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1.1 root 1: /* Copyright (c) 1981 Regents of the University of California */
2: static char *sccsid = "@(#)ex_tty.c 7.6 6/10/83";
3: #include "ex.h"
4: #include "ex_tty.h"
5:
6: /*
7: * Terminal type initialization routines,
8: * and calculation of flags at entry or after
9: * a shell escape which may change them.
10: */
11: /* short ospeed = -1; mjm: def also in tputs.c of termcap.a */
12:
13: gettmode()
14: {
15:
16: #ifndef USG3TTY
17: if (gtty(1, &tty) < 0)
18: return;
19: if (ospeed != tty.sg_ospeed)
20: value(SLOWOPEN) = tty.sg_ospeed < B1200;
21: ospeed = tty.sg_ospeed;
22: normf = tty.sg_flags;
23: UPPERCASE = (tty.sg_flags & LCASE) != 0;
24: GT = (tty.sg_flags & XTABS) != XTABS && !XT;
25: NONL = (tty.sg_flags & CRMOD) == 0;
26: #else
27: if (ioctl(1, TCGETA, &tty) < 0)
28: return;
29: if (ospeed != (tty.c_cflag & CBAUD)) /* mjm */
30: value(SLOWOPEN) = (tty.c_cflag & CBAUD) < B1200;
31: ospeed = tty.c_cflag & CBAUD;
32: normf = tty;
33: UPPERCASE = (tty.c_iflag & IUCLC) != 0;
34: GT = (tty.c_oflag & TABDLY) != TAB3 && !XT;
35: NONL = (tty.c_oflag & ONLCR) == 0;
36: #endif
37: }
38:
39: char *xPC;
40: char **sstrs[] = {
41: &AL, &BC, &BT, &CD, &CE, &CL, &CM, &xCR, &CS, &DC, &DL, &DM, &DO,
42: &ED, &EI, &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9,
43: &HO, &IC, &IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU, &LL, &ND, &xNL,
44: &xPC, &RC, &SC, &SE, &SF, &SO, &SR, &TA, &TE, &TI, &UP, &VB, &VS, &VE,
45: &AL_PARM, &DL_PARM, &UP_PARM, &DOWN_PARM, &LEFT_PARM, &RIGHT_PARM
46: };
47: bool *sflags[] = {
48: &AM, &BS, &DA, &DB, &EO, &HC, &HZ, &IN, &MI, &NC, &NS, &OS, &UL,
49: &XB, &XN, &XT, &XX
50: };
51: char **fkeys[10] = {
52: &F0, &F1, &F2, &F3, &F4, &F5, &F6, &F7, &F8, &F9
53: };
54: setterm(type)
55: char *type;
56: {
57: char *tgoto();
58: register int unknown, i;
59: register int l;
60: char ltcbuf[TCBUFSIZE];
61:
62: if (type[0] == 0)
63: type = "xx";
64: unknown = 0;
65: putpad(TE);
66: if (tgetent(ltcbuf, type) != 1) {
67: unknown++;
68: CP(ltcbuf, "xx|dumb:");
69: }
70: i = LINES = tgetnum("li");
71: if (LINES <= 5)
72: LINES = 24;
73: if (LINES > TUBELINES)
74: LINES = TUBELINES;
75: l = LINES;
76: if (ospeed < B1200)
77: l = 9; /* including the message line at the bottom */
78: else if (ospeed < B2400)
79: l = 17;
80: if (l > LINES)
81: l = LINES;
82: aoftspace = tspace;
83: zap();
84: /*
85: * Initialize keypad arrow keys.
86: */
87: arrows[0].cap = KU; arrows[0].mapto = "k"; arrows[0].descr = "up";
88: arrows[1].cap = KD; arrows[1].mapto = "j"; arrows[1].descr = "down";
89: arrows[2].cap = KL; arrows[2].mapto = "h"; arrows[2].descr = "left";
90: arrows[3].cap = KR; arrows[3].mapto = "l"; arrows[3].descr = "right";
91: arrows[4].cap = KH; arrows[4].mapto = "H"; arrows[4].descr = "home";
92:
93: /*
94: * Handle funny termcap capabilities
95: */
96: if (CS && SC && RC) AL=DL="";
97: if (AL_PARM && AL==NULL) AL="";
98: if (DL_PARM && DL==NULL) DL="";
99: if (IC && IM==NULL) IM="";
100: if (IC && EI==NULL) EI="";
101: if (!GT) BT=NULL; /* If we can't tab, we can't backtab either */
102:
103: #ifdef TIOCLGET
104: /*
105: * Now map users susp char to ^Z, being careful that the susp
106: * overrides any arrow key, but only for hackers (=new tty driver).
