From 56078edd65d05c1db1aa5d6e72134499e907063d Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Mon, 2 Apr 2018 21:07:46 -0400
Subject: [PATCH] Give exclusive focus to layers above shell layer

---
 include/sway/input/seat.h  |  7 +++++++
 sway/desktop/layer_shell.c |  7 ++++++-
 sway/input/seat.c          | 36 +++++++++++++++++++++++++++++++++++-
 3 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index c780a52b6..137fcd229 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -1,6 +1,7 @@
 #ifndef _SWAY_INPUT_SEAT_H
 #define _SWAY_INPUT_SEAT_H
 
+#include <wlr/types/wlr_layer_shell.h>
 #include <wlr/types/wlr_seat.h>
 #include "sway/input/input-manager.h"
 
@@ -28,6 +29,9 @@ struct sway_seat {
 	bool has_focus;
 	struct wl_list focus_stack; // list of containers in focus order
 
+	// If the focused layer is set, views cannot receive keyboard focus
+	struct wlr_layer_surface *focused_layer;
+
 	struct wl_listener focus_destroy;
 	struct wl_listener new_container;
 
@@ -57,6 +61,9 @@ void seat_set_focus(struct sway_seat *seat, struct sway_container *container);
 void seat_set_focus_warp(struct sway_seat *seat,
 		struct sway_container *container, bool warp);
 
+void seat_set_focus_layer(struct sway_seat *seat,
+		struct wlr_layer_surface *layer);
+
 struct sway_container *seat_get_focus(struct sway_seat *seat);
 
 /**
diff --git a/sway/desktop/layer_shell.c b/sway/desktop/layer_shell.c
index a187432bd..3c7b45f72 100644
--- a/sway/desktop/layer_shell.c
+++ b/sway/desktop/layer_shell.c
@@ -7,6 +7,8 @@
 #include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/util/log.h>
+#include "sway/input/input-manager.h"
+#include "sway/input/seat.h"
 #include "sway/layers.h"
 #include "sway/output.h"
 #include "sway/server.h"
@@ -208,7 +210,10 @@ void arrange_layers(struct sway_output *output) {
 		}
 	}
 
-	wlr_log(L_DEBUG, "topmost layer: %p", topmost);
+	struct sway_seat *seat;
+	wl_list_for_each(seat, &input_manager->seats, link) {
+		seat_set_focus_layer(seat, topmost ? topmost->layer_surface : NULL);
+	}
 }
 
 static void handle_output_destroy(struct wl_listener *listener, void *data) {
diff --git a/sway/input/seat.c b/sway/input/seat.c
index c41f7b2e8..cf519a824 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -352,8 +352,11 @@ void seat_configure_xcursor(struct sway_seat *seat) {
 
 void seat_set_focus_warp(struct sway_seat *seat,
 		struct sway_container *container, bool warp) {
-	struct sway_container *last_focus = seat_get_focus(seat);
+	if (seat->focused_layer) {
+		return;
+	}
 
+	struct sway_container *last_focus = seat_get_focus(seat);
 	if (container && last_focus == container) {
 		return;
 	}
@@ -419,6 +422,37 @@ void seat_set_focus(struct sway_seat *seat,
 	seat_set_focus_warp(seat, container, true);
 }
 
+void seat_set_focus_layer(struct sway_seat *seat,
+		struct wlr_layer_surface *layer) {
+	if (!layer) {
+		seat->focused_layer = NULL;
+		return;
+	}
+	if (seat->focused_layer == layer) {
+		return;
+	}
+	if (seat->has_focus) {
+		struct sway_container *focus = seat_get_focus(seat);
+		if (focus->type == C_VIEW) {
+			wlr_seat_keyboard_clear_focus(seat->wlr_seat);
+			view_set_activated(focus->sway_view, false);
+		}
+	}
+	if (layer->layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
+		seat->focused_layer = layer;
+	}
+	struct wlr_keyboard *keyboard =
+		wlr_seat_get_keyboard(seat->wlr_seat);
+	if (keyboard) {
+		wlr_seat_keyboard_notify_enter(seat->wlr_seat,
+				layer->surface, keyboard->keycodes,
+				keyboard->num_keycodes, &keyboard->modifiers);
+	} else {
+		wlr_seat_keyboard_notify_enter(seat->wlr_seat,
+				layer->surface, NULL, 0, NULL);
+	}
+}
+
 struct sway_container *seat_get_focus_inactive(struct sway_seat *seat,
 		struct sway_container *container) {
 	return seat_get_focus_by_type(seat, container, C_TYPES);