d1ea2ffa60
We call it from a constexpr constructor, so it needs to be constexpr itself. Fixes #4544.
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#include "color.hh"
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#include "exception.hh"
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#include "ranges.hh"
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#include "string_utils.hh"
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#include <cstdio>
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namespace Kakoune
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{
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static constexpr const char* color_names[] = {
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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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"bright-black",
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"bright-red",
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"bright-green",
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"bright-yellow",
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"bright-blue",
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"bright-magenta",
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"bright-cyan",
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"bright-white",
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};
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bool is_color_name(StringView color)
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{
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return contains(color_names, color);
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}
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Color str_to_color(StringView color)
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{
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auto it = find_if(color_names, [&](const char* c){ return color == c; });
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if (it != std::end(color_names))
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return static_cast<Color::NamedColor>(it - color_names);
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auto hval = [&color](char c) -> int
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{
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if (c >= 'A' and c <= 'F')
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return 10 + c - 'A';
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else if (c >= 'a' and c <= 'f')
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return 10 + c - 'a';
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else if (c >= '0' and c <= '9')
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return c - '0';
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throw runtime_error(format("invalid digit '{}' in '{}'", c, color));
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};
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if (color.length() == 10 and color.substr(0_byte, 4_byte) == "rgb:")
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return { (unsigned char)(hval(color[4]) * 16 + hval(color[5])),
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(unsigned char)(hval(color[6]) * 16 + hval(color[7])),
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(unsigned char)(hval(color[8]) * 16 + hval(color[9])) };
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if (color.length() == 13 and color.substr(0_byte, 5_byte) == "rgba:")
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return { (unsigned char)(hval(color[5]) * 16 + hval(color[6])),
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(unsigned char)(hval(color[7]) * 16 + hval(color[8])),
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(unsigned char)(hval(color[9]) * 16 + hval(color[10])),
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(unsigned char)(hval(color[11]) * 16 + hval(color[12])) };
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throw runtime_error(format("unable to parse color: '{}'", color));
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return Color::Default;
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}
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String to_string(Color color)
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{
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if (color.isRGB())
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{
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char buffer[14];
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if (color.a == 255)
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sprintf(buffer, "rgb:%02x%02x%02x", color.r, color.g, color.b);
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else
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sprintf(buffer, "rgba:%02x%02x%02x%02x", color.r, color.g, color.b, color.a);
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return buffer;
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}
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else
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{
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size_t index = static_cast<size_t>(color.color);
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kak_assert(index < std::end(color_names) - std::begin(color_names));
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return color_names[index];
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}
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}
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String option_to_string(Color color)
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{
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return to_string(color);
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}
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Color option_from_string(Meta::Type<Color>, StringView str)
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{
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return str_to_color(str);
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}
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}
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