Merge pull request #156 from acrisci/feature/wlr-keyboard-events

[wip] wlr-seat-keyboard: keyboard events

7 files changed, 249 insertions, 58 deletions

diff --git a/examples/compositor.c b/examples/compositor.c
index 53b385b7..8154c2e3 100644
--- a/examples/compositor.c
+++ b/examples/compositor.c
@@ -128,6 +128,15 @@ static void example_set_focused_surface(struct sample_state *sample,
 		}
 	}
 
+	if (surface) {
+		// TODO: send array of currently pressed keys
+		struct wl_array keys;
+		wl_array_init(&keys);
+		wlr_seat_keyboard_enter(sample->wl_seat, surface->surface, keys);
+	} else {
+		wlr_seat_keyboard_clear_focus(sample->wl_seat);
+	}
+
 	sample->focused_surface = surface;
 }
 
@@ -332,64 +341,30 @@ static void handle_output_frame(struct output_state *output,
 }
 
 static void handle_keyboard_key(struct keyboard_state *keyboard,
-		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state) {
+		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state,
+		uint64_t time_usec) {
 	struct compositor_state *state = keyboard->compositor;
 	struct sample_state *sample = state->data;
 
-	struct wl_resource *res = NULL;
-	struct wlr_seat_handle *seat_handle = NULL;
-	wl_list_for_each(res, &sample->wlr_compositor->surfaces, link) {
-		break;
-	}
-
-	if (res) {
-		seat_handle = wlr_seat_handle_for_client(sample->wl_seat,
-			wl_resource_get_client(res));
-	}
-
-	if (res != sample->focus && seat_handle && seat_handle->keyboard) {
-		struct wl_array keys;
-		wl_array_init(&keys);
-		uint32_t serial = wl_display_next_serial(state->display);
-		wl_keyboard_send_enter(seat_handle->keyboard, serial, res, &keys);
-		sample->focus = res;
-	}
+	uint32_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
+		XKB_STATE_MODS_DEPRESSED);
+	uint32_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
+		XKB_STATE_MODS_LATCHED);
+	uint32_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
+		XKB_STATE_MODS_LOCKED);
+	uint32_t group = xkb_state_serialize_layout(keyboard->xkb_state,
+		XKB_STATE_LAYOUT_EFFECTIVE);
 
-	if (seat_handle && seat_handle->keyboard) {
-		uint32_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
-			XKB_STATE_MODS_DEPRESSED);
-		uint32_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
-			XKB_STATE_MODS_LATCHED);
-		uint32_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
-			XKB_STATE_MODS_LOCKED);
-		uint32_t group = xkb_state_serialize_layout(keyboard->xkb_state,
-			XKB_STATE_LAYOUT_EFFECTIVE);
-		uint32_t modifiers_serial = wl_display_next_serial(state->display);
-		uint32_t key_serial = wl_display_next_serial(state->display);
-		wl_keyboard_send_modifiers(seat_handle->keyboard, modifiers_serial,
-			depressed, latched, locked, group);
-		wl_keyboard_send_key(seat_handle->keyboard, key_serial, 0, keycode,
-			key_state);
-	}
+	wlr_seat_keyboard_send_modifiers(sample->wl_seat, depressed, latched,
+		locked, group);
+	wlr_seat_keyboard_send_key(sample->wl_seat, (uint32_t)time_usec, keycode,
+		key_state);
 
 	if (sym == XKB_KEY_Super_L || sym == XKB_KEY_Super_R) {
 		sample->mod_down = key_state == WLR_KEY_PRESSED;
 	}
 }
 
