tohtmlsaxhandler.java

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    /**
     * Does nothing.
     * @see org.xml.sax.ext.LexicalHandler#endCDATA()
     */
    public void endCDATA() throws SAXException
    {
        return;
    }

    /**
     * Does nothing.
     * @see org.xml.sax.ext.LexicalHandler#endDTD()
     */
    public void endDTD() throws SAXException
    {
    }

    /**
     * Does nothing.
     * @see org.xml.sax.ext.LexicalHandler#startCDATA()
     */
    public void startCDATA() throws SAXException
    {
    }

    /**
     * Does nothing.
     * @see org.xml.sax.ext.LexicalHandler#startEntity(String)
     */
    public void startEntity(String arg0) throws SAXException
    {
    }

    /**
     * Receive notification of the end of a document.
     *
     * <p>The SAX parser will invoke this method only once, and it will
     * be the last method invoked during the parse.  The parser shall
     * not invoke this method until it has either abandoned parsing
     * (because of an unrecoverable error) or reached the end of
     * input.</p>
     *
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     *
     * @throws org.xml.sax.SAXException
     *
     *
     */
    public void endDocument() throws SAXException
    {
        flushPending();

        // Close output document
        m_saxHandler.endDocument();

        if (m_tracer != null)
            super.fireEndDoc();        
    }

    /**
     * This method is called when all the data needed for a call to the
     * SAX handler's startElement() method has been gathered.
     */
    protected void closeStartTag() throws SAXException
    {

        m_elemContext.m_startTagOpen = false;

        // Now is time to send the startElement event
        m_saxHandler.startElement(
            EMPTYSTRING,
            m_elemContext.m_elementName,
            m_elemContext.m_elementName,
            m_attributes);
        m_attributes.clear();       

    }

    /**
     * Do nothing.
     * @see SerializationHandler#close()
     */
    public void close()
    {
        return;
    }

    /**
     * Receive notification of character data.
     *
     * @param chars The string of characters to process.
     *
     * @throws org.xml.sax.SAXException
     *
     * @see ExtendedContentHandler#characters(String)
     */
    public void characters(final String chars) throws SAXException
    {
        final int length = chars.length();
        if (length > m_charsBuff.length)
        {
            m_charsBuff = new char[length * 2 + 1];
        }
        chars.getChars(0, length, m_charsBuff, 0);        
        this.characters(m_charsBuff, 0, length);
    }


    /**
     * A constructor
     * @param handler the wrapped SAX content handler
     * @param encoding the encoding of the output HTML document
     */
    public ToHTMLSAXHandler(ContentHandler handler, String encoding)
    {
        super(handler,encoding);
    }
    /**
     * A constructor.
     * @param handler the wrapped SAX content handler
     * @param lex the wrapped lexical handler
     * @param encoding the encoding of the output HTML document
     */
    public ToHTMLSAXHandler(
        ContentHandler handler,
        LexicalHandler lex,
        String encoding)
    {
        super(handler,lex,encoding);
    }

    /**
     * An element starts, but attributes are not fully known yet.
     *
     * @param elementNamespaceURI the URI of the namespace of the element
     * (optional)
     * @param elementLocalName the element name, but without prefix
     * (optional)
     * @param elementName the element name, with prefix, if any (required)
     *
     * @see ExtendedContentHandler#startElement(String)
     */
    public void startElement(
        String elementNamespaceURI,
        String elementLocalName,
        String elementName) throws SAXException
    {

        super.startElement(elementNamespaceURI, elementLocalName, elementName);

        flushPending();

        // Handle document type declaration (for first element only)
        if (!m_dtdHandled)
        {
            String doctypeSystem = getDoctypeSystem();
            String doctypePublic = getDoctypePublic();
            if ((doctypeSystem != null) || (doctypePublic != null)) {
                if (m_lexHandler != null)
                    m_lexHandler.startDTD(
                        elementName,
                        doctypePublic,
                        doctypeSystem);
            }
			m_dtdHandled = true;
        }
        m_elemContext = m_elemContext.push(elementNamespaceURI, elementLocalName, elementName);
    }
    /**
     * An element starts, but attributes are not fully known yet.
     *
     * @param elementName the element name, with prefix, if any
     *
     * @see ExtendedContentHandler#startElement(String)
     */
    public void startElement(String elementName) throws SAXException
    {
        this.startElement(null,null, elementName);
    }
    
    /**
     * Receive notification of the end of an element.
     * @param elementName The element type name
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *     wrapping another exception.
     *
     * @see ExtendedContentHandler#endElement(String)
     */
    public void endElement(String elementName) throws SAXException
    {
        flushPending();
        m_saxHandler.endElement(EMPTYSTRING, elementName, elementName);

        // time to fire off endElement event
		if (m_tracer != null)
            super.fireEndElem(elementName);        
    }

