Merge pull request #324 from acrisci/feature/keyboard-redesign

wlr-seat: keyboard redesign

4 files changed, 139 insertions, 125 deletions

diff --git a/include/rootston/input.h b/include/rootston/input.h
index b9af5028..5cd7509e 100644
--- a/include/rootston/input.h
+++ b/include/rootston/input.h
@@ -16,6 +16,7 @@ struct roots_keyboard {
 	struct roots_input *input;
 	struct wlr_input_device *device;
 	struct wl_listener key;
+	struct wl_listener modifiers;
 	struct wl_list link;
 
 	xkb_keysym_t pressed_keysyms[ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP];
diff --git a/include/wlr/types/wlr_seat.h b/include/wlr/types/wlr_seat.h
index f5d5c357..d241175b 100644
--- a/include/wlr/types/wlr_seat.h
+++ b/include/wlr/types/wlr_seat.h
@@ -14,7 +14,6 @@
 struct wlr_seat_handle {
 	struct wl_resource *wl_resource;
 	struct wlr_seat *wlr_seat;
-	struct wlr_seat_keyboard *seat_keyboard;
 
 	struct wl_resource *pointer;
 	struct wl_resource *keyboard;
@@ -87,21 +86,16 @@ struct wlr_seat_pointer_state {
 	struct wl_listener resource_destroy;
 };
 
-struct wlr_seat_keyboard {
-	struct wlr_seat *seat;
-	struct wlr_keyboard *keyboard;
-	struct wl_listener key;
-	struct wl_listener modifiers;
-	struct wl_listener keymap;
-	struct wl_listener destroy;
-	struct wl_list link;
-};
-
 struct wlr_seat_keyboard_state {
 	struct wlr_seat *wlr_seat;
+	struct wlr_keyboard *keyboard;
+
 	struct wlr_seat_handle *focused_handle;
 	struct wlr_surface *focused_surface;
 
+	struct wl_listener keyboard_destroy;
+	struct wl_listener keyboard_keymap;
+
 	struct wl_listener surface_destroy;
 	struct wl_listener resource_destroy;
 
@@ -113,7 +107,6 @@ struct wlr_seat {
 	struct wl_global *wl_global;
 	struct wl_display *display;
 	struct wl_list handles;
-	struct wl_list keyboards;
 	char *name;
 	uint32_t capabilities;
 
@@ -266,18 +259,9 @@ void wlr_seat_pointer_notify_axis(struct wlr_seat *wlr_seat, uint32_t time,
 		enum wlr_axis_orientation orientation, double value);
 
 /**
- * Attaches this keyboard to the seat. Key events from this keyboard will be
- * propegated to the focused client.
- */
-void wlr_seat_attach_keyboard(struct wlr_seat *seat,
-		struct wlr_input_device *dev);
-
-/**
- * Detaches this keyboard from the seat. This is done automatically when the
- * keyboard is destroyed; you only need to use this if you want to remove it for
- * some other reason.
+ * Set this keyboard as the active keyboard for the seat.
  */
-void wlr_seat_detach_keyboard(struct wlr_seat *seat, struct wlr_keyboard *kb);
+void wlr_seat_set_keyboard(struct wlr_seat *seat, struct wlr_input_device *dev);
 
 /**
  * Start a grab of the keyboard of this seat. The grabber is responsible for
@@ -294,20 +278,35 @@ void wlr_seat_keyboard_end_grab(struct wlr_seat *wlr_seat);
 
 /**
  * Send the keyboard key to focused keyboard resources. Compositors should use
- * `wlr_seat_attach_keyboard()` to automatically handle keyboard events.
+ * `wlr_seat_notify_key()` to respect keyboard grabs.
  */
 void wlr_seat_keyboard_send_key(struct wlr_seat *seat, uint32_t time,
 		uint32_t key, uint32_t state);
 
