7 files changed, 90 insertions, 4 deletions

diff --git a/include/sway/container.h b/include/sway/container.h
index 0e1cc8a3..f13745ee 100644
--- a/include/sway/container.h
+++ b/include/sway/container.h
@@ -124,6 +124,10 @@ struct sway_container {
          * Marks applied to the container, list_t of char*.
          */
         list_t *marks;
+
+        struct {
+                struct wl_signal destroy;
+        } events;
 };
 
 void swayc_descendants_of_type(swayc_t *root, enum swayc_types type,
diff --git a/include/sway/input/input-manager.h b/include/sway/input/input-manager.h
index 5dc75ba7..9548c170 100644
--- a/include/sway/input/input-manager.h
+++ b/include/sway/input/input-manager.h
@@ -19,4 +19,7 @@ char* libinput_dev_unique_id(struct libinput_device *dev);
 struct sway_input_manager *sway_input_manager_create(
                 struct sway_server *server);
 
+bool sway_input_manager_swayc_has_focus(struct sway_input_manager *input,
+                swayc_t *container);
+
 #endif
diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index f7f8a1bb..964c0f7b 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -7,9 +7,13 @@
 struct sway_seat {
         struct wlr_seat *seat;
         struct sway_cursor *cursor;
+        struct sway_input_manager *input;
+        swayc_t *focus;
+
+        struct wl_listener focus_destroy;
 };
 
-struct sway_seat *sway_seat_create(struct wl_display *display,
+struct sway_seat *sway_seat_create(struct sway_input_manager *input,
                 const char *seat_name);
 
 void sway_seat_add_device(struct sway_seat *seat,
@@ -20,4 +24,6 @@ void sway_seat_remove_device(struct sway_seat *seat,
 
 void sway_seat_configure_xcursor(struct sway_seat *seat);
 
+void sway_seat_set_focus(struct sway_seat *seat, swayc_t *container);
+
 #endif
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 5f2d650e..217c2ddb 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -1,4 +1,9 @@
 #define _XOPEN_SOURCE 700
+#ifdef __linux__
+#include <linux/input-event-codes.h>
+#elif __FreeBSD__
+#include <dev/evdev/input-event-codes.h>
+#endif
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include "sway/input/cursor.h"
@@ -57,6 +62,16 @@ static void handle_cursor_button(struct wl_listener *listener, void *data) {
         struct sway_cursor *cursor =
                 wl_container_of(listener, cursor, button);
         struct wlr_event_pointer_button *event = data;
+
+        if (event->button == BTN_LEFT) {
+                struct wlr_surface *surface = NULL;
+                double sx, sy;
+                swayc_t *swayc =
+                        swayc_at(&root_container, cursor->x, cursor->y, &surface, &sx, &sy);
+
+                sway_seat_set_focus(cursor->seat, swayc);
+        }
+
         wlr_seat_pointer_notify_button(cursor->seat->seat, event->time_msec,
                 event->button, event->state);
 }
diff --git a/sway/input/input-manager.c b/sway/input/input-manager.c
index 4f52e59a..ca80f267 100644
--- a/sway/input/input-manager.c
+++ b/sway/input/input-manager.c
@@ -27,7 +27,7 @@ static struct sway_seat *input_manager_get_seat(
                 }
         }
 
-        seat = sway_seat_create(input->server->wl_display, seat_name);
+        seat = sway_seat_create(input, seat_name);
         list_add(input->seats, seat);
 
         return seat;
@@ -131,3 +131,15 @@ char *libinput_dev_unique_id(struct libinput_device *device) {
         free(name);
         return identifier;
 }
+
+bool sway_input_manager_swayc_has_focus(struct sway_input_manager *input,
+                swayc_t *container) {
+        for (int i = 0; i < input->seats->length; ++i) {
+                struct sway_seat *seat = input->seats->items[i];
+                if (seat->focus == container) {
+                        return true;
+                }
+        }
+
+        return false;
+}
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 5aed1f68..94f547cc 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -5,16 +5,17 @@
 #include "sway/input/cursor.h"
 #include "sway/input/input-manager.h"
 #include "sway/output.h"
+#include "sway/view.h"
 #include "log.h"
 
-struct sway_seat *sway_seat_create(struct wl_display *display,
+struct sway_seat *sway_seat_create(struct sway_input_manager *input,
                 const char *seat_name) {
         struct sway_seat *seat = calloc(1, sizeof(struct sway_seat));
         if (!seat) {
                 return NULL;
         }
 
-        seat->seat = wlr_seat_create(display, seat_name);
+        seat->seat = wlr_seat_create(input->server->wl_display, seat_name);
         if (!sway_assert(seat->seat, "could not allocate seat")) {
                 return NULL;
         }
@@ -26,6 +27,8 @@ struct sway_seat *sway_seat_create(struct wl_display *display,
                 return NULL;
         }
 
+        seat->input = input;
+
         wlr_seat_set_capabilities(seat->seat,
                 WL_SEAT_CAPABILITY_KEYBOARD |
                 WL_SEAT_CAPABILITY_POINTER |
@@ -110,3 +113,40 @@ void sway_seat_configure_xcursor(struct sway_seat *seat) {
         wlr_cursor_warp(seat->cursor->cursor, NULL, seat->cursor->cursor->x,
                 seat->cursor->cursor->y);
 }
+
+static void handle_focus_destroy(struct wl_listener *listener, void *data) {
+        struct sway_seat *seat = wl_container_of(listener, seat, focus_destroy);
+        //swayc_t *container = data;
+
+        // TODO set new focus based on the state of the tree
+        sway_seat_set_focus(seat, NULL);
+}
+
+void sway_seat_set_focus(struct sway_seat *seat, swayc_t *container) {
+        swayc_t *last_focus = seat->focus;
+
+        if (last_focus == container) {
+                return;
+        }
+
+        if (last_focus) {
+                wl_list_remove(&seat->focus_destroy.link);
+        }
+
+        if (container) {
+                struct sway_view *view = container->sway_view;
+                view->iface.set_activated(view, true);
+                wl_signal_add(&container->events.destroy, &seat->focus_destroy);
+                seat->focus_destroy.notify = handle_focus_destroy;
+                // TODO give keyboard focus
+        }
+
+        seat->focus = container;
+
+        if (last_focus &&
+                        !sway_input_manager_swayc_has_focus(seat->input, last_focus)) {
+                struct sway_view *view = last_focus->sway_view;
+                view->iface.set_activated(view, false);
+
+        }
+}
diff --git a/sway/tree/container.c b/sway/tree/container.c
index 321ef8b1..78c8625f 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -40,6 +40,9 @@ static swayc_t *new_swayc(enum swayc_types type) {
         if (type != C_VIEW) {
                 c->children = create_list();
         }
+
+        wl_signal_init(&c->events.destroy);
+
         return c;
 }
 
@@ -119,6 +122,9 @@ static void free_swayc(swayc_t *cont) {
         if (!sway_assert(cont, "free_swayc passed NULL")) {
                 return;
         }
+
+        wl_signal_emit(&cont->events.destroy, cont);
+
         if (cont->children) {
                 // remove children until there are no more, free_swayc calls
                 // remove_child, which removes child from this container