osdep/getch2.c

   1 /*
   2  * GyS-TermIO v2.0 (for GySmail v3)
   3  * a very small replacement of ncurses library
   4  *
   5  * copyright (C) 1999 A'rpi/ESP-team
   6  *
   7  * This file is part of MPlayer.
   8  *
   9  * MPlayer is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * MPlayer is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include "config.h"
  25
  26 //#define HAVE_TERMCAP
  27 #if !defined(__OS2__) && !defined(__MORPHOS__)
  28 #define CONFIG_IOCTL
  29 #endif
  30
  31 #define MAX_KEYS 64
  32 #define BUF_LEN 256
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <sys/time.h>
  38 #include <sys/types.h>
  39 #ifdef CONFIG_IOCTL
  40 #include <sys/ioctl.h>
  41 #endif
  42
  43 #ifdef HAVE_TERMIOS
  44 #ifdef HAVE_TERMIOS_H
  45 #include <termios.h>
  46 #endif
  47 #ifdef HAVE_SYS_TERMIOS_H
  48 #include <sys/termios.h>
  49 #endif
  50 #endif
  51
  52 #if defined(HAVE_LANGINFO) && defined(CONFIG_ICONV)
  53 #include <locale.h>
  54 #include <langinfo.h>
  55 #endif
  56
  57 #include <unistd.h>
  58
  59 #include "mp_fifo.h"
  60 #include "keycodes.h"
  61 #include "getch2.h"
  62
  63 #ifdef HAVE_TERMIOS
  64 static struct termios tio_orig;
  65 #endif
  66 static int getch2_len=0;
  67 static char getch2_buf[BUF_LEN];
  68
  69 int screen_width=80;
  70 int screen_height=24;
  71 char * erase_to_end_of_line = NULL;
  72
  73 typedef struct {
  74   int len;
  75   int code;
  76   char chars[8];
  77 } keycode_st;
  78 static keycode_st getch2_keys[MAX_KEYS];
  79 static int getch2_key_db=0;
  80
  81 #ifdef HAVE_TERMCAP
  82
  83 #if 0
  84 #include <termcap.h>
  85 #else
  86 int tgetent(char *BUFFER, char *TERMTYPE);
  87 int tgetnum(char *NAME);
  88 int tgetflag(char *NAME);
  89 char *tgetstr(char *NAME, char **AREA);
  90 #endif
  91
  92 static char term_buffer[4096];
  93 static char term_buffer2[4096];
  94 static char *term_p=term_buffer2;
  95
  96 static void termcap_add(char *id,int code){
  97 char *p=tgetstr(id,&term_p);
  98   if(!p) return;
  99   if(getch2_key_db>=MAX_KEYS) return;
 100   getch2_keys[getch2_key_db].len=strlen(p);
 101   strncpy(getch2_keys[getch2_key_db].chars,p,8);
 102   getch2_keys[getch2_key_db].code=code;
 103   ++getch2_key_db;
 104 /*  printf("%s=%s\n",id,p); */
 105 }
 106
 107 static int success=0;
 108
 109 int load_termcap(char *termtype){
 110   if(!termtype) termtype=getenv("TERM");
 111   if(!termtype) termtype="unknown";
 112   success=tgetent(term_buffer, termtype);
 113   if(success<0){ printf("Could not access the 'termcap' data base.\n"); return 0; }
 114   if(success==0){ printf("Terminal type `%s' is not defined.\n", termtype);return 0;}
 115
 116   screen_width=tgetnum("co");
 117   screen_height=tgetnum("li");
 118   if(screen_width<1 || screen_width>255) screen_width=80;
 119   if(screen_height<1 || screen_height>255) screen_height=24;
 120   erase_to_end_of_line= tgetstr("ce",&term_p);
 121
 122   termcap_add("kP",KEY_PGUP);
 123   termcap_add("kN",KEY_PGDWN);
 124   termcap_add("kh",KEY_HOME);
 125   termcap_add("kH",KEY_END);
 126   termcap_add("kI",KEY_INS);
 127   termcap_add("kD",KEY_DEL);
 128   termcap_add("kb",KEY_BS);
 129   termcap_add("kl",KEY_LEFT);
 130   termcap_add("kd",KEY_DOWN);
 131   termcap_add("ku",KEY_UP);
 132   termcap_add("kr",KEY_RIGHT);
