996 lines
22 KiB
C
996 lines
22 KiB
C
/* $Id: term.c,v 1.274 2017/07/28 14:25:48 schwarze Exp $ */
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/*
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* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mandoc.h"
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#include "mandoc_aux.h"
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#include "out.h"
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#include "term.h"
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#include "main.h"
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static size_t cond_width(const struct termp *, int, int *);
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static void adjbuf(struct termp_col *, size_t);
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static void bufferc(struct termp *, char);
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static void encode(struct termp *, const char *, size_t);
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static void encode1(struct termp *, int);
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static void endline(struct termp *);
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void
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term_setcol(struct termp *p, size_t maxtcol)
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{
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if (maxtcol > p->maxtcol) {
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p->tcols = mandoc_recallocarray(p->tcols,
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p->maxtcol, maxtcol, sizeof(*p->tcols));
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p->maxtcol = maxtcol;
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}
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p->lasttcol = maxtcol - 1;
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p->tcol = p->tcols;
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}
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void
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term_free(struct termp *p)
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{
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for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
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free(p->tcol->buf);
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free(p->tcols);
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free(p->fontq);
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free(p);
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}
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void
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term_begin(struct termp *p, term_margin head,
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term_margin foot, const struct roff_meta *arg)
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{
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p->headf = head;
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p->footf = foot;
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p->argf = arg;
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(*p->begin)(p);
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}
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void
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term_end(struct termp *p)
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{
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(*p->end)(p);
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}
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/*
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* Flush a chunk of text. By default, break the output line each time
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* the right margin is reached, and continue output on the next line
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* at the same offset as the chunk itself. By default, also break the
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* output line at the end of the chunk.
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* The following flags may be specified:
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*
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* - TERMP_NOBREAK: Do not break the output line at the right margin,
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* but only at the max right margin. Also, do not break the output
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* line at the end of the chunk, such that the next call can pad to
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* the next column. However, if less than p->trailspace blanks,
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* which can be 0, 1, or 2, remain to the right margin, the line
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* will be broken.
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* - TERMP_BRTRSP: Consider trailing whitespace significant
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* when deciding whether the chunk fits or not.
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* - TERMP_BRIND: If the chunk does not fit and the output line has
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* to be broken, start the next line at the right margin instead
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* of at the offset. Used together with TERMP_NOBREAK for the tags
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* in various kinds of tagged lists.
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* - TERMP_HANG: Do not break the output line at the right margin,
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* append the next chunk after it even if this one is too long.
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* To be used together with TERMP_NOBREAK.
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* - TERMP_NOPAD: Start writing at the current position,
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* do not pad with blank characters up to the offset.
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*/
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void
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term_flushln(struct termp *p)
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{
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size_t vis; /* current visual position on output */
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size_t vbl; /* number of blanks to prepend to output */
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size_t vend; /* end of word visual position on output */
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size_t bp; /* visual right border position */
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size_t dv; /* temporary for visual pos calculations */
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size_t j; /* temporary loop index for p->tcol->buf */
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size_t jhy; /* last hyph before overflow w/r/t j */
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size_t maxvis; /* output position of visible boundary */
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int ntab; /* number of tabs to prepend */
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int breakline; /* after this word */
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vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
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0 : p->tcol->offset - p->viscol;
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if (p->minbl && vbl < p->minbl)
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vbl = p->minbl;
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maxvis = p->tcol->rmargin > p->viscol + vbl ?
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p->tcol->rmargin - p->viscol - vbl : 0;
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bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
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p->maxrmargin > p->viscol + vbl ?
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p->maxrmargin - p->viscol - vbl : 0;
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vis = vend = 0;
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if ((p->flags & TERMP_MULTICOL) == 0)
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p->tcol->col = 0;
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while (p->tcol->col < p->tcol->lastcol) {
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/*
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* Handle literal tab characters: collapse all
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* subsequent tabs into a single huge set of spaces.
