Implemented the OSX clipboard using the AppKit API

The X11 dependency is no longer needed on OSX, and has been removed

CMakeLists.txt

@@ -256,12 +256,8 @@ include("${colobot_SOURCE_DIR}/cmake/msys.cmake")
 ##
 # Clipboard support needs X11 libraries
 ##
-if(PLATFORM_GNU OR PLATFORM_MACOSX)
+if(PLATFORM_GNU)
     find_package(X11 REQUIRED)
-    if(PLATFORM_MACOSX)
-       # Add the includes for X11
-       include_directories("/opt/X11/include")
-    endif()
 endif()
 
 

lib/clipboard/CMakeLists.txt

@@ -7,6 +7,9 @@ add_definitions(-DLIB_COMPILE=1)
 
 if(PLATFORM_WINDOWS)
     set(CLIPBOARD_SRC src/clipboardWin32.c)
+elseif(PLATFORM_MACOSX)
+	set(CMAKE_CXX_FLAGS "-fobjc-arc")
+	set(CLIPBOARD_SRC src/clipboardOSX.m)
 else()
     set(CLIPBOARD_SRC src/clipboardX11.c)
 endif()

lib/clipboard/src/clipboardOSX.m

@@ -0,0 +1,24 @@
+
+#include <stdbool.h>
+#include <string.h>
+
+#include <AppKit/AppKit.h>
+
+char *widgetGetClipboardText()
+{
+	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
+	NSString *myString = [pasteboard stringForType:NSPasteboardTypeString];
+
+	if (myString == nil || [myString length] == 0) return NULL;
+
+	return strdup([myString UTF8String]);
+}
+
+bool widgetSetClipboardText(const char *text)
+{
+	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
+	[pasteboard clearContents];
+
+	NSString *stringFromUTFString = [[NSString alloc] initWithUTF8String:text];
+	return [pasteboard setString:stringFromUTFString forType:NSStringPboardType];
+}

src/CMakeLists.txt

@@ -35,7 +35,7 @@ elseif(PLATFORM_LINUX)
     set(PLATFORM_LIBS "-lrt -lX11")
 elseif(PLATFORM_MACOSX)
     find_library(LIBINTL_LIBRARY NAMES intl libintl )
-    set(PLATFORM_LIBS ${LIBINTL_LIBRARY} ${X11_X11_LIB})
+    set(PLATFORM_LIBS ${LIBINTL_LIBRARY})
 endif()