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75 lines
2.0 KiB
C#
75 lines
2.0 KiB
C#
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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System.Collections.Generic;
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using osu.Framework.Input.Events;
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using osu.Game.Graphics.UserInterface;
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using osuTK.Input;
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namespace osu.Game.Overlays.Chat
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{
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public class ChatRecentTextBox : FocusedTextBox
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{
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private readonly List<string> messageHistory = new List<string>();
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private int messageIndex = -1;
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private string originalMessage = string.Empty;
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protected override bool OnKeyDown(KeyDownEvent e)
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{
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/* Behavior:
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* add when on last element -> last element stays
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* subtract when on first element -> sets to original text
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* reset indexing when Text is set to Empty
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*/
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switch (e.Key)
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{
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case Key.Up:
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if (messageIndex == -1)
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originalMessage = Text;
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if (messageIndex == messageHistory.Count - 1)
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return true;
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Text = messageHistory[++messageIndex];
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return true;
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case Key.Down:
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if (messageIndex == -1)
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return true;
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if (messageIndex == 0)
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{
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messageIndex = -1;
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Text = originalMessage;
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return true;
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}
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Text = messageHistory[--messageIndex];
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return true;
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}
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bool onKeyDown = base.OnKeyDown(e);
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if (string.IsNullOrEmpty(Text))
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messageIndex = -1;
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return onKeyDown;
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}
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protected override void Commit()
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{
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if (!string.IsNullOrEmpty(Text))
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messageHistory.Insert(0, Text);
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messageIndex = -1;
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base.Commit();
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}
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}
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}
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