GSRunner: macOS support

common/CocoaTools.h

@@ -31,6 +31,17 @@ namespace CocoaTools
 	bool DelayedLaunch(std::string_view file);
 	/// Open a Finder window to the given URL
 	bool ShowInFinder(std::string_view file);
+
+	/// Create a window
+	void* CreateWindow(std::string_view title, uint32_t width, uint32_t height);
+	/// Destroy a window
+	void DestroyWindow(void* window);
+	/// Make a WindowInfo from the given window
+	void GetWindowInfoFromWindow(WindowInfo* wi, void* window);
+	/// Run cocoa event loop
+	void RunCocoaEventLoop(bool wait_forever = false);
+	/// Posts an event to the main telling `RunCocoaEventLoop(true)` to exit
+	void StopMainThreadEventLoop();
 }
 
 #endif // __APPLE__

common/CocoaTools.mm

@@ -226,3 +226,87 @@ bool CocoaTools::ShowInFinder(std::string_view file)
 	return [[NSWorkspace sharedWorkspace] selectFile:NSStringFromStringView(file)
 	                        inFileViewerRootedAtPath:nil];
 }
+
+// MARK: - GSRunner
+
+void* CocoaTools::CreateWindow(std::string_view title, u32 width, u32 height)
+{
+	if (!NSApp)
+	{
+		[NSApplication sharedApplication];
+		[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
+		[NSApp finishLaunching];
+	}
+	constexpr NSWindowStyleMask style = NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | NSWindowStyleMaskResizable;
+	NSScreen* mainScreen = [NSScreen mainScreen];
+	// Center the window on the screen, because why not
+	NSRect screenFrame = [mainScreen frame];
+	NSRect viewFrame = screenFrame;
+	viewFrame.size = NSMakeSize(width, height);
+	viewFrame.origin.x += (screenFrame.size.width - viewFrame.size.width) / 2;
+	viewFrame.origin.y += (screenFrame.size.height - viewFrame.size.height) / 2;
+	NSWindow* window = [[NSWindow alloc]
+		initWithContentRect:viewFrame
+		          styleMask:style
+		            backing:NSBackingStoreBuffered
+		              defer:NO];
+	[window setTitle:NSStringFromStringView(title)];
+	[window makeKeyAndOrderFront:window];
+	return (__bridge_retained void*)window;
+}
+
+void CocoaTools::DestroyWindow(void* window)
+{
+	(void)(__bridge_transfer NSWindow*)window;
+}
+
+void CocoaTools::GetWindowInfoFromWindow(WindowInfo* wi, void* cf_window)
+{
+	if (cf_window)
+	{
+		NSWindow* window = (__bridge NSWindow*)cf_window;
+		float scale = [window backingScaleFactor];
+		NSView* view = [window contentView];
+		NSRect dims = [view frame];
+		wi->type = WindowInfo::Type::MacOS;
+		wi->window_handle = (__bridge void*)view;
+		wi->surface_width = dims.size.width * scale;
+		wi->surface_height = dims.size.height * scale;
+		wi->surface_scale = scale;
+	}
+	else
+	{
+		wi->type = WindowInfo::Type::Surfaceless;
+	}
+}
+
+static constexpr short STOP_EVENT_LOOP = 0x100;
+
+void CocoaTools::RunCocoaEventLoop(bool forever)
+{
+	NSDate* end = forever ? [NSDate distantFuture] : [NSDate distantPast];
+	while (true)
+	{ @autoreleasepool {
+		NSEvent* ev = [NSApp nextEventMatchingMask:NSEventMaskAny
+		                                 untilDate:end
+		                                    inMode:NSDefaultRunLoopMode
+		                                   dequeue:YES];
+		if (!ev || ([ev type] == NSEventTypeApplicationDefined && [ev subtype] == STOP_EVENT_LOOP))
+			break;
+		[NSApp sendEvent:ev];
+	}}
+}
+
+void CocoaTools::StopMainThreadEventLoop()
+{ @autoreleasepool {
+	NSEvent* ev = [NSEvent otherEventWithType:NSEventTypeApplicationDefined
+	                                 location:{}
+	                            modifierFlags:0
+	                                timestamp:0
+	                             windowNumber:0
+	                                  context:nil
+	                                  subtype:STOP_EVENT_LOOP
+	                                    data1:0
+	                                    data2:0];
+	[NSApp postEvent:ev atStart:NO];
+}}