Prevent seg fault for older GTK+

[wxWidgets.git] / include / wx / msgout.h

diff --git a/include/wx/msgout.h b/include/wx/msgout.h
old mode 100755 (executable)
new mode 100644 (file)
index ad8f039..56b11a6
--- a/include/wx/msgout.h
+++ b/include/wx/msgout.h
@@ -5,8 +5,8 @@
 // Modified by:
 // Created:     17.07.02
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWidgets team
-// Licence:     wxWidgets licence
+// Copyright:   (c) Mattia Barbon
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_MSGOUT_H_
@@ -16,43 +16,105 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) && !defined(__EMX__)
-// Some older compilers (such as EMX) cannot handle
-// #pragma interface/implementation correctly, iff 
-// #pragma implementation is used in _two_ translation
-// units (as created by e.g. event.cpp compiled for
-// libwx_base and event.cpp compiled for libwx_gui_core).
-// So we must not use those pragmas for those compilers in
-// such files.
-    #pragma interface "msgout.h"
-#endif
-
 #include "wx/defs.h"
-#include "wx/wxchar.h"
+#include "wx/chartype.h"
+#include "wx/strvararg.h"
 
 // ----------------------------------------------------------------------------
 // wxMessageOutput is a class abstracting formatted output target, i.e.
 // something you can printf() to
 // ----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_BASE wxMessageOutput
+// NB: VC6 has a bug that causes linker errors if you have template methods
+//     in a class using __declspec(dllimport). The solution is to split such
+//     class into two classes, one that contains the template methods and does
+//     *not* use WXDLLIMPEXP_BASE and another class that contains the rest
+//     (with DLL linkage).
+class wxMessageOutputBase
 {
 public:
-    virtual ~wxMessageOutput() { }
+    virtual ~wxMessageOutputBase() { }
 
     // show a message to the user
-    virtual void Printf(const wxChar* format, ...)  ATTRIBUTE_PRINTF_2 = 0;
+    // void Printf(const wxString& format, ...) = 0;
+    WX_DEFINE_VARARG_FUNC_VOID(Printf, 1, (const wxFormatString&),
+                               DoPrintfWchar, DoPrintfUtf8)
+#ifdef __WATCOMC__
+    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+    WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wxString&),
+                                (wxFormatString(f1)));
+    WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wxCStrData&),
+                                (wxFormatString(f1)));
+    WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const char*),
+                                (wxFormatString(f1)));
+    WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wchar_t*),
+                                (wxFormatString(f1)));
+#endif
+
+protected:
+    // NB: this is pure virtual so that it can be implemented in dllexported
+    //     wxMessagOutput class
+#if !wxUSE_UTF8_LOCALE_ONLY
+    virtual void DoPrintfWchar(const wxChar *format, ...) = 0;
+#endif
+#if wxUSE_UNICODE_UTF8
+    virtual void DoPrintfUtf8(const char *format, ...) = 0;
+#endif
+
+    // called by DoPrintf() to output formatted string
+    virtual void Output(const wxString& str) = 0;
+};
+
+#ifdef __VISUALC__
+    // "non dll-interface class 'wxStringPrintfMixin' used as base interface
+    // for dll-interface class 'wxString'" -- this is OK in our case
+    #pragma warning (disable:4275)
+#endif
+
+class WXDLLIMPEXP_BASE wxMessageOutput : public wxMessageOutputBase
+{
+public:
+    virtual ~wxMessageOutput() { }
 
-    // gets the current wxMessageOutput object
+    // gets the current wxMessageOutput object (may be NULL during
+    // initialization or shutdown)
     static wxMessageOutput* Get();
 
     // sets the global wxMessageOutput instance; returns the previous one
     static wxMessageOutput* Set(wxMessageOutput* msgout);
 
+protected:
+#if !wxUSE_UTF8_LOCALE_ONLY
+    virtual void DoPrintfWchar(const wxChar *format, ...);
+#endif
+#if wxUSE_UNICODE_UTF8
+    virtual void DoPrintfUtf8(const char *format, ...);
+#endif
+    virtual void Output(const wxString& str) = 0;
+
 private:
     static wxMessageOutput* ms_msgOut;
 };
 
+#ifdef __VISUALC__
+    #pragma warning (default:4275)
+#endif
+
+// ----------------------------------------------------------------------------
+// implementation showing the message to the user in "best" possible way: uses
+// native message box if available (currently only under Windows) and stderr
+// otherwise; unlike wxMessageOutputMessageBox this class is always safe to use
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxMessageOutputBest : public wxMessageOutput
+{
+public:
+    wxMessageOutputBest() { }
+
+protected:
+    virtual void Output(const wxString& str);
+};
+
 // ----------------------------------------------------------------------------
 // implementation which sends output to stderr
 // ----------------------------------------------------------------------------
@@ -62,7 +124,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputStderr : public wxMessageOutput
 public:
     wxMessageOutputStderr() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void Output(const wxString& str);
 };
 
 // ----------------------------------------------------------------------------
@@ -76,7 +139,8 @@ class WXDLLIMPEXP_CORE wxMessageOutputMessageBox : public wxMessageOutput
 public:
     wxMessageOutputMessageBox() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void Output(const wxString& str);
 };
 
 #endif // wxUSE_GUI
@@ -90,7 +154,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputDebug : public wxMessageOutput
 public:
     wxMessageOutputDebug() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void Output(const wxString& str);
 };
 
 // ----------------------------------------------------------------------------
@@ -102,7 +167,8 @@ class WXDLLIMPEXP_BASE wxMessageOutputLog : public wxMessageOutput
 public:
     wxMessageOutputLog() { }
 
-    virtual void Printf(const wxChar* format, ...) ATTRIBUTE_PRINTF_2;
+protected:
+    virtual void Output(const wxString& str);
 };
 
 #endif