[libadwaita/wip/exalm/animation-cleanups: 2/8] easing: Add adw_easing_ease()

[Alexander Mikhaylenko <alexm src gnome org>]

commit b899029e55cf25e3a460f5acc112dfa692cd8974
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Nov 22 18:49:09 2021 +0500

    easing: Add adw_easing_ease()
    
    Have a public function for actually using easings outside timed animations
    as well.

 src/adw-easing.c          | 31 +++++++++++++++++++++++++++++++
 src/adw-easing.h          |  4 ++++
 src/adw-timed-animation.c | 14 +-------------
 3 files changed, 36 insertions(+), 13 deletions(-)
---
diff --git a/src/adw-easing.c b/src/adw-easing.c
index 94be65e6..702774c2 100644
--- a/src/adw-easing.c
+++ b/src/adw-easing.c
@@ -8,6 +8,8 @@
 
 #include "adw-easing.h"
 
+#include "adw-animation-util-private.h"
+
 /**
  * AdwEasing:
  * @ADW_EASING_EASE_IN_CUBIC: Starts slowly and accelerates, cubic curve.
@@ -24,3 +26,32 @@
  *
  * Since: 1.0
  */
+
+/**
+ * adw_easing_ease:
+ * @self: a `AdwEasing`
+ * @value: a value to ease
+ *
+ * Computes easing with @easing for @value.
+ *
+ * @value should generally be in the [0, 1] range.
+ *
+ * Returns: the easing for @value
+ *
+ * Since: 1.0
+ */
+double
+adw_easing_ease (AdwEasing self,
+                 double    value)
+{
+  switch (self) {
+    case ADW_EASING_EASE_IN_CUBIC:
+      return adw_ease_in_cubic (value);
+    case ADW_EASING_EASE_OUT_CUBIC:
+      return adw_ease_out_cubic (value);
+    case ADW_EASING_EASE_IN_OUT_CUBIC:
+      return adw_ease_in_out_cubic (value);
+    default:
+      g_assert_not_reached ();
+  }
+}
diff --git a/src/adw-easing.h b/src/adw-easing.h
index 5dc640b5..39155eb0 100644
--- a/src/adw-easing.h
+++ b/src/adw-easing.h
@@ -24,4 +24,8 @@ typedef enum {
   ADW_EASING_EASE_IN_OUT_CUBIC,
 } AdwEasing;
 
+ADW_AVAILABLE_IN_ALL
+double adw_easing_ease (AdwEasing self,
+                        double    value);
+
 G_END_DECLS
diff --git a/src/adw-timed-animation.c b/src/adw-timed-animation.c
index b40fc6f7..d4382bbb 100644
--- a/src/adw-timed-animation.c
+++ b/src/adw-timed-animation.c
@@ -110,19 +110,7 @@ adw_timed_animation_calculate_value (AdwAnimation *animation,
 
   progress = reverse ? (1 - progress) : progress;
 
-  switch (self->easing) {
-    case ADW_EASING_EASE_IN_CUBIC:
-      value = adw_ease_in_cubic (progress);
-      break;
-    case ADW_EASING_EASE_OUT_CUBIC:
-      value = adw_ease_out_cubic (progress);
-      break;
-    case ADW_EASING_EASE_IN_OUT_CUBIC:
-      value = adw_ease_in_out_cubic (progress);
-      break;
-    default:
-      g_assert_not_reached ();
-  }
+  value = adw_easing_ease (self->easing, progress);
 
   return adw_lerp (self->value_from, self->value_to, value);
 }