From d7528a8338a2b0f6c81063a2d16c2f716ac41168 Mon Sep 17 00:00:00 2001
From: Elias Naur <mail@eliasnaur.com>
Date: Mon, 11 Dec 2023 15:00:58 -0600
Subject: [PATCH] app: [macOS] use NSNotificationCenter to receive app events

Notifications don't require a list of windows nor an app delegate.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
---
 app/os_macos.go | 14 --------------
 app/os_macos.m  | 21 +++++++++++++++------
 2 files changed, 15 insertions(+), 20 deletions(-)

diff --git a/app/os_macos.go b/app/os_macos.go
index b7842c33..e4d7b517 100644
--- a/app/os_macos.go
+++ b/app/os_macos.go
@@ -851,20 +851,6 @@ func gio_onWindowed(view C.CFTypeRef) {
 	w.ProcessEvent(ConfigEvent{Config: w.config})
 }
 
-//export gio_onAppHide
-func gio_onAppHide() {
-	for _, w := range viewMap {
-		w.setStage(StagePaused)
-	}
-}
-
-//export gio_onAppShow
-func gio_onAppShow() {
-	for _, w := range viewMap {
-		w.setStage(StageRunning)
-	}
-}
-
 //export gio_onFinishLaunching
 func gio_onFinishLaunching() {
 	close(launched)
diff --git a/app/os_macos.m b/app/os_macos.m
index 71d28afa..92a126bc 100644
--- a/app/os_macos.m
+++ b/app/os_macos.m
@@ -191,6 +191,12 @@ static void handleMouse(NSView *view, NSEvent *event, int typ, CGFloat dx, CGFlo
     r = [self convertRect:r toView:nil];
     return [[self window] convertRectToScreen:r];
 }
+- (void)applicationWillUnhide:(NSNotification *)notification {
+	gio_onShow((__bridge CFTypeRef)self);
+}
+- (void)applicationDidHide:(NSNotification *)notification {
+	gio_onHide((__bridge CFTypeRef)self);
+}
 @end
 
 // Delegates are weakly referenced from their peers. Nothing
@@ -374,6 +380,15 @@ CFTypeRef gio_createView(void) {
 		GioView* view = [[GioView alloc] initWithFrame:frame];
 		view.wantsLayer = YES;
 		view.layerContentsRedrawPolicy = NSViewLayerContentsRedrawDuringViewResize;
+
+		[[NSNotificationCenter defaultCenter] addObserver:view
+												 selector:@selector(applicationWillUnhide:)
+													 name:NSApplicationWillUnhideNotification
+												   object:nil];
+		[[NSNotificationCenter defaultCenter] addObserver:view
+												 selector:@selector(applicationDidHide:)
+													 name:NSApplicationDidHideNotification
+												   object:nil];
 		return CFBridgingRetain(view);
 	}
 }
@@ -384,12 +399,6 @@ CFTypeRef gio_createView(void) {
 	[NSApp activateIgnoringOtherApps:YES];
 	gio_onFinishLaunching();
 }
-- (void)applicationDidHide:(NSNotification *)aNotification {
-	gio_onAppHide();
-}
-- (void)applicationWillUnhide:(NSNotification *)notification {
-	gio_onAppShow();
-}
 @end
 
 void gio_main() {