osdep/getch2.c

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