[libadwaita/wip/exalm/animation-cleanups: 4/8] easing: Move the easing functions from animation utils

[Alexander Mikhaylenko <alexm src gnome org>]

commit d95918c3625c19dd9628fccf1a1ac6b97187116e
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Nov 22 19:07:49 2021 +0500

    easing: Move the easing functions from animation utils
    
    Make them static, recommend using adw_easing_ease().

 doc/migrating-between-development-versions.md |  6 ++++
 doc/migrating-libhandy-1-4-to-libadwaita.md   |  6 ++++
 src/adw-animation-util-private.h              |  3 --
 src/adw-animation-util.c                      | 41 ---------------------------
 src/adw-animation-util.h                      |  3 --
 src/adw-clamp-layout.c                        |  5 ++--
 src/adw-easing.c                              | 38 +++++++++++++++++++++----
 src/adw-tab-box.c                             |  5 +++-
 src/adw-toast-overlay.c                       |  4 ++-
 src/gtkprogresstracker.c                      |  4 +--
 10 files changed, 56 insertions(+), 59 deletions(-)
---
diff --git a/doc/migrating-between-development-versions.md b/doc/migrating-between-development-versions.md
index faee4532..898645f8 100644
--- a/doc/migrating-between-development-versions.md
+++ b/doc/migrating-between-development-versions.md
@@ -304,6 +304,12 @@ swipes.
 The type of the `duration` parameter in [method@Adw.Carousel.scroll_to_full] has
 changed from `gint64` to `guint`.
 
+### Adapt to Miscellaneous Changes
+
+The `adw_ease_out_cubic()` function has been removed. Instead,
+[func Adw Easing ease] can be used with the `ADW_EASING_EASE_OUT_CUBIC`
+parameter.
+
 ### Adapt to Stylesheet Changes
 
 ### Adapt to the `button.outline` style removal
diff --git a/doc/migrating-libhandy-1-4-to-libadwaita.md b/doc/migrating-libhandy-1-4-to-libadwaita.md
index 6d4fb98a..899df7d9 100644
--- a/doc/migrating-libhandy-1-4-to-libadwaita.md
+++ b/doc/migrating-libhandy-1-4-to-libadwaita.md
@@ -360,6 +360,12 @@ swipes.
 The type of the `duration` parameter in [method@Adw.Carousel.scroll_to_full] has
 changed from `gint64` to `guint`.
 
+### Adapt to Miscellaneous Changes
+
+The `hdy_ease_out_cubic()` function has been removed. Instead,
+[func Adw Easing ease] can be used with the `ADW_EASING_EASE_OUT_CUBIC`
+parameter.
+
 ### Adapt to Stylesheet Changes
 
 Most widgets don't have a backdrop state anymore, and the following public
diff --git a/src/adw-animation-util-private.h b/src/adw-animation-util-private.h
index 5ebf2a7a..e4eeb428 100644
--- a/src/adw-animation-util-private.h
+++ b/src/adw-animation-util-private.h
@@ -16,9 +16,6 @@
 
 G_BEGIN_DECLS
 
-double adw_ease_in_cubic     (double t);
-double adw_ease_in_out_cubic (double t);
-
 double adw_lerp (double a,
                  double b,
                  double t);
diff --git a/src/adw-animation-util.c b/src/adw-animation-util.c
index 8228249a..65bb1097 100644
--- a/src/adw-animation-util.c
+++ b/src/adw-animation-util.c
@@ -27,47 +27,6 @@ adw_lerp (double a, double b, double t)
   return a * (1.0 - t) + b * t;
 }
 
-/* From clutter-easing.c, based on Robert Penner's
- * infamous easing equations, MIT license.
- */
-
-/**
- * adw_ease_out_cubic:
- * @t: the term
- *
- * Computes the ease out for @t.
- *
- * Returns: the ease out for @t
- *
- * Since: 1.0
- */
-
-double
-adw_ease_out_cubic (double t)
-{
-  double p = t - 1;
-  return p * p * p + 1;
-}
-
-double
-adw_ease_in_cubic (gdouble t)
-{
-  return t * t * t;
-}
-
-double
-adw_ease_in_out_cubic (double t)
-{
-  double p = t * 2;
-
-  if (p < 1)
-    return 0.5 * p * p * p;
-
-  p -= 2;
-
-  return 0.5 * (p * p * p + 2);
-}
-
 /**
  * adw_get_enable_animations:
  * @widget: a `GtkWidget`
diff --git a/src/adw-animation-util.h b/src/adw-animation-util.h
index e97a2e88..02f5cf91 100644
--- a/src/adw-animation-util.h
+++ b/src/adw-animation-util.h
@@ -17,9 +17,6 @@
 
 G_BEGIN_DECLS
 
-ADW_AVAILABLE_IN_ALL
-double adw_ease_out_cubic (double t);
-
 ADW_AVAILABLE_IN_ALL
 gboolean adw_get_enable_animations (GtkWidget *widget);
 
diff --git a/src/adw-clamp-layout.c b/src/adw-clamp-layout.c
index 0a1833de..3d5431d8 100644
--- a/src/adw-clamp-layout.c
+++ b/src/adw-clamp-layout.c
@@ -9,8 +9,7 @@
 
