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mpv/osdep/getch2.c

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/*
* GyS-TermIO v2.0 (for GySmail v3)
* a very small replacement of ncurses library
*
* copyright (C) 1999 A'rpi/ESP-team
*
* This file is part of MPlayer.
*
* MPlayer 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 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
//#define HAVE_TERMCAP
#if !defined(__MORPHOS__)
#define CONFIG_IOCTL
#endif
#define MAX_KEYS 64
#define BUF_LEN 256
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/types.h>
#ifdef CONFIG_IOCTL
#include <sys/ioctl.h>
#endif
#ifdef HAVE_TERMIOS
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_SYS_TERMIOS_H
#include <sys/termios.h>
#endif
#endif
#include <unistd.h>
#include <fcntl.h>
#include "core/bstr.h"
#include "core/input/input.h"
#include "core/input/keycodes.h"
#include "getch2.h"
#ifdef HAVE_TERMIOS
static volatile struct termios tio_orig;
static volatile int tio_orig_set;
#endif
static int getch2_len=0;
static unsigned char getch2_buf[BUF_LEN];
int screen_width=80;
int screen_height=24;
char * erase_to_end_of_line = NULL;
typedef struct {
int len;
int code;
char chars[8];
} keycode_st;
static keycode_st getch2_keys[MAX_KEYS];
static int getch2_key_db=0;
#ifdef HAVE_TERMCAP
#if 0
#include <termcap.h>
#else
int tgetent(char *BUFFER, char *TERMTYPE);
int tgetnum(char *NAME);
int tgetflag(char *NAME);
char *tgetstr(char *NAME, char **AREA);
#endif
static char term_buffer[4096];
static char term_buffer2[4096];
static char *term_p=term_buffer2;
static void termcap_add(char *id,int code){
char *p=tgetstr(id,&term_p);
if(!p) return;
if(getch2_key_db>=MAX_KEYS) return;
getch2_keys[getch2_key_db].len=strlen(p);
strncpy(getch2_keys[getch2_key_db].chars,p,8);
getch2_keys[getch2_key_db].code=code;
++getch2_key_db;
/* printf("%s=%s\n",id,p); */
}
static int success=0;
int load_termcap(char *termtype){
if(!termtype) termtype=getenv("TERM");
if(!termtype) termtype="unknown";
success=tgetent(term_buffer, termtype);
if(success<0){ printf("Could not access the 'termcap' data base.\n"); return 0; }
if(success==0){ printf("Terminal type `%s' is not defined.\n", termtype);return 0;}
screen_width=tgetnum("co");
screen_height=tgetnum("li");
if(screen_width<1 || screen_width>255) screen_width=80;
if(screen_height<1 || screen_height>255) screen_height=24;
erase_to_end_of_line= tgetstr("ce",&term_p);
termcap_add("kP",MP_KEY_PGUP);
termcap_add("kN",MP_KEY_PGDWN);
termcap_add("kh",MP_KEY_HOME);
termcap_add("kH",MP_KEY_END);
termcap_add("kI",MP_KEY_INS);
termcap_add("kD",MP_KEY_DEL);
termcap_add("kb",MP_KEY_BS);
termcap_add("kl",MP_KEY_LEFT);
termcap_add("kd",MP_KEY_DOWN);
termcap_add("ku",MP_KEY_UP);
termcap_add("kr",MP_KEY_RIGHT);
termcap_add("k0",MP_KEY_F+0);
termcap_add("k1",MP_KEY_F+1);
termcap_add("k2",MP_KEY_F+2);
termcap_add("k3",MP_KEY_F+3);
termcap_add("k4",MP_KEY_F+4);
termcap_add("k5",MP_KEY_F+5);
termcap_add("k6",MP_KEY_F+6);
termcap_add("k7",MP_KEY_F+7);
termcap_add("k8",MP_KEY_F+8);
termcap_add("k9",MP_KEY_F+9);
termcap_add("k;",MP_KEY_F+10);
return getch2_key_db;
}
#endif
void get_screen_size(void){
#ifdef CONFIG_IOCTL
struct winsize ws;
if (ioctl(0, TIOCGWINSZ, &ws) < 0 || !ws.ws_row || !ws.ws_col) return;
/* printf("Using IOCTL\n"); */
screen_width=ws.ws_col;
screen_height=ws.ws_row;
#endif
}
bool getch2(struct input_ctx *input_ctx)
{
int retval = read(0, &getch2_buf[getch2_len], BUF_LEN-getch2_len);
/* Return false on EOF to stop running select() on the FD, as it'd
* trigger all the time. Note that it's possible to get temporary
* EOF on terminal if the user presses ctrl-d, but that shouldn't
* happen if the terminal state change done in getch2_enable()
* works.
