X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ef20428e992975d27f38c8eeefa0f4c5006e7589..cb41a69b152026d6c586d21148e34913291cd733:/src/common/cmdproc.cpp

diff --git a/src/common/cmdproc.cpp b/src/common/cmdproc.cpp
index ed7efb3e3f..54f14ea028 100644
--- a/src/common/cmdproc.cpp
+++ b/src/common/cmdproc.cpp
@@ -4,7 +4,6 @@
 // Author:      Julian Smart (extracted from docview.h by VZ)
 // Modified by:
 // Created:     05.11.00
-// RCS-ID:      $Id$
 // Copyright:   (c) wxWidgets team
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
@@ -330,12 +329,26 @@ void wxCommandProcessor::ClearCommands()
 
 bool wxCommandProcessor::IsDirty() const
 {
-    if ( !m_currentCommand )
+    if ( m_commands.empty() )
+    {
+        // If we have never been modified, we can't be dirty.
         return false;
+    }
 
     if ( !m_lastSavedCommand )
+    {
+        // If we have been modified but have never been saved, we're dirty.
+        return true;
+    }
+
+    if ( !m_currentCommand )
+    {
+        // This only happens if all commands were undone after saving the
+        // document: we're dirty then.
         return true;
+    }
 
-    return m_lastSavedCommand != m_currentCommand;
+    // Finally if both iterators are valid, we may just compare them.
+    return m_currentCommand != m_lastSavedCommand;
 }