-/* $Id: term.c,v 1.84 2009/07/14 15:16:41 kristaps Exp $ */
+/* $Id: term.c,v 1.273 2017/06/14 23:24:18 schwarze Exp $ */
/*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
*
* 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
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#include "config.h"
+
+#include <sys/types.h>
+
#include <assert.h>
-#include <err.h>
+#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include "mandoc.h"
+#include "mandoc_aux.h"
+#include "out.h"
#include "term.h"
-#include "man.h"
-#include "mdoc.h"
-
-extern int man_run(struct termp *,
- const struct man *);
-extern int mdoc_run(struct termp *,
- const struct mdoc *);
-
-static struct termp *term_alloc(enum termenc);
-static void term_free(struct termp *);
-static void term_pword(struct termp *, const char *, int);
-static void term_pescape(struct termp *,
- const char *, int *, int);
-static void term_nescape(struct termp *,
- const char *, size_t);
-static void term_chara(struct termp *, char);
-static void term_encodea(struct termp *, char);
-static int term_isopendelim(const char *, int);
-static int term_isclosedelim(const char *, int);
-
-
-void *
-ascii_alloc(void)
-{
-
- return(term_alloc(TERMENC_ASCII));
-}
-
-
-int
-terminal_man(void *arg, const struct man *man)
-{
- struct termp *p;
+#include "main.h"
- p = (struct termp *)arg;
- if (NULL == p->symtab)
- p->symtab = term_ascii2htab();
-
- return(man_run(p, man));
-}
-
-
-int
-terminal_mdoc(void *arg, const struct mdoc *mdoc)
-{
- struct termp *p;
-
- p = (struct termp *)arg;
- if (NULL == p->symtab)
- p->symtab = term_ascii2htab();
-
- return(mdoc_run(p, mdoc));
-}
+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 *);
void
-terminal_free(void *arg)
+term_setcol(struct termp *p, size_t maxtcol)
{
-
- term_free((struct termp *)arg);
+ 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 void
+void
term_free(struct termp *p)
{
-
- if (p->buf)
- free(p->buf);
- if (TERMENC_ASCII == p->enc && p->symtab)
- term_asciifree(p->symtab);
-
+ 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);
}
-
-static struct termp *
-term_alloc(enum termenc enc)
-{
- struct termp *p;
-
- if (NULL == (p = malloc(sizeof(struct termp))))
- err(1, "malloc");
- bzero(p, sizeof(struct termp));
- p->maxrmargin = 78;
- p->enc = enc;
- return(p);
-}
-
-
-static int
-term_isclosedelim(const char *p, int len)
+void
+term_begin(struct termp *p, term_margin head,
+ term_margin foot, const struct roff_meta *arg)
{
- if (1 != len)
- return(0);
-
- switch (*p) {
- case('.'):
- /* FALLTHROUGH */
- case(','):
- /* FALLTHROUGH */
- case(';'):
- /* FALLTHROUGH */
- case(':'):
- /* FALLTHROUGH */
- case('?'):
- /* FALLTHROUGH */
- case('!'):
- /* FALLTHROUGH */
- case(')'):
- /* FALLTHROUGH */
- case(']'):
- /* FALLTHROUGH */
- case('}'):
- return(1);
- default:
- break;
- }
-
- return(0);
+ p->headf = head;
+ p->footf = foot;
+ p->argf = arg;
+ (*p->begin)(p);
}
-
-static int
-term_isopendelim(const char *p, int len)
+void
+term_end(struct termp *p)
{
- if (1 != len)
- return(0);
-
- switch (*p) {
- case('('):
- /* FALLTHROUGH */
- case('['):
- /* FALLTHROUGH */
- case('{'):
- return(1);
- default:
- break;
- }
-
- return(0);
+ (*p->end)(p);
}
-
/*
- * Flush a line of text. A "line" is loosely defined as being something
- * that should be followed by a newline, regardless of whether it's
- * broken apart by newlines getting there. A line can also be a
- * fragment of a columnar list.
- *
- * Specifically, a line is whatever's in p->buf of length p->col, which
- * is zeroed after this function returns.
+ * 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:
*
- * The usage of termp:flags is as follows:
- *
- * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
- * offset value. This is useful when doing columnar lists where the
- * prior column has right-padded.
- *
- * - TERMP_NOBREAK: this is the most important and is used when making
- * columns. In short: don't print a newline and instead pad to the
- * right margin. Used in conjunction with TERMP_NOLPAD.
