mirror of
https://github.com/MidnightCommander/mc
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56bf77ae57
Generally, Ctrl-\ is a default assignment to SIGQUIT signal. S-Lang breaks this assignment. NCurses doesn't, therefore MC just quits when user presses the Ctrl-\ key. This commit emulates the S-Lang way in NCurses-based MC. Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
605 lines
14 KiB
C
605 lines
14 KiB
C
/*
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Interface to the terminal controlling library.
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Slang wrapper.
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Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
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Written by:
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Andrew Borodin <aborodin@vmail.ru>, 2009.
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This file is part of the Midnight Commander.
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The Midnight Commander is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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/** \file
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* \brief Source: S-Lang-based tty layer of Midnight Commander
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <sys/types.h> /* size_t */
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#include <unistd.h>
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#include <signal.h>
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#include "lib/global.h"
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#include "lib/strutil.h" /* str_term_form */
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#include "tty-internal.h" /* slow_tty */
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#include "tty.h"
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#include "color-slang.h"
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#include "color-internal.h"
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#include "mouse.h" /* Gpm_Event is required in key.h */
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#include "key.h" /* define_sequence */
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#include "win.h"
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/*** global variables **************************************************/
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extern int reset_hp_softkeys;
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/*** file scope macro definitions **************************************/
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#ifndef SA_RESTART
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# define SA_RESTART 0
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#endif
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#ifndef SLTT_MAX_SCREEN_COLS
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#define SLTT_MAX_SCREEN_COLS 512
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#endif
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#ifndef SLTT_MAX_SCREEN_ROWS
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#define SLTT_MAX_SCREEN_ROWS 512
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#endif
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/*** file scope type declarations **************************************/
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/*** file scope variables **********************************************/
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/* Various saved termios settings that we control here */
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static struct termios boot_mode;
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static struct termios new_mode;
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/* Controls whether we should wait for input in tty_lowlevel_getch */
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static gboolean no_slang_delay;
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/* This table describes which capabilities we want and which values we
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* assign to them.
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*/
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static const struct {
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int key_code;
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const char *key_name;
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} key_table[] = {
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{
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KEY_F (0), "k0"}, {
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KEY_F (1), "k1"}, {
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KEY_F (2), "k2"}, {
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KEY_F (3), "k3"}, {
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KEY_F (4), "k4"}, {
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KEY_F (5), "k5"}, {
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KEY_F (6), "k6"}, {
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KEY_F (7), "k7"}, {
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KEY_F (8), "k8"}, {
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KEY_F (9), "k9"}, {
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KEY_F (10), "k;"}, {
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KEY_F (11), "F1"}, {
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KEY_F (12), "F2"}, {
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KEY_F (13), "F3"}, {
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KEY_F (14), "F4"}, {
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KEY_F (15), "F5"}, {
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KEY_F (16), "F6"}, {
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KEY_F (17), "F7"}, {
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KEY_F (18), "F8"}, {
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KEY_F (19), "F9"}, {
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KEY_F (20), "FA"}, {
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KEY_IC, "kI"}, {
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KEY_NPAGE, "kN"}, {
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KEY_PPAGE, "kP"}, {
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KEY_LEFT, "kl"}, {
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KEY_RIGHT, "kr"}, {
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KEY_UP, "ku"}, {
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KEY_DOWN, "kd"}, {
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KEY_DC, "kD"}, {
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KEY_BACKSPACE, "kb"}, {
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KEY_HOME, "kh"}, {
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KEY_END, "@7"}, {
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0, NULL}
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};
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/*** file scope functions **********************************************/
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/* HP Terminals have capabilities (pfkey, pfloc, pfx) to program function keys.
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elm 2.4pl15 invoked with the -K option utilizes these softkeys and the
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consequence is that function keys don't work in MC sometimes...
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Unfortunately I don't now the one and only escape sequence to turn off.
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softkeys (elm uses three different capabilities to turn on softkeys and two.
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capabilities to turn them off)..
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Among other things elm uses the pair we already use in slang_keypad. That's.
