kakoune/src/color.cc

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#include "color.hh"
#include "exception.hh"
#include "ranges.hh"
#include "regex.hh"
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#include <cstdio>
namespace Kakoune
{
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static constexpr const char* color_names[] = {
"default",
"black",
"red",
"green",
"yellow",
"blue",
"magenta",
"cyan",
"white",
};
bool is_color_name(StringView color)
{
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return contains(color_names, color);
}
Color str_to_color(StringView color)
{
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auto it = find_if(color_names, [&](const char* c){ return color == c; });
if (it != std::end(color_names))
return static_cast<Color::NamedColor>(it - color_names);
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auto hval = [&color](char c) -> int
{
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if (c >= 'A' and c <= 'F')
return 10 + c - 'A';
else if (c >= 'a' and c <= 'f')
return 10 + c - 'a';
else if (c >= '0' and c <= '9')
return c - '0';
throw runtime_error(format("invalid digit '{}' in '{}'", c, color));
};
if (color.length() == 10 and color.substr(0_byte, 4_byte) == "rgb:")
return { (unsigned char)(hval(color[4]) * 16 + hval(color[5])),
(unsigned char)(hval(color[6]) * 16 + hval(color[7])),
(unsigned char)(hval(color[8]) * 16 + hval(color[9])) };
throw runtime_error(format("Unable to parse color '{}'", color));
return Color::Default;
}
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String color_to_str(Color color)
{
if (color.color == Color::RGB)
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{
char buffer[11];
sprintf(buffer, "rgb:%02x%02x%02x", color.r, color.g, color.b);
return buffer;
}
else
{
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size_t index = static_cast<size_t>(color.color);
kak_assert(index < std::end(color_names) - std::begin(color_names));
return color_names[index];
}
}
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String option_to_string(Color color)
{
return color_to_str(color);
}
void option_from_string(StringView str, Color& color)
{
color = str_to_color(str);
}
}