// THIS FILE IS PART OF SVG PROJECT
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// THE SVG PROJECT IS AN OPENSOURCE LIBRARY LICENSED UNDER THE MS-PL License.
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// COPYRIGHT (C) svg-net. ALL RIGHTS RESERVED.
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// GITHUB: https://github.com/svg-net/SVG
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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namespace AntdUI.Svg
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{
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/// <summary>
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/// Manages access to <see cref="SystemFonts"/> and any privately loaded fonts.
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/// When a font is requested in the render process, if the font is not found as an embedded SvgFont, the render
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/// process will SvgFontManager.FindFont method.
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/// </summary>
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public static class SvgFontManager
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{
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private static readonly Dictionary<string, FontFamily> SystemFonts;
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static SvgFontManager()
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{
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SystemFonts = FontFamily.Families.ToDictionary(ff => ff.Name.ToLower());
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}
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/// <summary>
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/// This method searches a dictionary of fonts (pre loaded with the system fonts). If a
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/// font can't be found and a callback has been provided - then the callback should perform
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/// any validation and return a font (or null if not found/error).
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/// Where a font can't be located it is the responsibility of the caller to perform any
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/// exception handling.
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/// </summary>
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/// <param name="name">A <see cref="string"/> containing the FamilyName of the font.</param>
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/// <returns>An <see cref="FontFamily"/> of the loaded font or null is not located.</returns>
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public static FontFamily? FindFont(string name)
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{
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if (name == null) return null;
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string key = name.ToLower();
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if (SystemFonts.TryGetValue(key, out var ff)) return ff;
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return null;
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}
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}
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}
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