| 1 | /* |
| 2 | * Paper printing pre-backend for Halibut. |
| 3 | * |
| 4 | * This module does all the processing common to both PostScript |
| 5 | * and PDF output: selecting fonts, line wrapping and page breaking |
| 6 | * in accordance with font metrics, laying out the contents and |
| 7 | * index pages, generally doing all the page layout. After this, |
| 8 | * bk_ps.c and bk_pdf.c should only need to do linear translations |
| 9 | * into their literal output format. |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * To be done: |
| 14 | * |
| 15 | * - index |
| 16 | * |
| 17 | * - header/footer? Page numbers at least would be handy. Fully |
| 18 | * configurable footer can wait, though. |
| 19 | * |
| 20 | * That should bring us to the same level of functionality that |
| 21 | * original-Halibut had, and the same in PDF plus the obvious |
| 22 | * interactive navigation features. After that, in future work: |
| 23 | * |
| 24 | * - linearised PDF, perhaps? |
| 25 | * |
| 26 | * - I'm uncertain of whether I need to include a ToUnicode CMap |
| 27 | * in each of my font definitions in PDF. Currently things (by |
| 28 | * which I mean cut and paste out of acroread) seem to be |
| 29 | * working fairly happily without it, but I don't know. |
| 30 | * |
| 31 | * - configurability |
| 32 | * |
| 33 | * - title pages |
| 34 | */ |
| 35 | |
| 36 | #include <assert.h> |
| 37 | #include <stdio.h> |
| 38 | |
| 39 | #include "halibut.h" |
| 40 | #include "paper.h" |
| 41 | |
| 42 | typedef struct paper_conf_Tag paper_conf; |
| 43 | |
| 44 | struct paper_conf_Tag { |
| 45 | int paper_width; |
| 46 | int paper_height; |
| 47 | int left_margin; |
| 48 | int top_margin; |
| 49 | int right_margin; |
| 50 | int bottom_margin; |
| 51 | int indent_list_bullet; |
| 52 | int indent_list; |
| 53 | int indent_quote; |
| 54 | int base_leading; |
| 55 | int base_para_spacing; |
| 56 | int chapter_top_space; |
| 57 | int sect_num_left_space; |
| 58 | int chapter_underline_depth; |
| 59 | int chapter_underline_thickness; |
| 60 | int rule_thickness; |
| 61 | int base_font_size; |
| 62 | int contents_indent_step; |
| 63 | int contents_margin; |
| 64 | int leader_separation; |
| 65 | /* These are derived from the above */ |
| 66 | int base_width; |
| 67 | int page_height; |
| 68 | /* Fonts used in the configuration */ |
| 69 | font_data *tr, *ti, *hr, *hi, *cr, *co, *cb; |
| 70 | }; |
| 71 | |
| 72 | static font_data *make_std_font(font_list *fontlist, char const *name); |
| 73 | static void wrap_paragraph(para_data *pdata, word *words, |
| 74 | int w, int i1, int i2); |
| 75 | static page_data *page_breaks(line_data *first, line_data *last, |
| 76 | int page_height); |
| 77 | static int render_string(page_data *page, font_data *font, int fontsize, |
| 78 | int x, int y, wchar_t *str); |
| 79 | static int render_line(line_data *ldata, int left_x, int top_y, |
| 80 | xref_dest *dest, keywordlist *keywords); |
| 81 | static int paper_width_simple(para_data *pdata, word *text); |
| 82 | static para_data *code_paragraph(int indent, word *words, paper_conf *conf); |
| 83 | static para_data *rule_paragraph(int indent, paper_conf *conf); |
| 84 | static void add_rect_to_page(page_data *page, int x, int y, int w, int h); |
| 85 | static para_data *make_para_data(int ptype, int paux, int indent, int rmargin, |
| 86 | word *pkwtext, word *pkwtext2, word *pwords, |
| 87 | paper_conf *conf); |
| 88 | static void standard_line_spacing(para_data *pdata, paper_conf *conf); |
| 89 | static wchar_t *prepare_outline_title(word *first, wchar_t *separator, |
| 90 | word *second); |
| 91 | static word *fake_word(wchar_t *text); |
| 92 | static word *prepare_contents_title(word *first, wchar_t *separator, |
| 93 | word *second); |
| 94 | |
| 95 | void *paper_pre_backend(paragraph *sourceform, keywordlist *keywords, |
| 96 | indexdata *idx) { |
| 97 | paragraph *p; |
| 98 | document *doc; |
| 99 | int indent, used_contents; |
| 100 | para_data *pdata, *firstpara = NULL, *lastpara = NULL; |
| 101 | para_data *firstcont, *lastcont; |
| 102 | line_data *ldata, *firstline, *lastline, *firstcontline, *lastcontline; |
| 103 | page_data *pages; |
| 104 | font_list *fontlist; |
| 105 | paper_conf *conf; |
| 106 | |
| 107 | /* |
| 108 | * FIXME: All these things ought to become configurable. |
| 109 | */ |
| 110 | conf = mknew(paper_conf); |
| 111 | conf->paper_width = 595 * 4096; |
| 112 | conf->paper_height = 841 * 4096; |
| 113 | conf->left_margin = 72 * 4096; |
| 114 | conf->top_margin = 72 * 4096; |
| 115 | conf->right_margin = 72 * 4096; |
| 116 | conf->bottom_margin = 108 * 4096; |
| 117 | conf->indent_list_bullet = 6 * 4096; |
| 118 | conf->indent_list = 24 * 4096; |
| 119 | conf->indent_quote = 18 * 4096; |
| 120 | conf->base_leading = 4096; |
| 121 | conf->base_para_spacing = 10 * 4096; |
| 122 | conf->chapter_top_space = 72 * 4096; |
| 123 | conf->sect_num_left_space = 12 * 4096; |
| 124 | conf->chapter_underline_depth = 14 * 4096; |
| 125 | conf->chapter_underline_thickness = 3 * 4096; |
| 126 | conf->rule_thickness = 1 * 4096; |
| 127 | conf->base_font_size = 12; |
| 128 | conf->contents_indent_step = 24 * 4096; |
| 129 | conf->contents_margin = 84 * 4096; |
| 130 | conf->leader_separation = 12 * 4096; |
| 131 | |
| 132 | conf->base_width = |
| 133 | conf->paper_width - conf->left_margin - conf->right_margin; |
| 134 | conf->page_height = |
| 135 | conf->paper_height - conf->top_margin - conf->bottom_margin; |
| 136 | |
| 137 | IGNORE(idx); /* FIXME */ |
| 138 | |
| 139 | /* |
| 140 | * First, set up some font structures. |
| 141 | */ |
| 142 | fontlist = mknew(font_list); |
| 143 | fontlist->head = fontlist->tail = NULL; |
| 144 | conf->tr = make_std_font(fontlist, "Times-Roman"); |
| 145 | conf->ti = make_std_font(fontlist, "Times-Italic"); |
| 146 | conf->hr = make_std_font(fontlist, "Helvetica-Bold"); |
| 147 | conf->hi = make_std_font(fontlist, "Helvetica-BoldOblique"); |
| 148 | conf->cr = make_std_font(fontlist, "Courier"); |
