diff options
Diffstat (limited to 'term.c')
| -rw-r--r-- | term.c | 254 |
1 files changed, 235 insertions, 19 deletions
@@ -36,7 +36,15 @@ #include "mdoc.h" #include "main.h" -static struct termp *term_alloc(char *, enum termenc); +#define PS_CHAR_WIDTH 6 +#define PS_CHAR_HEIGHT 12 +#define PS_CHAR_TOPMARG (792 - 24) +#define PS_CHAR_TOP (PS_CHAR_TOPMARG - 36) +#define PS_CHAR_LEFT 36 +#define PS_CHAR_BOTMARG 24 +#define PS_CHAR_BOT (PS_CHAR_BOTMARG + 36) + +static struct termp *alloc(char *, enum termenc, enum termtype); static void term_free(struct termp *); static void spec(struct termp *, const char *, size_t); static void res(struct termp *, const char *, size_t); @@ -44,13 +52,25 @@ static void buffera(struct termp *, const char *, size_t); static void bufferc(struct termp *, char); static void adjbuf(struct termp *p, size_t); static void encode(struct termp *, const char *, size_t); +static void advance(struct termp *, size_t); +static void endline(struct termp *); +static void letter(struct termp *, char); +static void pageopen(struct termp *); void * ascii_alloc(char *outopts) { - return(term_alloc(outopts, TERMENC_ASCII)); + return(alloc(outopts, TERMENC_ASCII, TERMTYPE_CHAR)); +} + + +void * +ps_alloc(void) +{ + + return(alloc(NULL, TERMENC_ASCII, TERMTYPE_PS)); } @@ -70,13 +90,207 @@ term_free(struct termp *p) free(p->buf); if (p->symtab) chars_free(p->symtab); - free(p); } +/* + * Push a single letter into our output engine. + */ +static void +letter(struct termp *p, char c) +{ + + if (TERMTYPE_CHAR == p->type) { + /* + * If using the terminal device, just push the letter + * out into the screen. + */ + putchar(c); + return; + } + + if ( ! (PS_INLINE & p->psstate)) { + /* + * If we're not in a PostScript "word" context, then + * open one now at the current cursor. + */ + printf("%zu %zu moveto\n", p->pscol, p->psrow); + putchar('('); + p->psstate |= PS_INLINE; + } + + /* + * We need to escape these characters as per the PostScript + * specification. We would also escape non-graphable characters + * (like tabs), but none of them would get to this point and + * it's superfluous to abort() on them. + */ + + switch (c) { + case ('('): + /* FALLTHROUGH */ + case (')'): + /* FALLTHROUGH */ + case ('\\'): + putchar('\\'); + break; + default: + break; + } + + /* Write the character and adjust where we are on the page. */ + putchar(c); + p->pscol += PS_CHAR_WIDTH; +} + + +/* + * Begin a "terminal" context. Since terminal encompasses PostScript, + * the actual terminal, etc., there are a few things we can do here. + */ +void +term_begin(struct termp *p, term_margin head, + term_margin foot, const void *arg) +{ + + p->headf = head; + p->footf = foot; + p->argf = arg; + + if (TERMTYPE_CHAR == p->type) { + /* Emit the header and be done. */ + (*p->headf)(p, p->argf); + return; + } + + /* + * Emit the standard PostScript prologue, set our initial page + * position, then run pageopen() on the initial page. + */ + + printf("%s\n", "%!PS"); + printf("%s\n", "/Courier"); + printf("%s\n", "10 selectfont"); + + p->pspage = 1; + p->psstate = 0; + pageopen(p); +} + + +/* + * Open a page. This is only used for -Tps at the moment. It opens a + * page context, printing the header and the footer. THE OUTPUT BUFFER + * MUST BE EMPTY. If it is not, output will ghost on the next line and + * we'll be all gross and out of state. + */ +static void +pageopen(struct termp *p) +{ + + assert(TERMTYPE_PS == p->type); + assert(0 == p->psstate); + + p->pscol = PS_CHAR_LEFT; + p->psrow = PS_CHAR_TOPMARG; + p->psstate |= PS_MARGINS; + + (*p->headf)(p, p->argf); + endline(p); + + p->psstate &= ~PS_MARGINS; + assert(0 == p->psstate); + + p->pscol = PS_CHAR_LEFT; + p->psrow = PS_CHAR_BOTMARG; + p->psstate |= PS_MARGINS; + + (*p->footf)(p, p->argf); + endline(p); + + p->psstate &= ~PS_MARGINS; + assert(0 == p->psstate); + + p->pscol = PS_CHAR_LEFT; + p->psrow = PS_CHAR_TOP; + +} + + +void +term_end(struct termp *p) +{ + + if (TERMTYPE_CHAR == p->type) { + (*p->footf)(p, p->argf); + return; + } + + printf("%s\n", "%%END"); +} + + +static void +endline(struct termp *p) +{ + + if (TERMTYPE_CHAR == p->type) { + putchar('\n'); + return; + } + + if (PS_INLINE & p->psstate) { + printf(") show\n"); + p->psstate &= ~PS_INLINE; + } + + if (PS_MARGINS & p->psstate) + return; + + p->pscol = PS_CHAR_LEFT; + if (p->psrow >= PS_CHAR_HEIGHT + PS_CHAR_BOT) { + p->psrow -= PS_CHAR_HEIGHT; + return; + } + + /* + * XXX: can't run pageopen() until we're certain a flushln() has + * occured, else the buf will reopen in an awkward state on the + * next line. + */ + printf("showpage\n"); + p->psrow = PS_CHAR_TOP; +} + + +/* + * Advance the output engine by a certain amount of whitespace. + */ +static void +advance(struct termp *p, size_t len) +{ + size_t i; + + if (TERMTYPE_CHAR == p->type) { + /* Just print whitespace on the terminal. */ + for (i = 0; i < len; i++) + putchar(' '); + return; + } + + if (PS_INLINE & p->psstate) { + /* Dump out any existing line scope. */ + printf(") show\n"); + p->psstate &= ~PS_INLINE; + } + + p->pscol += len ? len * PS_CHAR_WIDTH : 0; +} + + static struct termp * -term_alloc(char *outopts, enum termenc enc) +alloc(char *outopts, enum termenc enc, enum termtype type) { struct termp *p; const char *toks[2]; @@ -92,8 +306,10 @@ term_alloc(char *outopts, enum termenc enc) exit(EXIT_FAILURE); } + p->type = type; p->tabwidth = 5; p->enc = enc; + width = 80; while (outopts && *outopts) @@ -228,11 +444,10 @@ term_flushln(struct termp *p) */ if (vend > bp && 0 == jhy && vis > 0) { vend -= vis; - putchar('\n'); + endline(p); if (TERMP_NOBREAK & p->flags) { p->viscol = p->rmargin; - for (j = 0; j < (int)p->rmargin; j++) - putchar(' '); + advance(p, p->rmargin); vend += p->rmargin - p->offset; } else { p->viscol = 0; @@ -276,16 +491,15 @@ term_flushln(struct termp *p) * so write preceding white space now. */ if (vbl) { - for (j = 0; j < (int)vbl; j++) - putchar(' '); + advance(p, vbl); p->viscol += vbl; vbl = 0; } if (ASCII_HYPH == p->buf[i]) - putchar('-'); + letter(p, '-'); else - putchar(p->buf[i]); + letter(p, p->buf[i]); p->viscol += 1; } @@ -298,7 +512,7 @@ term_flushln(struct termp *p) if ( ! (TERMP_NOBREAK & p->flags)) { p->viscol = 0; - putchar('\n'); + endline(p); return; } @@ -331,13 +545,12 @@ term_flushln(struct termp *p) if (maxvis > vis + /* LINTED */ ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) { p->viscol += maxvis - vis; - for ( ; vis < maxvis; vis++) - putchar(' '); + advance(p, maxvis - vis); + vis += (maxvis - vis); } else { /* ...or newline break. */ - putchar('\n'); + endline(p); p->viscol = p->rmargin; - for (i = 0; i < (int)p->rmargin; i++) - putchar(' '); + advance(p, p->rmargin); } } @@ -373,7 +586,7 @@ term_vspace(struct termp *p) term_newln(p); p->viscol = 0; - putchar('\n'); + endline(p); } @@ -625,7 +838,10 @@ encode(struct termp *p, const char *word, size_t sz) * character by character. */ - if (TERMFONT_NONE == (f = term_fonttop(p))) { + if (TERMTYPE_PS == p->type) { + buffera(p, word, sz); + return; + } else if (TERMFONT_NONE == (f = term_fonttop(p))) { buffera(p, word, sz); return; } |