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*/
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ntab = 0;
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while (p->tcol->col < p->tcol->lastcol &&
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p->tcol->buf[p->tcol->col] == '\t') {
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vend = term_tab_next(vis);
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vbl += vend - vis;
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vis = vend;
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ntab++;
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p->tcol->col++;
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}
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/*
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* Count up visible word characters. Control sequences
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* (starting with the CSI) aren't counted. A space
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* generates a non-printing word, which is valid (the
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* space is printed according to regular spacing rules).
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*/
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jhy = 0;
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breakline = 0;
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for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
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if (p->tcol->buf[j] == '\n') {
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if ((p->flags & TERMP_BRIND) == 0)
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breakline = 1;
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continue;
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}
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if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
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break;
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/* Back over the last printed character. */
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if (p->tcol->buf[j] == '\b') {
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assert(j);
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vend -= (*p->width)(p, p->tcol->buf[j - 1]);
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continue;
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}
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/* Regular word. */
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/* Break at the hyphen point if we overrun. */
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if (vend > vis && vend < bp &&
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(p->tcol->buf[j] == ASCII_HYPH||
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p->tcol->buf[j] == ASCII_BREAK))
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jhy = j;
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/*
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* Hyphenation now decided, put back a real
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* hyphen such that we get the correct width.
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*/
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if (p->tcol->buf[j] == ASCII_HYPH)
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p->tcol->buf[j] = '-';
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vend += (*p->width)(p, p->tcol->buf[j]);
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}
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/*
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* Find out whether we would exceed the right margin.
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* If so, break to the next line.
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*/
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if (vend > bp && jhy == 0 && vis > 0 &&
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(p->flags & TERMP_BRNEVER) == 0) {
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if (p->flags & TERMP_MULTICOL)
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return;
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endline(p);
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vend -= vis;
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/* Use pending tabs on the new line. */
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vbl = 0;
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while (ntab--)
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vbl = term_tab_next(vbl);
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/* Re-establish indentation. */
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if (p->flags & TERMP_BRIND)
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vbl += p->tcol->rmargin;
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else
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vbl += p->tcol->offset;
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maxvis = p->tcol->rmargin > vbl ?
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p->tcol->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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}
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/*
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* Write out the rest of the word.
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*/
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for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
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if (vend > bp && jhy > 0 && p->tcol->col > jhy)
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break;
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if (p->tcol->buf[p->tcol->col] == '\n')
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continue;
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if (p->tcol->buf[p->tcol->col] == '\t')
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break;
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if (p->tcol->buf[p->tcol->col] == ' ') {
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j = p->tcol->col;
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while (p->tcol->col < p->tcol->lastcol &&
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p->tcol->buf[p->tcol->col] == ' ')
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p->tcol->col++;
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dv = (p->tcol->col - j) * (*p->width)(p, ' ');
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vbl += dv;
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vend += dv;
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break;
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}
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if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
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vbl += (*p->width)(p, ' ');
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continue;
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}
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if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
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continue;
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/*
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* Now we definitely know there will be
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* printable characters to output,
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* so write preceding white space now.
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*/
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if (vbl) {
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(*p->advance)(p, vbl);
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p->viscol += vbl;
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vbl = 0;
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}
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(*p->letter)(p, p->tcol->buf[p->tcol->col]);
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if (p->tcol->buf[p->tcol->col] == '\b')
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p->viscol -= (*p->width)(p,
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p->tcol->buf[p->tcol->col - 1]);
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else
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p->viscol += (*p->width)(p,
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p->tcol->buf[p->tcol->col]);
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}
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vis = vend;
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if (breakline == 0)
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continue;
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/* Explicitly requested output line break. */
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if (p->flags & TERMP_MULTICOL)
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return;
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endline(p);
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breakline = 0;
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vis = vend = 0;
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/* Re-establish indentation. */
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vbl = p->tcol->offset;
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maxvis = p->tcol->rmargin > vbl ?
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p->tcol->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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}
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/*
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* If there was trailing white space, it was not printed;
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* so reset the cursor position accordingly.
