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Diffstat (limited to 'braille_tsi.c')
| -rw-r--r-- | braille_tsi.c | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/braille_tsi.c b/braille_tsi.c new file mode 100644 index 0000000..8e05d75 --- /dev/null +++ b/braille_tsi.c @@ -0,0 +1,314 @@ +/* bd-tsi.c, TSI specific key bindings and display commands + * + * dotscreen + * A braille interface to unix tty terminals + * Authors: Hadi Bargi Rangin bargi@dots.physics.orst.edu + * Bill Barry barryb@dots.physics.orst.edu + * + * Copyright (c) 1995 by Science Access Project, Oregon State University. + * + * + * This program 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 3, or (at your option) + * any later version. + * + * This program 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 this program (see the file COPYING); if not, see + * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA + * + **************************************************************** + */ + +#include "config.h" +#include "screen.h" +#include "extern.h" +#include "braille.h" + +#ifdef HAVE_BRAILLE + +extern struct display *display; + +struct key2rc { + int key; + int nr; + char *arg1; + char *arg2; +}; + +static int tsi_ctype = 1; /* cursor type, 0,1,2 */ + +static int tsi_line_type; /* indicates number of cells on powerbraille + display 01=20 cells 02=40 cells 03=80 cells */ + +static int display_status_tsi __P((void)); +static int write_line_tsi __P((char*, int, int)); +static void buttonpress_tsi __P((structkey2rc*)); +static void buttonpress_navigator_40 __P((void)); +static void buttonpress_powerbraille_40 __P((void)); +static void buttonpress_powerbraille_80 __P((void)); + +int +bd_init_powerbraille_40() +{ + bd.write_line_braille = write_line_tsi; + bd.buttonpress = buttonpress_powerbraille_40; + bd.bd_response_test = display_status_tsi; + bd.bd_ncells = 40; + tsi_line_type = 2; + return 0; +} + +int +bd_init_powerbraille_80() +{ + bd.write_line_braille = write_line_tsi; + bd.buttonpress = buttonpress_powerbraille_80; + bd.bd_response_test = display_status_tsi; + bd.bd_ncells = 80; + tsi_line_type = 3; + return 0; +} + +int +bd_init_navigator_40() +{ + bd.write_line_braille = write_line_tsi; + bd.buttonpress = buttonpress_navigator_40; + bd.bd_response_test = display_status_tsi; + bd.bd_ncells = 40; + tsi_line_type = 2; + return 0; +} + +static int +display_status_tsi() +{ + char obuf[3], ibuf[20]; + int r; + + obuf[0] = 0xff; + obuf[1] = 0xff; + obuf[2] = 0x0a; + r = read(bd.bd_fd, ibuf, 20); /* flush the input port */ + r = write(bd.bd_fd, obuf, 3); + if (r != 3) + return -1; + + /* we have written to the display asking for a response + we wait 1 second for the response, read it and if no + response we wait 2 seconds, if still no response, + return -1 to indicate no braille display available */ + + sleep(1); + r = read(bd.bd_fd, ibuf, 2); + if (r == -1) { + sleep(2); + r = read(bd.bd_fd, ibuf, 2); + } + + debug2("first chars from braille