app/internal/window: [macOS] only terminate app when last window closes

Updates #19

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/internal/window/os_macos.go

@@ -39,6 +39,7 @@ __attribute__ ((visibility ("hidden"))) CFTypeRef gio_readClipboard(void);
 __attribute__ ((visibility ("hidden"))) void gio_writeClipboard(unichar *chars, NSUInteger length);
 __attribute__ ((visibility ("hidden"))) void gio_setNeedsDisplay(CFTypeRef viewRef);
 __attribute__ ((visibility ("hidden"))) void gio_makeKeyAndOrderFront(CFTypeRef viewRef);
+__attribute__ ((visibility ("hidden"))) void gio_appTerminate(void);
 */
 import "C"
 
@@ -239,12 +240,15 @@ func configFor(scale float32) config {
 	}
 }
 
-//export gio_onTerminate
+//export gio_onClose
-func gio_onTerminate(view C.CFTypeRef) {
+func gio_onClose(view C.CFTypeRef) {
 	w := mustView(view)
 	w.displayLink.Close()
 	deleteView(view)
 	w.w.Event(system.DestroyEvent{})
+	if len(viewMap) == 0 {
+		C.gio_appTerminate()
+	}
 }
 
 //export gio_onHide

app/internal/window/os_macos.m

@@ -50,8 +50,7 @@
 - (void)windowWillClose:(NSNotification *)notification {
 	NSWindow *window = (NSWindow *)[notification object];
 	window.delegate = nil;
-	gio_onTerminate((__bridge CFTypeRef)window.contentView);
+	gio_onClose((__bridge CFTypeRef)window.contentView);
-	[NSApp terminate:nil];
 }
 @end
 
@@ -151,6 +150,12 @@ void gio_makeKeyAndOrderFront(CFTypeRef viewRef) {
 	[view.window makeKeyAndOrderFront:nil];
 }
 
+void gio_appTerminate(void) {
+	@autoreleasepool {
+		[NSApp terminate:nil];
+	}
+}
+
 void gio_main(CFTypeRef viewRef, const char *title, CGFloat width, CGFloat height) {
 	@autoreleasepool {
 		[NSApplication sharedApplication];