[unity] Add option to not pause spine with timeline

There is already an option with hold the animation, but there is no
option to not pause the animation while the Timeline director is paused.

An example use-case where this option is important is when the timeline
is paused while waiting for an user input, but there is still a need to
play an idle loop animation on a spine skeleton.

spine-unity/Modules/com.esotericsoftware.spine.timeline/Editor/SpineAnimationStateDrawer.cs

@@ -50,6 +50,7 @@ public class SpineAnimationStateDrawer : PropertyDrawer {
 		SerializedProperty useBlendDurationProp = property.FindPropertyRelative("useBlendDuration");
 		SerializedProperty mixDurationProp = property.FindPropertyRelative("mixDuration");
 		SerializedProperty holdPreviousProp = property.FindPropertyRelative("holdPrevious");
+		SerializedProperty dontPauseWithDirectorProp = property.FindPropertyRelative("dontPauseWithDirector");
 		SerializedProperty eventProp = property.FindPropertyRelative("eventThreshold");
 		SerializedProperty attachmentProp = property.FindPropertyRelative("attachmentThreshold");
 		SerializedProperty drawOrderProp = property.FindPropertyRelative("drawOrderThreshold");
@@ -91,6 +92,9 @@ public class SpineAnimationStateDrawer : PropertyDrawer {
 		singleFieldRect.y += lineHeightWithSpacing;
 		EditorGUI.PropertyField(singleFieldRect, holdPreviousProp);
 
+		singleFieldRect.y += lineHeightWithSpacing;
+		EditorGUI.PropertyField(singleFieldRect, dontPauseWithDirectorProp);
+
 		singleFieldRect.y += lineHeightWithSpacing;
 		EditorGUI.PropertyField(singleFieldRect, eventProp);
 

spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateBehaviour.cs

@@ -53,6 +53,7 @@ namespace Spine.Unity.Playables {
 		#pragma warning restore 414
 		public float mixDuration = 0.1f;
 		public bool holdPrevious = false;
+		public bool dontPauseWithDirector = false;
 
 		[Range(0, 1f)]
 		public float attachmentThreshold = 0.5f;

spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateMixerBehaviour.cs

@@ -41,14 +41,17 @@ namespace Spine.Unity.Playables {
 		public int trackIndex;
 
 		IAnimationStateComponent animationStateComponent;
+		bool dontPauseWithDirector = true;
 		bool isPaused = false;
 		TrackEntry pausedTrackEntry;
 		float previousTimeScale = 1;
 
 		public override void OnBehaviourPause (Playable playable, FrameData info) {
-			if (!isPaused)
-				HandlePause(playable);
-			isPaused = true;
+			if (!dontPauseWithDirector) {
+				if (!isPaused)
+					HandlePause(playable);
+				isPaused = true;
+			}
 		}
 
 		public override void OnBehaviourPlay (Playable playable, FrameData info) {
@@ -119,6 +122,8 @@ namespace Spine.Unity.Playables {
 					ScriptPlayable<SpineAnimationStateBehaviour> inputPlayable = (ScriptPlayable<SpineAnimationStateBehaviour>)playable.GetInput(i);
 					SpineAnimationStateBehaviour clipData = inputPlayable.GetBehaviour();
 
+					dontPauseWithDirector = clipData.dontPauseWithDirector;
+
 					if (clipData.animationReference == null) {
 						float mixDuration = clipData.customDuration ? clipData.mixDuration : state.Data.DefaultMix;
 						state.SetEmptyAnimation(trackIndex, mixDuration);