-static void handle_keyboard_bound(struct wl_listener *listener, void *data) {
-	struct wlr_seat_handle *handle = data;
-	struct sample_state *state =
-		wl_container_of(listener, state, keyboard_bound);
-
-	wl_keyboard_send_keymap(handle->keyboard, WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1,
-		state->keymap_fd, state->keymap_size);
-
-	if (wl_resource_get_version(handle->keyboard) >= 2) {
-		wl_keyboard_send_repeat_info(handle->keyboard, 25, 600);
-	}
-}
-
 static struct wlr_xdg_surface_v6 *example_xdg_surface_at(
 		struct sample_state *sample, int lx, int ly) {
 	struct wlr_xdg_surface_v6 *xdg_surface;
@@ -669,8 +644,6 @@ int main(int argc, char *argv[]) {
 
 	state.wl_seat = wlr_seat_create(compositor.display, "seat0");
 	assert(state.wl_seat);
-	state.keyboard_bound.notify = handle_keyboard_bound;
-	wl_signal_add(&state.wl_seat->events.keyboard_bound, &state.keyboard_bound);
 	wlr_seat_set_capabilities(state.wl_seat, WL_SEAT_CAPABILITY_KEYBOARD
 		| WL_SEAT_CAPABILITY_POINTER | WL_SEAT_CAPABILITY_TOUCH);
 
@@ -687,6 +660,10 @@ int main(int argc, char *argv[]) {
 		free(keymap);
 		break;
 	}
+
+	wlr_seat_keyboard_set_keymap(state.wl_seat, state.keymap_fd,
+		state.keymap_size);
+
 	state.xwayland = wlr_xwayland_create(compositor.display,
 		state.wlr_compositor);
 
diff --git a/examples/output-layout.c b/examples/output-layout.c
index be542630..69cb241a 100644
--- a/examples/output-layout.c
+++ b/examples/output-layout.c
@@ -157,7 +157,8 @@ static void update_velocities(struct compositor_state *state,
 }
 
 static void handle_keyboard_key(struct keyboard_state *kbstate,
-		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state) {
+		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state,
+		uint64_t time_usec) {
 	// NOTE: It may be better to simply refer to our key state during each frame
 	// and make this change in pixels/sec^2
 	// Also, key repeat
diff --git a/examples/rotation.c b/examples/rotation.c
index 2596e492..dfb81e59 100644
--- a/examples/rotation.c
+++ b/examples/rotation.c
@@ -99,7 +99,8 @@ static void update_velocities(struct compositor_state *state,
 }
 
 static void handle_keyboard_key(struct keyboard_state *kbstate,
-		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state) {
+		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state,
+		uint64_t time_usec) {
 	// NOTE: It may be better to simply refer to our key state during each frame
 	// and make this change in pixels/sec^2
 	// Also, key repeat
diff --git a/examples/shared.c b/examples/shared.c
index 0346c96d..19cf83f0 100644
--- a/examples/shared.c
+++ b/examples/shared.c
@@ -48,7 +48,8 @@ static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 					key_state == WLR_KEY_PRESSED ? "pressed" : "released");
 		}
 		if (kbstate->compositor->keyboard_key_cb) {
-			kbstate->compositor->keyboard_key_cb(kbstate, event->keycode, sym, key_state);
+			kbstate->compositor->keyboard_key_cb(kbstate, event->keycode, sym,
+				key_state, event->time_usec);
 		}
 		if (sym == XKB_KEY_Escape) {
 			wl_display_terminate(kbstate->compositor->display);
diff --git a/examples/shared.h b/examples/shared.h
index 7cf4db63..f564bffa 100644
--- a/examples/shared.h
+++ b/examples/shared.h
@@ -87,7 +87,7 @@ struct compositor_state {
 			struct output_state *s);
 	void (*keyboard_remove_cb)(struct keyboard_state *s);
 	void (*keyboard_key_cb)(struct keyboard_state *s, uint32_t keycode,
-			xkb_keysym_t sym, enum wlr_key_state key_state);
+			xkb_keysym_t sym, enum wlr_key_state key_state, uint64_t time_usec);
 	void (*pointer_motion_cb)(struct pointer_state *s,
 			double d_x, double d_y);
 	void (*pointer_motion_absolute_cb)(struct pointer_state *s,
diff --git a/include/wlr/types/wlr_seat.h b/include/wlr/types/wlr_seat.h
index e7bd82fb..0270ad4e 100644
--- a/include/wlr/types/wlr_seat.h
+++ b/include/wlr/types/wlr_seat.h
@@ -31,6 +31,18 @@ struct wlr_seat_pointer_state {
 	struct wl_listener focus_resource_destroy_listener;
 };
 
