src/XSLT/ElemApplyTemplates.cpp

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999-2002 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
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 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
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 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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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 "ElemApplyTemplates.hpp"



#include <xercesc/sax/AttributeList.hpp>



#include <XPath/XalanQNameByValue.hpp>



#include "Constants.hpp"
#include "Stylesheet.hpp"
#include "StylesheetRoot.hpp"
#include "StylesheetConstructionContext.hpp"
#include "StylesheetExecutionContext.hpp"
#include "TracerEvent.hpp"



XALAN_CPP_NAMESPACE_BEGIN



static const XalanQNameByValue	s_defaultMode;



ElemApplyTemplates::ElemApplyTemplates(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			const AttributeListType&		atts,
			int								lineNumber,
			int								columnNumber) :
	ParentType(
		constructionContext,
		stylesheetTree,
		lineNumber,
		columnNumber,
		StylesheetConstructionContext::ELEMNAME_APPLY_TEMPLATES),
	m_mode(0)
{
	const unsigned	int nAttrs = atts.getLength();

	for(unsigned int i = 0; i < nAttrs; i++)
	{
		const XalanDOMChar*	const	aname = atts.getName(i);

		if (equals(aname, Constants::ATTRNAME_SELECT))
		{
			m_selectPattern = constructionContext.createXPath(getLocator(), atts.getValue(i), *this);
		}
		else if (equals(aname, Constants::ATTRNAME_MODE))
		{
			m_mode = constructionContext.createXalanQName(atts.getValue(i), getStylesheet().getNamespaces(), getLocator());
		}
		else if (!isAttrOK(aname, atts, i, constructionContext))
		{
			constructionContext.error(
					"xsl:apply-templates has an illegal attribute",
					0,
					this);
		}
	}

	if(0 == m_selectPattern)
	{
		m_selectPattern = constructionContext.createXPath(
			getLocator(),
			Constants::PSEUDONAME_NODE,
			*this);
	}

	if (m_mode == 0)
	{
		m_mode = &s_defaultMode;
	}
	else if (m_mode->isValid() == false)
	{
		constructionContext.error(
				"xsl:apply-templates has an illegal 'mode' attribute",
				0,
				this);
	}

	assert(m_selectPattern != 0 && m_mode != 0);
}



ElemApplyTemplates::~ElemApplyTemplates()
{
}



const XalanDOMString&
ElemApplyTemplates::getElementName() const
{
	return Constants::ELEMNAME_APPLY_TEMPLATES_WITH_PREFIX_STRING;
}



void
ElemApplyTemplates::execute(StylesheetExecutionContext&		executionContext) const
{
	assert(m_selectPattern != 0 && m_mode != 0);

	if(0 != executionContext.getTraceListeners())
	{
		executionContext.fireTraceEvent(TracerEvent(
		  executionContext, *this));
	}

	ParentType::transformSelectedChildren(
			executionContext,
			0);
}



void
ElemApplyTemplates::transformChild(
			StylesheetExecutionContext&		executionContext,
			const ElemTemplateElement&		xslInstruction,
			const ElemTemplateElement*		theTemplate,
			XalanNode*						child) const
{
	assert(child != 0);

	const XalanNode::NodeType	nodeType = child->getNodeType();

	// Filter out any attributes nodes that are namespace declarations
	if (nodeType != XalanNode::ATTRIBUTE_NODE ||
#if defined(XALAN_OLD_STYLE_CASTS)
		DOMServices::isNamespaceDeclaration((const XalanAttr&)*child) == false)
#else
		DOMServices::isNamespaceDeclaration(static_cast<const XalanAttr&>(*child)) == false)
#endif
	{
		ParentType::transformChild(
			executionContext,
			xslInstruction,
			theTemplate,
			child,
			nodeType);
	}
}



void
ElemApplyTemplates::selectAndSortChildren(
			StylesheetExecutionContext&		executionContext,
			const ElemTemplateElement*		theTemplate,
			NodeSorter*						sorter,
			int								/* selectStackFrameIndex */) const
{
	XalanNode* const	sourceNode = executionContext.getCurrentNode();
	assert(sourceNode != 0);

	// Push the params & stack frame, but then execute the select
	// expression inside transformSelectedChildren, which must be
	// executed in the stack frame before the new stack frame.
	StylesheetExecutionContext::ParamsPushPop	thePushPop(
			executionContext,
			*this,
			sourceNode,
			this);

	const XalanQName* const		currentMode = executionContext.getCurrentMode();
	assert(currentMode != 0);

	if (isDefaultTemplate() == false &&
		!m_mode->equals(*currentMode))
	{
		executionContext.setCurrentMode(m_mode);

		ParentType::selectAndSortChildren(
				executionContext,
				theTemplate,
				sorter,
				thePushPop.getStackFrameIndex());

		executionContext.setCurrentMode(currentMode);
	}
	else
	{
		ParentType::selectAndSortChildren(
				executionContext,
				theTemplate,
				sorter,
				thePushPop.getStackFrameIndex());
	}
}



bool
ElemApplyTemplates::childTypeAllowed(int	xslToken) const
{
	bool	fResult = false;

	switch(xslToken)
	{
	case StylesheetConstructionContext::ELEMNAME_SORT:
	case StylesheetConstructionContext::ELEMNAME_WITH_PARAM:
		fResult = true;
		break;

	default:
		break;
	}

	return fResult;
}



XALAN_CPP_NAMESPACE_END