From d58f1ff5dc2397bf3a24d639061c6445a420d6e9 Mon Sep 17 00:00:00 2001
From: Wez Furlong <wez@wezfurlong.org>
Date: Mon, 30 Dec 2019 10:32:12 -0800
Subject: [PATCH] Implement focus_change for macos

Refs: https://github.com/wez/wezterm/issues/93
---
 window/src/os/macos/window.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/window/src/os/macos/window.rs b/window/src/os/macos/window.rs
index 343216860..e03f03ba2 100644
--- a/window/src/os/macos/window.rs
+++ b/window/src/os/macos/window.rs
@@ -918,6 +918,18 @@ impl WindowView {
         }
     }
 
+    extern "C" fn did_become_key(this: &mut Object, _sel: Sel, _id: id) {
+        if let Some(this) = Self::get_this(this) {
+            this.inner.borrow_mut().callbacks.focus_change(true);
+        }
+    }
+
+    extern "C" fn did_resign_key(this: &mut Object, _sel: Sel, _id: id) {
+        if let Some(this) = Self::get_this(this) {
+            this.inner.borrow_mut().callbacks.focus_change(false);
+        }
+    }
+
     // Switch the coordinate system to have 0,0 in the top left
     extern "C" fn is_flipped(_this: &Object, _sel: Sel) -> BOOL {
         YES
@@ -1296,6 +1308,15 @@ impl WindowView {
                 Self::did_resize as extern "C" fn(&mut Object, Sel, id),
             );
 
+            cls.add_method(
+                sel!(windowDidBecomeKey:),
+                Self::did_become_key as extern "C" fn(&mut Object, Sel, id),
+            );
+            cls.add_method(
+                sel!(windowDidResignKey:),
+                Self::did_resign_key as extern "C" fn(&mut Object, Sel, id),
+            );
+
             cls.add_method(
                 sel!(mouseMoved:),
                 Self::mouse_moved_or_dragged as extern "C" fn(&mut Object, Sel, id),