/*
 * 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
 * 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 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 "ElemUse.hpp"


#include <cassert>


#include <xercesc/sax/AttributeList.hpp>


#include <PlatformSupport/StringTokenizer.hpp>


#include "StylesheetRoot.hpp"
#include "StylesheetConstructionContext.hpp"


/**
 * This acts as a superclass for ElemCopy, ElemAttributeSet,
 * ElemElement, and ElemLiteralResult, on order to implement 
 * shared behavior the use-attribute-sets attribute.
 */
ElemUse::ElemUse(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			int								lineNumber,
			int								columnNumber,
			int								xslToken) :
	ElemTemplateElement(constructionContext,
						stylesheetTree,
						lineNumber,
						columnNumber,
						xslToken),
	m_attributeSetsNames()
{
}


ElemUse::~ElemUse()
{
}


const XalanDOMString&
ElemUse::getElementName() const
{
	return Constants::ELEMNAME_USE_WITH_PREFIX_STRING;
}


void
ElemUse::postConstruction(
			StylesheetConstructionContext&	constructionContext,
			const NamespacesHandler&		theParentHandler)
{
	if (m_attributeSetsNames.size() != 0)
	{
		canGenerateAttributes(true);
	}

	// OK, now we can chain-up...
	ElemTemplateElement::postConstruction(constructionContext, theParentHandler);
}


void
ElemUse::execute(StylesheetExecutionContext&	executionContext) const
{
	doExecute(executionContext, true);
}


void
ElemUse::doExecute(
			StylesheetExecutionContext&		executionContext,
			bool							applyAttributeSets) const
{
	ElemTemplateElement::execute(executionContext);

	if(applyAttributeSets == true && 0 != m_attributeSetsNames.size())
	{
		assert(canGenerateAttributes() == true);

		getStylesheet().getStylesheetRoot().applyAttrSets(
				m_attributeSetsNames, 
				executionContext,
				executionContext.getCurrentNode());
	}
}


bool
ElemUse::processUseAttributeSets(
			StylesheetConstructionContext&	constructionContext,
			const XalanDOMChar*				attrName,
			const AttributeList&			atts,
			int								which)
{
	bool isUAS = false;

	if(Constants::ELEMNAME_LITERALRESULT == getXSLToken())
	{
		const XalanQNameByValue	qname(attrName, getStylesheet().getNamespaces());

		isUAS = ((equals(qname.getNamespace(),
			constructionContext.getXSLTNamespaceURI())) &&
			(equals(qname.getLocalPart(), Constants::ATTRNAME_USEATTRIBUTESETS)));
	}
	else
	{
		isUAS = equals(attrName, Constants::ATTRNAME_USEATTRIBUTESETS);
	}

	if(isUAS == true)
	{
		const XalanDOMChar* const	qnames = atts.getValue(which);

		StringTokenizer				tokenizer(qnames,
											  c_wstr(XALAN_STATIC_UCODE_STRING(" \t\n\r")),
											  false);

		m_attributeSetsNames.reserve(tokenizer.countTokens());

		XalanDOMString	qname;

		while(tokenizer.hasMoreTokens())
		{
			tokenizer.nextToken(qname);
			assert(length(qname) != 0);

			m_attributeSetsNames.push_back(
				QNameVectorType::value_type(
					qname,
					getStylesheet().getNamespaces()));
		}
	}

	return isUAS;
}