43341922 |
1 | /* |
2 | * PDF backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
9 | #define TREE_BRANCH 2 /* max branching factor in page tree */ |
10 | |
11 | paragraph *pdf_config_filename(char *filename) |
12 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("pdf-filename", filename, NULL); |
43341922 |
14 | } |
15 | |
16 | typedef struct object_Tag object; |
17 | typedef struct objlist_Tag objlist; |
18 | |
19 | struct object_Tag { |
20 | objlist *list; |
21 | object *next; |
22 | int number; |
23 | rdstringc main, stream; |
24 | int size, fileoff; |
25 | char *final; |
26 | }; |
27 | |
28 | struct objlist_Tag { |
29 | int number; |
30 | object *head, *tail; |
31 | }; |
32 | |
33 | static object *new_object(objlist *list); |
34 | static void objtext(object *o, char const *text); |
35 | static void objstream(object *o, char const *text); |
7c8c4239 |
36 | static void pdf_string(void (*add)(object *, char const *), |
37 | object *, char const *); |
ce1b04aa |
38 | static void pdf_string_len(void (*add)(object *, char const *), |
39 | object *, char const *, int); |
43341922 |
40 | static void objref(object *o, object *dest); |
41 | |
42 | static void make_pages_node(object *node, object *parent, page_data *first, |
43 | page_data *last, object *resources); |
f0e51ce1 |
44 | static int make_outline(object *parent, outline_element *start, int n, |
45 | int open); |
09358aa7 |
46 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
47 | |
48 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
49 | indexdata *idx, void *vdoc) { |
50 | document *doc = (document *)vdoc; |
51 | int font_index; |
52 | font_encoding *fe; |
53 | page_data *page; |
54 | int pageno; |
55 | FILE *fp; |
56 | char *filename; |
57 | paragraph *p; |
58 | objlist olist; |
59 | object *o, *cat, *outlines, *pages, *resources; |
60 | int fileoff; |
61 | |
62 | IGNORE(keywords); |
63 | IGNORE(idx); |
64 | |
65 | filename = dupstr("output.pdf"); |
66 | for (p = sourceform; p; p = p->next) { |
43341922 |
67 | if (p->type == para_Config && p->parent) { |
68 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
69 | sfree(filename); |
e4ea58f8 |
70 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
71 | } |
72 | } |
73 | } |
74 | |
75 | olist.head = olist.tail = NULL; |
76 | olist.number = 1; |
77 | |
78 | cat = new_object(&olist); |
79 | outlines = new_object(&olist); |
80 | pages = new_object(&olist); |
81 | resources = new_object(&olist); |
82 | |
83 | /* |
43341922 |
84 | * The catalogue just contains references to the outlines and |
85 | * pages objects. |
86 | */ |
87 | objtext(cat, "<<\n/Type /Catalog\n/Outlines "); |
88 | objref(cat, outlines); |
89 | objtext(cat, "\n/Pages "); |
90 | objref(cat, pages); |
f0e51ce1 |
91 | objtext(cat, "\n/PageMode /UseOutlines\n>>\n"); |
43341922 |
92 | |
93 | /* |
94 | * Set up the resources dictionary, which mostly means |
95 | * providing all the font objects and names to call them by. |
96 | */ |
97 | font_index = 0; |
98 | objtext(resources, "<<\n/Font <<\n"); |
99 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
100 | char fname[40]; |
101 | int i; |
102 | object *font; |
103 | |
104 | sprintf(fname, "f%d", font_index++); |
105 | fe->name = dupstr(fname); |
106 | |
107 | font = new_object(&olist); |
108 | |
109 | objtext(resources, "/"); |
110 | objtext(resources, fe->name); |
111 | objtext(resources, " "); |
112 | objref(resources, font); |
113 | objtext(resources, "\n"); |
114 | |
115 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
116 | objtext(font, fe->name); |
117 | objtext(font, "\n/BaseFont /"); |
118 | objtext(font, fe->font->name); |
119 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
120 | |
