version 1.254, 2015/10/13 22:59:54 |
version 1.263, 2017/06/04 18:50:35 |
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/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv> |
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv> |
* Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org> |
* Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
Line 84 term_end(struct termp *p) |
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Line 84 term_end(struct termp *p) |
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* to be broken, start the next line at the right margin instead |
* to be broken, start the next line at the right margin instead |
* of at the offset. Used together with TERMP_NOBREAK for the tags |
* of at the offset. Used together with TERMP_NOBREAK for the tags |
* in various kinds of tagged lists. |
* 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. |
* append the next chunk after it even if this one is too long. |
* To be used together with TERMP_NOBREAK. |
* To be used together with TERMP_NOBREAK. |
* - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before |
* - TERMP_NOPAD: Start writing at the current position, |
* the next chunk if this column is not full. |
* do not pad with blank characters up to the offset. |
*/ |
*/ |
void |
void |
term_flushln(struct termp *p) |
term_flushln(struct termp *p) |
Line 104 term_flushln(struct termp *p) |
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Line 104 term_flushln(struct termp *p) |
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size_t jhy; /* last hyph before overflow w/r/t j */ |
size_t jhy; /* last hyph before overflow w/r/t j */ |
size_t maxvis; /* output position of visible boundary */ |
size_t maxvis; /* output position of visible boundary */ |
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/* |
vbl = (p->flags & TERMP_NOPAD) || p->offset < p->viscol ? 0 : |
* First, establish the maximum columns of "visible" content. |
p->offset - p->viscol; |
* This is usually the difference between the right-margin and |
if (p->minbl && vbl < p->minbl) |
* an indentation, but can be, for tagged lists or columns, a |
vbl = p->minbl; |
* small set of values. |
maxvis = p->rmargin > p->viscol + vbl ? |
* |
p->rmargin - p->viscol - vbl : 0; |
* The following unsigned-signed subtractions look strange, |
bp = !(p->flags & TERMP_NOBREAK) ? maxvis : |
* but they are actually correct. If the int p->overstep |
p->maxrmargin > p->viscol + vbl ? |
* is negative, it gets sign extended. Subtracting that |
p->maxrmargin - p->viscol - vbl : 0; |
* very large size_t effectively adds a small number to dv. |
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*/ |
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dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0; |
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maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0; |
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if (p->flags & TERMP_NOBREAK) { |
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dv = p->maxrmargin > p->offset ? |
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p->maxrmargin - p->offset : 0; |
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bp = (int)dv > p->overstep ? |
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dv - (size_t)p->overstep : 0; |
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} else |
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bp = maxvis; |
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/* |
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* Calculate the required amount of padding. |
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*/ |
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vbl = p->offset + p->overstep > p->viscol ? |
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p->offset + p->overstep - p->viscol : 0; |
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vis = vend = 0; |
vis = vend = 0; |
i = 0; |
i = 0; |
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Line 141 term_flushln(struct termp *p) |
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Line 122 term_flushln(struct termp *p) |
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* subsequent tabs into a single huge set of spaces. |
* subsequent tabs into a single huge set of spaces. |
*/ |
*/ |
ntab = 0; |
ntab = 0; |
while (i < p->col && '\t' == p->buf[i]) { |
while (i < p->col && p->buf[i] == '\t') { |
vend = (vis / p->tabwidth + 1) * p->tabwidth; |
vend = term_tab_next(vis); |
vbl += vend - vis; |
vbl += vend - vis; |
vis = vend; |
vis = vend; |
ntab++; |
ntab++; |
Line 160 term_flushln(struct termp *p) |
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Line 141 term_flushln(struct termp *p) |
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if (' ' == p->buf[j] || '\t' == p->buf[j]) |
if (' ' == p->buf[j] || '\t' == p->buf[j]) |
break; |
break; |
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/* Back over the the last printed character. */ |
/* Back over the last printed character. */ |
if (8 == p->buf[j]) { |
if (8 == p->buf[j]) { |
assert(j); |
assert(j); |
vend -= (*p->width)(p, p->buf[j - 1]); |
vend -= (*p->width)(p, p->buf[j - 1]); |
Line 192 term_flushln(struct termp *p) |
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Line 173 term_flushln(struct termp *p) |
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vend -= vis; |
vend -= vis; |
(*p->endline)(p); |
(*p->endline)(p); |
p->viscol = 0; |
p->viscol = 0; |
if (TERMP_BRIND & p->flags) { |
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vbl = p->rmargin; |
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vend += p->rmargin; |
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vend -= p->offset; |
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} else |
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vbl = p->offset; |
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/* use pending tabs on the new line */ |
/* Use pending tabs on the new line. */ |
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if (0 < ntab) |
vbl = 0; |
vbl += ntab * p->tabwidth; |
while (ntab--) |
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vbl = term_tab_next(vbl); |
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/* |
/* Re-establish indentation. */ |
* Remove the p->overstep width. |
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* Again, if p->overstep is negative, |
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* sign extension does the right thing. |
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*/ |
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bp += (size_t)p->overstep; |
if (p->flags & TERMP_BRIND) |
p->overstep = 0; |
vbl += p->rmargin; |
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else |
