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/* $OpenBSD: style.c,v 1.20 2019/05/12 18:16:33 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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/* Mask for bits not included in style. */
#define STYLE_ATTR_MASK (~GRID_ATTR_CHARSET)
/* Default style. */
static struct style style_default = {
{ 0, 0, 8, 8, { { ' ' }, 0, 1, 1 } },
STYLE_ALIGN_DEFAULT,
STYLE_LIST_OFF,
STYLE_RANGE_NONE, 0
};
/*
* Parse an embedded style of the form "fg=colour,bg=colour,bright,...".
* Note that this adds onto the given style, so it must have been initialized
* alredy.
*/
int
style_parse(struct style *sy, const struct grid_cell *base, const char *in)
{
struct style saved;
const char delimiters[] = " ,", *cp;
char tmp[256], *found;
int value;
size_t end;
if (*in == '\0')
return (0);
style_copy(&saved, sy);
do {
while (*in != '\0' && strchr(delimiters, *in) != NULL)
in++;
if (*in == '\0')
break;
end = strcspn(in, delimiters);
if (end > (sizeof tmp) - 1)
goto error;
memcpy(tmp, in, end);
tmp[end] = '\0';
if (strcasecmp(tmp, "default") == 0) {
sy->gc.fg = base->fg;
sy->gc.bg = base->bg;
sy->gc.attr = base->attr;
sy->gc.flags = base->flags;
} else if (strcasecmp(tmp, "nolist") == 0)
sy->list = STYLE_LIST_OFF;
else if (strncasecmp(tmp, "list=", 5) == 0) {
if (strcasecmp(tmp + 5, "on") == 0)
sy->list = STYLE_LIST_ON;
else if (strcasecmp(tmp + 5, "focus") == 0)
sy->list = STYLE_LIST_FOCUS;
else if (strcasecmp(tmp + 5, "left-marker") == 0)
sy->list = STYLE_LIST_LEFT_MARKER;
else if (strcasecmp(tmp + 5, "right-marker") == 0)
sy->list = STYLE_LIST_RIGHT_MARKER;
else
goto error;
} else if (strcasecmp(tmp, "norange") == 0) {
sy->range_type = style_default.range_type;
sy->range_argument = style_default.range_type;
} else if (end > 6 && strncasecmp(tmp, "range=", 6) == 0) {
found = strchr(tmp + 6, '|');
if (found != NULL) {
*found++ = '\0';
if (*found == '\0')
goto error;
for (cp = found; *cp != '\0'; cp++) {
if (!isdigit((u_char)*cp))
goto error;
}
}
if (strcasecmp(tmp + 6, "left") == 0) {
if (found != NULL)
goto error;
sy->range_type = STYLE_RANGE_LEFT;
sy->range_argument = 0;
} else if (strcasecmp(tmp + 6, "right") == 0) {
if (found != NULL)
goto error;
sy->range_type = STYLE_RANGE_RIGHT;
sy->range_argument = 0;
} else if (strcasecmp(tmp + 6, "window") == 0) {
if (found == NULL)
goto error;
sy->range_type = STYLE_RANGE_WINDOW;
sy->range_argument = atoi(found);
}
} else if (strcasecmp(tmp, "noalign") == 0)
sy->align = style_default.align;
else if (end > 6 && strncasecmp(tmp, "align=", 6) == 0) {
if (strcasecmp(tmp + 6, "left") == 0)
sy->align = STYLE_ALIGN_LEFT;
else if (strcasecmp(tmp + 6, "centre") == 0)
sy->align = STYLE_ALIGN_CENTRE;
else if (strcasecmp(tmp + 6, "right") == 0)
sy->align = STYLE_ALIGN_RIGHT;
else
goto error;
} else if (end > 3 && strncasecmp(tmp + 1, "g=", 2) == 0) {
if ((value = colour_fromstring(tmp + 3)) == -1)
goto error;
if (*in == 'f' || *in == 'F') {
if (value != 8)
sy->gc.fg = value;
else
sy->gc.fg = base->fg;
} else if (*in == 'b' || *in == 'B') {
if (value != 8)
sy->gc.bg = value;
else
sy->gc.bg = base->bg;
} else
goto error;
} else if (strcasecmp(tmp, "none") == 0)
sy->gc.attr = 0;
else if (end > 2 && strncasecmp(tmp, "no", 2) == 0) {
if ((value = attributes_fromstring(tmp + 2)) == -1)