| 149 | conf->co = make_std_font(fontlist, "Courier-Oblique"); |
| 150 | conf->cb = make_std_font(fontlist, "Courier-Bold"); |
| 151 | |
| 152 | /* |
| 153 | * Format the contents entry for each heading. |
| 154 | */ |
| 155 | { |
| 156 | word *contents_title; |
| 157 | contents_title = fake_word(L"Contents"); |
| 158 | |
| 159 | firstcont = make_para_data(para_UnnumberedChapter, 0, 0, 0, |
| 160 | NULL, NULL, contents_title, conf); |
| 161 | lastcont = firstcont; |
| 162 | lastcont->next = NULL; |
| 163 | firstcontline = firstcont->first; |
| 164 | lastcontline = lastcont->last; |
| 165 | for (p = sourceform; p; p = p->next) { |
| 166 | word *words; |
| 167 | int indent; |
| 168 | |
| 169 | switch (p->type) { |
| 170 | case para_Chapter: |
| 171 | case para_Appendix: |
| 172 | case para_UnnumberedChapter: |
| 173 | case para_Heading: |
| 174 | case para_Subsect: |
| 175 | switch (p->type) { |
| 176 | case para_Chapter: |
| 177 | case para_Appendix: |
| 178 | words = prepare_contents_title(p->kwtext, L": ", p->words); |
| 179 | indent = 0; |
| 180 | break; |
| 181 | case para_UnnumberedChapter: |
| 182 | words = prepare_contents_title(NULL, NULL, p->words); |
| 183 | indent = 0; |
| 184 | break; |
| 185 | case para_Heading: |
| 186 | case para_Subsect: |
| 187 | words = prepare_contents_title(p->kwtext2, L" ", p->words); |
| 188 | indent = (p->aux + 1) * conf->contents_indent_step; |
| 189 | break; |
| 190 | } |
| 191 | pdata = make_para_data(para_Normal, p->aux, indent, |
| 192 | conf->contents_margin, |
| 193 | NULL, NULL, words, conf); |
| 194 | pdata->next = NULL; |
| 195 | pdata->contents_entry = p; |
| 196 | lastcont->next = pdata; |
| 197 | lastcont = pdata; |
| 198 | |
| 199 | /* |
| 200 | * Link all contents line structures together into |
| 201 | * a big list. |
| 202 | */ |
| 203 | if (pdata->first) { |
| 204 | if (lastcontline) { |
| 205 | lastcontline->next = pdata->first; |
| 206 | pdata->first->prev = lastcontline; |
| 207 | } else { |
| 208 | firstcontline = pdata->first; |
| 209 | pdata->first->prev = NULL; |
| 210 | } |
| 211 | lastcontline = pdata->last; |
| 212 | lastcontline->next = NULL; |
| 213 | } |
| 214 | |
| 215 | break; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Do the main paragraph formatting. |
| 222 | */ |
| 223 | indent = 0; |
| 224 | used_contents = FALSE; |
| 225 | firstline = lastline = NULL; |
| 226 | for (p = sourceform; p; p = p->next) { |
| 227 | p->private_data = NULL; |
| 228 | |
| 229 | switch (p->type) { |
| 230 | /* |
| 231 | * These paragraph types are either invisible or don't |
| 232 | * define text in the normal sense. Either way, they |
| 233 | * don't require wrapping. |
| 234 | */ |
| 235 | case para_IM: |
| 236 | case para_BR: |
| 237 | case para_Biblio: |
| 238 | case para_NotParaType: |
| 239 | case para_Config: |
| 240 | case para_VersionID: |
| 241 | case para_NoCite: |
| 242 | break; |
| 243 | |
| 244 | /* |
| 245 | * These paragraph types don't require wrapping, but |
| 246 | * they do affect the line width to which we wrap the |
| 247 | * rest of the paragraphs, so we need to pay attention. |
| 248 | */ |
| 249 | case para_LcontPush: |
| 250 | indent += conf->indent_list; break; |
| 251 | case para_LcontPop: |
| 252 | indent -= conf->indent_list; assert(indent >= 0); break; |
| 253 | case para_QuotePush: |
| 254 | indent += conf->indent_quote; break; |
| 255 | case para_QuotePop: |
| 256 | indent -= conf->indent_quote; assert(indent >= 0); break; |
| 257 | |
| 258 | /* |
| 259 | * This paragraph type is special. Process it |
| 260 | * specially. |
| 261 | */ |
| 262 | case para_Code: |
| 263 | pdata = code_paragraph(indent, p->words, conf); |
| 264 | p->private_data = pdata; |
| 265 | if (pdata->first != pdata->last) { |
| 266 | pdata->first->penalty_after += 100000; |
| 267 | pdata->last->penalty_before += 100000; |
| 268 | } |
| 269 | break; |
| 270 | |
| 271 | /* |
| 272 | * This paragraph is also special. |
| 273 | */ |
| 274 | case para_Rule: |
| 275 | pdata = rule_paragraph(indent, conf); |
| 276 | p->private_data = pdata; |
| 277 | break; |
| 278 | |
| 279 | /* |
| 280 | * All of these paragraph types require wrapping in the |
| 281 | * ordinary way. So we must supply a set of fonts, a |
| 282 | * line width and auxiliary information (e.g. bullet |
| 283 | * text) for each one. |
| 284 | */ |
| 285 | case para_Chapter: |
| 286 | case para_Appendix: |
| 287 | case para_UnnumberedChapter: |
| 288 | case para_Heading: |
| 289 | case para_Subsect: |
| 290 | case para_Normal: |
| 291 | case para_BiblioCited: |
| 292 | case para_Bullet: |
| 293 | case para_NumberedList: |
| 294 | case para_DescribedThing: |
| 295 | case para_Description: |
| 296 | case para_Copyright: |
| 297 | case para_Title: |
| 298 | pdata = make_para_data(p->type, p->aux, indent, 0, |
| 299 | p->kwtext, p->kwtext2, p->words, conf); |
| 300 | |
| 301 | p->private_data = pdata; |
| 302 | |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | if (p->private_data) { |
| 307 | pdata = (para_data *)p->private_data; |
| 308 | |
| 309 | /* |
| 310 | * If this is the first non-title heading, we link the |
| 311 | * contents section in before it. |
| 312 | */ |
| 313 | if (!used_contents && pdata->outline_level > 0) { |
| 314 | used_contents = TRUE; |
| 315 | if (lastpara) |
| 316 | lastpara->next = firstcont; |
| 317 | else |
| 318 | firstpara = firstcont; |
| 319 | lastpara = lastcont; |
| 320 | assert(lastpara->next == NULL); |
| 321 | |
| 322 | if (lastline) { |
| 323 | lastline->next = firstcontline; |
| 324 | firstcontline->prev = lastline; |
| 325 | } else { |
| 326 | firstline = firstcontline; |
| 327 | firstcontline->prev = NULL; |
| 328 | } |
| 329 | assert(lastcontline != NULL); |
| 330 | lastline = lastcontline; |
| 331 | lastline->next = NULL; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * Link all line structures together into a big list. |
| 336 | */ |
| 337 | if (pdata->first) { |
| 338 | if (lastline) { |
| 339 | lastline->next = pdata->first; |
| 340 | pdata->first->prev = lastline; |
