103 lines
2.3 KiB
C#
103 lines
2.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using OpenRA.Traits;
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namespace OpenRA.Activities
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{
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public enum ActivityState { Queued, Active, Done }
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public abstract class Activity
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{
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public ActivityState State { get; private set; }
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public Activity NextActivity { get; set; }
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public bool IsInterruptible { get; protected set; }
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protected bool IsCanceled { get; private set; }
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public Activity()
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{
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IsInterruptible = true;
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}
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public Activity TickOuter(Actor self)
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{
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if (State == ActivityState.Done && Game.Settings.Debug.StrictActivityChecking)
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throw new InvalidOperationException("Actor {0} attempted to tick activity {1} after it had already completed.".F(self, this.GetType()));
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if (State == ActivityState.Queued)
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{
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OnFirstRun(self);
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State = ActivityState.Active;
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}
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var ret = Tick(self);
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if (ret != this)
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{
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State = ActivityState.Done;
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OnLastRun(self);
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}
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return ret;
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}
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public abstract Activity Tick(Actor self);
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/// <summary>
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/// Runs once immediately before the first Tick() execution.
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/// </summary>
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protected virtual void OnFirstRun(Actor self) { }
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/// <summary>
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/// Runs once immediately after the last Tick() execution.
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/// </summary>
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protected virtual void OnLastRun(Actor self) { }
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public virtual bool Cancel(Actor self)
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{
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if (!IsInterruptible)
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return false;
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IsCanceled = true;
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NextActivity = null;
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return true;
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}
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public virtual void Queue(Activity activity)
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{
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if (NextActivity != null)
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NextActivity.Queue(activity);
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else
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NextActivity = activity;
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}
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public virtual IEnumerable<Target> GetTargets(Actor self)
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{
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yield break;
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}
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}
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public static class ActivityExts
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{
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public static IEnumerable<Target> GetTargetQueue(this Actor self)
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{
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return self.CurrentActivity
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.Iterate(u => u.NextActivity)
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.TakeWhile(u => u != null)
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.SelectMany(u => u.GetTargets(self));
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}
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}
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}
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