- *
- * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
- * the line is overrun, and don't pad-right if it's underrun.
- *
- * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
- * overruning, instead save the position and continue at that point
- * when the next invocation.
- *
- * In-line line breaking:
- *
- * If TERMP_NOBREAK is specified and the line overruns the right
- * margin, it will break and pad-right to the right margin after
- * writing. If maxrmargin is violated, it will break and continue
- * writing from the right-margin, which will lead to the above
- * scenario upon exit.
- *
- * Otherwise, the line will break at the right margin. Extremely long
- * lines will cause the system to emit a warning (TODO: hyphenate, if
- * possible).
- *
- * FIXME: newline breaks occur (in groff) also occur when a single
- * space follows a NOBREAK!
+ * - 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)
{
- int i, j;
- size_t vbl, vsz, vis, maxvis, mmax, bp;
- static int sv = -1;
+ 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) {
- /*
- * First, establish the maximum columns of "visible" content.
- * This is usually the difference between the right-margin and
- * an indentation, but can be, for tagged lists or columns, a
- * small set of values.
- */
-
- assert(p->offset < p->rmargin);
- maxvis = p->rmargin - p->offset;
- mmax = p->maxrmargin - p->offset;
- bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
- vis = 0;
-
- if (sv >= 0) {
- vis = (size_t)sv;
- sv = -1;
- }
-
- /*
- * If in the standard case (left-justified), then begin with our
- * indentation, otherwise (columns, etc.) just start spitting
- * out text.
- */
+ /*
+ * Handle literal tab characters: collapse all
+ * subsequent tabs into a single huge set of spaces.
+ */
- if ( ! (p->flags & TERMP_NOLPAD))
- /* LINTED */
- for (j = 0; j < (int)p->offset; j++)
- putchar(' ');
+ 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++;
+ }
- for (i = 0; i < (int)p->col; i++) {
/*
* Count up visible word characters. Control sequences
* (starting with the CSI) aren't counted. A space
* space is printed according to regular spacing rules).
*/
- /* LINTED */
- for (j = i, vsz = 0; j < (int)p->col; j++) {
- if (' ' == p->buf[j])
+ 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;
- else if (8 == p->buf[j])
- j += 1;
- else
- vsz++;
- }
- /*
- * Choose the number of blanks to prepend: no blank at the
- * beginning of a line, one between words -- but do not
- * actually write them yet.
- */
- vbl = (size_t)(0 == vis ? 0 : 1);
+ /* 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. (TODO: hyphenate)
- * Otherwise, write the chosen number of blanks now.
+ * If so, break to the next line.
*/
- if (vis && vis + vbl + vsz > bp) {
- putchar('\n');
- if (TERMP_NOBREAK & p->flags) {
- for (j = 0; j < (int)p->rmargin; j++)
- putchar(' ');
- vis = p->rmargin - p->offset;
- } else {
- for (j = 0; j < (int)p->offset; j++)
- putchar(' ');
- vis = 0;
- }
- } else {
- for (j = 0; j < (int)vbl; j++)
- putchar(' ');
- vis += vbl;
+
+ 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;
}
/*
- * Finally, write out the word.
+ * Write out the rest of the word.
*/
- for ( ; i < (int)p->col; i++) {
- if (' ' == p->buf[i])
+
+ 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;
- putchar(p->buf[i]);
+ 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 += vsz;
+ 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;
}
/*
- * If we've overstepped our maximum visible no-break space, then
- * cause a newline and offset at the right margin.
+ * If there was trailing white space, it was not printed;
+ * so reset the cursor position accordingly.
*/
- if ((TERMP_NOBREAK & p->flags) && vis >= maxvis) {
- if ( ! (TERMP_DANGLE & p->flags) &&
- ! (TERMP_HANG & p->flags)) {
- putchar('\n');
- for (i = 0; i < (int)p->rmargin; i++)
- putchar(' ');
- }
- if (TERMP_HANG & p->flags)
- sv = vis - maxvis;
- p->col = 0;
+ 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;
- }
- /*
- * If we're not to right-marginalise it (newline), then instead
- * pad to the right margin and stay off.