121 | for (i = 0; i < 256; i++) { |
122 | char buf[20]; |
123 | if (!fe->vector[i]) |
124 | continue; |
125 | sprintf(buf, "\n%d /", i); |
126 | objtext(font, buf); |
127 | objtext(font, fe->vector[i] ? fe->vector[i] : ".notdef"); |
128 | } |
129 | |
130 | objtext(font, "\n]\n>>\n"); |
131 | |
132 | { |
133 | object *widths = new_object(&olist); |
134 | objtext(font, "/FirstChar 0\n/LastChar 255\n/Widths "); |
135 | objref(font, widths); |
136 | objtext(font, "\n"); |
137 | objtext(widths, "[\n"); |
138 | for (i = 0; i < 256; i++) { |
139 | char buf[80]; |
140 | double width; |
141 | if (fe->indices[i] < 0) |
142 | width = 0.0; |
143 | else |
144 | width = fe->font->widths[fe->indices[i]]; |
145 | sprintf(buf, "%g\n", 1000.0 * width / 4096.0); |
146 | objtext(widths, buf); |
147 | } |
148 | objtext(widths, "]\n"); |
149 | } |
150 | |
151 | objtext(font, ">>\n"); |
152 | } |
153 | objtext(resources, ">>\n>>\n"); |
154 | |
155 | /* |
156 | * Define the page objects for each page, and get each one |
157 | * ready to have a `Parent' specification added to it. |
158 | */ |
159 | for (page = doc->pages; page; page = page->next) { |
160 | object *opage; |
161 | |
162 | opage = new_object(&olist); |
163 | page->spare = opage; |
164 | objtext(opage, "<<\n/Type /Page\n"); |
165 | } |
166 | |
167 | /* |
168 | * Recursively build the page tree. |
169 | */ |
170 | make_pages_node(pages, NULL, doc->pages, NULL, resources); |
171 | |
172 | /* |
173 | * Create and render the individual pages. |
174 | */ |
175 | pageno = 0; |
176 | for (page = doc->pages; page; page = page->next) { |
177 | object *opage, *cstr; |
23765aeb |
178 | rect *r; |
7c8c4239 |
179 | text_fragment *frag, *frag_end; |
43341922 |
180 | char buf[256]; |
7c8c4239 |
181 | int x, y, lx, ly; |
43341922 |
182 | |
183 | opage = (object *)page->spare; |
184 | /* |
185 | * At this point the page dictionary is already |
186 | * half-written, with /Type and /Parent already present. We |
187 | * continue from there. |
188 | */ |
189 | |
190 | /* |
191 | * The PDF spec says /Resources is required, but also says |
192 | * that it's inheritable and may be omitted if it's present |
193 | * in a Pages node. In our case it is: it's present in the |
194 | * topmost /Pages node because we carefully put it there. |
195 | * So we don't need a /Resources entry here. |
196 | */ |
197 | sprintf(buf, "/MediaBox [0 0 %g %g]\n", |
198 | doc->paper_width / 4096.0, doc->paper_height / 4096.0); |
199 | objtext(opage, buf); |
200 | |
201 | /* |
202 | * Now we're ready to define a content stream containing |
203 | * the actual text on the page. |
204 | */ |
205 | cstr = new_object(&olist); |
206 | objtext(opage, "/Contents "); |
207 | objref(opage, cstr); |
208 | objtext(opage, "\n"); |
209 | |
23765aeb |
210 | /* |
211 | * Render any rectangles on the page. |
212 | */ |
213 | for (r = page->first_rect; r; r = r->next) { |
214 | char buf[512]; |
215 | sprintf(buf, "%g %g %g %g re f\n", r->x / 4096.0, |
216 | r->y / 4096.0, r->w / 4096.0, r->h / 4096.0); |
217 | objstream(cstr, buf); |
218 | } |
219 | |
43341922 |
220 | objstream(cstr, "BT\n"); |
43341922 |
221 | |
7c8c4239 |
222 | /* |
223 | * PDF tracks two separate current positions: the position |
224 | * given in the `line matrix' and the position given in the |
225 | * `text matrix'. We must therefore track both as well. |
226 | * They start off at -1 (unset). |
227 | */ |
228 | lx = ly = -1; |
229 | x = y = -1; |
230 | |
231 | frag = page->first_text; |
232 | while (frag) { |
233 | /* |
234 | * For compactness, I'm going to group text fragments |
235 | * into subsequences that use the same font+size. So |
236 | * first find the end of this subsequence. |
237 | */ |
