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Diffstat (limited to '')
| -rw-r--r-- | lib/tty/tty-slang.c | 779 |
1 files changed, 779 insertions, 0 deletions
diff --git a/lib/tty/tty-slang.c b/lib/tty/tty-slang.c new file mode 100644 index 0000000..cf2e779 --- /dev/null +++ b/lib/tty/tty-slang.c @@ -0,0 +1,779 @@ +/* + Interface to the terminal controlling library. + Slang wrapper. + + Copyright (C) 2005-2022 + Free Software Foundation, Inc. + + Written by: + Andrew Borodin <aborodin@vmail.ru>, 2009 + Egmont Koblinger <egmont@gmail.com>, 2010 + + 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 <http://www.gnu.org/licenses/>. + */ + +/** \file + * \brief Source: S-Lang-based tty layer of Midnight Commander + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> /* size_t */ +#include <unistd.h> +#ifdef HAVE_SYS_IOCTL_H +#include <sys/ioctl.h> +#endif +#include <termios.h> + +#include "lib/global.h" +#include "lib/strutil.h" /* str_term_form */ +#include "lib/util.h" /* is_printable() */ + +#include "tty-internal.h" /* mc_tty_normalize_from_utf8() */ +#include "tty.h" +#include "color.h" +#include "color-slang.h" +#include "color-internal.h" +#include "mouse.h" /* Gpm_Event is required in key.h */ +#include "key.h" /* define_sequence */ +#include "win.h" + + +/*** global variables ****************************************************************************/ + +/* If true program softkeys (HP terminals only) on startup and after every + command ran in the subshell to the description found in the termcap/terminfo + database */ +int reset_hp_softkeys = 0; + +/*** file scope macro definitions ****************************************************************/ + +#ifndef SLTT_MAX_SCREEN_COLS +#define SLTT_MAX_SCREEN_COLS 512 +#endif + +#ifndef SLTT_MAX_SCREEN_ROWS +#define SLTT_MAX_SCREEN_ROWS 512 +#endif + +/*** file scope type declarations ****************************************************************/ + +/*** file scope variables ************************************************************************/ + +/* Various saved termios settings that we control here */ +static struct termios boot_mode; +static struct termios new_mode; + +/* Controls whether we should wait for input in tty_lowlevel_getch */ +static gboolean no_slang_delay; + +static gboolean slsmg_active = FALSE; + +/* This table describes which capabilities we want and which values we + * assign to them. + */ +static const struct +{ + int key_code; + const char *key_name; +} key_table[] = +{ + /* *INDENT-OFF* */ + { KEY_F (0), "k0" }, + { KEY_F (1), "k1" }, + { KEY_F (2), "k2" }, + { KEY_F (3), "k3" }, + { KEY_F (4), "k4" }, + { KEY_F (5), "k5" }, + { KEY_F (6), "k6" }, + { KEY_F (7), "k7" }, + { KEY_F (8), "k8" }, + { KEY_F (9), "k9" }, + { KEY_F (10), "k;" }, + { KEY_F (11), "F1" }, + { KEY_F (12), "F2" }, + { KEY_F (13), "F3" }, + { KEY_F (14), "F4" }, + { KEY_F (15), "F5" }, + { KEY_F (16), "F6" }, + { KEY_F (17), "F7" }, + { KEY_F (18), "F8" }, + { KEY_F (19), "F9" }, + { KEY_F (20), "FA" }, + { KEY_IC, "kI" }, + { KEY_NPAGE, "kN" }, + { KEY_PPAGE, "kP" }, + { KEY_LEFT, "kl" }, + { KEY_RIGHT, "kr" }, + { KEY_UP, "ku" }, + { KEY_DOWN, "kd" }, + { KEY_DC, "kD" }, + { KEY_BACKSPACE, "kb" }, + { KEY_HOME, "kh" }, + { KEY_END, "@7" }, + { 0, NULL } + /* *INDENT-ON* */ +}; + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +tty_setup_sigwinch (void (*handler) (int)) +{ + (void) SLsignal (SIGWINCH, handler); + tty_create_winch_pipe (); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +sigwinch_handler (int dummy) +{ + ssize_t n = 0; + + (void) dummy; + + n = write (sigwinch_pipe[1], "", 1); + (void) n; + + (void) SLsignal (SIGWINCH, sigwinch_handler); +} + +/* --------------------------------------------------------------------------------------------- */ + +/* HP Terminals have capabilities (pfkey, pfloc, pfx) to program function keys. + elm 2.4pl15 invoked with the -K option utilizes these softkeys and the + consequence is that function keys don't work in MC sometimes... + Unfortunately I don't now the one and only escape sequence to turn off. + softkeys (elm uses three different capabilities to turn on softkeys and two. + capabilities