display %d %d\n", ibuf[0], ibuf[1]); + if (r != 2 || ibuf[0] != 0 || ibuf[1] != 5) + return -1; + + r = read(bd.bd_fd, ibuf, 2); + if (r != 2) + return -1; + + debug2("braille display size:%d dots:%d\n", ibuf[0], ibuf[1]); + bd.bd_ncells = (unsigned char)ibuf[0]; + if (bd.bd_ncells <= 1) + return -1; + + r = read(bd.bd_fd, ibuf, 1); + if (r != 1) + return -1; + + if (ibuf[0] == 'V') + r = read(bd.bd_fd, ibuf, 3); + else + r = read(bd.bd_fd, ibuf + 1, 2) + 1; + + if (r != 3) + return -1; + + ibuf[3] = 0; + debug1("braille display version %s\n", ibuf); + bd.bd_version = atof(ibuf); + return 0; +} + +static int +write_line_tsi(char *bstr, int line_length, int cursor_pos) +{ + int obp, i; + bd.bd_obuf[0] = 0xff; + bd.bd_obuf[1] = 0xff; + bd.bd_obuf[2] = tsi_line_type; + bd.bd_obuf[3] = 0x07; + bd.bd_obuf[4] = cursor_pos; + bd.bd_obuf[5] = tsi_ctype; + obp = 6; + + for (i = 0; i < line_length; i++) { + bd.bd_obuf[2*i + obp] = 0; + bd.bd_obuf[2*i + 1 + obp] = bd.bd_btable[(int)(unsigned char)bstr[i]]; + } + for (i = line_length; i < bd.bd_ncells; i++) { + bd.bd_obuf[2*i + obp] = 0; + bd.bd_obuf[2*i + 1 + obp] = bd.bd_btable[(int)' ']; + } + + bd.bd_obuflen = 2*bd.bd_ncells + obp; + return 0; +} + +static struct key2rc keys_navigator_40[] = { + {0x4000000, RC_STUFF, "-k", "kl"}, /* 1 */ + {0x10000000, RC_STUFF, "-k", "kr"}, /* 3 */ + {0x8000000, RC_STUFF, "-k", "ku"}, /* 2 */ + {0x20000000, RC_STUFF, "-k", "kd"}, /* 4 */ + {0x2000, RC_BD_BC_LEFT, 0, 0}, /* 6 */ + {0x8000, RC_BD_BC_RIGHT, 0, 0}, /* 8 */ + {0x4000, RC_BD_BC_UP, 0, 0}, /* 7 */ + {0x10000, RC_BD_BC_DOWN, 0, 0}, /* 9 */ + {0x6000, RC_BD_UPPER_LEFT, 0, 0}, /* 6, 7 */ + {0xc000, RC_BD_UPPER_RIGHT, 0, 0}, /* 7, 8 */ + {0x12000, RC_BD_LOWER_LEFT, 0, 0}, /* 6, 9 */ + {0x18000, RC_BD_LOWER_RIGHT, 0, 0}, /* 8, 9 */ + {0xa000, RC_BD_INFO, "1032", 0}, /* bc 6, 8 */ + {0x14000000, RC_BD_INFO, "2301", 0}, /* sc 1, 3 */ + {0x4008000, RC_BD_INFO, "3330", 0}, /* bc+sc 1, 8 */ + {0x8010000, RC_BD_BELL, 0, 0}, /* 2, 9 */ + {0x8004000, RC_BD_EIGHTDOT, 0, 0}, /* 2, 7 */ + {0x40000000, RC_STUFF, "\015", 0}, /* 5 */ + {0x20000, RC_BD_LINK, 0, 0}, /* 10 */ + {0x10002000, RC_BD_SCROLL, 0, 0}, /* 3, 6 */ + {0x20010000, RC_BD_NCRC, "+", 0}, /* 4, 9 */ + {0x14000, RC_BD_SKIP, 0, 0}, /* 7, 9*/ + {-1, RC_ILLEGAL, 0, 0} +}; + +static struct key2rc keys_powerbraille_40[] = { + {0x4000000, RC_STUFF, "-k", "kl"}, /* 1 */ + {0x10000000, RC_STUFF, "-k", "kr"}, /* 3 */ + {0x8000000, RC_STUFF, "-k", "ku"}, /* 2 */ + {0x20000000, RC_STUFF, "-k", "kd"}, /* 4 */ + {0x2000, RC_BD_BC_LEFT, 0, 0}, /* 6 */ + {0x8000, RC_BD_BC_RIGHT, 0, 0}, /* 8 */ + {0x4000, RC_BD_BC_UP, 0, 0}, /* 7 */ + {0x10000, RC_BD_BC_DOWN, 0, 0}, /* 9 */ + {0x8002000, RC_BD_UPPER_LEFT, 0, 0}, /* 2, 6 */ + {0xc000, RC_BD_UPPER_RIGHT, 0, 0}, /* 7, 8 */ + {0x20002000, RC_BD_LOWER_LEFT, 0, 0}, /* 3, 6 */ + {0x18000, RC_BD_LOWER_RIGHT, 0, 0}, /* 8, 9 */ + {0x8008000, RC_BD_INFO, "1032", 0}, /* bc 2, 8 */ + {0x6000, RC_BD_INFO, "2301", 0}, /* 6, 7 */ + {0x8004000, RC_BD_INFO, "3330", 0}, /* bc+sc 2, 7 */ + {0x8010000, RC_BD_BELL, 0, 0}, /* 2, 9 */ + {0x20008000, RC_BD_EIGHTDOT, 0, 0}, /* 4, 6 */ + {0x40000000, RC_STUFF, "\015", 0}, /* 5 */ + {0x20000, RC_BD_LINK, 0, 0}, /* 10 */ + {0xa000, RC_BD_SCROLL, 0, 0}, /* 6, 8 */ + {0x20010000, RC_BD_NCRC, "+", 0}, /* 4, 9 */ + {0x20004000, RC_BD_SKIP, 0, 0}, /* 4, 7 */ + {-1, RC_ILLEGAL, 0, 0} +}; + +static struct key2rc keys_powerbraille_80[] = { + {0x4000000, RC_STUFF, "-k", "kl"}, /* 1 */ + {0x10000000, RC_STUFF, "-k", "kr"}, /* 3 */ + {0x8000000, RC_STUFF, "-k", "ku"}, /* 2 */ + {0x20000000, RC_STUFF, "-k", "kd"}, /* 4 */ + {0x40000, RC_BD_BC_LEFT, 0, 0}, /* 6 */ + {0x100000, RC_BD_BC_RIGHT, 0, 0}, /* 8 */ + {0x4000, RC_BD_BC_UP, 0, 0}, /* 7 */ + {0x10000, RC_BD_BC_DOWN, 0, 0}, /* 9 */ + {0x44000, RC_BD_UPPER_LEFT, 0, 0}, /* 6, 7 */ + {0x104000, RC_BD_UPPER_RIGHT, 0, 0}, /* 7, 8 */ + {0x50000, RC_BD_LOWER_LEFT, 0, 0}, /* 6, 9 */ + {0x110000, RC_BD_LOWER_RIGHT, 0, 0}, /* 8, 9 */ + {0x8100000, RC_BD_INFO, "1032", 0}, /* 2, 8 */ + {0x8040000, RC_BD_INFO, "2301", 0}, /* 2, 6 */ + {0x140000, RC_BD_INFO, "3330", 0}, /* 6, 8 */ + {0x8010000, RC_BD_BELL, 0, 0}, /* 2, 9 */ + {0x8004000, RC_BD_EIGHTDOT, 0, 0}, /* 2, 7 */ + {0x40000000, RC_STUFF, "\015", 0}, /* 5 */ + {0x20000, RC_BD_LINK, 0, 0}, /* 10 */ + {0x20004000, RC_BD_SCROLL, 0, 0}, /* 4, 7 */ + {0x20010000, RC_BD_NCRC, "+", 0}, /* 4, 9 */ + {0x40010000, RC_BD_SKIP, 0, 0}, /* 5, 9 */ + {-1, RC_ILLEGAL, 0, 0} +}; + +static void +buttonpress_tsi(struct key2rc *tab) +{ + int i, nb; + int bkeys; + unsigned char buf[10]; + nb = read(bd.bd_fd, buf, 10); + debug1("buttonpress_tsi: read %d bytes\n", nb); + for (i = 0, bkeys = 0; i < nb; i++) { + switch (buf[i] & 0xE0) { + case 0x00: bkeys += ((int)(buf[i] & 0x1f)); break; + case 0x20: bkeys += ((int)(buf[i] & 0x1f) << 5); break; + case 0x40: bkeys += ((int)(buf[i] & 0x1f) << 9); break; + case 0x60: bkeys += ((int)(buf[i] & 0x1f) << 13); break; + case 0xA0: bkeys += ((int)(buf[i] & 0x1f) << 18); break; + case 0xC0: bkeys += ((int)(buf[i] & 0x1f) << 22); break; + case 0xE0: bkeys += ((int)(buf[i] & 0x1f) << 26); break; + default: break; + } + } + debug1("bkeys %x\n", bkeys); + + for (i = 0; tab[i].key != -1; i++) + if (bkeys == tab[i].key) + break; + + debug1("bkey index %d\n", i); + + if (tab[i].key != -1 && tab[i].nr != RC_ILLEGAL) { + char *args[3]; + int argl[2]; + + struct action act; + args[0] = tab[i].arg1; + args[1] = tab[i].arg2; + args[2] = 0; + argl[0] = args[0] ? strlen(args[0]) : 0; + argl[1] = args[1] ? strlen(args[1]) : 0; + act.nr = tab[i].nr; + act.args = args; + act.argl = argl; + display = bd.bd_dpy; + DoAction(&act, -2); + } +} + +static void +buttonpress_navigator_40() +{ + buttonpress_tsi(keys_navigator_40); +} + +static void +buttonpress_powerbraille_40() +{ + buttonpress_tsi(keys_powerbraille_40); +} + +static void +buttonpress_powerbraille_80() +{ + buttonpress_tsi(keys_powerbraille_80); +} + +#endif /* HAVE_BRAILLE */ |