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); |
993ade7a |
41 | static char *pdf_outline_convert(wchar_t *s, int *len); |
43341922 |
42 | |
43 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
44 | page_data *last, object *resources, |
45 | object *mediabox); |
f0e51ce1 |
46 | static int make_outline(object *parent, outline_element *start, int n, |
47 | int open); |
09358aa7 |
48 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
49 | |
50 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
51 | indexdata *idx, void *vdoc) { |
52 | document *doc = (document *)vdoc; |
53 | int font_index; |
54 | font_encoding *fe; |
55 | page_data *page; |
56 | int pageno; |
57 | FILE *fp; |
58 | char *filename; |
59 | paragraph *p; |
60 | objlist olist; |
993ade7a |
61 | object *o, *info, *cat, *outlines, *pages, *resources, *mediabox; |
43341922 |
62 | int fileoff; |
63 | |
64 | IGNORE(keywords); |
65 | IGNORE(idx); |
66 | |
67 | filename = dupstr("output.pdf"); |
68 | for (p = sourceform; p; p = p->next) { |
7738a2fb |
69 | if (p->type == para_Config) { |
43341922 |
70 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
71 | sfree(filename); |
e4ea58f8 |
72 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
73 | } |
74 | } |
75 | } |
76 | |
77 | olist.head = olist.tail = NULL; |
78 | olist.number = 1; |
79 | |
993ade7a |
80 | { |
81 | char buf[256]; |
82 | |
83 | info = new_object(&olist); |
84 | objtext(info, "<<\n"); |
85 | if (doc->n_outline_elements > 0) { |
86 | char *title; |
87 | int titlelen; |
88 | |
89 | title = |
90 | pdf_outline_convert(doc->outline_elements->pdata->outline_title, |
91 | &titlelen); |
92 | objtext(info, "/Title "); |
93 | pdf_string_len(objtext, info, title, titlelen); |
94 | sfree(title); |
95 | objtext(info, "\n"); |
96 | } |
97 | objtext(info, "/Producer "); |
98 | sprintf(buf, "Halibut, %s", version); |
99 | pdf_string(objtext, info, buf); |
100 | objtext(info, "\n>>\n"); |
101 | } |
102 | |
43341922 |
103 | cat = new_object(&olist); |
a615a778 |
104 | if (doc->n_outline_elements > 0) |
105 | outlines = new_object(&olist); |
106 | else |
107 | outlines = NULL; |
43341922 |
108 | pages = new_object(&olist); |
109 | resources = new_object(&olist); |
110 | |
111 | /* |
43341922 |
112 | * The catalogue just contains references to the outlines and |
113 | * pages objects. |
114 | */ |
a615a778 |
115 | objtext(cat, "<<\n/Type /Catalog"); |
116 | if (outlines) { |
117 | objtext(cat, "\n/Outlines "); |
118 | objref(cat, outlines); |
119 | } |
43341922 |
120 | objtext(cat, "\n/Pages "); |
121 | objref(cat, pages); |
a615a778 |
122 | if (outlines) |
123 | objtext(cat, "\n/PageMode /UseOutlines"); |
124 | objtext(cat, "\n>>\n"); |
43341922 |
125 | |
126 | /* |
127 | * Set up the resources dictionary, which mostly means |
128 | * providing all the font objects and names to call them by. |
129 | */ |
130 | font_index = 0; |
131 | objtext(resources, "<<\n/Font <<\n"); |
132 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
133 | char fname[40]; |
134 | int i; |
135 | object *font; |
136 | |
137 | sprintf(fname, "f%d", font_index++); |
138 | fe->name = dupstr(fname); |
139 | |
140 | font = new_object(&olist); |
141 | |
142 | objtext(resources, "/"); |
143 | objtext(resources, fe->name); |
