portal: implement window capture

src/wl_usr/usr_ifs/usr_jay_compositor.rs

@@ -10,6 +10,7 @@ use {
             usr_ifs::{
                 usr_jay_output::UsrJayOutput, usr_jay_pointer::UsrJayPointer,
                 usr_jay_render_ctx::UsrJayRenderCtx, usr_jay_screencast::UsrJayScreencast,
+                usr_jay_select_toplevel::UsrJaySelectToplevel,
                 usr_jay_workspace_watcher::UsrJayWorkspaceWatcher, usr_wl_output::UsrWlOutput,
                 usr_wl_seat::UsrWlSeat,
             },
@@ -17,13 +18,14 @@ use {
             UsrCon,
         },
     },
-    std::rc::Rc,
+    std::{cell::Cell, rc::Rc},
 };
 
 pub struct UsrJayCompositor {
     pub id: JayCompositorId,
     pub con: Rc<UsrCon>,
     pub owner: CloneCell<Option<Rc<dyn UsrJayCompositorOwner>>>,
+    pub window_capture: Cell<bool>,
 }
 
 pub trait UsrJayCompositorOwner {
@@ -112,6 +114,21 @@ impl UsrJayCompositor {
         jp
     }
 
+    pub fn select_toplevel(&self, seat: &UsrWlSeat) -> Rc<UsrJaySelectToplevel> {
+        let sc = Rc::new(UsrJaySelectToplevel {
+            id: self.con.id(),
+            con: self.con.clone(),
+            owner: Default::default(),
+        });
+        self.con.request(SelectToplevel {
+            self_id: self.id,
+            id: sc.id,
+            seat: seat.id,
+        });
+        self.con.add_object(sc.clone());
+        sc
+    }
+
     fn client_id(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
         let ev: ClientId = self.con.parse(self, parser)?;
         if let Some(owner) = self.owner.get() {
@@ -133,6 +150,7 @@ impl UsrJayCompositor {
         for &cap in ev.cap {
             match cap {
                 Cap::NONE => {}
+                Cap::WINDOW_CAPTURE => self.window_capture.set(true),
                 _ => {}
             }
         }