+++ /dev/null
-/* $OpenBSD: paragraph.c,v 1.22 2011/11/29 05:59:54 lum Exp $ */
-
-/* This file is in the public domain. */
-
-/*
- * 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
-
-/*
- * Move to start of paragraph. Go back to the beginning of the current
- * paragraph here we look for a <NL><NL> or <NL><TAB> or <NL><SPACE>
- * combination to delimit the beginning of a paragraph.
- */
-/* ARGSUSED */
-int
-gotobop(int f, int n)
-{
- /* the other way... */
- if (n < 0)
- return (gotoeop(f, -n));
-
- while (n-- > 0) {
- /* first scan back until we are in a word */
- while (backchar(FFRAND, 1) && inword() == 0);
-
- /* and go to the B-O-Line */
- curwp->w_doto = 0;
-
- /*
- * and scan back until we hit a <NL><SP> <NL><TAB> or
- * <NL><NL>
- */
- while (lback(curwp->w_dotp) != curbp->b_headp)
- if (llength(lback(curwp->w_dotp)) &&
- lgetc(curwp->w_dotp, 0) != ' ' &&
- lgetc(curwp->w_dotp, 0) != '.' &&
- lgetc(curwp->w_dotp, 0) != '\t')
- curwp->w_dotp = lback(curwp->w_dotp);
- else {
- if (llength(lback(curwp->w_dotp)) &&
- lgetc(curwp->w_dotp, 0) == '.') {
- curwp->w_dotp = lforw(curwp->w_dotp);
- if (curwp->w_dotp == curbp->b_headp) {
- /*
- * beyond end of buffer,
- * cleanup time
- */
- curwp->w_dotp =
- lback(curwp->w_dotp);
- curwp->w_doto =
- llength(curwp->w_dotp);
- }
- }
- break;
- }
- }
- /* force screen update */
- curwp->w_rflag |= WFMOVE;
- return (TRUE);
-}
-
-/*
- * Move to end of paragraph. Go forward to the end of the current paragraph
- * here we look for a <NL><NL> or <NL><TAB> or <NL><SPACE> combination to
- * delimit the beginning of a paragraph.
- */
-/* ARGSUSED */
-int
-gotoeop(int f, int n)
-{
- /* the other way... */
- if (n < 0)
- return (gotobop(f, -n));
-
- /* for each one asked for */
- while (n-- > 0) {
- /* Find the first word on/after the current line */
- curwp->w_doto = 0;
- while (forwchar(FFRAND, 1) && inword() == 0);
-
- curwp->w_doto = 0;
- curwp->w_dotp = lforw(curwp->w_dotp);
-
- /* and scan forword until we hit a <NL><SP> or ... */
- while (curwp->w_dotp != curbp->b_headp) {
- if (llength(curwp->w_dotp) &&
- lgetc(curwp->w_dotp, 0) != ' ' &&
- lgetc(curwp->w_dotp, 0) != '.' &&
- lgetc(curwp->w_dotp, 0) != '\t')
- curwp->w_dotp = lforw(curwp->w_dotp);
- else
- break;
- }
- if (curwp->w_dotp == curbp->b_headp) {
- /* beyond end of buffer, cleanup time */
- curwp->w_dotp = lback(curwp->w_dotp);
- curwp->w_doto = llength(curwp->w_dotp);
- break;
- }
- }
- /* force screen update */
- curwp->w_rflag |= WFMOVE;
- return (TRUE);
-}
-
-/*
- * Justify a paragraph. Fill the current paragraph according to the current
- * fill column.
- */
-/* ARGSUSED */
-int
-fillpara(int f, int n)
-{
- int c; /* current char during scan */
- int wordlen; /* length of current word */
- int clength; /* position on line during fill */
- int i; /* index during word copy */
- 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 */
- int retval; /* return value */
- struct line *eopline; /* pointer to line just past EOP */
- char wbuf[MAXWORD]; /* buffer for current word */
-
- undo_boundary_enable(FFRAND, 0);
-
- /* record the pointer to the line just past the EOP */
- (void)gotoeop(FFRAND, 1);
- if (curwp->w_doto != 0) {
- /* paragraph ends at end of buffer */
- (void)lnewline();
- eopline = lforw(curwp->w_dotp);
- } else
- eopline = curwp->w_dotp;
-
- /* and back top the begining of the paragraph */
- (void)gotobop(FFRAND, 1);
-
- /* initialize various info */
- while (inword() == 0 && forwchar(FFRAND, 1));
-
- 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 && !eopflag) {
- retval = FALSE;
- goto cleanup;
- }
-
- /* if not a separator, just add it in */
- if (c != ' ' && c != '\t') {
- if (wordlen < MAXWORD - 1)
- wbuf[wordlen++] = c;
- else {
- /*
- * You lose chars beyond MAXWORD if the word
- * is too long. I'm too 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 tentative 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.
