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- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
- /* topl.c - version 1.0.2 */
-
- #include <stdio.h>
- #include "hack.h"
- extern char *eos();
- extern int CO;
-
- char toplines[BUFSZ];
- xchar tlx, tly; /* set by pline; used by addtopl */
-
- struct topl {
- struct topl *next_topl;
- char *topl_text;
- } *old_toplines, *last_redone_topl;
- #define OTLMAX 20 /* max nr of old toplines remembered */
-
- doredotopl(){
- if(last_redone_topl)
- last_redone_topl = last_redone_topl->next_topl;
- if(!last_redone_topl)
- last_redone_topl = old_toplines;
- if(last_redone_topl){
- (void) strcpy(toplines, last_redone_topl->topl_text);
- }
- redotoplin();
- return(0);
- }
-
- redotoplin() {
- home();
- if(index(toplines, '\n')) cl_end();
- putstr(toplines);
- cl_end();
- tlx = curx;
- tly = cury;
- flags.toplin = 1;
- if(tly > 1)
- more();
- }
-
- remember_topl() {
- register struct topl *tl;
- register int cnt = OTLMAX;
- if(last_redone_topl &&
- !strcmp(toplines, last_redone_topl->topl_text)) return;
- if(old_toplines &&
- !strcmp(toplines, old_toplines->topl_text)) return;
- last_redone_topl = 0;
- tl = (struct topl *)
- alloc((unsigned)(strlen(toplines) + sizeof(struct topl) + 1));
- tl->next_topl = old_toplines;
- tl->topl_text = (char *)(tl + 1);
- (void) strcpy(tl->topl_text, toplines);
- old_toplines = tl;
- while(cnt && tl){
- cnt--;
- tl = tl->next_topl;
- }
- if(tl && tl->next_topl){
- free((char *) tl->next_topl);
- tl->next_topl = 0;
- }
- }
-
- addtopl(s) char *s; {
- curs(tlx,tly);
- if(tlx + strlen(s) > CO) putsym('\n');
- putstr(s);
- tlx = curx;
- tly = cury;
- flags.toplin = 1;
- }
-
- xmore(s)
- char *s; /* allowed chars besides space/return */
- {
- if(flags.toplin) {
- curs(tlx, tly);
- if(tlx + 8 > CO) putsym('\n'), tly++;
- }
-
- if(flags.standout)
- standoutbeg();
- putstr("--More--");
- if(flags.standout)
- standoutend();
-
- xwaitforspace(s);
- if(flags.toplin && tly > 1) {
- home();
- cl_end();
- docorner(1, tly-1);
- }
- flags.toplin = 0;
- }
-
- more(){
- xmore("");
- }
-
- cmore(s)
- register char *s;
- {
- xmore(s);
- }
-
- clrlin(){
- if(flags.toplin) {
- home();
- cl_end();
- if(tly > 1) docorner(1, tly-1);
- remember_topl();
- }
- flags.toplin = 0;
- }
-
- /*VARARGS1*/
- pline(line,arg1,arg2,arg3,arg4,arg5,arg6)
- /*register*/ char *line,*arg1,*arg2,*arg3,*arg4,*arg5,*arg6;
- {
- char pbuf[BUFSZ];
- register char *bp = pbuf, *tl;
- register int n,n0;
-
- if(!line || !*line) return;
- if(!index(line, '%')) (void) strcpy(pbuf,line); else
- (void) sprintf(pbuf,line,arg1,arg2,arg3,arg4,arg5,arg6);
- if(flags.toplin == 1 && !strcmp(pbuf, toplines)) return;
- nscr(); /* %% */
-
- /* If there is room on the line, print message on same line */
- /* But messages like "You die..." deserve their own line */
- n0 = strlen(bp);
- if(flags.toplin == 1 && tly == 1 &&
- n0 + strlen(toplines) + 3 < CO-8 && /* leave room for --More-- */
- strncmp(bp, "You ", 4)) {
- (void) strcat(toplines, " ");
- (void) strcat(toplines, bp);
- tlx += 2;
- addtopl(bp);
- return;
- }
- if(flags.toplin == 1) more();
- remember_topl();
- toplines[0] = 0;
- while(n0){
- if(n0 >= CO){
- /* look for appropriate cut point */
- n0 = 0;
- for(n = 0; n < CO; n++) if(bp[n] == ' ')
- n0 = n;
- if(!n0) for(n = 0; n < CO-1; n++)
- if(!letter(bp[n])) n0 = n;
- if(!n0) n0 = CO-2;
- }
- (void) strncpy((tl = eos(toplines)), bp, n0);
- tl[n0] = 0;
- bp += n0;
-
- /* remove trailing spaces, but leave one */
- while(n0 > 1 && tl[n0-1] == ' ' && tl[n0-2] == ' ')
- tl[--n0] = 0;
-
- n0 = strlen(bp);
- if(n0 && tl[0]) (void) strcat(tl, "\n");
- }
- redotoplin();
- }
-
- putsym(c) char c; {
- switch(c) {
- case '\b':
- backsp();
- return;
- case '\n':
- curx = 1;
- cury++;
- if(cury > tly) tly = cury;
- break;
- default:
- if(curx == CO)
- putsym('\n'); /* 1 <= curx <= CO; avoid CO */
- else
- curx++;
- }
- (void) putchar(c);
- }
-
- putstr(s) register char *s; {
- while(*s) putsym(*s++);
- }
-