Quick and dirty Spine.AnimationState SceneView debug. This logs the current state of the AnimationState tracks.

DEBUG_AnimationStateSceneView.cs

using UnityEngine;
using System.Text;

public class DEBUG_AnimationStateSceneView : MonoBehaviour {
	public bool follow = true;
}

#if UNITY_EDITOR
namespace Spine.Unity.Debugger {
	[UnityEditor.CustomEditor(typeof(DEBUG_AnimationStateSceneView))]
	public class DEBUG_AnimationStateSceneViewEditor : UnityEditor.Editor {

		IAnimationStateComponent skeletonAnimation;
		ISkeletonComponent skeletonComponent;
		DEBUG_AnimationStateSceneView component;
		Transform transform;
		Spine.AnimationState state;

		void OnEnable () {
			if (component == null) component = target as DEBUG_AnimationStateSceneView;
			if (transform == null) transform = component.transform;

			if (skeletonAnimation == null) skeletonAnimation = component.GetComponent<IAnimationStateComponent>();
			if (skeletonAnimation != null) state = skeletonAnimation.AnimationState;

			if (skeletonComponent == null) skeletonComponent = component.GetComponent<ISkeletonComponent>();
		}

		void OnSceneGUI () {
			if (state == null) OnEnable();
			if (state == null) return;

			Vector3 labelPos = component.follow ? skeletonComponent.Skeleton.RootBone.GetWorldPosition(transform) : Vector3.zero;
			GUIStyle labelStyle = UnityEditor.EditorStyles.whiteMiniLabel;

			if (!Application.isPlaying) {
				UnityEditor.Handles.Label(labelPos, "Switch to PLAY MODE to debug Spine.AnimationState.", labelStyle);
				return;
			}

			var sb = new StringBuilder();

			const string format = "##.00";
			const string looping = "(\u21bb)";
			bool mixing = false;

			var stateTracks = state.Tracks;
			var stateTracksItems = stateTracks.Items;
			for (int i = 0, n = state.Tracks.Count; i < n; i++) {
				var trackEntry = stateTracksItems[i];
				if (trackEntry == null) continue;

				sb.AppendFormat("Track {0}:\n-------------------------\n", i);
				TrackEntry previous = trackEntry.MixingFrom;
				while (previous != null) {
					sb.Append(previous.Animation.Name);
					if (previous.Loop) sb.Append(looping);
					sb.Append("->");
					previous = previous.MixingFrom;
					mixing = true;
				}
				sb.Append(trackEntry.Animation.Name);
				if (trackEntry.Loop) sb.Append(looping);

				TrackEntry next = trackEntry.Next;
				while (next != null) {
					sb.Append("->");
					sb.Append(next.Animation.Name);
					if (next.Loop) sb.Append(looping);
					next = next.Next;
				}

				sb.AppendFormat(
					"\ntrack:{0} animation:{1}",
					trackEntry.TrackTime.ToString(format),
					trackEntry.AnimationTime.ToString(format)
				);
				if (mixing) {
					sb.AppendFormat("\nmix:{0} mixduration:{1} mixPercent:{2}",
						trackEntry.MixTime.ToString(format),
						trackEntry.MixDuration.ToString(format),
						(trackEntry.MixTime/trackEntry.MixDuration).ToString(format)
					);
				}
				sb.Append("\n");
			}

			UnityEditor.Handles.Label(labelPos, sb.ToString(), labelStyle);
		}
	}

}
#endif