 /**
+ * Notify the seat that a key has been pressed on the keyboard. Defers to any
+ * keyboard grabs.
+ */
+void wlr_seat_keyboard_notify_key(struct wlr_seat *seat, uint32_t time,
+		uint32_t key, uint32_t state);
+
+/**
  * Send the modifier state to focused keyboard resources. Compositors should use
- * `wlr_seat_attach_keyboard()` to automatically handle keyboard events.
+ * `wlr_seat_keyboard_notify_modifiers()` to respect any keyboard grabs.
  */
 void wlr_seat_keyboard_send_modifiers(struct wlr_seat *seat,
 		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
 		uint32_t group);
 
 /**
+ * Notify the seat that the modifiers for the keyboard have changed. Defers to
+ * any keyboard grabs.
+ */
+void wlr_seat_keyboard_notify_modifiers(struct wlr_seat *seat,
+		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+		uint32_t group);
+
+/**
  * Notify the seat that the keyboard focus has changed and request it to be the
  * focused surface for this keyboard. Defers to any current grab of the seat's
  * keyboard.
diff --git a/rootston/keyboard.c b/rootston/keyboard.c
index c91c326b..a0601d05 100644
--- a/rootston/keyboard.c
+++ b/rootston/keyboard.c
@@ -55,7 +55,13 @@ static void keyboard_binding_execute(struct roots_keyboard *keyboard,
 	}
 }
 
-static void keyboard_keysym_press(struct roots_keyboard *keyboard,
+/**
+ * Process a keypress from the keyboard.
+ *
+ * Returns true if the keysym was handled by a binding and false if the event
+ * should be propagated to clients.
+ */
+static bool keyboard_keysym_press(struct roots_keyboard *keyboard,
 		xkb_keysym_t keysym) {
 	ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
 	if (i < 0) {
@@ -76,7 +82,7 @@ static void keyboard_keysym_press(struct roots_keyboard *keyboard,
 				wlr_session_change_vt(session, vt);
 			}
 		}
-		return;
+		return true;
 	}
 
 	uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
@@ -98,8 +104,11 @@ static void keyboard_keysym_press(struct roots_keyboard *keyboard,
 
 		if (ok) {
 			keyboard_binding_execute(keyboard, bc->command);
+			return true;
 		}
 	}
+
+	return false;
 }
 
 static void keyboard_keysym_release(struct roots_keyboard *keyboard,
@@ -118,13 +127,36 @@ static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	const xkb_keysym_t *syms;
 	int syms_len = xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,
 		keycode, &syms);
+
+	bool handled = false;
 	for (int i = 0; i < syms_len; i++) {
 		if (event->state == WLR_KEY_PRESSED) {
-			keyboard_keysym_press(keyboard, syms[i]);
+			bool keysym_handled = keyboard_keysym_press(keyboard, syms[i]);
+			handled = handled || keysym_handled;
 		} else { // WLR_KEY_RELEASED
 			keyboard_keysym_release(keyboard, syms[i]);
 		}
 	}
+
+	if (!handled) {
+		wlr_seat_set_keyboard(keyboard->input->wl_seat, keyboard->device);
+		wlr_seat_keyboard_notify_key(keyboard->input->wl_seat,
+			(uint32_t)(event->time_usec / 1000), event->keycode, event->state);
+	}
+}
+
+static void keyboard_modifiers_notify(struct wl_listener *listener, void *data) {
+	struct roots_keyboard *r_keyboard =
+		wl_container_of(listener, r_keyboard, modifiers);
+	struct wlr_seat *seat = r_keyboard->input->wl_seat;
+	struct wlr_keyboard *keyboard = r_keyboard->device->keyboard;
+	wlr_seat_set_keyboard(seat, r_keyboard->device);
+	wlr_seat_keyboard_notify_modifiers(seat,
+		keyboard->modifiers.depressed,
+		keyboard->modifiers.latched,
+		keyboard->modifiers.locked,
+		keyboard->modifiers.group);
+
 }
 
