serializertohtml.java

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/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, Lotus
 * Development Corporation., http://www.lotus.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.xalan.serialize;

import java.util.Stack;

import java.io.Writer;
import java.io.IOException;

import java.util.Hashtable;
import java.util.Vector;
import java.util.Properties;
import java.util.BitSet;

import org.xml.sax.*;

import org.apache.xml.utils.BoolStack;
import org.apache.xml.utils.Trie;
import org.apache.xml.utils.FastStringBuffer;
import org.apache.xalan.res.XSLMessages;
import org.apache.xpath.res.XPATHErrorResources;
import org.apache.xml.utils.StringToIntTable;
import org.apache.xalan.templates.OutputProperties;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;

/**
 * <meta name="usage" content="general"/>
 * SerializerToHTML formats SAX-style events into XML.
 */
public class SerializerToHTML extends SerializerToXML
{

  /** State stack to keep track of if the current element has output 
   *  escaping disabled. */
  protected BoolStack m_isRawStack = new BoolStack();

  /** True if the current element is a block element.  (seems like 
   *  this needs to be a stack. -sb). */
  private boolean m_inBlockElem = false;

  /**
   * Map that tells which XML characters should have special treatment, and it
   *  provides character to entity name lookup.
   */
  protected static CharInfo m_htmlcharInfo =
    new CharInfo(CharInfo.HTML_ENTITIES_RESOURCE);

  /** A digital search trie for fast, case insensitive lookup of ElemDesc objects. */
  static Trie m_elementFlags = new Trie();

  static
  {

    // HTML 4.0 loose DTD
    m_elementFlags.put("BASEFONT", new ElemDesc(0 | ElemDesc.EMPTY));
    m_elementFlags.put("FRAME",
                       new ElemDesc(0 | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("FRAMESET", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("NOFRAMES", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("ISINDEX",
                       new ElemDesc(0 | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("APPLET",
                       new ElemDesc(0 | ElemDesc.WHITESPACESENSITIVE));
    m_elementFlags.put("CENTER", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("DIR", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("MENU", new ElemDesc(0 | ElemDesc.BLOCK));

