[libhandy] swipe-tracker: Stop using hdy_swipeable_get_range()

[Adrien Plazas <aplazas src gnome org>]

commit c8e62d06ce307be6c49158fe4625683a0509dfa9
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Jun 28 20:00:37 2020 +0500

    swipe-tracker: Stop using hdy_swipeable_get_range()
    
    Now that get_snap_points() is implemented everywhere, we can easily
    reimplement get_range() using it.
    
    Signed-off-by: Alexander Mikhaylenko <alexm gnome org>

 src/hdy-swipe-tracker.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)
---
diff --git a/src/hdy-swipe-tracker.c b/src/hdy-swipe-tracker.c
index f78951d6..57a74d14 100644
--- a/src/hdy-swipe-tracker.c
+++ b/src/hdy-swipe-tracker.c
@@ -125,6 +125,20 @@ reset (HdySwipeTracker *self)
     gtk_grab_remove (GTK_WIDGET (self->swipeable));
 }
 
+static void
+get_range (HdySwipeTracker *self,
+           gdouble         *first,
+           gdouble         *last)
+{
+  g_autofree gdouble *points = NULL;
+  gint n;
+
+  points = hdy_swipeable_get_snap_points (self->swipeable, &n);
+
+  *first = points[0];
+  *last = points[n - 1];
+}
+
 static void
 gesture_prepare (HdySwipeTracker        *self,
                  HdyNavigationDirection  direction)
@@ -185,7 +199,7 @@ gesture_update (HdySwipeTracker *self,
   if (time != self->prev_time)
     self->velocity = delta / (time - self->prev_time);
 
-  hdy_swipeable_get_range (self->swipeable, &first_point, &last_point);
+  get_range (self, &first_point, &last_point);
 
   progress = self->progress + delta;
   progress = CLAMP (progress, first_point, last_point);
@@ -343,7 +357,7 @@ drag_update_cb (HdySwipeTracker *self,
     gdouble first_point, last_point;
     gboolean is_overshooting;
 
-    hdy_swipeable_get_range (self->swipeable, &first_point, &last_point);
+    get_range (self, &first_point, &last_point);
 
     drag_distance = sqrt (offset_x * offset_x + offset_y * offset_y);
     is_overshooting = (offset < 0 && self->progress <= first_point) ||
@@ -475,7 +489,7 @@ handle_scroll_event (HdySwipeTracker *self,
     gboolean is_overshooting;
     gdouble first_point, last_point;
 
-    hdy_swipeable_get_range (self->swipeable, &first_point, &last_point);
+    get_range (self, &first_point, &last_point);
 
     is_overshooting = (delta < 0 && self->progress <= first_point) ||
                       (delta > 0 && self->progress >= last_point);