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*/
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if (vis > vbl)
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vis -= vbl;
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else
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vis = 0;
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p->col = p->tcol->col = p->tcol->lastcol = 0;
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p->minbl = p->trailspace;
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p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
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if (p->flags & TERMP_MULTICOL)
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return;
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/* Trailing whitespace is significant in some columns. */
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if (vis && vbl && (TERMP_BRTRSP & p->flags))
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vis += vbl;
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/* If the column was overrun, break the line. */
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if ((p->flags & TERMP_NOBREAK) == 0 ||
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((p->flags & TERMP_HANG) == 0 &&
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vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
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endline(p);
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}
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static void
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endline(struct termp *p)
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{
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if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
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p->mc = NULL;
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p->flags &= ~TERMP_ENDMC;
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}
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if (p->mc != NULL) {
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if (p->viscol && p->maxrmargin >= p->viscol)
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(*p->advance)(p, p->maxrmargin - p->viscol + 1);
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p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
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term_word(p, p->mc);
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p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
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}
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p->viscol = 0;
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p->minbl = 0;
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(*p->endline)(p);
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}
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/*
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* A newline only breaks an existing line; it won't assert vertical
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* space. All data in the output buffer is flushed prior to the newline
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* assertion.
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*/
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void
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term_newln(struct termp *p)
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{
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p->flags |= TERMP_NOSPACE;
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if (p->tcol->lastcol || p->viscol)
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term_flushln(p);
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}
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/*
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* Asserts a vertical space (a full, empty line-break between lines).
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* Note that if used twice, this will cause two blank spaces and so on.
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* All data in the output buffer is flushed prior to the newline
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* assertion.
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*/
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void
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term_vspace(struct termp *p)
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{
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term_newln(p);
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p->viscol = 0;
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p->minbl = 0;
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if (0 < p->skipvsp)
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p->skipvsp--;
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else
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(*p->endline)(p);
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}
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/* Swap current and previous font; for \fP and .ft P */
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void
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term_fontlast(struct termp *p)
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{
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enum termfont f;
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f = p->fontl;
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p->fontl = p->fontq[p->fonti];
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p->fontq[p->fonti] = f;
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}
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/* Set font, save current, discard previous; for \f, .ft, .B etc. */
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void
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term_fontrepl(struct termp *p, enum termfont f)
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{
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p->fontl = p->fontq[p->fonti];
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p->fontq[p->fonti] = f;
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}
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/* Set font, save previous. */
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void
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term_fontpush(struct termp *p, enum termfont f)
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{
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p->fontl = p->fontq[p->fonti];
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if (++p->fonti == p->fontsz) {
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p->fontsz += 8;
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p->fontq = mandoc_reallocarray(p->fontq,
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p->fontsz, sizeof(*p->fontq));
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}
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p->fontq[p->fonti] = f;
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}
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/* Flush to make the saved pointer current again. */
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void
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term_fontpopq(struct termp *p, int i)
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{
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assert(i >= 0);
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if (p->fonti > i)
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p->fonti = i;
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}
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/* Pop one font off the stack. */
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void
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term_fontpop(struct termp *p)
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{
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assert(p->fonti);
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p->fonti--;
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}
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/*
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* Handle pwords, partial words, which may be either a single word or a
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* phrase that cannot be broken down (such as a literal string). This
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* handles word styling.