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vbl += p->offset; |
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maxvis = p->rmargin > vbl ? p->rmargin - vbl : 0; |
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bp = !(p->flags & TERMP_NOBREAK) ? maxvis : |
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p->maxrmargin > vbl ? p->maxrmargin - vbl : 0; |
} |
} |
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/* Write out the [remaining] word. */ |
/* Write out the [remaining] word. */ |
Line 266 term_flushln(struct termp *p) |
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Line 243 term_flushln(struct termp *p) |
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vis = 0; |
vis = 0; |
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p->col = 0; |
p->col = 0; |
p->overstep = 0; |
p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD); |
p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE); |
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if ( ! (TERMP_NOBREAK & p->flags)) { |
if ( ! (TERMP_NOBREAK & p->flags)) { |
p->viscol = 0; |
p->viscol = 0; |
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p->minbl = 0; |
(*p->endline)(p); |
(*p->endline)(p); |
return; |
return; |
} |
} |
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if (TERMP_HANG & p->flags) { |
if (TERMP_HANG & p->flags) { |
p->overstep += (int)(p->offset + vis - p->rmargin + |
p->minbl = p->trailspace; |
p->trailspace * (*p->width)(p, ' ')); |
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/* |
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* If we have overstepped the margin, temporarily move |
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* it to the right and flag the rest of the line to be |
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* shorter. |
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* If there is a request to keep the columns together, |
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* allow negative overstep when the column is not full. |
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*/ |
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if (p->trailspace && p->overstep < 0) |
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p->overstep = 0; |
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return; |
return; |
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} |
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} else if (TERMP_DANGLE & p->flags) |
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return; |
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/* Trailing whitespace is significant in some columns. */ |
/* Trailing whitespace is significant in some columns. */ |
if (vis && vbl && (TERMP_BRTRSP & p->flags)) |
if (vis && vbl && (TERMP_BRTRSP & p->flags)) |
vis += vbl; |
vis += vbl; |
Line 301 term_flushln(struct termp *p) |
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Line 265 term_flushln(struct termp *p) |
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if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) { |
if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) { |
(*p->endline)(p); |
(*p->endline)(p); |
p->viscol = 0; |
p->viscol = 0; |
} |
p->minbl = 0; |
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} else |
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p->minbl = p->trailspace; |
} |
} |
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/* |
/* |
Line 365 term_fontpush(struct termp *p, enum termfont f) |
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Line 331 term_fontpush(struct termp *p, enum termfont f) |
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if (++p->fonti == p->fontsz) { |
if (++p->fonti == p->fontsz) { |
p->fontsz += 8; |
p->fontsz += 8; |
p->fontq = mandoc_reallocarray(p->fontq, |
p->fontq = mandoc_reallocarray(p->fontq, |
p->fontsz, sizeof(enum termfont *)); |
p->fontsz, sizeof(*p->fontq)); |
} |
} |
p->fontq[p->fonti] = f; |
p->fontq[p->fonti] = f; |
} |
} |
Line 397 term_fontpop(struct termp *p) |
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Line 363 term_fontpop(struct termp *p) |
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void |
void |
term_word(struct termp *p, const char *word) |
term_word(struct termp *p, const char *word) |
{ |
{ |
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struct roffsu su; |
const char nbrsp[2] = { ASCII_NBRSP, 0 }; |
const char nbrsp[2] = { ASCII_NBRSP, 0 }; |
const char *seq, *cp; |
const char *seq, *cp; |
int sz, uc; |
int sz, uc; |
size_t ssz; |
size_t csz, lsz, ssz; |
enum mandoc_esc esc; |
enum mandoc_esc esc; |
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if ( ! (TERMP_NOSPACE & p->flags)) { |
if ( ! (TERMP_NOSPACE & p->flags)) { |
Line 485 term_word(struct termp *p, const char *word) |
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Line 452 term_word(struct termp *p, const char *word) |
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else if (*word == '\0') |
else if (*word == '\0') |
p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE); |
p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE); |
continue; |
continue; |
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case ESCAPE_HORIZ: |
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if (a2roffsu(seq, &su, SCALE_EM) == 0) |
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continue; |
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uc = term_hspan(p, &su) / 24; |
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if (uc > 0) |
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while (uc-- > 0) |
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bufferc(p, ASCII_NBRSP); |
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else if (p->col > (size_t)(-uc)) |
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p->col += uc; |
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else { |
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uc += p->col; |
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p->col = 0; |
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if (p->offset > (size_t)(-uc)) { |
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p->ti += uc; |
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p->offset += uc; |
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} else { |
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p->ti -= p->offset; |
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p->offset = 0; |
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} |
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} |
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continue; |
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case ESCAPE_HLINE: |
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if (a2roffsu(seq, &su, SCALE_EM) == 0) |
