tohtmlstream.java

来自「Mobile 应用程序使用 Java Micro Edition (Java M」· Java 代码 · 共 1,824 行 · 第 1/5 页

     *
     * @param chars The characters from the XML document.
     * @param start The start position in the array.
     * @param length 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
     */
    public final void characters(char chars[], int start, int length)
        throws org.xml.sax.SAXException
    {

        if (m_elemContext.m_isRaw)
        {
            try
            {
                if (m_elemContext.m_startTagOpen)
                {
                    closeStartTag();
                    m_elemContext.m_startTagOpen = false;
                }
                m_ispreserve = true;
                
//              With m_ispreserve just set true it looks like shouldIndent()
//              will always return false, so drop any possible indentation.
//              if (shouldIndent())
//                  indent();

                // writer.write("<![CDATA[");
                // writer.write(chars, start, length);
                writeNormalizedChars(chars, start, length, false, m_lineSepUse);

                // writer.write("]]>");
                
                // time to generate characters event
                if (m_tracer != null)
                    super.fireCharEvent(chars, start, length);
                
                return;
            }
            catch (IOException ioe)
            {
                throw new org.xml.sax.SAXException(
                    Utils.messages.createMessage(
                        MsgKey.ER_OIERROR,
                        null),
                    ioe);
                //"IO error", ioe);
            }
        }
        else
        {
            super.characters(chars, start, length);
        }
    }

    /**
     *  Receive notification of cdata.
     *
     *  <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 start The start position in the array.
     *  @param length 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
     */
    public final void cdata(char ch[], int start, int length)
        throws org.xml.sax.SAXException
    {

        if ((null != m_elemContext.m_elementName)
            && (m_elemContext.m_elementName.equalsIgnoreCase("SCRIPT")
                || m_elemContext.m_elementName.equalsIgnoreCase("STYLE")))
        {
            try
            {
                if (m_elemContext.m_startTagOpen)
                {
                    closeStartTag();
                    m_elemContext.m_startTagOpen = false;
                }

                m_ispreserve = true;

                if (shouldIndent())
                    indent();

                // writer.write(ch, start, length);
                writeNormalizedChars(ch, start, length, true, m_lineSepUse);
            }
            catch (IOException ioe)
            {
                throw new org.xml.sax.SAXException(
                    Utils.messages.createMessage(
                        MsgKey.ER_OIERROR,
                        null),
                    ioe);
                //"IO error", ioe);
            }
        }
        else
        {
            super.cdata(ch, start, length);
        }
    }

    /**
     *  Receive notification of a processing instruction.
     *
     *  @param target The processing instruction target.
     *  @param data The processing instruction data, or null if
     *         none was supplied.
     *  @throws org.xml.sax.SAXException Any SAX exception, possibly
     *             wrapping another exception.
     *
     * @throws org.xml.sax.SAXException
     */
    public void processingInstruction(String target, String data)
        throws org.xml.sax.SAXException
    {

        // Process any pending starDocument and startElement first.
        flushPending(); 
        
        // Use a fairly nasty hack to tell if the next node is supposed to be 
        // unescaped text.
        if (target.equals(Result.PI_DISABLE_OUTPUT_ESCAPING))
        {
            startNonEscaping();
        }
        else if (target.equals(Result.PI_ENABLE_OUTPUT_ESCAPING))
        {
            endNonEscaping();
        }
        else
        {
            try
            {
            if (m_elemContext.m_startTagOpen)
            {
                closeStartTag();
                m_elemContext.m_startTagOpen = false;
            }
            else if (m_needToCallStartDocument)
                startDocumentInternal();

            if (shouldIndent())
                indent();

            final java.io.Writer writer = m_writer;
            //writer.write("<?" + target);
            writer.write("<?");
            writer.write(target);

            if (data.length() > 0 && !Character.isSpaceChar(data.charAt(0)))
                writer.write(' '); 

            //writer.write(data + ">"); // different from XML
            writer.write(data); // different from XML
            writer.write('>'); // different from XML

            // Always output a newline char if not inside of an 
            // element. The whitespace is not significant in that
            // case.
            if (m_elemContext.m_currentElemDepth <= 0)
                outputLineSep();

            m_startNewLine = true;
            }
            catch(IOException e)
            {
                throw new SAXException(e);
            }
        }
               
