src/xalanc/XSLT/GenerateEvent.hpp

/*
 * 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.
 */
#if !defined(XALAN_GenerateEvent_HEADER_GUARD)
#define XALAN_GenerateEvent_HEADER_GUARD 



// Base include file.  Must be first.
#include <xalanc/XSLT/XSLTDefinitions.hpp>



#include <xalanc/XalanDOM/XalanDOMString.hpp>



namespace XERCES_CPP_NAMESPACE { class AttributeList; }



XALAN_CPP_NAMESPACE_BEGIN



typedef xercesc::AttributeList    AttributeListType;



/** 
 * This is the class for events generated by the XSL processor
 * after it generates a new node in the result tree.  It responds
 * to, and so is modeled from, the SAX events that are sent to the
 * FormatterListener classes.
 * 
 * @see org.apache.xml.xpath4j.xml.FormatterListener
 */
class XALAN_XSLT_EXPORT GenerateEvent
{
public:

    enum EventType
    {
        /** 
         * Event type generated when a document begins.
         * 
         */
        EVENTTYPE_STARTDOCUMENT = 1,
            
        /** 
         * Event type generated when a document ends.
         */
        EVENTTYPE_ENDDOCUMENT = 2,
        
        /** 
         * Event type generated when an element begins (after the attributes have been processed but before the children have been added).
         */
        EVENTTYPE_STARTELEMENT = 3,
        
        /** 
         * Event type generated when an element ends, after it's children have been added.
         */
        EVENTTYPE_ENDELEMENT = 4,
        
        /** 
         * Event type generated for character data (CDATA and Ignorable Whitespace have their own events).
         */
        EVENTTYPE_CHARACTERS = 5,
        
        /** 
         * Event type generated for ignorable whitespace (I'm not sure how much this is actually called.
         */
        EVENTTYPE_IGNORABLEWHITESPACE = 6,

        /** 
         * Event type generated for processing instructions.
         */
        EVENTTYPE_PI = 7,

        /** 
         * Event type generated after a comment has been added.
         */
        EVENTTYPE_COMMENT = 8,

        /** 
         * Event type generate after an entity ref is created.
         */
        EVENTTYPE_ENTITYREF = 9,

        /** 
         * Event type generated after CDATA is generated.
         */
        EVENTTYPE_CDATA = 10
    };


    /** 
     * Constructor for startDocument, endDocument events.
     * 
     * @param eventType one of the EVENTTYPE_XXX constants
     */
    GenerateEvent(EventType             eventType,
                  MemoryManager&    theManager);
    
    /** 
    * Constructor for startElement, endElement events.
    * 
    * @param eventType one of the EVENTTYPE_XXX constants
    * @param name      name of the element
    * @param atts      SAX attribute list
    */
    GenerateEvent(
            EventType               eventType,
            MemoryManager&      theManager,
            const XalanDOMChar*     name,
            AttributeListType*      atts);

    /** 
    * Constructor for startElement, endElement events.
    * 
    * @param eventType one of the EVENTTYPE_XXX constants
    * @param name      name of the element
    * @param atts      SAX attribute list
    */
    GenerateEvent(
            EventType                   eventType,
            MemoryManager&          theManager,
            const XalanDOMString&       name,
            const AttributeListType*    atts = 0);

    /** 
    * Constructor for characters, cdate events.
    *
    * @param eventType one of the EVENTTYPE_XXX constants
    * @param ch        char array from the SAX event
    * @param start     start offset to be used in the char array
    * @param length    end offset to be used in the chara array
    */
    GenerateEvent(
            EventType                   eventType,
            MemoryManager&          theManager,
            const XalanDOMChar*         ch,
            XalanDOMString::size_type   start,
            XalanDOMString::size_type   length);
    
    /** 
    * Constructor for processingInstruction events.
    * 
    * @param eventType one of the EVENTTYPE_XXX constants
    * @param name      name of the processing instruction
    * @param data      processing instruction data
    */
    GenerateEvent(
            EventType               eventType,
            MemoryManager&      theManager,
            const XalanDOMChar*     name,
            const XalanDOMChar*     data);
    
    /** 
    * Constructor for comment and entity ref events.
    * 
    * @param processor XSLT processor instance
    * @param eventType one of the EVENTTYPE_XXX constants
    * @param data      comment or entity ref data
    */
    GenerateEvent(
            EventType               eventType,
            MemoryManager&      theManager,
            const XalanDOMChar*     data);

    /** 
     * The type of SAX event that was generated, as enumerated in the
     * EVENTTYPE_XXX constants above.
     */
    EventType               m_eventType;

    /** 
     * Character data from a character or cdata event.
     */
    XalanDOMString          m_characters;

    /** 
     * The start position of the current data in m_characters.
     */
    XalanDOMString::size_type   m_start;

    /** 
     * The length of the current data in m_characters.
     */
    XalanDOMString::size_type   m_length;

    /** 
     * The name of the element or PI.
     */
    XalanDOMString          m_name;

    /** 
     * The string data in the element (comments and PIs).
     */
    XalanDOMString          m_data;

    /** 
     * The current attribute list.
     */
    const AttributeListType*    m_pAtts;
private:
    // not imlplemented
    GenerateEvent();
    GenerateEvent(const GenerateEvent&);
};



XALAN_CPP_NAMESPACE_END



#endif  //XALAN_GenerateEvent_HEADER_GUARD