4.3BSD - /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: #ifndef lint
   8: static char *sccsid = "@(#)ex_tty.c	7.10 (Berkeley) 6/7/85";
   9: #endif not lint
  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:     UPPERCASE = (tty.sg_flags & LCASE) != 0;
  32:     GT = (tty.sg_flags & XTABS) != XTABS && !XT;
  33:     NONL = (tty.sg_flags & CRMOD) == 0;
  34: #else
  35:     if (ioctl(1, TCGETA, &tty) < 0)
  36:         return;
  37:     if (ospeed != (tty.c_cflag & CBAUD))    /* mjm */
  38:         value(SLOWOPEN) = (tty.c_cflag & CBAUD) < B1200;
  39:     ospeed = tty.c_cflag & CBAUD;
  40:     normf = tty;
  41:     UPPERCASE = (tty.c_iflag & IUCLC) != 0;
  42:     GT = (tty.c_oflag & TABDLY) != TAB3 && !XT;
  43:     NONL = (tty.c_oflag & ONLCR) == 0;
  44: #endif
  45: }
  46: 
  47: char *xPC;
  48: char **sstrs[] = {
  49:     &AL, &BC, &BT, &CD, &CE, &CL, &CM, &xCR, &CS, &DC, &DL, &DM, &DO,
  50:     &ED, &EI, &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9,
  51:     &HO, &IC, &IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU, &LL, &ND, &xNL,
  52:     &xPC, &RC, &SC, &SE, &SF, &SO, &SR, &TA, &TE, &TI, &UP, &VB, &VS, &VE,
  53:     &AL_PARM, &DL_PARM, &UP_PARM, &DOWN_PARM, &LEFT_PARM, &RIGHT_PARM
  54: };
  55: bool *sflags[] = {
  56:     &AM, &BS, &DA, &DB, &EO, &HC, &HZ, &IN, &MI, &NC, &NS, &OS, &UL,
  57:     &XB, &XN, &XT, &XX
  58: };
  59: char **fkeys[10] = {
  60:     &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9
  61: };
  62: setterm(type)
  63:     char *type;
  64: {
  65:     char *tgoto();
  66:     register int unknown;
  67:     char ltcbuf[TCBUFSIZE];
  68: 
  69:     if (type[0] == 0)
  70:         type = "xx";
  71:     unknown = 0;
  72:     putpad(TE);
  73:     if (tgetent(ltcbuf, type) != 1) {
  74:         unknown++;
  75:         CP(ltcbuf, "xx|dumb:");
  76:     }
  77:     setsize();
  78:     aoftspace = tspace;
  79:     zap();
  80:     /*
  81: 	 * Initialize keypad arrow keys.
  82: 	 */
  83:     arrows[0].cap = KU; arrows[0].mapto = "k"; arrows[0].descr = "up";
  84:     arrows[1].cap = KD; arrows[1].mapto = "j"; arrows[1].descr = "down";
  85:     arrows[2].cap = KL; arrows[2].mapto = "h"; arrows[2].descr = "left";
  86:     arrows[3].cap = KR; arrows[3].mapto = "l"; arrows[3].descr = "right";
  87:     arrows[4].cap = KH; arrows[4].mapto = "H"; arrows[4].descr = "home";
  88: 
  89:     /*
  90: 	 * Handle funny termcap capabilities
  91: 	 */
  92:     if (CS && SC && RC) {
  93:         if (AL==NULL) AL="";
  94:         if (DL==NULL) DL="";
  95:     }
  96:     if (AL_PARM && AL==NULL) AL="";
  97:     if (DL_PARM && DL==NULL) DL="";
  98:     if (IC && IM==NULL) IM="";
  99:     if (IC && EI==NULL) EI="";
 100:     if (!GT) BT=NULL;   /* If we can't tab, we can't backtab either */
 101: 
 102: #ifdef TIOCLGET
 103:     /*
 104: 	 * Now map users susp char to ^Z, being careful that the susp
 105: 	 * overrides any arrow key, but only for hackers (=new tty driver).