| 341 | } else { |
| 342 | firstline = pdata->first; |
| 343 | pdata->first->prev = NULL; |
| 344 | } |
| 345 | lastline = pdata->last; |
| 346 | lastline->next = NULL; |
| 347 | } |
| 348 | |
| 349 | /* |
| 350 | * Link all paragraph structures together similarly. |
| 351 | */ |
| 352 | pdata->next = NULL; |
| 353 | if (lastpara) |
| 354 | lastpara->next = pdata; |
| 355 | else |
| 356 | firstpara = pdata; |
| 357 | lastpara = pdata; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * Now we have an enormous linked list of every line of text in |
| 363 | * the document. Break it up into pages. |
| 364 | */ |
| 365 | pages = page_breaks(firstline, lastline, conf->page_height); |
| 366 | |
| 367 | /* |
| 368 | * Number the pages. |
| 369 | */ |
| 370 | { |
| 371 | page_data *page; |
| 372 | int num = 0; |
| 373 | for (page = pages; page; page = page->next) { |
| 374 | char buf[40]; |
| 375 | sprintf(buf, "%d", ++num); |
| 376 | page->number = ufroma_dup(buf); |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Now we're ready to actually lay out the pages. We do this by |
| 382 | * looping over _paragraphs_, since we may need to track cross- |
| 383 | * references between lines and even across pages. |
| 384 | */ |
| 385 | for (pdata = firstpara; pdata; pdata = pdata->next) { |
| 386 | int last_x; |
| 387 | xref *cxref; |
| 388 | page_data *cxref_page; |
| 389 | xref_dest dest; |
| 390 | para_data *target; |
| 391 | |
| 392 | dest.type = NONE; |
| 393 | cxref = NULL; |
| 394 | cxref_page = NULL; |
| 395 | |
| 396 | for (ldata = pdata->first; ldata; ldata = ldata->next) { |
| 397 | /* |
| 398 | * If this is a contents entry, we expect to have a single |
| 399 | * enormous cross-reference rectangle covering the whole |
| 400 | * thing. (Unless, of course, it spans multiple pages.) |
| 401 | */ |
| 402 | if (pdata->contents_entry && ldata->page != cxref_page) { |
| 403 | cxref_page = ldata->page; |
| 404 | cxref = mknew(xref); |
| 405 | cxref->next = NULL; |
| 406 | cxref->dest.type = PAGE; |
| 407 | assert(pdata->contents_entry->private_data); |
| 408 | target = (para_data *)pdata->contents_entry->private_data; |
| 409 | cxref->dest.page = target->first->page; |
| 410 | cxref->dest.url = NULL; |
| 411 | if (ldata->page->last_xref) |
| 412 | ldata->page->last_xref->next = cxref; |
| 413 | else |
| 414 | ldata->page->first_xref = cxref; |
| 415 | ldata->page->last_xref = cxref; |
| 416 | cxref->lx = conf->left_margin; |
| 417 | cxref->rx = conf->paper_width - conf->right_margin; |
| 418 | cxref->ty = conf->paper_height - conf->top_margin |
| 419 | - ldata->ypos + ldata->line_height; |
| 420 | } |
| 421 | if (pdata->contents_entry) { |
| 422 | assert(cxref != NULL); |
| 423 | cxref->by = conf->paper_height - conf->top_margin |
| 424 | - ldata->ypos; |
| 425 | } |
| 426 | |
| 427 | last_x = render_line(ldata, conf->left_margin, |
| 428 | conf->paper_height - conf->top_margin, |
| 429 | &dest, keywords); |
| 430 | if (ldata == pdata->last) |
| 431 | break; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * If this is a contents entry, add leaders and a page |
| 436 | * number. |
| 437 | */ |
| 438 | if (pdata->contents_entry) { |
| 439 | word *w; |
| 440 | wchar_t *num; |
| 441 | int wid; |
| 442 | int x; |
| 443 | |
| 444 | assert(pdata->contents_entry->private_data); |
| 445 | target = (para_data *)pdata->contents_entry->private_data; |
| 446 | num = target->first->page->number; |
| 447 | |
| 448 | w = fake_word(num); |
| 449 | wid = paper_width_simple(pdata, w); |
| 450 | sfree(w); |
| 451 | |
| 452 | render_string(pdata->last->page, |
| 453 | pdata->fonts[FONT_NORMAL], |
| 454 | pdata->sizes[FONT_NORMAL], |
| 455 | conf->paper_width - conf->right_margin - wid, |
| 456 | (conf->paper_height - conf->top_margin - |
| 457 | pdata->last->ypos), num); |
| 458 | |
| 459 | for (x = 0; x < conf->base_width; x += conf->leader_separation) |
| 460 | if (x - conf->leader_separation > last_x - conf->left_margin && |
| 461 | x + conf->leader_separation < conf->base_width - wid) |
| 462 | render_string(pdata->last->page, |
| 463 | pdata->fonts[FONT_NORMAL], |
| 464 | pdata->sizes[FONT_NORMAL], |
| 465 | conf->left_margin + x, |
| 466 | (conf->paper_height - conf->top_margin - |
| 467 | pdata->last->ypos), L"."); |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * Render any rectangle (chapter title underline or rule) |
| 472 | * that goes with this paragraph. |
| 473 | */ |
| 474 | switch (pdata->rect_type) { |
| 475 | case RECT_CHAPTER_UNDERLINE: |
| 476 | add_rect_to_page(pdata->last->page, |
| 477 | conf->left_margin, |
| 478 | (conf->paper_height - conf->top_margin - |
| 479 | pdata->last->ypos - |
| 480 | conf->chapter_underline_depth), |
| 481 | conf->base_width, |
| 482 | conf->chapter_underline_thickness); |
| 483 | break; |
| 484 | case RECT_RULE: |
| 485 | add_rect_to_page(pdata->first->page, |
| 486 | conf->left_margin + pdata->first->xpos, |
| 487 | (conf->paper_height - conf->top_margin - |
| 488 | pdata->last->ypos - |
| 489 | pdata->last->line_height), |
| 490 | conf->base_width - pdata->first->xpos, |
| 491 | pdata->last->line_height); |
| 492 | break; |
| 493 | default: /* placate gcc */ |
| 494 | break; |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Start putting together the overall document structure we're |
| 500 | * going to return. |
| 501 | */ |
| 502 | doc = mknew(document); |
| 503 | doc->fonts = fontlist; |
| 504 | doc->pages = pages; |
| 505 | doc->paper_width = conf->paper_width; |
| 506 | doc->paper_height = conf->paper_height; |
| 507 | |
| 508 | /* |
| 509 | * Collect the section heading paragraphs into a document |
| 510 | * outline. This is slightly fiddly because the Title paragraph |
| 511 | * isn't required to be at the start, although all the others |
| 512 | * must be in order. |
| 513 | */ |
| 514 | { |
| 515 | int osize = 20; |
| 516 | |
| 517 | doc->outline_elements = mknewa(outline_element, osize); |
| 518 | doc->n_outline_elements = 0; |
| 519 | |
