95 lines
1.8 KiB
C++
95 lines
1.8 KiB
C++
#ifndef color_hh_INCLUDED
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#define color_hh_INCLUDED
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#include "exception.hh"
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#include "hash.hh"
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#include "meta.hh"
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#include "assert.hh"
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namespace Kakoune
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{
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class String;
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class StringView;
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struct Color
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{
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enum NamedColor : unsigned char
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{
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Default,
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Black,
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Red,
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Green,
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Yellow,
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Blue,
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Magenta,
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Cyan,
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White,
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BrightBlack,
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BrightRed,
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BrightGreen,
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BrightYellow,
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BrightBlue,
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BrightMagenta,
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BrightCyan,
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BrightWhite,
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RGB,
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};
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union
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{
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NamedColor color;
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unsigned char a;
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};
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unsigned char r = 0;
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unsigned char g = 0;
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unsigned char b = 0;
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constexpr bool isRGB() const { return a >= RGB; }
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constexpr Color() : Color{Default} {}
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constexpr Color(NamedColor c) : color{c} {}
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constexpr Color(unsigned char r, unsigned char g, unsigned char b, unsigned char a = 255)
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: a{a}, r{r}, g{g}, b{b}
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{
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validate_alpha();
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}
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private:
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constexpr void validate_alpha() {
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static_assert(RGB == 17);
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if (a < RGB)
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throw runtime_error("Colors alpha must be > 16");
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}
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};
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constexpr bool operator==(Color lhs, Color rhs)
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{
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return lhs.color == rhs.color and
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lhs.r == rhs.r and lhs.g == rhs.g and lhs.b == rhs.b;
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}
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constexpr bool operator!=(Color lhs, Color rhs)
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{
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return not (lhs == rhs);
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}
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Color str_to_color(StringView color);
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String to_string(Color color);
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String option_to_string(Color color);
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Color option_from_string(Meta::Type<Color>, StringView str);
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bool is_color_name(StringView color);
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constexpr size_t hash_value(const Color& val)
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{
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return val.isRGB() ?
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hash_values(val.a, val.r, val.g, val.b)
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: hash_value(val.color);
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}
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}
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#endif // color_hh_INCLUDED
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