ref: 603ad1a37d08437b3a51a0f62b88834c4a7611ab
dir: /wb.c/
/* word buffer */
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "roff.h"
/* the current font, size and color */
#define R_F(wb) ((wb)->r_f >= 0 ? (wb)->r_f : n_f) /* current font */
#define R_S(wb) ((wb)->r_s >= 0 ? (wb)->r_s : n_s) /* current size */
#define R_M(wb) ((wb)->r_m >= 0 ? (wb)->r_m : n_m) /* current color */
/* italic correction */
#define glyph_ic(g) (MAX(0, (g)->urx - (g)->wid))
#define glyph_icleft(g) (MAX(0, -(g)->llx))
/* the maximum and minimum values of bounding box coordinates */
#define BBMAX (1 << 29)
#define BBMIN -BBMAX
static void wb_flushsub(struct wb *wb);
void wb_init(struct wb *wb)
{
memset(wb, 0, sizeof(*wb));
sbuf_init(&wb->sbuf);
wb->sub_collect = 1;
wb->f = -1;
wb->s = -1;
wb->m = -1;
wb->r_f = -1;
wb->r_s = -1;
wb->r_m = -1;
wb->llx = BBMAX;
wb->lly = BBMAX;
wb->urx = BBMIN;
wb->ury = BBMIN;
}
void wb_done(struct wb *wb)
{
sbuf_done(&wb->sbuf);
}
/* update wb->st and wb->sb */
static void wb_stsb(struct wb *wb)
{
wb->st = MIN(wb->st, wb->v - (wb->s * SC_IN / 72));
wb->sb = MAX(wb->sb, wb->v);
}
/* update bounding box */
static void wb_bbox(struct wb *wb, int llx, int lly, int urx, int ury)
{
wb->llx = MIN(wb->llx, wb->h + llx);
wb->lly = MIN(wb->lly, -wb->v + lly);
wb->urx = MAX(wb->urx, wb->h + urx);
wb->ury = MAX(wb->ury, -wb->v + ury);
}
/* pending font, size or color changes */
static int wb_pendingfont(struct wb *wb)
{
return wb->f != R_F(wb) || wb->s != R_S(wb) ||
(!n_cp && wb->m != R_M(wb));
}
/* append font and size to the buffer if needed */
static void wb_flushfont(struct wb *wb)
{
if (wb->f != R_F(wb)) {
sbuf_printf(&wb->sbuf, "%cf(%02d", c_ec, R_F(wb));
wb->f = R_F(wb);
}
if (wb->s != R_S(wb)) {
sbuf_printf(&wb->sbuf, "%cs(%02d", c_ec, R_S(wb));
wb->s = R_S(wb);
}
if (!n_cp && wb->m != R_M(wb)) {
sbuf_printf(&wb->sbuf, "%cm[%s]", c_ec, clr_str(R_M(wb)));
wb->m = R_M(wb);
}
wb_stsb(wb);
}
/* apply font and size changes and flush the collected subword */
static void wb_flush(struct wb *wb)
{
wb_flushsub(wb);
wb_flushfont(wb);
}
void wb_hmov(struct wb *wb, int n)
{
wb_flushsub(wb);
wb->h += n;
sbuf_printf(&wb->sbuf, "%ch'%du'", c_ec, n);
}
void wb_vmov(struct wb *wb, int n)
{
wb_flushsub(wb);
wb->v += n;
sbuf_printf(&wb->sbuf, "%cv'%du'", c_ec, n);
}
void wb_els(struct wb *wb, int els)
{
wb_flushsub(wb);
if (els > wb->els_pos)
wb->els_pos = els;
if (els < wb->els_neg)
wb->els_neg = els;
sbuf_printf(&wb->sbuf, "%cx'%du'", c_ec, els);
}
void wb_etc(struct wb *wb, char *x)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cX%s", c_ec, x);
}
static void wb_putbuf(struct wb *wb, char *c)
{
struct glyph *g;
int zerowidth;
if (c[0] == '\t' || c[0] == '' ||
(c[0] == c_ni && (c[1] == '\t' || c[1] == ''))) {
sbuf_append(&wb->sbuf, c);
return;
}
g = dev_glyph(c, wb->f);
zerowidth = !strcmp(c_hc, c) || !strcmp(c_bp, c);
if (!g && c[0] == c_ec && !zerowidth) { /* unknown escape */
memmove(c, c + 1, strlen(c));
g = dev_glyph(c, wb->f);
}
if (g && !zerowidth && wb->icleft && glyph_icleft(g))
wb_hmov(wb, font_wid(g->font, wb->s, glyph_icleft(g)));
wb->icleft = 0;
if (!c[1] || c[0] == c_ec || c[0] == c_ni || utf8one(c)) {
if (c[0] == c_ni && c[1] == c_ec)
sbuf_printf(&wb->sbuf, "%c%c", c_ec, c_ec);
else
sbuf_append(&wb->sbuf, c);
} else {
if (c[1] && !c[2])
sbuf_printf(&wb->sbuf, "%c(%s", c_ec, c);
else
sbuf_printf(&wb->sbuf, "%cC'%s'", c_ec, c);
}