| 520 | /* First find the title. */ |
| 521 | for (pdata = firstpara; pdata; pdata = pdata->next) { |
| 522 | if (pdata->outline_level == 0) { |
| 523 | doc->outline_elements[0].level = 0; |
| 524 | doc->outline_elements[0].pdata = pdata; |
| 525 | doc->n_outline_elements++; |
| 526 | break; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /* Then collect the rest. */ |
| 531 | for (pdata = firstpara; pdata; pdata = pdata->next) { |
| 532 | if (pdata->outline_level > 0) { |
| 533 | if (doc->n_outline_elements >= osize) { |
| 534 | osize += 20; |
| 535 | doc->outline_elements = |
| 536 | resize(doc->outline_elements, osize); |
| 537 | } |
| 538 | |
| 539 | doc->outline_elements[doc->n_outline_elements].level = |
| 540 | pdata->outline_level; |
| 541 | doc->outline_elements[doc->n_outline_elements].pdata = pdata; |
| 542 | doc->n_outline_elements++; |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | sfree(conf); |
| 548 | |
| 549 | return doc; |
| 550 | } |
| 551 | |
| 552 | static para_data *make_para_data(int ptype, int paux, int indent, int rmargin, |
| 553 | word *pkwtext, word *pkwtext2, word *pwords, |
| 554 | paper_conf *conf) |
| 555 | { |
| 556 | para_data *pdata; |
| 557 | line_data *ldata; |
| 558 | int extra_indent, firstline_indent, aux_indent; |
| 559 | word *aux, *aux2; |
| 560 | |
| 561 | pdata = mknew(para_data); |
| 562 | pdata->outline_level = -1; |
| 563 | pdata->outline_title = NULL; |
| 564 | pdata->rect_type = RECT_NONE; |
| 565 | pdata->contents_entry = NULL; |
| 566 | |
| 567 | /* |
| 568 | * Choose fonts for this paragraph. |
| 569 | * |
| 570 | * FIXME: All of this ought to be completely |
| 571 | * user-configurable. |
| 572 | */ |
| 573 | switch (ptype) { |
| 574 | case para_Title: |
| 575 | pdata->fonts[FONT_NORMAL] = conf->hr; |
| 576 | pdata->sizes[FONT_NORMAL] = 24; |
| 577 | pdata->fonts[FONT_EMPH] = conf->hi; |
| 578 | pdata->sizes[FONT_EMPH] = 24; |
| 579 | pdata->fonts[FONT_CODE] = conf->cb; |
| 580 | pdata->sizes[FONT_CODE] = 24; |
| 581 | pdata->outline_level = 0; |
| 582 | break; |
| 583 | |
| 584 | case para_Chapter: |
| 585 | case para_Appendix: |
| 586 | case para_UnnumberedChapter: |
| 587 | pdata->fonts[FONT_NORMAL] = conf->hr; |
| 588 | pdata->sizes[FONT_NORMAL] = 20; |
| 589 | pdata->fonts[FONT_EMPH] = conf->hi; |
| 590 | pdata->sizes[FONT_EMPH] = 20; |
| 591 | pdata->fonts[FONT_CODE] = conf->cb; |
| 592 | pdata->sizes[FONT_CODE] = 20; |
| 593 | pdata->outline_level = 1; |
| 594 | break; |
| 595 | |
| 596 | case para_Heading: |
| 597 | case para_Subsect: |
| 598 | pdata->fonts[FONT_NORMAL] = conf->hr; |
| 599 | pdata->fonts[FONT_EMPH] = conf->hi; |
| 600 | pdata->fonts[FONT_CODE] = conf->cb; |
| 601 | pdata->sizes[FONT_NORMAL] = |
| 602 | pdata->sizes[FONT_EMPH] = |
| 603 | pdata->sizes[FONT_CODE] = |
| 604 | (paux == 0 ? 16 : paux == 1 ? 14 : 13); |
| 605 | pdata->outline_level = 2 + paux; |
| 606 | break; |
| 607 | |
| 608 | case para_Normal: |
| 609 | case para_BiblioCited: |
| 610 | case para_Bullet: |
| 611 | case para_NumberedList: |
| 612 | case para_DescribedThing: |
| 613 | case para_Description: |
| 614 | case para_Copyright: |
| 615 | pdata->fonts[FONT_NORMAL] = conf->tr; |
| 616 | pdata->sizes[FONT_NORMAL] = 12; |
| 617 | pdata->fonts[FONT_EMPH] = conf->ti; |
| 618 | pdata->sizes[FONT_EMPH] = 12; |
| 619 | pdata->fonts[FONT_CODE] = conf->cr; |
| 620 | pdata->sizes[FONT_CODE] = 12; |
| 621 | break; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Also select an indentation level depending on the |
| 626 | * paragraph type (list paragraphs other than |
| 627 | * para_DescribedThing need extra indent). |
| 628 | * |
| 629 | * (FIXME: Perhaps at some point we might even arrange |
| 630 | * for the user to be able to request indented first |
| 631 | * lines in paragraphs.) |
| 632 | */ |
| 633 | if (ptype == para_Bullet || |
| 634 | ptype == para_NumberedList || |
| 635 | ptype == para_Description) { |
| 636 | extra_indent = firstline_indent = conf->indent_list; |
| 637 | } else { |
| 638 | extra_indent = firstline_indent = 0; |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Find the auxiliary text for this paragraph. |
| 643 | */ |
| 644 | aux = aux2 = NULL; |
| 645 | aux_indent = 0; |
| 646 | |
| 647 | switch (ptype) { |
| 648 | case para_Chapter: |
| 649 | case para_Appendix: |
| 650 | case para_Heading: |
| 651 | case para_Subsect: |
| 652 | /* |
| 653 | * For some heading styles (FIXME: be able to |
| 654 | * configure which), the auxiliary text contains |
| 655 | * the chapter number and is arranged to be |
| 656 | * right-aligned a few points left of the primary |
| 657 | * margin. For other styles, the auxiliary text is |
| 658 | * the full chapter _name_ and takes up space |
| 659 | * within the (wrapped) chapter title, meaning that |
| 660 | * we must move the first line indent over to make |
| 661 | * space for it. |
| 662 | */ |
| 663 | if (ptype == para_Heading || ptype == para_Subsect) { |
| 664 | int len; |
| 665 | |
| 666 | aux = pkwtext2; |
| 667 | len = paper_width_simple(pdata, pkwtext2); |
| 668 | aux_indent = -len - conf->sect_num_left_space; |
| 669 | |
| 670 | pdata->outline_title = |
| 671 | prepare_outline_title(pkwtext2, L" ", pwords); |
| 672 | } else { |
| 673 | aux = pkwtext; |
| 674 | aux2 = fake_word(L": "); |
| 675 | aux_indent = 0; |
| 676 | |
| 677 | firstline_indent += paper_width_simple(pdata, aux); |
| 678 | firstline_indent += paper_width_simple(pdata, aux2); |
| 679 | |
| 680 | pdata->outline_title = |
| 681 | prepare_outline_title(pkwtext, L": ", pwords); |
| 682 | } |
| 683 | break; |
| 684 | |
| 685 | case para_Bullet: |
| 686 | /* |
| 687 | * Auxiliary text consisting of a bullet. (FIXME: |
| 688 | * configurable bullet.) |
| 689 | */ |
| 690 | aux = fake_word(L"\x2022"); |
| 691 | aux_indent = indent + conf->indent_list_bullet; |
| 692 | break; |
| 693 | |
| 694 | case para_NumberedList: |
| 695 | /* |
| 696 | * Auxiliary text consisting of the number followed |
| 697 | * by a (FIXME: configurable) full stop. |
