83 lines
2.3 KiB
C#
83 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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namespace Unity.VisualScripting
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{
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/// <summary>
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/// Branches flow by switching over an enum.
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/// </summary>
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[UnitCategory("Control")]
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[UnitTitle("Switch On Enum")]
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[UnitShortTitle("Switch")]
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[UnitSubtitle("On Enum")]
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[UnitOrder(3)]
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[TypeIcon(typeof(IBranchUnit))]
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public sealed class SwitchOnEnum : Unit, IBranchUnit
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{
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[DoNotSerialize]
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public Dictionary<Enum, ControlOutput> branches { get; private set; }
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[Serialize]
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[Inspectable, UnitHeaderInspectable]
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[TypeFilter(Enums = true, Classes = false, Interfaces = false, Structs = false, Primitives = false)]
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public Type enumType { get; set; }
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/// <summary>
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/// The entry point for the switch.
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/// </summary>
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[DoNotSerialize]
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[PortLabelHidden]
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public ControlInput enter { get; private set; }
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/// <summary>
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/// The enum value on which to switch.
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/// </summary>
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[DoNotSerialize]
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[PortLabelHidden]
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public ValueInput @enum { get; private set; }
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public override bool canDefine => enumType != null && enumType.IsEnum;
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protected override void Definition()
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{
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branches = new Dictionary<Enum, ControlOutput>();
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enter = ControlInput(nameof(enter), Enter);
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@enum = ValueInput(enumType, nameof(@enum));
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Requirement(@enum, enter);
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foreach (var valueByName in EnumUtility.ValuesByNames(enumType))
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{
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var enumName = valueByName.Key;
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var enumValue = valueByName.Value;
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// Just like in C#, duplicate switch labels for the same underlying value is prohibited
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if (!branches.ContainsKey(enumValue))
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{
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var branch = ControlOutput("%" + enumName);
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branches.Add(enumValue, branch);
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Succession(enter, branch);
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}
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}
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}
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public ControlOutput Enter(Flow flow)
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{
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var @enum = (Enum)flow.GetValue(this.@enum, enumType);
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if (branches.ContainsKey(@enum))
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{
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return branches[@enum];
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}
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else
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{
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return null;
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}
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}
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}
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}
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