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the reason why I call slang_reset_softkeys from slang_keypad. In lack of
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something better the softkeys are programmed to their defaults from the
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termcap/terminfo database.
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The escape sequence to program the softkeys is taken from elm and it is.
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hardcoded because neither slang nor ncurses 4.1 know how to 'printf' this.
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sequence. -- Norbert
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*/
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static void
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slang_reset_softkeys (void)
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{
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int key;
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char *send;
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static const char display[] = " ";
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char tmp[BUF_SMALL];
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for (key = 1; key < 9; key++) {
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g_snprintf (tmp, sizeof (tmp), "k%d", key);
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send = (char *) SLtt_tgetstr (tmp);
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if (send != NULL) {
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g_snprintf (tmp, sizeof (tmp), "\033&f%dk%dd%dL%s%s", key,
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(int) (sizeof (display) - 1), (int) strlen (send), display, send);
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SLtt_write_string (tmp);
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}
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}
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}
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static void
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do_define_key (int code, const char *strcap)
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{
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char *seq;
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seq = (char *) SLtt_tgetstr ((char *) strcap);
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if (seq != NULL)
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define_sequence (code, seq, MCKEY_NOACTION);
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}
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static void
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load_terminfo_keys (void)
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{
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int i;
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for (i = 0; key_table[i].key_code; i++)
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do_define_key (key_table[i].key_code, key_table[i].key_name);
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}
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/* --------------------------------------------------------------------------------------------- */
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/*** public functions **************************************************/
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/* --------------------------------------------------------------------------------------------- */
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int
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mc_tty_normalize_lines_char (const char *str)
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{
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char *str2;
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int res;
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struct mc_tty_lines_struct {
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const char *line;
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int line_code;
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} const lines_codes[] = {
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{"\342\224\214", SLSMG_ULCORN_CHAR},
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{"\342\224\220", SLSMG_URCORN_CHAR},
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{"\342\224\224", SLSMG_LLCORN_CHAR},
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{"\342\224\230", SLSMG_LRCORN_CHAR},
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{"\342\224\234", SLSMG_LTEE_CHAR},
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{"\342\224\244", SLSMG_RTEE_CHAR},
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{"\342\224\254", SLSMG_UTEE_CHAR},
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{"\342\224\264", SLSMG_DTEE_CHAR},
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{"\342\224\200", SLSMG_HLINE_CHAR},
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{"\342\224\202", SLSMG_VLINE_CHAR},
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{"\342\224\274", SLSMG_PLUS_CHAR},
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{NULL, 0}
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};
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if (!str)
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return (int) ' ';
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for (res = 0; lines_codes[res].line; res++) {
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if (strcmp (str, lines_codes[res].line) == 0)
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return lines_codes[res].line_code;
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}
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str2 = mc_tty_normalize_from_utf8 (str);
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res = g_utf8_get_char_validated (str2, -1);
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if (res < 0)
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res = (unsigned char) str2[0];
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g_free (str2);
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return res;
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}
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/* --------------------------------------------------------------------------------------------- */
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void
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tty_init (gboolean slow, gboolean ugly_lines)
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{
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slow_tty = slow;
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ugly_line_drawing = ugly_lines;
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SLtt_get_terminfo ();
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SLutf8_enable (-1);
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/*
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* If the terminal in not in terminfo but begins with a well-known
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* string such as "linux" or "xterm" S-Lang will go on, but the
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* terminal size and several other variables won't be initialized
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* (as of S-Lang 1.4.4). Detect it and abort. Also detect extremely
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* small, large and negative screen dimensions.