238 | for (frag_end = frag; |
239 | (frag_end && |
240 | frag_end->fe == frag->fe && |
241 | frag_end->fontsize == frag->fontsize); |
242 | frag_end = frag_end->next); |
243 | |
244 | /* |
245 | * Now select the text fragment, and prepare to display |
246 | * the text. |
247 | */ |
43341922 |
248 | objstream(cstr, "/"); |
249 | objstream(cstr, frag->fe->name); |
7c8c4239 |
250 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
251 | objstream(cstr, buf); |
252 | |
7c8c4239 |
253 | while (frag && frag != frag_end) { |
254 | /* |
255 | * Place the text position for the first piece of |
256 | * text. |
257 | */ |
258 | if (lx < 0) { |
259 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
260 | frag->x/4096.0, frag->y/4096.0); |
261 | } else { |
262 | sprintf(buf, "%g %g Td ", |
263 | (frag->x - lx)/4096.0, (frag->y - ly)/4096.0); |
264 | } |
43341922 |
265 | objstream(cstr, buf); |
7c8c4239 |
266 | lx = x = frag->x; |
267 | ly = y = frag->y; |
268 | |
269 | /* |
270 | * See if we're going to use Tj (show a single |
271 | * string) or TJ (show an array of strings with |
272 | * x-spacings between them). We determine this by |
273 | * seeing if there's more than one text fragment in |
274 | * sequence with the same y-coordinate. |
275 | */ |
276 | if (frag->next && frag->next != frag_end && |
277 | frag->next->y == y) { |
278 | /* |
279 | * The TJ strategy. |
280 | */ |
281 | objstream(cstr, "["); |
282 | while (frag && frag != frag_end && frag->y == y) { |
283 | if (frag->x != x) { |
284 | sprintf(buf, "%g", |
285 | (x - frag->x) * 1000.0 / |
286 | (4096.0 * frag->fontsize)); |
287 | objstream(cstr, buf); |
288 | } |
289 | pdf_string(objstream, cstr, frag->text); |
290 | x = frag->x + frag->width; |
291 | frag = frag->next; |
292 | } |
293 | objstream(cstr, "]TJ\n"); |
294 | } else |
295 | { |
296 | /* |
297 | * The Tj strategy. |
298 | */ |
299 | pdf_string(objstream, cstr, frag->text); |
300 | objstream(cstr, "Tj\n"); |
301 | frag = frag->next; |
302 | } |
43341922 |
303 | } |
43341922 |
304 | } |
305 | objstream(cstr, "ET"); |
306 | |
138d7ffb |
307 | /* |
308 | * Also, we want an annotation dictionary containing the |
309 | * cross-references from this page. |
310 | */ |
311 | if (page->first_xref) { |
312 | xref *xr; |
313 | objtext(opage, "/Annots [\n"); |
314 | |
315 | for (xr = page->first_xref; xr; xr = xr->next) { |
316 | object *annot; |
317 | char buf[256]; |
318 | |
319 | annot = new_object(&olist); |
320 | objref(opage, annot); |
321 | objtext(opage, "\n"); |
322 | |
323 | objtext(annot, "<<\n/Type /Annot\n/Subtype /Link\n/Rect ["); |
324 | sprintf(buf, "%g %g %g %g", |
325 | xr->lx / 4096.0, xr->by / 4096.0, |
326 | xr->rx / 4096.0, xr->ty / 4096.0); |
327 | objtext(annot, buf); |
328 | objtext(annot, "]\n/Border [0 0 0]\n"); |
329 | |
330 | if (xr->dest.type == PAGE) { |
331 | objtext(annot, "/Dest ["); |
332 | objref(annot, (object *)xr->dest.page->spare); |
333 | objtext(annot, " /XYZ null null null]\n"); |
334 | } else { |
7c8c4239 |
335 | objtext(annot, "/A <<\n/Type /Action\n/S /URI\n/URI "); |
336 | pdf_string(objtext, annot, xr->dest.url); |
337 | objtext(annot, "\n>>\n"); |
138d7ffb |
338 | } |
339 | |
340 | objtext(annot, ">>\n"); |
341 | } |
342 | |
343 | objtext(opage, "]\n"); |
344 | } |
345 | |
43341922 |
346 | objtext(opage, ">>\n"); |
347 | } |
348 | |
349 | /* |
f0e51ce1 |
350 | * Set up the outlines dictionary. |
351 | */ |
352 | { |
353 | int topcount; |
354 | char buf[80]; |
355 | |
356 | objtext(outlines, "<<\n/Type /Outlines\n"); |
357 | topcount = make_outline(outlines, doc->outline_elements, |
358 | doc->n_outline_elements, TRUE); |
359 | sprintf(buf, "/Count %d\n>>\n", topcount); |
