From 3afb9065f03f662a3f158b35add3eeffacfbfa23 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <m@mitchellh.com>
Date: Wed, 20 Nov 2024 15:22:05 -0800
Subject: [PATCH] macos: listen for config change and post a notification

---
 macos/Sources/Ghostty/Ghostty.App.swift | 28 +++++++++++++++++++++++++
 macos/Sources/Ghostty/Package.swift     |  4 ++++
 2 files changed, 32 insertions(+)

diff --git a/macos/Sources/Ghostty/Ghostty.App.swift b/macos/Sources/Ghostty/Ghostty.App.swift
index 489493ad3..cc365ce4f 100644
--- a/macos/Sources/Ghostty/Ghostty.App.swift
+++ b/macos/Sources/Ghostty/Ghostty.App.swift
@@ -524,6 +524,9 @@ extension Ghostty {
             case GHOSTTY_ACTION_KEY_SEQUENCE:
                 keySequence(app, target: target, v: action.action.key_sequence)
 
+            case GHOSTTY_ACTION_CONFIG_CHANGE:
+                configChange(app, target: target, v: action.action.config_change)
+
             case GHOSTTY_ACTION_COLOR_CHANGE:
                 fallthrough
             case GHOSTTY_ACTION_CLOSE_ALL_WINDOWS:
@@ -1159,6 +1162,31 @@ extension Ghostty {
             }
         }
 
+        private static func configChange(
+            _ app: ghostty_app_t,
+            target: ghostty_target_s,
+            v: ghostty_action_config_change_s) {
+            switch (target.tag) {
+            case GHOSTTY_TARGET_APP:
+                NotificationCenter.default.post(
+                    name: .ghosttyConfigChange,
+                    object: nil
+                )
+                return
+
+            case GHOSTTY_TARGET_SURFACE:
+                guard let surface = target.target.surface else { return }
+                guard let surfaceView = self.surfaceView(from: surface) else { return }
+                NotificationCenter.default.post(
+                   name: .ghosttyConfigChange,
+                   object: surfaceView
+                )
+
+            default:
+                assertionFailure()
+            }
+        }
+
         // MARK: User Notifications
 
         /// Handle a received user notification. This is called when a user notification is clicked or dismissed by the user
diff --git a/macos/Sources/Ghostty/Package.swift b/macos/Sources/Ghostty/Package.swift
index e4ab91a5f..b926edab5 100644
--- a/macos/Sources/Ghostty/Package.swift
+++ b/macos/Sources/Ghostty/Package.swift
@@ -206,6 +206,10 @@ extension Ghostty {
 // MARK: Surface Notification
 
 extension Notification.Name {
+    /// Configuration change. If the object is nil then it is app-wide. Otherwise its surface-specific.
+    static let ghosttyConfigChange = Notification.Name("com.mitchellh.ghostty.configChange")
+    static let GhosttyConfigChangeKey = ghosttyConfigChange.rawValue
+
     /// Goto tab. Has tab index in the userinfo.
     static let ghosttyMoveTab = Notification.Name("com.mitchellh.ghostty.moveTab")
     static let GhosttyMoveTabKey = ghosttyMoveTab.rawValue