tohtmlstream.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 1,886 行 · 第 1/5 页

     * @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 com.sun.org.apache.xml.internal.serializer.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 com.sun.org.apache.xml.internal.serializer.ExtendedContentHandler#namespaceAfterStartElement(String, String)
         */
        public void namespaceAfterStartElement(String prefix, 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);
        }

    public void startDTD(String name, String publicId, String systemId)
        throws SAXException
    {
        m_inDTD = true;
        super.startDTD(name, publicId, systemId);
    }

    /**
     * Report the end of DTD declarations.
     * @throws org.xml.sax.SAXException The application may raise an exception.
     * @see #startDTD
     */
    public void endDTD() throws org.xml.sax.SAXException
    {
        m_inDTD = false;
        /* for ToHTMLStream the DOCTYPE is entirely output in the
         * startDocumentInternal() method, so don't do anything here
         */
    }
    /**
     * This method does nothing.
     */
    public void attributeDecl(
        String eName,
        String aName,
        String type,
        String valueDefault,
        String value)
        throws SAXException
    {
        // The internal DTD subset is not serialized by the ToHTMLStream serializer
    }

    /**
     * This method does nothing.
     */
    public void elementDecl(String name, String model) throws SAXException
    {
        // The internal DTD subset is not serialized by the ToHTMLStream serializer
    }
    /**
     * This method does nothing.
     */
    public void internalEntityDecl(String name, String value)
        throws SAXException
    {
        // The internal DTD subset is not serialized by the ToHTMLStream serializer
    }
    /**
     * This method does nothing.
     */
    public void externalEntityDecl(
        String name,
        String publicId,
        String systemId)
        throws SAXException
    {
        // The internal DTD subset is not serialized by the ToHTMLStream serializer
    }

    /**
     * This method is used to add an attribute to the currently open element. 
     * The caller has guaranted that this attribute is unique, which means that it
     * not been seen before and will not be seen again.
     * 
     * @param name the qualified name of the attribute
     * @param value the value of the attribute which can contain only
     * ASCII printable characters characters in the range 32 to 127 inclusive.
     * @param flags the bit values of this integer give optimization information.
     */
    public void addUniqueAttribute(String name, String value, int flags)
        throws SAXException
    {
        try
        {
            final java.io.Writer writer = m_writer;
            if ((flags & NO_BAD_CHARS) > 0 && m_htmlcharInfo.onlyQuotAmpLtGt)
            {
                // "flags" has indicated that the characters
                // '>'  '<'   '&'  and '"' are not in the value and
                // m_htmlcharInfo has recorded that there are no other
                // entities in the range 0 to 127 so we write out the
                // value directly
                writer.write(' ');
                writer.write(name);
                writer.write("=\"");
                writer.write(value);
                writer.write('"');
            }
            else if (
                (flags & HTML_ATTREMPTY) > 0
                    && (value.length() == 0 || value.equalsIgnoreCase(name)))
            {
                writer.write(' ');
                writer.write(name);
            }
            else
            {
                writer.write(' ');
                writer.write(name);
                writer.write("=\"");
                if ((flags & HTML_ATTRURL) > 0)
                {
                    writeAttrURI(writer, value, m_specialEscapeURLs);
                }
                else
                {
                    writeAttrString(writer, value, this.getEncoding());
                }
                writer.write('"');
            }
        } catch (IOException e) {
            throw new SAXException(e);
        }
    }

    public void comment(char ch[], int start, int length)
            throws SAXException
    {
        // The internal DTD subset is not serialized by the ToHTMLStream serializer
        if (m_inDTD)
            return;
        super.comment(ch, start, length);
    }
    
    public boolean reset()
    {
        boolean ret = super.reset();
        if (!ret)
            return fa