 #include <math.h>
 
-#include "adw-animation-util.h"
-#include "adw-animation-private.h"
+#include "adw-easing.h"
 #include "adw-macros-private.h"
 
 /**
@@ -161,7 +160,7 @@ get_child_size (AdwClampLayout *self,
 
   progress = (double) (for_size - lower) / (double) (upper - lower);
 
-  return adw_ease_out_cubic (progress) * amplitude + lower;
+  return adw_easing_ease (ADW_EASING_EASE_OUT_CUBIC, progress) * amplitude + lower;
 }
 
 static GtkSizeRequestMode
diff --git a/src/adw-easing.c b/src/adw-easing.c
index 702774c2..b62db4d6 100644
--- a/src/adw-easing.c
+++ b/src/adw-easing.c
@@ -8,8 +8,6 @@
 
 #include "adw-easing.h"
 
-#include "adw-animation-util-private.h"
-
 /**
  * AdwEasing:
  * @ADW_EASING_EASE_IN_CUBIC: Starts slowly and accelerates, cubic curve.
@@ -27,6 +25,36 @@
  * Since: 1.0
  */
 
+/* From clutter-easing.c, based on Robert Penner's
+ * infamous easing equations, MIT license.
+ */
+
+static inline double
+ease_out_cubic (double t)
+{
+  double p = t - 1;
+  return p * p * p + 1;
+}
+
+static inline double
+ease_in_cubic (gdouble t)
+{
+  return t * t * t;
+}
+
+static inline double
+ease_in_out_cubic (double t)
+{
+  double p = t * 2;
+
+  if (p < 1)
+    return 0.5 * p * p * p;
+
+  p -= 2;
+
+  return 0.5 * (p * p * p + 2);
+}
+
 /**
  * adw_easing_ease:
  * @self: a `AdwEasing`
@@ -46,11 +74,11 @@ adw_easing_ease (AdwEasing self,
 {
   switch (self) {
     case ADW_EASING_EASE_IN_CUBIC:
-      return adw_ease_in_cubic (value);
+      return ease_in_cubic (value);
     case ADW_EASING_EASE_OUT_CUBIC:
-      return adw_ease_out_cubic (value);
+      return ease_out_cubic (value);
     case ADW_EASING_EASE_IN_OUT_CUBIC:
-      return adw_ease_in_out_cubic (value);
+      return ease_in_out_cubic (value);
     default:
       g_assert_not_reached ();
   }
diff --git a/src/adw-tab-box.c b/src/adw-tab-box.c
index 5383d6aa..73b245c1 100644
--- a/src/adw-tab-box.c
+++ b/src/adw-tab-box.c
@@ -9,7 +9,9 @@
 #include "config.h"
 
 #include "adw-tab-box-private.h"
+
 #include "adw-animation-util-private.h"
+#include "adw-easing.h"
 #include "adw-gizmo-private.h"
 #include "adw-macros-private.h"
 #include "adw-tab-private.h"
@@ -1258,7 +1260,8 @@ drag_autoscroll_cb (GtkWidget     *widget,
     autoscroll_factor = (x - end_threshold) / autoscroll_area;
 
   autoscroll_factor = CLAMP (autoscroll_factor, -1, 1);
-  autoscroll_factor = adw_ease_in_cubic (autoscroll_factor);
+  autoscroll_factor = adw_easing_ease (ADW_EASING_EASE_IN_CUBIC,
+                                       autoscroll_factor);
   self->drag_autoscroll_prev_time = time;
 
   if (autoscroll_factor == 0)
diff --git a/src/adw-toast-overlay.c b/src/adw-toast-overlay.c
index 081c98e2..162717e6 100644
--- a/src/adw-toast-overlay.c
+++ b/src/adw-toast-overlay.c
@@ -9,6 +9,7 @@
 #include "adw-toast-overlay.h"
 
 #include "adw-animation-util-private.h"
+#include "adw-easing.h"
 #include "adw-macros-private.h"
 #include "adw-timed-animation.h"
 #include "adw-toast-private.h"
@@ -123,7 +124,8 @@ static void
 hide_value_cb (ToastInfo *info,
                double     value)
 {
-  gtk_widget_set_opacity (info->widget, adw_ease_out_cubic (value));
+  value = adw_easing_ease (ADW_EASING_EASE_OUT_CUBIC, value);
+  gtk_widget_set_opacity (info->widget, value);
 
   gtk_widget_queue_allocate (GTK_WIDGET (info->overlay));
 }
diff --git a/src/gtkprogresstracker.c b/src/gtkprogresstracker.c
index 1f32edfc..0339cdd2 100644
--- a/src/gtkprogresstracker.c
+++ b/src/gtkprogresstracker.c
@@ -24,7 +24,7 @@
 #include <math.h>
 #include <string.h>
 
-#include "adw-animation-util.h"
+#include "adw-easing.h"
 
 /*
  * Progress tracker is small helper for tracking progress through gtk
@@ -244,5 +244,5 @@ gtk_progress_tracker_get_ease_out_cubic (GtkProgressTracker *tracker,
                                          gboolean reversed)
 {
   double progress = gtk_progress_tracker_get_progress (tracker, reversed);
-  return adw_ease_out_cubic (progress);
+  return adw_easing_ease (ADW_EASING_EASE_OUT_CUBIC, progress);
 }