wayland: Window controls and drag (#11525)

Based on https://github.com/zed-industries/zed/pull/11046

- Partially fixes #10346 
- Fixes https://github.com/zed-industries/zed/issues/9964

## Features
Window buttons

![image](https://github.com/zed-industries/zed/assets/71973804/1b7e0504-3925-45ba-90b5-5adb55e0d739)

Window drag

![image](https://github.com/zed-industries/zed/assets/71973804/9c509a37-e5a5-484c-9f80-c722aeee4380)

Native window context menu

![image](https://github.com/zed-industries/zed/assets/71973804/048ecf52-e277-49bb-a106-91cad226fd8a)

### Limitations

- No resizing
- Wayland only (though X11 always has window decorations)

### Technical

This PR adds three APIs to gpui.

1. `show_window_menu`: Triggers the native title bar context menu.
2. `start_system_move`: Tells the compositor to start dragging the
window.
3. `should_render_window_controls`: Whether the compositor doesn't
support server side decorations.

These APIs have only been implemented for Wayland, but they should be
portable to other platforms.

Release Notes:

- N/A

---------

Co-authored-by: Akilan Elango <akilan1997@gmail.com>

crates/gpui/src/platform/linux/wayland/client.rs

@@ -23,6 +23,7 @@ use wayland_client::globals::{registry_queue_init, GlobalList, GlobalListContent
 use wayland_client::protocol::wl_callback::{self, WlCallback};
 use wayland_client::protocol::wl_data_device_manager::DndAction;
 use wayland_client::protocol::wl_pointer::{AxisRelativeDirection, AxisSource};
+use wayland_client::protocol::wl_seat::WlSeat;
 use wayland_client::protocol::{
     wl_data_device, wl_data_device_manager, wl_data_offer, wl_data_source, wl_output, wl_region,
 };
@@ -80,6 +81,7 @@ pub struct Globals {
     pub data_device_manager: Option<wl_data_device_manager::WlDataDeviceManager>,
     pub wm_base: xdg_wm_base::XdgWmBase,
     pub shm: wl_shm::WlShm,
+    pub seat: wl_seat::WlSeat,
     pub viewporter: Option<wp_viewporter::WpViewporter>,
     pub fractional_scale_manager:
         Option<wp_fractional_scale_manager_v1::WpFractionalScaleManagerV1>,
@@ -93,6 +95,7 @@ impl Globals {
         globals: GlobalList,
         executor: ForegroundExecutor,
         qh: QueueHandle<WaylandClientStatePtr>,
+        seat: wl_seat::WlSeat,
     ) -> Self {
         Globals {
             activation: globals.bind(&qh, 1..=1, ()).ok(),
@@ -113,6 +116,7 @@ impl Globals {
                 )
                 .ok(),
             shm: globals.bind(&qh, 1..=1, ()).unwrap(),
+            seat,
             wm_base: globals.bind(&qh, 1..=1, ()).unwrap(),
             viewporter: globals.bind(&qh, 1..=1, ()).ok(),
             fractional_scale_manager: globals.bind(&qh, 1..=1, ()).ok(),
@@ -193,6 +197,10 @@ impl WaylandClientStatePtr {
             .expect("The pointer should always be valid when dispatching in wayland")
     }
 
+    pub fn get_serial(&self, kind: SerialKind) -> u32 {
+        self.0.upgrade().unwrap().borrow().serial_tracker.get(kind)
+    }
+
     pub fn drop_window(&self, surface_id: &ObjectId) {
         let mut client = self.get_client();
         let mut state = client.borrow_mut();
@@ -303,7 +311,12 @@ impl WaylandClient {
         });
 
         let seat = seat.unwrap();
-        let globals = Globals::new(globals, common.foreground_executor.clone(), qh.clone());
+        let globals = Globals::new(
+            globals,
+            common.foreground_executor.clone(),
+            qh.clone(),
+            seat.clone(),
+        );
 
         let data_device = globals
             .data_device_manager
@@ -962,6 +975,7 @@ impl Dispatch<wl_pointer::WlPointer, ()> for WaylandClientStatePtr {
             } => {
                 state.serial_tracker.update(SerialKind::MouseEnter, serial);
                 state.mouse_location = Some(point(px(surface_x as f32), px(surface_y as f32)));
+                state.button_pressed = None;
 
                 if let Some(window) = get_window(&mut state, &surface.id()) {
                     state.mouse_focused_window = Some(window.clone());
@@ -990,6 +1004,7 @@ impl Dispatch<wl_pointer::WlPointer, ()> for WaylandClientStatePtr {
                     });
                     state.mouse_focused_window = None;
                     state.mouse_location = None;
+                    state.button_pressed = None;
 
                     drop(state);
                     focused_window.handle_input(input);