diff options
Diffstat (limited to 'term.c')
| -rw-r--r-- | term.c | 43 |
1 files changed, 37 insertions, 6 deletions
@@ -157,7 +157,11 @@ term_flushln(struct termp *p) /* Finally, print the field content. */ term_field(p, vbl, nbr); - p->tcol->taboff += vbr + (*p->width)(p, ' '); + if (vbr < vtarget) + p->tcol->taboff += vbr; + else + p->tcol->taboff += vtarget; + p->tcol->taboff += (*p->width)(p, ' '); /* * If there is no text left in the field, exit the loop. @@ -177,7 +181,9 @@ term_flushln(struct termp *p) vbr += (*p->width)(p, ' '); continue; case '\n': + case ASCII_NBRZW: case ASCII_BREAK: + case ASCII_TABREF: continue; default: break; @@ -258,9 +264,11 @@ term_fill(struct termp *p, size_t *nbr, size_t *vbr, size_t vtarget) size_t vn; /* Visual position of the next character. */ int breakline; /* Break at the end of this word. */ int graph; /* Last character was non-blank. */ + int taboff; /* Temporary offset for literal tabs. */ *nbr = *vbr = vis = 0; breakline = graph = 0; + taboff = p->tcol->taboff; for (ic = p->tcol->col; ic < p->tcol->lastcol; ic++) { switch (p->tcol->buf[ic]) { case '\b': /* Escape \o (overstrike) or backspace markup. */ @@ -306,12 +314,19 @@ term_fill(struct termp *p, size_t *nbr, size_t *vbr, size_t vtarget) *vbr = vis; continue; + case ASCII_TABREF: + taboff = -vis - (*p->width)(p, ' '); + continue; + default: switch (p->tcol->buf[ic]) { case '\t': - vis += p->tcol->taboff; + if (taboff < 0 && (size_t)-taboff > vis) + vis = 0; + else + vis += taboff; vis = term_tab_next(vis); - vis -= p->tcol->taboff; + vis -= taboff; break; case ASCII_NBRZW: /* Non-breakable zero-width. */ break; @@ -354,8 +369,10 @@ term_field(struct termp *p, size_t vbl, size_t nbr) size_t vis; /* Visual position of the current character. */ size_t vt; /* Visual position including tab offset. */ size_t dv; /* Visual width of the current character. */ + int taboff; /* Temporary offset for literal tabs. */ vis = 0; + taboff = p->tcol->taboff; for (ic = p->tcol->col; ic < nbr; ic++) { /* @@ -368,11 +385,17 @@ term_field(struct termp *p, size_t vbl, size_t nbr) case ASCII_BREAK: case ASCII_NBRZW: continue; + case ASCII_TABREF: + taboff = -vis - (*p->width)(p, ' '); + continue; case '\t': case ' ': case ASCII_NBRSP: if (p->tcol->buf[ic] == '\t') { - vt = p->tcol->taboff + vis; + if (taboff < 0 && (size_t)-taboff > vis) + vt = 0; + else + vt = vis + taboff; dv = term_tab_next(vt) - vt; } else dv = (*p->width)(p, ' '); @@ -437,10 +460,10 @@ endline(struct termp *p) void term_newln(struct termp *p) { - p->tcol->taboff = 0; p->flags |= TERMP_NOSPACE; if (p->tcol->lastcol || p->viscol) term_flushln(p); + p->tcol->taboff = 0; } /* @@ -801,6 +824,14 @@ bufferc(struct termp *p, char c) p->tcol->lastcol = p->col; } +void +term_tab_ref(struct termp *p) +{ + if (p->tcol->lastcol && p->tcol->lastcol <= p->col && + (p->flags & TERMP_NOBUF) == 0) + bufferc(p, ASCII_TABREF); +} + /* * See encode(). * Do this for a single (probably unicode) value. @@ -946,7 +977,7 @@ term_strlen(const struct termp *p, const char *cp) const char *seq, *rhs; enum mandoc_esc esc; static const char rej[] = { '\\', ASCII_NBRSP, ASCII_NBRZW, - ASCII_BREAK, ASCII_HYPH, '\0' }; + ASCII_BREAK, ASCII_HYPH, ASCII_TABREF, '\0' }; /* * Account for escaped sequences within string length |