head-management: add tearing-state-v1 extension

src/ifs/head_management.rs

@@ -80,6 +80,8 @@ pub struct HeadState {
     pub inherent_non_desktop: bool,
     pub override_non_desktop: Option<bool>,
     pub vrr: bool,
+    pub tearing_enabled: bool,
+    pub tearing_active: bool,
 }
 
 impl HeadState {
@@ -380,4 +382,28 @@ impl HeadManagers {
             }
         }
     }
+
+    pub fn handle_tearing_enabled_change(&self, enabled: bool) {
+        let state = &mut *self.state.borrow_mut();
+        state.tearing_enabled = enabled;
+        for head in self.managers.lock().values() {
+            skip_in_transaction!(head);
+            if let Some(ext) = &head.ext.tearing_state_v1 {
+                ext.send_enabled(state);
+                head.session.schedule_done();
+            }
+        }
+    }
+
+    pub fn handle_tearing_active_change(&self, active: bool) {
+        let state = &mut *self.state.borrow_mut();
+        state.tearing_active = active;
+        for head in self.managers.lock().values() {
+            skip_in_transaction!(head);
+            if let Some(ext) = &head.ext.tearing_state_v1 {
+                ext.send_active(state);
+                head.session.schedule_done();
+            }
+        }
+    }
 }

src/ifs/head_management/head_management_macros.rs

@@ -400,4 +400,5 @@ declare_extensions! {
     physical_display_info_v1: PhysicalDisplayInfoV1,
     non_desktop_info_v1: NonDesktopInfoV1,
     vrr_state_v1: VrrStateV1,
+    tearing_state_v1: TearingStateV1,
 }

src/ifs/head_management/jay_head_ext.rs

@@ -9,4 +9,5 @@ pub(super) mod jay_head_ext_mode_info_v1;
 pub(super) mod jay_head_ext_mode_setter_v1;
 pub(super) mod jay_head_ext_non_desktop_info_v1;
 pub(super) mod jay_head_ext_physical_display_info_v1;
+pub(super) mod jay_head_ext_tearing_state_v1;
 pub(super) mod jay_head_ext_vrr_state_v1;

src/ifs/head_management/jay_head_ext/jay_head_ext_tearing_state_v1.rs

@@ -0,0 +1,64 @@
+use {
+    crate::{
+        ifs::head_management::HeadState,
+        wire::{
+            jay_head_ext_tearing_state_v1::{
+                Active, Disabled, Enabled, Inactive, JayHeadExtTearingStateV1RequestHandler,
+            },
+            jay_head_manager_ext_tearing_state_v1::JayHeadManagerExtTearingStateV1RequestHandler,
+        },
+    },
+    std::rc::Rc,
+};
+
+impl_tearing_state_v1! {
+    version = 1,
+    after_announce = after_announce,
+    after_transaction = after_transaction,
+}
+
+impl HeadName {
+    fn after_announce(&self, shared: &HeadState) {
+        self.send_enabled(shared);
+        self.send_active(shared);
+    }
+
+    fn after_transaction(&self, shared: &HeadState, tran: &HeadState) {
+        if shared.tearing_enabled != tran.tearing_enabled {
+            self.send_enabled(shared);
+        }
+        if shared.tearing_active != tran.tearing_active {
+            self.send_active(shared);
+        }
+    }
+
+    pub(in super::super) fn send_enabled(&self, state: &HeadState) {
+        if state.tearing_enabled {
+            self.client.event(Enabled { self_id: self.id });
+        } else {
+            self.client.event(Disabled { self_id: self.id });
+        }
+    }
+
+    pub(in super::super) fn send_active(&self, state: &HeadState) {
+        if state.tearing_active {
+            self.client.event(Active { self_id: self.id });
+        } else {
+            self.client.event(Inactive { self_id: self.id });
+        }
+    }
+}
+
+impl JayHeadManagerExtTearingStateV1RequestHandler for MgrName {
+    type Error = ErrorName;
+
+    mgr_common_req!();
+}
+
+impl JayHeadExtTearingStateV1RequestHandler for HeadName {
+    type Error = ErrorName;
+
+    head_common_req!();
+}
+
+error!();