[Jsxe-cvs] SF.net SVN: jsxe: [1123] trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java

[<ian...@us...>]

Revision: 1123
Author:   ian_lewis
Date:     2006-08-08 13:15:25 -0700 (Tue, 08 Aug 2006)
ViewCVS:  http://svn.sourceforge.net/jsxe/?rev=1123&view=rev

Log Message:
-----------
Added undo/redo support for attributes

Added Paths:
-----------
    trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java
Added: trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java
===================================================================
--- trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java	                        (rev 0)
+++ trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java	2006-08-08 20:15:25 UTC (rev 1123)
@@ -0,0 +1,106 @@
+/*
+AttributeChange.java
+:tabSize=4:indentSize=4:noTabs=true:
+:folding=explicit:collapseFolds=1:
+
+Copyright (C) 2006 Ian Lewis (Ian...@me...)
+
+This program 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
+of the License, or (at your option) any later version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+Optionally, you may find a copy of the GNU General Public License
+from http://www.fsf.org/copyleft/gpl.txt
+*/
+
+package net.sourceforge.jsxe.dom.undo;
+
+//{{{ imports
+
+//{{{ jsXe classes
+import net.sourceforge.jsxe.dom.AdapterNode;
+//}}}
+
+//{{{ Swing classes
+import javax.swing.undo.*;
+//}}}
+
+//{{{ DOM classes
+import org.w3c.dom.DOMException;
+//}}}
+
+//}}}
+
+/**
+ * An undoable edit sigifying a change to an attribute into an element 
+ * AdapterNode..
+ *
+ * @author Ian Lewis (<a href="mailto:Ian...@me...">Ian...@me...</a>)
+ * @version $Id$
+ * @see net.sourceforge.jsxe.dom.XMLDocument
+ * @see net.sourceforge.jsxe.dom.AdapterNode
+ */
+public class AttributeChange extends AbstractUndoableEdit {
+    
+    private AdapterNode m_node;
+    private String m_name;
+    private String m_oldValue;
+    private String m_newValue;
+    
+    //{{{ AttributeChange constructor
+    /**
+     * @param name The qualified name of the attribute.
+     * @param oldValue The old value of the attribute. If null then the attribute was added.
+     * @param newValue The new value of the attribute. If null then the attribute was removed
+     */
+    public AttributeChange(AdapterNode node, String name, String oldValue, String newValue) {
+        m_node = node;
+        m_name = name;
+        m_oldValue = oldValue;
+        m_newValue = newValue;
+    }//}}}
+    
+    //{{{ undo()
+    
+    public void undo() throws CannotUndoException {
+        super.undo();
+        try {
+            if (m_oldValue != null) {
+                m_node.setAttribute(m_name, m_oldValue);
+            } else {
+                //if the old value is null then the attribute was added.
+                //we need to remove it here.
+                m_node.removeAttribute(m_name);
+            }
+        } catch (DOMException e) {
+            throw new CannotUndoException();
+        }
+    }//}}}
+    
+    //{{{ redo()
+    
+    public void redo() throws CannotRedoException {
+        super.redo();
+        try {
+            if (m_newValue != null) {
+                m_node.setAttribute(m_name, m_newValue);
+            } else {
+                //if the new value is null then the attribute was removed
+                //we need to remove it here.
+                m_node.removeAttribute(m_name);
+            }
+        } catch (DOMException e) {
+            throw new CannotRedoException();
+        }
+    }//}}}
+    
+}
\ No newline at end of file


Property changes on: trunk/jsxe/src/net/sourceforge/jsxe/dom/undo/AttributeChange.java
___________________________________________________________________
Name: svn:executable
   + *


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