- */
+ /* Trailing whitespace is significant in some columns. */
- if (p->flags & TERMP_NOBREAK) {
- if ( ! (TERMP_DANGLE & p->flags))
- for ( ; vis < maxvis; vis++)
- putchar(' ');
- } else
- putchar('\n');
+ if (vis && vbl && (TERMP_BRTRSP & p->flags))
+ vis += vbl;
- p->col = 0;
+ /* 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);
+}
-/*
+/*
* 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.
{
p->flags |= TERMP_NOSPACE;
- if (0 == p->col) {
- p->flags &= ~TERMP_NOLPAD;
- return;
- }
- term_flushln(p);
- p->flags &= ~TERMP_NOLPAD;
+ if (p->tcol->lastcol || p->viscol)
+ term_flushln(p);
}
-
/*
* 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.
{
term_newln(p);
- putchar('\n');
+ 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;
+
+ 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)
+{
+
+ 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));
+ }
+ p->fontq[p->fonti] = f;
+}
+
+/* Flush to make the saved pointer current again. */
+void
+term_fontpopq(struct termp *p, int i)
+{
+
+ assert(i >= 0);
+ if (p->fonti > i)
+ p->fonti = i;
+}
+
+/* Pop one font off the stack. */
+void
+term_fontpop(struct termp *p)
+{
+
+ assert(p->fonti);
+ p->fonti--;
+}
/*
- * Break apart a word into "pwords" (partial-words, usually from
- * breaking up a phrase into individual words) and, eventually, put them
- * into the output buffer. If we're a literal word, then don't break up
- * the word and put it verbatim into the output buffer.
+ * 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)
{
- int i, j, len;
+ 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;
+ }
- len = (int)strlen(word);
+ 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;
+ }
- if (p->flags & TERMP_LITERAL) {
- term_pword(p, word, len);
- return;
- }
+ word++;
+ esc = mandoc_escape(&word, &seq, &sz);
+ if (ESCAPE_ERROR == esc)
+ continue;
- /* LINTED */
- for (j = i = 0; i < len; i++) {
- if (' ' != word[i]) {
- j++;
+ switch (esc) {
+ case ESCAPE_UNICODE:
+ uc = mchars_num2uc(seq + 1, sz - 1);
+ break;
+ case ESCAPE_NUMBERED:
+ uc = mchars_num2char(seq, sz);
+ if (uc < 0)
+ continue;
+ 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;
- }
-
- /* Escaped spaces don't delimit... */
- if (i && ' ' == word[i] && '\\' == word[i - 1]) {
- j++;
+ 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:
continue;
}
- if (0 == j)
- continue;
- assert(i >= j);
- term_pword(p, &word[i - j], j);
- j = 0;
- }
- if (j > 0) {
- assert(i >= j);
- term_pword(p, &word[i - j], j);
+ /*
+ * 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;
}
-
-/*
- * Determine the symbol indicated by an escape sequences, that is, one
- * starting with a backslash. Once done, we pass this value into the
- * output buffer by way of the symbol table.
- */
static void
-term_nescape(struct termp *p, const char *word, size_t len)
+adjbuf(struct termp_col *c, size_t sz)
{
- const char *rhs;
- size_t sz;
- int i;
-
- rhs = term_a2ascii(p->symtab, word, len, &sz);
- if (rhs)
- for (i = 0; i < (int)sz; i++)
- term_encodea(p, rhs[i]);
+ 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;
+}
/*
- * Handle an escape sequence: determine its length and pass it to the
- * escape-symbol look table. Note that we assume mdoc(3) has validated
- * the escape sequence (we assert upon badly-formed escape sequences).
+ * See encode().
+ * Do this for a single (probably unicode) value.
+ * Does not check for non-decorated glyphs.