    // HTML 4.0 strict DTD
    m_elementFlags.put("TT", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("I", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("B", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("BIG", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("SMALL", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("EM", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("STRONG", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("DFN", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("CODE", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("SAMP", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("KBD", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("VAR", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("CITE", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("ABBR", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("ACRONYM", new ElemDesc(0 | ElemDesc.PHRASE));
    m_elementFlags.put("SUP",
                       new ElemDesc(0 | ElemDesc.SPECIAL
                                    | ElemDesc.ASPECIAL));
    m_elementFlags.put("SUB",
                       new ElemDesc(0 | ElemDesc.SPECIAL
                                    | ElemDesc.ASPECIAL));
    m_elementFlags.put("SPAN",
                       new ElemDesc(0 | ElemDesc.SPECIAL
                                    | ElemDesc.ASPECIAL));
    m_elementFlags.put("BDO",
                       new ElemDesc(0 | ElemDesc.SPECIAL
                                    | ElemDesc.ASPECIAL));
    m_elementFlags.put("BR",
                       new ElemDesc(0 | ElemDesc.SPECIAL | ElemDesc.ASPECIAL
                                    | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("BODY", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("ADDRESS",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("DIV",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("A", new ElemDesc(0 | ElemDesc.SPECIAL));
    m_elementFlags.put("MAP",
                       new ElemDesc(0 | ElemDesc.SPECIAL | ElemDesc.ASPECIAL
                                    | ElemDesc.BLOCK));
    m_elementFlags.put("AREA",
                       new ElemDesc(0 | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("LINK",
                       new ElemDesc(0 | ElemDesc.HEADMISC | ElemDesc.EMPTY
                                    | ElemDesc.BLOCK));
    m_elementFlags.put("IMG",
                       new ElemDesc(0 | ElemDesc.SPECIAL | ElemDesc.ASPECIAL
                                    | ElemDesc.EMPTY
                                    | ElemDesc.WHITESPACESENSITIVE));
    m_elementFlags.put("OBJECT",
                       new ElemDesc(0 | ElemDesc.SPECIAL | ElemDesc.ASPECIAL
                                    | ElemDesc.HEADMISC
                                    | ElemDesc.WHITESPACESENSITIVE));
    m_elementFlags.put("PARAM", new ElemDesc(0 | ElemDesc.EMPTY));
    m_elementFlags.put("HR",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET
                                    | ElemDesc.EMPTY));
    m_elementFlags.put("P",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("H1",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("H2",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("H3",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("H4",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("H5",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("H6",
                       new ElemDesc(0 | ElemDesc.HEAD | ElemDesc.BLOCK));
    m_elementFlags.put("PRE",
                       new ElemDesc(0 | ElemDesc.PREFORMATTED
                                    | ElemDesc.BLOCK));
    m_elementFlags.put("Q",
                       new ElemDesc(0 | ElemDesc.SPECIAL
                                    | ElemDesc.ASPECIAL));
    m_elementFlags.put("BLOCKQUOTE",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("INS", new ElemDesc(0));
    m_elementFlags.put("DEL", new ElemDesc(0));
    m_elementFlags.put("DL",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("DT", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("DD", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("OL",
                       new ElemDesc(0 | ElemDesc.LIST | ElemDesc.BLOCK));
    m_elementFlags.put("UL",
                       new ElemDesc(0 | ElemDesc.LIST | ElemDesc.BLOCK));
    m_elementFlags.put("LI", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("FORM", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("LABEL", new ElemDesc(0 | ElemDesc.FORMCTRL));
    m_elementFlags.put("INPUT",
                       new ElemDesc(0 | ElemDesc.FORMCTRL
                                    | ElemDesc.INLINELABEL | ElemDesc.EMPTY));
    m_elementFlags.put("SELECT",
                       new ElemDesc(0 | ElemDesc.FORMCTRL
                                    | ElemDesc.INLINELABEL));
    m_elementFlags.put("OPTGROUP", new ElemDesc(0));
    m_elementFlags.put("OPTION", new ElemDesc(0));
    m_elementFlags.put("TEXTAREA",
                       new ElemDesc(0 | ElemDesc.FORMCTRL
                                    | ElemDesc.INLINELABEL));
    m_elementFlags.put("FIELDSET",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM));
    m_elementFlags.put("LEGEND", new ElemDesc(0));
    m_elementFlags.put("BUTTON",
                       new ElemDesc(0 | ElemDesc.FORMCTRL
                                    | ElemDesc.INLINELABEL));
    m_elementFlags.put("TABLE",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("CAPTION", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("THEAD", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("TFOOT", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("TBODY", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("COLGROUP", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("COL",
                       new ElemDesc(0 | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("TR", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("TH", new ElemDesc(0));
    m_elementFlags.put("TD", new ElemDesc(0));
    m_elementFlags.put("HEAD",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.HEADELEM));
    m_elementFlags.put("TITLE", new ElemDesc(0 | ElemDesc.BLOCK));
    m_elementFlags.put("BASE",
                       new ElemDesc(0 | ElemDesc.EMPTY | ElemDesc.BLOCK));
    m_elementFlags.put("META",
                       new ElemDesc(0 | ElemDesc.HEADMISC | ElemDesc.EMPTY
                                    | ElemDesc.BLOCK));
    m_elementFlags.put("STYLE",
                       new ElemDesc(0 | ElemDesc.HEADMISC | ElemDesc.RAW
                                    | ElemDesc.BLOCK));
    m_elementFlags.put("SCRIPT",
                       new ElemDesc(0 | ElemDesc.SPECIAL | ElemDesc.ASPECIAL
                                    | ElemDesc.HEADMISC | ElemDesc.RAW));
    m_elementFlags.put("NOSCRIPT",
                       new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                    | ElemDesc.BLOCKFORMFIELDSET));
    m_elementFlags.put("HTML", new ElemDesc(0 | ElemDesc.BLOCK));

    // From "John Ky" <[e-mail]
    // Transitional Document Type Definition ()
    // file:///C:/Documents%20and%20Settings/sboag.BOAG600E/My%20Documents/html/sgml/loosedtd.html#basefont
    m_elementFlags.put("FONT", new ElemDesc(0 | ElemDesc.FONTSTYLE));

    // file:///C:/Documents%20and%20Settings/sboag.BOAG600E/My%20Documents/html/present/graphics.html#edef-STRIKE
    m_elementFlags.put("S", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    m_elementFlags.put("STRIKE", new ElemDesc(0 | ElemDesc.FONTSTYLE));

    // file:///C:/Documents%20and%20Settings/sboag.BOAG600E/My%20Documents/html/present/graphics.html#edef-U
    m_elementFlags.put("U", new ElemDesc(0 | ElemDesc.FONTSTYLE));

    // From "John Ky" <[e-mail]
    m_elementFlags.put("NOBR", new ElemDesc(0 | ElemDesc.FONTSTYLE));
    
     // HTML 4.0, section 16.5
     m_elementFlags.put("IFRAME",
                                        new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                                                     | ElemDesc.BLOCKFORMFIELDSET));
     // NS4 extensions
     m_elementFlags.put("LAYER",
                                        new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                                                     | ElemDesc.BLOCKFORMFIELDSET));
     m_elementFlags.put("ILAYER",
                                        new ElemDesc(0 | ElemDesc.BLOCK | ElemDesc.BLOCKFORM
                                                                     | ElemDesc.BLOCKFORMFIELDSET));
  