144 | objtext(resources, " "); |
145 | objref(resources, font); |
146 | objtext(resources, "\n"); |
147 | |
148 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
149 | objtext(font, fe->name); |
150 | objtext(font, "\n/BaseFont /"); |
151 | objtext(font, fe->font->name); |
152 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
153 | |
154 | for (i = 0; i < 256; i++) { |
155 | char buf[20]; |
156 | if (!fe->vector[i]) |
157 | continue; |
158 | sprintf(buf, "\n%d /", i); |
159 | objtext(font, buf); |
160 | objtext(font, fe->vector[i] ? fe->vector[i] : ".notdef"); |
161 | } |
162 | |
163 | objtext(font, "\n]\n>>\n"); |
164 | |
165 | { |
166 | object *widths = new_object(&olist); |
167 | objtext(font, "/FirstChar 0\n/LastChar 255\n/Widths "); |
168 | objref(font, widths); |
169 | objtext(font, "\n"); |
170 | objtext(widths, "[\n"); |
171 | for (i = 0; i < 256; i++) { |
172 | char buf[80]; |
173 | double width; |
174 | if (fe->indices[i] < 0) |
175 | width = 0.0; |
176 | else |
177 | width = fe->font->widths[fe->indices[i]]; |
17c71b41 |
178 | sprintf(buf, "%g\n", 1000.0 * width / FUNITS_PER_PT); |
43341922 |
179 | objtext(widths, buf); |
180 | } |
181 | objtext(widths, "]\n"); |
182 | } |
183 | |
184 | objtext(font, ">>\n"); |
185 | } |
186 | objtext(resources, ">>\n>>\n"); |
187 | |
2ff8419e |
188 | { |
189 | char buf[255]; |
190 | mediabox = new_object(&olist); |
191 | sprintf(buf, "[0 0 %g %g]\n", |
192 | doc->paper_width / FUNITS_PER_PT, |
193 | doc->paper_height / FUNITS_PER_PT); |
194 | objtext(mediabox, buf); |
195 | } |
196 | |
43341922 |
197 | /* |
198 | * Define the page objects for each page, and get each one |
199 | * ready to have a `Parent' specification added to it. |
200 | */ |
201 | for (page = doc->pages; page; page = page->next) { |
202 | object *opage; |
203 | |
204 | opage = new_object(&olist); |
205 | page->spare = opage; |
206 | objtext(opage, "<<\n/Type /Page\n"); |
207 | } |
208 | |
209 | /* |
210 | * Recursively build the page tree. |
211 | */ |
2ff8419e |
212 | make_pages_node(pages, NULL, doc->pages, NULL, resources, mediabox); |
43341922 |
213 | |
214 | /* |
215 | * Create and render the individual pages. |
216 | */ |
217 | pageno = 0; |
218 | for (page = doc->pages; page; page = page->next) { |
219 | object *opage, *cstr; |
23765aeb |
220 | rect *r; |
7c8c4239 |
221 | text_fragment *frag, *frag_end; |
43341922 |
222 | char buf[256]; |
7c8c4239 |
223 | int x, y, lx, ly; |
43341922 |
224 | |
225 | opage = (object *)page->spare; |
226 | /* |
227 | * At this point the page dictionary is already |
228 | * half-written, with /Type and /Parent already present. We |
229 | * continue from there. |
230 | */ |
231 | |
232 | /* |
233 | * The PDF spec says /Resources is required, but also says |
234 | * that it's inheritable and may be omitted if it's present |
235 | * in a Pages node. In our case it is: it's present in the |
236 | * topmost /Pages node because we carefully put it there. |
2ff8419e |
237 | * So we don't need a /Resources entry here. The same applies |
238 | * to /MediaBox. |
43341922 |
239 | */ |
43341922 |
240 | |
241 | /* |
242 | * Now we're ready to define a content stream containing |
243 | * the actual text on the page. |
244 | */ |
245 | cstr = new_object(&olist); |
246 | objtext(opage, "/Contents "); |
