home *** CD-ROM | disk | FTP | other *** search
- /* 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 ";
- 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;
- 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;
- 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(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
-