/*
 * 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.
 */

#include "ExtensionNSHandler.hpp"


#include <cassert>


#include <xalanc/XalanDOM/XalanElement.hpp>


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


#include "StylesheetExecutionContext.hpp"


namespace XALAN_CPP_NAMESPACE {


class XSLTProcessor;


struct XSLProcessorContext
{
    const XSLTProcessor&    m_processor;
    const Stylesheet&       m_stylesheetTree;
    const XalanNode*        m_sourceTree;
    const XalanNode*        m_sourceNode;
    const XalanQName&       m_mode;

    XSLProcessorContext(
            const XSLTProcessor&    processor,
            const Stylesheet&       stylesheetTree, 
            const XalanNode*        sourceTree,
            const XalanNode*        sourceNode,
            const XalanQName&       mode) :
        m_processor(processor),
        m_stylesheetTree(stylesheetTree),
        m_sourceTree(sourceTree),
        m_sourceNode(sourceNode),
        m_mode(mode)
    {
    }
};


/**
 * Construct a new extension namespace handler for a given extension NS.
 * This doesn't do anything - just hang on to the namespace URI.
 * 
 * @param namespaceUri the extension namespace URI that I'm implementing
 */
ExtensionNSHandler::ExtensionNSHandler(
            const XalanDOMString&   namespaceUri,
            MemoryManager&          theManager) :
    ExtensionFunctionHandler(namespaceUri, theManager),
    m_elements(theManager),
    m_componentDescLoaded(false)
{
}


ExtensionNSHandler*
ExtensionNSHandler::create(
            const XalanDOMString&   namespaceUri,
            MemoryManager&          theManager)
{
    typedef ExtensionNSHandler  ThisType;

    XalanAllocationGuard    theGuard(theManager, theManager.allocate(sizeof(ThisType)));

    ThisType* const     theResult =
        new (theGuard.get()) ThisType(
                                namespaceUri,
                                theManager);

    theGuard.release();

    return theResult;
}


ExtensionNSHandler::ExtensionNSHandler (
            MemoryManager&          theManager,
            const XalanDOMString&   namespaceUri,
            const XalanDOMString&   elemNames,
            const XalanDOMString&   funcNames,
            const XalanDOMString&   lang,
            const XalanDOMString&   srcURL,
            const XalanDOMString&   src) :
    ExtensionFunctionHandler(theManager, namespaceUri, funcNames, lang, srcURL, src),
    m_elements(theManager),
    m_componentDescLoaded(true)
         
{
    setElements(elemNames);
}


void
ExtensionNSHandler::setFunctions(const XalanDOMString&  funcNames)
{
    ExtensionFunctionHandler::setFunctions(funcNames);

    m_componentDescLoaded = true;
}


void
ExtensionNSHandler::setScript(
            const XalanDOMString&   lang,
            const XalanDOMString&   srcURL,
            const XalanDOMString&   scriptSrc)
{
    ExtensionFunctionHandler::setScript(lang, srcURL, scriptSrc);

    m_componentDescLoaded = true;
}


void
ExtensionNSHandler::setElements(const XalanDOMString&   elemNames)
{
    if (elemNames.empty() == false)
    {
        StringTokenizer     st(elemNames, s_tokenDelimiterCharacters, false);

        XalanDOMString theResult(m_elements.getMemoryManager());

        while (st.hasMoreTokens() == true)
        {
            st.nextToken(theResult);

            m_elements.insert(theResult); // just stick it in there basically
        }
    
        m_componentDescLoaded = true;
    }
}


bool
ExtensionNSHandler::isElementAvailable(const XalanDOMString&    element) const
{
    return (m_elements.find(element) != m_elements.end());
}


void
ExtensionNSHandler::processElement(
            StylesheetExecutionContext&     /* executionContext */,
            const XalanDOMString&           /* localPart */,
            const XalanElement*             /* element */,
            Stylesheet&                     /* stylesheetTree */, 
            const XalanNode*                /* sourceTree */,
            const XalanNode*                /* sourceNode */,
            const XalanQName&               /* mode */)
{
}


void
ExtensionNSHandler::startupComponent()
{
    ExtensionFunctionHandler::startupComponent();
}


void
ExtensionNSHandler::loadComponentDescription()
{
    assert(0);      // Don't try this in C++
}


XalanDOMString&
ExtensionNSHandler::getScriptString(const XalanElement&     /* elem */,
                                    XalanDOMString& theResult)
{
    theResult.erase();
    return theResult;
}


}