to turn them off).. + Among other things elm uses the pair we already use in slang_keypad. That's. + the reason why I call slang_reset_softkeys from slang_keypad. In lack of + something better the softkeys are programmed to their defaults from the + termcap/terminfo database. + The escape sequence to program the softkeys is taken from elm and it is. + hardcoded because neither slang nor ncurses 4.1 know how to 'printf' this. + sequence. -- Norbert + */ + +static void +slang_reset_softkeys (void) +{ + int key; + static const char display[] = " "; + char tmp[BUF_SMALL]; + + for (key = 1; key < 9; key++) + { + char *send; + + g_snprintf (tmp, sizeof (tmp), "k%d", key); + send = SLtt_tgetstr (tmp); + if (send != NULL) + { + g_snprintf (tmp, sizeof (tmp), ESC_STR "&f%dk%dd%dL%s%s", key, + (int) (sizeof (display) - 1), (int) strlen (send), display, send); + SLtt_write_string (tmp); + } + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +do_define_key (int code, const char *strcap) +{ + char *seq; + + seq = SLtt_tgetstr ((SLFUTURE_CONST char *) strcap); + if (seq != NULL) + define_sequence (code, seq, MCKEY_NOACTION); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +load_terminfo_keys (void) +{ + int i; + + for (i = 0; key_table[i].key_code; i++) + do_define_key (key_table[i].key_code, key_table[i].key_name); +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +int +mc_tty_normalize_lines_char (const char *str) +{ + char *str2; + int res; + + struct mc_tty_lines_struct + { + const char *line; + int line_code; + } const lines_codes[] = { + {"\342\224\214", SLSMG_ULCORN_CHAR}, + {"\342\224\220", SLSMG_URCORN_CHAR}, + {"\342\224\224", SLSMG_LLCORN_CHAR}, + {"\342\224\230", SLSMG_LRCORN_CHAR}, + {"\342\224\234", SLSMG_LTEE_CHAR}, + {"\342\224\244", SLSMG_RTEE_CHAR}, + {"\342\224\254", SLSMG_UTEE_CHAR}, + {"\342\224\264", SLSMG_DTEE_CHAR}, + {"\342\224\200", SLSMG_HLINE_CHAR}, + {"\342\224\202", SLSMG_VLINE_CHAR}, + {"\342\224\274", SLSMG_PLUS_CHAR}, + + {NULL, 0} + }; + + if (!str) + return (int) ' '; + + for (res = 0; lines_codes[res].line; res++) + { + if (strcmp (str, lines_codes[res].line) == 0) + return lines_codes[res].line_code; + } + + str2 = mc_tty_normalize_from_utf8 (str); + res = g_utf8_get_char_validated (str2, -1); + + if (res < 0) + res = (unsigned char) str2[0]; + g_free (str2); + + return res; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_init (gboolean mouse_enable, gboolean is_xterm) +{ + SLtt_Ignore_Beep = 1; + + SLutf8_enable (-1); /* has to be called first before any of the other functions. */ + SLtt_get_terminfo (); + /* + * If the terminal in not in terminfo but begins with a well-known + * string such as "linux" or "xterm" S-Lang will go on, but the + * terminal size and several other variables won't be initialized + * (as of S-Lang 1.4.4). Detect it and abort. Also detect extremely + * small screen dimensions. + */ + if ((COLS < 10) || (LINES < 5) +#if SLANG_VERSION < 20303 + /* Beginning from pre2.3.3-8 (55f58798c267d76a1b93d0d916027b71a10ac1ee), + these limitations were eliminated. */ + || (COLS > SLTT_MAX_SCREEN_COLS) || (LINES > SLTT_MAX_SCREEN_ROWS) +#endif + ) + { + fprintf (stderr, + _("Screen size %dx%d is not supported.\n" + "Check the TERM environment variable.\n"), COLS, LINES); + exit (EXIT_FAILURE); + } + + tcgetattr (fileno (stdin), &boot_mode); + /* 255 = ignore abort char; XCTRL('g') for abort char = ^g */ + SLang_init_tty (XCTRL ('g'), 1, 0); + + if (mc_global.tty.ugly_line_drawing) + SLtt_Has_Alt_Charset = 0; + + tcgetattr (SLang_TT_Read_FD, &new_mode); + + tty_reset_prog_mode (); + load_terminfo_keys (); + + SLtt_Blink_Mode = (tty_use_256colors (NULL) || tty_use_truecolors (NULL)) ? 