 106: 	 */
 107:     {
 108:         static char sc[2];
 109:         int i, fnd;
 110: 
 111:         ioctl(0, TIOCGETD, &ldisc);
 112:         if (ldisc == NTTYDISC) {
 113:             sc[0] = olttyc.t_suspc;
 114:             sc[1] = 0;
 115:             if (olttyc.t_suspc == CTRL(z)) {
 116:                 for (i=0; i<=4; i++)
 117:                     if (arrows[i].cap &&
 118:                         arrows[i].cap[0] == CTRL(z))
 119:                         addmac(sc, NULL, NULL, arrows);
 120:             } else
 121:                 addmac(sc, "\32", "susp", arrows);
 122:         }
 123:     }
 124: #endif
 125: 
 126:     if (tgoto(CM, 2, 2)[0] == 'O')  /* OOPS */
 127:         CA = 0, CM = 0;
 128:     else
 129:         CA = 1, costCM = cost(tgoto(CM, 8, 10));
 130:     costSR = cost(SR);
 131:     costAL = cost(AL);
 132:     costDP = cost(tgoto(DOWN_PARM, 10, 10));
 133:     costLP = cost(tgoto(LEFT_PARM, 10, 10));
 134:     costRP = cost(tgoto(RIGHT_PARM, 10, 10));
 135:     PC = xPC ? xPC[0] : 0;
 136:     aoftspace = tspace;
 137:     CP(ttytype, longname(ltcbuf, type));
 138:     /* proper strings to change tty type */
 139:     termreset();
 140:     gettmode();
 141:     value(REDRAW) = AL && DL;
 142:     value(OPTIMIZE) = !CA && !GT;
 143:     if (ospeed == B1200 && !value(REDRAW))
 144:         value(SLOWOPEN) = 1;    /* see also gettmode above */
 145:     if (unknown)
 146:         serror("%s: Unknown terminal type", type);
 147: }
 148: 
 149: setsize()
 150: {
 151:     register int l, i;
 152:     struct winsize win;
 153: 
 154:     if (ioctl(0, TIOCGWINSZ, &win) < 0) {
 155:         i = LINES = tgetnum("li");
 156:         COLUMNS = tgetnum("co");
 157:     } else {
 158:         if ((LINES = winsz.ws_row = win.ws_row) == 0)
 159:             LINES = tgetnum("li");
 160:         i = LINES;
 161:         if ((COLUMNS = winsz.ws_col = win.ws_col) == 0)
 162:             COLUMNS = tgetnum("co");
 163:     }
 164:     if (LINES <= 5)
 165:         LINES = 24;
 166:     if (LINES > TUBELINES)
 167:         LINES = TUBELINES;
 168:     l = LINES;
 169:     if (ospeed < B1200)
 170:         l = 9;  /* including the message line at the bottom */
 171:     else if (ospeed < B2400)
 172:         l = 17;
 173:     if (l > LINES)
 174:         l = LINES;
 175:     if (COLUMNS <= 4)
 176:         COLUMNS = 1000;
 177:     options[WINDOW].ovalue = options[WINDOW].odefault = l - 1;
 178:     if (defwind) options[WINDOW].ovalue = defwind;
 179:     options[SCROLL].ovalue = options[SCROLL].odefault = HC ? 11 : ((l-1) / 2);
 180:     if (i <= 0)
 181:         LINES = 2;
 182: }
 183: 
 184: zap()
 185: {
 186:     register char *namp;
 187:     register bool **fp;
 188:     register char ***sp;
 189: 
 190:     namp = "ambsdadbeohchzinmincnsosulxbxnxtxx";
 191:     fp = sflags;
 192:     do {
 193:         *(*fp++) = tgetflag(namp);
 194:         namp += 2;
 195:     } while (*namp);
 196:     namp = "albcbtcdceclcmcrcsdcdldmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullndnlpcrcscsesfsosrtatetiupvbvsveALDLUPDOLERI";
 197:     sp = sstrs;
 198:     do {
 199:         *(*sp++) = tgetstr(namp, &aoftspace);
 200:         namp += 2;
 201:     } while (*namp);
 202: }
 203: 
 204: char *
 205: longname(bp, def)
 206:     register char *bp;
 207:     char *def;
 208: {
 209:     register char *cp;
 210: 
 211:     while (*bp && *bp != ':' && *bp != '|')
 212:         bp++;
 213:     if (*bp == '|') {
 214:         bp++;
 215:         cp = bp;
 216:         while (*cp && *cp != ':' && *cp != '|')
 217:             cp++;
 218:         *cp = 0;
 219:         return (bp);
 220:     }
 221:     return (def);
 222: }
 223: 
 224: char *
 225: fkey(i)
 226:     int i;
 227: {
 228:     if (0 <= i && i <= 9)
 229:         return(*fkeys[i]);
 230:     else
 231:         return(NOSTR);
 232: }
 233: 
 234: /*
 235:  * cost figures out how much (in characters) it costs to send the string
 236:  * str to the terminal.  It takes into account padding information, as
 237:  * much as it can, for a typical case.  (Right now the typical case assumes
 238:  * the number of lines affected is the size of the screen, since this is
 239:  * mainly used to decide if AL or SR is better, and this always happens
 240:  * at the top of the screen.  We assume cursor motion (CM) has little
 241:  * padding, if any, required, so that case, which is really more important
 242:  * than AL vs SR, won't be really affected.)
 243:  */
 244: static int costnum;
 245: cost(str)
 246: char *str;
 247: {
 248:     int countnum();
 249: 
 250:     if (str == NULL || *str=='O')   /* OOPS */
 251:         return 10000;   /* infinity */
 252:     costnum = 0;
 253:     tputs(str, LINES, countnum);
 254:     return costnum;
 255: }
 256: 
 257: /* ARGSUSED */
 258: countnum(ch)
 259: char ch;
 260: {
 261:     costnum++;
 262: }

Defined functions

Defined variables