=================================================================== RCS file: /cvs/mandoc/term.c,v retrieving revision 1.1 retrieving revision 1.274 diff -u -p -r1.1 -r1.274 --- mandoc/term.c 2009/02/20 11:04:23 1.1 +++ mandoc/term.c 2017/07/28 14:25:48 1.274 @@ -1,360 +1,995 @@ -/* $Id: term.c,v 1.1 2009/02/20 11:04:23 kristaps Exp $ */ +/* $Id: term.c,v 1.274 2017/07/28 14:25:48 schwarze Exp $ */ /* - * Copyright (c) 2008 Kristaps Dzonsons + * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons + * Copyright (c) 2010-2017 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. + * 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 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE - * AUTHOR 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 OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. + * 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 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 + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include "config.h" + +#include + #include -#include -#include -#include +#include #include +#include #include -#include -#include -#include "mdoc.h" +#include "mandoc.h" +#include "mandoc_aux.h" +#include "out.h" +#include "term.h" +#include "main.h" +static size_t cond_width(const struct termp *, int, int *); +static void adjbuf(struct termp_col *, size_t); +static void bufferc(struct termp *, char); +static void encode(struct termp *, const char *, size_t); +static void encode1(struct termp *, int); +static void endline(struct termp *); -static int termprint_r(size_t, size_t, - const struct mdoc_node *); -static void termprint_head(size_t, - const struct mdoc_meta *); -static void termprint_tail(size_t, - const struct mdoc_meta *); -static char *arch2a(enum mdoc_arch); -static char *vol2a(enum mdoc_vol); -static char *msec2a(enum mdoc_msec); +void +term_setcol(struct termp *p, size_t maxtcol) +{ + if (maxtcol > p->maxtcol) { + p->tcols = mandoc_recallocarray(p->tcols, + p->maxtcol, maxtcol, sizeof(*p->tcols)); + p->maxtcol = maxtcol; + } + p->lasttcol = maxtcol - 1; + p->tcol = p->tcols; +} -static size_t ttitle2a(char *, enum mdoc_vol, enum mdoc_msec, - enum mdoc_arch, size_t); +void +term_free(struct termp *p) +{ + for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++) + free(p->tcol->buf); + free(p->tcols); + free(p->fontq); + free(p); +} +void +term_begin(struct termp *p, term_margin head, + term_margin foot, const struct roff_meta *arg) +{ -static char * -arch2a(enum mdoc_arch arch) + p->headf = head; + p->footf = foot; + p->argf = arg; + (*p->begin)(p); +} + +void +term_end(struct termp *p) { - switch (arch) { - case (ARCH_alpha): - return("Alpha"); - case (ARCH_amd64): - return("AMD64"); - case (ARCH_amiga): - return("Amiga"); - case (ARCH_arc): - return("ARC"); - case (ARCH_arm): - return("ARM"); - case (ARCH_armish): - return("ARMISH"); - case (ARCH_aviion): - return("AViion"); - case (ARCH_hp300): - return("HP300"); - case (ARCH_hppa): - return("HPPA"); - case (ARCH_hppa64): - return("HPPA64"); - case (ARCH_i386): - return("i386"); - case (ARCH_landisk): - return("LANDISK"); - case (ARCH_luna88k): - return("Luna88k"); - case (ARCH_mac68k): - return("Mac68k"); - case (ARCH_macppc): - return("MacPPC"); - case (ARCH_mvme68k): - return("MVME68k"); - case (ARCH_mvme88k): - return("MVME88k"); - case (ARCH_mvmeppc): - return("MVMEPPC"); - case (ARCH_pmax): - return("PMAX"); - case (ARCH_sgi): - return("SGI"); - case (ARCH_socppc): - return("SOCPPC"); - case (ARCH_sparc): - return("SPARC"); - case (ARCH_sparc64): - return("SPARC64"); - case (ARCH_sun3): - return("Sun3"); - case (ARCH_vax): - return("VAX"); - case (ARCH_zaurus): - return("Zaurus"); - default: - break; + (*p->end)(p); +} + +/* + * Flush a chunk of text. By default, break the output line each time + * the right margin is reached, and continue output on the next line + * at the same offset as the chunk itself. By default, also break the + * output line at the end of the chunk. + * The following flags may be specified: + * + * - TERMP_NOBREAK: Do not break the output line at the right margin, + * but only at the max right margin. Also, do not break the output + * line at the end of the chunk, such that the next call can pad to + * 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 + * in various kinds of tagged lists. + * - 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_NOPAD: Start writing at the current position, + * do not pad with blank characters up to the offset. + */ +void +term_flushln(struct termp *p) +{ + size_t vis; /* current visual position on output */ + size_t vbl; /* number of blanks to prepend to output */ + size_t vend; /* end of word visual position on output */ + size_t bp; /* visual right border position */ + size_t dv; /* temporary for visual pos calculations */ + size_t j; /* temporary loop index for p->tcol->buf */ + size_t jhy; /* last hyph before overflow w/r/t j */ + size_t maxvis; /* output position of visible boundary */ + int ntab; /* number of tabs to prepend */ + int breakline; /* after this word */ + + vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ? + 0 : p->tcol->offset - p->viscol; + if (p->minbl && vbl < p->minbl) + vbl = p->minbl; + maxvis = p->tcol->rmargin > p->viscol + vbl ? + p->tcol->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; + + if ((p->flags & TERMP_MULTICOL) == 0) + p->tcol->col = 0; + while (p->tcol->col < p->tcol->lastcol) { + + /* + * Handle literal tab characters: collapse all + * subsequent tabs into a single huge set of spaces. + */ + + ntab = 0; + while (p->tcol->col < p->tcol->lastcol && + p->tcol->buf[p->tcol->col] == '\t') { + vend = term_tab_next(vis); + vbl += vend - vis; + vis = vend; + ntab++; + p->tcol->col++; + } + + /* + * Count up visible word characters. Control sequences + * (starting with the CSI) aren't counted. A space + * generates a non-printing word, which is valid (the + * space is printed according to regular spacing rules). + */ + + jhy = 0; + breakline = 0; + for (j = p->tcol->col; j < p->tcol->lastcol; j++) { + if (p->tcol->buf[j] == '\n') { + if ((p->flags & TERMP_BRIND) == 0) + breakline = 1; + continue; + } + if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t') + break; + + /* Back over the last printed character. */ + if (p->tcol->buf[j] == '\b') { + assert(j); + vend -= (*p->width)(p, p->tcol->buf[j - 1]); + continue; + } + + /* Regular word. */ + /* Break at the hyphen point if we overrun. */ + if (vend > vis && vend < bp && + (p->tcol->buf[j] == ASCII_HYPH|| + p->tcol->buf[j] == ASCII_BREAK)) + jhy = j; + + /* + * Hyphenation now decided, put back a real + * hyphen such that we get the correct width. + */ + if (p->tcol->buf[j] == ASCII_HYPH) + p->tcol->buf[j] = '-'; + + vend += (*p->width)(p, p->tcol->buf[j]); + } + + /* + * Find out whether we would exceed the right margin. + * If so, break to the next line. + */ + + if (vend > bp && jhy == 0 && vis > 0 && + (p->flags & TERMP_BRNEVER) == 0) { + if (p->flags & TERMP_MULTICOL) + return; + + endline(p); + vend -= vis; + + /* Use pending tabs on the new line. */ + + vbl = 0; + while (ntab--) + vbl = term_tab_next(vbl); + + /* Re-establish indentation. */ + + if (p->flags & TERMP_BRIND) + vbl += p->tcol->rmargin; + else + vbl += p->tcol->offset; + maxvis = p->tcol->rmargin > vbl ? + p->tcol->rmargin - vbl : 0; + bp = !(p->flags & TERMP_NOBREAK) ? maxvis : + p->maxrmargin > vbl ? p->maxrmargin - vbl : 0; + } + + /* + * Write out the rest of the word. + */ + + for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) { + if (vend > bp && jhy > 0 && p->tcol->col > jhy) + break; + if (p->tcol->buf[p->tcol->col] == '\n') + continue; + if (p->tcol->buf[p->tcol->col] == '\t') + break; + if (p->tcol->buf[p->tcol->col] == ' ') { + j = p->tcol->col; + while (p->tcol->col < p->tcol->lastcol && + p->tcol->buf[p->tcol->col] == ' ') + p->tcol->col++; + dv = (p->tcol->col - j) * (*p->width)(p, ' '); + vbl += dv; + vend += dv; + break; + } + if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) { + vbl += (*p->width)(p, ' '); + continue; + } + if (p->tcol->buf[p->tcol->col] == ASCII_BREAK) + continue; + + /* + * Now we definitely know there will be + * printable characters to output, + * so write preceding white space now. + */ + if (vbl) { + (*p->advance)(p, vbl); + p->viscol += vbl; + vbl = 0; + } + + (*p->letter)(p, p->tcol->buf[p->tcol->col]); + if (p->tcol->buf[p->tcol->col] == '\b') + p->viscol -= (*p->width)(p, + p->tcol->buf[p->tcol->col - 1]); + else + p->viscol += (*p->width)(p, + p->tcol->buf[p->tcol->col]); + } + vis = vend; + + if (breakline == 0) + continue; + + /* Explicitly requested output line break. */ + + if (p->flags & TERMP_MULTICOL) + return; + + endline(p); + breakline = 0; + vis = vend = 0; + + /* Re-establish indentation. */ + + vbl = p->tcol->offset; + maxvis = p->tcol->rmargin > vbl ? + p->tcol->rmargin - vbl : 0; + bp = !(p->flags & TERMP_NOBREAK) ? maxvis : + p->maxrmargin > vbl ? p->maxrmargin - vbl : 0; } - return(NULL); + /* + * If there was trailing white space, it was not printed; + * so reset the cursor position accordingly. + */ + + if (vis > vbl) + vis -= vbl; + else + vis = 0; + + p->col = p->tcol->col = p->tcol->lastcol = 0; + p->minbl = p->trailspace; + p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD); + + if (p->flags & TERMP_MULTICOL) + 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 ((p->flags & TERMP_NOBREAK) == 0 || + ((p->flags & TERMP_HANG) == 0 && + vis + p->trailspace * (*p->width)(p, ' ') > maxvis)) + endline(p); } +static void +endline(struct termp *p) +{ + if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) { + p->mc = NULL; + p->flags &= ~TERMP_ENDMC; + } + if (p->mc != NULL) { + if (p->viscol && p->maxrmargin >= p->viscol) + (*p->advance)(p, p->maxrmargin - p->viscol + 1); + p->flags |= TERMP_NOBUF | TERMP_NOSPACE; + term_word(p, p->mc); + p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC); + } + p->viscol = 0; + p->minbl = 0; + (*p->endline)(p); +} -static char * -vol2a(enum mdoc_vol vol) +/* + * A newline only breaks an existing line; it won't assert vertical + * space. All data in the output buffer is flushed prior to the newline + * assertion. + */ +void +term_newln(struct termp *p) { - switch (vol) { - case (VOL_AMD): - return("OpenBSD Ancestral Manual Documents"); - case (VOL_IND): - return("OpenBSD Manual Master Index"); - case (VOL_KM): - return("OpenBSD Kernel Manual"); - case (VOL_LOCAL): - return("OpenBSD Local Manual"); - case (VOL_PRM): - return("OpenBSD Programmer's Manual"); - case (VOL_PS1): - return("OpenBSD Programmer's Supplementary Documents"); - case (VOL_SMM): - return("OpenBSD System Manager's Manual"); - case (VOL_URM): - return("OpenBSD Reference Manual"); - case (VOL_USD): - return("OpenBSD User's Supplementary Documents"); - default: - break; - } + p->flags |= TERMP_NOSPACE; + if (p->tcol->lastcol || p->viscol) + term_flushln(p); +} - return(NULL); +/* + * Asserts a vertical space (a full, empty line-break between lines). + * Note that if used twice, this will cause two blank spaces and so on. + * All data in the output buffer is flushed prior to the newline + * assertion. + */ +void +term_vspace(struct termp *p) +{ + + term_newln(p); + p->viscol = 0; + p->minbl = 0; + if (0 < p->skipvsp) + p->skipvsp--; + else + (*p->endline)(p); } +/* Swap current and previous font; for \fP and .ft P */ +void +term_fontlast(struct termp *p) +{ + enum termfont f; -static char * -msec2a(enum mdoc_msec msec) + f = p->fontl; + p->fontl = p->fontq[p->fonti]; + p->fontq[p->fonti] = f; +} + +/* Set font, save current, discard previous; for \f, .ft, .B etc. */ +void +term_fontrepl(struct termp *p, enum termfont f) { - switch (msec) { - case(MSEC_1): - return("1"); - case(MSEC_2): - return("2"); - case(MSEC_3): - return("3"); - case(MSEC_3f): - return("3f"); - case(MSEC_3p): - return("3p"); - case(MSEC_4): - return("4"); - case(MSEC_5): - return("5"); - case(MSEC_6): - return("6"); - case(MSEC_7): - return("7"); - case(MSEC_8): - return("8"); - case(MSEC_9): - return("9"); - case(MSEC_X11): - return("X11"); - case(MSEC_X11R6): - return("X11R6"); - case(MSEC_local): - return("local"); - case(MSEC_n): - return("n"); - case(MSEC_unass): - /* FALLTHROUGH */ - case(MSEC_draft): - return("draft"); - case(MSEC_paper): - return("paper"); - default: - break; + p->fontl = p->fontq[p->fonti]; + p->fontq[p->fonti] = f; +} + +/* Set font, save previous. */ +void +term_fontpush(struct termp *p, enum termfont f) +{ + + p->fontl = p->fontq[p->fonti]; + if (++p->fonti == p->fontsz) { + p->fontsz += 8; + p->fontq = mandoc_reallocarray(p->fontq, + p->fontsz, sizeof(*p->fontq)); } - return(NULL); + p->fontq[p->fonti] = f; } +/* Flush to make the saved pointer current again. */ +void +term_fontpopq(struct termp *p, int i) +{ -static size_t -ttitle2a(char *dst, enum mdoc_vol vol, enum mdoc_msec msec, - enum mdoc_arch arch, size_t sz) + assert(i >= 0); + if (p->fonti > i) + p->fonti = i; +} + +/* Pop one font off the stack. */ +void +term_fontpop(struct termp *p) { - char *p; - size_t ssz; - if (NULL == (p = vol2a(vol))) - switch (msec) { - case (MSEC_1): - /* FALLTHROUGH */ - case (MSEC_6): - /* FALLTHROUGH */ - case (MSEC_7): - p = vol2a(VOL_URM); + assert(p->fonti); + p->fonti--; +} + +/* + * Handle pwords, partial words, which may be either a single word or a + * phrase that cannot be broken down (such as a literal string). This + * handles word styling. + */ +void +term_word(struct termp *p, const char *word) +{ + struct roffsu su; + const char nbrsp[2] = { ASCII_NBRSP, 0 }; + const char *seq, *cp; + int sz, uc; + size_t csz, lsz, ssz; + enum mandoc_esc esc; + + if ((p->flags & TERMP_NOBUF) == 0) { + if ((p->flags & TERMP_NOSPACE) == 0) { + if ((p->flags & TERMP_KEEP) == 0) { + bufferc(p, ' '); + if (p->flags & TERMP_SENTENCE) + bufferc(p, ' '); + } else + bufferc(p, ASCII_NBRSP); + } + if (p->flags & TERMP_PREKEEP) + p->flags |= TERMP_KEEP; + if (p->flags & TERMP_NONOSPACE) + p->flags |= TERMP_NOSPACE; + else + p->flags &= ~TERMP_NOSPACE; + p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE); + p->skipvsp = 0; + } + + while ('\0' != *word) { + if ('\\' != *word) { + if (TERMP_NBRWORD & p->flags) { + if (' ' == *word) { + encode(p, nbrsp, 1); + word++; + continue; + } + ssz = strcspn(word, "\\ "); + } else + ssz = strcspn(word, "\\"); + encode(p, word, ssz); + word += (int)ssz; + continue; + } + + word++; + esc = mandoc_escape(&word, &seq, &sz); + if (ESCAPE_ERROR == esc) + continue; + + switch (esc) { + case ESCAPE_UNICODE: + uc = mchars_num2uc(seq + 1, sz - 1); break; - case (MSEC_8): - p = vol2a(VOL_SMM); + case ESCAPE_NUMBERED: + uc = mchars_num2char(seq, sz); + if (uc < 0) + continue; break; - case (MSEC_2): - /* FALLTHROUGH */ - case (MSEC_3): - /* FALLTHROUGH */ - case (MSEC_4): - /* FALLTHROUGH */ - case (MSEC_5): - p = vol2a(VOL_PRM); - break; - case (MSEC_9): - p = vol2a(VOL_KM); - break; + case ESCAPE_SPECIAL: + if (p->enc == TERMENC_ASCII) { + cp = mchars_spec2str(seq, sz, &ssz); + if (cp != NULL) + encode(p, cp, ssz); + } else { + uc = mchars_spec2cp(seq, sz); + if (uc > 0) + encode1(p, uc); + } + continue; + case ESCAPE_FONTBOLD: + term_fontrepl(p, TERMFONT_BOLD); + continue; + case ESCAPE_FONTITALIC: + term_fontrepl(p, TERMFONT_UNDER); + continue; + case ESCAPE_FONTBI: + term_fontrepl(p, TERMFONT_BI); + continue; + case ESCAPE_FONT: + case ESCAPE_FONTROMAN: + term_fontrepl(p, TERMFONT_NONE); + continue; + case ESCAPE_FONTPREV: + term_fontlast(p); + continue; + case ESCAPE_BREAK: + bufferc(p, '\n'); + continue; + case ESCAPE_NOSPACE: + if (p->flags & TERMP_BACKAFTER) + p->flags &= ~TERMP_BACKAFTER; + else if (*word == '\0') + p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE); + continue; + case ESCAPE_HORIZ: + if (*seq == '|') { + seq++; + uc = -p->col; + } else + uc = 0; + if (a2roffsu(seq, &su, SCALE_EM) == NULL) + continue; + uc += term_hen(p, &su); + if (uc > 0) + while (uc-- > 0) + bufferc(p, ASCII_NBRSP); + else if (p->col > (size_t)(-uc)) + p->col += uc; + else { + uc += p->col; + p->col = 0; + if (p->tcol->offset > (size_t)(-uc)) { + p->ti += uc; + p->tcol->offset += uc; + } else { + p->ti -= p->tcol->offset; + p->tcol->offset = 0; + } + } + continue; + case ESCAPE_HLINE: + if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL) + continue; + uc = term_hen(p, &su); + if (uc <= 0) { + if (p->tcol->rmargin <= p->tcol->offset) + continue; + lsz = p->tcol->rmargin - p->tcol->offset; + } else + lsz = uc; + if (*cp == seq[-1]) + uc = -1; + else if (*cp == '\\') { + seq = cp + 1; + esc = mandoc_escape(&seq, &cp, &sz); + switch (esc) { + case ESCAPE_UNICODE: + uc = mchars_num2uc(cp + 1, sz - 1); + break; + case ESCAPE_NUMBERED: + uc = mchars_num2char(cp, sz); + break; + case ESCAPE_SPECIAL: + uc = mchars_spec2cp(cp, sz); + break; + default: + uc = -1; + break; + } + } else + uc = *cp; + if (uc < 0x20 || (uc > 0x7E && uc < 0xA0)) + uc = '_'; + if (p->enc == TERMENC_ASCII) { + cp = ascii_uc2str(uc); + csz = term_strlen(p, cp); + ssz = strlen(cp); + } else + csz = (*p->width)(p, uc); + while (lsz >= csz) { + if (p->enc == TERMENC_ASCII) + encode(p, cp, ssz); + else + encode1(p, uc); + lsz -= csz; + } + continue; + case ESCAPE_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->tcol->lastcol > 2 && + (p->tcol->buf[p->tcol->lastcol - 1] == ' ' || + p->tcol->buf[p->tcol->lastcol - 1] == '\t')) + p->tcol->lastcol -= 2; + if (p->col > p->tcol->lastcol) + p->col = p->tcol->lastcol; + continue; default: - /* FIXME: capitalise. */ - if (NULL == (p = msec2a(msec))) - p = msec2a(MSEC_local); - break; + continue; } - assert(p); - if ((ssz = strlcpy(dst, p, sz)) >= sz) - return(ssz); + /* + * Common handling for Unicode and numbered + * character escape sequences. + */ - if ((p = arch2a(arch))) { - if ((ssz = strlcat(dst, " (", sz)) >= sz) - return(ssz); - if ((ssz = strlcat(dst, p, sz)) >= sz) - return(ssz); - if ((ssz = strlcat(dst, ")", sz)) >= sz) - return(ssz); + if (p->enc == TERMENC_ASCII) { + cp = ascii_uc2str(uc); + encode(p, cp, strlen(cp)); + } else { + if ((uc < 0x20 && uc != 0x09) || + (uc > 0x7E && uc < 0xA0)) + uc = 0xFFFD; + encode1(p, uc); + } } + p->flags &= ~TERMP_NBRWORD; +} - return(ssz); +static void +adjbuf(struct termp_col *c, size_t sz) +{ + if (c->maxcols == 0) + c->maxcols = 1024; + while (c->maxcols <= sz) + c->maxcols <<= 2; + c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf)); } +static void +bufferc(struct termp *p, char c) +{ + if (p->flags & TERMP_NOBUF) { + (*p->letter)(p, c); + return; + } + if (p->col + 1 >= p->tcol->maxcols) + adjbuf(p->tcol, p->col + 1); + if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP)) + p->tcol->buf[p->col] = c; + if (p->tcol->lastcol < ++p->col) + p->tcol->lastcol = p->col; +} -static int -termprint_r(size_t cols, size_t indent, const struct mdoc_node *node) +/* + * See encode(). + * Do this for a single (probably unicode) value. + * Does not check for non-decorated glyphs. + */ +static void +encode1(struct termp *p, int c) { + enum termfont f; - return(1); -} + if (p->flags & TERMP_NOBUF) { + (*p->letter)(p, c); + return; + } + if (p->col + 7 >= p->tcol->maxcols) + adjbuf(p->tcol, p->col + 7); + f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ? + p->fontq[p->fonti] : TERMFONT_NONE; + + if (p->flags & TERMP_BACKBEFORE) { + if (p->tcol->buf[p->col - 1] == ' ' || + p->tcol->buf[p->col - 1] == '\t') + p->col--; + else + p->tcol->buf[p->col++] = '\b'; + p->flags &= ~TERMP_BACKBEFORE; + } + if (f == TERMFONT_UNDER || f == TERMFONT_BI) { + p->tcol->buf[p->col++] = '_'; + p->tcol->buf[p->col++] = '\b'; + } + if (f == TERMFONT_BOLD || f == TERMFONT_BI) { + if (c == ASCII_HYPH) + p->tcol->buf[p->col++] = '-'; + else + p->tcol->buf[p->col++] = c; + p->tcol->buf[p->col++] = '\b'; + } + if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP)) + p->tcol->buf[p->col] = c; + if (p->tcol->lastcol < ++p->col) + p->tcol->lastcol = p->col; + if (p->flags & TERMP_BACKAFTER) { + p->flags |= TERMP_BACKBEFORE; + p->flags &= ~TERMP_BACKAFTER; + } +} + static void -termprint_tail(size_t cols, const struct mdoc_meta *meta) +encode(struct termp *p, const char *word, size_t sz) { - struct tm *tm; - char *buf, *os; - size_t sz, osz, ssz, i; + size_t i; - if (NULL == (buf = malloc(cols))) - err(1, "malloc"); - if (NULL == (os = malloc(cols))) - err(1, "malloc"); + if (p->flags & TERMP_NOBUF) { + for (i = 0; i < sz; i++) + (*p->letter)(p, word[i]); + return; + } - tm = localtime(&meta->date); - if (NULL == strftime(buf, cols, "%B %d, %Y", tm)) - err(1, "strftime"); + if (p->col + 2 + (sz * 5) >= p->tcol->maxcols) + adjbuf(p->tcol, p->col + 2 + (sz * 5)); - osz = strlcpy(os, meta->os, cols); + for (i = 0; i < sz; i++) { + if (ASCII_HYPH == word[i] || + isgraph((unsigned char)word[i])) + encode1(p, word[i]); + else { + if (p->tcol->lastcol <= p->col || + (word[i] != ' ' && word[i] != ASCII_NBRSP)) + p->tcol->buf[p->col] = word[i]; + p->col++; - sz = strlen(buf); - ssz = sz + osz + 1; + /* + * Postpone the effect of \z while handling + * an overstrike sequence from ascii_uc2str(). + */ - if (ssz > cols) { - ssz -= cols; - assert(ssz <= osz); - os[osz - ssz] = 0; - ssz = 1; - } else - ssz = cols - ssz + 1; + if (word[i] == '\b' && + (p->flags & TERMP_BACKBEFORE)) { + p->flags &= ~TERMP_BACKBEFORE; + p->flags |= TERMP_BACKAFTER; + } + } + } + if (p->tcol->lastcol < p->col) + p->tcol->lastcol = p->col; +} - printf("%s", os); - for (i = 0; i < ssz; i++) - printf(" "); +void +term_setwidth(struct termp *p, const char *wstr) +{ + struct roffsu su; + int iop, width; - printf("%s\n", buf); - - free(buf); - free(os); + iop = 0; + width = 0; + if (NULL != wstr) { + switch (*wstr) { + case '+': + iop = 1; + wstr++; + break; + case '-': + iop = -1; + wstr++; + break; + default: + break; + } + if (a2roffsu(wstr, &su, SCALE_MAX) != NULL) + width = term_hspan(p, &su); + else + iop = 0; + } + (*p->setwidth)(p, iop, width); } +size_t +term_len(const struct termp *p, size_t sz) +{ -static void -termprint_head(size_t cols, const struct mdoc_meta *meta) + return (*p->width)(p, ' ') * sz; +} + +static size_t +cond_width(const struct termp *p, int c, int *skip) { - char *msec, *buf, *title; - size_t ssz, tsz, ttsz, i; - if (NULL == (buf = malloc(cols))) - err(1, "malloc"); - if (NULL == (title = malloc(cols))) - err(1, "malloc"); + if (*skip) { + (*skip) = 0; + return 0; + } else + return (*p->width)(p, c); +} - /* Format the manual page header. */ +size_t +term_strlen(const struct termp *p, const char *cp) +{ + size_t sz, rsz, i; + int ssz, skip, uc; + const char *seq, *rhs; + enum mandoc_esc esc; + static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH, + ASCII_BREAK, '\0' }; - tsz = ttitle2a(buf, meta->vol, meta->msec, meta->arch, cols); - ttsz = strlcpy(title, meta->title, cols); + /* + * Account for escaped sequences within string length + * calculations. This follows the logic in term_word() as we + * must calculate the width of produced strings. + */ - if (NULL == (msec = msec2a(meta->msec))) - msec = ""; + sz = 0; + skip = 0; + while ('\0' != *cp) { + rsz = strcspn(cp, rej); + for (i = 0; i < rsz; i++) + sz += cond_width(p, *cp++, &skip); - ssz = (2 * (ttsz + 2 + strlen(msec))) + tsz + 2; + switch (*cp) { + case '\\': + cp++; + esc = mandoc_escape(&cp, &seq, &ssz); + if (ESCAPE_ERROR == esc) + continue; - if (ssz > cols) { - if ((ssz -= cols) % 2) - ssz++; - ssz /= 2; - - assert(ssz <= ttsz); - title[ttsz - ssz] = 0; - ssz = 1; - } else - ssz = ((cols - ssz) / 2) + 1; + rhs = NULL; - printf("%s(%s)", title, msec); + switch (esc) { + case ESCAPE_UNICODE: + uc = mchars_num2uc(seq + 1, ssz - 1); + break; + case ESCAPE_NUMBERED: + uc = mchars_num2char(seq, ssz); + if (uc < 0) + continue; + break; + case ESCAPE_SPECIAL: + if (p->enc == TERMENC_ASCII) { + rhs = mchars_spec2str(seq, ssz, &rsz); + if (rhs != NULL) + break; + } else { + uc = mchars_spec2cp(seq, ssz); + if (uc > 0) + sz += cond_width(p, uc, &skip); + } + continue; + 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; + } - for (i = 0; i < ssz; i++) - printf(" "); + /* + * Common handling for Unicode and numbered + * character escape sequences. + */ - printf("%s", buf); + if (rhs == NULL) { + if (p->enc == TERMENC_ASCII) { + rhs = ascii_uc2str(uc); + rsz = strlen(rhs); + } else { + if ((uc < 0x20 && uc != 0x09) || + (uc > 0x7E && uc < 0xA0)) + uc = 0xFFFD; + sz += cond_width(p, uc, &skip); + continue; + } + } - for (i = 0; i < ssz; i++) - printf(" "); + if (skip) { + skip = 0; + break; + } - printf("%s(%s)\n\n", title, msec); + /* + * Common handling for all escape sequences + * printing more than one character. + */ - free(title); - free(buf); + for (i = 0; i < rsz; i++) + sz += (*p->width)(p, *rhs++); + break; + case ASCII_NBRSP: + sz += cond_width(p, ' ', &skip); + cp++; + break; + case ASCII_HYPH: + sz += cond_width(p, '-', &skip); + cp++; + break; + default: + break; + } + } + + return sz; } - int -termprint(const struct mdoc_node *node, - const struct mdoc_meta *meta) +term_vspan(const struct termp *p, const struct roffsu *su) { - size_t cols; + double r; + int ri; - if (ERR == setupterm(NULL, STDOUT_FILENO, NULL)) - return(0); + switch (su->unit) { + case SCALE_BU: + r = su->scale / 40.0; + break; + case SCALE_CM: + r = su->scale * 6.0 / 2.54; + break; + case SCALE_FS: + r = su->scale * 65536.0 / 40.0; + break; + case SCALE_IN: + r = su->scale * 6.0; + break; + case SCALE_MM: + r = su->scale * 0.006; + break; + case SCALE_PC: + r = su->scale; + break; + case SCALE_PT: + r = su->scale / 12.0; + break; + case SCALE_EN: + case SCALE_EM: + r = su->scale * 0.6; + break; + case SCALE_VS: + r = su->scale; + break; + default: + abort(); + } + ri = r > 0.0 ? r + 0.4995 : r - 0.4995; + return ri < 66 ? ri : 1; +} - cols = columns < 60 ? 60 : (size_t)columns; +/* + * Convert a scaling width to basic units, rounding towards 0. + */ +int +term_hspan(const struct termp *p, const struct roffsu *su) +{ - termprint_head(cols, meta); - if ( ! termprint_r(cols, 0, node)) - return(0); - termprint_tail(cols, meta); - return(1); + return (*p->hspan)(p, su); } +/* + * Convert a scaling width to basic units, rounding to closest. + */ +int +term_hen(const struct termp *p, const struct roffsu *su) +{ + int bu; + if ((bu = (*p->hspan)(p, su)) >= 0) + return (bu + 11) / 24; + else + return -((-bu + 11) / 24); +}