From 696135a6bba3d083d326eda1f81471c636987afb Mon Sep 17 00:00:00 2001
From: elkowar <dev@elkowar.dev>
Date: Wed, 21 Aug 2024 18:33:26 +0200
Subject: [PATCH] Set GDK_BACKEND env var on wayland

---
 crates/eww/src/display_backend.rs | 4 ++++
 crates/eww/src/main.rs            | 6 +++++-
 crates/eww/src/server.rs          | 3 +++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/crates/eww/src/display_backend.rs b/crates/eww/src/display_backend.rs
index d416166b..16cd8662 100644
--- a/crates/eww/src/display_backend.rs
+++ b/crates/eww/src/display_backend.rs
@@ -8,6 +8,7 @@ pub use platform_x11::{set_xprops, X11Backend};
 
 pub trait DisplayBackend: Send + Sync + 'static {
     const IS_X11: bool;
+    const IS_WAYLAND: bool;
 
     fn initialize_window(window_init: &WindowInitiator, monitor: gdk::Rectangle, x: i32, y: i32) -> Option<Window>;
 }
@@ -16,6 +17,7 @@ pub struct NoBackend;
 
 impl DisplayBackend for NoBackend {
     const IS_X11: bool = false;
+    const IS_WAYLAND: bool = false;
 
     fn initialize_window(_window_init: &WindowInitiator, _monitor: gdk::Rectangle, x: i32, y: i32) -> Option<Window> {
         Some(Window::new(gtk::WindowType::Toplevel, x, y))
@@ -34,6 +36,7 @@ mod platform_wayland {
 
     impl DisplayBackend for WaylandBackend {
         const IS_X11: bool = false;
+        const IS_WAYLAND: bool = true;
 
         fn initialize_window(window_init: &WindowInitiator, monitor: gdk::Rectangle, x: i32, y: i32) -> Option<Window> {
             let window = Window::new(gtk::WindowType::Toplevel, x, y);
@@ -134,6 +137,7 @@ mod platform_x11 {
     pub struct X11Backend;
     impl DisplayBackend for X11Backend {
         const IS_X11: bool = true;
+        const IS_WAYLAND: bool = false;
 
         fn initialize_window(window_init: &WindowInitiator, _monitor: gdk::Rectangle, x: i32, y: i32) -> Option<Window> {
             let window_type =
diff --git a/crates/eww/src/main.rs b/crates/eww/src/main.rs
index 0db2b975..ad46da99 100644
--- a/crates/eww/src/main.rs
+++ b/crates/eww/src/main.rs
@@ -54,11 +54,15 @@ fn main() {
     }
 
     #[allow(unused)]
-    let use_wayland = opts.force_wayland || detect_wayland();
+    let detected_wayland = detect_wayland();
+    #[allow(unused)]
+    let use_wayland = opts.force_wayland || detected_wayland;
     #[cfg(all(feature = "wayland", feature = "x11"))]
     let result = if use_wayland {
+        log::info!("Running on wayland. force_wayland={}, detected_wayland={}", opts.force_wayland, detected_wayland);
         run(opts, eww_binary_name, display_backend::WaylandBackend)
     } else {
+        log::info!("Running on X11. force_wayland={}, detected_wayland={}", opts.force_wayland, detected_wayland);
         run(opts, eww_binary_name, display_backend::X11Backend)
     };
 
diff --git a/crates/eww/src/server.rs b/crates/eww/src/server.rs
index 50b24b2f..6c5a9d91 100644
--- a/crates/eww/src/server.rs
+++ b/crates/eww/src/server.rs
@@ -68,6 +68,9 @@ pub fn initialize_server<B: DisplayBackend>(
         }
     });
 
+    if B::IS_WAYLAND {
+        std::env::set_var("GDK_BACKEND", "wayland")
+    }
     gtk::init()?;
 
     log::debug!("Initializing script var handler");