+struct wlr_seat_keyboard_state {
+	struct wlr_seat *wlr_seat;
+	struct wlr_seat_handle *focused_handle;
+	struct wlr_surface *focused_surface;
+
+	int keymap_fd;
+	size_t keymap_size;
+
+	struct wl_listener focus_surface_destroy_listener;
+	struct wl_listener focus_resource_destroy_listener;
+};
+
 struct wlr_seat {
 	struct wl_global *wl_global;
 	struct wl_display *display;
@@ -40,6 +52,7 @@ struct wlr_seat {
 	struct wlr_data_device *data_device;
 
 	struct wlr_seat_pointer_state pointer_state;
+	struct wlr_seat_keyboard_state keyboard_state;
 
 	struct {
 		struct wl_signal client_bound;
@@ -113,4 +126,38 @@ uint32_t wlr_seat_pointer_send_button(struct wlr_seat *wlr_seat, uint32_t time,
 void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
 		enum wlr_axis_orientation orientation, double value);
 
+/**
+ * Send a keyboard enter event to the given surface and consider it to be the
+ * focused surface for the keyboard. This will send a leave event to the last
+ * surface that was entered. Pass an array of currently pressed keys.
+ */
+void wlr_seat_keyboard_enter(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface, struct wl_array keys);
+
+/**
+ * Clear the focused surface for the keyboard and leave all entered surfaces.
+ */
+void wlr_seat_keyboard_clear_focus(struct wlr_seat *wlr_seat);
+
+/**
+ * Send a key event to the surface with keyboard focus. Returns the event
+ * serial.
+ */
+uint32_t wlr_seat_keyboard_send_key(struct wlr_seat *wlr_seat, uint32_t time,
+		uint32_t key, uint32_t state);
+
+/**
+ * Send the modifiers event to the surface with keyboard focus. Also sends the
+ * event to the surface with pointer focus.
+ */
+void wlr_seat_keyboard_send_modifiers(struct wlr_seat *wlr_seat,
+		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+		uint32_t group);
+
+/**
+ * Set the keymap and send it to seat keyboard resources.
+ */
+void wlr_seat_keyboard_set_keymap(struct wlr_seat *wlr_seat, int keymap_fd,
+		size_t keymap_size);
+
 #endif
diff --git a/types/wlr_seat.c b/types/wlr_seat.c
index cbf1abc7..1d544902 100644
--- a/types/wlr_seat.c
+++ b/types/wlr_seat.c
@@ -70,7 +70,7 @@ static void wl_seat_get_keyboard(struct wl_client *client,
 	}
 	if (handle->keyboard) {
 		// TODO: this is probably a protocol violation but it simplifies our
-		// code and it'd be stupid for clients to create several pointers for
+		// code and it'd be stupid for clients to create several keyboards for
 		// the same seat
 		wl_resource_destroy(handle->keyboard);
 	}
@@ -78,6 +78,20 @@ static void wl_seat_get_keyboard(struct wl_client *client,
 		wl_resource_get_version(_handle), id);
 	wl_resource_set_implementation(handle->keyboard, &wl_keyboard_impl,
 		handle, &wl_keyboard_destroy);
+
+	if (wl_resource_get_version(handle->keyboard) >=
+			WL_KEYBOARD_REPEAT_INFO_SINCE_VERSION) {
+		wl_keyboard_send_repeat_info(handle->keyboard, 25, 600);
+	}
+
+	if (handle->wlr_seat->keyboard_state.keymap_size) {
+		// TODO: handle no keymap
+		wl_keyboard_send_keymap(handle->keyboard,
+				WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1,
+				handle->wlr_seat->keyboard_state.keymap_fd,
+				handle->wlr_seat->keyboard_state.keymap_size);
+	}
+
 	wl_signal_emit(&handle->wlr_seat->events.keyboard_bound, handle);
 }
 
