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- /*
- * Code for dealing with paragraphs and filling. Adapted from MicroEMACS 3.6
- * and GNU-ified by mwm@ucbvax. Several bug fixes by blarson@usc-oberon.
- */
- #include "def.h"
-
- static int fillcol = 70 ;
- #define MAXWORD 256
-
- /*
- * go back to the begining of the current paragraph
- * here we look for a <NL><NL> or <NL><TAB> or <NL><SPACE>
- * combination to delimit the begining of a paragraph
- */
- /*ARGSUSED*/
- gotobop(f, n, k) {
- register int suc; /* success of last backchar */
-
- if (n < 0) /* the other way...*/
- return(gotoeop(f, -n, KRANDOM));
-
- while (n-- > 0) { /* for each one asked for */
-
- /* first scan back until we are in a word */
- suc = backchar(FALSE, 1, KRANDOM);
- while (!inword() && suc)
- suc = backchar(FALSE, 1, KRANDOM);
- curwp->w_doto = 0; /* and go to the B-O-Line */
-
- /* and scan back until we hit a <NL><SP> <NL><TAB> or <NL><NL> */
- while (lback(curwp->w_dotp) != curbp->b_linep)
- if (llength(lback(curwp->w_dotp))
- && lgetc(curwp->w_dotp,0) != ' '
- && lgetc(curwp->w_dotp,0) != '\t')
- curwp->w_dotp = lback(curwp->w_dotp);
- else
- break;
- }
- curwp->w_flag |= WFMOVE; /* force screen update */
- return TRUE;
- }
-
- /*
- * go forword to the end of the current paragraph
- * here we look for a <NL><NL> or <NL><TAB> or <NL><SPACE>
- * combination to delimit the begining of a paragraph
- */
- /*ARGSUSED*/
- gotoeop(f, n, k) {
- register int suc; /* success of last backchar */
-
- if (n < 0) /* the other way...*/
- return(gotobop(f, -n, KRANDOM));
-
- while (n-- > 0) { /* for each one asked for */
-
- /* Find the first word on/after the current line */
- curwp->w_doto = 0;
- suc = forwchar(FALSE, 1, KRANDOM);
- while (!inword() && suc)
- suc = forwchar(FALSE, 1, KRANDOM);
- curwp->w_doto = 0;
- if (curwp->w_dotp == curbp->b_linep)
- break; /* check for eob */
- curwp->w_dotp = lforw(curwp->w_dotp);
-
- /* and scan forword until we hit a <NL><SP> or ... */
- while (curwp->w_dotp != curbp->b_linep) {
- if (llength(curwp->w_dotp)
- && lgetc(curwp->w_dotp,0) != ' '
- && lgetc(curwp->w_dotp,0) != '\t')
- curwp->w_dotp = lforw(curwp->w_dotp);
- else
- break;
- }
- }
- curwp->w_flag |= WFMOVE; /* force screen update */
- return TRUE;
- }
-
- /*
- * Fill the current paragraph according to the current
- * fill column
- */
- /*ARGSUSED*/
- fillpara(f, n, k) {
- register int c; /* current char durring scan */
- register int wordlen; /* length of current word */
- register int clength; /* position on line during fill */
- register int i; /* index during word copy */
- register int eopflag; /* Are we at the End-Of-Paragraph? */
- int firstflag; /* first word? (needs no space) */
- int newlength; /* tentative new line length */
- int eolflag; /* was at end of line */
- LINE *eopline; /* pointer to line just past EOP */
- char wbuf[MAXWORD]; /* buffer for current word */
-
- /* record the pointer to the line just past the EOP */
- (VOID) gotoeop(FALSE, 1, KRANDOM);
- eopline = curwp->w_dotp;
-
- /* and back top the begining of the paragraph */
- (VOID) gotobop(FALSE, 1, KRANDOM);
-
- /* initialize various info */
- i = TRUE;
- while (i == TRUE && !inword())
- i = forwchar(FALSE, 1, KRANDOM);
- clength = curwp->w_doto;
- wordlen = 0;
-
- /* scan through lines, filling words */
- firstflag = TRUE;
- eopflag = FALSE;
- while (!eopflag) {
- /* get the next character in the paragraph */
- if (eolflag=(curwp->w_doto == llength(curwp->w_dotp))) {
- c = ' ';
- if (lforw(curwp->w_dotp) == eopline)
- eopflag = TRUE;
- } else
- c = lgetc(curwp->w_dotp, curwp->w_doto);
-
- /* and then delete it */
- if (ldelete((RSIZE) 1, KNONE) == FALSE) return FALSE ;
-
- /* if not a separator, just add it in */
- if (c != ' ' && c != '\t') {
- if (wordlen < MAXWORD - 1)
- wbuf[wordlen++] = c;
- else {
- /* You loose chars beyond MAXWORD if the word
- * is to long. I'm to lazy to fix it now; it
- * just silently truncated the word before, so
- * I get to feel smug.