*/
if (retval < 1)
return retval;
getch2_len += retval;
while (getch2_len > 0 && (getch2_len > 1 || getch2_buf[0] != 27)) {
int i, len, code;
/* First find in the TERMCAP database: */
for (i = 0; i < getch2_key_db; i++) {
if ((len = getch2_keys[i].len) <= getch2_len)
if(memcmp(getch2_keys[i].chars, getch2_buf, len) == 0) {
code = getch2_keys[i].code;
goto found;
}
}
/* We always match some keypress here, with length 1 if nothing else.
* Since some of the cases explicitly test remaining buffer length
* having a keycode only partially read in the buffer could incorrectly
* use the first byte as an independent character.
* However the buffer is big enough that this shouldn't happen too
* easily, and it's been this way for years without many complaints.
* I see no simple fix as there's no easy test which would tell
* whether a string must be part of a longer keycode. */
len = 1;
code = getch2_buf[0];
/* Check the well-known codes... */
if (code != 27) {
if (code == 'A'-64) code = MP_KEY_HOME;
else if (code == 'E'-64) code = MP_KEY_END;
else if (code == 'D'-64) code = MP_KEY_DEL;
else if (code == 'H'-64) code = MP_KEY_BS;
else if (code == 'U'-64) code = MP_KEY_PGUP;
else if (code == 'V'-64) code = MP_KEY_PGDWN;
else if (code == 8 || code==127) code = MP_KEY_BS;
else if (code == 10 || code==13) {
if (getch2_len > 1) {
int c = getch2_buf[1];
if ((c == 10 || c == 13) && (c != code))
len = 2;
}
code = MP_KEY_ENTER;
} else {
int utf8len = bstr_parse_utf8_code_length(code);
if (utf8len > 0 && utf8len <= getch2_len) {
struct bstr s = { getch2_buf, utf8len };
int unicode = bstr_decode_utf8(s, NULL);
if (unicode > 0) {
len = utf8len;
code = unicode;
}
}
}
}
else if (getch2_len > 1) {
int c = getch2_buf[1];
if (c == 27) {
code = MP_KEY_ESC;
len = 2;
goto found;
}
if (c >= '0' && c <= '9') {
code = c-'0'+MP_KEY_F;
len = 2;
goto found;
}
if (getch2_len >= 4 && c == '[' && getch2_buf[2] == '[') {
int c = getch2_buf[3];
if (c >= 'A' && c < 'A'+12) {
code = MP_KEY_F+1 + c-'A';
len = 4;
goto found;
}
}
if ((c == '[' || c == 'O') && getch2_len >= 3) {
int c = getch2_buf[2];
const int ctable[] = {
MP_KEY_UP, MP_KEY_DOWN, MP_KEY_RIGHT, MP_KEY_LEFT, 0,
MP_KEY_END, MP_KEY_PGDWN, MP_KEY_HOME, MP_KEY_PGUP, 0, 0, MP_KEY_INS, 0, 0, 0,
MP_KEY_F+1, MP_KEY_F+2, MP_KEY_F+3, MP_KEY_F+4};
if (c >= 'A' && c <= 'S')
if (ctable[c - 'A']) {
code = ctable[c - 'A'];
len = 3;
goto found;
}
}
if (getch2_len >= 4 && c == '[' && getch2_buf[3] == '~') {
int c = getch2_buf[2];
const int ctable[8] = {MP_KEY_HOME, MP_KEY_INS, MP_KEY_DEL, MP_KEY_END, MP_KEY_PGUP, MP_KEY_PGDWN, MP_KEY_HOME, MP_KEY_END};
if (c >= '1' && c <= '8') {
code = ctable[c - '1'];
len = 4;
goto found;
}
}
if (getch2_len >= 5 && c == '[' && getch2_buf[4] == '~') {
int i = getch2_buf[2] - '0';
int j = getch2_buf[3] - '0';
