From ffccd5b2b05243e7976db80f90f453dccfae9886 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 22:22:03 +0200 Subject: Adding upstream version 3:4.8.30. Signed-off-by: Daniel Baumann --- lib/tty/tty.c | 416 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 416 insertions(+) create mode 100644 lib/tty/tty.c (limited to 'lib/tty/tty.c') diff --git a/lib/tty/tty.c b/lib/tty/tty.c new file mode 100644 index 0000000..cae0a05 --- /dev/null +++ b/lib/tty/tty.c @@ -0,0 +1,416 @@ +/* + Interface to the terminal controlling library. + + Copyright (C) 2005-2023 + Free Software Foundation, Inc. + + Written by: + Roland Illig , 2005. + Andrew Borodin , 2009. + + This file is part of the Midnight Commander. + + The Midnight Commander is free software: you can redistribute it + and/or modify it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the License, + or (at your option) any later version. + + The Midnight Commander is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +/** \file tty.c + * \brief Source: %interface to the terminal controlling library + */ + +#include + +#include +#include +#include +#include +#include /* memset() */ + +#ifdef HAVE_SYS_SELECT_H +#include +#else +#include +#include +#endif +#include /* exit() */ + +#ifdef HAVE_SYS_IOCTL_H +#include +#endif + +/* In some systems (like Solaris 11.4 SPARC), TIOCSWINSZ is defined in termios.h */ +#include + +#include "lib/global.h" +#include "lib/strutil.h" + +#include "tty.h" +#include "tty-internal.h" +#include "color.h" /* tty_set_normal_attrs() */ +#include "mouse.h" /* use_mouse_p */ +#include "win.h" + +/*** global variables ****************************************************************************/ + +int mc_tty_frm[MC_TTY_FRM_MAX]; + +/*** file scope macro definitions ****************************************************************/ + +/*** file scope type declarations ****************************************************************/ + +/*** forward declarations (file scope functions) *************************************************/ + +/*** file scope variables ************************************************************************/ + +static SIG_ATOMIC_VOLATILE_T got_interrupt = 0; + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +sigintr_handler (int signo) +{ + (void) &signo; + got_interrupt = 1; +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +/** + * Check terminal type. If $TERM is not set or value is empty, mc finishes with EXIT_FAILURE. + * + * @param force_xterm Set forced the XTerm type + * + * @return true if @param force_xterm is true or value of $TERM is one of following: + * term* + * konsole* + * rxvt* + * Eterm + * dtterm + * alacritty* + * foot* + * screen* + * tmux* + * contour* + */ +gboolean +tty_check_term (gboolean force_xterm) +{ + const char *termvalue; + + termvalue = getenv ("TERM"); + if (termvalue == NULL || *termvalue == '\0') + { + fputs (_("The TERM environment variable is unset!\n"), stderr); + exit (EXIT_FAILURE); + } + + /* *INDENT-OFF* */ + return force_xterm + || strncmp (termvalue, "xterm", 5) == 0 + || strncmp (termvalue, "konsole", 7) == 0 + || strncmp (termvalue, "rxvt", 4) == 0 + || strcmp (termvalue, "Eterm") == 0 + || strcmp (termvalue, "dtterm") == 0 + || strncmp (termvalue, "alacritty", 9) == 0 + || strncmp (termvalue, "foot", 4) == 0 + || strncmp (termvalue, "screen", 6) == 0 + || strncmp (termvalue, "tmux", 4) == 0 + || strncmp (termvalue, "contour", 7) == 0; + /* *INDENT-ON* */ +} + +/* --------------------------------------------------------------------------------------------- */ + +extern void +tty_start_interrupt_key (void) +{ + struct sigaction act; + + memset (&act, 0, sizeof (act)); + act.sa_handler = sigintr_handler; + sigemptyset (&act.sa_mask); +#ifdef SA_RESTART + act.sa_flags = SA_RESTART; +#endif /* SA_RESTART */ + sigaction (SIGINT, &act, NULL); +} + +/* --------------------------------------------------------------------------------------------- */ + +extern void +tty_enable_interrupt_key (void) +{ + struct sigaction act; + + memset (&act, 0, sizeof (act)); + act.sa_handler = sigintr_handler; + sigemptyset (&act.sa_mask); + sigaction (SIGINT, &act, NULL); + got_interrupt = 0; +} + +/* --------------------------------------------------------------------------------------------- */ + +extern void +tty_disable_interrupt_key (void) +{ + struct sigaction act; + + memset (&act, 0, sizeof (act)); + act.sa_handler = SIG_IGN; + sigemptyset (&act.sa_mask); + sigaction (SIGINT, &act, NULL); +} + +/* --------------------------------------------------------------------------------------------- */ + +extern gboolean +tty_got_interrupt (void) +{ + gboolean rv; + + rv = (got_interrupt != 0); + got_interrupt = 0; + return rv; +} + +/* --------------------------------------------------------------------------------------------- */ + +gboolean +tty_got_winch (void) +{ + fd_set fdset; + /* *INDENT-OFF* */ + /* instant timeout */ + struct timeval timeout = { .tv_sec = 0, .tv_usec = 0 }; + /* *INDENT-ON* */ + int ok; + + FD_ZERO (&fdset); + FD_SET (sigwinch_pipe[0], &fdset); + + while ((ok = select (sigwinch_pipe[0] + 