 133   termcap_add("k0",KEY_F+0);
 134   termcap_add("k1",KEY_F+1);
 135   termcap_add("k2",KEY_F+2);
 136   termcap_add("k3",KEY_F+3);
 137   termcap_add("k4",KEY_F+4);
 138   termcap_add("k5",KEY_F+5);
 139   termcap_add("k6",KEY_F+6);
 140   termcap_add("k7",KEY_F+7);
 141   termcap_add("k8",KEY_F+8);
 142   termcap_add("k9",KEY_F+9);
 143   termcap_add("k;",KEY_F+10);
 144   return getch2_key_db;
 145 }
 146
 147 #endif
 148
 149 void get_screen_size(void){
 150 #ifdef CONFIG_IOCTL
 151   struct winsize ws;
 152   if (ioctl(0, TIOCGWINSZ, &ws) < 0 || !ws.ws_row || !ws.ws_col) return;
 153 /*  printf("Using IOCTL\n"); */
 154   screen_width=ws.ws_col;
 155   screen_height=ws.ws_row;
 156 #endif
 157 }
 158
 159 void getch2(struct mp_fifo *fifo)
 160 {
 161     int retval = read(0, &getch2_buf[getch2_len], BUF_LEN-getch2_len);
 162     if (retval < 1)
 163         return;
 164     getch2_len += retval;
 165
 166     while (getch2_len > 0 && (getch2_len > 1 || getch2_buf[0] != 27)) {
 167         int i, len, code;
 168
 169         /* First find in the TERMCAP database: */
 170         for (i = 0; i < getch2_key_db; i++) {
 171             if ((len = getch2_keys[i].len) <= getch2_len)
 172                 if(memcmp(getch2_keys[i].chars, getch2_buf, len) == 0) {
 173                     code = getch2_keys[i].code;
 174                     goto found;
 175                 }
 176         }
 177         /* We always match some keypress here, with length 1 if nothing else.
 178          * Since some of the cases explicitly test remaining buffer length
 179          * having a keycode only partially read in the buffer could incorrectly
 180          * use the first byte as an independent character.
 181          * However the buffer is big enough that this shouldn't happen too
 182          * easily, and it's been this way for years without many complaints.
 183          * I see no simple fix as there's no easy test which would tell
 184          * whether a string must be part of a longer keycode. */
 185         len = 1;
 186         code = getch2_buf[0];
 187         /* Check the well-known codes... */
 188         if (code != 27) {
 189             if (code == 'A'-64) code = KEY_HOME;
 190             else if (code == 'E'-64) code = KEY_END;
 191             else if (code == 'D'-64) code = KEY_DEL;
 192             else if (code == 'H'-64) code = KEY_BS;
 193             else if (code == 'U'-64) code = KEY_PGUP;
 194             else if (code == 'V'-64) code = KEY_PGDWN;
 195             else if (code == 8 || code==127) code = KEY_BS;
 196             else if (code == 10 || code==13) {
 197                 if (getch2_len > 1) {
 198                     int c = getch2_buf[1];
 199                     if ((c == 10 || c == 13) && (c != code))
 200                         len = 2;
 201                 }
 202                 code = KEY_ENTER;
 203             }
 204         }
 205         else if (getch2_len > 1) {
 206             int c = getch2_buf[1];
 207             if (c == 27) {
 208                 code = KEY_ESC;
 209                 len = 2;
 210                 goto found;
 211             }
 212             if (c >= '0' && c <= '9') {
 213                 code = c-'0'+KEY_F;
 214                 len = 2;
 215                 goto found;
 216             }
