // return name;
- // } else {
- // throw new SAXException(new FOPException("Unknown namespace prefix " + prefix));
- // }
- // }
- // return uri + "^" + localPart;
- // }
-
- /**
- * add a mapping from element name to maker.
- *
- * @param namespaceURI namespace URI of formatting object element
- * @param localName local name of formatting object element
- * @param maker Maker for class representing formatting object
- */
- public void addMapping(String namespaceURI, String localName,
- FObj.Maker maker) {
- this.fobjTable.put(namespaceURI + "^" + localName, maker);
- }
-
- /**
- * add a mapping from element name to maker.
- *
- * @param namespaceURI namespace URI of formatting object element
- * @param localName local name of formatting object element
- * @param maker Maker for class representing formatting object
- */
- public void addPropertyList(String namespaceURI, Hashtable list) {
- PropertyListBuilder plb;
- plb = (PropertyListBuilder)this.propertylistTable.get(namespaceURI);
- if(plb == null) {
- plb = new PropertyListBuilder();
- plb.addList(list);
- this.propertylistTable.put(namespaceURI, plb);
- } else {
- plb.addList(list);
- }
- }
-
- /**
- * add a mapping from element name to maker.
- *
- * @param namespaceURI namespace URI of formatting object element
- * @param localName local name of formatting object element
- * @param maker Maker for class representing formatting object
- */
- public void addElementPropertyList(String namespaceURI, String localName, Hashtable list) {
- PropertyListBuilder plb;
- plb = (PropertyListBuilder)this.propertylistTable.get(namespaceURI);
- if(plb == null) {
- plb = new PropertyListBuilder();
- plb.addElementList(localName, list);
- this.propertylistTable.put(namespaceURI, plb);
- } else {
- plb.addElementList(localName, list);
- }
- }
-
- /** SAX Handler for characters */
- public void characters(char data[], int start, int length) {
- currentFObj.addCharacters(data, start, start + length);
- }
-
- /** SAX Handler for the end of an element */
- public void endElement(
- String uri, String localName, String rawName) {
- currentFObj.end();
- currentFObj = (FObj) currentFObj.getParent();
- // level--;
- // while (((NSMap) namespaceStack.peek()).level > level) {
- // namespaceStack.pop();
- // }
- }
-
- /** SAX Handler for the start of the document */
- public void startDocument() {
- MessageHandler.logln("building formatting object tree");
- }
-
- /** SAX Handler for the start of an element */
- public void startElement(String uri,
- String localName, String rawName, Attributes attlist)
- throws SAXException {
- /* the formatting object started */
- FObj fobj;
-
- /* the maker for the formatting object started */
- FObj.Maker fobjMaker;
-
- // level++;
- // int length = attlist.getLength();
- // for (int i = 0; i < length; i++) {
- // String att = attlist.getQName(i);
- // if (att.equals("xmlns")) {
- // namespaceStack.push( new NSMap("",
- // attlist.getValue(i),
- // level));
- // } else if (att.startsWith("xmlns:")) {
- // String value = attlist.getValue(i);
- // namespaceStack.push(new NSMap(att.substring(6), value,
- // level));
- // }
- // }
-
- //String fullName = mapName(rawName);
- String fullName = uri + "^" + localName;
- fobjMaker = (FObj.Maker) fobjTable.get(fullName);
- PropertyListBuilder currentListBuilder =
- (PropertyListBuilder)this.propertylistTable.get(uri);
-
- if (fobjMaker == null) {
- if (!this.unknownFOs.containsKey(fullName)) {
- this.unknownFOs.put(fullName, "");
- MessageHandler.errorln("WARNING: Unknown formatting object "
- + fullName);
- }
- fobjMaker = new FObjMixed.Maker(); // fall back
- }
-
- try {
- PropertyList list = null;
- if(currentListBuilder != null) {
- list = currentListBuilder.makeList(fullName, attlist,
- (currentFObj == null) ? null : currentFObj.properties);
- }
- fobj = fobjMaker.make(currentFObj, list);
- } catch (FOPException e) {
- throw new SAXException(e);
- }
-
- if (rootFObj == null) {
- rootFObj = fobj;
- if (!fobj.getName().equals("fo:root")) {
- throw new SAXException(new FOPException("Root element must"
- + " be root, not "
- + fobj.getName()));
- }
- } else {
- currentFObj.addChild(fobj);
- }
-
- currentFObj = fobj;
- }
-
- /**
- * format this formatting object tree
- *
- * @param areaTree the area tree to format into
- */
- public void format(AreaTree areaTree)
- throws FOPException {
- MessageHandler.logln("formatting FOs into areas");
- ((Root) this.rootFObj).format(areaTree);
- }
- }
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