From d5fbf95178591fd9200d37289ed968cdb54fbab4 Mon Sep 17 00:00:00 2001
From: TheoryOfNekomata <allan.crisostomo@outlook.com>
Date: Fri, 6 Jan 2023 20:05:41 +0800
Subject: [PATCH] Add macOS bare implementation

macOS implementation is untested.
---
 .gitignore     |   1 +
 CMakeLists.txt |   5 +-
 src/main.c     | 168 ++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 172 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 990936c..b6aaf4c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .idea/
 cmake-build-debug/
+.DS_Store
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 08aa462..f2af117 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,8 +13,11 @@ if (WIN32)
         add_definitions(-DWIN32)
     endif ()
     add_executable(cerberus WIN32 src/main.c)
-elseif(APPLE)
+elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
     add_definitions(-DMACOS)
+    add_executable(cerberus src/main.c)
+    include_directories(/usr/include)
+    link_directories()
 elseif(UNIX)
     add_definitions(-DUNIX)
 endif ()
diff --git a/src/main.c b/src/main.c
index 500f491..c96bca4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,3 +1,8 @@
+#define WINDOW_X 0
+#define WINDOW_Y 0
+#define WINDOW_WIDTH 350
+#define WINDOW_HEIGHT 250
+
 #ifdef WIN64
 
 #include <windows.h>
@@ -25,7 +30,7 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
 	RegisterClassW(&wc);
 	hwnd = CreateWindowW(wc.lpszClassName, windowName,
 											 WS_OVERLAPPEDWINDOW | WS_VISIBLE,
-											 100, 100, 350, 250, NULL, NULL, hInstance, NULL);
+											 WINDOW_X, WINDOW_Y, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL);
 
 	ShowWindow(hwnd, nCmdShow);
 	UpdateWindow(hwnd);
@@ -53,6 +58,167 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
 