        // now generate the PI event
        if (m_tracer != null)
            super.fireEscapingEvent(target, data);
     }

    /**
     * Receive notivication of a entityReference.
     *
     * @param name non-null reference to entity name string.
     *
     * @throws org.xml.sax.SAXException
     */
    public final void entityReference(String name)
        throws org.xml.sax.SAXException
    {
        try
        {

        final java.io.Writer writer = m_writer;
        writer.write('&');
        writer.write(name);
        writer.write(';');
        
        } catch(IOException e)
        {
            throw new SAXException(e);
        }
    }
    /**
     * @see ExtendedContentHandler#endElement(String)
     */
    public final void endElement(String elemName) throws SAXException
    {
        endElement(null, null, elemName);
    }

    /**
     * Process the attributes, which means to write out the currently
     * collected attributes to the writer. The attributes are not
     * cleared by this method
     * 
     * @param writer the writer to write processed attributes to.
     * @param nAttrs the number of attributes in m_attributes 
     * to be processed
     *
     * @throws org.xml.sax.SAXException
     */
    public void processAttributes(java.io.Writer writer, int nAttrs)
        throws IOException,SAXException
    {
            /* 
             * process the collected attributes
             */
            for (int i = 0; i < nAttrs; i++)
            {
                processAttribute(
                    writer,
                    m_attributes.getQName(i),
                    m_attributes.getValue(i),
                    m_elemContext.m_elementDesc);
            }
    }

    /**
     * For the enclosing elements starting tag write out out any attributes
     * followed by ">"
     *
     *@throws org.xml.sax.SAXException
     */
    protected void closeStartTag() throws SAXException
    {
            try
            {

            // finish processing attributes, time to fire off the start element event
            if (m_tracer != null)
                super.fireStartElem(m_elemContext.m_elementName);  
            
            int nAttrs = m_attributes.getLength();   
            if (nAttrs>0)
            {
                processAttributes(m_writer, nAttrs);
                // clear attributes object for re-use with next element
                m_attributes.clear();
            }

            m_writer.write('>');

            /* whether Xalan or XSLTC, we have the prefix mappings now, so
             * lets determine if the current element is specified in the cdata-
             * section-elements list.
             */
            if (m_cdataSectionElements != null) 
                m_elemContext.m_isCdataSection = isCdataSection();
            if (m_doIndent)
            {
                m_isprevtext = false;
                m_preserves.push(m_ispreserve);
            }
            
            }
            catch(IOException e)
            {
                throw new SAXException(e);
            }
    }
    /**
     * Initialize the serializer with the specified output stream and output
     * format. Must be called before calling any of the serialize methods.
     *
     * @param output The output stream to use
     * @param format The output format
     * @throws UnsupportedEncodingException The encoding specified   in the
     * output format is not supported
     */
    protected synchronized void init(OutputStream output, Properties format)
        throws UnsupportedEncodingException
    {
        if (null == format)
        {
            format = OutputPropertiesFactory.getDefaultMethodProperties(Method.HTML);
         }
        super.init(output,format, false);
    }
    
        /**
         * Specifies an output stream to which the document should be
         * serialized. This method should not be called while the
         * serializer is in the process of serializing a document.
         * <p>
         * The encoding specified in the output properties is used, or
         * if no encoding was specified, the default for the selected
         * output method.
         *
         * @param output The output stream
         */
        public void setOutputStream(OutputStream output)
        {

            try
            {
                Properties format;
                if (null == m_format)
                    format = OutputPropertiesFactory.getDefaultMethodProperties(Method.HTML);
                else
                    format = m_format;
                init(output, format, true);
            }
            catch (UnsupportedEncodingException uee)
            {

                // Should have been warned in init, I guess...
            }
        }    
        /**
         * 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 uri the URI of the namespace
         * @param prefix the prefix associated with the given URI.
         *
         * @see ExtendedContentHandler#namespaceAfterStartElement(String, String)
         */
        public void namespaceAfterStartElement(String prefix, String uri)
            throws SAXException
        {
            // hack for XSLTC with