| 698 | */ |
| 699 | aux = pkwtext; |
| 700 | aux2 = fake_word(L"."); |
| 701 | aux_indent = indent + conf->indent_list_bullet; |
| 702 | break; |
| 703 | |
| 704 | case para_BiblioCited: |
| 705 | /* |
| 706 | * Auxiliary text consisting of the bibliography |
| 707 | * reference text, and a trailing space. |
| 708 | */ |
| 709 | aux = pkwtext; |
| 710 | aux2 = fake_word(L" "); |
| 711 | aux_indent = indent; |
| 712 | firstline_indent += paper_width_simple(pdata, aux); |
| 713 | firstline_indent += paper_width_simple(pdata, aux2); |
| 714 | break; |
| 715 | } |
| 716 | |
| 717 | if (pdata->outline_level >= 0 && !pdata->outline_title) { |
| 718 | pdata->outline_title = |
| 719 | prepare_outline_title(NULL, NULL, pwords); |
| 720 | } |
| 721 | |
| 722 | wrap_paragraph(pdata, pwords, conf->base_width - rmargin, |
| 723 | indent + firstline_indent, |
| 724 | indent + extra_indent); |
| 725 | |
| 726 | pdata->first->aux_text = aux; |
| 727 | pdata->first->aux_text_2 = aux2; |
| 728 | pdata->first->aux_left_indent = aux_indent; |
| 729 | |
| 730 | /* |
| 731 | * Line breaking penalties. |
| 732 | */ |
| 733 | switch (ptype) { |
| 734 | case para_Chapter: |
| 735 | case para_Appendix: |
| 736 | case para_Heading: |
| 737 | case para_Subsect: |
| 738 | case para_UnnumberedChapter: |
| 739 | /* |
| 740 | * Fixed and large penalty for breaking straight |
| 741 | * after a heading; corresponding bonus for |
| 742 | * breaking straight before. |
| 743 | */ |
| 744 | pdata->first->penalty_before = -500000; |
| 745 | pdata->last->penalty_after = 500000; |
| 746 | for (ldata = pdata->first; ldata; ldata = ldata->next) |
| 747 | ldata->penalty_after = 500000; |
| 748 | break; |
| 749 | |
| 750 | case para_DescribedThing: |
| 751 | /* |
| 752 | * This is treated a bit like a small heading: |
| 753 | * there's a penalty for breaking after it (i.e. |
| 754 | * between it and its description), and a bonus for |
| 755 | * breaking before it (actually _between_ list |
| 756 | * items). |
| 757 | */ |
| 758 | pdata->first->penalty_before = -200000; |
| 759 | pdata->last->penalty_after = 200000; |
| 760 | break; |
| 761 | |
| 762 | default: |
| 763 | /* |
| 764 | * Most paragraph types: widow/orphan control by |
| 765 | * discouraging breaking one line from the end of |
| 766 | * any paragraph. |
| 767 | */ |
| 768 | if (pdata->first != pdata->last) { |
| 769 | pdata->first->penalty_after = 100000; |
| 770 | pdata->last->penalty_before = 100000; |
| 771 | } |
| 772 | break; |
| 773 | } |
| 774 | |
| 775 | standard_line_spacing(pdata, conf); |
| 776 | |
| 777 | /* |
| 778 | * Some kinds of section heading require a page break before |
| 779 | * them and an underline after. |
| 780 | */ |
| 781 | if (ptype == para_Title || |
| 782 | ptype == para_Chapter || |
| 783 | ptype == para_Appendix || |
| 784 | ptype == para_UnnumberedChapter) { |
| 785 | pdata->first->page_break = TRUE; |
| 786 | pdata->first->space_before = conf->chapter_top_space; |
| 787 | pdata->last->space_after += |
| 788 | (conf->chapter_underline_depth + |
| 789 | conf->chapter_underline_thickness); |
| 790 | pdata->rect_type = RECT_CHAPTER_UNDERLINE; |
| 791 | } |
| 792 | |
| 793 | return pdata; |
| 794 | } |
| 795 | |
| 796 | static void standard_line_spacing(para_data *pdata, paper_conf *conf) |
| 797 | { |
| 798 | line_data *ldata; |
| 799 | |
| 800 | /* |
| 801 | * Set the line spacing for each line in this paragraph. |
| 802 | */ |
| 803 | for (ldata = pdata->first; ldata; ldata = ldata->next) { |
| 804 | if (ldata == pdata->first) |
| 805 | ldata->space_before = conf->base_para_spacing / 2; |
| 806 | else |
| 807 | ldata->space_before = conf->base_leading / 2; |
| 808 | if (ldata == pdata->last) |
| 809 | ldata->space_after = conf->base_para_spacing / 2; |
| 810 | else |
| 811 | ldata->space_after = conf->base_leading / 2; |
| 812 | ldata->page_break = FALSE; |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | static font_encoding *new_font_encoding(font_data *font) |
| 817 | { |
| 818 | font_encoding *fe; |
| 819 | int i; |
| 820 | |
| 821 | fe = mknew(font_encoding); |
| 822 | fe->next = NULL; |
| 823 | |
| 824 | if (font->list->tail) |
| 825 | font->list->tail->next = fe; |
| 826 | else |
| 827 | font->list->head = fe; |
| 828 | font->list->tail = fe; |
| 829 | |
| 830 | fe->font = font; |
| 831 | fe->free_pos = 0x21; |
| 832 | |
| 833 | for (i = 0; i < 256; i++) { |
| 834 | fe->vector[i] = NULL; |
| 835 | fe->indices[i] = -1; |
| 836 | fe->to_unicode[i] = 0xFFFF; |
| 837 | } |
| 838 | |
| 839 | return fe; |
| 840 | } |
| 841 | |
| 842 | static font_data *make_std_font(font_list *fontlist, char const *name) |
| 843 | { |
| 844 | const int *widths; |
| 845 | int nglyphs; |
| 846 | font_data *f; |
| 847 | font_encoding *fe; |
| 848 | int i; |
| 849 | |
| 850 | widths = ps_std_font_widths(name); |
| 851 | if (!widths) |
| 852 | return NULL; |
| 853 | |
| 854 | for (nglyphs = 0; ps_std_glyphs[nglyphs] != NULL; nglyphs++); |
| 855 | |
| 856 | f = mknew(font_data); |
| 857 | |
| 858 | f->list = fontlist; |
| 859 | f->name = name; |
| 860 | f->nglyphs = nglyphs; |
| 861 | f->glyphs = ps_std_glyphs; |
| 862 | f->widths = widths; |
| 863 | f->subfont_map = mknewa(subfont_map_entry, nglyphs); |
| 864 | |
| 865 | /* |
| 866 | * Our first subfont will contain all of US-ASCII. This isn't |
| 867 | * really necessary - we could just create custom subfonts |
| 868 | * precisely as the whim of render_string dictated - but |
| 869 | * instinct suggests that it might be nice to have the text in |
| 870 | * the output files look _marginally_ recognisable. |
| 871 | */ |
| 872 | fe = new_font_encoding(f); |
| 873 | fe->free_pos = 0xA1; /* only the top half is free */ |
| 874 | f->latest_subfont = fe; |
| 875 | |
| 876 | for (i = 0; i < (int)lenof(f->bmp); i++) |
| 877 | f->bmp[i] = 0xFFFF; |
| 878 | |
| 879 | for (i = 0; i < nglyphs; i++) { |
| 880 | wchar_t ucs; |
| 881 | ucs = ps_glyph_to_unicode(f->glyphs[i]); |
| 882 | assert(ucs != 0xFFFF); |
| 883 | f->bmp[ucs] = i; |