if (!zerowidth) {
if (!n_cp && g)
wb_bbox(wb, font_wid(g->font, wb->s, g->llx),
font_wid(g->font, wb->s, g->lly),
font_wid(g->font, wb->s, g->urx),
font_wid(g->font, wb->s, g->ury));
wb->h += g ? font_gwid(g->font, dev_font(wb->f), wb->s, g->wid) : 0;
wb->ct |= g ? g->type : 0;
wb_stsb(wb);
}
}
int c_dash(char *c)
{
return !strcmp("-", c) || !strcmp("em", c) || !strcmp("hy", c);
}
/* return nonzero if it cannot be hyphenated */
static int wb_hyph(char src[][GNLEN], int src_n, char *src_hyph, int flg)
{
char word[WORDLEN * GNLEN]; /* word to pass to hyphenate() */
char hyph[WORDLEN * GNLEN]; /* hyphenation points of word */
int smap[WORDLEN]; /* the mapping from src[] to word[] */
char *s, *d;
int i;
d = word;
*d = '\0';
for (i = 0; i < src_n; i++) {
s = src[i];
smap[i] = d - word;
if (c_dash(s) || !strcmp(c_hc, s))
return 1;
if (!strcmp(c_bp, s))
continue;
if (!utf8one(s) || (!s[1] && !isalpha((unsigned char) s[0])))
strcpy(d, ".");
else
strcpy(d, s);
d = strchr(d, '\0');
}
memset(hyph, 0, (d - word) * sizeof(hyph[0]));
hyphenate(hyph, word, flg);
for (i = 0; i < src_n; i++)
src_hyph[i] = hyph[smap[i]];
return 0;
}
static int wb_collect(struct wb *wb, int val)
{
int old = wb->sub_collect;
wb->sub_collect = val;
return old;
}
static void wb_flushsub(struct wb *wb)
{
struct font *fn;
struct glyph *gsrc[WORDLEN];
struct glyph *gdst[WORDLEN];
int x[WORDLEN], y[WORDLEN], xadv[WORDLEN], yadv[WORDLEN];
int dmap[WORDLEN];
char src_hyph[WORDLEN];
int dst_n, i;
if (!wb->sub_n || !wb->sub_collect)
return;
wb->sub_collect = 0;
fn = dev_font(wb->f);
if (!n_hy || wb_hyph(wb->sub_c, wb->sub_n, src_hyph, n_hy))
memset(src_hyph, 0, sizeof(src_hyph));
for (i = 0; i < wb->sub_n; i++)
gsrc[i] = font_find(fn, wb->sub_c[i]);
dst_n = font_layout(fn, gsrc, wb->sub_n, wb->s,
gdst, dmap, x, y, xadv, yadv, n_lg, n_kn);
for (i = 0; i < dst_n; i++) {
if (x[i])
wb_hmov(wb, font_wid(fn, wb->s, x[i]));
if (y[i])
wb_vmov(wb, font_wid(fn, wb->s, y[i]));
if (src_hyph[dmap[i]])
wb_putbuf(wb, c_hc);
if (gdst[i] == gsrc[dmap[i]])
wb_putbuf(wb, wb->sub_c[dmap[i]]);
else
wb_putbuf(wb, gdst[i]->name);
if (x[i] || xadv[i])
wb_hmov(wb, font_wid(fn, wb->s, xadv[i] - x[i]));
if (y[i] || yadv[i])
wb_vmov(wb, font_wid(fn, wb->s, yadv[i] - y[i]));
}
wb->sub_n = 0;
wb->icleft = 0;
wb->sub_collect = 1;
}
void wb_put(struct wb *wb, char *c)
{
if (c[0] == '\n') {
wb->part = 0;
return;
}
if (c[0] == ' ') {
wb_flushsub(wb);
wb_hmov(wb, font_swid(dev_font(R_F(wb)), R_S(wb), n_ss));
return;
}
if (wb_pendingfont(wb) || wb->sub_n == LEN(wb->sub_c))
wb_flush(wb);
if (wb->sub_collect) {
if (font_find(dev_font(wb->f), c))
strcpy(wb->sub_c[wb->sub_n++], c);
else
wb_putraw(wb, c);
} else {
wb_putbuf(wb, c);
}
}
/* just like wb_put() but disable subword collection */
void wb_putraw(struct wb *wb, char *c)
{
int collect;
wb_flushsub(wb);
collect = wb_collect(wb, 0);
wb_put(wb, c);
wb_collect(wb, collect);
}
/* just like wb_put(), but call cdef_expand() if c is defined */
void wb_putexpand(struct wb *wb, char *c)
{
if (cdef_expand(wb, c, R_F(wb)))
wb_put(wb, c);
}
int wb_part(struct wb *wb)
{
return wb->part;
}
void wb_setpart(struct wb *wb)
{
wb->part = 1;
}
void wb_drawl(struct wb *wb, int c, int h, int v)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cD'%c %du %du'", c_ec, c, h, v);
wb->h += h;
wb->v += v;
wb_stsb(wb);
}
void wb_drawc(struct wb *wb, int c, int r)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cD'%c %du'", c_ec, c, r);