    ElemDesc elemDesc;

    elemDesc = (ElemDesc) m_elementFlags.get("AREA");

    elemDesc.setAttr("HREF", ElemDesc.ATTRURL);
    elemDesc.setAttr("NOHREF", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("BASE");

    elemDesc.setAttr("HREF", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("BLOCKQUOTE");

    elemDesc.setAttr("CITE", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("Q");

    elemDesc.setAttr("CITE", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("INS");

    elemDesc.setAttr("CITE", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("DEL");

    elemDesc.setAttr("CITE", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("A");

    elemDesc.setAttr("HREF", ElemDesc.ATTRURL);
    elemDesc.setAttr("NAME", ElemDesc.ATTRURL);
    
    elemDesc = (ElemDesc) m_elementFlags.get("LINK");
    elemDesc.setAttr("HREF", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("INPUT");

    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
    elemDesc.setAttr("USEMAP", ElemDesc.ATTRURL);
    elemDesc.setAttr("CHECKED", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("ISMAP", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("READONLY", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("SELECT");

    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("MULTIPLE", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("OPTGROUP");

    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("OPTION");

    elemDesc.setAttr("SELECTED", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("TEXTAREA");

    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);
    elemDesc.setAttr("READONLY", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("BUTTON");

    elemDesc.setAttr("DISABLED", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("SCRIPT");

    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
    elemDesc.setAttr("FOR", ElemDesc.ATTRURL);
    elemDesc.setAttr("DEFER", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("IMG");

    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
    elemDesc.setAttr("LONGDESC", ElemDesc.ATTRURL);
    elemDesc.setAttr("USEMAP", ElemDesc.ATTRURL);
    elemDesc.setAttr("ISMAP", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("OBJECT");

    elemDesc.setAttr("CLASSID", ElemDesc.ATTRURL);
    elemDesc.setAttr("CODEBASE", ElemDesc.ATTRURL);
    elemDesc.setAttr("DATA", ElemDesc.ATTRURL);
    elemDesc.setAttr("ARCHIVE", ElemDesc.ATTRURL);
    elemDesc.setAttr("USEMAP", ElemDesc.ATTRURL);
    elemDesc.setAttr("DECLARE", ElemDesc.ATTREMPTY);

    elemDesc = (ElemDesc) m_elementFlags.get("FORM");

    elemDesc.setAttr("ACTION", ElemDesc.ATTRURL);

    elemDesc = (ElemDesc) m_elementFlags.get("HEAD");

    elemDesc.setAttr("PROFILE", ElemDesc.ATTRURL);

    // Attribution to: "Voytenko, Dimitry" <[e-mail]>
    elemDesc = (ElemDesc) m_elementFlags.get("FRAME");

    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
    elemDesc.setAttr("LONGDESC", ElemDesc.ATTRURL);
 
    // HTML 4.0, section 16.5
    elemDesc = (ElemDesc) m_elementFlags.get("IFRAME");
 
    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
    elemDesc.setAttr("LONGDESC", ElemDesc.ATTRURL);
 
    // NS4 extensions
    elemDesc = (ElemDesc) m_elementFlags.get("LAYER");
 
    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
 
    elemDesc = (ElemDesc) m_elementFlags.get("ILAYER");
 
    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
 
    elemDesc = (ElemDesc) m_elementFlags.get("DIV");

    elemDesc.setAttr("SRC", ElemDesc.ATTRURL);
  }

  /**
   * Dummy element for elements not found.
   */
  static private ElemDesc m_dummy = new ElemDesc(0 | ElemDesc.BLOCK);

  /** True if URLs should be specially escaped with the %xx form. */
  private boolean m_specialEscapeURLs = true;

  /** True if the META tag should be omitted. */
  private boolean m_omitMetaTag = false;

  /**
   * Tells if the formatter should use special URL escaping.
   *
   * @param bool True if URLs should be specially escaped with the %xx form.
   */
  public void setSpecialEscapeURLs(boolean bool)
  {
    m_specialEscapeURLs = bool;
  }

  /**
   * Tells if the formatter should omit the META tag.
   *
   * @param bool True if the META tag should be omitted.
   */
  public void setOmitMetaTag(boolean bool)
  {
    m_omitMetaTag = bool;
  }

  /**
   * Specifies an output format for this serializer. It the
   * serializer has already been associated with an output format,
   * it will switch to the new format. This method should not be
   * called while the serializer is in the process of serializing