1, &fdset, NULL, NULL, &timeout)) < 0) + if (errno != EINTR) + { + perror (_("Cannot check SIGWINCH pipe")); + exit (EXIT_FAILURE); + } + + return (ok != 0 && FD_ISSET (sigwinch_pipe[0], &fdset)); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_flush_winch (void) +{ + ssize_t n; + + /* merge all SIGWINCH events raised to this moment */ + do + { + char x[16]; + + /* read multiple events at a time */ + n = read (sigwinch_pipe[0], &x, sizeof (x)); + } + while (n > 0 || (n == -1 && errno == EINTR)); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_one_hline (gboolean single) +{ + tty_print_alt_char (ACS_HLINE, single); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_one_vline (gboolean single) +{ + tty_print_alt_char (ACS_VLINE, single); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_draw_box (int y, int x, int ys, int xs, gboolean single) +{ + int y2, x2; + + if (ys <= 0 || xs <= 0) + return; + + ys--; + xs--; + + y2 = y + ys; + x2 = x + xs; + + tty_draw_vline (y, x, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys); + tty_draw_vline (y, x2, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys); + tty_draw_hline (y, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs); + tty_draw_hline (y2, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs); + tty_gotoyx (y, x); + tty_print_alt_char (ACS_ULCORNER, single); + tty_gotoyx (y2, x); + tty_print_alt_char (ACS_LLCORNER, single); + tty_gotoyx (y, x2); + tty_print_alt_char (ACS_URCORNER, single); + tty_gotoyx (y2, x2); + tty_print_alt_char (ACS_LRCORNER, single); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_draw_box_shadow (int y, int x, int rows, int cols, int shadow_color) +{ + /* draw right shadow */ + tty_colorize_area (y + 1, x + cols, rows - 1, 2, shadow_color); + /* draw bottom shadow */ + tty_colorize_area (y + rows, x + 2, 1, cols, shadow_color); +} + +/* --------------------------------------------------------------------------------------------- */ + +char * +mc_tty_normalize_from_utf8 (const char *str) +{ + GIConv conv; + GString *buffer; + const char *_system_codepage = str_detect_termencoding (); + + if (str_isutf8 (_system_codepage)) + return g_strdup (str); + + conv = g_iconv_open (_system_codepage, "UTF-8"); + if (conv == INVALID_CONV) + return g_strdup (str); + + buffer = g_string_new (""); + + if (str_convert (conv, str, buffer) == ESTR_FAILURE) + { + g_string_free (buffer, TRUE); + str_close_conv (conv); + return g_strdup (str); + } + str_close_conv (conv); + + return g_string_free (buffer, FALSE); +} + +/* --------------------------------------------------------------------------------------------- */ + +/** Resize given terminal using TIOCSWINSZ, return ioctl() result */ +int +tty_resize (int fd) +{ +#if defined TIOCSWINSZ + struct winsize tty_size; + + tty_size.ws_row = LINES; + tty_size.ws_col = COLS; + tty_size.ws_xpixel = tty_size.ws_ypixel = 0; + + return ioctl (fd, TIOCSWINSZ, &tty_size); +#else + return 0; +#endif +} + +/* --------------------------------------------------------------------------------------------- */ + +/** Clear screen */ +void +tty_clear_screen (void) +{ + tty_set_normal_attrs (); + tty_fill_region (0, 0, LINES, COLS, ' '); + tty_refresh (); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_init_xterm_support (gboolean is_xterm) +{ + const char *termvalue; + + termvalue = getenv ("TERM"); + + /* Check mouse and ca capabilities */ + /* terminfo/termcap structures have been already initialized, + in slang_init() or/and init_curses() */ + /* Check terminfo at first, then check termcap */ + xmouse_seq = tty_tgetstr ("kmous"); + if (xmouse_seq == NULL) + xmouse_seq = tty_tgetstr ("Km"); + smcup = tty_tgetstr ("smcup"); + if (smcup == NULL) + smcup = tty_tgetstr ("ti"); + rmcup = tty_tgetstr ("rmcup"); + if (rmcup == NULL) + rmcup = tty_tgetstr ("te"); + + if (strcmp (termvalue, "cygwin") == 0) + { + is_xterm = TRUE; + use_mouse_p = MOUSE_DISABLED; + } + + if (is_xterm) + { + /* Default to the standard xterm sequence */ + if (xmouse_seq == NULL) + xmouse_seq = ESC_STR "[M"; + + /* Enable mouse unless explicitly disabled by --nomouse */ + if (use_mouse_p != MOUSE_DISABLED) + { + if (mc_global.tty.old_mouse) + use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING; + else + { + /* FIXME: this dirty hack to set supported type of tracking the mouse */ + const char *color_term = getenv ("COLORTERM"); + if (strncmp (termvalue, "rxvt", 4) == 0 || + (color_term != NULL && strncmp (color_term, "rxvt", 4) == 0) || + strcmp (termvalue, "Eterm") == 0) + use_mouse_p = MOUSE_XTERM_NORMAL_TRACKING; + else + use_mouse_p = MOUSE_XTERM_BUTTON_EVENT_TRACKING; + } + } + } + + /* There's only one termcap entry "kmous", typically containing "\E[M" or "\E[<". + * We need the former in xmouse_seq, the latter in xmouse_extended_seq. + * See tickets 2956, 3954, and 4063 for details. */ + if (xmouse_seq != NULL) + { + if (strcmp (xmouse_seq, ESC_STR "[<") == 0) + xmouse_seq = ESC_STR "[M"; + + xmouse_extended_seq = ESC_STR "[<"; + } +} + +/* --------------------------------------------------------------------------------------------- */ -- cgit v1.2.3