 217             if (getch2_len >= 4 && c == '[' && getch2_buf[2] == '[') {
 218                 int c = getch2_buf[3];
 219                 if (c >= 'A' && c < 'A'+12) {
 220                     code = KEY_F+1 + c-'A';
 221                     len = 4;
 222                     goto found;
 223                 }
 224             }
 225             if ((c == '[' || c == 'O') && getch2_len >= 3) {
 226                 int c = getch2_buf[2];
 227                 const short ctable[] = {
 228                     KEY_UP, KEY_DOWN, KEY_RIGHT, KEY_LEFT, 0,
 229                     KEY_END, KEY_PGDWN, KEY_HOME, KEY_PGUP, 0, 0, KEY_INS, 0, 0, 0,
 230                     KEY_F+1, KEY_F+2, KEY_F+3, KEY_F+4};
 231                 if (c >= 'A' && c <= 'S')
 232                     if (ctable[c - 'A']) {
 233                         code = ctable[c - 'A'];
 234                         len = 3;
 235                         goto found;
 236                     }
 237             }
 238             if (getch2_len >= 4 && c == '[' && getch2_buf[3] == '~') {
 239                 int c = getch2_buf[2];
 240                 const int ctable[8] = {KEY_HOME, KEY_INS, KEY_DEL, KEY_END, KEY_PGUP, KEY_PGDWN, KEY_HOME, KEY_END};
 241                 if (c >= '1' && c <= '8') {
 242                     code = ctable[c - '1'];
 243                     len = 4;
 244                     goto found;
 245                 }
 246             }
 247             if (getch2_len >= 5 && c == '[' && getch2_buf[4] == '~') {
 248                 int i = getch2_buf[2] - '0';
 249                 int j = getch2_buf[3] - '0';
 250                 if (i >= 0 && i <= 9 && j >= 0 && j <= 9) {
 251                     const short ftable[20] = {
 252                         11,12,13,14,15, 17,18,19,20,21,
 253                         23,24,25,26,28, 29,31,32,33,34 };
 254                     int a = i*10 + j;
 255                     for (i = 0; i < 20; i++)
 256                         if (ftable[i] == a) {
 257                             code = KEY_F+1 + i;
 258                             len = 5;
 259                             goto found;
 260                         }
 261                 }
 262             }
 263         }
 264     found:
 265         getch2_len -= len;
 266         for (i = 0; i < getch2_len; i++)
 267             getch2_buf[i] = getch2_buf[len+i];
 268         mplayer_put_key(fifo, code);
 269     }
 270 }
 271
 272 static int getch2_status=0;
 273
 274 void getch2_enable(void){
 275 #ifdef HAVE_TERMIOS
 276 struct termios tio_new;
 277     tcgetattr(0,&tio_orig);
 278     tio_new=tio_orig;
 279     tio_new.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
 280     tio_new.c_cc[VMIN] = 1;
 281     tio_new.c_cc[VTIME] = 0;
 282     tcsetattr(0,TCSANOW,&tio_new);
 283 #endif
 284     getch2_status=1;
 285 }
 286
 287 void getch2_disable(void){
 288     if(!getch2_status) return; // already disabled / never enabled
 289 #ifdef HAVE_TERMIOS
 290     tcsetattr(0,TCSANOW,&tio_orig);
 291 #endif
 292     getch2_status=0;
 293 }
 294
 295 #ifdef CONFIG_ICONV
 296 char* get_term_charset(void)
 297 {
 298     char* charset = NULL;
 299 #ifdef HAVE_LANGINFO
 300     setlocale(LC_CTYPE, "");
 301     charset = strdup(nl_langinfo(CODESET));
 302     setlocale(LC_CTYPE, "C");
 303 #endif
 304     return charset;
 305 }
 306 #endif