| 884 | if (ucs >= 0x20 && ucs <= 0x7E) { |
| 885 | fe->vector[ucs] = f->glyphs[i]; |
| 886 | fe->indices[ucs] = i; |
| 887 | fe->to_unicode[ucs] = ucs; |
| 888 | f->subfont_map[i].subfont = fe; |
| 889 | f->subfont_map[i].position = ucs; |
| 890 | } else { |
| 891 | /* |
| 892 | * This character is not yet assigned to a subfont. |
| 893 | */ |
| 894 | f->subfont_map[i].subfont = NULL; |
| 895 | f->subfont_map[i].position = 0; |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | return f; |
| 900 | } |
| 901 | |
| 902 | static int string_width(font_data *font, wchar_t const *string, int *errs) |
| 903 | { |
| 904 | int width = 0; |
| 905 | |
| 906 | if (errs) |
| 907 | *errs = 0; |
| 908 | |
| 909 | for (; *string; string++) { |
| 910 | int index; |
| 911 | |
| 912 | index = font->bmp[(unsigned short)*string]; |
| 913 | if (index == 0xFFFF) { |
| 914 | if (errs) |
| 915 | *errs = 1; |
| 916 | } else { |
| 917 | width += font->widths[index]; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | return width; |
| 922 | } |
| 923 | |
| 924 | static int paper_width_internal(void *vctx, word *word, int *nspaces); |
| 925 | |
| 926 | struct paper_width_ctx { |
| 927 | int minspacewidth; |
| 928 | para_data *pdata; |
| 929 | }; |
| 930 | |
| 931 | static int paper_width_list(void *vctx, word *text, word *end, int *nspaces) { |
| 932 | int w = 0; |
| 933 | while (text && text != end) { |
| 934 | w += paper_width_internal(vctx, text, nspaces); |
| 935 | text = text->next; |
| 936 | } |
| 937 | return w; |
| 938 | } |
| 939 | |
| 940 | static int paper_width_internal(void *vctx, word *word, int *nspaces) |
| 941 | { |
| 942 | struct paper_width_ctx *ctx = (struct paper_width_ctx *)vctx; |
| 943 | int style, type, findex, width, errs; |
| 944 | wchar_t *str; |
| 945 | |
| 946 | switch (word->type) { |
| 947 | case word_HyperLink: |
| 948 | case word_HyperEnd: |
| 949 | case word_UpperXref: |
| 950 | case word_LowerXref: |
| 951 | case word_XrefEnd: |
| 952 | case word_IndexRef: |
| 953 | return 0; |
| 954 | } |
| 955 | |
| 956 | style = towordstyle(word->type); |
| 957 | type = removeattr(word->type); |
| 958 | |
| 959 | findex = (style == word_Normal ? FONT_NORMAL : |
| 960 | style == word_Emph ? FONT_EMPH : |
| 961 | FONT_CODE); |
| 962 | |
| 963 | if (type == word_Normal) { |
| 964 | str = word->text; |
| 965 | } else if (type == word_WhiteSpace) { |
| 966 | if (findex != FONT_CODE) { |
| 967 | if (nspaces) |
| 968 | (*nspaces)++; |
| 969 | return ctx->minspacewidth; |
| 970 | } else |
| 971 | str = L" "; |
| 972 | } else /* if (type == word_Quote) */ { |
| 973 | if (word->aux == quote_Open) |
| 974 | str = L"\x2018"; /* FIXME: configurability! */ |
| 975 | else |
| 976 | str = L"\x2019"; /* FIXME: configurability! */ |
| 977 | } |
| 978 | |
| 979 | width = string_width(ctx->pdata->fonts[findex], str, &errs); |
| 980 | |
| 981 | if (errs && word->alt) |
| 982 | return paper_width_list(vctx, word->alt, NULL, nspaces); |
| 983 | else |
| 984 | return ctx->pdata->sizes[findex] * width; |
| 985 | } |
| 986 | |
| 987 | static int paper_width(void *vctx, word *word) |
| 988 | { |
| 989 | return paper_width_internal(vctx, word, NULL); |
| 990 | } |
| 991 | |
| 992 | static int paper_width_simple(para_data *pdata, word *text) |
| 993 | { |
| 994 | struct paper_width_ctx ctx; |
| 995 | |
| 996 | ctx.pdata = pdata; |
| 997 | ctx.minspacewidth = |
| 998 | (pdata->sizes[FONT_NORMAL] * |
| 999 | string_width(pdata->fonts[FONT_NORMAL], L" ", NULL)); |
| 1000 | |
| 1001 | return paper_width_list(&ctx, text, NULL, NULL); |
| 1002 | } |
| 1003 | |
| 1004 | static void wrap_paragraph(para_data *pdata, word *words, |
| 1005 | int w, int i1, int i2) |
| 1006 | { |
| 1007 | wrappedline *wrapping, *p; |
| 1008 | int spacewidth; |
| 1009 | struct paper_width_ctx ctx; |
| 1010 | int line_height; |
| 1011 | |
| 1012 | /* |
| 1013 | * We're going to need to store the line height in every line |
| 1014 | * structure we generate. |
| 1015 | */ |
| 1016 | { |
| 1017 | int i; |
| 1018 | line_height = 0; |
| 1019 | for (i = 0; i < NFONTS; i++) |
| 1020 | if (line_height < pdata->sizes[i]) |
| 1021 | line_height = pdata->sizes[i]; |
| 1022 | line_height *= 4096; |
| 1023 | } |
| 1024 | |
| 1025 | spacewidth = (pdata->sizes[FONT_NORMAL] * |
| 1026 | string_width(pdata->fonts[FONT_NORMAL], L" ", NULL)); |
| 1027 | if (spacewidth == 0) { |
| 1028 | /* |
| 1029 | * A font without a space?! Disturbing. I hope this never |
| 1030 | * comes up, but I'll make a random guess anyway and set my |
| 1031 | * space width to half the point size. |
| 1032 | */ |
| 1033 | spacewidth = pdata->sizes[FONT_NORMAL] * 4096 / 2; |
| 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * I'm going to set the _minimum_ space width to 3/5 of the |
| 1038 | * standard one, and use the standard one as the optimum. |
| 1039 | */ |
| 1040 | ctx.minspacewidth = spacewidth * 3 / 5; |
| 1041 | ctx.pdata = pdata; |
| 1042 | |
| 1043 | wrapping = wrap_para(words, w - i1, w - i2, paper_width, &ctx, spacewidth); |
| 1044 | |
| 1045 | /* |
| 1046 | * Having done the wrapping, we now concoct a set of line_data |
| 1047 | * structures. |
| 1048 | */ |
| 1049 | pdata->first = pdata->last = NULL; |
| 1050 | |
| 1051 | for (p = wrapping; p; p = p->next) { |
| 1052 | line_data *ldata; |
| 1053 | word *wd; |
| 1054 | int len, wid, spaces; |
| 1055 | |
| 1056 | ldata = mknew(line_data); |
| 1057 | |
| 1058 | ldata->pdata = pdata; |
| 1059 | ldata->first = p->begin; |
| 1060 | ldata->end = p->end; |
| 1061 | ldata->line_height = line_height; |
| 1062 | |
| 1063 | ldata->xpos = (p == wrapping ? i1 : i2); |
| 1064 | |
| 1065 | if (pdata->last) { |
| 1066 | pdata->last->next = ldata; |
| 1067 | ldata->prev = pdata->last; |
| 1068 | } else { |
| 1069 | pdata->first = ldata; |
| 1070 | ldata->prev = NULL; |
| 1071 | } |
| 1072 | ldata->next = NULL; |
| 1073 | pdata->last = ldata; |
| 1074 | |
| 1075 | spaces = 0; |
| 1076 | len = paper_width_list(&ctx, ldata->first, ldata->end, &spaces); |
