From 4058ffef0b6fdbdb4abd90e30bc63f31024df50b Mon Sep 17 00:00:00 2001
From: Felix Kratz <felix.kratz@tu-dortmund.de>
Date: Thu, 1 Jun 2023 09:01:49 +0200
Subject: [PATCH] fix aliases not updating properly when the parent application
 is restarted (#377)

---
 src/alias.c  | 7 ++++++-
 src/window.c | 5 ++++-
 src/window.h | 2 +-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/alias.c b/src/alias.c
index 1f52037..88b1f2b 100644
--- a/src/alias.c
+++ b/src/alias.c
@@ -158,9 +158,14 @@ static bool alias_update_image(struct alias* alias, bool forced) {
   if (alias->window.id == 0) alias_find_window(alias);
   if (alias->window.id == 0) return false;
 
-  CGImageRef image_ref = window_capture(&alias->window);
+  bool disabled = false;
+  CGImageRef image_ref = window_capture(&alias->window, &disabled);
 
   if (!image_ref) {
+    if (!disabled) {
+      alias->window.id = 0;
+      image_destroy(&alias->image);
+    }
     return false;
   }
 
diff --git a/src/window.c b/src/window.c
index 91550eb..f1e4619 100644
--- a/src/window.c
+++ b/src/window.c
@@ -241,18 +241,21 @@ void window_disable_shadow(struct window* window) {
   CFRelease(shadow_props_cf);
 }
 
-CGImageRef window_capture(struct window* window) {
+CGImageRef window_capture(struct window* window, bool* disabled) {
   if (g_disable_capture) {
     int64_t time = clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW_APPROX);
     if (g_disable_capture < 0) {
+      *disabled = true;
       return NULL;
     } else if (time - g_disable_capture > (1ULL << 30)) {
       g_disable_capture = 0;
     } else {
+      *disabled = true;
       return NULL;
     }
   }
 
+  *disabled = false;
   CGImageRef image_ref = NULL;
 
   uint64_t wid = window->id;
diff --git a/src/window.h b/src/window.h
index 1d567c6..1419e29 100644
--- a/src/window.h
+++ b/src/window.h
@@ -95,7 +95,7 @@ void window_set_level(struct window* window, uint32_t level);
 void window_order(struct window* window, struct window* parent, int mode);
 void window_assign_mouse_tracking_area(struct window* window, CGRect rect);
 
-CGImageRef window_capture(struct window* window);
+CGImageRef window_capture(struct window* window, bool* disabled);
 
 void context_set_font_smoothing(CGContextRef context, bool smoothing);