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