Initial Commit

Library/PackageCache/com.unity.timeline@1.5.4/Editor/State/ISequenceState.cs

@@ -0,0 +1,102 @@
+using System;
+using UnityEngine.Playables;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    interface ISequenceState : IDisposable
+    {
+        TimelineAsset asset { get; }
+        PlayableDirector director { get; }
+        TimelineClip hostClip { get; }
+        double start { get; }
+        double timeScale { get; }
+        double duration { get; }
+        bool isReadOnly { get; }
+        bool isAssetOnly { get; set; }
+        TimelineAssetViewModel viewModel { get; }
+        double time { get; set; }
+        int frame { get; set; }
+        float frameRate { get; set; }
+
+        Range GetEvaluableRange();
+        double ToGlobalTime(double t);
+        double ToLocalTime(double t);
+        void ResetIsReadOnly();
+    }
+
+    /**
+     * This class is used to hold default values for an implementation of ISequenceState.
+     * It could be removed in a phase 2, but it is currently used to limit the scope of
+     * this refactoring: it allows client code to access sequence info without having to
+     * worry about `currentSequence` being null.
+     * In the future this should be removed and we should pass around the correct data
+     * structure (i.e. SequenceState OR WindowState) based on the situation.
+     */
+    class NullSequenceState : ISequenceState
+    {
+        public TimelineAsset asset { get { return null; } }
+        public PlayableDirector director { get { return null; } }
+        public TimelineClip hostClip { get { return null; } }
+        public double start { get { return 0.0; } }
+        public double timeScale { get { return 1.0; } }
+        public double duration { get { return 0.0; } }
+        public bool isReadOnly { get { return false; } }
+        public bool isAssetOnly { get { return false; } set { } }
+
+        TimelineAssetViewModel m_ViewModel;
+
+        public TimelineAssetViewModel viewModel
+        {
+            get
+            {
+                if (m_ViewModel == null)
+                    m_ViewModel = TimelineWindowViewPrefs.CreateUnassociatedViewModel();
+                return m_ViewModel;
+            }
+        }
+
+        public double time
+        {
+            get { return 0.0; }
+            set { /* NO-OP*/ }
+        }
+
+        public int frame
+        {
+            get { return 0; }
+            set { /* NO-OP*/ }
+        }
+
+        public float frameRate
+        {
+            get { return TimelineAsset.EditorSettings.kDefaultFps; }
+            set { /* NO-OP*/ }
+        }
+
+        public Range GetEvaluableRange()
+        {
+            return new Range();
+        }
+
+        public double ToGlobalTime(double t)
+        {
+            return t;
+        }
+
+        public double ToLocalTime(double t)
+        {
+            return t;
+        }
+
+        public void ResetIsReadOnly()
+        {
+            // NO-OP
+        }
+
+        public void Dispose()
+        {
+            // NO-OP
+        }
+    }
+}