 static void keyboard_config_merge(struct keyboard_config *config,
@@ -157,8 +189,13 @@ void keyboard_add(struct wlr_input_device *device, struct roots_input *input) {
 	device->data = keyboard;
 	keyboard->device = device;
 	keyboard->input = input;
+
 	keyboard->key.notify = keyboard_key_notify;
 	wl_signal_add(&device->keyboard->events.key, &keyboard->key);
+
+	keyboard->modifiers.notify = keyboard_modifiers_notify;
+	wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers);
+
 	wl_list_insert(&input->keyboards, &keyboard->link);
 
 	struct keyboard_config config;
@@ -190,14 +227,12 @@ void keyboard_add(struct wlr_input_device *device, struct roots_input *input) {
 	wlr_keyboard_set_keymap(device->keyboard, xkb_map_new_from_names(context,
 		&rules, XKB_KEYMAP_COMPILE_NO_FLAGS));
 	xkb_context_unref(context);
-
-	wlr_seat_attach_keyboard(input->wl_seat, device);
 }
 
 void keyboard_remove(struct wlr_input_device *device, struct roots_input *input) {
 	struct roots_keyboard *keyboard = device->data;
-	wlr_seat_detach_keyboard(input->wl_seat, device->keyboard);
 	wl_list_remove(&keyboard->key.link);
+	wl_list_remove(&keyboard->modifiers.link);
 	wl_list_remove(&keyboard->link);
 	free(keyboard);
 }
diff --git a/types/wlr_seat.c b/types/wlr_seat.c
index 5f64bac1..a825a37f 100644
--- a/types/wlr_seat.c
+++ b/types/wlr_seat.c
@@ -92,6 +92,23 @@ static void wl_keyboard_destroy(struct wl_resource *resource) {
 	}
 }
 
+static void seat_handle_send_keymap(struct wlr_seat_handle *handle,
+		struct wlr_keyboard *keyboard) {
+	if (!keyboard || !handle->keyboard) {
+		return;
+	}
+	// TODO: We should probably lift all of the keys set by the other
+	// keyboard
+	wl_keyboard_send_keymap(handle->keyboard,
+		WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1, keyboard->keymap_fd,
+		keyboard->keymap_size);
+
+	if (wl_resource_get_version(handle->keyboard) >=
+			WL_KEYBOARD_REPEAT_INFO_SINCE_VERSION) {
+		wl_keyboard_send_repeat_info(handle->keyboard, 25, 600);
+	}
+}
+
 static void wl_seat_get_keyboard(struct wl_client *client,
 		struct wl_resource *_handle, uint32_t id) {
 	struct wlr_seat_handle *handle = wl_resource_get_user_data(_handle);
@@ -108,6 +125,11 @@ 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);
+
+	seat_handle_send_keymap(handle, handle->wlr_seat->keyboard_state.keyboard);
+
+	// TODO possibly handle the case where this keyboard needs an enter
+	// right away
 }
 
 static const struct wl_touch_interface wl_touch_impl = {
@@ -300,7 +322,6 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	wlr_seat->display = display;
 	wlr_seat->name = strdup(name);
 	wl_list_init(&wlr_seat->handles);
-	wl_list_init(&wlr_seat->keyboards);
 
 	wl_signal_init(&wlr_seat->events.client_bound);
 	wl_signal_init(&wlr_seat->events.client_unbound);
@@ -559,26 +580,6 @@ void wlr_seat_pointer_notify_axis(struct wlr_seat *wlr_seat, uint32_t time,
 	grab->interface->axis(grab, time, orientation, value);
 }
 
-static void keyboard_switch_seat_keyboard(struct wlr_seat_handle *handle,
-		struct wlr_seat_keyboard *seat_kb) {
-	if (handle->seat_keyboard == seat_kb) {
-		return;
-	}
-
-	// TODO: We should probably lift all of the keys set by the other
-	// keyboard
-	wl_keyboard_send_keymap(handle->keyboard,
-		WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1, seat_kb->keyboard->keymap_fd,
-		seat_kb->keyboard->keymap_size);
-
-	if (wl_resource_get_version(handle->keyboard) >=
-			WL_KEYBOARD_REPEAT_INFO_SINCE_VERSION) {
-		// TODO: Make this better
-		wl_keyboard_send_repeat_info(handle->keyboard, 25, 600);
-	}
-	handle->seat_keyboard = seat_kb;
-}
-
 void wlr_seat_keyboard_send_key(struct wlr_seat *wlr_seat, uint32_t time,
 		uint32_t key, uint32_t state) {
 	struct wlr_seat_handle *handle = wlr_seat->keyboard_state.focused_handle;
@@ -591,89 +592,52 @@ void wlr_seat_keyboard_send_key(struct wlr_seat *wlr_seat, uint32_t time,
 		time, key, state);
 }
 