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*/
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if ((COLS < 10) || (LINES < 5)
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|| (COLS > SLTT_MAX_SCREEN_COLS) || (LINES > SLTT_MAX_SCREEN_ROWS)) {
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fprintf (stderr,
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_("Screen size %dx%d is not supported.\n"
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"Check the TERM environment variable.\n"), COLS, LINES);
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exit (1);
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}
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tcgetattr (fileno (stdin), &boot_mode);
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/* 255 = ignore abort char; XCTRL('g') for abort char = ^g */
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SLang_init_tty (XCTRL ('g'), 1, 0);
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if (ugly_lines)
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SLtt_Has_Alt_Charset = 0;
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/* If SLang uses fileno(stderr) for terminal input MC will hang
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if we call SLang_getkey between calls to open_error_pipe and
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close_error_pipe, e.g. when we do a growing view of an gzipped
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file. */
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if (SLang_TT_Read_FD == fileno (stderr))
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SLang_TT_Read_FD = fileno (stdin);
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if (tcgetattr (SLang_TT_Read_FD, &new_mode) == 0) {
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#ifdef VDSUSP
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new_mode.c_cc[VDSUSP] = NULL_VALUE; /* to ignore ^Y */
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#endif
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#ifdef VLNEXT
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new_mode.c_cc[VLNEXT] = NULL_VALUE; /* to ignore ^V */
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#endif
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tcsetattr (SLang_TT_Read_FD, TCSADRAIN, &new_mode);
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}
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tty_reset_prog_mode ();
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load_terminfo_keys ();
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SLtt_Blink_Mode = 0;
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tty_start_interrupt_key ();
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/* It's the small part from the previous init_key() */
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init_key_input_fd ();
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SLsmg_init_smg ();
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do_enter_ca_mode ();
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tty_keypad (TRUE);
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tty_nodelay (FALSE);
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}
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void
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tty_shutdown (void)
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{
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char *op_cap;
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SLsmg_reset_smg ();
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tty_reset_shell_mode ();
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do_exit_ca_mode ();
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SLang_reset_tty ();
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/* Load the op capability to reset the colors to those that were
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* active when the program was started up
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*/
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op_cap = SLtt_tgetstr ((char *) "op");
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if (op_cap != NULL) {
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fputs (op_cap, stdout);
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fflush (stdout);
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}
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}
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/* Done each time we come back from done mode */
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void
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tty_reset_prog_mode (void)
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{
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tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
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SLsmg_init_smg ();
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SLsmg_touch_lines (0, LINES);
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}
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/* Called each time we want to shutdown slang screen manager */
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void
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tty_reset_shell_mode (void)
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{
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tcsetattr (SLang_TT_Read_FD, TCSANOW, &boot_mode);
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}
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void
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tty_raw_mode (void)
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{
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tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
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}
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void
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tty_noraw_mode (void)
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{
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}
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void
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tty_noecho (void)
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{
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}
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int
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tty_flush_input (void)
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{
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return 0; /* OK */
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}
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void
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tty_keypad (gboolean set)
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{
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char *keypad_string;
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keypad_string = (char *) SLtt_tgetstr ((char *) (set ? "ks" : "ke"));
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if (keypad_string != NULL)
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SLtt_write_string (keypad_string);
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if (set && reset_hp_softkeys)
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slang_reset_softkeys ();
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}
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void
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tty_nodelay (gboolean set)
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{
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no_slang_delay = set;
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}
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int
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tty_baudrate (void)
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{
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return SLang_TT_Baud_Rate;
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}
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int
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tty_lowlevel_getch (void)
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{
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int c;
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if (no_slang_delay && (SLang_input_pending (0) == 0))
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return -1;
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c = SLang_getkey ();
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if (c == SLANG_GETKEY_ERROR) {
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fprintf (stderr,
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"SLang_getkey returned SLANG_GETKEY_ERROR\n"
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"Assuming EOF on stdin and exiting\n");
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exit (1);
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}
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return c;
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}
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int