- * behave the same way if a ')' is preceded by a
- * [.?!] and followed by a doublespace.
- */
- if ((eolflag ||
- curwp->w_doto == llength(curwp->w_dotp) ||
- (c = lgetc(curwp->w_dotp, curwp->w_doto)) == ' '
- || c == '\t') && (ISEOSP(wbuf[wordlen - 1]) ||
- (wbuf[wordlen - 1] == ')' && wordlen >= 2 &&
- ISEOSP(wbuf[wordlen - 2]))) &&
- 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(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(1, wbuf[i]);
- ++clength;
- }
- wordlen = 0;
- }
- }
- /* and add a last newline for the end of our new paragraph */
- (void)lnewline();
-
- /*
- * We really 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
- * beginning of the blank line.
- */
- (void)backchar(FFRAND, 1);
- retval = TRUE;
-cleanup:
- undo_boundary_enable(FFRAND, 1);
- return (retval);
-}
-
-/*
- * Delete a paragraph. Delete n paragraphs starting with the current one.
- */
-/* ARGSUSED */
-int
-killpara(int f, int n)
-{
- int status; /* returned status of functions */
-
- /* for each paragraph to delete */
- while (n--) {
-
- /* mark out the end and beginning of the para to delete */
- (void)gotoeop(FFRAND, 1);
-
- /* set the mark here */
- curwp->w_markp = curwp->w_dotp;
- curwp->w_marko = curwp->w_doto;
-
- /* go to the beginning of the paragraph */
- (void)gotobop(FFRAND, 1);
-
- /* force us to the beginning of line */
- curwp->w_doto = 0;
-
- /* and delete it */
- if ((status = killregion(FFRAND, 1)) != TRUE)
- return (status);
-
- /* and clean up the 2 extra lines */
- (void)ldelete((RSIZE) 1, KFORW);
- }
- return (TRUE);
-}
-
-/*
- * Insert char with work wrap. Check to see if we're past fillcol, and if so,
- * justify this line. As a last step, justify the line.
- */
-/* ARGSUSED */
-int
-fillword(int f, int n)
-{
- char c;
- int col, i, nce;
-
- for (i = col = 0; col <= fillcol; ++i, ++col) {
- if (i == curwp->w_doto)
- return selfinsert(f, n);
- c = lgetc(curwp->w_dotp, i);
- if (c == '\t'
-#ifdef NOTAB
- && !(curbp->b_flag & BFNOTAB)
-#endif
- )
- col |= 0x07;
- else if (ISCTRL(c) != FALSE)
- ++col;
- }
- if (curwp->w_doto != llength(curwp->w_dotp)) {
- (void)selfinsert(f, n);
- 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(FFRAND, 1);
- } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' ' &&
- c != '\t' && curwp->w_doto > 0);
-
- if (curwp->w_doto == 0)
- do {
- (void)forwchar(FFRAND, 1);
- } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' ' &&
- c != '\t' && curwp->w_doto < llength(curwp->w_dotp));
-
- (void)delwhite(FFRAND, 1);
- (void)lnewline();
- i = llength(curwp->w_dotp) - nce;
- curwp->w_doto = i > 0 ? i : 0;
- curwp->w_rflag |= WFMOVE;
- if (nce == 0 && curwp->w_doto != 0)
- return (fillword(f, n));
- return (TRUE);
-}
-
-/*
- * Set fill column to n for justify.
- */
-int
-setfillcol(int f, int n)
-{
- char buf[32], *rep;
- const char *es;
- int nfill;
-
- if ((f & FFARG) != 0) {
- fillcol = n;
- } else {
- if ((rep = eread("Set fill-column: ", buf, sizeof(buf),
- EFNEW | EFCR)) == NULL)
- return (ABORT);
- else if (rep[0] == '\0')
- return (FALSE);
- nfill = strtonum(rep, 0, INT_MAX, &es);
- if (es != NULL) {
- ewprintf("Invalid fill column: %s", rep);
- return (FALSE);
- }
- fillcol = nfill;
- ewprintf("Fill column set to %d", fillcol);
- }
- return (TRUE);
-}
projects / pd_readline / blobdiff