247 | objref(opage, cstr); |
248 | objtext(opage, "\n"); |
249 | |
23765aeb |
250 | /* |
251 | * Render any rectangles on the page. |
252 | */ |
253 | for (r = page->first_rect; r; r = r->next) { |
254 | char buf[512]; |
17c71b41 |
255 | sprintf(buf, "%g %g %g %g re f\n", |
256 | r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT, |
257 | r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT); |
23765aeb |
258 | objstream(cstr, buf); |
259 | } |
260 | |
43341922 |
261 | objstream(cstr, "BT\n"); |
43341922 |
262 | |
7c8c4239 |
263 | /* |
264 | * PDF tracks two separate current positions: the position |
265 | * given in the `line matrix' and the position given in the |
266 | * `text matrix'. We must therefore track both as well. |
267 | * They start off at -1 (unset). |
268 | */ |
269 | lx = ly = -1; |
270 | x = y = -1; |
271 | |
272 | frag = page->first_text; |
273 | while (frag) { |
274 | /* |
275 | * For compactness, I'm going to group text fragments |
276 | * into subsequences that use the same font+size. So |
277 | * first find the end of this subsequence. |
278 | */ |
279 | for (frag_end = frag; |
280 | (frag_end && |
281 | frag_end->fe == frag->fe && |
282 | frag_end->fontsize == frag->fontsize); |
283 | frag_end = frag_end->next); |
284 | |
285 | /* |
286 | * Now select the text fragment, and prepare to display |
287 | * the text. |
288 | */ |
43341922 |
289 | objstream(cstr, "/"); |
290 | objstream(cstr, frag->fe->name); |
7c8c4239 |
291 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
292 | objstream(cstr, buf); |
293 | |
7c8c4239 |
294 | while (frag && frag != frag_end) { |
295 | /* |
296 | * Place the text position for the first piece of |
297 | * text. |
298 | */ |
299 | if (lx < 0) { |
300 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
17c71b41 |
301 | frag->x/FUNITS_PER_PT, frag->y/FUNITS_PER_PT); |
7c8c4239 |
302 | } else { |
303 | sprintf(buf, "%g %g Td ", |
17c71b41 |
304 | (frag->x - lx)/FUNITS_PER_PT, |
305 | (frag->y - ly)/FUNITS_PER_PT); |
7c8c4239 |
306 | } |
43341922 |
307 | objstream(cstr, buf); |
7c8c4239 |
308 | lx = x = frag->x; |
309 | ly = y = frag->y; |
310 | |
311 | /* |
312 | * See if we're going to use Tj (show a single |
313 | * string) or TJ (show an array of strings with |
314 | * x-spacings between them). We determine this by |
315 | * seeing if there's more than one text fragment in |
316 | * sequence with the same y-coordinate. |
317 | */ |
318 | if (frag->next && frag->next != frag_end && |
319 | frag->next->y == y) { |
320 | /* |
321 | * The TJ strategy. |
322 | */ |
323 | objstream(cstr, "["); |
324 | while (frag && frag != frag_end && frag->y == y) { |
325 | if (frag->x != x) { |
326 | sprintf(buf, "%g", |
327 | (x - frag->x) * 1000.0 / |
17c71b41 |
328 | (FUNITS_PER_PT * frag->fontsize)); |
7c8c4239 |
329 | objstream(cstr, buf); |
330 | } |
331 | pdf_string(objstream, cstr, frag->text); |
332 | x = frag->x + frag->width; |
333 | frag = frag->next; |
334 | } |
335 | objstream(cstr, "]TJ\n"); |
336 | } else |
337 | { |
338 | /* |
339 | * The Tj strategy. |
340 | */ |
341 | pdf_string(objstream, cstr, frag->text); |
342 | objstream(cstr, "Tj\n"); |
343 | frag = frag->next; |
344 | } |
43341922 |
345 | } |
43341922 |
346 | } |
347 | objstream(cstr, "ET"); |
348 | |
