diff options
Diffstat (limited to 'term.c')
| -rw-r--r-- | term.c | 85 |
1 files changed, 24 insertions, 61 deletions
@@ -84,11 +84,11 @@ term_end(struct termp *p) * to be broken, start the next line at the right margin instead * of at the offset. Used together with TERMP_NOBREAK for the tags * in various kinds of tagged lists. - * - TERMP_DANGLE: Do not break the output line at the right margin, + * - TERMP_HANG: Do not break the output line at the right margin, * append the next chunk after it even if this one is too long. * To be used together with TERMP_NOBREAK. - * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before - * the next chunk if this column is not full. + * - TERMP_NOPAD: Start writing at the current position, + * do not pad with blank characters up to the offset. */ void term_flushln(struct termp *p) @@ -104,34 +104,15 @@ term_flushln(struct termp *p) size_t jhy; /* last hyph before overflow w/r/t j */ size_t maxvis; /* output position of visible boundary */ - /* - * First, establish the maximum columns of "visible" content. - * This is usually the difference between the right-margin and - * an indentation, but can be, for tagged lists or columns, a - * small set of values. - * - * The following unsigned-signed subtractions look strange, - * but they are actually correct. If the int p->overstep - * is negative, it gets sign extended. Subtracting that - * very large size_t effectively adds a small number to dv. - */ - dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0; - maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0; - - if (p->flags & TERMP_NOBREAK) { - dv = p->maxrmargin > p->offset ? - p->maxrmargin - p->offset : 0; - bp = (int)dv > p->overstep ? - dv - (size_t)p->overstep : 0; - } else - bp = maxvis; - - /* - * Calculate the required amount of padding. - */ - vbl = p->offset + p->overstep > p->viscol ? - p->offset + p->overstep - p->viscol : 0; - + vbl = (p->flags & TERMP_NOPAD) || p->offset < p->viscol ? 0 : + p->offset - p->viscol; + if (p->minbl && vbl < p->minbl) + vbl = p->minbl; + maxvis = p->rmargin > p->viscol + vbl ? + p->rmargin - p->viscol - vbl : 0; + bp = !(p->flags & TERMP_NOBREAK) ? maxvis : + p->maxrmargin > p->viscol + vbl ? + p->maxrmargin - p->viscol - vbl : 0; vis = vend = 0; i = 0; @@ -201,20 +182,13 @@ term_flushln(struct termp *p) /* Re-establish indentation. */ - if (p->flags & TERMP_BRIND) { + if (p->flags & TERMP_BRIND) vbl += p->rmargin; - vend += p->rmargin - p->offset; - } else + else vbl += p->offset; - - /* - * Remove the p->overstep width. - * Again, if p->overstep is negative, - * sign extension does the right thing. - */ - - bp += (size_t)p->overstep; - p->overstep = 0; + maxvis = p->rmargin > vbl ? p->rmargin - vbl : 0; + bp = !(p->flags & TERMP_NOBREAK) ? maxvis : + p->maxrmargin > vbl ? p->maxrmargin - vbl : 0; } /* Write out the [remaining] word. */ @@ -269,32 +243,19 @@ term_flushln(struct termp *p) vis = 0; p->col = 0; - p->overstep = 0; - p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE); + p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD); if ( ! (TERMP_NOBREAK & p->flags)) { p->viscol = 0; + p->minbl = 0; (*p->endline)(p); return; } if (TERMP_HANG & p->flags) { - p->overstep += (int)(p->offset + vis - p->rmargin + - p->trailspace * (*p->width)(p, ' ')); - - /* - * If we have overstepped the margin, temporarily move - * it to the right and flag the rest of the line to be - * shorter. - * If there is a request to keep the columns together, - * allow negative overstep when the column is not full. - */ - if (p->trailspace && p->overstep < 0) - p->overstep = 0; - return; - - } else if (TERMP_DANGLE & p->flags) + p->minbl = p->trailspace; return; + } /* Trailing whitespace is significant in some columns. */ if (vis && vbl && (TERMP_BRTRSP & p->flags)) @@ -304,7 +265,9 @@ term_flushln(struct termp *p) if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) { (*p->endline)(p); p->viscol = 0; - } + p->minbl = 0; + } else + p->minbl = p->trailspace; } /* |