path: root/tty-features.c

/* $OpenBSD$ */

/*
 * 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>

#if defined(HAVE_CURSES_H)
#include <curses.h>
#elif defined(HAVE_NCURSES_H)
#include <ncurses.h>
#endif

#include "tmux.h"

/*
 * Still hardcoded:
 * - default colours (under AX or op capabilities);
 * - AIX colours (under colors >= 16);
 * - alternate escape (if terminal is VT100-like).
 *
 * Also:
 * - DECFRA uses 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 *const	*capabilities;
	int			 flags;
};

/* Terminal has xterm(1) title setting. */
static const char *const tty_feature_title_capabilities[] = {
	"tsl=\\E]0;", /* should be using TS really */
	"fsl=\\a",
	NULL
};
static const struct tty_feature tty_feature_title = {
	"title",
	tty_feature_title_capabilities,
	0
};

/* Terminal has OSC 7 working directory. */
static const char *const tty_feature_osc7_capabilities[] = {
	"Swd=\\E]7;",
	"fsl=\\a",
	NULL
};
static const struct tty_feature tty_feature_osc7 = {
	"osc7",
	tty_feature_osc7_capabilities,
	0
};

/* Terminal has mouse support. */
static const char *const tty_feature_mouse_capabilities[] = {
	"kmous=\\E[M",
	NULL
};
static const struct tty_feature tty_feature_mouse = {
	"mouse",
	tty_feature_mouse_capabilities,
	0
};

/* Terminal can set the clipboard with OSC 52. */
static const char *const tty_feature_clipboard_capabilities[] = {
	"Ms=\\E]52;%p1%s;%p2%s\\a",
	NULL
};
static const struct tty_feature tty_feature_clipboard = {
	"clipboard",
	tty_feature_clipboard_capabilities,
	0
};

/* Terminal supports OSC 8 hyperlinks. */
static const char *tty_feature_hyperlinks_capabilities[] = {
#if defined (__OpenBSD__) || (defined(NCURSES_VERSION_MAJOR) && \
	(NCURSES_VERSION_MAJOR > 5 || \
	(NCURSES_VERSION_MAJOR == 5 && NCURSES_VERSION_MINOR > 8)))
	"*:Hls=\\E]8;%?%p1%l%tid=%p1%s%;;%p2%s\\E\\\\",
#endif
	NULL
};
static const struct tty_feature tty_feature_hyperlinks = {
	"hyperlinks",
	tty_feature_hyperlinks_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 *const 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 const struct tty_feature tty_feature_rgb = {
	"RGB",
	tty_feature_rgb_capabilities,
	TERM_256COLOURS|TERM_RGBCOLOURS
};

/* Terminal supports 256 colours. */
static const char *const 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 const struct tty_feature tty_feature_256 = {
	"256",
	tty_feature_256_capabilities,
	TERM_256COLOURS
};

/* Terminal supports overline. */
static const char *const tty_feature_overline_capabilities[] = {
	"Smol=\\E[53m",
	NULL
};
static const struct tty_feature tty_feature_overline = {
	"overline",
	tty_feature_overline_capabilities,
	0
};

/* Terminal supports underscore styles. */
static const char *const tty_feature_usstyle_capabilities[] = {
	"Smulx=\\E[4::%p1%dm",
	"Setulc=\\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m",
	"Setulc1=\\E[58::5::%p1%dm",
	"ol=\\E[59m",
	NULL
};
static const struct tty_feature tty_feature_usstyle = {
	"usstyle",
	tty_feature_usstyle_capabilities,
	0
};

/* Terminal supports bracketed paste. */
static const char *const tty_feature_bpaste_capabilities[] = {
	"Enbp=\\E[?2004h",
	"Dsbp=\\E[?2004l",
	NULL
};
static const struct tty_feature tty_feature_bpaste = {
	"bpaste",
	tty_feature_bpaste_capabilities,
	0
};

/* Terminal supports focus reporting. */
static const char *const tty_feature_focus_capabilities[] = {
	"Enfcs=\\E[?1004h",
	"Dsfcs=\\E[?1004l",
	NULL
};
static const struct tty_feature tty_feature_focus = {
	"focus",
	tty_feature_focus_capabilities,
	0
};

