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/* Help functions for MicroGnuEmacs 2 */
#include "def.h"
#ifndef NO_HELP
#include "kbd.h"
#include "key.h"
#ifndef NO_MACRO
#include "macro.h"
#endif
extern int rescan();
/*
* Read a key from the keyboard, and look it
* up in the keymap. Display the name of the function
* currently bound to the key.
*/
/*ARGSUSED*/
desckey(f, n)
{
register KEYMAP *curmap;
register PF funct;
register char *pep;
char prompt[80];
int c;
int m;
int i;
#ifndef NO_MACRO
if(inmacro) return TRUE; /* ignore inside keyboard macro */
#endif
(VOID) strcpy(prompt, "Describe key briefly: ");
pep = prompt + strlen(prompt);
key.k_count = 0;
m = curbp->b_nmodes;
curmap = curbp->b_modes[m]->p_map;
for(;;) {
for(;;) {
ewprintf("%s", prompt);
pep[-1] = ' ';
pep = keyname(pep, key.k_chars[key.k_count++] = c = getkey(FALSE));
if((funct = doscan(curmap, c)) != prefix) break;
*pep++ = '-';
*pep = '\0';
curmap = ele->k_prefmap;
}
if(funct != rescan) break;
if(ISUPPER(key.k_chars[key.k_count-1])) {
funct = doscan(curmap, TOLOWER(key.k_chars[key.k_count-1]));
if(funct == prefix) {
*pep++ = '-';
*pep = '\0';
curmap = ele->k_prefmap;
continue;
}
if(funct != rescan) break;
}
nextmode:
if(--m < 0) break;
curmap = curbp->b_modes[m]->p_map;
for(i=0; i < key.k_count; i++) {
funct = doscan(curmap, key.k_chars[i]);
if(funct != prefix) {
if(i == key.k_count - 1 && funct != rescan) goto found;
funct = rescan;
goto nextmode;
}
curmap = ele->k_prefmap;
}
*pep++ = '-';
*pep = '\0';
}
found:
if(funct == rescan) ewprintf("%k is not bound to any function");
else if((pep = function_name(funct)) != NULL)
ewprintf("%k runs the command %s", pep);
else ewprintf("%k is bound to an unnamed function");
return TRUE;
}
/*
* This function creates a table, listing all
* of the command keys and their current bindings, and stores
* the table in the *help* pop-up buffer. This
* lets MicroGnuEMACS produce it's own wall chart.
*/
static BUFFER *bp;
static char buf[80]; /* used by showall and findbind */
/*ARGSUSED*/
wallchart(f, n)
{
int m;
static char locbind[80] = "Local keybindings for mode ";
static int showall();
bp = bfind("*help*", TRUE);
if (bclear(bp) != TRUE) return FALSE; /* Clear it out. */
for(m=curbp->b_nmodes; m > 0; m--) {
(VOID) strcpy(&locbind[27], curbp->b_modes[m]->p_name);
(VOID) strcat(&locbind[27], ":");
if((addline(bp, locbind) == FALSE) ||
(showall(buf, curbp->b_modes[m]->p_map) == FALSE) ||
(addline(bp, "") == FALSE)) return FALSE;
}
if((addline(bp, "Global bindings:") == FALSE) ||
(showall(buf, map_table[0].p_map) == FALSE)) return FALSE;
return popbuftop(bp);
}
static int showall(ind, map)
char *ind;
KEYMAP *map;
{
register MAP_ELEMENT *ele;
register int i;
PF functp;
char *cp;
char *cp2;
int last;
if(addline(bp, "") == FALSE) return FALSE;
last = -1;
for(ele = &map->map_element[0]; ele < &map->map_element[map->map_num] ; ele++) {
if(map->map_default != rescan && ++last < ele->k_base) {
cp = keyname(ind, last);
if(last < ele->k_base - 1) {
(VOID) strcpy(cp, " .. ");
cp = keyname(cp + 4, ele->k_base - 1);
}
do { *cp++ = ' '; } while(cp < &buf[16]);
(VOID) strcpy(cp, function_name(map->map_default));
