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/* $OpenBSD$ */
/*
* Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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 <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Still hardcoded:
* - bracket paste (sent if application asks for it);
* - mouse (under kmous capability);
* - focus events (under focus-events option);
* - default colours (under AX or op capabilities);
* - AIX colours (under colors >= 16);
* - alternate escape (under XT).
*
* Also:
* - XT is used to decide whether to send DA and XDA;
* - DECSLRM and DECFRA use a flag instead of capabilities;
* - UTF-8 is a separate flag on the client; needed for unattached clients.
*/
/* A named terminal feature. */
struct tty_feature {
const char *name;
const char **capabilities;
int flags;
};
/* Terminal has xterm(1) title setting. */
static const char *tty_feature_title_capabilities[] = {
"tsl=\\E]0;", /* should be using TS really */
"fsl=\\a",
NULL
};
static struct tty_feature tty_feature_title = {
"title",
tty_feature_title_capabilities,
0
};
/* Terminal can set the clipboard with OSC 52. */
static const char *tty_feature_clipboard_capabilities[] = {
"Ms=\\E]52;%p1%s;%p2%s\\a",
NULL
};
static struct tty_feature tty_feature_clipboard = {
"clipboard",
tty_feature_clipboard_capabilities,
0
};
/*
* Terminal supports RGB colour. This replaces setab and setaf also since
* terminals with RGB have versions that do not allow setting colours from the
* 256 palette.
*/
static const char *tty_feature_rgb_capabilities[] = {
"AX",
"setrgbf=\\E[38;2;%p1%d;%p2%d;%p3%dm",
"setrgbb=\\E[48;2;%p1%d;%p2%d;%p3%dm",
"setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
"setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
NULL
};
static struct tty_feature tty_feature_rgb = {
"RGB",
tty_feature_rgb_capabilities,
(TERM_256COLOURS|TERM_RGBCOLOURS)
};
/* Terminal supports 256 colours. */
static const char *tty_feature_256_capabilities[] = {
"AX",
"setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
"setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
NULL
};
static struct tty_feature tty_feature_256 = {
"256",
tty_feature_256_capabilities,
TERM_256COLOURS
};
/* Terminal supports overline. */
static const char *tty_feature_overline_capabilities[] = {
"Smol=\\E[53m",
NULL
};
static struct tty_feature tty_feature_overline = {
"overline",
tty_feature_overline_capabilities,
0
};
/* Terminal supports underscore styles. */
static const char *tty_feature_usstyle_capabilities[] = {
"Smulx=\E[4::%p1%dm",
"Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m",
NULL
};
static struct tty_feature tty_feature_usstyle = {
"usstyle",
tty_feature_usstyle_capabilities,
0
};
/* Terminal supports cursor styles. */
static const char *tty_feature_cstyle_capabilities[] = {
"Ss=\\E[%p1%d q",
"Se=\\E[2 q",
NULL
};
static struct tty_feature tty_feature_cstyle = {
"cstyle",
tty_feature_cstyle_capabilities,
0
};
/* Terminal supports cursor colours. */
static const char *tty_feature_ccolour_capabilities[] = {
"Cs=\\E]12;%p1%s\\a",
"Cr=\\E]112\\a",
NULL
};
static struct tty_feature tty_feature_ccolour = {
"ccolour",
tty_feature_ccolour_capabilities,
0
};
/* Terminal supports synchronized updates. */
static const char *tty_feature_sync_capabilities[] = {
"Sync=\\EP=%p1%ds\\E\\\\",
NULL
};
static struct tty_feature tty_feature_sync = {
"sync",
tty_feature_sync_capabilities,
0
};
/* Terminal supports DECSLRM margins. */
static struct tty_feature tty_feature_margins = {
"margins",
NULL,
TERM_DECSLRM
};
/* Terminal supports DECFRA rectangle fill. */
static struct tty_feature tty_feature_rectfill = {
"rectfill",
NULL,
TERM_DECFRA
};
/* Available terminal features. */
static const struct tty_feature *tty_features[] = {
&tty_feature_256,
&tty_feature_clipboard,
&tty_feature_ccolour,
&tty_feature_cstyle,
&tty_feature_margins,
&tty_feature_overline,
&tty_feature_rectfill,
&tty_feature_rgb,
&tty_feature_sync,
&tty_feature_title,
&tty_feature_usstyle
};
void
tty_add_features(int *feat, const char *s, const char *separators)
{
const struct tty_feature *tf;
char *next, *loop, *copy;
u_int i;
loop = copy = xstrdup(s);
while ((next = strsep(&loop, separators)) != NULL) {
for (i = 0; i < nitems(tty_features); i++) {
tf = tty_features[i];
if (strcasecmp(tf->name, next) == 0)
break;
}
if (i == nitems(tty_features)) {
log_debug("unknown terminal feature: %s", next);
break;
}
if (~(*feat) & (1 << i)) {
log_debug("adding terminal feature: %s", tf->name);
(*feat) |= (1 << i);
}
}
free(copy);
}
const char *
tty_get_features(int feat)
{
const struct tty_feature *tf;
static char s[512];
u_int i;
*s = '\0';
for (i = 0; i < nitems(tty_features); i++) {
if (~feat & (1 << i))
continue;
tf = tty_features[i];
strlcat(s, tf->name, sizeof s);
strlcat(s, ",", sizeof s);
}
if (*s != '\0')
s[strlen(s) - 1] = '\0';
return (s);
}
int
tty_apply_features(struct tty_term *term, int feat)
{
const struct tty_feature *tf;
const char **capability;
u_int i;
if (feat == 0)
return (0);
log_debug("applying terminal features: %s", tty_get_features(feat));
for (i = 0; i < nitems(tty_features); i++) {
if ((term->features & (1 << i)) || (~feat & (1 << i)))
continue;
tf = tty_features[i];
log_debug("applying terminal feature: %s", tf->name);
if (tf->capabilities != NULL) {
capability = tf->capabilities;
while (*capability != NULL) {
log_debug("adding capability: %s", *capability);
tty_term_apply(term, *capability, 1);
capability++;
}
}
term->flags |= tf->flags;
}
if ((term->features | feat) == term->features)
return (0);
term->features |= feat;
return (1);
}