wb->h += r;
}
void wb_drawe(struct wb *wb, int c, int h, int v)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cD'%c %du %du'", c_ec, c, h, v);
wb->h += h;
}
void wb_drawa(struct wb *wb, int c, int h1, int v1, int h2, int v2)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cD'%c %du %du %du %du'",
c_ec, c, h1, v1, h2, v2);
wb->h += h1 + h2;
wb->v += v1 + v2;
wb_stsb(wb);
}
void wb_drawxbeg(struct wb *wb, int c)
{
wb_flush(wb);
sbuf_printf(&wb->sbuf, "%cD'%c", c_ec, c);
}
void wb_drawxdot(struct wb *wb, int h, int v)
{
sbuf_printf(&wb->sbuf, " %du %du", h, v);
wb->h += h;
wb->v += v;
wb_stsb(wb);
}
void wb_drawxend(struct wb *wb)
{
sbuf_printf(&wb->sbuf, "'");
}
void wb_reset(struct wb *wb)
{
wb_done(wb);
wb_init(wb);
}
char *wb_buf(struct wb *wb)
{
wb_flushsub(wb);
return sbuf_buf(&wb->sbuf);
}
static void wb_putc(struct wb *wb, int t, char *s)
{
if (t && t != 'C')
wb_flushsub(wb);
switch (t) {
case 0:
case 'C':
wb_put(wb, s);
break;
case 'D':
ren_dcmd(wb, s);
break;
case 'f':
wb->r_f = atoi(s);
break;
case 'h':
wb_hmov(wb, atoi(s));
break;
case 'm':
wb->r_m = clr_get(s);
break;
case 's':
wb->r_s = atoi(s);
break;
case 'v':
wb_vmov(wb, atoi(s));
break;
case 'x':
wb_els(wb, atoi(s));
break;
case 'X':
wb_etc(wb, s);
break;
}
}
void wb_cat(struct wb *wb, struct wb *src)
{
char *s;
char d[ILNLEN];
int c, part;
int collect;
wb_flushsub(src);
wb_flushsub(wb);
collect = wb_collect(wb, 0);
s = sbuf_buf(&src->sbuf);
while ((c = escread(&s, d)) >= 0)
wb_putc(wb, c, d);
part = src->part;
wb->r_s = -1;
wb->r_f = -1;
wb->r_m = -1;
wb_reset(src);
src->part = part;
wb_collect(wb, collect);
}
int wb_wid(struct wb *wb)
{
wb_flushsub(wb);
return wb->h;
}
int wb_hpos(struct wb *wb)
{
wb_flushsub(wb);
return wb->h;
}
int wb_vpos(struct wb *wb)
{
wb_flushsub(wb);
return wb->v;
}
int wb_empty(struct wb *wb)
{
return !wb->sub_n && sbuf_empty(&wb->sbuf);
}
/* return 1 if wb ends a sentence (.?!) */
int wb_eos(struct wb *wb)
{
int i = wb->sub_n - 1;
while (i > 0 && c_eostran(wb->sub_c[i]))
i--;
return i >= 0 && c_eossent(wb->sub_c[i]);
}
void wb_wconf(struct wb *wb, int *ct, int *st, int *sb,
int *llx, int *lly, int *urx, int *ury)
{
wb_flushsub(wb);
*ct = wb->ct;
*st = -wb->st;
*sb = -wb->sb;
*llx = wb->llx < BBMAX ? wb->llx : 0;
*lly = wb->lly < BBMAX ? -wb->lly : 0;
*urx = wb->urx > BBMIN ? wb->urx : 0;
*ury = wb->ury > BBMIN ? -wb->ury : 0;
}
static struct glyph *wb_prevglyph(struct wb *wb)
{
return wb->sub_n ? dev_glyph(wb->sub_c[wb->sub_n - 1], wb->f) : NULL;
}
void wb_italiccorrection(struct wb *wb)
{
struct glyph *g = wb_prevglyph(wb);
if (g && glyph_ic(g))
wb_hmov(wb, font_wid(g->font, wb->s, glyph_ic(g)));
}
void wb_italiccorrectionleft(struct wb *wb)
{
wb_flushsub(wb);
wb->icleft = 1;
}
void wb_fnszget(struct wb *wb, int *fn, int *sz, int *m)
{
wb_flushsub(wb);
*fn = wb->r_f;
*sz = wb->r_s;
*m = wb->r_m;
}
void wb_fnszset(struct wb *wb, int fn, int sz, int m)
{
wb->r_f = fn;
wb->r_s = sz;
wb->r_m = m;
}
void wb_catstr(struct wb *wb, char *s, char *end)
{
char d[ILNLEN];
int collect, c;
wb_flushsub(wb);
collect = wb_collect(wb, 0);
while (s < end && (c = escread(&s, d)) >= 0)
wb_putc(wb, c, d);
wb_collect(wb, collect);
}
/* return the size of \(hy if appended to wb */
int wb_dashwid(struct wb *wb)
{
struct glyph *g = dev_glyph("hy", wb->f);
return g ? font_gwid(g->font, dev_font(wb->f), wb->s, g->wid) : 0;
}