| 1077 | wid = (p == wrapping ? w - i1 : w - i2); |
| 1078 | wd = ldata->first; |
| 1079 | |
| 1080 | ldata->hshortfall = wid - len; |
| 1081 | ldata->nspaces = spaces; |
| 1082 | /* |
| 1083 | * This tells us how much the space width needs to |
| 1084 | * change from _min_spacewidth. But we want to store |
| 1085 | * its difference from the _natural_ space width, to |
| 1086 | * make the text rendering easier. |
| 1087 | */ |
| 1088 | ldata->hshortfall += ctx.minspacewidth * spaces; |
| 1089 | ldata->hshortfall -= spacewidth * spaces; |
| 1090 | /* |
| 1091 | * Special case: on the last line of a paragraph, we |
| 1092 | * never stretch spaces. |
| 1093 | */ |
| 1094 | if (ldata->hshortfall > 0 && !p->next) |
| 1095 | ldata->hshortfall = 0; |
| 1096 | |
| 1097 | ldata->aux_text = NULL; |
| 1098 | ldata->aux_text_2 = NULL; |
| 1099 | ldata->aux_left_indent = 0; |
| 1100 | ldata->penalty_before = ldata->penalty_after = 0; |
| 1101 | } |
| 1102 | |
| 1103 | } |
| 1104 | |
| 1105 | static page_data *page_breaks(line_data *first, line_data *last, |
| 1106 | int page_height) |
| 1107 | { |
| 1108 | line_data *l, *m; |
| 1109 | page_data *ph, *pt; |
| 1110 | |
| 1111 | /* |
| 1112 | * Page breaking is done by a close analogue of the optimal |
| 1113 | * paragraph wrapping algorithm used by wrap_para(). We work |
| 1114 | * backwards from the end of the document line by line; for |
| 1115 | * each line, we contemplate every possible number of lines we |
| 1116 | * could put on a page starting with that line, determine a |
| 1117 | * cost function for each one, add it to the pre-computed cost |
| 1118 | * function for optimally page-breaking everything after that |
| 1119 | * page, and pick the best option. |
| 1120 | * |
| 1121 | * Since my line_data structures are only used for this |
| 1122 | * purpose, I might as well just store the algorithm data |
| 1123 | * directly in them. |
| 1124 | */ |
| 1125 | |
| 1126 | for (l = last; l; l = l->prev) { |
| 1127 | int minheight, text = 0, space = 0; |
| 1128 | int cost; |
| 1129 | |
| 1130 | l->bestcost = -1; |
| 1131 | for (m = l; m; m = m->next) { |
| 1132 | if (m != l && m->page_break) |
| 1133 | break; /* we've gone as far as we can */ |
| 1134 | |
| 1135 | if (m != l) |
| 1136 | space += m->prev->space_after; |
| 1137 | if (m != l || m->page_break) |
| 1138 | space += m->space_before; |
| 1139 | text += m->line_height; |
| 1140 | minheight = text + space; |
| 1141 | |
| 1142 | if (m != l && minheight > page_height) |
| 1143 | break; |
| 1144 | |
| 1145 | /* |
| 1146 | * Compute the cost of this arrangement, as the square |
| 1147 | * of the amount of wasted space on the page. |
| 1148 | * Exception: if this is the last page before a |
| 1149 | * mandatory break or the document end, we don't |
| 1150 | * penalise a large blank area. |
| 1151 | */ |
| 1152 | if (m->next && !m->next->page_break) |
| 1153 | { |
| 1154 | int x = page_height - minheight; |
| 1155 | int xf; |
| 1156 | |
| 1157 | xf = x & 0xFF; |
| 1158 | x >>= 8; |
| 1159 | |
| 1160 | cost = x*x; |
| 1161 | cost += (x * xf) >> 8; |
| 1162 | } else |
| 1163 | cost = 0; |
| 1164 | |
| 1165 | if (m->next && !m->next->page_break) { |
| 1166 | cost += m->penalty_after; |
| 1167 | cost += m->next->penalty_before; |
| 1168 | } |
| 1169 | |
| 1170 | if (m->next && !m->next->page_break) |
| 1171 | cost += m->next->bestcost; |
| 1172 | if (l->bestcost == -1 || l->bestcost > cost) { |
| 1173 | /* |
| 1174 | * This is the best option yet for this starting |
| 1175 | * point. |
| 1176 | */ |
| 1177 | l->bestcost = cost; |
| 1178 | if (m->next && !m->next->page_break) |
| 1179 | l->vshortfall = page_height - minheight; |
| 1180 | else |
| 1181 | l->vshortfall = 0; |
| 1182 | l->text = text; |
| 1183 | l->space = space; |
| 1184 | l->page_last = m; |
| 1185 | } |
| 1186 | } |
| 1187 | } |
| 1188 | |
| 1189 | /* |
| 1190 | * Now go through the line list forwards and assemble the |
| 1191 | * actual pages. |
| 1192 | */ |
| 1193 | ph = pt = NULL; |
| 1194 | |
| 1195 | l = first; |
| 1196 | while (l) { |
| 1197 | page_data *page; |
| 1198 | int text, space; |
| 1199 | |
| 1200 | page = mknew(page_data); |
| 1201 | page->next = NULL; |
| 1202 | page->prev = pt; |
| 1203 | if (pt) |
| 1204 | pt->next = page; |
| 1205 | else |
| 1206 | ph = page; |
| 1207 | pt = page; |
| 1208 | |
| 1209 | page->first_line = l; |
| 1210 | page->last_line = l->page_last; |
| 1211 | |
| 1212 | page->first_text = page->last_text = NULL; |
| 1213 | page->first_xref = page->last_xref = NULL; |
| 1214 | page->first_rect = page->last_rect = NULL; |
| 1215 | |
| 1216 | /* |
| 1217 | * Now assign a y-coordinate to each line on the page. |
| 1218 | */ |
| 1219 | text = space = 0; |
| 1220 | for (l = page->first_line; l; l = l->next) { |
| 1221 | if (l != page->first_line) |
| 1222 | space += l->prev->space_after; |
| 1223 | if (l != page->first_line || l->page_break) |
| 1224 | space += l->space_before; |
| 1225 | text += l->line_height; |
| 1226 | |
| 1227 | l->page = page; |
| 1228 | l->ypos = text + space + |
| 1229 | space * (float)page->first_line->vshortfall / |
| 1230 | page->first_line->space; |
| 1231 | |
| 1232 | if (l == page->last_line) |
| 1233 | break; |
| 1234 | } |
| 1235 | |
| 1236 | l = page->last_line->next; |
| 1237 | } |
| 1238 | |
| 1239 | return ph; |
| 1240 | } |
| 1241 | |
| 1242 | static void add_rect_to_page(page_data *page, int x, int y, int w, int h) |
| 1243 | { |
| 1244 | rect *r = mknew(rect); |
| 1245 | |
| 1246 | r->next = NULL; |
| 1247 | if (page->last_rect) |
| 1248 | page->last_rect->next = r; |
| 1249 | else |
| 1250 | page->first_rect = r; |
| 1251 | page->last_rect = r; |
| 1252 | |
| 1253 | r->x = x; |
| 1254 | r->y = y; |
| 1255 | r->w = w; |
| 1256 | r->h = h; |
| 1257 | } |
| 1258 | |
| 1259 | static void add_string_to_page(page_data *page, int x, int y, |
| 1260 | font_encoding *fe, int size, char *text) |
| 1261 | { |
| 1262 | text_fragment *frag; |
| 1263 | |
| 1264 | frag = mknew(text_fragment); |