360 | objtext(outlines, buf); |
361 | } |
362 | |
363 | /* |
43341922 |
364 | * Assemble the final linear form of every object. |
365 | */ |
366 | for (o = olist.head; o; o = o->next) { |
367 | rdstringc rs = {0, 0, NULL}; |
368 | char text[80]; |
369 | |
370 | sprintf(text, "%d 0 obj\n", o->number); |
371 | rdaddsc(&rs, text); |
372 | |
373 | if (!o->main.text && o->stream.text) { |
374 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
375 | rdaddsc(&o->main, text); |
376 | } |
377 | |
378 | assert(o->main.text); |
379 | rdaddsc(&rs, o->main.text); |
380 | sfree(o->main.text); |
381 | |
382 | if (rs.text[rs.pos-1] != '\n') |
383 | rdaddc(&rs, '\n'); |
384 | |
385 | if (o->stream.text) { |
386 | /* |
387 | * FIXME: If we ever start compressing stream data then |
388 | * it will have zero bytes in it, so we'll have to be |
389 | * more careful than this. |
390 | */ |
391 | rdaddsc(&rs, "stream\n"); |
392 | rdaddsc(&rs, o->stream.text); |
393 | rdaddsc(&rs, "\nendstream\n"); |
394 | sfree(o->stream.text); |
395 | } |
396 | |
397 | rdaddsc(&rs, "endobj\n"); |
398 | |
399 | o->final = rs.text; |
400 | o->size = rs.pos; |
401 | } |
402 | |
403 | /* |
404 | * Write out the PDF file. |
405 | */ |
406 | |
407 | fp = fopen(filename, "wb"); |
408 | if (!fp) { |
409 | error(err_cantopenw, filename); |
410 | return; |
411 | } |
412 | |
413 | /* |
09358aa7 |
414 | * Header. I'm going to put the version IDs in the header as |
415 | * well, simply in PDF comments. |
43341922 |
416 | */ |
417 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
418 | for (p = sourceform; p; p = p->next) |
419 | if (p->type == para_VersionID) |
420 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
421 | |
422 | /* |
423 | * Body |
424 | */ |
425 | for (o = olist.head; o; o = o->next) { |
426 | o->fileoff = fileoff; |
427 | fwrite(o->final, 1, o->size, fp); |
428 | fileoff += o->size; |
429 | } |
430 | |
431 | /* |
432 | * Cross-reference table |
433 | */ |
434 | fprintf(fp, "xref\n"); |
435 | assert(olist.head->number == 1); |
436 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
437 | fprintf(fp, "0000000000 65535 f \n"); |
438 | for (o = olist.head; o; o = o->next) { |
439 | char entry[40]; |
440 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
441 | assert(strlen(entry) == 20); |
442 | fputs(entry, fp); |
443 | } |
444 | |
445 | /* |
446 | * Trailer |
447 | */ |
448 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n>>\n", |
449 | olist.tail->number + 1, cat->number); |
450 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
451 | |
452 | fclose(fp); |
453 | |
454 | sfree(filename); |
455 | } |
456 | |
457 | static object *new_object(objlist *list) |
458 | { |
459 | object *obj = mknew(object); |
460 | |
461 | obj->list = list; |
462 | |
463 | obj->main.text = NULL; |
464 | obj->main.pos = obj->main.size = 0; |
465 | obj->stream.text = NULL; |
466 | obj->stream.pos = obj->stream.size = 0; |
467 | |
468 | obj->number = list->number++; |
469 | |
470 | obj->next = NULL; |
471 | if (list->tail) |
472 | list->tail->next = obj; |
473 | else |
474 | list->head = obj; |
475 | list->tail = obj; |
476 | |
477 | obj->size = 0; |
478 | obj->final = NULL; |
479 | |
480 | return obj; |
481 | } |
482 | |
483 | static void objtext(object *o, char const *text) |
484 | { |
485 | rdaddsc(&o->main, text); |
486 | } |
487 | |
488 | static void objstream(object *o, char const *text) |
489 | { |
490 | rdaddsc(&o->stream, text); |
491 | } |
492 | |
493 | static void objref(object *o, object *dest) |
494 | { |
495 | char buf[40]; |
496 | sprintf(buf, "%d 0 R", dest->number); |
497 | rdaddsc(&o->main, buf); |
498 | } |
499 | |
500 | static void make_pages_node(object *node, object *parent, page_data *first, |
