2.11BSD#431 - /usr/src/ucb/ex/ex_tty.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #if !defined(lint) && defined(DOSCCS)
   8: static char *sccsid = "@(#)ex_tty.c	7.10.1 (2.11BSD GTE) 12/9/94";
   9: #endif
  10: 
  11: #include "ex.h"
  12: #include "ex_tty.h"
  13: 
  14: /*
  15:  * Terminal type initialization routines,
  16:  * and calculation of flags at entry or after
  17:  * a shell escape which may change them.
  18:  */
  19: /* short	ospeed = -1;	mjm: def also in tputs.c of termcap.a  */
  20: 
  21: gettmode()
  22: {
  23: 
  24: #ifndef USG3TTY
  25:     if (gtty(1, &tty) < 0)
  26:         return;
  27:     if (ospeed != tty.sg_ospeed)
  28:         value(SLOWOPEN) = tty.sg_ospeed < B1200;
  29:     ospeed = tty.sg_ospeed;
  30:     normf = tty.sg_flags;
  31:     GT = (tty.sg_flags & XTABS) != XTABS && !XT;
  32:     NONL = (tty.sg_flags & CRMOD) == 0;
  33: #else
  34:     if (ioctl(1, TCGETA, &tty) < 0)
  35:         return;
  36:     if (ospeed != (tty.c_cflag & CBAUD))    /* mjm */
  37:         value(SLOWOPEN) = (tty.c_cflag & CBAUD) < B1200;
  38:     ospeed = tty.c_cflag & CBAUD;
  39:     normf = tty;
  40:     GT = (tty.c_oflag & TABDLY) != TAB3 && !XT;
  41:     NONL = (tty.c_oflag & ONLCR) == 0;
  42: #endif
  43: }
  44: 
  45: char *xPC;
  46: char **sstrs[] = {
  47:     &AL, &BC, &BT, &CD, &CE, &CL, &CM, &xCR, &CS, &DC, &DL, &DM, &DO,
  48:     &ED, &EI, &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9,
  49:     &HO, &IC, &IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU, &LL, &ND, &xNL,
  50:     &xPC, &RC, &SC, &SE, &SF, &SO, &SR, &TA, &TE, &TI, &UP, &VB, &VS, &VE,
  51:     &AL_PARM, &DL_PARM, &UP_PARM, &DOWN_PARM, &LEFT_PARM, &RIGHT_PARM
  52: };
  53: bool *sflags[] = {
  54:     &AM, &BS, &DA, &DB, &EO, &HC, &IN, &MI, &NC, &NS, &OS, &UL,
  55:     &XB, &XN, &XT, &XX
  56: };
  57: char **fkeys[10] = {
  58:     &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9
  59: };
  60: setterm(type)
  61:     char *type;
  62: {
  63:     char *tgoto();
  64:     register int unknown;
  65:     char ltcbuf[TCBUFSIZE];
  66: 
  67:     if (type[0] == 0)
  68:         type = "xx";
  69:     unknown = 0;
  70:     putpad(TE);
  71:     if (tgetent(ltcbuf, type) != 1) {
  72:         unknown++;
  73:         CP(ltcbuf, "xx|dumb:");
  74:     }
  75:     setsize();
  76:     aoftspace = tspace;
  77:     zap();
  78:     /*
  79: 	 * Initialize keypad arrow keys.
  80: 	 */
  81:     arrows[0].cap = KU; arrows[0].mapto = "k"; arrows[0].descr = "up";
  82:     arrows[1].cap = KD; arrows[1].mapto = "j"; arrows[1].descr = "down";
  83:     arrows[2].cap = KL; arrows[2].mapto = "h"; arrows[2].descr = "left";
  84:     arrows[3].cap = KR; arrows[3].mapto = "l"; arrows[3].descr = "right";
  85:     arrows[4].cap = KH; arrows[4].mapto = "H"; arrows[4].descr = "home";
  86: 
  87:     /*
  88: 	 * Handle funny termcap capabilities
  89: 	 */
  90:     if (CS && SC && RC) {
  91:         if (AL==NULL) AL="";
  92:         if (DL==NULL) DL="";
  93:     }
  94:     if (AL_PARM && AL==NULL) AL="";
  95:     if (DL_PARM && DL==NULL) DL="";
  96:     if (IC && IM==NULL) IM="";
  97:     if (IC && EI==NULL) EI="";
  98:     if (!GT) BT=NULL;   /* If we can't tab, we can't backtab either */
  99: 
 100: #ifdef TIOCLGET
 101:     /*
 102: 	 * Now map users susp char to ^Z, being careful that the susp
 103: 	 * overrides any arrow key, but only for hackers (=new tty driver).