if (i >= 0 && i <= 9 && j >= 0 && j <= 9) {
const short ftable[20] = {
11,12,13,14,15, 17,18,19,20,21,
23,24,25,26,28, 29,31,32,33,34 };
int a = i*10 + j;
for (i = 0; i < 20; i++)
if (ftable[i] == a) {
code = MP_KEY_F+1 + i;
len = 5;
goto found;
}
}
}
}
found:
getch2_len -= len;
for (i = 0; i < getch2_len; i++)
getch2_buf[i] = getch2_buf[len+i];
mp_input_put_key(input_ctx, code);
}
return true;
}
static volatile int getch2_active=0;
static volatile int getch2_enabled=0;
static void do_activate_getch2(void)
{
if (getch2_active)
return;
#ifdef HAVE_TERMIOS
struct termios tio_new;
tcgetattr(0,&tio_new);
if (!tio_orig_set) {
tio_orig = tio_new;
tio_orig_set = 1;
}
tio_new.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
tio_new.c_cc[VMIN] = 1;
tio_new.c_cc[VTIME] = 0;
tcsetattr(0,TCSANOW,&tio_new);
#endif
getch2_active=1;
}
static void do_deactivate_getch2(void)
{
if (!getch2_active)
return;
#ifdef HAVE_TERMIOS
if (tio_orig_set) {
// once set, it will never be set again
// so we can cast away volatile here
tcsetattr(0, TCSANOW, (const struct termios *) &tio_orig);
}
#endif
getch2_active=0;
}
// sigaction wrapper
static int setsigaction(int signo, void (*handler) (int),
int flags, bool do_mask)
{
struct sigaction sa;
sa.sa_handler = handler;
if(do_mask)
sigfillset(&sa.sa_mask);
else
sigemptyset(&sa.sa_mask);
sa.sa_flags = flags;
return sigaction(signo, &sa, NULL);
}
void getch2_poll(void){
if (!getch2_enabled)
return;
// check if stdin is in the foreground process group
int newstatus = (tcgetpgrp(0) == getpgrp());
// and activate getch2 if it is, deactivate otherwise
if (newstatus)
do_activate_getch2();
else
do_deactivate_getch2();
}
static void stop_sighandler(int signum)
{
do_deactivate_getch2();
// note: for this signal, we use SA_RESETHAND but do NOT mask signals
// so this will invoke the default handler
raise(SIGTSTP);
}
static void continue_sighandler(int signum)
{
// SA_RESETHAND has reset SIGTSTP, so we need to restore it here
setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
getch2_poll();
}
static void quit_request_sighandler(int signum)
{
async_quit_request = 1;
}
void getch2_enable(void){
if (getch2_enabled)
return;
// handlers to fix terminal settings
setsigaction(SIGCONT, continue_sighandler, 0, true);
setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
setsigaction(SIGINT, quit_request_sighandler, SA_RESETHAND, false);
setsigaction(SIGTTIN, SIG_IGN, 0, true);
do_activate_getch2();
getch2_enabled = 1;
}
void getch2_disable(void){
if (!getch2_enabled)
return;
// restore signals
setsigaction(SIGCONT, SIG_DFL, 0, false);
setsigaction(SIGTSTP, SIG_DFL, 0, false);
setsigaction(SIGINT, SIG_DFL, 0, false);
setsigaction(SIGTTIN, SIG_DFL, 0, false);
do_deactivate_getch2();
getch2_enabled = 0;
}
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