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*/
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void
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term_word(struct termp *p, const char *word)
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{
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struct roffsu su;
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const char nbrsp[2] = { ASCII_NBRSP, 0 };
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const char *seq, *cp;
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int sz, uc;
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size_t csz, lsz, ssz;
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enum mandoc_esc esc;
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if ((p->flags & TERMP_NOBUF) == 0) {
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if ((p->flags & TERMP_NOSPACE) == 0) {
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if ((p->flags & TERMP_KEEP) == 0) {
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bufferc(p, ' ');
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if (p->flags & TERMP_SENTENCE)
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bufferc(p, ' ');
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} else
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bufferc(p, ASCII_NBRSP);
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}
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if (p->flags & TERMP_PREKEEP)
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p->flags |= TERMP_KEEP;
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if (p->flags & TERMP_NONOSPACE)
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p->flags |= TERMP_NOSPACE;
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else
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p->flags &= ~TERMP_NOSPACE;
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p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
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p->skipvsp = 0;
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}
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while ('\0' != *word) {
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if ('\\' != *word) {
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if (TERMP_NBRWORD & p->flags) {
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if (' ' == *word) {
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encode(p, nbrsp, 1);
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word++;
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continue;
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}
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ssz = strcspn(word, "\\ ");
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} else
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ssz = strcspn(word, "\\");
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encode(p, word, ssz);
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word += (int)ssz;
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continue;
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}
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word++;
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esc = mandoc_escape(&word, &seq, &sz);
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if (ESCAPE_ERROR == esc)
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continue;
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switch (esc) {
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case ESCAPE_UNICODE:
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uc = mchars_num2uc(seq + 1, sz - 1);
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break;
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case ESCAPE_NUMBERED:
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uc = mchars_num2char(seq, sz);
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if (uc < 0)
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continue;
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break;
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case ESCAPE_SPECIAL:
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if (p->enc == TERMENC_ASCII) {
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cp = mchars_spec2str(seq, sz, &ssz);
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if (cp != NULL)
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encode(p, cp, ssz);
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} else {
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uc = mchars_spec2cp(seq, sz);
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if (uc > 0)
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encode1(p, uc);
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}
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continue;
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case ESCAPE_FONTBOLD:
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term_fontrepl(p, TERMFONT_BOLD);
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continue;
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case ESCAPE_FONTITALIC:
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term_fontrepl(p, TERMFONT_UNDER);
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continue;
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case ESCAPE_FONTBI:
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term_fontrepl(p, TERMFONT_BI);
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continue;
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case ESCAPE_FONT:
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case ESCAPE_FONTROMAN:
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term_fontrepl(p, TERMFONT_NONE);
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continue;
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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:
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Common handling for Unicode and numbered
|
|
* character escape sequences.
|
|
*/
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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
|
|
encode(struct termp *p, const char *word, size_t sz)
|
|
{
|
|
size_t i;
|
|
|
|
if (p->flags & TERMP_NOBUF) {
|
|
for (i = 0; i < sz; i++)
|
|
(*p->letter)(p, word[i]);
|
|
return;
|
|
}
|
|
|
|
if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
|
|
adjbuf(p->tcol, p->col + 2 + (sz * 5));
|
|
|
|
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++;
|
|
|
|
/*
|
|
* Postpone the effect of \z while handling
|
|
* an overstrike sequence from ascii_uc2str().
|
|
*/
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
term_setwidth(struct termp *p, const char *wstr)
|
|
{
|
|
struct roffsu su;
|
|
int iop, width;
|
|
|
|
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)
|
|
{
|
|
|
|
return (*p->width)(p, ' ') * sz;
|
|
}
|
|
|
|
static size_t
|
|
cond_width(const struct termp *p, int c, int *skip)
|
|
{
|
|
|
|
if (*skip) {
|
|
(*skip) = 0;
|
|
return 0;
|
|
} else
|
|
return (*p->width)(p, c);
|
|
}
|
|
|
|
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' };
|
|
|
|
/*
|
|
* Account for escaped sequences within string length
|
|
* calculations. This follows the logic in term_word() as we
|
|
* must calculate the width of produced strings.
|
|
*/
|
|
|
|
sz = 0;
|
|
skip = 0;
|
|
while ('\0' != *cp) {
|
|
rsz = strcspn(cp, rej);
|
|
for (i = 0; i < rsz; i++)
|
|
sz += cond_width(p, *cp++, &skip);
|
|
|
|
switch (*cp) {
|
|
case '\\':
|
|
cp++;
|
|
esc = mandoc_escape(&cp, &seq, &ssz);
|
|
if (ESCAPE_ERROR == esc)
|
|
continue;
|
|
|
|
rhs = NULL;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Common handling for Unicode and numbered
|
|
* character escape sequences.
|
|
*/
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (skip) {
|
|
skip = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Common handling for all escape sequences
|
|
* printing more than one character.
|
|
*/
|
|
|
|
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
|
|
term_vspan(const struct termp *p, const struct roffsu *su)
|
|
{
|
|
double r;
|
|
int ri;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Convert a scaling width to basic units, rounding towards 0.
|
|
*/
|
|
int
|
|
term_hspan(const struct termp *p, const struct roffsu *su)
|
|
{
|
|
|
|
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);
|
|
}
|