api/wayland: pointer events support.

src/api/wayland/context.rs

@@ -1,6 +1,6 @@
 use Event as GlutinEvent;
 
-use std::collections::{HashMap, VecDeque};
+use std::collections::{HashMap, VecDeque, HashSet};
 use std::sync::{Arc, Mutex};
 
 use libc::c_void;
@@ -9,7 +9,7 @@ use wayland_client::{EventIterator, Proxy, ProxyId};
 use wayland_client::wayland::get_display;
 use wayland_client::wayland::compositor::{WlCompositor, WlSurface};
 use wayland_client::wayland::output::WlOutput;
-use wayland_client::wayland::seat::WlSeat;
+use wayland_client::wayland::seat::{WlSeat, WlPointer};
 use wayland_client::wayland::shell::WlShell;
 use wayland_client::wayland::shm::WlShm;
 use wayland_client::wayland::subcompositor::WlSubcompositor;
@@ -30,11 +30,20 @@ wayland_env!(InnerEnv,
     subcompositor: WlSubcompositor
 );
 
+pub struct WaylandFocuses {
+    pub pointer: Option<WlPointer>,
+    pub pointer_on: Option<ProxyId>,
+    pub pointer_at: Option<(f64, f64)>,
+    pub keyboard_on: Option<ProxyId>
+}
+
 pub struct WaylandContext {
     inner: InnerEnv,
     iterator: Mutex<EventIterator>,
     monitors: Vec<WlOutput>,
-    queues: Mutex<HashMap<ProxyId, Arc<Mutex<VecDeque<GlutinEvent>>>>>
+    queues: Mutex<HashMap<ProxyId, Arc<Mutex<VecDeque<GlutinEvent>>>>>,
+    known_surfaces: Mutex<HashSet<ProxyId>>,
+    focuses: Mutex<WaylandFocuses>
 }
 
 impl WaylandContext {
@@ -57,7 +66,14 @@ impl WaylandContext {
             inner: inner_env,
             iterator: Mutex::new(iterator),
             monitors: monitors,
-            queues: Mutex::new(HashMap::new())
+            queues: Mutex::new(HashMap::new()),
+            known_surfaces: Mutex::new(HashSet::new()),
+            focuses: Mutex::new(WaylandFocuses {
+                pointer: None,
+                pointer_on: None,
+                pointer_at: None,
+                keyboard_on: None
+            })
         })
     }
 
@@ -71,12 +87,14 @@ impl WaylandContext {
                 Arc::new(Mutex::new(q))
             };
             self.queues.lock().unwrap().insert(id, queue.clone());
+            self.known_surfaces.lock().unwrap().insert(id);
             (s, queue)
         })
     }
 
     pub fn dropped_surface(&self, id: ProxyId) {
         self.queues.lock().unwrap().remove(&id);
+        self.known_surfaces.lock().unwrap().remove(&id);
     }
 
     pub fn decorated_from(&self, surface: &WlSurface, width: i32, height: i32) -> Option<DecoratedSurface> {
@@ -100,9 +118,14 @@ impl WaylandContext {
     pub fn dispatch_events(&self) {
         self.inner.display.dispatch_pending().unwrap();
         let mut iterator = self.iterator.lock().unwrap();
+        let mut focuses = self.focuses.lock().unwrap();
+        let known_ids = self.known_surfaces.lock().unwrap();
         let queues = self.queues.lock().unwrap();
         for evt in &mut *iterator {
-            if let Some((evt, id)) = super::events::translate_event(evt) {
+            if let Some((evt, id)) = super::events::translate_event(
+                evt, &mut *focuses, &known_ids,
+                self.inner.seat.as_ref().map(|s| &s.0))
+            {
                 if let Some(q) = queues.get(&id) {
                     q.lock().unwrap().push_back(evt);
                 }

src/api/wayland/events.rs

@@ -1,10 +1,97 @@
+use std::collections::HashSet;
+
 use Event as GlutinEvent;
+use ElementState;
+use MouseButton;
+use MouseScrollDelta;
 
 use wayland_client::Event as WaylandEvent;
 use wayland_client::ProxyId;
+use wayland_client::wayland::WaylandProtocolEvent as WPE;
+use wayland_client::wayland::seat::{WlSeat, WlSeatEvent, WlPointerEvent,
+                                    WlPointerButtonState,
+                                    WlPointerAxis, WlSeatCapability};
 