107: */
108: {
109: static char sc[2];
110: int i, fnd;
111:
112: ioctl(0, TIOCGETD, &ldisc);
113: if (ldisc == NTTYDISC) {
114: sc[0] = olttyc.t_suspc;
115: sc[1] = 0;
116: if (olttyc.t_suspc == CTRL(z)) {
117: for (i=0; i<=4; i++)
118: if (arrows[i].cap &&
119: arrows[i].cap[0] == CTRL(z))
120: addmac(sc, NULL, NULL, arrows);
121: } else
122: addmac(sc, "\32", "susp", arrows);
123: }
124: }
125: #endif
126:
127: options[WINDOW].ovalue = options[WINDOW].odefault = l - 1;
128: if (defwind) options[WINDOW].ovalue = defwind;
129: options[SCROLL].ovalue = options[SCROLL].odefault = HC ? 11 : ((l-1) / 2);
130: COLUMNS = tgetnum("co");
131: if (COLUMNS <= 4)
132: COLUMNS = 1000;
133: if (tgoto(CM, 2, 2)[0] == 'O') /* OOPS */
134: CA = 0, CM = 0;
135: else
136: CA = 1, costCM = cost(tgoto(CM, 8, 10));
137: costSR = cost(SR);
138: costAL = cost(AL);
139: costDP = cost(tgoto(DOWN_PARM, 10, 10));
140: costLP = cost(tgoto(LEFT_PARM, 10, 10));
141: costRP = cost(tgoto(RIGHT_PARM, 10, 10));
142: PC = xPC ? xPC[0] : 0;
143: aoftspace = tspace;
144: CP(ttytype, longname(ltcbuf, type));
145: if (i <= 0)
146: LINES = 2;
147: /* proper strings to change tty type */
148: termreset();
149: gettmode();
150: value(REDRAW) = AL && DL;
151: value(OPTIMIZE) = !CA && !GT;
152: if (ospeed == B1200 && !value(REDRAW))
153: value(SLOWOPEN) = 1; /* see also gettmode above */
154: if (unknown)
155: serror("%s: Unknown terminal type", type);
156: }
157:
158: zap()
159: {
160: register char *namp;
161: register bool **fp;
162: register char ***sp;
163:
164: namp = "ambsdadbeohchzinmincnsosulxbxnxtxx";
165: fp = sflags;
166: do {
167: *(*fp++) = tgetflag(namp);
168: namp += 2;
169: } while (*namp);
170: namp = "albcbtcdceclcmcrcsdcdldmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullndnlpcrcscsesfsosrtatetiupvbvsveALDLUPDOLERI";
171: sp = sstrs;
172: do {
173: *(*sp++) = tgetstr(namp, &aoftspace);
174: namp += 2;
175: } while (*namp);
176: }
177:
178: char *
179: longname(bp, def)
180: register char *bp;
181: char *def;
182: {
183: register char *cp;
184:
185: while (*bp && *bp != ':' && *bp != '|')
186: bp++;
187: if (*bp == '|') {
188: bp++;
189: cp = bp;
190: while (*cp && *cp != ':' && *cp != '|')
191: cp++;
192: *cp = 0;
193: return (bp);
194: }
195: return (def);
196: }
197:
198: char *
199: fkey(i)
200: int i;
201: {
202: if (0 <= i && i <= 9)
203: return(*fkeys[i]);
204: else
205: return(NOSTR);
206: }
207:
208: /*
209: * cost figures out how much (in characters) it costs to send the string
210: * str to the terminal. It takes into account padding information, as
211: * much as it can, for a typical case. (Right now the typical case assumes
212: * the number of lines affected is the size of the screen, since this is
213: * mainly used to decide if AL or SR is better, and this always happens
214: * at the top of the screen. We assume cursor motion (CM) has little
215: * padding, if any, required, so that case, which is really more important
216: * than AL vs SR, won't be really affected.)
217: */
218: static int costnum;
219: cost(str)
220: char *str;
221: {
222: int countnum();
223:
224: if (str == NULL || *str=='O') /* OOPS */
225: return 10000; /* infinity */
226: costnum = 0;
227: tputs(str, LINES, countnum);
228: return costnum;
229: }
230:
231: /* ARGSUSED */
232: countnum(ch)
233: char ch;
234: {
235: costnum++;
236: }
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