Add support for touch cancel events

5 files changed, 53 insertions, 0 deletions

diff --git a/include/sway/input/cursor.h b/include/sway/input/cursor.h
index 4a3774d9..c7da8829 100644
--- a/include/sway/input/cursor.h
+++ b/include/sway/input/cursor.h
@@ -53,6 +53,7 @@ struct sway_cursor {
 
         struct wl_listener touch_down;
         struct wl_listener touch_up;
+        struct wl_listener touch_cancel;
         struct wl_listener touch_motion;
         struct wl_listener touch_frame;
         bool simulating_pointer_from_touch;
diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index 6d29cf3b..5ef8e2f3 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -44,6 +44,8 @@ struct sway_seatop_impl {
                         struct wlr_touch_up_event *event);
         void (*touch_down)(struct sway_seat *seat,
                         struct wlr_touch_down_event *event, double lx, double ly);
+        void (*touch_cancel)(struct sway_seat *seat,
+                        struct wlr_touch_cancel_event *event);
         void (*tablet_tool_motion)(struct sway_seat *seat,
                         struct sway_tablet_tool *tool, uint32_t time_msec);
         void (*tablet_tool_tip)(struct sway_seat *seat, struct sway_tablet_tool *tool,
@@ -338,6 +340,9 @@ void seatop_touch_up(struct sway_seat *seat,
 void seatop_touch_down(struct sway_seat *seat,
                 struct wlr_touch_down_event *event, double lx, double ly);
 
+void seatop_touch_cancel(struct sway_seat *seat,
+                struct wlr_touch_cancel_event *event);
+
 void seatop_rebase(struct sway_seat *seat, uint32_t time_msec);
 
 /**
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 75d055cd..d8ec11ac 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -509,6 +509,24 @@ static void handle_touch_up(struct wl_listener *listener, void *data) {
         }
 }
 
+static void handle_touch_cancel(struct wl_listener *listener, void *data) {
+        struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_cancel);
+        struct wlr_touch_cancel_event *event = data;
+        cursor_handle_activity_from_device(cursor, &event->touch->base);
+
+        struct sway_seat *seat = cursor->seat;
+
+        if (cursor->simulating_pointer_from_touch) {
+                if (cursor->pointer_touch_id == cursor->seat->touch_id) {
+                        cursor->pointer_touch_up = true;
+                        dispatch_cursor_button(cursor, &event->touch->base,
+                                event->time_msec, BTN_LEFT, WLR_BUTTON_RELEASED);
+                }
+        } else {
+                seatop_touch_cancel(seat, event);
+        }
+}
+
 static void handle_touch_motion(struct wl_listener *listener, void *data) {
         struct sway_cursor *cursor =
                 wl_container_of(listener, cursor, touch_motion);
@@ -1100,6 +1118,7 @@ void sway_cursor_destroy(struct sway_cursor *cursor) {
         wl_list_remove(&cursor->frame.link);
         wl_list_remove(&cursor->touch_down.link);
         wl_list_remove(&cursor->touch_up.link);
+        wl_list_remove(&cursor->touch_cancel.link);
         wl_list_remove(&cursor->touch_motion.link);
         wl_list_remove(&cursor->touch_frame.link);
         wl_list_remove(&cursor->tool_axis.link);
@@ -1181,6 +1200,9 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
         wl_signal_add(&wlr_cursor->events.touch_up, &cursor->touch_up);
         cursor->touch_up.notify = handle_touch_up;
 
+        wl_signal_add(&wlr_cursor->events.touch_cancel, &cursor->touch_cancel);
+        cursor->touch_cancel.notify = handle_touch_cancel;
+
         wl_signal_add(&wlr_cursor->events.touch_motion,
                 &cursor->touch_motion);
         cursor->touch_motion.notify = handle_touch_motion;
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 6b95e46a..bcb89b48 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -1638,6 +1638,12 @@ void seatop_touch_down(struct sway_seat *seat, struct wlr_touch_down_event *even
         }
 }
 
+void seatop_touch_cancel(struct sway_seat *seat, struct wlr_touch_cancel_event *event) {
+        if (seat->seatop_impl->touch_cancel) {
+                seat->seatop_impl->touch_cancel(seat, event);
+        }
+}
+
 void seatop_tablet_tool_tip(struct sway_seat *seat,
                 struct sway_tablet_tool *tool, uint32_t time_msec,
                 enum wlr_tablet_tool_tip_state state) {
diff --git a/sway/input/seatop_down.c b/sway/input/seatop_down.c
index 6447134e..c5901f6a 100644
--- a/sway/input/seatop_down.c
+++ b/sway/input/seatop_down.c
@@ -104,6 +104,24 @@ static void handle_touch_down(struct sway_seat *seat,
         }
 }
 
+static void handle_touch_cancel(struct sway_seat *seat,
+                struct wlr_touch_cancel_event *event) {
+        struct seatop_down_event *e = seat->seatop_data;
+        struct seatop_touch_point_event *point_event, *tmp;
+
+        wl_list_for_each_safe(point_event, tmp, &e->point_events, link) {
+                if (point_event->touch_id == event->touch_id) {
+                        wl_list_remove(&point_event->link);
+                        free(point_event);
+                        break;
+                }
+        }
+
+        if (e->surface) {
+                wlr_seat_touch_notify_cancel(seat->wlr_seat, e->surface);
+        }
+}
+
 static void handle_pointer_axis(struct sway_seat *seat,
                 struct wlr_pointer_axis_event *event) {
         struct sway_input_device *input_device =
@@ -189,6 +207,7 @@ static const struct sway_seatop_impl seatop_impl = {
         .touch_motion = handle_touch_motion,
         .touch_up = handle_touch_up,
         .touch_down = handle_touch_down,
+        .touch_cancel = handle_touch_cancel,
         .unref = handle_unref,
         .end = handle_end,
         .allow_set_cursor = true,