138d7ffb |
349 | /* |
350 | * Also, we want an annotation dictionary containing the |
351 | * cross-references from this page. |
352 | */ |
353 | if (page->first_xref) { |
354 | xref *xr; |
355 | objtext(opage, "/Annots [\n"); |
356 | |
357 | for (xr = page->first_xref; xr; xr = xr->next) { |
358 | object *annot; |
359 | char buf[256]; |
360 | |
361 | annot = new_object(&olist); |
362 | objref(opage, annot); |
363 | objtext(opage, "\n"); |
364 | |
365 | objtext(annot, "<<\n/Type /Annot\n/Subtype /Link\n/Rect ["); |
366 | sprintf(buf, "%g %g %g %g", |
17c71b41 |
367 | xr->lx / FUNITS_PER_PT, xr->by / FUNITS_PER_PT, |
368 | xr->rx / FUNITS_PER_PT, xr->ty / FUNITS_PER_PT); |
138d7ffb |
369 | objtext(annot, buf); |
370 | objtext(annot, "]\n/Border [0 0 0]\n"); |
371 | |
372 | if (xr->dest.type == PAGE) { |
373 | objtext(annot, "/Dest ["); |
374 | objref(annot, (object *)xr->dest.page->spare); |
375 | objtext(annot, " /XYZ null null null]\n"); |
376 | } else { |
7c8c4239 |
377 | objtext(annot, "/A <<\n/Type /Action\n/S /URI\n/URI "); |
378 | pdf_string(objtext, annot, xr->dest.url); |
379 | objtext(annot, "\n>>\n"); |
138d7ffb |
380 | } |
381 | |
382 | objtext(annot, ">>\n"); |
383 | } |
384 | |
385 | objtext(opage, "]\n"); |
386 | } |
387 | |
43341922 |
388 | objtext(opage, ">>\n"); |
389 | } |
390 | |
391 | /* |
f0e51ce1 |
392 | * Set up the outlines dictionary. |
393 | */ |
a615a778 |
394 | if (outlines) { |
f0e51ce1 |
395 | int topcount; |
396 | char buf[80]; |
397 | |
398 | objtext(outlines, "<<\n/Type /Outlines\n"); |
399 | topcount = make_outline(outlines, doc->outline_elements, |
400 | doc->n_outline_elements, TRUE); |
401 | sprintf(buf, "/Count %d\n>>\n", topcount); |
402 | objtext(outlines, buf); |
403 | } |
404 | |
405 | /* |
43341922 |
406 | * Assemble the final linear form of every object. |
407 | */ |
408 | for (o = olist.head; o; o = o->next) { |
409 | rdstringc rs = {0, 0, NULL}; |
410 | char text[80]; |
411 | |
412 | sprintf(text, "%d 0 obj\n", o->number); |
413 | rdaddsc(&rs, text); |
414 | |
415 | if (!o->main.text && o->stream.text) { |
416 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
417 | rdaddsc(&o->main, text); |
418 | } |
419 | |
420 | assert(o->main.text); |
421 | rdaddsc(&rs, o->main.text); |
422 | sfree(o->main.text); |
423 | |
424 | if (rs.text[rs.pos-1] != '\n') |
425 | rdaddc(&rs, '\n'); |
426 | |
427 | if (o->stream.text) { |
428 | /* |
429 | * FIXME: If we ever start compressing stream data then |
430 | * it will have zero bytes in it, so we'll have to be |
431 | * more careful than this. |
432 | */ |
433 | rdaddsc(&rs, "stream\n"); |
434 | rdaddsc(&rs, o->stream.text); |
435 | rdaddsc(&rs, "\nendstream\n"); |
436 | sfree(o->stream.text); |
437 | } |
438 | |
439 | rdaddsc(&rs, "endobj\n"); |
440 | |
441 | o->final = rs.text; |
442 | o->size = rs.pos; |
443 | } |
444 | |
445 | /* |
446 | * Write out the PDF file. |
447 | */ |
448 | |
449 | fp = fopen(filename, "wb"); |
450 | if (!fp) { |
451 | error(err_cantopenw, filename); |
452 | return; |
453 | } |
454 | |
455 | /* |
09358aa7 |
456 | * Header. I'm going to put the version IDs in the header as |
457 | * well, simply in PDF comments. |
43341922 |
458 | */ |
459 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
460 | for (p = sourceform; p; p = p->next) |
