From 68b9ade03e574a27a240aec0b24519bab6fa7993 Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Sun, 21 Jan 2024 21:18:09 -0500
Subject: [PATCH] Keep track of animation state

---
 include/hexagram/anim.h | 6 ++++++
 src/anim.c              | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/include/hexagram/anim.h b/include/hexagram/anim.h
index 910b010..e5c735c 100644
--- a/include/hexagram/anim.h
+++ b/include/hexagram/anim.h
@@ -13,6 +13,11 @@ typedef enum {
     HEXAGRAM_ANIM_RADIUS = 1 << 2
 } hexagram_anim_flags;
 
+typedef enum {
+    HEXAGRAM_ANIM_STOPPED,
+    HEXAGRAM_ANIM_PLAYING
+} hexagram_anim_state;
+
 typedef struct _hexagram_anim_stop hexagram_anim_stop;
 
 typedef double (hexagram_anim_progress_fn)(hexagram_anim_stop *, double);
@@ -45,6 +50,7 @@ struct _hexagram_anim_stop {
 typedef struct _hexagram_anim {
     hexagram_anim_stop *stops;
     size_t count;
+    hexagram_anim_state state;
     struct timeval start, now;
 } hexagram_anim;
 
diff --git a/src/anim.c b/src/anim.c
index 978cbb7..9250b8a 100644
--- a/src/anim.c
+++ b/src/anim.c
@@ -4,6 +4,7 @@
 #include <hexagram/anim.h>
 
 void hexagram_anim_init(hexagram_anim *anim) {
+    anim->state = HEXAGRAM_ANIM_PLAYING;
     gettimeofday(&anim->start, NULL);
 }
 
@@ -27,6 +28,10 @@ int hexagram_anim_step(hexagram_anim *anim) {
     double offset = 0.0, interval, progress;
     size_t i, a;
 
+    if (anim->state == HEXAGRAM_ANIM_STOPPED) {
+        return 0;
+    }
+
     gettimeofday(&anim->now, NULL);
 
     timersub(&anim->now, &anim->start, &tv);
@@ -53,6 +58,7 @@ int hexagram_anim_step(hexagram_anim *anim) {
     if (i == anim->count) {
         i--;
         progress = 1.0;
+        anim->state = HEXAGRAM_ANIM_STOPPED;
     } else if (anim->stops[i].fn) {
         progress = anim->stops[i].fn(&anim->stops[i],
                       (interval - offset) / anim->stops[i].duration);