X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b1d4dd7add411ebff1ce4a8d1d992e0e43ee26b1..fcdd53359135f790b85728c4254b97095a56dad8:/src/common/cmdproc.cpp

diff --git a/src/common/cmdproc.cpp b/src/common/cmdproc.cpp
index 4945bdbe28..259d3e0ff7 100644
--- a/src/common/cmdproc.cpp
+++ b/src/common/cmdproc.cpp
@@ -5,7 +5,7 @@
 // Modified by:
 // Created:     05.11.00
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWindows team
+// Copyright:   (c) wxWidgets team
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
-    #pragma implementation "cmdproc.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -53,10 +49,6 @@ wxCommand::wxCommand(bool canUndoIt, const wxString& name)
     m_commandName = name;
 }
 
-wxCommand::~wxCommand()
-{
-}
-
 // ----------------------------------------------------------------------------
 // Command processor
 // ----------------------------------------------------------------------------
@@ -64,12 +56,14 @@ wxCommand::~wxCommand()
 wxCommandProcessor::wxCommandProcessor(int maxCommands)
 {
     m_maxNoCommands = maxCommands;
-    m_currentCommand = (wxNode *) NULL;
 #if wxUSE_MENUS
     m_commandEditMenu = (wxMenu *) NULL;
 #endif // wxUSE_MENUS
     m_undoAccelerator = wxT("\tCtrl+Z");
     m_redoAccelerator = wxT("\tCtrl+Y");
+
+    m_lastSavedCommand =
+    m_currentCommand = wxList::compatibility_iterator();
 }
 
 wxCommandProcessor::~wxCommandProcessor()
@@ -89,23 +83,25 @@ bool wxCommandProcessor::UndoCommand(wxCommand& cmd)
 
 // Pass a command to the processor. The processor calls Do();
 // if successful, is appended to the command history unless
-// storeIt is FALSE.
+// storeIt is false.
 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
 {
-    wxCHECK_MSG( command, FALSE, _T("no command in wxCommandProcessor::Submit") );
+    wxCHECK_MSG( command, false, _T("no command in wxCommandProcessor::Submit") );
 
     if ( !DoCommand(*command) )
     {
         // the user code expects the command to be deleted anyhow
         delete command;
 
-        return FALSE;
+        return false;
     }
 
     if ( storeIt )
         Store(command);
+    else
+        delete command;
 
-    return TRUE;
+    return true;
 }
 
 void wxCommandProcessor::Store(wxCommand *command)
@@ -114,10 +110,14 @@ void wxCommandProcessor::Store(wxCommand *command)
 
     if ( (int)m_commands.GetCount() == m_maxNoCommands )
     {
-        wxNode *firstNode = m_commands.GetFirst();
+        wxList::compatibility_iterator firstNode = m_commands.GetFirst();
         wxCommand *firstCommand = (wxCommand *)firstNode->GetData();
         delete firstCommand;
-        delete firstNode;
+        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'
@@ -126,12 +126,17 @@ void wxCommandProcessor::Store(wxCommand *command)
         ClearCommands();
     else
     {
-        wxNode *node = m_currentCommand->GetNext();
+        wxList::compatibility_iterator node = m_currentCommand->GetNext();
         while (node)
         {
-            wxNode *next = node->GetNext();
+            wxList::compatibility_iterator next = node->GetNext();
             delete (wxCommand *)node->GetData();
-            delete node;
+            m_commands.Erase(node);
+
+            // Make sure m_lastSavedCommand won't point to freed memory
+            if ( m_lastSavedCommand == node )
+                m_lastSavedCommand = wxList::compatibility_iterator();
+
             node = next;
         }
     }
@@ -150,17 +155,21 @@ bool wxCommandProcessor::Undo()
         {
             m_currentCommand = m_currentCommand->GetPrevious();
             SetMenuStrings();
-            return TRUE;
+            return true;
         }
     }
 
