/*
* 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: ProcessorCharacters.java 468640 2006-10-28 06:53:53Z minchau $
*/
package org.apache.xalan.processor;
import javax.xml.transform.TransformerException;
import org.apache.xalan.templates.ElemTemplateElement;
import org.apache.xalan.templates.ElemText;
import org.apache.xalan.templates.ElemTextLiteral;
import org.apache.xml.utils.XMLCharacterRecognizer;
import org.w3c.dom.Node;
/**
* This class processes character events for a XSLT template element.
* @see <a href="http://www.w3.org/TR/xslt#dtd">XSLT DTD</a>
* @see <a href="http://www.w3.org/TR/xslt#section-Creating-the-Result-Tree">section-Creating-the-Result-Tree in XSLT Specification</a>
*/
public class ProcessorCharacters extends XSLTElementProcessor
{
static final long serialVersionUID = 8632900007814162650L;
/**
* Receive notification of the start of the non-text event. This
* is sent to the current processor when any non-text event occurs.
*
* @param handler non-null reference to current StylesheetHandler that is constructing the Templates.
*/
public void startNonText(StylesheetHandler handler) throws org.xml.sax.SAXException
{
if (this == handler.getCurrentProcessor())
{
handler.popProcessor();
}
int nChars = m_accumulator.length();
if ((nChars > 0)
&& ((null != m_xslTextElement)
||!XMLCharacterRecognizer.isWhiteSpace(m_accumulator))
|| handler.isSpacePreserve())
{
ElemTextLiteral elem = new ElemTextLiteral();
elem.setDOMBackPointer(m_firstBackPointer);
elem.setLocaterInfo(handler.getLocator());
try
{
elem.setPrefixes(handler.getNamespaceSupport());
}
catch(TransformerException te)
{
throw new org.xml.sax.SAXException(te);
}
boolean doe = (null != m_xslTextElement)
? m_xslTextElement.getDisableOutputEscaping() : false;
elem.setDisableOutputEscaping(doe);
elem.setPreserveSpace(true);
char[] chars = new char[nChars];
m_accumulator.getChars(0, nChars, chars, 0);
elem.setChars(chars);
ElemTemplateElement parent = handler.getElemTemplateElement();
parent.appendChild(elem);
}
m_accumulator.setLength(0);
m_firstBackPointer = null;
}
protected Node m_firstBackPointer = null;
/**
* Receive notification of character data inside an element.
*
*
* @param handler non-null reference to current StylesheetHandler that is constructing the Templates.
* @param ch The characters.
* @param start The start position in the character array.
* @param length The number of characters to use from the
* character array.
* @throws org.xml.sax.SAXException Any SAX exception, possibly
* wrapping another exception.
* @see org.xml.sax.ContentHandler#characters
*/
public void characters(
StylesheetHandler handler, char ch[], int start, int length)
throws org.xml.sax.SAXException
{
m_accumulator.append(ch, start, length);
if(null == m_firstBackPointer)
m_firstBackPointer = handler.getOriginatingNode();
// Catch all events until a non-character event.
if (this != handler.getCurrentProcessor())
handler.pushProcessor(this);
}
/**
* Receive notification of the end of an element.
*
* @param handler The calling StylesheetHandler/TemplatesBuilder.
* @param uri The Namespace URI, or the empty string if the
* element has no Namespace URI or if Namespace
* processing is not being performed.
* @param localName The local name (without prefix), or the
* empty string if Namespace processing is not being
* performed.
* @param rawName The raw XML 1.0 name (with prefix), or the
* empty string if raw names are not available.
* @see org.apache.xalan.processor.StylesheetHandler#startElement
* @see org.apache.xalan.processor.StylesheetHandler#endElement
* @see org.xml.sax.ContentHandler#startElement
* @see org.xml.sax.ContentHandler#endElement
* @see org.xml.sax.Attributes
*/
public void endElement(
StylesheetHandler handler, String uri, String localName, String rawName)
throws org.xml.sax.SAXException
{
// Since this has been installed as the current processor, we
// may get and end element event, in which case, we pop and clear
// and then call the real element processor.
startNonText(handler);
handler.getCurrentProcessor().endElement(handler, uri, localName,
rawName);
handler.popProcessor();
}
/**
* Accumulate characters, until a non-whitespace event has
* occured.
*/
private StringBuffer m_accumulator = new StringBuffer();
/**
* The xsl:text processor will call this to set a
* preserve space state.
*/
private ElemText m_xslTextElement;
/**
* Set the current setXslTextElement. The xsl:text
* processor will call this to set a preserve space state.
*
* @param xslTextElement The current xslTextElement that
* is preserving state, or null.
*/
void setXslTextElement(ElemText xslTextElement)
{
m_xslTextElement = xslTextElement;
}
}