=================================================================== RCS file: /cvs/mandoc/term.c,v retrieving revision 1.239 retrieving revision 1.254 diff -u -p -r1.239 -r1.254 --- mandoc/term.c 2014/12/23 06:16:46 1.239 +++ mandoc/term.c 2015/10/13 22:59:54 1.254 @@ -1,15 +1,15 @@ -/* $Id: term.c,v 1.239 2014/12/23 06:16:46 schwarze Exp $ */ +/* $Id: term.c,v 1.254 2015/10/13 22:59:54 schwarze Exp $ */ /* * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons - * Copyright (c) 2010-2014 Ingo Schwarze + * Copyright (c) 2010-2015 Ingo Schwarze * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF @@ -49,7 +49,7 @@ term_free(struct termp *p) void term_begin(struct termp *p, term_margin head, - term_margin foot, const void *arg) + term_margin foot, const struct roff_meta *arg) { p->headf = head; @@ -78,6 +78,8 @@ term_end(struct termp *p) * the next column. However, if less than p->trailspace blanks, * which can be 0, 1, or 2, remain to the right margin, the line * will be broken. + * - TERMP_BRTRSP: Consider trailing whitespace significant + * when deciding whether the chunk fits or not. * - TERMP_BRIND: If the chunk does not fit and the output line has * to be broken, start the next line at the right margin instead * of at the offset. Used together with TERMP_NOBREAK for the tags @@ -101,7 +103,6 @@ term_flushln(struct termp *p) size_t j; /* temporary loop index for p->buf */ size_t jhy; /* last hyph before overflow w/r/t j */ size_t maxvis; /* output position of visible boundary */ - size_t rmargin; /* the rightmost of the two margins */ /* * First, establish the maximum columns of "visible" content. @@ -114,8 +115,7 @@ term_flushln(struct termp *p) * is negative, it gets sign extended. Subtracting that * very large size_t effectively adds a small number to dv. */ - rmargin = p->rmargin > p->offset ? p->rmargin : p->offset; - dv = p->rmargin - p->offset; + 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) { @@ -193,8 +193,9 @@ term_flushln(struct termp *p) (*p->endline)(p); p->viscol = 0; if (TERMP_BRIND & p->flags) { - vbl = rmargin; - vend += rmargin - p->offset; + vbl = p->rmargin; + vend += p->rmargin; + vend -= p->offset; } else vbl = p->offset; @@ -266,6 +267,7 @@ term_flushln(struct termp *p) p->col = 0; p->overstep = 0; + p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE); if ( ! (TERMP_NOBREAK & p->flags)) { p->viscol = 0; @@ -274,7 +276,7 @@ term_flushln(struct termp *p) } if (TERMP_HANG & p->flags) { - p->overstep = (int)(vis - maxvis + + p->overstep += (int)(p->offset + vis - p->rmargin + p->trailspace * (*p->width)(p, ' ')); /* @@ -291,6 +293,10 @@ term_flushln(struct termp *p) } else if (TERMP_DANGLE & p->flags) return; + /* Trailing whitespace is significant in some columns. */ + if (vis && vbl && (TERMP_BRTRSP & p->flags)) + vis += vbl; + /* If the column was overrun, break the line. */ if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) { (*p->endline)(p); @@ -364,22 +370,14 @@ term_fontpush(struct termp *p, enum termfont f) p->fontq[p->fonti] = f; } -/* Retrieve pointer to current font. */ -const enum termfont * -term_fontq(struct termp *p) -{ - - return(&p->fontq[p->fonti]); -} - /* Flush to make the saved pointer current again. */ void -term_fontpopq(struct termp *p, const enum termfont *key) +term_fontpopq(struct termp *p, int i) { - while (p->fonti >= 0 && key < p->fontq + p->fonti) - p->fonti--; - assert(p->fonti >= 0); + assert(i >= 0); + if (p->fonti > i) + p->fonti = i; } /* Pop one font off the stack. */ @@ -422,14 +420,10 @@ term_word(struct termp *p, const char *word) p->flags |= TERMP_NOSPACE; p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE); + p->skipvsp = 0; while ('\0' != *word) { if ('\\' != *word) { - if (TERMP_SKIPCHAR & p->flags) { - p->flags &= ~TERMP_SKIPCHAR; - word++; - continue; - } if (TERMP_NBRWORD & p->flags) { if (' ' == *word) { encode(p, nbrsp, 1); @@ -460,12 +454,11 @@ term_word(struct termp *p, const char *word) break; case ESCAPE_SPECIAL: if (p->enc == TERMENC_ASCII) { - cp = mchars_spec2str(p->symtab, - seq, sz, &ssz); + cp = mchars_spec2str(seq, sz, &ssz); if (cp != NULL) encode(p, cp, ssz); } else { - uc = mchars_spec2cp(p->symtab, seq, sz); + uc = mchars_spec2cp(seq, sz); if (uc > 0) encode1(p, uc); } @@ -480,7 +473,6 @@ term_word(struct termp *p, const char *word) term_fontrepl(p, TERMFONT_BI); continue; case ESCAPE_FONT: - /* FALLTHROUGH */ case ESCAPE_FONTROMAN: term_fontrepl(p, TERMFONT_NONE); continue; @@ -488,14 +480,33 @@ term_word(struct termp *p, const char *word) term_fontlast(p); continue; case ESCAPE_NOSPACE: - if (TERMP_SKIPCHAR & p->flags) - p->flags &= ~TERMP_SKIPCHAR; - else if ('\0' == *word) + if (p->flags & TERMP_BACKAFTER) + p->flags &= ~TERMP_BACKAFTER; + else if (*word == '\0') p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE); continue; case ESCAPE_SKIPCHAR: - p->flags |= TERMP_SKIPCHAR; + p->flags |= TERMP_BACKAFTER; continue; + case ESCAPE_OVERSTRIKE: + cp = seq + sz; + while (seq < cp) { + if (*seq == '\\') { + mandoc_escape(&seq, NULL, NULL); + continue; + } + encode1(p, *seq++); + if (seq < cp) { + if (p->flags & TERMP_BACKBEFORE) + p->flags |= TERMP_BACKAFTER; + else + p->flags |= TERMP_BACKBEFORE; + } + } + /* Trim trailing backspace/blank pair. */ + if (p->col > 2 && p->buf[p->col - 1] == ' ') + p->col -= 2; + continue; default: continue; } @@ -550,16 +561,19 @@ encode1(struct termp *p, int c) { enum termfont f; - if (TERMP_SKIPCHAR & p->flags) { - p->flags &= ~TERMP_SKIPCHAR; - return; - } + if (p->col + 7 >= p->maxcols) + adjbuf(p, p->col + 7); - if (p->col + 6 >= p->maxcols) - adjbuf(p, p->col + 6); + f = (c == ASCII_HYPH || isgraph(c)) ? + p->fontq[p->fonti] : TERMFONT_NONE; - f = *term_fontq(p); - + if (p->flags & TERMP_BACKBEFORE) { + if (p->buf[p->col - 1] == ' ') + p->col--; + else + p->buf[p->col++] = 8; + p->flags &= ~TERMP_BACKBEFORE; + } if (TERMFONT_UNDER == f || TERMFONT_BI == f) { p->buf[p->col++] = '_'; p->buf[p->col++] = 8; @@ -572,6 +586,10 @@ encode1(struct termp *p, int c) p->buf[p->col++] = 8; } p->buf[p->col++] = c; + if (p->flags & TERMP_BACKAFTER) { + p->flags |= TERMP_BACKBEFORE; + p->flags &= ~TERMP_BACKAFTER; + } } static void @@ -579,30 +597,9 @@ encode(struct termp *p, const char *word, size_t sz) { size_t i; - if (TERMP_SKIPCHAR & p->flags) { - p->flags &= ~TERMP_SKIPCHAR; - return; - } + if (p->col + 2 + (sz * 5) >= p->maxcols) + adjbuf(p, p->col + 2 + (sz * 5)); - /* - * Encode and buffer a string of characters. If the current - * font mode is unset, buffer directly, else encode then buffer - * character by character. - */ - - if (*term_fontq(p) == TERMFONT_NONE) { - if (p->col + sz >= p->maxcols) - adjbuf(p, p->col + sz); - for (i = 0; i < sz; i++) - p->buf[p->col++] = word[i]; - return; - } - - /* Pre-buffer, assuming worst-case. */ - - if (p->col + 1 + (sz * 5) >= p->maxcols) - adjbuf(p, p->col + 1 + (sz * 5)); - for (i = 0; i < sz; i++) { if (ASCII_HYPH == word[i] || isgraph((unsigned char)word[i])) @@ -616,8 +613,7 @@ void term_setwidth(struct termp *p, const char *wstr) { struct roffsu su; - size_t width; - int iop; + int iop, width; iop = 0; width = 0; @@ -646,7 +642,7 @@ size_t term_len(const struct termp *p, size_t sz) { - return((*p->width)(p, ' ') * sz); + return (*p->width)(p, ' ') * sz; } static size_t @@ -655,9 +651,9 @@ cond_width(const struct termp *p, int c, int *skip) if (*skip) { (*skip) = 0; - return(0); + return 0; } else - return((*p->width)(p, c)); + return (*p->width)(p, c); } size_t @@ -703,13 +699,11 @@ term_strlen(const struct termp *p, const char *cp) break; case ESCAPE_SPECIAL: if (p->enc == TERMENC_ASCII) { - rhs = mchars_spec2str(p->symtab, - seq, ssz, &rsz); + rhs = mchars_spec2str(seq, ssz, &rsz); if (rhs != NULL) break; } else { - uc = mchars_spec2cp(p->symtab, - seq, ssz); + uc = mchars_spec2cp(seq, ssz); if (uc > 0) sz += cond_width(p, uc, &skip); } @@ -717,6 +711,20 @@ term_strlen(const struct termp *p, const char *cp) case ESCAPE_SKIPCHAR: skip = 1; continue; + case ESCAPE_OVERSTRIKE: + rsz = 0; + rhs = seq + ssz; + while (seq < rhs) { + if (*seq == '\\') { + mandoc_escape(&seq, NULL, NULL); + continue; + } + i = (*p->width)(p, *seq++); + if (rsz < i) + rsz = i; + } + sz += rsz; + continue; default: continue; } @@ -759,21 +767,20 @@ term_strlen(const struct termp *p, const char *cp) case ASCII_HYPH: sz += cond_width(p, '-', &skip); cp++; - /* FALLTHROUGH */ - case ASCII_BREAK: break; default: break; } } - return(sz); + return sz; } -size_t +int term_vspan(const struct termp *p, const struct roffsu *su) { double r; + int ri; switch (su->unit) { case SCALE_BU: @@ -798,7 +805,6 @@ term_vspan(const struct termp *p, const struct roffsu r = su->scale / 12.0; break; case SCALE_EN: - /* FALLTHROUGH */ case SCALE_EM: r = su->scale * 0.6; break; @@ -807,21 +813,17 @@ term_vspan(const struct termp *p, const struct roffsu break; default: abort(); - /* NOTREACHED */ } - - if (r < 0.0) - r = 0.0; - return((size_t)(r + 0.4995)); + ri = r > 0.0 ? r + 0.4995 : r - 0.4995; + return ri < 66 ? ri : 1; } -size_t +/* + * Convert a scaling width to basic units, rounding down. + */ +int term_hspan(const struct termp *p, const struct roffsu *su) { - double v; - v = (*p->hspan)(p, su); - if (v < 0.0) - v = 0.0; - return((size_t)(v + 0.0005)); + return (*p->hspan)(p, su); }