501 | page_data *last, object *resources) |
502 | { |
503 | int count; |
504 | page_data *page; |
505 | char buf[80]; |
506 | |
507 | objtext(node, "<<\n/Type /Pages\n"); |
508 | if (parent) { |
509 | objtext(node, "/Parent "); |
510 | objref(node, parent); |
511 | objtext(node, "\n"); |
512 | } |
513 | |
514 | /* |
515 | * Count the pages in this stretch, to see if there are few |
516 | * enough to reference directly. |
517 | */ |
518 | count = 0; |
519 | for (page = first; page; page = page->next) { |
520 | count++; |
521 | if (page == last) |
522 | break; |
523 | } |
524 | |
525 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
526 | objtext(node, buf); |
527 | |
528 | if (count > TREE_BRANCH) { |
529 | int i; |
530 | page_data *thisfirst, *thislast; |
531 | |
532 | page = first; |
533 | |
534 | for (i = 0; i < TREE_BRANCH; i++) { |
535 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
536 | thisfirst = page; |
537 | while (number--) { |
538 | thislast = page; |
539 | page = page->next; |
540 | } |
541 | |
542 | if (thisfirst == thislast) { |
543 | objref(node, (object *)thisfirst->spare); |
544 | objtext((object *)thisfirst->spare, "/Parent "); |
545 | objref((object *)thisfirst->spare, node); |
546 | objtext((object *)thisfirst->spare, "\n"); |
547 | } else { |
548 | object *newnode = new_object(node->list); |
549 | make_pages_node(newnode, node, thisfirst, thislast, NULL); |
550 | objref(node, newnode); |
551 | } |
552 | objtext(node, "\n"); |
553 | } |
554 | |
555 | assert(thislast == last || page == NULL); |
556 | |
557 | } else { |
558 | for (page = first; page; page = page->next) { |
559 | objref(node, (object *)page->spare); |
560 | objtext(node, "\n"); |
561 | objtext((object *)page->spare, "/Parent "); |
562 | objref((object *)page->spare, node); |
563 | objtext((object *)page->spare, "\n"); |
564 | if (page == last) |
565 | break; |
566 | } |
567 | } |
568 | |
569 | objtext(node, "]\n"); |
570 | |
571 | if (resources) { |
572 | objtext(node, "/Resources "); |
573 | objref(node, resources); |
574 | objtext(node, "\n"); |
575 | } |
576 | |
577 | objtext(node, ">>\n"); |
578 | } |
f0e51ce1 |
579 | |
580 | /* |
581 | * In text on the page, PDF uses the PostScript font model, which |
582 | * means that glyphs are identified by PS strings and hence font |
583 | * encoding can be managed independently of the supplied encoding |
584 | * of the font. However, in the document outline, the PDF spec |
ce1b04aa |
585 | * encodes in either PDFDocEncoding (a custom superset of |
586 | * ISO-8859-1) or UTF-16BE. |
f0e51ce1 |
587 | */ |
ce1b04aa |
588 | static char *pdf_outline_convert(wchar_t *s, int *len) { |
589 | char *ret; |
590 | |
591 | ret = utoa_careful_dup(s, CS_PDF); |
592 | |
593 | /* |
594 | * Very silly special case: if the returned string begins with |
595 | * FE FF, then the PDF reader will mistake it for a UTF-16BE |
596 | * string. So in this case we give up on PDFDocEncoding and |
597 | * encode it in UTF-16 straight away. |
598 | */ |
599 | if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') { |
600 | sfree(ret); |
601 | ret = NULL; |
f0e51ce1 |
602 | } |
ce1b04aa |
603 | |
604 | if (!ret) { |
605 | ret = utoa_dup_len(s, CS_UTF16BE, len); |
606 | } else { |
607 | *len = strlen(ret); |
f0e51ce1 |
608 | } |
ce1b04aa |
609 | |
610 | return ret; |
f0e51ce1 |
611 | } |
612 | |
f0e51ce1 |
613 | static int make_outline(object *parent, outline_element *items, int n, |
614 | int open) |
615 | { |
616 | int level, totalcount = 0; |
617 | outline_element *itemp; |
618 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
619 | |
620 | assert(n > 0); |
621 | |
622 | level = items->level; |
623 | |
