Always give keyboard focus to the topmost layer

examples/layer-shell.c

@@ -17,7 +17,7 @@ static struct wl_compositor *compositor = NULL;
 static struct wl_seat *seat = NULL;
 static struct wl_shm *shm = NULL;
 static struct wl_pointer *pointer = NULL;
-//static struct wl_keyboard *keyboard = NULL;
+static struct wl_keyboard *keyboard = NULL;
 static struct zwlr_layer_shell_v1 *layer_shell = NULL;
 struct zwlr_layer_surface_v1 *layer_surface;
 static struct wl_output *wl_output = NULL;
@@ -212,6 +212,46 @@ struct wl_pointer_listener pointer_listener = {
 	.axis_discrete = wl_pointer_axis_discrete,
 };
 
+static void wl_keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t format, int32_t fd, uint32_t size) {
+	// Who cares
+}
+
+static void wl_keyboard_enter(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, struct wl_surface *surface, struct wl_array *keys) {
+	wlr_log(L_DEBUG, "Keyboard enter");
+}
+
+static void wl_keyboard_leave(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, struct wl_surface *surface) {
+	wlr_log(L_DEBUG, "Keyboard leave");
+}
+
+static void wl_keyboard_key(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, uint32_t time, uint32_t key, uint32_t state) {
+	wlr_log(L_DEBUG, "Key event: %d %d", key, state);
+}
+
+static void wl_keyboard_modifiers(void *data, struct wl_keyboard *wl_keyboard,
+		uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched,
+		uint32_t mods_locked, uint32_t group) {
+	// Who cares
+}
+
+static void wl_keyboard_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
+		int32_t rate, int32_t delay) {
+	// Who cares
+}
+
+static struct wl_keyboard_listener keyboard_listener = {
+	.keymap = wl_keyboard_keymap,
+	.enter = wl_keyboard_enter,
+	.leave = wl_keyboard_leave,
+	.key = wl_keyboard_key,
+	.modifiers = wl_keyboard_modifiers,
+	.repeat_info = wl_keyboard_repeat_info,
+};
+
 static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
 		enum wl_seat_capability caps) {
 	if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
@@ -219,7 +259,8 @@ static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
 		wl_pointer_add_listener(pointer, &pointer_listener, NULL);
 	}
 	if ((caps & WL_SEAT_CAPABILITY_KEYBOARD)) {
-		// TODO
+		keyboard = wl_seat_get_keyboard(wl_seat);
+		wl_keyboard_add_listener(keyboard, &keyboard_listener, NULL);
 	}
 }
 

include/rootston/seat.h

@@ -4,6 +4,7 @@
 #include <wayland-server.h>
 #include "rootston/input.h"
 #include "rootston/keyboard.h"
+#include "rootston/layers.h"
 
 struct roots_seat {
 	struct roots_input *input;
@@ -15,6 +16,9 @@ struct roots_seat {
 	int32_t touch_id;
 	double touch_x, touch_y;
 
+	// If the focused layer is set, views cannot receive keyboard focus
+	struct roots_layer_surface *focused_layer;
+
 	struct wl_list views; // roots_seat_view::link
 	bool has_focus;
 
@@ -100,6 +104,9 @@ struct roots_view *roots_seat_get_focus(struct roots_seat *seat);
 
 void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view);
 
+void roots_seat_set_focus_layer(struct roots_seat *seat,
+		struct roots_layer_surface *layer);
+
 void roots_seat_cycle_focus(struct roots_seat *seat);
 
 void roots_seat_begin_move(struct roots_seat *seat, struct roots_view *view);

rootston/layer_shell.c

@@ -214,7 +214,12 @@ void arrange_layers(struct roots_output *output) {
 			break;
 		}
 	}
-	wlr_log(L_DEBUG, "topmost interactive layer: %p", topmost);
+
+	struct roots_input *input = output->desktop->server->input;
+	struct roots_seat *seat;
+	wl_list_for_each(seat, &input->seats, link) {
+		roots_seat_set_focus_layer(seat, topmost);
+	}
 }
 
 static void handle_output_destroy(struct wl_listener *listener, void *data) {

rootston/seat.c

@@ -4,6 +4,7 @@
 #include <wayland-server.h>
 #include <wlr/config.h>
 #include <wlr/types/wlr_idle.h>
+#include <wlr/types/wlr_layer_shell.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/util/log.h>
 #include "rootston/cursor.h"
@@ -723,7 +724,6 @@ void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
 		wl_list_insert(&seat->input->server->desktop->views, &view->link);
 	}
 
-
 	bool unfullscreen = true;
 
 #ifdef WLR_HAS_XWAYLAND
@@ -781,14 +781,18 @@ void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
 		return;
 	}
 
-	view_activate(view, true);
-
-	seat->has_focus = true;
 	wl_list_remove(&seat_view->link);
 	wl_list_insert(&seat->views, &seat_view->link);
 
 	view_damage_whole(view);
 
+	if (seat->focused_layer) {
+		return;
+	}
+
+	view_activate(view, true);
+	seat->has_focus = true;
+
 	struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->seat);
 	if (keyboard != NULL) {
 		wlr_seat_keyboard_notify_enter(seat->seat, view->wlr_surface,
@@ -800,6 +804,30 @@ void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
 	}
 }
 
+void roots_seat_set_focus_layer(struct roots_seat *seat,
+		struct roots_layer_surface *layer) {
+	struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->seat);
+	seat->focused_layer = layer;
+	if (!layer) {
+		wlr_seat_keyboard_clear_focus(seat->seat);
+		return;
+	}
+	if (seat->has_focus) {
+		struct roots_view *prev_focus = roots_seat_get_focus(seat);
+		view_activate(prev_focus, false);
+	}
+	seat->has_focus = false;
+	struct wlr_layer_surface *layer_surface = layer->layer_surface;
+	if (keyboard != NULL) {
+		wlr_seat_keyboard_notify_enter(seat->seat, layer_surface->surface,
+			keyboard->keycodes, keyboard->num_keycodes,
+			&keyboard->modifiers);
+	} else {
+		wlr_seat_keyboard_notify_enter(seat->seat, layer_surface->surface,
+			NULL, 0, NULL);
+	}
+}
+
 void roots_seat_cycle_focus(struct roots_seat *seat) {
 	if (wl_list_empty(&seat->views)) {
 		return;
@@ -826,6 +854,7 @@ void roots_seat_cycle_focus(struct roots_seat *seat) {
 }
 
 void roots_seat_begin_move(struct roots_seat *seat, struct roots_view *view) {
+	wlr_log(L_DEBUG, "begin move");
 	struct roots_cursor *cursor = seat->cursor;
 	cursor->mode = ROOTS_CURSOR_MOVE;
 	cursor->offs_x = cursor->cursor->x;