goto error;
sy->gc.attr &= ~value;
} else {
if ((value = attributes_fromstring(tmp)) == -1)
goto error;
sy->gc.attr |= value;
}
in += end + strspn(in + end, delimiters);
} while (*in != '\0');
return (0);
error:
style_copy(sy, &saved);
return (-1);
}
/* Convert style to a string. */
const char *
style_tostring(struct style *sy)
{
struct grid_cell *gc = &sy->gc;
int off = 0;
const char *comma = "", *tmp = "";
static char s[256];
char b[16];
*s = '\0';
if (sy->list != STYLE_LIST_OFF) {
if (sy->list == STYLE_LIST_ON)
tmp = "on";
else if (sy->list == STYLE_LIST_FOCUS)
tmp = "focus";
else if (sy->list == STYLE_LIST_LEFT_MARKER)
tmp = "left-marker";
else if (sy->list == STYLE_LIST_RIGHT_MARKER)
tmp = "right-marker";
off += xsnprintf(s + off, sizeof s - off, "%slist=%s", comma,
tmp);
comma = ",";
}
if (sy->range_type != STYLE_RANGE_NONE) {
if (sy->range_type == STYLE_RANGE_LEFT)
tmp = "left";
else if (sy->range_type == STYLE_RANGE_RIGHT)
tmp = "right";
else if (sy->range_type == STYLE_RANGE_WINDOW) {
snprintf(b, sizeof b, "window|%u", sy->range_argument);
tmp = b;
}
off += xsnprintf(s + off, sizeof s - off, "%srange=%s", comma,
tmp);
comma = ",";
}
if (sy->align != STYLE_ALIGN_DEFAULT) {
if (sy->align == STYLE_ALIGN_LEFT)
tmp = "left";
else if (sy->align == STYLE_ALIGN_CENTRE)
tmp = "centre";
else if (sy->align == STYLE_ALIGN_RIGHT)
tmp = "right";
off += xsnprintf(s + off, sizeof s - off, "%salign=%s", comma,
tmp);
comma = ",";
}
if (gc->fg != 8) {
off += xsnprintf(s + off, sizeof s - off, "%sfg=%s", comma,
colour_tostring(gc->fg));
comma = ",";
}
if (gc->bg != 8) {
off += xsnprintf(s + off, sizeof s - off, "%sbg=%s", comma,
colour_tostring(gc->bg));
comma = ",";
}
if (gc->attr != 0 && gc->attr != GRID_ATTR_CHARSET) {
xsnprintf(s + off, sizeof s - off, "%s%s", comma,
attributes_tostring(gc->attr));
comma = ",";
}
if (*s == '\0')
return ("default");
return (s);
}
/* Apply a style. */
void
style_apply(struct grid_cell *gc, struct options *oo, const char *name)
{
struct style *sy;
memcpy(gc, &grid_default_cell, sizeof *gc);
sy = options_get_style(oo, name);
gc->fg = sy->gc.fg;
gc->bg = sy->gc.bg;
gc->attr |= sy->gc.attr;
}
/* Apply a style, updating if default. */
void
style_apply_update(struct grid_cell *gc, struct options *oo, const char *name)
{
struct style *sy;
sy = options_get_style(oo, name);
if (sy->gc.fg != 8)
gc->fg = sy->gc.fg;
if (sy->gc.bg != 8)
gc->bg = sy->gc.bg;
if (sy->gc.attr != 0)
gc->attr |= sy->gc.attr;
}
/* Initialize style from cell. */
void
style_set(struct style *sy, const struct grid_cell *gc)
{
memcpy(sy, &style_default, sizeof *sy);
memcpy(&sy->gc, gc, sizeof sy->gc);
}
/* Copy style. */
void
style_copy(struct style *dst, struct style *src)
{
memcpy(dst, src, sizeof *dst);
}
/* Check if two styles are (visibly) the same. */
int
style_equal(struct style *sy1, struct style *sy2)
{
struct grid_cell *gc1 = &sy1->gc;
struct grid_cell *gc2 = &sy2->gc;
if (gc1->fg != gc2->fg)
return (0);
if (gc1->bg != gc2->bg)
return (0);
if ((gc1->attr & STYLE_ATTR_MASK) != (gc2->attr & STYLE_ATTR_MASK))
return (0);
if (sy1->align != sy2->align)
return (0);
return (1);
}
/* Is this style default? */
int
style_is_default(struct style *sy)
{
return (style_equal(sy, &style_default));
}
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