Add support for wlr-layer-shell ON_DEMAND keyboard interactivity

This allows for layer shell surfaces to receive focus while the surface is explicitly focused, i.e allowing
text fields to receive keyboard input just like a regular surface.

2 files changed, 35 insertions, 9 deletions

diff --git a/sway/input/seat.c b/sway/input/seat.c
index 5795f40f..fdd21057 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -1295,11 +1295,15 @@ static void seat_set_workspace_focus(struct sway_seat *seat, struct sway_node *n
 }
 
 void seat_set_focus(struct sway_seat *seat, struct sway_node *node) {
-        if (seat->focused_layer) {
+        // Prevents the layer from losing focus if it has keyboard exclusivity
+        if (seat->has_exclusive_layer) {
                 struct wlr_layer_surface_v1 *layer = seat->focused_layer;
                 seat_set_focus_layer(seat, NULL);
                 seat_set_workspace_focus(seat, node);
                 seat_set_focus_layer(seat, layer);
+        } else if (seat->focused_layer) {
+                seat_set_focus_layer(seat, NULL);
+                seat_set_workspace_focus(seat, node);
         } else {
                 seat_set_workspace_focus(seat, node);
         }
@@ -1347,14 +1351,20 @@ void seat_set_focus_layer(struct sway_seat *seat,
                         seat_set_focus(seat, previous);
                 }
                 return;
-        } else if (!layer || seat->focused_layer == layer) {
+        } else if (!layer) {
                 return;
         }
         assert(layer->surface->mapped);
-        seat_set_focus_surface(seat, layer->surface, true);
-        if (layer->current.layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
-                seat->focused_layer = layer;
+        if (layer->current.layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP &&
+                        layer->current.keyboard_interactive
+                        == ZWLR_LAYER_SURFACE_V1_KEYBOARD_INTERACTIVITY_EXCLUSIVE) {
+                seat->has_exclusive_layer = true;
+        }
+        if (seat->focused_layer == layer) {
+                return;
         }
+        seat_set_focus_surface(seat, layer->surface, true);
+        seat->focused_layer = layer;
 }
 
 void seat_set_exclusive_client(struct sway_seat *seat,
diff --git a/sway/input/seatop_default.c b/sway/input/seatop_default.c
index 5a55c186..f4c63808 100644
--- a/sway/input/seatop_default.c
+++ b/sway/input/seatop_default.c
@@ -2,6 +2,7 @@
 #include <float.h>
 #include <libevdev/libevdev.h>
 #include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_subcompositor.h>
 #include <wlr/types/wlr_tablet_v2.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include "gesture.h"
@@ -9,6 +10,7 @@
 #include "sway/input/cursor.h"
 #include "sway/input/seat.h"
 #include "sway/input/tablet.h"
+#include "sway/layers.h"
 #include "sway/output.h"
 #include "sway/tree/view.h"
 #include "sway/tree/workspace.h"
@@ -365,10 +367,9 @@ static void handle_button(struct sway_seat *seat, uint32_t time_msec,
                 return;
         }
 
-        // Handle clicking a layer surface
-        struct wlr_layer_surface_v1 *layer;
-        if (surface &&
-                        (layer = wlr_layer_surface_v1_try_from_wlr_surface(surface))) {
+        // Handle clicking a layer surface and its popups/subsurfaces
+        struct wlr_layer_surface_v1 *layer = NULL;
+        if ((layer = toplevel_layer_surface_from_surface(surface))) {
                 if (layer->current.keyboard_interactive) {
                         seat_set_focus_layer(seat, layer);
                         transaction_commit_dirty();
@@ -544,6 +545,21 @@ static void check_focus_follows_mouse(struct sway_seat *seat,
                 if (wlr_output == NULL) {
                         return;
                 }
+
+                struct wlr_surface *surface = NULL;
+                double sx, sy;
+                node_at_coords(seat, seat->cursor->cursor->x, seat->cursor->cursor->y,
+                                &surface, &sx, &sy);
+
+                // Focus topmost layer surface
+                struct wlr_layer_surface_v1 *layer = NULL;
+                if ((layer = toplevel_layer_surface_from_surface(surface)) &&
+                                layer->current.keyboard_interactive) {
+                        seat_set_focus_layer(seat, layer);
+                        transaction_commit_dirty();
+                        return;
+                }
+
                 struct sway_output *hovered_output = wlr_output->data;
                 if (focus && hovered_output != node_get_output(focus)) {
                         struct sway_workspace *ws = output_get_active_workspace(hovered_output);