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ttykbd.c
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C/C++ Source or Header
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1992-05-06
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4KB
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173 lines
/*
* Name: MicroEMACS
* Digital ANSI terminal keyboard.
* Assumes LK201, which is OK on the VT100.
* Version: 29
* Last edit: 05-Feb-86
* By: rex::conroy
* decvax!decwrl!dec-rhea!dec-rex!conroy
*/
#include "def.h"
#define ESC 0x1B /* Escape, arrows et al. */
#define AGRAVE 0x60 /* LK201 kludge. */
/*
* The special keys on an LK201 send back
* escape sequences of the general form <ESC>[nnn~, where
* nnn is a key code number. This table is indexed by the
* nnn code to get the key code, which is used in the
* binding table. The F4 key, and the F6 through F14 keys
* have key codes. Also F17 through F20. Think of
* help and do as special.
*/
short lk201map[] = {
KRANDOM, KFIND, KINSERT, KREMOVE,
KSELECT, KPREV, KNEXT, KRANDOM,
KRANDOM, KRANDOM, KRANDOM, KRANDOM,
KRANDOM, KRANDOM, KF4, KRANDOM,
KRANDOM, KF6, KF7, KF8,
KF9, KF10, KRANDOM, KF11,
KF12, KF13, KF14, KRANDOM,
KHELP, KDO, KRANDOM, KF17,
KF18, KF19, KF20
};
/*
* Names for the keys with basic keycode
* between KFIRST and KLAST (inclusive). This is used by
* the key name routine in "kbd.c".
*/
char *keystrings[] = {
NULL, "Up", "Down", "Left",
"Right", "Find", "Insert", "Remove",
"Select", "Previous", "Next", "F4",
"F6", "F7", "F8", "F9",
"F10", "F11", "F12", "F13",
"F14", "Help", "Do", "F17",
"F18", "F19", "F20", "PF1",
"PF2", "PF3", "PF4", NULL
};
/*
* Read in a key, doing the low level mapping
* of ASCII code to 11 bit code. This level deals with
* mapping the special keys into their spots in the C1
* control area. The C0 controls go right through, and
* get remapped by "getkey".
*/
getkbd()
{
register int c;
register int n;
loop:
c = ttgetc();
if (c == AGRAVE) /* On LK201, grave is */
c = METACH; /* also META. */
if (c == ESC) {
c = ttgetc();
if (c == '[') {
c = ttgetc();
if (c == 'A')
return (KUP);
if (c == 'B')
return (KDOWN);
if (c == 'C')
return (KRIGHT);
if (c == 'D')
return (KLEFT);
if (c>='0' && c<='9') { /* LK201 functions. */
n = 0;
do {
n = 10*n + c - '0';
c = ttgetc();
} while (c>='0' && c<='9');
if (c=='~' && n<=34) {
c = lk201map[n];
if (c != KRANDOM)
return (c);
goto loop;
}
}
goto loop;
}
if (c == 'O') {
c = ttgetc();
if (c == 'A')
return (KUP);
if (c == 'B')
return (KDOWN);
if (c == 'C')
return (KRIGHT);
if (c == 'D')
return (KLEFT);
if (c == 'P')
return (KPF1);
if (c == 'Q')
return (KPF2);
if (c == 'R')
return (KPF3);
if (c == 'S')
return (KPF4);
goto loop;
}
if (ISLOWER(c) != FALSE) /* Copy the standard */
c = TOUPPER(c); /* META code. */
if (c>=0x00 && c<=0x1F)
c = KCTRL | (c+'@');
return (KMETA | c);
}
return (c);
}
/*
* Terminal specific keymap initialization.
* Attach the special keys to the appropriate built
* in functions. Bind all of the assigned graphics in the
* DEC supplimental character set to "ins-self".
* As is the case of all the keymap routines, errors
* are very fatal.
*/
ttykeymapinit()
{
register SYMBOL *sp;
register int i;
keydup(KFIND, "search-again");
keydup(KHELP, "help");
keydup(KINSERT, "yank");
keydup(KREMOVE, "kill-region");
keydup(KSELECT, "set-mark");
keydup(KPREV, "back-page");
keydup(KNEXT, "forw-page");
keydup(KDO, "execute-macro");
keydup(KF17, "back-window");
keydup(KF18, "forw-window");
keydup(KF19, "enlarge-window");
keydup(KF20, "shrink-window");
keydup(KUP, "back-line");
keydup(KDOWN, "forw-line");
keydup(KRIGHT, "forw-char");
keydup(KLEFT, "back-char");
/*
* Bind all GR positions that correspond
* to assigned characters in the Digital multinational
* character set to "ins-self". These characters may
* be used just like any other character.
*/
if ((sp=symlookup("ins-self")) == NULL)
abort();
for (i=0xA0; i<0xFF; ++i) {
if (i!=0xA4 && i!=0xA6 && i!=0xAC && i!=0xAD && i!=0xAE
&& i!=0xAF && i!=0xB4 && i!=0xB8 && i!=0xBE && i!=0xF0
&& i!=0xFE && i!=0xA0) {
if (binding[i] != NULL)
abort();
binding[i] = sp;
++sp->s_nkey;
}
}
}