Improve file handling

[inkscape.git] / src / bind / java / org / inkscape / script / Editor.java

diff --git a/src/bind/java/org/inkscape/script/Editor.java b/src/bind/java/org/inkscape/script/Editor.java
index ba57465ca27e9cd033e94d08a880df0701a3758f..ac1c49aaf0f0b8346ade4ec3f6976733d6495de3 100644 (file)
--- a/src/bind/java/org/inkscape/script/Editor.java
+++ b/src/bind/java/org/inkscape/script/Editor.java
@@ -1,3 +1,27 @@
+/**
+ * This is a simple mechanism to bind Inkscape to Java, and thence
+ * to all of the nice things that can be layered upon that.
+ *
+ * Authors:
+ *   Bob Jamison
+ *
+ * Copyright (C) 2007-2008 Bob Jamison
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 3 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
 package org.inkscape.script;
 
 
@@ -5,17 +29,38 @@ package org.inkscape.script;
 import javax.swing.JPanel;
 import javax.swing.JTextPane;
 import java.awt.BorderLayout;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
 
 /**
  * A simple script editor for quick fixes.
  */
 public class Editor extends JPanel
 {
+ScriptConsole parent;
 JTextPane textPane;
 
+//########################################################################
+//# MESSSAGES
+//########################################################################
+void err(String fmt, Object... arguments)
+{
+    parent.err("Editor err:" + fmt, arguments);
+}
+
+void msg(String fmt, Object... arguments)
+{
+    parent.msg("Editor:" + fmt, arguments);
+}
+
+void trace(String fmt, Object... arguments)
+{
+    parent.trace("Editor:" + fmt, arguments);
+}
 
 /**
- *
+ * Returns the current text contained in this editor
  */
 public String getText()
 {
@@ -23,21 +68,68 @@ public String getText()
 }
 
 
+String lastHash = null;
+
 /**
- *
+ *  Sets the text of this editor
  */
 public void setText(String txt)
 {
     textPane.setText(txt);
+    lastHash = getHash(txt);
+    trace("hash:" + lastHash);
+}
+
+MessageDigest md = null;
+
+final String hex = "0123456789abcdef";
+
+String toHex(byte arr[])
+{
+    StringBuffer buf = new StringBuffer();
+    for (byte b : arr)
+        {
+        buf.append(hex.charAt((b>>4) & 15));
+        buf.append(hex.charAt((b   ) & 15));
+               }
+       return buf.toString();
+}
+
+String getHash(String text)
+{
+    if (md == null)
+        {
+        try
+            {
+            md = MessageDigest.getInstance("MD5");
+                       }
+               catch (NoSuchAlgorithmException e)
+                   {
+                   err("getHash: " + e);
+                       return "";
+                       }
+               }
+    byte hash[] = md.digest(text.getBytes());
+    return toHex(hash);
+}
+
+public boolean isDirty()
+{
+    String txt = getText();
+    String hash = getHash(txt);
+    if (lastHash != null && !lastHash.equals(hash))
+        return true;
+    return false;
 }
 
 
 /**
  *
  */
-public Editor()
+public Editor(ScriptConsole par)
 {
     super();
+    parent = par;
     setLayout(new BorderLayout());
     textPane = new JTextPane();
     add(textPane, BorderLayout.CENTER);