shithub: rioc

ref: 05fa071dc3ea7a5208f3747ac9d93f4d3e256b2f
dir: /colors.c/

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <cursor.h>
#include <mouse.h>
#include <keyboard.h>
#include <frame.h>
#include <fcall.h>
#include "dat.h"
#include "fns.h"

Image*
gethexcolor(Window *w, ulong val)
{
	int i;
	Image *img;
	for(i=0; i<w->nhexcols; i++)
	if(w->hexcols[i].val == val)
		return w->hexcols[i].img;

	if(w->nhexcols >= w->maxhexcols) {
		w->maxhexcols += 32;
		w->hexcols = erealloc(w->hexcols, w->maxhexcols*sizeof(Hexcolor));
	}

	img = allocimage(display, Rect(0,0,1,1), RGBA32, 1, val);
	if(img == nil)
		return nil;

	w->hexcols[w->nhexcols].val = val;
	w->hexcols[w->nhexcols].img = img;
	w->nhexcols++;
	return img;
}

static ulong
parsecolorvalue(char **s)
{
	char *p, *e;
	ulong c;

	p = *s;
	if(strncmp(p, "0x", 2) == 0) {
		c = strtoul(p, &e, 16);
		if(e > p) {
			*s = e;
			return c;
		}
		return DEFAULT;
	}
	if(strncmp(p, "red", 3) == 0) {
		*s = p + 3;
		return RED;
	}
	if(strncmp(p, "green", 5) == 0) {
		*s = p + 5;
		return GREEN;
	}
	if(strncmp(p, "blue", 4) == 0) {
		*s = p + 4;
		return BLUE;
	}
	if(strncmp(p, "cyan", 4) == 0) {
		*s = p + 4;
		return CYAN;
	}
	if(strncmp(p, "magenta", 7) == 0) {
		*s = p + 7;
		return MAGENTA;
	}
	if(strncmp(p, "yellow", 6) == 0) {
		*s = p + 6;
		return YELLOW;
	}
	if(strncmp(p, "black", 5) == 0) {
		*s = p + 5;
		return BLACK;
	}
	if(strncmp(p, "white", 5) == 0) {
		*s = p + 5;
		return WHITE;
	}
	return DEFAULT;
}
 
int
parsecolor(char *cmd, int *fg, int *bg, char **text)
{
	*fg = DEFAULT;
	*bg = DEFAULT;
    
	/* Skip whitespace */
	while(*cmd == ' ' || *cmd == '\t')
		cmd++;
        
	/* If no color indicators, just return the text as-is */
	if(*cmd != '+' && *cmd != '-') {
		*text = cmd;
		return 0;
	}
    
	/* Check for foreground */
	if(*cmd == '+') {
		cmd++;
		*fg = parsecolorvalue(&cmd);
        
        /* Only check for background if explicitly marked */
		if(*cmd == '-') {
			cmd++;
			*bg = parsecolorvalue(&cmd);
		}
	}
	/* Check for background only */
	else if(*cmd == '-') {
		cmd++;
		*bg = parsecolorvalue(&cmd);
	}
    
	while(*cmd == ' ' || *cmd == '\t')
		cmd++;
        
	*text = cmd;
	return 0;
}