X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d98c269bb4f58f400208a61635cceddece8c6b4e..cc4d5638c66a409e421420ed7110917755a66788:/src/common/cmdproc.cpp

diff --git a/src/common/cmdproc.cpp b/src/common/cmdproc.cpp
index 789e950f95..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
 ///////////////////////////////////////////////////////////////////////////////
@@ -112,18 +111,6 @@ void wxCommandProcessor::Store(wxCommand *command)
 {
     wxCHECK_RET( command, wxT("no command in wxCommandProcessor::Store") );
 
-    if ( (int)m_commands.GetCount() == m_maxNoCommands )
-    {
-        wxList::compatibility_iterator firstNode = m_commands.GetFirst();
-        wxCommand *firstCommand = (wxCommand *)firstNode->GetData();
-        delete firstCommand;
-        m_commands.Erase(firstNode);
-
-        // Make sure m_lastSavedCommand won't point to freed memory
-        if ( m_lastSavedCommand == firstNode )
-            m_lastSavedCommand = wxList::compatibility_iterator();
-    }
-
     // Correct a bug: we must chop off the current 'branch'
     // so that we're at the end of the command list.
     if (!m_currentCommand)
@@ -134,17 +121,31 @@ void wxCommandProcessor::Store(wxCommand *command)
         while (node)
         {
             wxList::compatibility_iterator next = node->GetNext();
-            delete (wxCommand *)node->GetData();
-            m_commands.Erase(node);
 
             // Make sure m_lastSavedCommand won't point to freed memory
-            if ( m_lastSavedCommand == node )
+            if ( m_lastSavedCommand && m_lastSavedCommand == node )
                 m_lastSavedCommand = wxList::compatibility_iterator();
 
+            delete (wxCommand *)node->GetData();
+            m_commands.Erase(node);
+
             node = next;
         }
     }
 
+    if ( (int)m_commands.GetCount() == m_maxNoCommands )
+    {
+        wxList::compatibility_iterator firstNode = m_commands.GetFirst();
+
+        // Make sure m_lastSavedCommand won't point to freed memory
+        if ( m_lastSavedCommand && m_lastSavedCommand == firstNode )
+            m_lastSavedCommand = wxList::compatibility_iterator();
+
+        wxCommand *firstCommand = (wxCommand *)firstNode->GetData();
+        delete firstCommand;
+        m_commands.Erase(firstNode);
+    }
+
     m_commands.Append(command);
     m_currentCommand = m_commands.GetLast();
     SetMenuStrings();
@@ -170,9 +171,9 @@ bool wxCommandProcessor::Redo()
 {
     wxCommand *redoCommand = NULL;
     wxList::compatibility_iterator redoNode
-#if !wxUSE_STL
+#if !wxUSE_STD_CONTAINERS
         = NULL          // just to avoid warnings
-#endif // !wxUSE_STL
+#endif // !wxUSE_STD_CONTAINERS
         ;
 
     if ( m_currentCommand )
@@ -326,4 +327,28 @@ void wxCommandProcessor::ClearCommands()
     m_lastSavedCommand = wxList::compatibility_iterator();
 }
 
+bool wxCommandProcessor::IsDirty() const
+{
+    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;
+    }
+
+    // Finally if both iterators are valid, we may just compare them.
+    return m_currentCommand != m_lastSavedCommand;
+}