@@ -115,6 +129,9 @@ static void wlr_seat_handle_resource_destroy(struct wl_resource *resource) {
 	if (handle == handle->wlr_seat->pointer_state.focused_handle) {
 		handle->wlr_seat->pointer_state.focused_handle = NULL;
 	}
+	if (handle == handle->wlr_seat->keyboard_state.focused_handle) {
+		handle->wlr_seat->keyboard_state.focused_handle = NULL;
+	}
 
 	if (handle->pointer) {
 		wl_resource_destroy(handle->pointer);
@@ -168,6 +185,14 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	}
 
 	wlr_seat->pointer_state.wlr_seat = wlr_seat;
+	wl_list_init(&wlr_seat->pointer_state.focus_resource_destroy_listener.link);
+	wl_list_init(&wlr_seat->pointer_state.focus_surface_destroy_listener.link);
+
+	wlr_seat->keyboard_state.wlr_seat = wlr_seat;
+	wl_list_init(
+		&wlr_seat->keyboard_state.focus_resource_destroy_listener.link);
+	wl_list_init(
+		&wlr_seat->keyboard_state.focus_surface_destroy_listener.link);
 
 	struct wl_global *wl_global = wl_global_create(display,
 		&wl_seat_interface, 6, wlr_seat, wl_seat_bind);
@@ -184,9 +209,6 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	wl_signal_init(&wlr_seat->events.client_unbound);
 	wl_signal_init(&wlr_seat->events.keyboard_bound);
 
-	wl_list_init(&wlr_seat->pointer_state.focus_resource_destroy_listener.link);
-	wl_list_init(&wlr_seat->pointer_state.focus_surface_destroy_listener.link);
-
 	return wlr_seat;
 }
 
