From 7c6915b0ec08c40011355a16939344db41742903 Mon Sep 17 00:00:00 2001
From: Shawn Wallace <yungwallace@live.com>
Date: Sat, 18 May 2024 02:19:26 -0400
Subject: [PATCH] Add wl_region and wl_surface.set_input_region support

Needed for latest Xwayland.
---
 src/clientside.rs      |  3 ++-
 src/server/dispatch.rs | 43 +++++++++++++++++++++++++++++++++++++++---
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/src/clientside.rs b/src/clientside.rs
index 912043c..fe2295c 100644
--- a/src/clientside.rs
+++ b/src/clientside.rs
@@ -6,7 +6,7 @@ use wayland_client::protocol::{
     wl_buffer::WlBuffer, wl_callback::WlCallback, wl_compositor::WlCompositor,
     wl_keyboard::WlKeyboard, wl_output::WlOutput, wl_pointer::WlPointer, wl_registry::WlRegistry,
     wl_seat::WlSeat, wl_shm::WlShm, wl_shm_pool::WlShmPool, wl_surface::WlSurface,
-    wl_touch::WlTouch,
+    wl_touch::WlTouch, wl_region::WlRegion
 };
 use wayland_client::{delegate_noop, Connection, Dispatch, EventQueue, Proxy, QueueHandle};
 use wayland_protocols::wp::relative_pointer::zv1::client::{
@@ -92,6 +92,7 @@ impl ClientState {
 pub type Event<T> = <T as Proxy>::Event;
 
 delegate_noop!(Globals: WlCompositor);
+delegate_noop!(Globals: WlRegion);
 delegate_noop!(Globals: ignore WlShm);
 delegate_noop!(Globals: ignore ZwpLinuxDmabufV1);
 delegate_noop!(Globals: ZwpRelativePointerManagerV1);
diff --git a/src/server/dispatch.rs b/src/server/dispatch.rs
index 56b367e..921497e 100644
--- a/src/server/dispatch.rs
+++ b/src/server/dispatch.rs
@@ -25,9 +25,18 @@ use wayland_protocols::{
 };
 use wayland_server::{
     protocol::{
-        wl_buffer::WlBuffer, wl_callback::WlCallback, wl_compositor::WlCompositor,
-        wl_keyboard::WlKeyboard, wl_output::WlOutput, wl_pointer::WlPointer, wl_seat::WlSeat,
-        wl_shm::WlShm, wl_shm_pool::WlShmPool, wl_surface::WlSurface, wl_touch::WlTouch,
+        wl_buffer::WlBuffer,
+        wl_callback::WlCallback,
+        wl_compositor::WlCompositor,
+        wl_keyboard::WlKeyboard,
+        wl_output::WlOutput,
+        wl_pointer::WlPointer,
+        wl_region::{self, WlRegion},
+        wl_seat::WlSeat,
+        wl_shm::WlShm,
+        wl_shm_pool::WlShmPool,
+        wl_surface::WlSurface,
+        wl_touch::WlTouch,
     },
     Dispatch, DisplayHandle, GlobalDispatch, Resource,
 };
@@ -114,11 +123,35 @@ impl<C: XConnection> Dispatch<WlSurface, ObjectKey> for ServerState<C> {
             Request::<WlSurface>::SetBufferScale { scale } => {
                 surface.client.set_buffer_scale(scale);
             }
+            Request::<WlSurface>::SetInputRegion { region } => {
+                let region = region.as_ref().map(|r| r.data().unwrap());
+                surface.client.set_input_region(region);
+            }
             other => warn!("unhandled surface request: {other:?}"),
         }
     }
 }
 
+impl<C: XConnection> Dispatch<WlRegion, client::wl_region::WlRegion> for ServerState<C> {
+    fn request(
+        _: &mut Self,
+        _: &wayland_server::Client,
+        _: &WlRegion,
+        request: <WlRegion as Resource>::Request,
+        client: &client::wl_region::WlRegion,
+        _: &DisplayHandle,
+        _: &mut wayland_server::DataInit<'_, Self>,
+    ) {
+        simple_event_shunt! {
+            client, request: wl_region::Request => [
+                Add { x, y, width, height },
+                Subtract { x, y, width, height },
+                Destroy
+            ]
+        }
+    }
+}
+
 impl<C: XConnection>
     Dispatch<WlCompositor, ClientGlobalWrapper<client::wl_compositor::WlCompositor>>
     for ServerState<C>
@@ -168,6 +201,10 @@ impl<C: XConnection>
                     }
                 }
             }
+            Request::<WlCompositor>::CreateRegion { id } => {
+                let c_region = client.create_region(&state.qh, ());
+                data_init.init(id, c_region);
+            }
             other => {
                 warn!("unhandled wlcompositor request: {other:?}");
             }