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tty_reset_screen (void)
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{
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SLsmg_reset_smg ();
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return 0; /* OK */
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}
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void
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tty_touch_screen (void)
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{
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SLsmg_touch_lines (0, LINES);
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}
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void
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tty_gotoyx (int y, int x)
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{
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SLsmg_gotorc (y, x);
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}
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void
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tty_getyx (int *py, int *px)
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{
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*py = SLsmg_get_row ();
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*px = SLsmg_get_column ();
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}
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/* if x < 0 or y < 0, draw line staring from current position */
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void
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tty_draw_hline (int y, int x, int ch, int len)
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{
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if (ch == ACS_HLINE)
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ch = mc_tty_ugly_frm[MC_TTY_FRM_thinhoriz];
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if ((y < 0) || (x < 0)) {
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y = SLsmg_get_row ();
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x = SLsmg_get_column ();
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} else
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SLsmg_gotorc (y, x);
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if (ch == 0)
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ch = ACS_HLINE;
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if (ch == ACS_HLINE)
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SLsmg_draw_hline (len);
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else
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while (len-- != 0)
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tty_print_char (ch);
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SLsmg_gotorc (y, x);
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}
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/* if x < 0 or y < 0, draw line staring from current position */
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void
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tty_draw_vline (int y, int x, int ch, int len)
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{
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if (ch == ACS_VLINE)
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ch = mc_tty_ugly_frm[MC_TTY_FRM_thinvert];
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if ((y < 0) || (x < 0)) {
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y = SLsmg_get_row ();
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x = SLsmg_get_column ();
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} else
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SLsmg_gotorc (y, x);
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if (ch == 0)
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ch = ACS_VLINE;
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if (ch == ACS_VLINE)
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SLsmg_draw_vline (len);
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else {
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int pos = 0;
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while (len-- != 0) {
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SLsmg_gotorc (y + pos, x);
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tty_print_char (ch);
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pos++;
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}
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}
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SLsmg_gotorc (y, x);
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}
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void
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tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
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{
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SLsmg_fill_region (y, x, rows, cols, ch);
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}
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void
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tty_set_alt_charset (gboolean alt_charset)
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{
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SLsmg_set_char_set ((int) alt_charset);
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}
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void
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tty_display_8bit (gboolean what)
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{
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SLsmg_Display_Eight_Bit = what ? 128 : 160;
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}
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void
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tty_print_char (int c)
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{
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SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
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}
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void
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tty_print_alt_char (int c)
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{
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#define DRAW(x, y) (x == y) \
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? SLsmg_draw_object (SLsmg_get_row(), SLsmg_get_column(), x) \
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: SLsmg_write_char ((unsigned int) y)
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switch (c) {
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case ACS_VLINE:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_thinvert]);
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break;
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case ACS_HLINE:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_thinhoriz]);
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break;
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case ACS_LTEE:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_leftmiddle]);
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break;
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case ACS_RTEE:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_rightmiddle]);
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break;
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case ACS_ULCORNER:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_lefttop]);
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break;
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case ACS_LLCORNER:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_leftbottom]);
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break;
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case ACS_URCORNER:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_righttop]);
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break;
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case ACS_LRCORNER:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_rightbottom]);
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break;
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case ACS_PLUS:
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DRAW (c, mc_tty_ugly_frm[MC_TTY_FRM_centermiddle]);
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break;
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default:
|
|
SLsmg_write_char ((unsigned int) c);
|
|
}
|
|
#undef DRAW
|
|
}
|
|
|
|
void
|
|
tty_print_anychar (int c)
|
|
{
|
|
char str[6 + 1];
|
|
|
|
if (c > 255) {
|
|
int 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 {
|
|
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 ((char *) cap);
|
|
}
|
|
|
|
void
|
|
tty_refresh (void)
|
|
{
|
|
SLsmg_refresh ();
|
|
}
|
|
|
|
void
|
|
tty_setup_sigwinch (void (*handler) (int))
|
|
{
|
|
#ifdef SIGWINCH
|
|
struct sigaction act, oact;
|
|
act.sa_handler = handler;
|
|
sigemptyset (&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
#ifdef SA_RESTART
|
|
act.sa_flags |= SA_RESTART;
|
|
#endif /* SA_RESTART */
|
|
sigaction (SIGWINCH, &act, &oact);
|
|
#endif /* SIGWINCH */
|
|
}
|
|
|
|
void
|
|
tty_beep (void)
|
|
{
|
|
SLtt_beep ();
|
|
}
|