1 : 0; + + tty_start_interrupt_key (); + + /* It's the small part from the previous init_key() */ + init_key_input_fd (); + + /* For 8-bit locales, NCurses handles 154 (0x9A) symbol properly, while S-Lang + * requires SLsmg_Display_Eight_Bit >= 154 (OR manual filtering if xterm display + * detected - but checking TERM would fail under screen, OR running xterm + * with allowC1Printable). + */ + tty_display_8bit (FALSE); + + SLsmg_init_smg (); + slsmg_active = TRUE; + if (!mouse_enable) + use_mouse_p = MOUSE_DISABLED; + tty_init_xterm_support (is_xterm); /* do it before tty_enter_ca_mode() call */ + tty_enter_ca_mode (); + tty_keypad (TRUE); + tty_nodelay (FALSE); + + tty_setup_sigwinch (sigwinch_handler); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_shutdown (void) +{ + char *op_cap; + + tty_destroy_winch_pipe (); + tty_reset_shell_mode (); + tty_noraw_mode (); + tty_keypad (FALSE); + tty_reset_screen (); + tty_exit_ca_mode (); + SLang_reset_tty (); + slsmg_active = FALSE; + + /* Load the op capability to reset the colors to those that were + * active when the program was started up + */ + op_cap = SLtt_tgetstr ((SLFUTURE_CONST char *) "op"); + if (op_cap != NULL) + { + fputs (op_cap, stdout); + fflush (stdout); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_enter_ca_mode (void) +{ + /* S-Lang handles alternate screen switching and cursor position saving */ +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_exit_ca_mode (void) +{ + /* S-Lang handles alternate screen switching and cursor position restoring */ +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_change_screen_size (void) +{ + SLtt_get_screen_size (); + if (slsmg_active) + SLsmg_reinit_smg (); + +#ifdef ENABLE_SUBSHELL + if (mc_global.tty.use_subshell) + tty_resize (mc_global.tty.subshell_pty); +#endif +} + +/* --------------------------------------------------------------------------------------------- */ +/* Done each time we come back from done mode */ + +void +tty_reset_prog_mode (void) +{ + tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode); + SLsmg_init_smg (); + slsmg_active = TRUE; + SLsmg_touch_lines (0, LINES); +} + +/* --------------------------------------------------------------------------------------------- */ +/* Called each time we want to shutdown slang screen manager */ + +void +tty_reset_shell_mode (void) +{ + tcsetattr (SLang_TT_Read_FD, TCSANOW, &boot_mode); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_raw_mode (void) +{ + tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_noraw_mode (void) +{ +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_noecho (void) +{ +} + +/* --------------------------------------------------------------------------------------------- */ + +int +tty_flush_input (void) +{ + return 0; /* OK */ +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_keypad (gboolean set) +{ + char *keypad_string; + + keypad_string = SLtt_tgetstr ((SLFUTURE_CONST char *) (set ? "ks" : "ke")); + if (keypad_string != NULL) + SLtt_write_string (keypad_string); + if (set && reset_hp_softkeys) + slang_reset_softkeys (); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_nodelay (gboolean set) +{ + no_slang_delay = set; +} + +/* --------------------------------------------------------------------------------------------- */ + +int +tty_baudrate (void) +{ + return SLang_TT_Baud_Rate; +} + +/* --------------------------------------------------------------------------------------------- */ + +int +tty_lowlevel_getch (void) +{ + int c; + + if (no_slang_delay && (SLang_input_pending (0) == 0)) + return -1; + + c = SLang_getkey (); + if (c == SLANG_GETKEY_ERROR) + { + fprintf (stderr, + "SLang_getkey returned SLANG_GETKEY_ERROR\n" + "Assuming EOF on stdin and exiting\n"); + exit (EXIT_FAILURE); + } + + return c; +} + +/* --------------------------------------------------------------------------------------------- */ + +int +tty_reset_screen (void) +{ + SLsmg_reset_smg (); + slsmg_active = FALSE; + return 0; /* OK */ +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_touch_screen (void) +{ + SLsmg_touch_lines (0, LINES); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_gotoyx (int y, int x) +{ + SLsmg_gotorc (y, x); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_getyx (int *py, int *px) +{ + *py = SLsmg_get_row (); + *px = SLsmg_get_column (); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_draw_hline (int y, int x, int ch, int len) +{ + int x1; + + if (y < 0 || y >= LINES || x >= COLS) + return; + + x1 = x; + + if (x < 0) + { + len += x; + if (len <= 0) + return; + x = 0; + } + + if (ch == ACS_HLINE) + ch = mc_tty_frm[MC_TTY_FRM_HORIZ]; + if (ch == 