gomp-20050608-branch/libjava/classpath/gnu/xml/dom/DomText.java

   1 /* DomText.java --
   2    Copyright (C) 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.xml.dom;
  39
  40 import org.w3c.dom.DOMException;
  41 import org.w3c.dom.Text;
  42
  43 /**
  44  * <p> "Text" implementation.  </p>
  45  *
  46  * @author David Brownell
  47  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  48  */
  49 public class DomText
  50   extends DomCharacterData
  51   implements Text
  52 {
  53
  54   // NOTE:  deleted unused per-instance "isIgnorable"
  55   // support to reclaim its space.
  56
  57   /**
  58    * Constructs a text node associated with the specified
  59    * document and holding the specified data.
  60    *
  61    * <p>This constructor should only be invoked by a Document object
  62    * as part of its createTextNode functionality, or through a subclass
  63    * which is similarly used in a "Sub-DOM" style layer.
  64    */
  65   protected DomText(DomDocument owner, String value)
  66   {
  67     super(TEXT_NODE, owner, value);
  68   }
  69
  70   protected DomText(DomDocument owner, char[] buf, int off, int len)
  71   {
  72     super(TEXT_NODE, owner, buf, off, len);
  73   }
  74
  75   // Used by DomCDATA
  76   DomText(short nodeType, DomDocument owner, String value)
  77   {
  78     super(nodeType, owner, value);
  79   }
  80
  81   DomText(short nodeType, DomDocument owner, char[] buf, int off, int len)
  82   {
  83     super(nodeType, owner, buf, off, len);
  84   }
  85
  86   /**
  87    * <b>DOM L1</b>
  88    * Returns the string "#text".
  89    */
  90   // can't be 'final' with CDATA subclassing
  91   public String getNodeName()
  92   {
  93     return "#text";
  94   }
  95
  96   /**
  97    * <b>DOM L1</b>
  98    * Splits this text node in two parts at the offset, returning
  99    * the new text node (the sibling with the second part).
 100    */
 101   public Text splitText(int offset)
 102   {
 103     if (isReadonly())
 104       {
 105         throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
 106       }
 107     try
 108       {
 109         String text = getNodeValue();
 110         String before = text.substring(0, offset);
 111         String after = text.substring(offset);
 112         Text next;
 113
 114         if (getNodeType() == TEXT_NODE)
 115           {
 116             next = owner.createTextNode(after);
 117           }
 118         else // CDATA_SECTION_NODE
 119           {
 120             next = owner.createCDATASection(after);
 121           }
 122
 123         if (this.next != null)
 124           {
 125             parent.insertBefore(next, this.next);
 126           }
 127         else
 128           {
 129             parent.appendChild(next);
 130           }
 131         setNodeValue(before);
 132         return next;
 133
 134       }
 135     catch (IndexOutOfBoundsException x)
 136       {
 137         throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
 138       }
 139   }
 140
 141   // DOM Level 3
 142
 143   public boolean isElementContentWhitespace()
 144   {
 145     if (parent != null)
 146       {
 147         DomDoctype doctype = (DomDoctype) owner.getDoctype();
 148         if (doctype != null)
 149           {
 150             DTDElementTypeInfo info =
 151               doctype.getElementTypeInfo(parent.getNodeName());
 152             if (info != null)
 153               {
 154                 if (info.model == null && info.model.indexOf("#PCDATA") != -1)
 155                   {
 156                     return false;
 157                   }
 158                 return getNodeValue().trim().length() == 0;
 159               }
 160           }
 161       }
 162     return false;
 163   }
 164
 165   public String getWholeText()
 166   {
 167     DomNode ref = this;
 168     DomNode ctx;
 169     for (ctx = previous; ctx != null &&
 170          (ctx.nodeType == TEXT_NODE || ctx.nodeType == CDATA_SECTION_NODE);
 171          ctx = ctx.previous)
 172       {
 173         ref = ctx;
 174       }
 175     StringBuffer buf = new StringBuffer(ref.getNodeValue());
 176     for (ctx = ref.next; ctx != null &&
 177          (ctx.nodeType == TEXT_NODE || ctx.nodeType == CDATA_SECTION_NODE);
 178          ctx = ctx.next)
 179       {
 180         buf.append(ctx.getNodeValue());
 181       }
 182     return buf.toString ();
 183   }
 184
 185   public Text replaceWholeText(String content)
 186     throws DOMException
 187   {
 188     boolean isEmpty = (content == null || content.length () == 0);
 189     if (!isEmpty)
 190       {
 191         setNodeValue(content);
 192       }
 193
 194     DomNode ref = this;
 195     DomNode ctx;
 196     for (ctx = previous; ctx != null &&
 197          (ctx.nodeType == TEXT_NODE || ctx.nodeType == CDATA_SECTION_NODE);
 198          ctx = ctx.previous)
 199       {
 200         ref = ctx;
 201       }
 202     ctx = ref.next;
 203     if ((isEmpty || ref != this) && parent != null)
 204       {
 205         parent.removeChild(ref);
 206       }
 207     for (; ctx != null &&
 208          (ctx.nodeType == TEXT_NODE || ctx.nodeType == CDATA_SECTION_NODE);
 209          ctx = ref)
 210       {
 211         ref = ctx.next;
 212         if ((isEmpty || ctx != this) && parent != null)
 213           {
 214             parent.removeChild(ctx);
 215           }
 216       }
 217     return (isEmpty) ? null : this;
 218   }
 219
 220 }