- */
- ewprintf("Word too long!");
- }
- } else if (wordlen) {
- /* calculate tenatitive new length with word added */
- newlength = clength + 1 + wordlen;
- /* if at end of line or at doublespace and previous
- * character was one of '.','?','!' doublespace here.
- */
- if((eolflag || curwp->w_doto==llength(curwp->w_dotp)
- || (c=lgetc(curwp->w_dotp,curwp->w_doto))==' '
- || c=='\t')
- && ISEOSP(wbuf[wordlen-1])
- && wordlen<MAXWORD-1)
- wbuf[wordlen++] = ' ';
- /* at a word break with a word waiting */
- if (newlength <= fillcol) {
- /* add word to current line */
- if (!firstflag) {
- (VOID) linsert((RSIZE) 1, ' ');
- ++clength;
- }
- firstflag = FALSE;
- } else {
- if(curwp->w_doto > 0 &&
- lgetc(curwp->w_dotp,curwp->w_doto-1)==' ') {
- curwp->w_doto -= 1;
- (VOID) ldelete((RSIZE) 1, KNONE);
- }
- /* start a new line */
- (VOID) lnewline();
- clength = 0;
- }
-
- /* and add the word in in either case */
- for (i=0; i<wordlen; i++) {
- (VOID) linsert((RSIZE) 1, wbuf[i]);
- ++clength;
- }
- wordlen = 0;
- }
- }
- /* and add a last newline for the end of our new paragraph */
- (VOID) lnewline();
- /* we realy should wind up where we started, (which is hard to keep
- * track of) but I think the end of the last line is better than the
- * begining of the blank line. */
- (VOID) backchar(FALSE, 1, KRANDOM);
- return TRUE;
- }
-
- /* delete n paragraphs starting with the current one */
- /*ARGSUSED*/
- killpara(f, n, k) {
- register int status; /* returned status of functions */
-
- while (n--) { /* for each paragraph to delete */
-
- /* mark out the end and begining of the para to delete */
- (VOID) gotoeop(FALSE, 1, KRANDOM);
-
- /* set the mark here */
- curwp->w_markp = curwp->w_dotp;
- curwp->w_marko = curwp->w_doto;
-
- /* go to the begining of the paragraph */
- (VOID) gotobop(FALSE, 1, KRANDOM);
- curwp->w_doto = 0; /* force us to the begining of line */
-
- /* and delete it */
- if ((status = killregion(FALSE, 1, KRANDOM)) != TRUE)
- return(status);
-
- /* and clean up the 2 extra lines */
- (VOID) ldelete((RSIZE) 1, KFORW);
- }
- return(TRUE);
- }
-
- /*
- * check to see if we're past fillcol, and if so,
- * justify this line. As a last step, justify the line.
- */
- /*ARGSUSED*/
- fillword(f, n, k) {
- register char c;
- register int col, i, nce;
-
- for (i = col = 0; col <= fillcol; ++i, ++col) {
- if (i == curwp->w_doto) return selfinsert(f, n, k) ;
- c = lgetc(curwp->w_dotp, i);
- if (c == '\t') col |= 0x07;
- else if (ISCTRL(c) != FALSE) ++col;
- }
- if (curwp->w_doto != llength(curwp->w_dotp)) {
- (VOID) selfinsert(f, n, k);
- nce = llength(curwp->w_dotp) - curwp->w_doto;
- } else nce = 0;
- curwp->w_doto = i;
-
- if ((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' ' && c != '\t')
- do {
- (VOID) backchar(FALSE, 1, KRANDOM);
- } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' '
- && c != '\t' && curwp->w_doto > 0);
-
- if (curwp->w_doto == 0)
- do {
- (VOID) forwchar(FALSE, 1, KRANDOM);
- } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' '
- && c != '\t' && curwp->w_doto < llength(curwp->w_dotp));
-
- (VOID) delwhite(FALSE, 1, KRANDOM);
- (VOID) backdel(FALSE, 1, KRANDOM);
- (VOID) lnewline();
- curwp->w_doto = llength(curwp->w_dotp) - nce;
- curwp->w_flag |= WFMOVE;
- if (nce == 0 && curwp->w_doto != 0) return fillword(f, n, k);
- return TRUE;
- }
-
- /* Set fill column to n. */
- /*ARGSUSED*/
- setfillcol(f, n, k) {
- extern int getcolpos() ;
-
- fillcol = ((f == FALSE) ? getcolpos() : n);
- if (kbdmop == NULL) ewprintf("Fill column set to %d", fillcol);
- return(TRUE);
- }
-