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// Color class.
#ifndef FISH_COLOR_H
#define FISH_COLOR_H
#include <string.h>
#include <string>
#include "common.h"
/* 24 bit color */
struct color24_t
{
unsigned char rgb[3];
};
/* A type that represents a color. We work hard to keep it at a size of 4 bytes. */
class rgb_color_t
{
/* Types */
enum
{
type_none,
type_named,
type_rgb,
type_normal,
type_reset
};
unsigned char type:4;
/* Flags */
enum
{
flag_bold = 1 << 0,
flag_underline = 1 << 1
};
unsigned char flags:4;
union
{
unsigned char name_idx; //0-10
color24_t color;
} data;
/** Try parsing a special color name like "normal" */
bool try_parse_special(const wcstring &str);
/** Try parsing an rgb color like "#F0A030" */
bool try_parse_rgb(const wcstring &str);
/** Try parsing an explicit color name like "magenta" */
bool try_parse_named(const wcstring &str);
/* Parsing entry point */
void parse(const wcstring &str);
/** Private constructor */
explicit rgb_color_t(unsigned char t, unsigned char i=0);
public:
/** Default constructor of type none */
explicit rgb_color_t() : type(type_none), flags(), data() {}
/** Parse a color from a string */
explicit rgb_color_t(const wcstring &str);
explicit rgb_color_t(const std::string &str);
/** Returns white */
static rgb_color_t white();
/** Returns black */
static rgb_color_t black();
/** Returns the reset special color */
static rgb_color_t reset();
/** Returns the normal special color */
static rgb_color_t normal();
/** Returns the none special color */
static rgb_color_t none();
/** Returns whether the color is the normal special color */
bool is_normal(void) const
{
return type == type_normal;
}
/** Returns whether the color is the reset special color */
bool is_reset(void) const
{
return type == type_reset;
}
/** Returns whether the color is the none special color */
bool is_none(void) const
{
return type == type_none;
}
/** Returns whether the color is a named color (like "magenta") */
bool is_named(void) const
{
return type == type_named;
}
/** Returns whether the color is specified via RGB components */
bool is_rgb(void) const
{
return type == type_rgb;
}
/** Returns whether the color is special, that is, not rgb or named */
bool is_special(void) const
{
return type != type_named && type != type_rgb;
}
/** Returns a description of the color */
wcstring description() const;
/** Returns the name index for the given color. Requires that the color be named or RGB. */
unsigned char to_name_index() const;
/** Returns the term256 index for the given color. Requires that the color be RGB. */
unsigned char to_term256_index() const;
/** Returns the 24 bit color for the given color. Requires that the color be RGB. */
color24_t to_color24() const;
/** Returns whether the color is bold */
bool is_bold() const
{
return !!(flags & flag_bold);
}
/** Set whether the color is bold */
void set_bold(bool x)
{
if (x) flags |= flag_bold;
else flags &= ~flag_bold;
}
/** Returns whether the color is underlined */
bool is_underline() const
{
return !!(flags & flag_underline);
}
/** Set whether the color is underlined */
void set_underline(bool x)
{
if (x) flags |= flag_underline;
else flags &= ~flag_underline;
}
/** Compare two colors for equality */
bool operator==(const rgb_color_t &other) const
{
return type == other.type && ! memcmp(&data, &other.data, sizeof data);
}
/** Compare two colors for inequality */
bool operator!=(const rgb_color_t &other) const
{
return !(*this == other);
}
/** Returns the names of all named colors */
static wcstring_list_t named_color_names(void);
};
#endif
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