Return to style.c CVS log

Up to [local] / src / usr.bin / tmux

Instead of representing colours in several different forms with various
cell flags, convert to use an int with flags marking 256 or RGB colours
in the top byte (except in cells, which we don't want to make any
bigger). From Brad Town.

/* $OpenBSD: style.c,v 1.10 2016/07/15 00:42:56 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 * Copyright (c) 2014 Tiago Cunha <tcunha@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <string.h>

#include "tmux.h"

/* Parse an embedded style of the form "fg=colour,bg=colour,bright,...". */
int
style_parse(const struct grid_cell *defgc, struct grid_cell *gc,
    const char *in)
{
	struct grid_cell	savedgc;
	const char		delimiters[] = " ,";
	char			tmp[32];
	int			val;
	size_t			end;
	int			fg, bg;
	u_char			attr, flags;

	if (*in == '\0')
		return (0);
	if (strchr(delimiters, in[strlen(in) - 1]) != NULL)
		return (-1);
	memcpy(&savedgc, gc, sizeof savedgc);

	fg = gc->fg;
	bg = gc->bg;
	attr = gc->attr;
	flags = gc->flags;
	do {
		end = strcspn(in, delimiters);
		if (end > (sizeof tmp) - 1)
			goto error;
		memcpy(tmp, in, end);
		tmp[end] = '\0';

		if (strcasecmp(tmp, "default") == 0) {
			fg = defgc->fg;
			bg = defgc->bg;
			attr = defgc->attr;
			flags = defgc->flags;
		} else if (end > 3 && strncasecmp(tmp + 1, "g=", 2) == 0) {
			if ((val = colour_fromstring(tmp + 3)) == -1)
				goto error;
			if (*in == 'f' || *in == 'F') {
				if (val != 8)
					fg = val;
				else
					fg = defgc->fg;
			} else if (*in == 'b' || *in == 'B') {
				if (val != 8)
					bg = val;
				else
					bg = defgc->bg;
			} else
				goto error;
		} else if (strcasecmp(tmp, "none") == 0)
			attr = 0;
		else if (end > 2 && strncasecmp(tmp, "no", 2) == 0) {
			if ((val = attributes_fromstring(tmp + 2)) == -1)
				goto error;
			attr &= ~val;
		} else {
			if ((val = attributes_fromstring(tmp)) == -1)
				goto error;
			attr |= val;
		}

		in += end + strspn(in + end, delimiters);
	} while (*in != '\0');
	gc->fg = fg;
	gc->bg = bg;
	gc->attr = attr;
	gc->flags = flags;

	return (0);

error:
	memcpy(gc, &savedgc, sizeof *gc);
	return (-1);
}

/* Convert style to a string. */
const char *
style_tostring(struct grid_cell *gc)
{
	int		 off = 0, comma = 0;
	static char	 s[256];

	*s = '\0';

	if (gc->fg != 8) {
		off += xsnprintf(s, sizeof s, "fg=%s", colour_tostring(gc->fg));
		comma = 1;
	}

	if (gc->bg != 8) {
		off += xsnprintf(s + off, sizeof s - off, "%sbg=%s",
		    comma ? "," : "", colour_tostring(gc->bg));
		comma = 1;
	}

	if (gc->attr != 0 && gc->attr != GRID_ATTR_CHARSET) {
		xsnprintf(s + off, sizeof s - off, "%s%s",
		    comma ? "," : "", attributes_tostring(gc->attr));
	}

	if (*s == '\0')
		return ("default");
	return (s);
}

/* Synchronize new -style option with the old one. */
void
style_update_new(struct options *oo, const char *name, const char *newname)
{
	int			 value;
	struct grid_cell	*gc;
	struct options_entry	*o;

	/* It's a colour or attribute, but with no -style equivalent. */
	if (newname == NULL)
		return;

	o = options_find1(oo, newname);
	if (o == NULL)
		o = options_set_style(oo, newname, "default", 0);
	gc = &o->style;

	o = options_find1(oo, name);
	if (o == NULL)
		o = options_set_number(oo, name, 8);
	value = o->num;

	if (strstr(name, "-bg") != NULL)
		gc->bg = value;
	else if (strstr(name, "-fg") != NULL)
		gc->fg = value;
	else if (strstr(name, "-attr") != NULL)
		gc->attr = value;
}

/* Synchronize all the old options with the new -style one. */
void
style_update_old(struct options *oo, const char *name, struct grid_cell *gc)
{
	char	newname[128];
	int	size;

	size = strrchr(name, '-') - name;

	xsnprintf(newname, sizeof newname, "%.*s-bg", size, name);
	options_set_number(oo, newname, gc->bg);

	xsnprintf(newname, sizeof newname, "%.*s-fg", size, name);
	options_set_number(oo, newname, gc->fg);

	xsnprintf(newname, sizeof newname, "%.*s-attr", size, name);
	options_set_number(oo, newname, gc->attr);
}

/* Apply a style. */
void
style_apply(struct grid_cell *gc, struct options *oo, const char *name)
{
	struct grid_cell	*gcp;

	memcpy(gc, &grid_default_cell, sizeof *gc);
	gcp = options_get_style(oo, name);
	gc->fg = gcp->fg;
	gc->bg = gcp->bg;
	gc->attr |= gcp->attr;
}

/* Apply a style, updating if default. */
void
style_apply_update(struct grid_cell *gc, struct options *oo, const char *name)
{
	struct grid_cell	*gcp;

	gcp = options_get_style(oo, name);
	if (gcp->fg != 8)
		gc->fg = gcp->fg;
	if (gcp->bg != 8)
		gc->bg = gcp->bg;
	if (gcp->attr != 0)
		gc->attr |= gcp->attr;
}

/* Check if two styles are the same. */
int
style_equal(const struct grid_cell *gc1, const struct grid_cell *gc2)
{
	return (gc1->fg == gc2->fg &&
	    gc1->bg == gc2->bg &&
	    (gc1->flags & ~GRID_FLAG_PADDING) ==
	    (gc2->flags & ~GRID_FLAG_PADDING) &&
	    (gc1->attr & ~GRID_ATTR_CHARSET) ==
	    (gc2->attr & ~GRID_ATTR_CHARSET));
}