-static void keyboard_key_notify(struct wl_listener *listener, void *data) {
-	struct wlr_seat_keyboard *seat_kb = wl_container_of(listener, seat_kb, key);
-	struct wlr_seat *seat = seat_kb->seat;
-	struct wlr_seat_handle *handle = seat->keyboard_state.focused_handle;
-	if (!handle || !handle->keyboard) {
-		return;
+static void handle_keyboard_keymap(struct wl_listener *listener, void *data) {
+	struct wlr_seat_keyboard_state *state =
+		wl_container_of(listener, state, keyboard_keymap);
+	struct wlr_seat_handle *handle;
+	wl_list_for_each(handle, &state->wlr_seat->handles, link) {
+		seat_handle_send_keymap(handle, state->keyboard);
 	}
+}
 
-	keyboard_switch_seat_keyboard(handle, seat_kb);
-
-	struct wlr_event_keyboard_key *event = data;
-	enum wlr_key_state key_state = event->state;
-
-	struct wlr_seat_keyboard_grab *grab = seat->keyboard_state.grab;
-	grab->interface->key(grab, (uint32_t)(event->time_usec / 1000),
-		event->keycode, key_state);
+static void handle_keyboard_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_seat_keyboard_state *state =
+		wl_container_of(listener, state, keyboard_destroy);
+	state->keyboard = NULL;
 }
 
-static void keyboard_modifiers_notify(struct wl_listener *listener,
-		void *data) {
-	struct wlr_seat_keyboard *seat_kb = wl_container_of(listener, seat_kb,
-		modifiers);
-	struct wlr_seat *seat = seat_kb->seat;
-	struct wlr_seat_handle *handle = seat->keyboard_state.focused_handle;
-	if (!handle || !handle->keyboard) {
+void wlr_seat_set_keyboard(struct wlr_seat *seat,
+		struct wlr_input_device *device) {
+	// TODO call this on device key event before the event reaches the
+	// compositor and set a pending keyboard and then send the new keyboard
+	// state on the next keyboard notify event.
+	if (seat->keyboard_state.keyboard == device->keyboard) {
 		return;
 	}
 
-	keyboard_switch_seat_keyboard(handle, seat_kb);
+	if (seat->keyboard_state.keyboard) {
+		wl_list_remove(&seat->keyboard_state.keyboard_destroy.link);
+		wl_list_remove(&seat->keyboard_state.keyboard_keymap.link);
+		seat->keyboard_state.keyboard = NULL;
+	}
 
-	struct wlr_keyboard *keyboard = seat_kb->keyboard;
+	if (device) {
+		assert(device->type == WLR_INPUT_DEVICE_KEYBOARD);
+		wl_signal_add(&device->events.destroy,
+			&seat->keyboard_state.keyboard_destroy);
+		seat->keyboard_state.keyboard_destroy.notify = handle_keyboard_destroy;
 
-	struct wlr_seat_keyboard_grab *grab = seat->keyboard_state.grab;
+		wl_signal_add(&device->keyboard->events.keymap,
+			&seat->keyboard_state.keyboard_keymap);
+		seat->keyboard_state.keyboard_keymap.notify = handle_keyboard_keymap;
 
