summaryrefslogtreecommitdiffstats
path: root/osdep/getch2.c
blob: cff61d3847277ed128d5745886f4c0d045c6122a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/* GyS-TermIO v2.0 (for GySmail v3)          (C) 1999 A'rpi/ESP-team */

#include "config.h"

//#define USE_TERMCAP
#if !defined(__OS2__) && !defined(__MORPHOS__)
#define USE_IOCTL
#endif

#define MAX_KEYS 64
#define BUF_LEN 256

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#ifdef USE_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

#if defined(USE_LANGINFO) && defined(USE_ICONV)
#include <locale.h>
#include <langinfo.h>
#endif

#include <unistd.h>

#include "mp_fifo.h"
#include "keycodes.h"
#include "getch2.h"

#ifdef HAVE_TERMIOS
static struct termios tio_orig;
#endif
static int getch2_len=0;
static 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 USE_TERMCAP

#if 0
#include <termcap.h>
#else
  extern int tgetent (char *BUFFER, char *TERMTYPE);
  extern int tgetnum (char *NAME);
  extern int tgetflag (char *NAME);
  extern 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("cd",&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 USE_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
}

void getch2(struct mp_fifo *fifo)
{
    int retval = read(0, &getch2_buf[getch2_len], BUF_LEN-getch2_len);
    if (retval < 1)
        return;
    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 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 short 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);
    }
}

static int getch2_status=0;

void getch2_enable(void){
#ifdef HAVE_TERMIOS
struct termios tio_new;
    tcgetattr(0,&tio_orig);
    tio_new=tio_orig;
    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_status=1;
}

void getch2_disable(void){
    if(!getch2_status) return; // already disabled / never enabled
#ifdef HAVE_TERMIOS
    tcsetattr(0,TCSANOW,&tio_orig);
#endif
    getch2_status=0;
}

#ifdef USE_ICONV
char* get_term_charset(void)
{
    char* charset = NULL;
#ifdef USE_LANGINFO
    setlocale(LC_CTYPE, "");
    charset = nl_langinfo(CODESET);
    setlocale(LC_CTYPE, "C");
#endif
    return charset;
}
#endif