if(addline(bp, buf) == FALSE) return FALSE;
}
last = ele->k_num;
for(i=ele->k_base; i <= last; i++) {
functp = ele->k_funcp[i - ele->k_base];
if(functp != rescan) {
if(functp != prefix) cp2 = function_name(functp);
else cp2 = map_name(ele->k_prefmap);
if(cp2 != NULL) {
cp = keyname(ind, i);
do { *cp++ = ' '; } while(cp < &buf[16]);
(VOID) strcpy(cp, cp2);
if (addline(bp, buf) == FALSE) return FALSE;
}
}
}
}
for(ele = &map->map_element[0]; ele < &map->map_element[map->map_num]; ele++) {
if(ele->k_prefmap != NULL) {
for(i = ele->k_base; ele->k_funcp[i - ele->k_base] != prefix; i++) {
if(i >= ele->k_num) /* damaged map */
return FALSE;
}
cp = keyname(ind, i);
*cp++ = ' ';
if(showall(cp, ele->k_prefmap) == FALSE) return FALSE;
}
}
return TRUE;
}
help_help(f, n)
int f, n;
{
KEYMAP *kp;
PF funct;
if((kp = name_map("help")) == NULL) return FALSE;
ewprintf("a b c: ");
do {
funct = doscan(kp, getkey(FALSE));
} while(funct==NULL || funct==help_help);
#ifndef NO_MACRO
if(macrodef && macrocount < MAXMACRO) macro[macrocount-1].m_funct = funct;
#endif
return (*funct)(f, n);
}
static char buf2[128];
static char *buf2p;
/*ARGSUSED*/
apropos_command(f, n)
int f, n;
{
register char *cp1, *cp2;
char string[32];
FUNCTNAMES *fnp;
BUFFER *bp;
static VOID findbind();
if(eread("apropos: ", string, sizeof(string), EFNEW) == ABORT) return ABORT;
/* FALSE means we got a 0 character string, which is fine */
bp = bfind("*help*", TRUE);
if(bclear(bp) == FALSE) return FALSE;
for(fnp = &functnames[0]; fnp < &functnames[nfunct]; fnp++) {
for(cp1 = fnp->n_name; *cp1; cp1++) {
cp2 = string;
while(*cp2 && *cp1 == *cp2)
cp1++, cp2++;
if(!*cp2) {
(VOID) strcpy(buf2, fnp->n_name);
buf2p = &buf2[strlen(buf2)];
findbind(fnp->n_funct, buf, map_table[0].p_map);
if(addline(bp, buf2) == FALSE) return FALSE;
break;
} else cp1 -= cp2 - string;
}
}
return popbuftop(bp);
}
static VOID findbind(funct, ind, map)
PF funct;
char *ind;
KEYMAP *map;
{
register MAP_ELEMENT *ele;
register int i;
char *cp;
int last;
static VOID bindfound();
last = -1;
for(ele = &map->map_element[0]; ele < &map->map_element[map->map_num]; ele++) {
if(map->map_default == funct && ++last < ele->k_base) {
cp = keyname(ind, last);
if(last < ele->k_base - 1) {
(VOID) strcpy(cp, " .. ");
(VOID) keyname(cp + 4, ele->k_base - 1);
}
bindfound();
}
last = ele->k_num;
for(i=ele->k_base; i <= last; i++) {
if(funct == ele->k_funcp[i - ele->k_base]) {
if(funct == prefix) {
cp = map_name(ele->k_prefmap);
if(!cp || strncmp(cp, buf2, strlen(cp)) != 0) continue;
}
(VOID) keyname(ind, i);
bindfound();
}
}
}
for(ele = &map->map_element[0]; ele < &map->map_element[map->map_num]; ele++) {
if(ele->k_prefmap != NULL) {
for(i = ele->k_base; ele->k_funcp[i - ele->k_base] != prefix; i++) {
if(i >= ele->k_num) return; /* damaged */
}
cp = keyname(ind, i);
*cp++ = ' ';
findbind(funct, cp, ele->k_prefmap);
}
}
}
static VOID bindfound() {
if(buf2p < &buf2[32]) {
do { *buf2p++ = ' '; } while(buf2p < &buf2[32]);
} else {
*buf2p++ = ',';
*buf2p++ = ' ';
}
(VOID) strcpy(buf2p, buf);
buf2p += strlen(buf);
}
#endif
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