code: /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xml.utils;
  
  import java.util.Hashtable;
  
  /**
   * This class is in support of SerializerToHTML, and acts as a sort
   * of element representative for HTML elements.
   * @xsl.usage internal
   */
  class ElemDesc
  {
  
    /** Table of attributes for the element */
    Hashtable m_attrs = null;
  
    /** Element's flags, describing the role this element plays during
     * formatting of the document. This is used as a bitvector; more than one flag
     * may be set at a time, bitwise-ORed together. Mnemonic and bits
     * have been assigned to the flag values. NOTE: Some bits are
     * currently assigned multiple mnemonics; it is the caller's
     * responsibility to disambiguate these if necessary. */
    int m_flags;
  
    /** Defines mnemonic and bit-value for the EMPTY flag */
    static final int EMPTY = (1 << 1);
  
    /** Defines mnemonic and bit-value for the FLOW flag  */
    static final int FLOW = (1 << 2);
  
    /** Defines mnemonic and bit-value for the BLOCK flag          */
    static final int BLOCK = (1 << 3);
  
    /** Defines mnemonic and bit-value for the BLOCKFORM  flag         */
    static final int BLOCKFORM = (1 << 4);
  
    /** Defines mnemonic and bit-value for the BLOCKFORMFIELDSET flag          */
    static final int BLOCKFORMFIELDSET = (1 << 5);
  
    /** Defines mnemonic and bit-value for the CDATA flag         */
    static final int CDATA = (1 << 6);
  
    /** Defines mnemonic and bit-value for the PCDATA flag          */
    static final int PCDATA = (1 << 7);
  
    /** Defines mnemonic and bit-value for the RAW flag         */
    static final int RAW = (1 << 8);
  
    /** Defines mnemonic and bit-value for the INLINE flag          */
    static final int INLINE = (1 << 9);
  
    /** Defines mnemonic and bit-value for the INLINEA flag          */
    static final int INLINEA = (1 << 10);
  
    /** Defines mnemonic and bit-value for the INLINELABEL flag          */
    static final int INLINELABEL = (1 << 11);
  
    /** Defines mnemonic and bit-value for the FONTSTYLE flag          */
    static final int FONTSTYLE = (1 << 12);
  
    /** Defines mnemonic and bit-value for the PHRASE flag          */
    static final int PHRASE = (1 << 13);
  
    /** Defines mnemonic and bit-value for the FORMCTRL flag         */
    static final int FORMCTRL = (1 << 14);
  
    /** Defines mnemonic and bit-value for the SPECIAL flag         */
    static final int SPECIAL = (1 << 15);
  
    /** Defines mnemonic and bit-value for the ASPECIAL flag         */
    static final int ASPECIAL = (1 << 16);
  
    /** Defines mnemonic and bit-value for the HEADMISC flag         */
    static final int HEADMISC = (1 << 17);
  
    /** Defines mnemonic and bit-value for the HEAD flag         */
    static final int HEAD = (1 << 18);
  
    /** Defines mnemonic and bit-value for the LIST flag         */
    static final int LIST = (1 << 19);
  
    /** Defines mnemonic and bit-value for the PREFORMATTED flag         */
    static final int PREFORMATTED = (1 << 20);
  
    /** Defines mnemonic and bit-value for the WHITESPACESENSITIVE flag         */
    static final int WHITESPACESENSITIVE = (1 << 21);
  
    /** Defines mnemonic and bit-value for the ATTRURL flag         */
    static final int ATTRURL = (1 << 1);
  
    /** Defines mnemonic and bit-value for the ATTREMPTY flag         */
    static final int ATTREMPTY = (1 << 2);
  
    /**
     * Construct an ElementDescription with an initial set of flags.
     *
     * @param flags Element flags
     * @see m_flags
     */
    ElemDesc(int flags)
    {
      m_flags = flags;
    }
  
    /**
     * "is (this element described by these flags)".
     * 
     * This might more properly be called areFlagsSet(). It accepts an
     * integer (being used as a bitvector) and checks whether all the 
     * corresponding bits are set in our internal flags. Note that this
     * test is performed as a bitwise AND, not an equality test, so a
     * 0 bit in the input means "don't test", not "must be set false".
     *
     * @param flags Vector of flags to compare against this element's flags
     *
     * @return true if the flags set in the parameter are also set in the
     * element's stored flags.
     * 
     * @see m_flags
     * @see isAttrFlagSet
     */
    boolean is(int flags)
    {
      // int which = (m_flags & flags);
      return (m_flags & flags) != 0;
    }
  
    /**
     * Set a new attribute for this element 
     *
     *
     * @param name Attribute name
     * @param flags Attibute flags
     */
    void setAttr(String name, int flags)
    {
  
      if (null == m_attrs)
        m_attrs = new Hashtable();
  
      m_attrs.put(name, new Integer(flags));
    }
  
    /**
     * Find out if a flag is set in a given attribute of this element 
     *
     *
     * @param name Attribute name
     * @param flags Flag to check
     *
     * @return True if the flag is set in the attribute. Returns false
     * if the attribute is not found 
     * @see m_flags
     */
    boolean isAttrFlagSet(String name, int flags)
    {
  
      if (null != m_attrs)
      {
        Integer _flags = (Integer) m_attrs.get(name);
  
        if (null != _flags)
        {
          return (_flags.intValue() & flags) != 0;
        }
      }
  
      return false;
    }
  }
  