/* Terminal supports cursor styles. */
static const char *const tty_feature_cstyle_capabilities[] = {
	"Ss=\\E[%p1%d q",
	"Se=\\E[2 q",
	NULL
};
static const struct tty_feature tty_feature_cstyle = {
	"cstyle",
	tty_feature_cstyle_capabilities,
	0
};

/* Terminal supports cursor colours. */
static const char *const tty_feature_ccolour_capabilities[] = {
	"Cs=\\E]12;%p1%s\\a",
	"Cr=\\E]112\\a",
	NULL
};
static const struct tty_feature tty_feature_ccolour = {
	"ccolour",
	tty_feature_ccolour_capabilities,
	0
};

/* Terminal supports strikethrough. */
static const char *const tty_feature_strikethrough_capabilities[] = {
	"smxx=\\E[9m",
	NULL
};
static const struct tty_feature tty_feature_strikethrough = {
	"strikethrough",
	tty_feature_strikethrough_capabilities,
	0
};

/* Terminal supports synchronized updates. */
static const char *const tty_feature_sync_capabilities[] = {
	"Sync=\\E[?2026%?%p1%{1}%-%tl%eh%;",
	NULL
};
static const struct tty_feature tty_feature_sync = {
	"sync",
	tty_feature_sync_capabilities,
	0
};

/* Terminal supports extended keys. */
static const char *const tty_feature_extkeys_capabilities[] = {
	"Eneks=\\E[>4;1m",
	"Dseks=\\E[>4m",
	NULL
};
static const struct tty_feature tty_feature_extkeys = {
	"extkeys",
	tty_feature_extkeys_capabilities,
	0
};

/* Terminal supports DECSLRM margins. */
static const char *const tty_feature_margins_capabilities[] = {
	"Enmg=\\E[?69h",
	"Dsmg=\\E[?69l",
	"Clmg=\\E[s",
	"Cmg=\\E[%i%p1%d;%p2%ds",
	NULL
};
static const struct tty_feature tty_feature_margins = {
	"margins",
	tty_feature_margins_capabilities,
	TERM_DECSLRM
};

/* Terminal supports DECFRA rectangle fill. */
static const char *const tty_feature_rectfill_capabilities[] = {
	"Rect",
	NULL
};
static const struct tty_feature tty_feature_rectfill = {
	"rectfill",
	tty_feature_rectfill_capabilities,
	TERM_DECFRA
};

/* Use builtin function keys only. */
static const char *const tty_feature_ignorefkeys_capabilities[] = {
	"kf0@",
	"kf1@",
	"kf2@",
	"kf3@",
	"kf4@",
	"kf5@",
	"kf6@",
	"kf7@",
	"kf8@",
	"kf9@",
	"kf10@",
	"kf11@",
	"kf12@",
	"kf13@",
	"kf14@",
	"kf15@",
	"kf16@",
	"kf17@",
	"kf18@",
	"kf19@",
	"kf20@",
	"kf21@",
	"kf22@",
	"kf23@",
	"kf24@",
	"kf25@",
	"kf26@",
	"kf27@",
	"kf28@",
	"kf29@",
	"kf30@",
	"kf31@",
	"kf32@",
	"kf33@",
	"kf34@",
	"kf35@",
	"kf36@",
	"kf37@",
	"kf38@",
	"kf39@",
	"kf40@",
	"kf41@",
	"kf42@",
	"kf43@",
	"kf44@",
	"kf45@",
	"kf46@",
	"kf47@",
	"kf48@",
	"kf49@",
	"kf50@",
	"kf51@",
	"kf52@",
	"kf53@",
	"kf54@",
	"kf55@",
	"kf56@",
	"kf57@",
	"kf58@",
	"kf59@",
	"kf60@",
	"kf61@",
	"kf62@",
	"kf63@",
	NULL
};
static const struct tty_feature tty_feature_ignorefkeys = {
	"ignorefkeys",
	tty_feature_ignorefkeys_capabilities,
	0
};

/* Terminal has sixel capability. */
static const char *const tty_feature_sixel_capabilities[] = {
	"Sxl",
	NULL
};
static const struct tty_feature tty_feature_sixel = {
	"sixel",
	tty_feature_sixel_capabilities,
	TERM_SIXEL
};

/* Available terminal features. */
static const struct tty_feature *const tty_features[] = {
	&tty_feature_256,
	&tty_feature_bpaste,
	&tty_feature_ccolour,
	&tty_feature_clipboard,
	&tty_feature_hyperlinks,