Add she::Logger to log errors in Mac OS X console

src/she/CMakeLists.txt

@@ -5,8 +5,12 @@ set(SHE_SOURCES
   alleg4/fontbmp.cpp
   alleg4/she_alleg4.cpp)
 
-if(APPLE AND NOT USE_SHARED_ALLEGRO4)
+if(APPLE)
+  if(NOT USE_SHARED_ALLEGRO4)
     list(APPEND SHE_SOURCES alleg4/app.mm)
   endif()
 
+  list(APPEND SHE_SOURCES osx/logger.mm)
+endif()
+
 add_library(she ${SHE_SOURCES})

src/she/alleg4/she_alleg4.cpp

@@ -14,6 +14,7 @@
 #include "base/string.h"
 #include "she/alleg4/alleg4_font.h"
 #include "she/alleg4/alleg4_surface.h"
+#include "she/logger.h"
 
 #include <allegro.h>
 #include <allegro/internal/aintern.h>
@@ -22,6 +23,7 @@
   #include <winalleg.h>
 
   #include <windowsx.h>
+
   #include <commctrl.h>
 
   #if defined STRICT || defined __GNUC__
@@ -78,6 +80,10 @@ static void resize_callback(RESIZE_DISPLAY_EVENT* ev)
 
 namespace she {
 
+#ifdef __APPLE__
+  Logger* getOsxLogger();
+#endif
+
 class Alleg4EventQueue : public EventQueue {
 public:
   Alleg4EventQueue() {
@@ -681,6 +687,14 @@ public:
        );
   }
 
+  Logger* logger() override {
+#ifdef __APPLE__
+    return getOsxLogger();
+#else
+    return NULL;
+#endif
+  }
+
   Display* defaultDisplay() override {
     return unique_display;
   }
@@ -740,6 +754,9 @@ System* instance()
 
 void error_message(const char* msg)
 {
+  if (g_instance && g_instance->logger())
+    g_instance->logger()->logError(msg);
+
 #ifdef WIN32
   std::wstring wmsg = base::from_utf8(msg);
   std::wstring title = base::from_utf8(PACKAGE);

src/she/logger.h

@@ -0,0 +1,21 @@
+// SHE library
+// Copyright (C) 2012-2014  David Capello
+//
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
+
+#ifndef SHE_LOGGER_H_INCLUDED
+#define SHE_LOGGER_H_INCLUDED
+#pragma once
+
+namespace she {
+
+  class Logger {
+  public:
+    virtual ~Logger() { }
+    virtual void logError(const char* error) = 0;
+  };
+
+} // namespace she
+
+#endif

src/she/osx/logger.mm

@@ -0,0 +1,25 @@
+// SHE library
+// Copyright (C) 2012-2014  David Capello
+//
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <Foundation/Foundation.h>
+
+#include "she/logger.h"
+
+namespace she {
+
+  class OSXLogger : public Logger {
+  public:
+    void logError(const char* error) override {
+      NSLog([NSString stringWithUTF8String:error]);
+    }
+  };
+
+  Logger* getOsxLogger() {
+    return new OSXLogger;
+  }
+
+} // namespace she

src/she/system.h

@@ -17,6 +17,7 @@ namespace she {
   class Display;
   class EventLoop;
   class Font;
+  class Logger;
   class Surface;
 
   class DisplayCreationException : std::runtime_error {
@@ -30,6 +31,7 @@ namespace she {
     virtual ~System() { }
     virtual void dispose() = 0;
     virtual Capabilities capabilities() const = 0;
+    virtual Logger* logger() = 0;
     virtual Display* defaultDisplay() = 0;
     virtual Font* defaultFont() = 0;
     virtual Display* createDisplay(int width, int height, int scale) = 0;