src/xalanc/XSLT/ElemPI.cpp

/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed 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.
 */
#include "ElemPI.hpp"



#include <xercesc/sax/AttributeList.hpp>



#include <xalanc/PlatformSupport/DOMStringHelper.hpp>
#include <xalanc/PlatformSupport/XalanMessageLoader.hpp>



#include "AVT.hpp"
#include "Constants.hpp"
#include "StylesheetConstructionContext.hpp"
#include "StylesheetExecutionContext.hpp"



XALAN_CPP_NAMESPACE_BEGIN



ElemPI::ElemPI(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			const AttributeListType&		atts,
			int								lineNumber,
			int								columnNumber) :
	ElemTemplateElement(constructionContext,
						stylesheetTree,
						lineNumber,
						columnNumber,
						StylesheetConstructionContext::ELEMNAME_PI),
	m_nameAVT(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_NAME))
		{			
			m_nameAVT =
					constructionContext.createAVT(getLocator(), aname, atts.getValue(i), *this);
		}
		else if(isAttrOK(aname, atts, i, constructionContext) == false ||
				processSpaceAttr(aname, atts, i, constructionContext))
		{
			constructionContext.error(
					XalanMessageLoader::getMessage(
						XalanMessages::TemplateHasIllegalAttribute_2Param,
							Constants::ELEMNAME_PI_WITH_PREFIX_STRING.c_str(),
							aname),
					0,
					this);
		}
	}

	if(0 == m_nameAVT)
	{
		constructionContext.error(
			XalanMessageLoader::getMessage(
				XalanMessages::TemplateMustHaveAttribute_2Param,
				Constants::ELEMNAME_PI_WITH_PREFIX_STRING,
				Constants::ATTRNAME_NAME),
			0,
			this);
	}
}



ElemPI::~ElemPI()
{
}



const XalanDOMString&
ElemPI::getElementName() const
{
	return Constants::ELEMNAME_PI_WITH_PREFIX_STRING;
}



#if !defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
const ElemTemplateElement*
ElemPI::startElement(StylesheetExecutionContext& executionContext) const
{
	ElemTemplateElement::startElement(executionContext);
	
	XalanDOMString&	piName = executionContext.getAndPushCachedString();

	m_nameAVT->evaluate(piName, *this, executionContext);

	if(equalsIgnoreCaseASCII(piName, Constants::ATTRVAL_OUTPUT_METHOD_XML))
	{
		executionContext.error(
			XalanMessageLoader::getMessage(XalanMessages::NameCanNotBe_1Param,"xml"),
			0, getLocator());
	}
	else if(!isValidNCName(piName))
	{
		executionContext.error(
			XalanMessageLoader::getMessage(XalanMessages::NameMustBeValidNCName),
			0, getLocator());
	}

	XalanDOMString& theResult = executionContext.getAndPushCachedString();

	executionContext.pushCopyTextNodesOnly(true);

	return beginChildrenToString(executionContext,theResult);
}



void
ElemPI::endElement(StylesheetExecutionContext& executionContext) const
{
	endChildrenToString(executionContext);

	XalanDOMString & theResult = executionContext.getAndPopCachedString();
	XalanDOMString & piName = executionContext.getAndPopCachedString();

	executionContext.processingInstruction(
				c_wstr(piName),
				c_wstr(theResult));

	executionContext.popCopyTextNodesOnly();
}
#endif



#if defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
void
ElemPI::execute(StylesheetExecutionContext&		executionContext) const
{
	ElemTemplateElement::execute(executionContext);
	
	StylesheetExecutionContext::GetAndReleaseCachedString	theGuard(executionContext);

	XalanDOMString&		piName = theGuard.get();

	m_nameAVT->evaluate(piName, *this, executionContext);

	if(equalsIgnoreCaseASCII(piName, Constants::ATTRVAL_OUTPUT_METHOD_XML))
	{
		executionContext.error(
			XalanMessageLoader::getMessage(XalanMessages::NameCanNotBe_1Param,"xml"),
			0, getLocator());
	}
	else if(!isValidNCName(piName))
	{
		executionContext.error(
			XalanMessageLoader::getMessage(XalanMessages::NameMustBeValidNCName),
			0, getLocator());
	}

	StylesheetExecutionContext::SetAndRestoreCopyTextNodesOnly	theSetAndRestore(executionContext, true);

	childrenToResultPI(
			executionContext,
			piName);
}
#endif



bool
ElemPI::childTypeAllowed(int	xslToken) const
{
	bool	fResult = false;
	
	switch(xslToken)
	{
	// char-instructions 
	case StylesheetConstructionContext::ELEMNAME_TEXT_LITERAL_RESULT:
	case StylesheetConstructionContext::ELEMNAME_APPLY_TEMPLATES:
	case StylesheetConstructionContext::ELEMNAME_APPLY_IMPORTS:
	case StylesheetConstructionContext::ELEMNAME_CALL_TEMPLATE:
	case StylesheetConstructionContext::ELEMNAME_FOR_EACH:
	case StylesheetConstructionContext::ELEMNAME_VALUE_OF:
	case StylesheetConstructionContext::ELEMNAME_COPY_OF:
	case StylesheetConstructionContext::ELEMNAME_NUMBER:
	case StylesheetConstructionContext::ELEMNAME_CHOOSE:
	case StylesheetConstructionContext::ELEMNAME_IF:
	case StylesheetConstructionContext::ELEMNAME_TEXT:
	case StylesheetConstructionContext::ELEMNAME_COPY:
	case StylesheetConstructionContext::ELEMNAME_VARIABLE:
	case StylesheetConstructionContext::ELEMNAME_MESSAGE:
		fResult = true;
		break;
		
	default:
		break;
	}
	
	return fResult;
}



XALAN_CPP_NAMESPACE_END