 #elif defined MACOS
 
+//original objective-c
+//
+//#import <Cocoa/Cocoa.h>
+//int main ()
+//{
+//	@autoreleasepool{
+//		[NSApplication sharedApplication];
+//		[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
+//		id applicationName = [[NSProcessInfo processInfo] processName];
+//		id window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 120, 120)
+//		styleMask:NSTitledWindowMask backing:NSBackingStoreBuffered defer:NO];
+//		[window cascadeTopLeftFromPoint:NSMakePoint(20,20)];
+//		[window setTitle: applicationName];
+//		[window makeKeyAndOrderFront:nil];
+//		[NSApp activateIgnoringOtherApps:YES];
+//		[NSApp run];
+//	}
+//	return 0;
+//}
+
+// $ clang minimal.c -framework Cocoa -o minimal.app
+
+#include <objc/runtime.h>
+#include <objc/message.h>
+
+#include <Carbon/Carbon.h>
+
+#define cls objc_getClass
+#define sel sel_getUid
+#define msg ((id (*)(id, SEL, ...))objc_msgSend)
+#define cls_msg ((id (*)(Class, SEL, ...))objc_msgSend)
+
+// poor man's bindings!
+typedef enum NSApplicationActivationPolicy {
+	NSApplicationActivationPolicyRegular   = 0,
+	NSApplicationActivationPolicyAccessory = 1,
+	NSApplicationActivationPolicyERROR     = 2,
+} NSApplicationActivationPolicy;
+
+typedef enum NSWindowStyleMask {
+	NSWindowStyleMaskBorderless     = 0,
+	NSWindowStyleMaskTitled         = 1 << 0,
+	NSWindowStyleMaskClosable       = 1 << 1,
+	NSWindowStyleMaskMiniaturizable = 1 << 2,
+	NSWindowStyleMaskResizable      = 1 << 3,
+} NSWindowStyleMask;
+
+typedef enum NSBackingStoreType {
+	NSBackingStoreBuffered = 2,
+} NSBackingStoreType;
+
+int main(int argc, char *argv[])
+{
+	// id app = [NSApplication sharedApplication];
+	id app = cls_msg(cls("NSApplication"), sel("sharedApplication"));
+
+	// [app setActivationPolicy:NSApplicationActivationPolicyRegular];
+	msg(app, sel("setActivationPolicy:"), NSApplicationActivationPolicyRegular);
+
+	struct CGRect frameRect = {0, 0, 600, 500};
+
+	// id window = [[NSWindow alloc] initWithContentRect:frameRect styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskClosable|NSWindowStyleMaskResizable backing:NSBackingStoreBuffered defer:NO];
+	id window = msg(cls_msg(cls("NSWindow"), sel("alloc")),
+									sel("initWithContentRect:styleMask:backing:defer:"),
+									frameRect,
+									NSWindowStyleMaskTitled|NSWindowStyleMaskClosable|NSWindowStyleMaskResizable,
+									NSBackingStoreBuffered,
+									false);
+	msg(window, sel("setTitle:"), cls_msg(cls("NSString"), sel("stringWithUTF8String:"), "Pure C App"));
+
+	// [window makeKeyAndOrderFront:nil];
+	msg(window, sel("makeKeyAndOrderFront:"), nil);
+
+	// [app activateIgnoringOtherApps:YES];
+	msg(app, sel("activateIgnoringOtherApps:"), true);
+
+	msg(app, sel("run"));
+}
+
+//
+//#include <objc/runtime.h>
+//#include <objc/message.h>
+//
+//#include <Carbon/Carbon.h>
+//
+//#define cls objc_getClass
+//#define sel sel_getUid
+//#define msg ((id (*)(id, SEL, ...))objc_msgSend)
+//#define cls_msg ((id (*)(Class, SEL, ...))objc_msgSend)
+//
+//// poor man's bindings!
+//typedef enum NSApplicationActivationPolicy {
+//	NSApplicationActivationPolicyRegular   = 0,
+//	NSApplicationActivationPolicyAccessory = 1,
+//	NSApplicationActivationPolicyERROR     = 2,
+//} NSApplicationActivationPolicy;
+//
+//typedef enum NSWindowStyleMask {
+//	NSWindowStyleMaskBorderless     = 0,
+//	NSWindowStyleMaskTitled         = 1 << 0,
+//	NSWindowStyleMaskClosable       = 1 << 1,
+//	NSWindowStyleMaskMiniaturizable = 1 << 2,
+//	NSWindowStyleMaskResizable      = 1 << 3,
+//} NSWindowStyleMask;
+//
+//typedef enum NSBackingStoreType {
+//	NSBackingStoreBuffered = 2,
+//} NSBackingStoreType;
+//
+//int main(int argc, char *argv[])
+//{
+//	// id app = [NSApplication sharedApplication];
+//	id app = cls_msg(
+//		cls("NSApplication"),
+//		sel("sharedApplication")
+//	);
+//
+//	// [app setActivationPolicy:NSApplicationActivationPolicyRegular];
+//	msg(
+//		app,
+//		sel("setActivationPolicy:"),
+//		NSApplicationActivationPolicyRegular
+//	);
+//
+//	struct CGRect frameRect = {
+//		WINDOW_X,
+//		WINDOW_Y,
+//		WINDOW_WIDTH,
+//		WINDOW_HEIGHT
+//	};
+//
+//	id applicationName = msg(
+//		cls_msg(
+//			cls("NSProcessInfo"),
+//			sel("processInfo")
+//		),
+//		sel("processName")
+//	);
+//
+//	// id window = [[NSWindow alloc] initWithContentRect:frameRect styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskClosable|NSWindowStyleMaskResizable backing:NSBackingStoreBuffered defer:NO];
+//	id window = msg(
+//		cls_msg(cls("NSWindow"), sel("alloc")),
+//		sel("initWithContentRect:styleMask:backing:defer:"),
+//			frameRect,
+//			NSWindowStyleMaskTitled|NSWindowStyleMaskClosable|NSWindowStyleMaskResizable,
+//			NSBackingStoreBuffered,
+//			false
+//	);
+//
+//	printf("%p\n", window);
+//	msg(window, sel("setTitle:"), applicationName);
+
+	// [window makeKeyAndOrderFront:nil];
+	//msg(window, sel("makeKeyAndOrderFront:"), nil);
+
+	// [app activateIgnoringOtherApps:YES];
+	//msg(app, sel("activateIgnoringOtherApps:"), true);
+
+	//msg(app, sel("run"));
+//}
+
 // https://stackoverflow.com/questions/30269329/creating-window-application-in-pure-c-on-mac-osx
 
 #endif