colors.c File Reference

#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "colors.h"
#include "msg.h"

Include dependency graph for colors.c:

Go to the source code of this file.

Macros
#define	EXTENDED_COLOR
#define	NCOLORS   (sizeof(color_keyword) / sizeof(color_keyword[0]))

Functions
static int32_t	Color_parse_hex (const char *s, int32_t default_color, int *err)
	Parse a color in hex (RRGGBB) or (RGB).
int32_t	a_Color_parse (const char *str, int32_t default_color, int *err)
	Parse a color string.
static int	Color_distance2 (long c1, long c2)
static int	Color_distance3 (long c1, long c2)
int32_t	a_Color_vc (int32_t candidate, int32_t C_txt, int32_t C_lnk, int32_t C_bg)
	Return a suitable "visited link" color.

Variables
static const struct key	color_keyword []

Macro Definition Documentation

EXTENDED_COLOR

#define EXTENDED_COLOR

Definition at line 26 of file colors.c.

NCOLORS

#define NCOLORS   (sizeof(color_keyword) / sizeof(color_keyword[0]))

Definition at line 211 of file colors.c.

Function Documentation

a_Color_parse()

int32_t a_Color_parse	(	const char *	str,
		int32_t	default_color,
		int *	err
	)

Parse a color string.

• If the string begins with # or with 0x, return the color number (with 'RGB' expanded to 'RRGGBB').
• Else search the set of named colors.
• As a last resort, treat it as bare hex as in the first case.

Returns

• Parsed color if successful,
• default_color on error.

"err" argument:

• 0 if a color beginning with '#' is successfully parsed or the color is a recognized word.
• 1 if the color is bare hex or can't be parsed at all.
• 2 if a color beginning with 0[xX] is successfully parsed.

Definition at line 258 of file colors.c.

References _MSG, color_keyword, Color_parse_hex(), dIsspace, dStrAsciiCasecmp(), and NCOLORS.

Referenced by a_Html_color_parse(), parseOption(), CssParser::parseValue(), and CssParser::tokenMatchesProperty().

a_Color_vc()

int32_t a_Color_vc	(	int32_t	candidate,
		int32_t	C_txt,
		int32_t	C_lnk,
		int32_t	C_bg
	)

Return a suitable "visited link" color.

Returns

• if candidate has good contrast with C_txt, C_lnk and C_bg -> candidate
• else another color (from the internal list)

Definition at line 344 of file colors.c.

References _MSG, Color_distance2(), and Color_distance3().

Referenced by Html_tag_open_body().

Color_distance2()

static int Color_distance2 ( long  c1, long  c2  )

static

Definition at line 321 of file colors.c.

Referenced by a_Color_vc().

Color_distance3()

static int Color_distance3 ( long  c1, long  c2  )

static

Definition at line 331 of file colors.c.

Referenced by a_Color_vc().

Color_parse_hex()

static int32_t Color_parse_hex ( const char *  s, int32_t  default_color, int *  err  )

static

Parse a color in hex (RRGGBB) or (RGB).

Returns

• parsed color if successful (err = 0),
• default_color on error (err = 1).

Definition at line 220 of file colors.c.

Referenced by a_Color_parse().

Variable Documentation

color_keyword

const struct key color_keyword[]

static

Referenced by a_Color_parse().