UnityEditor.AnimationMode.InAnimationMode C# (CSharp) Method

        public static extern bool InAnimationMode();
        internal static bool InAnimationPlaybackMode()

        private void DoPlayButtons(bool isOrWillEnterPlaymode)
        {
            bool isPlaying = EditorApplication.isPlaying;

            GUI.changed = false;
            int num = (!isPlaying) ? 0 : 4;

            if (AnimationMode.InAnimationMode())
            {
                num = 8;
            }
            Color color = GUI.color + new Color(0.01f, 0.01f, 0.01f, 0.01f);

            GUI.contentColor = new Color(1f / color.r, 1f / color.g, 1f / color.g, 1f / color.a);
            GUILayout.Toggle(isOrWillEnterPlaymode, Toolbar.s_PlayIcons[num], "CommandLeft", new GUILayoutOption[0]);
            GUI.backgroundColor = Color.white;
            if (GUI.changed)
            {
                Toolbar.TogglePlaying();
                GUIUtility.ExitGUI();
            }
            GUI.changed = false;
            bool isPaused = GUILayout.Toggle(EditorApplication.isPaused, Toolbar.s_PlayIcons[num + 1], "CommandMid", new GUILayoutOption[0]);

            if (GUI.changed)
            {
                EditorApplication.isPaused = isPaused;
                GUIUtility.ExitGUI();
            }
            if (GUILayout.Button(Toolbar.s_PlayIcons[num + 2], "CommandRight", new GUILayoutOption[0]))
            {
                EditorApplication.Step();
                GUIUtility.ExitGUI();
            }
        }