BACKENDS: Add OSystem::displayLogFile interface + OSX implementation

backends/platform/sdl/macosx/macosx.cpp

@@ -34,6 +34,7 @@
 #include "common/fs.h"
 
 #include "CoreFoundation/CoreFoundation.h"
+#include "CoreServices/CoreServices.h"
 
 OSystem_MacOSX::OSystem_MacOSX()
 	:
@@ -75,4 +76,27 @@ void OSystem_MacOSX::setupIcon() {
 	// Don't set icon on OS X, as we use a nicer external icon there. 
 }
 
+bool OSystem_MacOSX::hasFeature(Feature f) {
+	if (f == kFeatureDisplayLogFile)
+		return true;
+	return OSystem_POSIX::hasFeature(f);
+}
+
+bool OSystem_MacOSX::displayLogFile() {
+	// Use LaunchServices to open the log file, if possible.
+
+	if (_logFilePath.empty())
+		return false;
+
+    FSRef ref;
+    OSStatus err;
+
+    err = FSPathMakeRef((const UInt8 *)_logFilePath.c_str(), &ref, NULL);
+    if (err == noErr) {
+        err = LSOpenFSRef(&ref, NULL);
+    }
+
+    return err != noErr;
+}
+
 #endif