461 | if (p->type == para_VersionID) |
462 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
463 | |
464 | /* |
465 | * Body |
466 | */ |
467 | for (o = olist.head; o; o = o->next) { |
468 | o->fileoff = fileoff; |
469 | fwrite(o->final, 1, o->size, fp); |
470 | fileoff += o->size; |
471 | } |
472 | |
473 | /* |
474 | * Cross-reference table |
475 | */ |
476 | fprintf(fp, "xref\n"); |
477 | assert(olist.head->number == 1); |
478 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
479 | fprintf(fp, "0000000000 65535 f \n"); |
480 | for (o = olist.head; o; o = o->next) { |
481 | char entry[40]; |
482 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
483 | assert(strlen(entry) == 20); |
484 | fputs(entry, fp); |
485 | } |
486 | |
487 | /* |
488 | * Trailer |
489 | */ |
993ade7a |
490 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n/Info %d 0 R\n>>\n", |
491 | olist.tail->number + 1, cat->number, info->number); |
43341922 |
492 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
493 | |
494 | fclose(fp); |
495 | |
496 | sfree(filename); |
497 | } |
498 | |
499 | static object *new_object(objlist *list) |
500 | { |
f1530049 |
501 | object *obj = snew(object); |
43341922 |
502 | |
503 | obj->list = list; |
504 | |
505 | obj->main.text = NULL; |
506 | obj->main.pos = obj->main.size = 0; |
507 | obj->stream.text = NULL; |
508 | obj->stream.pos = obj->stream.size = 0; |
509 | |
510 | obj->number = list->number++; |
511 | |
512 | obj->next = NULL; |
513 | if (list->tail) |
514 | list->tail->next = obj; |
515 | else |
516 | list->head = obj; |
517 | list->tail = obj; |
518 | |
519 | obj->size = 0; |
520 | obj->final = NULL; |
521 | |
522 | return obj; |
523 | } |
524 | |
525 | static void objtext(object *o, char const *text) |
526 | { |
527 | rdaddsc(&o->main, text); |
528 | } |
529 | |
530 | static void objstream(object *o, char const *text) |
531 | { |
532 | rdaddsc(&o->stream, text); |
533 | } |
534 | |
535 | static void objref(object *o, object *dest) |
536 | { |
537 | char buf[40]; |
538 | sprintf(buf, "%d 0 R", dest->number); |
539 | rdaddsc(&o->main, buf); |
540 | } |
541 | |
542 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
543 | page_data *last, object *resources, |
544 | object *mediabox) |
43341922 |
545 | { |
546 | int count; |
547 | page_data *page; |
548 | char buf[80]; |
549 | |
550 | objtext(node, "<<\n/Type /Pages\n"); |
551 | if (parent) { |
552 | objtext(node, "/Parent "); |
553 | objref(node, parent); |
554 | objtext(node, "\n"); |
555 | } |
556 | |
557 | /* |
558 | * Count the pages in this stretch, to see if there are few |
559 | * enough to reference directly. |
560 | */ |
561 | count = 0; |
562 | for (page = first; page; page = page->next) { |
563 | count++; |
564 | if (page == last) |
565 | break; |
566 | } |
567 | |
568 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
569 | objtext(node, buf); |
570 | |
571 | if (count > TREE_BRANCH) { |
572 | int i; |
573 | page_data *thisfirst, *thislast; |
574 | |
575 | page = first; |
576 | |
577 | for (i = 0; i < TREE_BRANCH; i++) { |
578 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
579 | thisfirst = page; |
580 | while (number--) { |
581 | thislast = page; |
582 | page = page->next; |
583 | } |
584 | |
