Refactor PowerManager and RequiresPower to use conditions

Instead of Actor.IsDisabled. Added INotifyPowerLevelChanged interface to do so as efficiently as possible.
2017-08-04 13:28:02 +02:00
parent 6c02e3f2b7
commit 786a0eb07f
6 changed files with 122 additions and 49 deletions
--- a/OpenRA.Mods.Common/Traits/Conditions/GrantConditionOnPowerState.cs
+++ b/OpenRA.Mods.Common/Traits/Conditions/GrantConditionOnPowerState.cs
@@ -0,0 +1,88 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Grants condition as long as a valid power state is maintained.")]
+	public class GrantConditionOnPowerStateInfo : ConditionalTraitInfo
+	{
+		[FieldLoader.Require]
+		[GrantedConditionReference]
+		[Desc("Condition to grant.")]
+		public readonly string Condition = null;
+
+		[FieldLoader.Require]
+		[Desc("PowerStates at which the condition is granted. Options are Normal, Low and Critical.")]
+		public readonly PowerState ValidPowerStates = PowerState.Low | PowerState.Critical;
+
+		public override object Create(ActorInitializer init) { return new GrantConditionOnPowerState(init.Self, this); }
+	}
+
+	public class GrantConditionOnPowerState : ConditionalTrait<GrantConditionOnPowerStateInfo>, INotifyOwnerChanged, INotifyPowerLevelChanged
+	{
+		PowerManager playerPower;
+		ConditionManager conditionManager;
+		int conditionToken = ConditionManager.InvalidConditionToken;
+
+		bool validPowerState;
+
+		public GrantConditionOnPowerState(Actor self, GrantConditionOnPowerStateInfo info)
+			: base(info)
+		{
+			playerPower = self.Owner.PlayerActor.Trait<PowerManager>();
+		}
+
+		protected override void Created(Actor self)
+		{
+			base.Created(self);
+
+			conditionManager = self.TraitOrDefault<ConditionManager>();
+
+			Update(self);
+		}
+
+		protected override void TraitEnabled(Actor self)
+		{
+			Update(self);
+		}
+
+		protected override void TraitDisabled(Actor self)
+		{
+			Update(self);
+		}
+
+		void Update(Actor self)
+		{
+			if (conditionManager == null)
+				return;
+
+			validPowerState = !IsTraitDisabled && Info.ValidPowerStates.HasFlag(playerPower.PowerState);
+
+			if (validPowerState && conditionToken == ConditionManager.InvalidConditionToken)
+				conditionToken = conditionManager.GrantCondition(self, Info.Condition);
+			else if (!validPowerState && conditionToken != ConditionManager.InvalidConditionToken)
+				conditionToken = conditionManager.RevokeCondition(self, conditionToken);
+		}
+
+		void INotifyPowerLevelChanged.PowerLevelChanged(Actor self)
+		{
+			Update(self);
+		}
+
+		void INotifyOwnerChanged.OnOwnerChanged(Actor self, Player oldOwner, Player newOwner)
+		{
+			playerPower = newOwner.PlayerActor.Trait<PowerManager>();
+			Update(self);
+		}
+	}
+}