2005-07-16 02:30:23 +02:00
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/* DomCharacterData.java --
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2006-03-10 22:46:48 +01:00
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Copyright (C) 1999,2000,2001,2004,2006 Free Software Foundation, Inc.
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2005-07-16 02:30:23 +02:00
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.dom;
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import org.w3c.dom.CharacterData;
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import org.w3c.dom.DOMException;
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2006-03-10 22:46:48 +01:00
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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2005-07-16 02:30:23 +02:00
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import org.w3c.dom.events.MutationEvent;
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/**
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* <p> Abstract "CharacterData" implementation. This
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* facilitates reusing code in classes implementing subtypes of that DOM
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* interface (Text, Comment, CDATASection). </p>
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*
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* @author David Brownell
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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*/
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public abstract class DomCharacterData
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extends DomNode
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implements CharacterData
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{
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2006-03-10 22:46:48 +01:00
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/**
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* Empty node list representing the children of character data nodes.
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*/
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static class EmptyNodeList
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implements NodeList
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{
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public int getLength()
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{
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return 0;
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}
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public Node item(int index)
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{
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return null;
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}
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}
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/**
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* Singleton empty node list for character data nodes.
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*/
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static final NodeList CHILD_NODES = new EmptyNodeList();
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2005-07-16 02:30:23 +02:00
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private String text;
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// package private
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DomCharacterData(short nodeType, DomDocument doc, String value)
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{
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super(nodeType, doc);
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text = (value == null) ? "" : value;
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}
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// package private
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DomCharacterData(short nodeType, DomDocument doc,
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char[] buf, int offset, int length)
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{
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super(nodeType, doc);
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text = (buf == null) ? "" : new String(buf, offset, length);
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}
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/**
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* <b>DOM L1</b>
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* Appends the specified data to the value of this node.
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* Causes a DOMCharacterDataModified mutation event to be reported.
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*/
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public void appendData(String arg)
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{
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if (isReadonly())
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{
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throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
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}
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String value = text + arg;
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mutating(value);
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text = value;
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}
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/**
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* <b>DOM L1</b>
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* Modifies the value of this node.
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* Causes a DOMCharacterDataModified mutation event to be reported.
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*/
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public void deleteData(int offset, int count)
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{
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if (isReadonly())
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{
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throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
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}
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char[] raw = text.toCharArray();
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if (offset < 0 || count < 0 || offset > raw.length)
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{
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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if ((offset + count) > raw.length)
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{
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count = raw.length - offset;
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}
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if (count == 0)
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{
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return;
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}
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try
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{
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char[] buf = new char[raw.length - count];
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System.arraycopy(raw, 0, buf, 0, offset);
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System.arraycopy(raw, offset + count, buf, offset,
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raw.length - (offset + count));
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String value = new String(buf);
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mutating(value);
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text = value;
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}
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catch (IndexOutOfBoundsException x)
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{
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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}
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/**
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* <b>DOM L1</b>
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* Returns the value of this node.
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*/
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public String getNodeValue()
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{
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return text;
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}
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/**
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* <b>DOM L1</b>
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* Returns the value of this node; same as getNodeValue.
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*/
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public final String getData()
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{
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return text;
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}
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/**
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* <b>DOM L1</b>
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* Returns the length of the data.
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*/
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public int getLength()
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{
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return text.length();
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}
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/**
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* <b>DOM L1</b>
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* Modifies the value of this node.
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*/
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public void insertData(int offset, String arg)
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{
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if (isReadonly())
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{
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throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
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}
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char[] raw = text.toCharArray();
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char[] tmp = arg.toCharArray ();
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char[] buf = new char[raw.length + tmp.length];
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try
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{
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System.arraycopy(raw, 0, buf, 0, offset);
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System.arraycopy(tmp, 0, buf, offset, tmp.length);
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System.arraycopy(raw, offset, buf, offset + tmp.length,
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raw.length - offset);
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String value = new String(buf);
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mutating(value);
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text = value;
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}
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catch (IndexOutOfBoundsException x)
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{
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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}
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/**
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* <b>DOM L1</b>
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* Modifies the value of this node. Causes DOMCharacterDataModified
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* mutation events to be reported (at least one).
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*/
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public void replaceData(int offset, int count, String arg)
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{
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if (readonly)
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{
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throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
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}
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char[] raw = text.toCharArray();
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// deleteData
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if (offset < 0 || count < 0 || offset > raw.length)
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{
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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if ((offset + count) > raw.length)
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{
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count = raw.length - offset;
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}
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try
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{
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char[] buf = new char[raw.length - count];
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System.arraycopy(raw, 0, buf, 0, offset);
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System.arraycopy(raw, offset + count, buf, offset,
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raw.length - (offset + count));
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// insertData
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char[] tmp = arg.toCharArray ();
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char[] buf2 = new char[buf.length + tmp.length];
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System.arraycopy(raw, 0, buf, 0, offset);
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System.arraycopy(tmp, 0, buf, offset, tmp.length);
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System.arraycopy(raw, offset, buf, offset + tmp.length,
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raw.length - offset);
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String value = new String(buf);
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mutating(value);
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text = value;
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}
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catch (IndexOutOfBoundsException x)
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{
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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}
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/**
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* <b>DOM L1</b>
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* Assigns the value of this node.
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* Causes a DOMCharacterDataModified mutation event to be reported.
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*/
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public void setNodeValue(String value)
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{
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if (isReadonly())
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{
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throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
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}
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if (value == null)
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{
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value = "";
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}
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mutating(value);
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text = value;
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}
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/**
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* <b>DOM L1</b>
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* Assigns the value of this node; same as setNodeValue.
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*/
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final public void setData(String data)
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{
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setNodeValue(data);
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}
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/**
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* <b>DOM L1</b>
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* Returns the specified substring.
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*/
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public String substringData(int offset, int count)
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{
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try
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{
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return text.substring(offset, count);
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}
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catch (StringIndexOutOfBoundsException e)
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{
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if (offset >= 0 && count >= 0 && offset < text.length())
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{
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return text.substring(offset);
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}
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throw new DomDOMException(DOMException.INDEX_SIZE_ERR);
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}
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}
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2006-03-10 22:46:48 +01:00
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/**
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* Returns an empty node list.
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* Character data nodes do not have children.
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*/
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public NodeList getChildNodes()
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{
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return CHILD_NODES;
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}
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2005-07-16 02:30:23 +02:00
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/**
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* The base URI for character data is <code>null</code>.
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* @since DOM Level 3 Core
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*/
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public final String getBaseURI()
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{
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return null;
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}
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private void mutating(String newValue)
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{
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if (!reportMutations)
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{
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return;
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}
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// EVENT: DOMCharacterDataModified, target = this,
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// prev/new values provided
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MutationEvent event;
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event = (MutationEvent) createEvent("MutationEvents");
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event.initMutationEvent("DOMCharacterDataModified",
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true /* bubbles */, false /* nocancel */,
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null, text, newValue, null, (short) 0);
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dispatchEvent(event);
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}
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}
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