585 | if (thisfirst == thislast) { |
586 | objref(node, (object *)thisfirst->spare); |
587 | objtext((object *)thisfirst->spare, "/Parent "); |
588 | objref((object *)thisfirst->spare, node); |
589 | objtext((object *)thisfirst->spare, "\n"); |
590 | } else { |
591 | object *newnode = new_object(node->list); |
2ff8419e |
592 | make_pages_node(newnode, node, thisfirst, thislast, |
593 | NULL, NULL); |
43341922 |
594 | objref(node, newnode); |
595 | } |
596 | objtext(node, "\n"); |
597 | } |
598 | |
599 | assert(thislast == last || page == NULL); |
600 | |
601 | } else { |
602 | for (page = first; page; page = page->next) { |
603 | objref(node, (object *)page->spare); |
604 | objtext(node, "\n"); |
605 | objtext((object *)page->spare, "/Parent "); |
606 | objref((object *)page->spare, node); |
607 | objtext((object *)page->spare, "\n"); |
608 | if (page == last) |
609 | break; |
610 | } |
611 | } |
612 | |
613 | objtext(node, "]\n"); |
614 | |
615 | if (resources) { |
616 | objtext(node, "/Resources "); |
617 | objref(node, resources); |
618 | objtext(node, "\n"); |
619 | } |
2ff8419e |
620 | if (mediabox) { |
621 | objtext(node, "/MediaBox "); |
622 | objref(node, mediabox); |
623 | objtext(node, "\n"); |
624 | } |
43341922 |
625 | |
626 | objtext(node, ">>\n"); |
627 | } |
f0e51ce1 |
628 | |
629 | /* |
630 | * In text on the page, PDF uses the PostScript font model, which |
631 | * means that glyphs are identified by PS strings and hence font |
632 | * encoding can be managed independently of the supplied encoding |
633 | * of the font. However, in the document outline, the PDF spec |
ce1b04aa |
634 | * encodes in either PDFDocEncoding (a custom superset of |
635 | * ISO-8859-1) or UTF-16BE. |
f0e51ce1 |
636 | */ |
ce1b04aa |
637 | static char *pdf_outline_convert(wchar_t *s, int *len) { |
638 | char *ret; |
639 | |
640 | ret = utoa_careful_dup(s, CS_PDF); |
641 | |
642 | /* |
643 | * Very silly special case: if the returned string begins with |
644 | * FE FF, then the PDF reader will mistake it for a UTF-16BE |
645 | * string. So in this case we give up on PDFDocEncoding and |
646 | * encode it in UTF-16 straight away. |
647 | */ |
648 | if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') { |
649 | sfree(ret); |
650 | ret = NULL; |
f0e51ce1 |
651 | } |
ce1b04aa |
652 | |
653 | if (!ret) { |
654 | ret = utoa_dup_len(s, CS_UTF16BE, len); |
655 | } else { |
656 | *len = strlen(ret); |
f0e51ce1 |
657 | } |
ce1b04aa |
658 | |
659 | return ret; |
f0e51ce1 |
660 | } |
661 | |
f0e51ce1 |
662 | static int make_outline(object *parent, outline_element *items, int n, |
663 | int open) |
664 | { |
665 | int level, totalcount = 0; |
666 | outline_element *itemp; |
667 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
668 | |
669 | assert(n > 0); |
670 | |
671 | level = items->level; |
672 | |
673 | while (n > 0) { |
7c8c4239 |
674 | char *title; |
ce1b04aa |
675 | int titlelen; |
f0e51ce1 |
676 | |
677 | /* |
678 | * Here we expect to be sitting on an item at the given |
679 | * level. So we start by constructing an outline entry for |
680 | * that item. |
681 | */ |
682 | assert(items->level == level); |
683 | |
ce1b04aa |
684 | title = pdf_outline_convert(items->pdata->outline_title, &titlelen); |
f0e51ce1 |
685 | |
686 | totalcount++; |
