From 69ae847273aa2b0a64bdb07cf19d3f6fbaaa6b71 Mon Sep 17 00:00:00 2001
From: Wez Furlong <wez@wezfurlong.org>
Date: Sat, 8 Apr 2023 11:24:25 -0700
Subject: [PATCH] windows: fix: mess up full screen mode on config reload

refs: https://github.com/wez/wezterm/issues/3439
---
 docs/changelog.md               |  2 ++
 window/src/os/windows/window.rs | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/docs/changelog.md b/docs/changelog.md
index f8e0d050187..41b3f986f10 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -135,6 +135,8 @@ As features stabilize some brief notes about them will accumulate here.
 * Wayland: window not repainting consistently when using the keyboard when
   using `front_end="WebGpu"`.  Thanks to @jokeyrhyme for working through
   different iterations of this fix! #3126
+* Windows: reloading the config could partially knock the window out of
+  full screen mode. #3439
 
 ### 20230326-111934-3666303c
 
diff --git a/window/src/os/windows/window.rs b/window/src/os/windows/window.rs
index 125992f6571..6bb6f88fcaf 100644
--- a/window/src/os/windows/window.rs
+++ b/window/src/os/windows/window.rs
@@ -306,6 +306,16 @@ fn schedule_apply_decoration(hwnd: HWND, decorations: WindowDecorations) {
 }
 
 fn apply_decoration_immediate(hwnd: HWND, decorations: WindowDecorations) {
+    match rc_from_hwnd(hwnd) {
+        Some(inner) => {
+            if inner.borrow().saved_placement.is_some() {
+                // We are full screen; ignore it for now
+                return;
+            }
+        }
+        None => return,
+    };
+
     unsafe {
         let orig_style = GetWindowLongW(hwnd, GWL_STYLE);
         let style = decorations_to_style(decorations);