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continue; |
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uc = term_hspan(p, &su) / 24; |
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if (uc <= 0) { |
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if (p->rmargin <= p->offset) |
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continue; |
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lsz = p->rmargin - p->offset; |
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} else |
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lsz = uc; |
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while (sz && |
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strchr(" %&()*+-./0123456789:<=>", *seq)) { |
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seq++; |
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sz--; |
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} |
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if (sz && strchr("cifMmnPpuv", *seq)) { |
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seq++; |
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sz--; |
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} |
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if (sz == 0) |
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uc = -1; |
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else if (*seq == '\\') { |
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seq++; |
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esc = mandoc_escape(&seq, &cp, &sz); |
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switch (esc) { |
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case ESCAPE_UNICODE: |
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uc = mchars_num2uc(cp + 1, sz - 1); |
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break; |
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case ESCAPE_NUMBERED: |
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uc = mchars_num2char(cp, sz); |
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break; |
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case ESCAPE_SPECIAL: |
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uc = mchars_spec2cp(cp, sz); |
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break; |
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default: |
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uc = -1; |
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break; |
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} |
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} else |
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uc = *seq; |
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if (uc < 0x20 || (uc > 0x7E && uc < 0xA0)) |
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uc = '_'; |
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if (p->enc == TERMENC_ASCII) { |
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cp = ascii_uc2str(uc); |
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csz = term_strlen(p, cp); |
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ssz = strlen(cp); |
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} else |
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csz = (*p->width)(p, uc); |
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while (lsz >= csz) { |
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if (p->enc == TERMENC_ASCII) |
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encode(p, cp, ssz); |
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else |
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encode1(p, uc); |
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lsz -= csz; |
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} |
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continue; |
case ESCAPE_SKIPCHAR: |
case ESCAPE_SKIPCHAR: |
p->flags |= TERMP_BACKAFTER; |
p->flags |= TERMP_BACKAFTER; |
continue; |
continue; |
Line 504 term_word(struct termp *p, const char *word) |
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Line 548 term_word(struct termp *p, const char *word) |
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} |
} |
} |
} |
/* Trim trailing backspace/blank pair. */ |
/* Trim trailing backspace/blank pair. */ |
if (p->col > 2 && p->buf[p->col - 1] == ' ') |
if (p->col > 2 && |
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(p->buf[p->col - 1] == ' ' || |
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p->buf[p->col - 1] == '\t')) |
p->col -= 2; |
p->col -= 2; |
continue; |
continue; |
default: |
default: |
Line 564 encode1(struct termp *p, int c) |
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Line 610 encode1(struct termp *p, int c) |
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if (p->col + 7 >= p->maxcols) |
if (p->col + 7 >= p->maxcols) |
adjbuf(p, p->col + 7); |
adjbuf(p, p->col + 7); |
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f = (c == ASCII_HYPH || isgraph(c)) ? |
f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ? |
p->fontq[p->fonti] : TERMFONT_NONE; |
p->fontq[p->fonti] : TERMFONT_NONE; |
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if (p->flags & TERMP_BACKBEFORE) { |
if (p->flags & TERMP_BACKBEFORE) { |
if (p->buf[p->col - 1] == ' ') |
if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t') |
p->col--; |
p->col--; |
else |
else |
p->buf[p->col++] = 8; |
p->buf[p->col++] = 8; |
Line 604 encode(struct termp *p, const char *word, size_t sz) |
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Line 650 encode(struct termp *p, const char *word, size_t sz) |
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if (ASCII_HYPH == word[i] || |
if (ASCII_HYPH == word[i] || |
isgraph((unsigned char)word[i])) |
isgraph((unsigned char)word[i])) |
encode1(p, word[i]); |
encode1(p, word[i]); |
else |
else { |
p->buf[p->col++] = word[i]; |
p->buf[p->col++] = word[i]; |
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/* |
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* Postpone the effect of \z while handling |
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* an overstrike sequence from ascii_uc2str(). |
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*/ |
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if (word[i] == '\b' && |
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(p->flags & TERMP_BACKBEFORE)) { |
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p->flags &= ~TERMP_BACKBEFORE; |
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p->flags |= TERMP_BACKAFTER; |
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} |
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} |
} |
} |
} |
} |
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