*/
static void
-term_pescape(struct termp *p, const char *word, int *i, int len)
+encode1(struct termp *p, int c)
{
- int j;
+ enum termfont f;
- if (++(*i) >= len)
+ if (p->flags & TERMP_NOBUF) {
+ (*p->letter)(p, c);
return;
+ }
- if ('(' == word[*i]) {
- (*i)++;
- if (*i + 1 >= len)
- return;
+ if (p->col + 7 >= p->tcol->maxcols)
+ adjbuf(p->tcol, p->col + 7);
- term_nescape(p, &word[*i], 2);
- (*i)++;
- return;
+ f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
+ p->fontq[p->fonti] : TERMFONT_NONE;
- } else if ('*' == word[*i]) {
- (*i)++;
- if (*i >= len)
- return;
+ 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;
+ }
+}
- switch (word[*i]) {
- case ('('):
- (*i)++;
- if (*i + 1 >= len)
- return;
+static void
+encode(struct termp *p, const char *word, size_t sz)
+{
+ size_t i;
- term_nescape(p, &word[*i], 2);
- (*i)++;
- return;
- case ('['):
- break;
- default:
- term_nescape(p, &word[*i], 1);
- return;
+ 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;
+ }
}
-
- } else if ('f' == word[*i]) {
- (*i)++;
- if (*i >= len)
- return;
- switch (word[*i]) {
- case ('B'):
- p->flags |= TERMP_BOLD;
- break;
- case ('I'):
- p->flags |= TERMP_UNDER;
+ }
+ 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 ('P'):
- /* FALLTHROUGH */
- case ('R'):
- p->flags &= ~TERMP_STYLE;
+ case '-':
+ iop = -1;
+ wstr++;
break;
default:
break;
}
- return;
-
- } else if ('[' != word[*i]) {
- term_nescape(p, &word[*i], 1);
- return;
+ if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
+ width = term_hspan(p, &su);
+ else
+ iop = 0;
}
+ (*p->setwidth)(p, iop, width);
+}
- (*i)++;
- for (j = 0; word[*i] && ']' != word[*i]; (*i)++, j++)
- /* Loop... */ ;
-
- if (0 == word[*i])
- return;
+size_t
+term_len(const struct termp *p, size_t sz)
+{
- term_nescape(p, &word[*i - j], (size_t)j);
+ return (*p->width)(p, ' ') * sz;
}
+static size_t
+cond_width(const struct termp *p, int c, int *skip)
+{
-/*
- * 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.
- */
-static void
-term_pword(struct termp *p, const char *word, int len)
+ if (*skip) {
+ (*skip) = 0;
+ return 0;
+ } else
+ return (*p->width)(p, c);
+}
+
+size_t
+term_strlen(const struct termp *p, const char *cp)
{
- int i;
+ 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' };
- if (term_isclosedelim(word, len))
- if ( ! (TERMP_IGNDELIM & p->flags))
- p->flags |= TERMP_NOSPACE;
+ /*
+ * 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 ( ! (TERMP_NOSPACE & p->flags))
- term_chara(p, ' ');
+ 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;
+ }
- if ( ! (p->flags & TERMP_NONOSPACE))
- p->flags &= ~TERMP_NOSPACE;
+ /*
+ * 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 ANSI (word-length styling), then apply our style now,
- * before the word.
- */
+ if (skip) {
+ skip = 0;
+ break;
+ }
- for (i = 0; i < len; i++)
- if ('\\' == word[i])
- term_pescape(p, word, &i, len);
- else
- term_encodea(p, word[i]);
+ /*
+ * Common handling for all escape sequences
+ * printing more than one character.
+ */
- if (term_isopendelim(word, len))
- p->flags |= TERMP_NOSPACE;
+ 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;
+}
/*
- * Insert a single character into the line-buffer. If the buffer's
- * space is exceeded, then allocate more space by doubling the buffer
- * size.
+ * Convert a scaling width to basic units, rounding towards 0.
*/
-static void
-term_chara(struct termp *p, char c)
+int
+term_hspan(const struct termp *p, const struct roffsu *su)
{
- size_t s;
-
- if (p->col + 1 >= p->maxcols) {
- if (0 == p->maxcols)
- p->maxcols = 256;
- s = p->maxcols * 2;
- p->buf = realloc(p->buf, s);
- if (NULL == p->buf)
- err(1, "realloc");
- p->maxcols = s;
- }
- p->buf[(int)(p->col)++] = c;
-}
+ return (*p->hspan)(p, su);
+}
-static void
-term_encodea(struct termp *p, char c)
+/*
+ * Convert a scaling width to basic units, rounding to closest.
+ */
+int
+term_hen(const struct termp *p, const struct roffsu *su)
{
+ int bu;
- if (TERMP_STYLE & p->flags) {
- if (TERMP_BOLD & p->flags) {
- term_chara(p, c);
- term_chara(p, 8);
- }
- if (TERMP_UNDER & p->flags) {
- term_chara(p, '_');
- term_chara(p, 8);
- }
- }
- term_chara(p, c);
+ if ((bu = (*p->hspan)(p, su)) >= 0)
+ return (bu + 11) / 24;
+ else
+ return -((-bu + 11) / 24);
}
git.ckatri.com / mandoc.git / blobdiff