    /**
     * Receive notification of character data.
     *
     * <p>The Parser will call this method to report each chunk of
     * character data.  SAX parsers may return all contiguous character
     * data in a single chunk, or they may split it into several
     * chunks; however, all of the characters in any single event
     * must come from the same external entity, so that the Locator
     * provides useful information.</p>
     *
     * <p>The application must not attempt to read from the array
     * outside of the specified range.</p>
     *
     * <p>Note that some parsers will report whitespace using the
     * ignorableWhitespace() method rather than this one (validating
     * parsers must do so).</p>
     *
     * @param ch The characters from the XML document.
     * @param off The start position in the array.
     * @param len The number of characters to read from the array.
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @see #ignorableWhitespace
     * @see org.xml.sax.Locator
     *
     * @throws org.xml.sax.SAXException
     *
     * @see org.xml.sax.ContentHandler#characters(char[], int, int)
     */
    public void characters(char[] ch, int off, int len) throws SAXException
    {

        flushPending();
        m_saxHandler.characters(ch, off, len);

        // time to fire off characters event
		if (m_tracer != null)
            super.fireCharEvent(ch, off, len);        
    }

    /**
     * This method flushes any pending events, which can be startDocument()
     * closing the opening tag of an element, or closing an open CDATA section.
     */
    public void flushPending() throws SAXException
    {
		if (m_needToCallStartDocument)
		{
			startDocumentInternal();
			m_needToCallStartDocument = false;
		}       	
        // Close any open element
        if (m_elemContext.m_startTagOpen)
        {
            closeStartTag();
            m_elemContext.m_startTagOpen = false;
        }
    }
    /**
     * Handle a prefix/uri mapping, which is associated with a startElement()
     * that is soon to follow. Need to close any open start tag to make
     * sure than any name space attributes due to this event are associated wih
     * the up comming element, not the current one.
     * @see ExtendedContentHandler#startPrefixMapping
     *
     * @param prefix The Namespace prefix being declared.
     * @param uri The Namespace URI the prefix is mapped to.
     * @param shouldFlush true if any open tags need to be closed first, this
     * will impact which element the mapping applies to (open parent, or its up
     * comming child)
     * @return returns true if the call made a change to the current
     * namespace information, false if it did not change anything, e.g. if the
     * prefix/namespace mapping was already in scope from before.
     *
     * @throws org.xml.sax.SAXException The client may throw
     *            an exception during processing.
     */    
    public boolean startPrefixMapping(
        String prefix,
        String uri,
        boolean shouldFlush)
        throws SAXException
    {
        // no namespace support for HTML
        if (shouldFlush) 
            flushPending();   
        m_saxHandler.startPrefixMapping(prefix,uri);
        return false;
    }

    /**
     * Begin the scope of a prefix-URI Namespace mapping
     * just before another element is about to start.
     * This call will close any open tags so that the prefix mapping
     * will not apply to the current element, but the up comming child.
     *
     * @see org.xml.sax.ContentHandler#startPrefixMapping
     *
     * @param prefix The Namespace prefix being declared.
     * @param uri The Namespace URI the prefix is mapped to.
     *
     * @throws org.xml.sax.SAXException The client may throw
     *            an exception during processing.
     *
     */
    public void startPrefixMapping(String prefix, String uri)
        throws org.xml.sax.SAXException
    {
        startPrefixMapping(prefix,uri,true);        
    }

    /**
     * This method is used when a prefix/uri namespace mapping
     * is indicated after the element was started with a
     * startElement() and before and endElement().
     * startPrefixMapping(prefix,uri) would be used before the
     * startElement() call.
     * @param prefix the prefix associated with the given URI.
     * @param uri the URI of the namespace
     *
     * @see ExtendedContentHandler#namespaceAfterStartElement(String, String)
     */
    public void namespaceAfterStartElement(
        final String prefix,
        final String uri)
        throws SAXException
    {
        // hack for XSLTC with finding URI for default namespace
        if (m_elemContext.m_elementURI == null)
        {
            String prefix1 = getPrefixPart(m_elemContext.m_elementName);
            if (prefix1 == null && EMPTYSTRING.equals(prefix))
            {
                // the elements URI is not known yet, and it
                // doesn't have a prefix, and we are currently
                // setting the uri for prefix "", so we have
                // the uri for the element... lets remember it
                m_elemContext.m_elementURI = uri;
            }
        }       
        startPrefixMapping(prefix,uri,false);
    }
    
    /**
     * Try's to reset the super class and reset this class for 
     * re-use, so that you don't need to create a new serializer 
     * (mostly for performance reasons).
     * 
     * @return true if the class was successfuly reset.
     * @see Serializer#reset()
     */
    public boolean reset()
    {
        boolean wasReset = false;
        if (super.reset())
        {
            resetToHTMLSAXHandler();
            wasReset = true;
        }
        return wasReset;
    }
    
    /**
     * Reset all of the fields owned by ToHTMLSAXHandler class
     *
     */
    private void resetToHTMLSAXHandler()
    {
        this.m_escapeSetting = false;
    }  
}