aa121dcb2f
Use the covariant return type feature of C# 9 to allow method overrides to be more specific about their return type. By exposing this information, e.g. for Widget.Clone(), callers will have more information. This allows various casts to be removed as the information is now available within the type system.
87 lines
2.4 KiB
C#
87 lines
2.4 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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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 OpenRA.Graphics;
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using OpenRA.Primitives;
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using OpenRA.Widgets;
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namespace OpenRA.Mods.Common.Widgets
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{
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public class LabelWithHighlightWidget : LabelWidget
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{
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public Color HighlightColor = ChromeMetrics.Get<Color>("TextHighlightColor");
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readonly CachedTransform<string, (string Text, bool Highlighted)[]> textComponents;
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[ObjectCreator.UseCtor]
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public LabelWithHighlightWidget(ModData modData)
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: base(modData)
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{
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textComponents = new CachedTransform<string, (string, bool)[]>(MakeComponents);
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}
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protected LabelWithHighlightWidget(LabelWithHighlightWidget other)
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: base(other)
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{
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HighlightColor = other.HighlightColor;
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textComponents = new CachedTransform<string, (string, bool)[]>(MakeComponents);
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}
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(string, bool)[] MakeComponents(string text)
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{
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var components = new List<(string, bool)>();
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foreach (var l in text.Split("\\n", StringSplitOptions.None))
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{
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var line = l;
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while (line.Length > 0)
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{
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var highlightStart = line.IndexOf('<');
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var highlightEnd = line.IndexOf('>', 0);
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if (highlightStart > 0 && highlightEnd > highlightStart)
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{
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// Normal line segment before highlight
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var lineNormal = line[..highlightStart];
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components.Add((lineNormal, false));
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// Highlight line segment
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var lineHighlight = line[(highlightStart + 1)..highlightEnd];
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components.Add((lineHighlight, true));
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line = line[(highlightEnd + 1)..];
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}
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else
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{
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// Final normal line segment
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components.Add((line, false));
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break;
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}
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}
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}
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return components.ToArray();
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}
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protected override void DrawInner(string text, SpriteFont font, Color color, int2 position)
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{
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var advance = 0;
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foreach (var c in textComponents.Update(text))
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{
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base.DrawInner(c.Text, font, c.Highlighted ? HighlightColor : color, position + new int2(advance, 0));
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advance += font.Measure(c.Text).X;
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}
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}
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public override LabelWithHighlightWidget Clone() { return new LabelWithHighlightWidget(this); }
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}
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}
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