wth-receiver-seat: Display a message when we don't have a valid seat

This way we inform the users that the receiver won't relaying back
events. This could happen if the user starts the transmitter side after
starts the receiver.

For now this just informs the users, requiring a follow-up fix, as to
determine why we do not have a valid seat and input devices, if the order
in which the transmitter and receiver is started is changed.

Bug-AGL: SPEC-3601, SPEC-3605

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I0c398358f22697323bd90cdaedcbfac03ca5c8dc

1 files changed, 55 insertions, 5 deletions

diff --git a/src/wth-receiver-seat.c b/src/wth-receiver-seat.c
index 3457748..f4b4886 100644
--- a/src/wth-receiver-seat.c
+++ b/src/wth-receiver-seat.c
@@ -39,6 +39,11 @@ waltham_touch_down(struct window *window, uint32_t serial,
 	struct seat *seat = window->receiver_seat;
 	struct touch *touch = seat->touch;
 
+	if (!touch) {
+		fprintf(stderr, "We do not have touch device!\n");
+		return;
+	}
+
 	if (touch->obj) {
 		fprintf(stdout, "waltham_touch_down() sending touch_down\n");
 		wthp_touch_send_down(touch->obj, serial, time, surface->obj, id, x_w, y_w);
@@ -53,6 +58,11 @@ waltham_touch_up(struct window *window, uint32_t serial,
 	struct seat *seat = window->receiver_seat;
 	struct touch *touch = seat->touch;
 
+	if (!touch) {
+		fprintf(stderr, "We do not have touch device!\n");
+		return;
+	}
+
 	if (touch->obj) {
 		fprintf(stdout, "waltham_touch_motion() sending touch_up\n");
 		wthp_touch_send_up(touch->obj, serial, time, id);
@@ -67,6 +77,11 @@ waltham_touch_motion(struct window *window, uint32_t time,
 	struct seat *seat = window->receiver_seat;
 	struct touch *touch = seat->touch;
 
+	if (!touch) {
+		fprintf(stderr, "We do not have touch device!\n");
+		return;
+	}
+
 	if (touch->obj) {
 		fprintf(stdout, "waltham_touch_motion() sending touch_motion\n");
 		wthp_touch_send_motion(touch->obj, time, id, x_w, y_w);
@@ -79,6 +94,11 @@ waltham_touch_frame(struct window *window)
 	struct seat *seat = window->receiver_seat;
 	struct touch *touch = seat->touch;
 
+	if (!touch) {
+		fprintf(stderr, "We do not have touch device!\n");
+		return;
+	}
+
 	if (touch->obj) {
 		fprintf(stdout, "waltham_touch_frame() sending frame\n");
 		wthp_touch_send_frame(touch->obj);
@@ -91,6 +111,11 @@ waltham_touch_cancel(struct window *window)
 	struct seat *seat = window->receiver_seat;
 	struct touch *touch = seat->touch;
 
+	if (!touch) {
+		fprintf(stderr, "We do not have touch device!\n");
+		return;
+	}
+
 	if (touch->obj) {
 		fprintf(stdout, "waltham_touch_cancel() sending cancel\n");
 		wthp_touch_send_cancel(touch->obj);
@@ -109,7 +134,12 @@ waltham_pointer_enter(struct window *window, uint32_t serial,
 	struct seat *seat = window->receiver_seat;
 	struct pointer *pointer = seat->pointer;
 
-	if (pointer->obj) {
+	if (!pointer) {
+		fprintf(stderr, "We do not have pointer device!\n");
+		return;
+	}
+
+	if (pointer && pointer->obj) {
 		fprintf(stdout, "waltham_pointer_enter() sending enter\n");
 		wthp_pointer_send_enter(pointer->obj, serial, surface->obj, sx, sy);
 	}
@@ -122,7 +152,12 @@ waltham_pointer_leave(struct window *window, uint32_t serial)
 	struct seat *seat = window->receiver_seat;
 	struct pointer *pointer = seat->pointer;
 
-	if (pointer->obj) {
+	if (!pointer) {
+		fprintf(stderr, "We do not have pointer device!\n");
+		return;
+	}
+
+	if (pointer && pointer->obj) {
 		fprintf(stdout, "waltham_pointer_leave() sending leave\n");
 		wthp_pointer_send_leave(pointer->obj, serial, surface->obj);
 	}
@@ -135,7 +170,12 @@ waltham_pointer_motion(struct window *window, uint32_t time,
 	struct seat *seat = window->receiver_seat;
 	struct pointer *pointer = seat->pointer;
 
-	if (pointer->obj) {
+	if (!pointer) {
+		fprintf(stderr, "We do not have pointer device!\n");
+		return;
+	}
+
+	if (pointer && pointer->obj) {
 		fprintf(stdout, "waltham_pointer_motion() sending motion\n");
 		wthp_pointer_send_motion(pointer->obj, time, sx, sy);
 	}
@@ -149,7 +189,12 @@ waltham_pointer_button(struct window *window, uint32_t serial,
 	struct seat *seat = window->receiver_seat;
 	struct pointer *pointer = seat->pointer;
 
-	if (pointer->obj) {
+	if (!pointer) {
+		fprintf(stderr, "We do not have pointer device!\n");
+		return;
+	}
+
+	if (pointer && pointer->obj) {
 		fprintf(stdout, "waltham_pointer_button() sending button\n");
 		wthp_pointer_send_button(pointer->obj, serial, time, button, state);
 	}
@@ -162,7 +207,12 @@ waltham_pointer_axis(struct window *window, uint32_t time,
 	struct seat *seat = window->receiver_seat;
 	struct pointer *pointer = seat->pointer;
 
-	if (pointer->obj) {
+	if (!pointer) {
+		fprintf(stderr, "We do not have pointer device!\n");
+		return;
+	}
+
+	if (pointer && pointer->obj) {
 		fprintf(stdout, "waltham_pointer_axis() sending pointer_axis\n");
 		wthp_pointer_send_axis(pointer->obj, time, axis, value);
 	}