-	grab->interface->modifiers(grab,
-		keyboard->modifiers.depressed, keyboard->modifiers.latched,
-		keyboard->modifiers.locked, keyboard->modifiers.group);
-}
-
-static void keyboard_keymap_notify(struct wl_listener *listener, void *data) {
-	struct wlr_seat_keyboard *seat_kb = wl_container_of(
-			listener, seat_kb, keymap);
-	wlr_log(L_DEBUG, "Keymap event for %p", seat_kb);
-}
-
-static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
-	struct wlr_seat_keyboard *seat_kb = wl_container_of(
-			listener, seat_kb, destroy);
-	wlr_seat_detach_keyboard(seat_kb->seat, seat_kb->keyboard);
-}
-
-void wlr_seat_attach_keyboard(struct wlr_seat *seat,
-		struct wlr_input_device *dev) {
-	assert(seat && dev && dev->type == WLR_INPUT_DEVICE_KEYBOARD);
-	struct wlr_keyboard *kb = dev->keyboard;
-	struct wlr_seat_keyboard *seat_kb =
-		calloc(1, sizeof(struct wlr_seat_keyboard));
-	seat_kb->keyboard = kb;
-	seat_kb->seat = seat;
-	seat_kb->key.notify = keyboard_key_notify;
-	wl_signal_add(&kb->events.key, &seat_kb->key);
-	seat_kb->modifiers.notify = keyboard_modifiers_notify;
-	wl_signal_add(&kb->events.modifiers, &seat_kb->modifiers);
-	seat_kb->keymap.notify = keyboard_keymap_notify;
-	wl_signal_add(&kb->events.keymap, &seat_kb->keymap);
-	// TODO: update keymap as necessary
-	seat_kb->destroy.notify = keyboard_destroy_notify;
-	wl_signal_add(&dev->events.destroy, &seat_kb->destroy);
-	wl_list_insert(&seat->keyboards, &seat_kb->link);
-}
-
-void wlr_seat_detach_keyboard(struct wlr_seat *seat, struct wlr_keyboard *kb) {
-	struct wlr_seat_keyboard *seat_kb, *_tmp;
-	wl_list_for_each_safe(seat_kb, _tmp, &seat->keyboards, link) {
-		if (seat_kb->keyboard == kb) {
-			wl_list_remove(&seat_kb->link);
-			wl_list_remove(&seat_kb->key.link);
-			wl_list_remove(&seat_kb->modifiers.link);
-			wl_list_remove(&seat_kb->keymap.link);
-			wl_list_remove(&seat_kb->destroy.link);
-			free(seat_kb);
-			break;
+		struct wlr_seat_handle *handle;
+		wl_list_for_each(handle, &seat->handles, link) {
+			seat_handle_send_keymap(handle, device->keyboard);
 		}
+
+		seat->keyboard_state.keyboard = device->keyboard;
 	}
 }
 
@@ -757,7 +721,8 @@ void wlr_seat_keyboard_enter(struct wlr_seat *wlr_seat,
 
 	// enter the current surface
 	if (handle && handle->keyboard) {
-		// TODO: handle keys properly
+		// TODO: read the currently pressed keys out of the active keyboard and
+		// put them in this array
 		struct wl_array keys;
 		wl_array_init(&keys);
 		uint32_t serial = wl_display_next_serial(wlr_seat->display);
@@ -797,3 +762,17 @@ void wlr_seat_keyboard_clear_focus(struct wlr_seat *wlr_seat) {
 	wl_array_init(&keys);
 	wlr_seat_keyboard_enter(wlr_seat, NULL);
 }
+
+void wlr_seat_keyboard_notify_modifiers(struct wlr_seat *seat,
+		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+		uint32_t group) {
+	struct wlr_seat_keyboard_grab *grab = seat->keyboard_state.grab;
+	grab->interface->modifiers(grab,
+		mods_depressed, mods_latched, mods_locked, group);
+}
+
+void wlr_seat_keyboard_notify_key(struct wlr_seat *seat, uint32_t time,
+		uint32_t key, uint32_t state) {
+	struct wlr_seat_keyboard_grab *grab = seat->keyboard_state.grab;
+	grab->interface->key(grab, time, key, state);
+}