//以下是抽象类，主要是看着内部只有逻辑的代码出现了Keys这种很具体的类型，不爽。说不定会用作别的。using System.Collections.Generic;namespace KeyboardSynchronizer {public abstract class FuncQueue<T> {public bool Adding { get; private set; }private T toggler;public int Id { get; private set; }public int Index { get; private set; } = -1;public List<T> Parameters { get; } = new List<T>();protected abstract T Empty { get; }/// <summary>/// Insert these to stop adding more parameters and reset this instance./// </summary>public T[] Restarter { get; set; }protected abstract bool IsIndexElement(T t);protected abstract int CreateNewIndex(T t);protected abstract bool Equals(T a, T b);public void Insert(T t) {if (Equals(t, Empty)) {return;}if (IsIndexElement(t)) {if (Adding) {add(t);} else {Index = CreateNewIndex(t);}} else {if (Equals(toggler, Empty)) {toggler = t;} else if (Equals(toggler, t)) {if (Adding) {add(t);} else {if (Index == -1) {Id++;} else {Adding = true;}}} else {if (Adding) {add(t);} else {toggler = t;Id = 0;Index = -1;}}}}private void add(T t) {if (Restarter != null && Restarter.Length > 0 && Parameters.Count + 1 >= Restarter.Length && Equals(Restarter[Restarter.Length - 1], t)) {var i = Parameters.Count - 1;var j = Restarter.Length - 2;for (; i >= 0 && j >= 0;) {if (Equals(Parameters[i], Restarter[j])) {i--;j--;continue;}Parameters.Add(t);return;}Adding = false;Id = 0;toggler = Empty;Index = -1;Parameters.Clear();} else {Parameters.Add(t);}}}
}//以下是实现类，用于自定义快捷键，先按下一个键X一次或多次，用于区分不同功能，然后按一些数字，指定第一个参数，再次按X，结束指定第一个参数，并开始输入更多参数。

using System.Linq;
using System.Windows.Forms;namespace KeyboardSynchronizer {public class KeysQueue : FuncQueue<Keys> {static Keys[] numbers = { Keys.D0, Keys.D1, Keys.D2, Keys.D3, Keys.D4, Keys.D5, Keys.D6, Keys.D7, Keys.D8, Keys.D9 };public KeysQueue(){　　　　　　Restarter = new[] { Keys.S, Keys.T, Keys.O, Keys.P };　　　　 }　　protected override Keys Empty {get { return Keys.None; }}protected override bool Equals(Keys a, Keys b) {return a == b;}protected override int CreateNewIndex(Keys t) {var v = (Index > -1 ? Index.ToString() : string.Empty) + t.ToString()[1];try {return int.Parse(v);} catch {return Index;}}protected override bool IsIndexElement(Keys t) {return numbers.Contains(t);}}
}