624 | while (n > 0) { |
7c8c4239 |
625 | char *title; |
ce1b04aa |
626 | int titlelen; |
f0e51ce1 |
627 | |
628 | /* |
629 | * Here we expect to be sitting on an item at the given |
630 | * level. So we start by constructing an outline entry for |
631 | * that item. |
632 | */ |
633 | assert(items->level == level); |
634 | |
ce1b04aa |
635 | title = pdf_outline_convert(items->pdata->outline_title, &titlelen); |
f0e51ce1 |
636 | |
637 | totalcount++; |
638 | curr = new_object(parent->list); |
639 | if (!first) first = curr; |
640 | last = curr; |
7c8c4239 |
641 | objtext(curr, "<<\n/Title "); |
ce1b04aa |
642 | pdf_string_len(objtext, curr, title, titlelen); |
7c8c4239 |
643 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
644 | objref(curr, parent); |
645 | objtext(curr, "\n/Dest ["); |
be76d597 |
646 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
647 | objtext(curr, " /XYZ null null null]\n"); |
648 | if (prev) { |
649 | objtext(curr, "/Prev "); |
650 | objref(curr, prev); |
651 | objtext(curr, "\n"); |
652 | |
653 | objtext(prev, "/Next "); |
654 | objref(prev, curr); |
655 | objtext(prev, "\n>>\n"); |
656 | } |
657 | prev = curr; |
658 | |
659 | items++, n--; |
660 | for (itemp = items; itemp < items+n && itemp->level > level; |
661 | itemp++); |
662 | |
663 | if (itemp > items) { |
664 | char buf[80]; |
665 | int count = make_outline(curr, items, itemp - items, FALSE); |
666 | if (!open) |
667 | count = -count; |
668 | else |
669 | totalcount += count; |
670 | sprintf(buf, "/Count %d\n", count); |
671 | objtext(curr, buf); |
672 | } |
673 | |
674 | n -= itemp - items; |
675 | items = itemp; |
676 | } |
677 | objtext(prev, ">>\n"); |
678 | |
679 | assert(first && last); |
680 | objtext(parent, "/First "); |
681 | objref(parent, first); |
682 | objtext(parent, "\n/Last "); |
683 | objref(parent, last); |
684 | objtext(parent, "\n"); |
685 | |
686 | return totalcount; |
687 | } |
09358aa7 |
688 | |
689 | static int pdf_versionid(FILE *fp, word *words) |
690 | { |
691 | int ret; |
692 | |
693 | ret = fprintf(fp, "%% "); |
694 | |
695 | for (; words; words = words->next) { |
696 | char *text; |
697 | int type; |
698 | |
699 | switch (words->type) { |
700 | case word_HyperLink: |
701 | case word_HyperEnd: |
702 | case word_UpperXref: |
703 | case word_LowerXref: |
704 | case word_XrefEnd: |
705 | case word_IndexRef: |
706 | continue; |
707 | } |
708 | |
709 | type = removeattr(words->type); |
710 | |
711 | switch (type) { |
712 | case word_Normal: |
e4ea58f8 |
713 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
714 | break; |
715 | case word_WhiteSpace: |
716 | text = dupstr(" "); |
717 | break; |
718 | case word_Quote: |
719 | text = dupstr("'"); |
720 | break; |
721 | } |
722 | |
723 | fputs(text, fp); |
724 | ret += strlen(text); |
725 | sfree(text); |
726 | } |
727 | |
728 | ret += fprintf(fp, "\n"); |
729 | |
730 | return ret; |
731 | } |
7c8c4239 |
732 | |
ce1b04aa |
733 | static void pdf_string_len(void (*add)(object *, char const *), |
734 | object *o, char const *str, int len) |
7c8c4239 |
735 | { |
736 | char const *p; |
737 | |
738 | add(o, "("); |
ce1b04aa |
739 | for (p = str; len > 0; p++, len--) { |
740 | char c[10]; |
741 | if (*p < ' ' || *p > '~') { |
742 | sprintf(c, "\\%03o", 0xFF & (int)*p); |
743 | } else { |
744 | int n = 0; |
745 | if (*p == '\\' || *p == '(' || *p == ')') |
746 | c[n++] = '\\'; |
747 | c[n++] = *p; |
748 | c[n] = '\0'; |
749 | } |
7c8c4239 |
750 | add(o, c); |
751 | } |
752 | add(o, ")"); |
753 | } |
ce1b04aa |
754 | |
755 | static void pdf_string(void (*add)(object *, char const *), |
756 | object *o, char const *str) |
757 | { |
758 | pdf_string_len(add, o, str, strlen(str)); |
759 | } |