687 | curr = new_object(parent->list); |
688 | if (!first) first = curr; |
689 | last = curr; |
7c8c4239 |
690 | objtext(curr, "<<\n/Title "); |
ce1b04aa |
691 | pdf_string_len(objtext, curr, title, titlelen); |
993ade7a |
692 | sfree(title); |
7c8c4239 |
693 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
694 | objref(curr, parent); |
695 | objtext(curr, "\n/Dest ["); |
be76d597 |
696 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
697 | objtext(curr, " /XYZ null null null]\n"); |
698 | if (prev) { |
699 | objtext(curr, "/Prev "); |
700 | objref(curr, prev); |
701 | objtext(curr, "\n"); |
702 | |
703 | objtext(prev, "/Next "); |
704 | objref(prev, curr); |
705 | objtext(prev, "\n>>\n"); |
706 | } |
707 | prev = curr; |
708 | |
709 | items++, n--; |
710 | for (itemp = items; itemp < items+n && itemp->level > level; |
711 | itemp++); |
712 | |
713 | if (itemp > items) { |
714 | char buf[80]; |
715 | int count = make_outline(curr, items, itemp - items, FALSE); |
716 | if (!open) |
717 | count = -count; |
718 | else |
719 | totalcount += count; |
720 | sprintf(buf, "/Count %d\n", count); |
721 | objtext(curr, buf); |
722 | } |
723 | |
724 | n -= itemp - items; |
725 | items = itemp; |
726 | } |
727 | objtext(prev, ">>\n"); |
728 | |
729 | assert(first && last); |
730 | objtext(parent, "/First "); |
731 | objref(parent, first); |
732 | objtext(parent, "\n/Last "); |
733 | objref(parent, last); |
734 | objtext(parent, "\n"); |
735 | |
736 | return totalcount; |
737 | } |
09358aa7 |
738 | |
739 | static int pdf_versionid(FILE *fp, word *words) |
740 | { |
741 | int ret; |
742 | |
743 | ret = fprintf(fp, "%% "); |
744 | |
745 | for (; words; words = words->next) { |
746 | char *text; |
747 | int type; |
748 | |
749 | switch (words->type) { |
750 | case word_HyperLink: |
751 | case word_HyperEnd: |
752 | case word_UpperXref: |
753 | case word_LowerXref: |
754 | case word_XrefEnd: |
755 | case word_IndexRef: |
756 | continue; |
757 | } |
758 | |
759 | type = removeattr(words->type); |
760 | |
761 | switch (type) { |
762 | case word_Normal: |
e4ea58f8 |
763 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
764 | break; |
765 | case word_WhiteSpace: |
766 | text = dupstr(" "); |
767 | break; |
768 | case word_Quote: |
769 | text = dupstr("'"); |
770 | break; |
771 | } |
772 | |
773 | fputs(text, fp); |
774 | ret += strlen(text); |
775 | sfree(text); |
776 | } |
777 | |
778 | ret += fprintf(fp, "\n"); |
779 | |
780 | return ret; |
781 | } |
7c8c4239 |
782 | |
ce1b04aa |
783 | static void pdf_string_len(void (*add)(object *, char const *), |
784 | object *o, char const *str, int len) |
7c8c4239 |
785 | { |
786 | char const *p; |
787 | |
788 | add(o, "("); |
ce1b04aa |
789 | for (p = str; len > 0; p++, len--) { |
790 | char c[10]; |
791 | if (*p < ' ' || *p > '~') { |
792 | sprintf(c, "\\%03o", 0xFF & (int)*p); |
793 | } else { |
794 | int n = 0; |
795 | if (*p == '\\' || *p == '(' || *p == ')') |
796 | c[n++] = '\\'; |
797 | c[n++] = *p; |
798 | c[n] = '\0'; |
799 | } |
7c8c4239 |
800 | add(o, c); |
801 | } |
802 | add(o, ")"); |
803 | } |
ce1b04aa |
804 | |
805 | static void pdf_string(void (*add)(object *, char const *), |
806 | object *o, char const *str) |
807 | { |
808 | pdf_string_len(add, o, str, strlen(str)); |
809 | } |