src/XSLT/StylesheetExecutionContext.cpp

/*
 * 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
 * modification, 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 "Xalan" 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 (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * 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 based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#include "StylesheetExecutionContext.hpp"



#include <XMLSupport/FormatterToText.hpp>



#include "ElemTemplateElement.hpp"



StylesheetExecutionContext::StylesheetExecutionContext() :
	XPathExecutionContext()
{
}



StylesheetExecutionContext::~StylesheetExecutionContext()
{
}



StylesheetExecutionContext::ParamsPushPop::ParamsPushPop(
			StylesheetExecutionContext&		executionContext,
			const ElemTemplateElement&		xslCallTemplateElement,
			XalanNode*						sourceNode,
			const ElemTemplateElement*		targetTemplate) :
	m_executionContext(executionContext),
	m_savedStackFrameIndex(executionContext.getCurrentStackFrameIndex())
{
	// It would be cleaner to replace these two lines with separate
	// subobjects, but that would means saving two more copies of
	// the execution context on the stack.  Instead, we're just using
	// a catch block to make sure that the code in the destructor runs
	// if there's a problem pushing the params.
	executionContext.pushContextMarker();

	executionContext.setCurrentStackFrameIndex(m_savedStackFrameIndex);

	try
	{
		if (xslCallTemplateElement.hasParams() == true)
		{
			executionContext.pushParams(
						xslCallTemplateElement,
						sourceNode,
						targetTemplate);
		}

		executionContext.setCurrentStackFrameIndex();
	}
	catch(...)
	{
		m_executionContext.setCurrentStackFrameIndex(m_savedStackFrameIndex);

		m_executionContext.popContextMarker();

		throw;
	}
}



StylesheetExecutionContext::ParamsPushPop::~ParamsPushPop()
{
	m_executionContext.setCurrentStackFrameIndex(m_savedStackFrameIndex);

	m_executionContext.popContextMarker();
}



StylesheetExecutionContext::BorrowReturnFormatterToText::BorrowReturnFormatterToText(
			StylesheetExecutionContext&		executionContext,
			Writer&							writer,
			bool							normalizeLinefeed,
			bool							handleIgnorableWhitespace)  :
	m_executionContext(executionContext),
	m_formatter(executionContext.borrowFormatterToText())
{
	assert(m_formatter != 0);

	m_formatter->setNormalizeLinefeed(normalizeLinefeed);
	m_formatter->setHandleIgnorableWhitespace(handleIgnorableWhitespace);
	m_formatter->clearEncoding();
	m_formatter->setWriter(&writer);
}