0) + ch = ACS_HLINE; + + SLsmg_gotorc (y, x); + + if (ch == ACS_HLINE) + SLsmg_draw_hline (len); + else + while (len-- != 0) + tty_print_char (ch); + + SLsmg_gotorc (y, x1); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_draw_vline (int y, int x, int ch, int len) +{ + int y1; + + if (x < 0 || x >= COLS || y >= LINES) + return; + + y1 = y; + + if (y < 0) + { + len += y; + if (len <= 0) + return; + y = 0; + } + + if (ch == ACS_VLINE) + ch = mc_tty_frm[MC_TTY_FRM_VERT]; + if (ch == 0) + ch = ACS_VLINE; + + SLsmg_gotorc (y, x); + + if (ch == ACS_VLINE) + SLsmg_draw_vline (len); + else + { + int pos = 0; + + while (len-- != 0) + { + SLsmg_gotorc (y + pos, x); + tty_print_char (ch); + pos++; + } + } + + SLsmg_gotorc (y1, x); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_fill_region (int y, int x, int rows, int cols, unsigned char ch) +{ + SLsmg_fill_region (y, x, rows, cols, ch); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_colorize_area (int y, int x, int rows, int cols, int color) +{ + if (use_colors) + SLsmg_set_color_in_region (color, y, x, rows, cols); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_set_alt_charset (gboolean alt_charset) +{ + SLsmg_set_char_set ((int) alt_charset); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_display_8bit (gboolean what) +{ + SLsmg_Display_Eight_Bit = what ? 128 : 160; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_char (int c) +{ + SLsmg_write_char ((SLwchar_Type) ((unsigned int) c)); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_alt_char (int c, gboolean single) +{ +#define DRAW(x, y) (x == y) \ + ? SLsmg_draw_object (SLsmg_get_row(), SLsmg_get_column(), x) \ + : SLsmg_write_char ((unsigned int) y) + switch (c) + { + case ACS_VLINE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT]); + break; + case ACS_HLINE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ]); + break; + case ACS_LTEE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTMIDDLE : MC_TTY_FRM_DLEFTMIDDLE]); + break; + case ACS_RTEE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTMIDDLE : MC_TTY_FRM_DRIGHTMIDDLE]); + break; + case ACS_TTEE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_TOPMIDDLE : MC_TTY_FRM_DTOPMIDDLE]); + break; + case ACS_BTEE: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_BOTTOMMIDDLE : MC_TTY_FRM_DBOTTOMMIDDLE]); + break; + case ACS_ULCORNER: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTTOP : MC_TTY_FRM_DLEFTTOP]); + break; + case ACS_LLCORNER: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTBOTTOM : MC_TTY_FRM_DLEFTBOTTOM]); + break; + case ACS_URCORNER: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTTOP : MC_TTY_FRM_DRIGHTTOP]); + break; + case ACS_LRCORNER: + DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTBOTTOM : MC_TTY_FRM_DRIGHTBOTTOM]); + break; + case ACS_PLUS: + DRAW (c, mc_tty_frm[MC_TTY_FRM_CROSS]); + break; + default: + SLsmg_write_char ((unsigned int) c); + } +#undef DRAW +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_anychar (int c) +{ + if (c > 255) + { + char str[UTF8_CHAR_LEN + 1]; + int res; + + res = g_unichar_to_utf8 (c, str); + if (res == 0) + { + str[0] = '.'; + str[1] = '\0'; + } + else + { + str[res] = '\0'; + } + SLsmg_write_string ((char *) str_term_form (str)); + } + else + { + if (!is_printable (c)) + c = '.'; + SLsmg_write_char ((SLwchar_Type) ((unsigned int) c)); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_print_string (const char *s) +{ + SLsmg_write_string ((char *) str_term_form (s)); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_printf (const char *fmt, ...) +{ + va_list args; + + va_start (args, fmt); + SLsmg_vprintf ((char *) fmt, args); + va_end (args); +} + +/* --------------------------------------------------------------------------------------------- */ + +char * +tty_tgetstr (const char *cap) +{ + return SLtt_tgetstr ((SLFUTURE_CONST char *) cap); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_refresh (void) +{ + SLsmg_refresh (); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +tty_beep (void) +{ + SLtt_beep (); +} + +/* --------------------------------------------------------------------------------------------- */ |