-pub fn translate_event(evt: WaylandEvent) -> Option<(GlutinEvent, ProxyId)> {
-    match evt {
+use super::context::WaylandFocuses;
+
+pub fn translate_event(
+    evt: WaylandEvent,
+    focuses: &mut WaylandFocuses,
+    known_surfaces: &HashSet<ProxyId>,
+    seat: Option<&WlSeat>,
+) -> Option<(GlutinEvent, ProxyId)> {
+    let WaylandEvent::Wayland(wayland_evt) = evt;
+    match wayland_evt {
+        WPE::WlSeat(_, seat_evt) => match seat_evt {
+            WlSeatEvent::Capabilities(cap) => {
+                if cap.contains(WlSeatCapability::Pointer) && focuses.pointer.is_none() {
+                    if let Some(seat) = seat {
+                        focuses.pointer = Some(seat.get_pointer());
+                    }
+                }
+                None
+            },
+            _ => None
+        },
+        WPE::WlPointer(_, pointer_evt) => match pointer_evt {
+            WlPointerEvent::Enter(_, surface, x, y) => {
+                if known_surfaces.contains(&surface) {
+                    focuses.pointer_on = Some(surface);
+                    focuses.pointer_at = Some((x, y));
+                    Some((GlutinEvent::MouseMoved((x as i32, y as i32)), surface))
+                } else {
+                    None
+                }
+            }
+            WlPointerEvent::Leave(_, _) => {
+                focuses.pointer_on = None;
+                focuses.pointer_at = None;
+                None
+            }
+            WlPointerEvent::Motion(_, x, y) => {
+                if let Some(surface) = focuses.pointer_on {
+                    focuses.pointer_at = Some((x, y));
+                    Some((GlutinEvent::MouseMoved((x as i32, y as i32)), surface))
+                } else {
+                    None
+                }
+            }
+            WlPointerEvent::Button(_, _, button, state) => {
+                if let Some(surface) = focuses.pointer_on {
+                    Some((GlutinEvent::MouseInput(
+                        match state {
+                            WlPointerButtonState::Pressed => ElementState::Pressed,
+                            WlPointerButtonState::Released => ElementState::Released
+                        },
+                        match button {
+                            0x110 => MouseButton::Left,
+                            0x111 => MouseButton::Right,
+                            0x112 => MouseButton::Middle,
+                            // TODO figure out the translation ?
+                            _ => return None
+                        }
+                    ), surface))
+                } else {
+                    None
+                }
+            }
+            WlPointerEvent::Axis(_, axis, amplitude) => {
+                if let Some(surface) = focuses.pointer_on {
+                    Some((GlutinEvent::MouseWheel(
+                        match axis {
+                            WlPointerAxis::VerticalScroll => {
+                                MouseScrollDelta::PixelDelta(amplitude as f32, 0.0)
+                            }
+                            WlPointerAxis::HorizontalScroll => {
+                                MouseScrollDelta::PixelDelta(0.0, amplitude as f32)
+                            }
+                        }
+                    ), surface))
+                } else {
+                    None
+                }
+            }
+        },
         _ => None
     }
 }

src/api/wayland/window.rs

@@ -225,12 +225,12 @@ impl Window {
     }
 
     #[inline]
-    pub fn set_cursor(&self, cursor: MouseCursor) {
+    pub fn set_cursor(&self, _cursor: MouseCursor) {
         // TODO
     }
 
     #[inline]
-    pub fn set_cursor_state(&self, state: CursorState) -> Result<(), String> {
+    pub fn set_cursor_state(&self, _state: CursorState) -> Result<(), String> {
         // TODO
         Ok(())
     }