-    return FALSE;
+    return false;
 }
 
 bool wxCommandProcessor::Redo()
 {
     wxCommand *redoCommand = (wxCommand *) NULL;
-    wxNode *redoNode = (wxNode *) NULL;
+    wxList::compatibility_iterator redoNode
+#if !wxUSE_STL
+        = NULL          // just to avoid warnings
+#endif // !wxUSE_STL
+        ;
 
     if ( m_currentCommand )
     {
@@ -187,10 +196,10 @@ bool wxCommandProcessor::Redo()
         {
             m_currentCommand = redoNode;
             SetMenuStrings();
-            return TRUE;
+            return true;
         }
     }
-    return FALSE;
+    return false;
 }
 
 bool wxCommandProcessor::CanUndo() const
@@ -202,16 +211,16 @@ bool wxCommandProcessor::CanUndo() const
 
 bool wxCommandProcessor::CanRedo() const
 {
-    if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->GetNext() == (wxNode*) NULL))
-        return FALSE;
+    if (m_currentCommand && !m_currentCommand->GetNext())
+        return false;
 
-    if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->GetNext() != (wxNode*) NULL))
-        return TRUE;
+    if (m_currentCommand && m_currentCommand->GetNext())
+        return true;
 
-    if ((m_currentCommand == (wxNode*) NULL) && (m_commands.GetCount() > 0))
-        return TRUE;
+    if (!m_currentCommand && (m_commands.GetCount() > 0))
+        return true;
 
-    return FALSE;
+    return false;
 }
 
 void wxCommandProcessor::Initialize()
@@ -227,7 +236,7 @@ void wxCommandProcessor::SetMenuStrings()
     {
         wxString undoLabel = GetUndoMenuLabel();
         wxString redoLabel = GetRedoMenuLabel();
-        
+
         m_commandEditMenu->SetLabel(wxID_UNDO, undoLabel);
         m_commandEditMenu->Enable(wxID_UNDO, CanUndo());
 
@@ -245,7 +254,7 @@ wxString wxCommandProcessor::GetUndoMenuLabel() const
     {
         wxCommand *command = (wxCommand *)m_currentCommand->GetData();
         wxString commandName(command->GetName());
-        if (commandName == wxT("")) commandName = _("Unnamed command");
+        if (commandName.empty()) commandName = _("Unnamed command");
         bool canUndo = command->CanUndo();
         if (canUndo)
             buf = wxString(_("&Undo ")) + commandName + m_undoAccelerator;
@@ -256,7 +265,7 @@ wxString wxCommandProcessor::GetUndoMenuLabel() const
     {
         buf = _("&Undo") + m_undoAccelerator;
     }
-    
+
     return buf;
 }
 
@@ -271,7 +280,7 @@ wxString wxCommandProcessor::GetRedoMenuLabel() const
         {
             wxCommand *redoCommand = (wxCommand *)m_currentCommand->GetNext()->GetData();
             wxString redoCommandName(redoCommand->GetName());
-            if (redoCommandName == wxT("")) redoCommandName = _("Unnamed command");
+            if (redoCommandName.empty()) redoCommandName = _("Unnamed command");
             buf = wxString(_("&Redo ")) + redoCommandName + m_redoAccelerator;
         }
         else
@@ -291,7 +300,7 @@ wxString wxCommandProcessor::GetRedoMenuLabel() const
             // we've undone to the start of the list, but can redo the first.
             wxCommand *redoCommand = (wxCommand *)m_commands.GetFirst()->GetData();
             wxString redoCommandName(redoCommand->GetName());
-            if (redoCommandName == wxT("")) redoCommandName = _("Unnamed command");
+            if (redoCommandName.empty()) redoCommandName = _("Unnamed command");
             buf = wxString(_("&Redo ")) + redoCommandName + m_redoAccelerator;
         }
     }
@@ -300,15 +309,17 @@ wxString wxCommandProcessor::GetRedoMenuLabel() const
 
 void wxCommandProcessor::ClearCommands()
 {
-    wxNode *node = m_commands.GetFirst();
+    wxList::compatibility_iterator node = m_commands.GetFirst();
     while (node)
     {
         wxCommand *command = (wxCommand *)node->GetData();
         delete command;
-        delete node;
+        m_commands.Erase(node);
         node = m_commands.GetFirst();
     }
-    m_currentCommand = (wxNode *) NULL;
+
+    m_currentCommand = wxList::compatibility_iterator();
+    m_lastSavedCommand = wxList::compatibility_iterator();
 }