Added support for reading image resolutions from PNG images.

[wxWidgets.git] / src / common / cmdproc.cpp

diff --git a/src/common/cmdproc.cpp b/src/common/cmdproc.cpp
index 320084dcce81a8c7de9e3fad425fad9cfbb642ee..cb0d3930492d76aab84dcfe90402aad227bdf875 100644 (file)
--- a/src/common/cmdproc.cpp
+++ b/src/common/cmdproc.cpp
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "cmdproc.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -32,6 +28,7 @@
     #include "wx/intl.h"
     #include "wx/string.h"
     #include "wx/menu.h"
+    #include "wx/accel.h"
 #endif //WX_PRECOMP
 
 #include "wx/cmdproc.h"
@@ -53,10 +50,6 @@ wxCommand::wxCommand(bool canUndoIt, const wxString& name)
     m_commandName = name;
 }
 
-wxCommand::~wxCommand()
-{
-}
-
 // ----------------------------------------------------------------------------
 // Command processor
 // ----------------------------------------------------------------------------
@@ -65,13 +58,16 @@ wxCommandProcessor::wxCommandProcessor(int maxCommands)
 {
     m_maxNoCommands = maxCommands;
 #if wxUSE_MENUS
-    m_commandEditMenu = (wxMenu *) NULL;
+    m_commandEditMenu = NULL;
 #endif // wxUSE_MENUS
-    m_undoAccelerator = wxT("\tCtrl+Z");
-    m_redoAccelerator = wxT("\tCtrl+Y");
-#if !wxUSE_STL
-    m_currentCommand = NULL;
-#endif
+
+#if wxUSE_ACCEL
+    m_undoAccelerator = '\t' + wxAcceleratorEntry(wxACCEL_CTRL, 'Z').ToString();
+    m_redoAccelerator = '\t' + wxAcceleratorEntry(wxACCEL_CTRL, 'Y').ToString();
+#endif // wxUSE_ACCEL
+
+    m_lastSavedCommand =
+    m_currentCommand = wxList::compatibility_iterator();
 }
 
 wxCommandProcessor::~wxCommandProcessor()
@@ -94,7 +90,7 @@ bool wxCommandProcessor::UndoCommand(wxCommand& cmd)
 // storeIt is false.
 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
 {
-    wxCHECK_MSG( command, false, _T("no command in wxCommandProcessor::Submit") );
+    wxCHECK_MSG( command, false, wxT("no command in wxCommandProcessor::Submit") );
 
     if ( !DoCommand(*command) )
     {
@@ -114,15 +110,7 @@ bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
 
 void wxCommandProcessor::Store(wxCommand *command)
 {
-    wxCHECK_RET( command, _T("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);
-    }
+    wxCHECK_RET( command, wxT("no command in wxCommandProcessor::Store") );
 
     // Correct a bug: we must chop off the current 'branch'
     // so that we're at the end of the command list.
@@ -134,12 +122,31 @@ void wxCommandProcessor::Store(wxCommand *command)
         while (node)
         {
             wxList::compatibility_iterator next = node->GetNext();
+
+            // Make sure m_lastSavedCommand won't point to freed memory
+            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();
@@ -163,7 +170,7 @@ bool wxCommandProcessor::Undo()
 
 bool wxCommandProcessor::Redo()
 {
-    wxCommand *redoCommand = (wxCommand *) NULL;
+    wxCommand *redoCommand = NULL;
     wxList::compatibility_iterator redoNode
 #if !wxUSE_STL
         = NULL          // just to avoid warnings
@@ -253,7 +260,7 @@ 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;
@@ -279,7 +286,7 @@ 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
@@ -299,7 +306,7 @@ 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;
         }
     }
@@ -316,7 +323,9 @@ void wxCommandProcessor::ClearCommands()
         m_commands.Erase(node);
         node = m_commands.GetFirst();
     }
+
     m_currentCommand = wxList::compatibility_iterator();
+    m_lastSavedCommand = wxList::compatibility_iterator();
 }