@@ -372,3 +394,145 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
 
 	wl_pointer_send_frame(pointer);
 }
+
+static void handle_keyboard_focus_surface_destroyed(
+		struct wl_listener *listener, void *data) {
+	struct wlr_seat_keyboard_state *state =
+		wl_container_of(listener, state, focus_surface_destroy_listener);
+
+	state->focused_surface = NULL;
+	wlr_seat_keyboard_clear_focus(state->wlr_seat);
+}
+
+static void handle_keyboard_focus_resource_destroyed(
+		struct wl_listener *listener, void *data) {
+	struct wlr_seat_keyboard_state *state =
+		wl_container_of(listener, state, focus_resource_destroy_listener);
+
+	state->focused_surface = NULL;
+	wlr_seat_keyboard_clear_focus(state->wlr_seat);
+}
+
+void wlr_seat_keyboard_enter(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface, struct wl_array keys) {
+	if (wlr_seat->keyboard_state.focused_surface == surface) {
+		// this surface already got an enter notify
+		return;
+	}
+
+	struct wlr_seat_handle *handle = NULL;
+
+	if (surface) {
+		struct wl_client *client = wl_resource_get_client(surface->resource);
+		handle = wlr_seat_handle_for_client(wlr_seat, client);
+	}
+
+	struct wlr_seat_handle *focused_handle =
+		wlr_seat->keyboard_state.focused_handle;
+	struct wlr_surface *focused_surface =
+		wlr_seat->keyboard_state.focused_surface;
+
+	// leave the previously entered surface
+	if (focused_handle && focused_handle->keyboard && focused_surface) {
+		uint32_t serial = wl_display_next_serial(wlr_seat->display);
+		wl_keyboard_send_leave(focused_handle->keyboard, serial,
+			focused_surface->resource);
+	}
+
+	// enter the current surface
+	if (handle && handle->keyboard) {
+		uint32_t serial = wl_display_next_serial(wlr_seat->display);
+		wl_keyboard_send_enter(handle->keyboard, serial,
+			surface->resource, &keys);
+
+		// TODO: send modifiers
+	}
+
+	// reinitialize the focus destroy events
+	wl_list_remove(
+		&wlr_seat->keyboard_state.focus_surface_destroy_listener.link);
+	wl_list_init(&wlr_seat->keyboard_state.focus_surface_destroy_listener.link);
+	wl_list_remove(
+		&wlr_seat->keyboard_state.focus_resource_destroy_listener.link);
+	wl_list_init(
+		&wlr_seat->keyboard_state.focus_resource_destroy_listener.link);
+	if (surface) {
+		wl_signal_add(&surface->signals.destroy,
+			&wlr_seat->keyboard_state.focus_surface_destroy_listener);
+		wl_resource_add_destroy_listener(surface->resource,
+			&wlr_seat->keyboard_state.focus_resource_destroy_listener);
+		wlr_seat->keyboard_state.focus_resource_destroy_listener.notify =
+			handle_keyboard_focus_resource_destroyed;
+		wlr_seat->keyboard_state.focus_surface_destroy_listener.notify =
+			handle_keyboard_focus_surface_destroyed;
+	}
+
+	wlr_seat->keyboard_state.focused_handle = handle;
+	wlr_seat->keyboard_state.focused_surface = surface;
+}
+
+void wlr_seat_keyboard_clear_focus(struct wlr_seat *wlr_seat) {
+	struct wl_array keys;
+	wl_array_init(&keys);
+	wlr_seat_keyboard_enter(wlr_seat, NULL, keys);
+}
+
+static bool wlr_seat_keyboard_has_focus_resource(struct wlr_seat *wlr_seat) {
+	return wlr_seat->keyboard_state.focused_handle &&
+		wlr_seat->keyboard_state.focused_handle->keyboard;
+}
+
+uint32_t wlr_seat_keyboard_send_key(struct wlr_seat *wlr_seat, uint32_t time,
+		uint32_t key, uint32_t state) {
+	if (!wlr_seat_keyboard_has_focus_resource(wlr_seat)) {
+		return 0;
+	}
+
+	uint32_t serial = wl_display_next_serial(wlr_seat->display);
+	wl_keyboard_send_key(wlr_seat->keyboard_state.focused_handle->keyboard,
+		serial, time, key, state);
+
+	return serial;
+}
+
+void wlr_seat_keyboard_send_modifiers(struct wlr_seat *wlr_seat,
+		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+		uint32_t group) {
+	uint32_t serial = 0;
+	struct wl_resource *keyboard;
+
+	if (wlr_seat_keyboard_has_focus_resource(wlr_seat)) {
+		serial = wl_display_next_serial(wlr_seat->display);
+		keyboard = wlr_seat->keyboard_state.focused_handle->keyboard;
+		wl_keyboard_send_modifiers(keyboard, serial, mods_depressed,
+			mods_latched, mods_locked, group);
+	}
+
+	if (wlr_seat_pointer_has_focus_resource(wlr_seat) &&
+			wlr_seat->pointer_state.focused_handle->keyboard &&
+			wlr_seat->pointer_state.focused_handle !=
+				wlr_seat->keyboard_state.focused_handle) {
+		if (serial == 0) {
+			serial = wl_display_next_serial(wlr_seat->display);
+		}
+		keyboard = wlr_seat->pointer_state.focused_handle->keyboard;
+
+		wl_keyboard_send_modifiers(keyboard, serial, mods_depressed,
+			mods_latched, mods_locked, group);
+	}
+}
+
+void wlr_seat_keyboard_set_keymap(struct wlr_seat *wlr_seat, int keymap_fd,
+		size_t keymap_size) {
+	// TODO: we probably should wait to send the keymap if keys are pressed
+	struct wlr_seat_handle *handle;
+	wl_list_for_each(handle, &wlr_seat->handles, link) {
+		if (handle->keyboard) {
+			wl_keyboard_send_keymap(handle->keyboard,
+				WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1, keymap_fd, keymap_size);
+		}
+	}
+
+	wlr_seat->keyboard_state.keymap_fd = keymap_fd;
+	wlr_seat->keyboard_state.keymap_size = keymap_size;
+}