 104: 	 */
 105:     {
 106:         static char sc[2];
 107:         int i, fnd;
 108: 
 109:         ioctl(0, TIOCGETD, &ldisc);
 110:         if (ldisc == NTTYDISC) {
 111:             sc[0] = olttyc.t_suspc;
 112:             sc[1] = 0;
 113:             if (olttyc.t_suspc == CTRL(z)) {
 114:                 for (i=0; i<=4; i++)
 115:                     if (arrows[i].cap &&
 116:                         arrows[i].cap[0] == CTRL(z))
 117:                         addmac(sc, NULL, NULL, arrows);
 118:             } else
 119:                 addmac(sc, "\32", "susp", arrows);
 120:         }
 121:     }
 122: #endif
 123: 
 124:     if (tgoto(CM, 2, 2)[0] == 'O')  /* OOPS */
 125:         CA = 0, CM = 0;
 126:     else
 127:         CA = 1, costCM = cost(tgoto(CM, 8, 10));
 128:     costSR = cost(SR);
 129:     costAL = cost(AL);
 130:     costDP = cost(tgoto(DOWN_PARM, 10, 10));
 131:     costLP = cost(tgoto(LEFT_PARM, 10, 10));
 132:     costRP = cost(tgoto(RIGHT_PARM, 10, 10));
 133:     PC = xPC ? xPC[0] : 0;
 134:     aoftspace = tspace;
 135:     CP(ttytype, longname(ltcbuf, type));
 136:     /* proper strings to change tty type */
 137:     termreset();
 138:     gettmode();
 139:     value(REDRAW) = AL && DL;
 140:     value(OPTIMIZE) = !CA && !GT;
 141:     if (ospeed == B1200 && !value(REDRAW))
 142:         value(SLOWOPEN) = 1;    /* see also gettmode above */
 143:     if (unknown)
 144:         serror("%s: Unknown terminal type", type);
 145: }
 146: 
 147: setsize()
 148: {
 149:     register int l, i;
 150:     struct winsize win;
 151: 
 152:     if (ioctl(0, TIOCGWINSZ, &win) < 0) {
 153:         i = LINES = tgetnum("li");
 154:         COLUMNS = tgetnum("co");
 155:     } else {
 156:         if ((LINES = winsz.ws_row = win.ws_row) == 0)
 157:             LINES = tgetnum("li");
 158:         i = LINES;
 159:         if ((COLUMNS = winsz.ws_col = win.ws_col) == 0)
 160:             COLUMNS = tgetnum("co");
 161:     }
 162:     if (LINES <= 5)
 163:         LINES = 24;
 164:     if (LINES > TUBELINES)
 165:         LINES = TUBELINES;
 166:     l = LINES;
 167:     if (ospeed < B1200)
 168:         l = 9;  /* including the message line at the bottom */
 169:     else if (ospeed < B2400)
 170:         l = 17;
 171:     if (l > LINES)
 172:         l = LINES;
 173:     if (COLUMNS <= 4)
 174:         COLUMNS = 1000;
 175:     options[WINDOW].ovalue = options[WINDOW].odefault = l - 1;
 176:     if (defwind) options[WINDOW].ovalue = defwind;
 177:     options[SCROLL].ovalue = options[SCROLL].odefault = HC ? 11 : ((l-1) / 2);
 178:     if (i <= 0)
 179:         LINES = 2;
 180: }
 181: 
 182: zap()
 183: {
 184:     register char *namp;
 185:     register bool **fp;
 186:     register char ***sp;
 187: 
 188:     namp = "ambsdadbeohcinmincnsosulxbxnxtxx";
 189:     fp = sflags;
 190:     do {
 191:         *(*fp++) = tgetflag(namp);
 192:         namp += 2;
 193:     } while (*namp);
 194:     namp = "albcbtcdceclcmcrcsdcdldmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullndnlpcrcscsesfsosrtatetiupvbvsveALDLUPDOLERI";
 195:     sp = sstrs;
 196:     do {
 197:         *(*sp++) = tgetstr(namp, &aoftspace);
 198:         namp += 2;
 199:     } while (*namp);
 200: }
 201: 
 202: char *
 203: longname(bp, def)
 204:     register char *bp;
 205:     char *def;
 206: {
 207:     register char *cp;
 208: 
 209:     while (*bp && *bp != ':' && *bp != '|')
 210:         bp++;
 211:     if (*bp == '|') {
 212:         bp++;
 213:         cp = bp;
 214:         while (*cp && *cp != ':' && *cp != '|')
 215:             cp++;
 216:         *cp = 0;
 217:         return (bp);
 218:     }
 219:     return (def);
 220: }
 221: 
 222: char *
 223: fkey(i)
 224:     int i;
 225: {
 226:     if (0 <= i && i <= 9)
 227:         return(*fkeys[i]);
 228:     else
 229:         return(NOSTR);
 230: }
 231: 
 232: /*
 233:  * cost figures out how much (in characters) it costs to send the string
 234:  * str to the terminal.  It takes into account padding information, as
 235:  * much as it can, for a typical case.  (Right now the typical case assumes
 236:  * the number of lines affected is the size of the screen, since this is
 237:  * mainly used to decide if AL or SR is better, and this always happens
 238:  * at the top of the screen.  We assume cursor motion (CM) has little
 239:  * padding, if any, required, so that case, which is really more important
 240:  * than AL vs SR, won't be really affected.)
 241:  */
 242: static int costnum;
 243: cost(str)
 244: char *str;
 245: {
 246:     int countnum();
 247: 
 248:     if (str == NULL || *str=='O')   /* OOPS */
 249:         return 10000;   /* infinity */
 250:     costnum = 0;
 251:     tputs(str, LINES, countnum);
 252:     return costnum;
 253: }
 254: 
 255: /* ARGSUSED */
 256: countnum(ch)
 257: char ch;
 258: {
 259:     costnum++;
 260: }

Defined functions

Defined variables