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042901940f
mpv/osdep/getch2.c
Rudolf Polzer a70adbfe65 getch2: request at least 1 byte of input each read 
fixes issue with | less, where mplayer broke less's terminal
expectations and made less quit

Note this means that read() will be blocking again. Should be ok, as we
always check via select() before reading.
2012-09-19 14:57:35 +02:00

323 lines
9.7 KiB
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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 "bstr.h"
#include "mp_fifo.h"
#include "input/keycodes.h"
#include "getch2.h"
#ifdef HAVE_TERMIOS
static struct termios tio_orig;
#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",KEY_PGUP);
termcap_add("kN",KEY_PGDWN);
termcap_add("kh",KEY_HOME);
termcap_add("kH",KEY_END);
termcap_add("kI",KEY_INS);
termcap_add("kD",KEY_DEL);
termcap_add("kb",KEY_BS);
termcap_add("kl",KEY_LEFT);
termcap_add("kd",KEY_DOWN);
termcap_add("ku",KEY_UP);
termcap_add("kr",KEY_RIGHT);
termcap_add("k0",KEY_F+0);
termcap_add("k1",KEY_F+1);
termcap_add("k2",KEY_F+2);
termcap_add("k3",KEY_F+3);
termcap_add("k4",KEY_F+4);
termcap_add("k5",KEY_F+5);
termcap_add("k6",KEY_F+6);
termcap_add("k7",KEY_F+7);
termcap_add("k8",KEY_F+8);
termcap_add("k9",KEY_F+9);
termcap_add("k;",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 mp_fifo *fifo)
{
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 = KEY_HOME;
else if (code == 'E'-64) code = KEY_END;
else if (code == 'D'-64) code = KEY_DEL;
else if (code == 'H'-64) code = KEY_BS;
else if (code == 'U'-64) code = KEY_PGUP;
else if (code == 'V'-64) code = KEY_PGDWN;
else if (code == 8 || code==127) code = 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 = 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 = KEY_ESC;
len = 2;
goto found;
}
if (c >= '0' && c <= '9') {
code = c-'0'+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 = KEY_F+1 + c-'A';
len = 4;
goto found;
}
}
if ((c == '[' || c == 'O') && getch2_len >= 3) {
int c = getch2_buf[2];
const int ctable[] = {
KEY_UP, KEY_DOWN, KEY_RIGHT, KEY_LEFT, 0,
KEY_END, KEY_PGDWN, KEY_HOME, KEY_PGUP, 0, 0, KEY_INS, 0, 0, 0,
KEY_F+1, KEY_F+2, KEY_F+3, 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] = {KEY_HOME, KEY_INS, KEY_DEL, KEY_END, KEY_PGUP, KEY_PGDWN, KEY_HOME, 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 = 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];
mplayer_put_key(fifo, code);
}
return true;
}
static volatile int getch2_status=0;
static void do_enable_getch2(void)
{
#ifdef HAVE_TERMIOS
struct termios tio_new;
tcgetattr(0,&tio_new);
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
}
static void continue_sighandler(int signum)
{
if (getch2_status)
do_enable_getch2();
}
void getch2_enable(void){
#ifdef HAVE_TERMIOS
tcgetattr(0,&tio_orig);
do_enable_getch2();
#endif
getch2_status=1;
signal(SIGCONT,continue_sighandler);
}
void getch2_disable(void){
if(!getch2_status) return; // already disabled / never enabled
getch2_status=0;
#ifdef HAVE_TERMIOS
tcsetattr(0,TCSANOW,&tio_orig);
#endif
}
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