Removed the DOM representation of the structure tree.

The structure tree is now directly converted into corresponding PDF objects.
When going the IF route, the structure tree is stored in the form of SAX events that will be re-played when it's time to stream them into the output. This may still change.

* Extracted RFC3066 methods from XMLUtil into new LanguageTags class that can be re-used in a non-XML context.
* Dropped support for accessibility in the old Area Tree XML.
* Added support for the xml:lang property on fo:root, so that the global language can be set for the document without retrieving the language from the first page-sequence.
* Renamed StructureTreeBuilder into more appropriate StructureTreeEventHandler (same for applicable sub-classes)
* Renamed StructureTreeBuildingFOEventHandler into FO2StructureTreeConverter and added test case
* Added test cases for classes in the StructureTreeEventHandler hierarchy


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_ImproveAccessibility@1205935 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 0 insertions, 95 deletions

diff --git a/src/java/org/apache/fop/accessibility/StructureTreeBuilder.java b/src/java/org/apache/fop/accessibility/StructureTreeBuilder.java
deleted file mode 100644
index 036502e99..000000000
--- a/src/java/org/apache/fop/accessibility/StructureTreeBuilder.java
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * 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.accessibility;
-
-import javax.xml.transform.TransformerConfigurationException;
-import javax.xml.transform.dom.DOMResult;
-import javax.xml.transform.sax.SAXTransformerFactory;
-import javax.xml.transform.sax.TransformerHandler;
-
-import org.xml.sax.ContentHandler;
-import org.xml.sax.SAXException;
-
-import org.apache.fop.util.DelegatingContentHandler;
-
-/**
- * Helper class that re-builds a structure tree from what is stored in an
- * intermediate XML file (IF XML or Area Tree XML).
- */
-public final class StructureTreeBuilder {
-
-    private final SAXTransformerFactory factory;
-
-    private final StructureTree structureTree = new StructureTree();
-
-    /**
-     * Creates a new instance.
-     *
-     * @param factory a factory internally used to build the structures of page
-     * sequences
-     */
-    public StructureTreeBuilder(SAXTransformerFactory factory) {
-        this.factory = factory;
-    }
-
-    /**
-     * Returns the structure tree that will result from the parsing.
-     *
-     * @return the structure tree built by this object
-     */
-    public StructureTree getStructureTree() {
-        return structureTree;
-    }
-
-    /**
-     * Returns a ContenHandler for parsing the structure of a new page sequence.
-     * It is assumed that page sequences are being parsed in the document order.
-     *
-     * @return a handler for parsing the <structure-tree> or
-     * <structureTree> element and its descendants
-     * @throws SAXException if there is an error when creating the handler
-     */
-    public ContentHandler getHandlerForNextPageSequence() throws SAXException {
-        TransformerHandler structureTreeBuilder;
-        try {
-            structureTreeBuilder = factory.newTransformerHandler();
-        } catch (TransformerConfigurationException e) {
-            throw new SAXException(e);
-        }
-        final DOMResult domResult = new DOMResult();
-        structureTreeBuilder.setResult(domResult);
-        return new DelegatingContentHandler(structureTreeBuilder) {
-
-            public void characters(char[] ch, int start, int length) throws SAXException {
-                /*
-                 * There's no text node in the structure tree. This is just
-                 * whitespace => ignore
-                 */
-            }
-
-            public void endDocument() throws SAXException {
-                super.endDocument();
-                structureTree.addPageSequenceStructure(domResult.getNode().getFirstChild()
-                        .getChildNodes());
-            }
-        };
-    }
-
-}