input: pass the global touch coordinates to the touch grab

This makes it consistent with the pointer grab, which also gets
global coordinates and not surface relative ones, and allows to
easily filter out gestures based on compositor global hotspots.

Reviewed-by: Daniel Stone <daniels@collabora.com>

desktop-shell/shell.c

@@ -1580,7 +1580,7 @@ bind_workspace_manager(struct wl_client *client,
 
 static void
 touch_move_grab_down(struct weston_touch_grab *grab, uint32_t time,
-		     int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+		     int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 }
 
@@ -1602,7 +1602,7 @@ touch_move_grab_up(struct weston_touch_grab *grab, uint32_t time, int touch_id)
 
 static void
 touch_move_grab_motion(struct weston_touch_grab *grab, uint32_t time,
-		       int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+		       int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct weston_touch_move_grab *move = (struct weston_touch_move_grab *) grab;
 	struct shell_surface *shsurf = move->base.shsurf;
@@ -3291,7 +3291,7 @@ static const struct weston_pointer_grab_interface popup_grab_interface = {
 
 static void
 touch_popup_grab_down(struct weston_touch_grab *grab, uint32_t time,
-		      int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+		      int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct wl_resource *resource;
 	struct shell_seat *shseat =
@@ -3299,6 +3299,9 @@ touch_popup_grab_down(struct weston_touch_grab *grab, uint32_t time,
 	struct wl_display *display = shseat->seat->compositor->wl_display;
 	uint32_t serial;
 	struct wl_list *resource_list;
+	wl_fixed_t sx, sy;
+
+	weston_view_from_global_fixed(grab->touch->focus, x, y, &sx, &sy);
 
 	resource_list = &grab->touch->focus_resource_list;
 	if (!wl_list_empty(resource_list)) {
@@ -3332,10 +3335,13 @@ touch_popup_grab_up(struct weston_touch_grab *grab, uint32_t time, int touch_id)
 
 static void
 touch_popup_grab_motion(struct weston_touch_grab *grab, uint32_t time,
-			int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+			int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct wl_resource *resource;
 	struct wl_list *resource_list;
+	wl_fixed_t sx, sy;
+
+	weston_view_from_global_fixed(grab->touch->focus, x, y, &sx, &sy);
 
 	resource_list = &grab->touch->focus_resource_list;
 	if (!wl_list_empty(resource_list)) {

src/data-device.c

@@ -480,7 +480,7 @@ drag_grab_touch_focus(struct weston_touch_drag *drag)
 
 static void
 drag_grab_touch_motion(struct weston_touch_grab *grab, uint32_t time,
-		int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+		int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct weston_touch_drag *touch_drag =
 		container_of(grab, struct weston_touch_drag, grab);

src/input.c

@@ -236,13 +236,16 @@ static const struct weston_pointer_grab_interface
 
 static void
 default_grab_touch_down(struct weston_touch_grab *grab, uint32_t time,
-			int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+			int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct weston_touch *touch = grab->touch;
 	struct wl_display *display = touch->seat->compositor->wl_display;
 	uint32_t serial;
 	struct wl_resource *resource;
 	struct wl_list *resource_list;
+	wl_fixed_t sx, sy;
+
+	weston_view_from_global_fixed(touch->focus, x, y, &sx, &sy);
 
 	resource_list = &touch->focus_resource_list;
 
@@ -276,11 +279,14 @@ default_grab_touch_up(struct weston_touch_grab *grab,
 
 static void
 default_grab_touch_motion(struct weston_touch_grab *grab, uint32_t time,
-			  int touch_id, wl_fixed_t sx, wl_fixed_t sy)
+			  int touch_id, wl_fixed_t x, wl_fixed_t y)
 {
 	struct weston_touch *touch = grab->touch;
 	struct wl_resource *resource;
 	struct wl_list *resource_list;
+	wl_fixed_t sx, sy;
+
+	weston_view_from_global_fixed(touch->focus, x, y, &sx, &sy);
 
 	resource_list = &touch->focus_resource_list;
 
@@ -1535,10 +1541,7 @@ notify_touch(struct weston_seat *seat, uint32_t time, int touch_id,
 		if (touch->num_tp == 1) {
 			ev = weston_compositor_pick_view(ec, x, y, &sx, &sy);
 			weston_touch_set_focus(touch, ev);
-		} else if (touch->focus) {
+		} else if (!touch->focus) {
-			ev = touch->focus;
-			weston_view_from_global_fixed(ev, x, y, &sx, &sy);
-		} else {
 			/* Unexpected condition: We have non-initial touch but
 			 * there is no focused surface.
 			 */
@@ -1550,7 +1553,7 @@ notify_touch(struct weston_seat *seat, uint32_t time, int touch_id,
 		weston_compositor_run_touch_binding(ec, touch,
 						    time, touch_type);
 
-		grab->interface->down(grab, time, touch_id, sx, sy);
+		grab->interface->down(grab, time, touch_id, x, y);
 		if (touch->num_tp == 1) {
 			touch->grab_serial =
 				wl_display_get_serial(ec->wl_display);
@@ -1566,8 +1569,7 @@ notify_touch(struct weston_seat *seat, uint32_t time, int touch_id,
 		if (!ev)
 			break;
 
-		weston_view_from_global_fixed(ev, x, y, &sx, &sy);
+		grab->interface->motion(grab, time, touch_id, x, y);
-		grab->interface->motion(grab, time, touch_id, sx, sy);
 		break;
 	case WL_TOUCH_UP:
 		if (touch->num_tp == 0) {