mirror of
https://github.com/ncblakely/GiantsTools
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134 lines
3.7 KiB
C#
134 lines
3.7 KiB
C#
// DirectXTK MakeSpriteFont tool
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkId=248929
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using System;
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using System.Linq;
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using System.ComponentModel;
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using System.Globalization;
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using System.Collections.Generic;
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namespace MakeSpriteFont
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{
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// Describes a range of consecutive characters that should be included in the font.
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[TypeConverter(typeof(CharacterRegionTypeConverter))]
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public class CharacterRegion
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{
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// Constructor.
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public CharacterRegion(char start, char end)
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{
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if (start > end)
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throw new ArgumentException();
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this.Start = start;
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this.End = end;
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}
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// Fields.
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public char Start;
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public char End;
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// Enumerates all characters within the region.
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public IEnumerable<Char> Characters
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{
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get
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{
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for (char c = Start; c <= End; c++)
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{
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yield return c;
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}
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}
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}
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// Flattens a list of character regions into a combined list of individual characters.
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public static IEnumerable<Char> Flatten(IEnumerable<CharacterRegion> regions)
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{
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if (regions.Any())
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{
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// If we have any regions, flatten them and remove duplicates.
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return regions.SelectMany(region => region.Characters).Distinct();
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}
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else
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{
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// If no regions were specified, use the default.
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return defaultRegion.Characters;
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}
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}
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// Default to just the base ASCII character set.
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static CharacterRegion defaultRegion = new CharacterRegion(' ', '~');
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}
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// Custom type converter enables CommandLineParser to parse CharacterRegion command line options.
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public class CharacterRegionTypeConverter : TypeConverter
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{
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
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{
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return sourceType == typeof(string);
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}
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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// Input must be a string.
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string source = value as string;
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if (string.IsNullOrEmpty(source))
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{
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throw new ArgumentException();
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}
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// Supported input formats:
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// A
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// A-Z
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// 32-127
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// 0x20-0x7F
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char[] split = source.Split('-')
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.Select(ConvertCharacter)
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.ToArray();
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switch (split.Length)
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{
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case 1:
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// Only a single character (eg. "a").
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return new CharacterRegion(split[0], split[0]);
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case 2:
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// Range of characters (eg. "a-z").
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return new CharacterRegion(split[0], split[1]);
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default:
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throw new ArgumentException();
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}
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}
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static char ConvertCharacter(string value)
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{
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if (value.Length == 1)
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{
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// Single character directly specifies a codepoint.
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return value[0];
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}
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else
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{
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// Otherwise it must be an integer (eg. "32" or "0x20").
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return (char)(int)intConverter.ConvertFromInvariantString(value);
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}
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}
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static TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
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}
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}
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