107 lines
2.8 KiB
C#
107 lines
2.8 KiB
C#
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using System;
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namespace Unity.VisualScripting
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{
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public abstract class StateTransition : GraphElement<StateGraph>, IStateTransition
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{
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public class DebugData : IStateTransitionDebugData
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{
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public Exception runtimeException { get; set; }
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public int lastBranchFrame { get; set; }
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public float lastBranchTime { get; set; }
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}
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protected StateTransition() { }
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protected StateTransition(IState source, IState destination)
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{
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Ensure.That(nameof(source)).IsNotNull(source);
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Ensure.That(nameof(destination)).IsNotNull(destination);
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if (source.graph != destination.graph)
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{
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throw new NotSupportedException("Cannot create transitions across state graphs.");
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}
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this.source = source;
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this.destination = destination;
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}
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public IGraphElementDebugData CreateDebugData()
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{
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return new DebugData();
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}
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public override int dependencyOrder => 1;
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[Serialize]
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public IState source { get; internal set; }
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[Serialize]
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public IState destination { get; internal set; }
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public override void Instantiate(GraphReference instance)
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{
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base.Instantiate(instance);
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if (this is IGraphEventListener listener && instance.GetElementData<State.Data>(source).isActive)
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{
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listener.StartListening(instance);
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}
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}
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public override void Uninstantiate(GraphReference instance)
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{
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if (this is IGraphEventListener listener)
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{
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listener.StopListening(instance);
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}
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base.Uninstantiate(instance);
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}
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#region Lifecycle
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public void Branch(Flow flow)
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{
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if (flow.enableDebug)
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{
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var editorData = flow.stack.GetElementDebugData<DebugData>(this);
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editorData.lastBranchFrame = EditorTimeBinding.frame;
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editorData.lastBranchTime = EditorTimeBinding.time;
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}
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try
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{
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source.OnExit(flow, StateExitReason.Branch);
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}
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catch (Exception ex)
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{
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source.HandleException(flow.stack, ex);
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throw;
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}
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source.OnBranchTo(flow, destination);
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try
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{
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destination.OnEnter(flow, StateEnterReason.Branch);
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}
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catch (Exception ex)
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{
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destination.HandleException(flow.stack, ex);
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throw;
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}
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}
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public abstract void OnEnter(Flow flow);
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public abstract void OnExit(Flow flow);
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#endregion
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}
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}
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