| 1265 | frag->next = NULL; |
| 1266 | |
| 1267 | if (page->last_text) |
| 1268 | page->last_text->next = frag; |
| 1269 | else |
| 1270 | page->first_text = frag; |
| 1271 | page->last_text = frag; |
| 1272 | |
| 1273 | frag->x = x; |
| 1274 | frag->y = y; |
| 1275 | frag->fe = fe; |
| 1276 | frag->fontsize = size; |
| 1277 | frag->text = dupstr(text); |
| 1278 | } |
| 1279 | |
| 1280 | /* |
| 1281 | * Returns the updated x coordinate. |
| 1282 | */ |
| 1283 | static int render_string(page_data *page, font_data *font, int fontsize, |
| 1284 | int x, int y, wchar_t *str) |
| 1285 | { |
| 1286 | char *text; |
| 1287 | int textpos, textwid, glyph; |
| 1288 | font_encoding *subfont = NULL, *sf; |
| 1289 | |
| 1290 | text = mknewa(char, 1 + ustrlen(str)); |
| 1291 | textpos = textwid = 0; |
| 1292 | |
| 1293 | while (*str) { |
| 1294 | glyph = font->bmp[*str]; |
| 1295 | |
| 1296 | if (glyph == 0xFFFF) |
| 1297 | continue; /* nothing more we can do here */ |
| 1298 | |
| 1299 | /* |
| 1300 | * Find which subfont this character is going in. |
| 1301 | */ |
| 1302 | sf = font->subfont_map[glyph].subfont; |
| 1303 | |
| 1304 | if (!sf) { |
| 1305 | int c; |
| 1306 | |
| 1307 | /* |
| 1308 | * This character is not yet in a subfont. Assign one. |
| 1309 | */ |
| 1310 | if (font->latest_subfont->free_pos >= 0x100) |
| 1311 | font->latest_subfont = new_font_encoding(font); |
| 1312 | |
| 1313 | c = font->latest_subfont->free_pos++; |
| 1314 | if (font->latest_subfont->free_pos == 0x7F) |
| 1315 | font->latest_subfont->free_pos = 0xA1; |
| 1316 | |
| 1317 | font->subfont_map[glyph].subfont = font->latest_subfont; |
| 1318 | font->subfont_map[glyph].position = c; |
| 1319 | font->latest_subfont->vector[c] = font->glyphs[glyph]; |
| 1320 | font->latest_subfont->indices[c] = glyph; |
| 1321 | font->latest_subfont->to_unicode[c] = *str; |
| 1322 | |
| 1323 | sf = font->latest_subfont; |
| 1324 | } |
| 1325 | |
| 1326 | if (!subfont || sf != subfont) { |
| 1327 | if (subfont) { |
| 1328 | text[textpos] = '\0'; |
| 1329 | add_string_to_page(page, x, y, subfont, fontsize, text); |
| 1330 | x += textwid; |
| 1331 | } else { |
| 1332 | assert(textpos == 0); |
| 1333 | } |
| 1334 | textpos = 0; |
| 1335 | subfont = sf; |
| 1336 | } |
| 1337 | |
| 1338 | text[textpos++] = font->subfont_map[glyph].position; |
| 1339 | textwid += font->widths[glyph] * fontsize; |
| 1340 | |
| 1341 | str++; |
| 1342 | } |
| 1343 | |
| 1344 | if (textpos > 0) { |
| 1345 | text[textpos] = '\0'; |
| 1346 | add_string_to_page(page, x, y, subfont, fontsize, text); |
| 1347 | x += textwid; |
| 1348 | } |
| 1349 | |
| 1350 | return x; |
| 1351 | } |
| 1352 | |
| 1353 | /* |
| 1354 | * Returns the updated x coordinate. |
| 1355 | */ |
| 1356 | static int render_text(page_data *page, para_data *pdata, line_data *ldata, |
| 1357 | int x, int y, word *text, word *text_end, xref **xr, |
| 1358 | int shortfall, int nspaces, int *nspace, |
| 1359 | keywordlist *keywords) |
| 1360 | { |
| 1361 | while (text && text != text_end) { |
| 1362 | int style, type, findex, errs; |
| 1363 | wchar_t *str; |
| 1364 | xref_dest dest; |
| 1365 | |
| 1366 | switch (text->type) { |
| 1367 | /* |
| 1368 | * Start a cross-reference. |
| 1369 | */ |
| 1370 | case word_HyperLink: |
| 1371 | case word_UpperXref: |
| 1372 | case word_LowerXref: |
| 1373 | |
| 1374 | if (text->type == word_HyperLink) { |
| 1375 | dest.type = URL; |
| 1376 | dest.url = utoa_dup(text->text); |
| 1377 | dest.page = NULL; |
| 1378 | } else { |
| 1379 | keyword *kwl = kw_lookup(keywords, text->text); |
| 1380 | para_data *pdata; |
| 1381 | |
| 1382 | if (kwl) { |
| 1383 | assert(kwl->para->private_data); |
| 1384 | pdata = (para_data *) kwl->para->private_data; |
| 1385 | dest.type = PAGE; |
| 1386 | dest.page = pdata->first->page; |
| 1387 | dest.url = NULL; |
| 1388 | } else { |
| 1389 | /* |
| 1390 | * Shouldn't happen, but *shrug* |
| 1391 | */ |
| 1392 | dest.type = NONE; |
| 1393 | dest.page = NULL; |
| 1394 | dest.url = NULL; |
| 1395 | } |
| 1396 | } |
| 1397 | if (dest.type != NONE) { |
| 1398 | *xr = mknew(xref); |
| 1399 | (*xr)->dest = dest; /* structure copy */ |
| 1400 | if (page->last_xref) |
| 1401 | page->last_xref->next = *xr; |
| 1402 | else |
| 1403 | page->first_xref = *xr; |
| 1404 | page->last_xref = *xr; |
| 1405 | (*xr)->next = NULL; |
| 1406 | |
| 1407 | /* |
| 1408 | * FIXME: Ideally we should have, and use, some |
| 1409 | * vertical font metric information here so that |
| 1410 | * our cross-ref rectangle can take account of |
| 1411 | * descenders and the font's cap height. This will |
| 1412 | * do for the moment, but it isn't ideal. |
| 1413 | */ |
| 1414 | (*xr)->lx = (*xr)->rx = x; |
| 1415 | (*xr)->by = y; |
| 1416 | (*xr)->ty = y + ldata->line_height; |
| 1417 | } |
| 1418 | goto nextword; |
| 1419 | |
| 1420 | /* |
| 1421 | * Finish extending a cross-reference box. |
| 1422 | */ |
| 1423 | case word_HyperEnd: |
| 1424 | case word_XrefEnd: |
| 1425 | *xr = NULL; |
| 1426 | goto nextword; |
| 1427 | |
| 1428 | case word_IndexRef: |
| 1429 | goto nextword; |
| 1430 | /* |
| 1431 | * FIXME: we should do something with this. |
| 1432 | */ |
| 1433 | } |
| 1434 | |
| 1435 | style = towordstyle(text->type); |
| 1436 | type = removeattr(text->type); |
| 1437 | |
| 1438 | findex = (style == word_Normal ? FONT_NORMAL : |
| 1439 | style == word_Emph ? FONT_EMPH : |
| 1440 | FONT_CODE); |
| 1441 | |
| 1442 | if (type == word_Normal) { |
| 1443 | str = text->text; |
| 1444 | } else if (type == word_WhiteSpace) { |
| 1445 | x += pdata->sizes[findex] * |
| 1446 | string_width(pdata->fonts[findex], L" ", NULL); |
| 1447 | if (nspaces && findex != FONT_CODE) { |
| 1448 | x += (*nspace+1) * shortfall / nspaces; |
| 1449 | x -= *nspace * shortfall / nspaces; |
| 1450 | (*nspace)++; |
| 1451 | } |
| 1452 | goto nextword; |
| 1453 | } else /* if (type == word_Quote) */ { |
| 1454 | if (text->aux == quote_Open) |
| 1455 | str = L"\x2018"; /* FIXME: configurability! */ |
| 1456 | else |
| 1457 | str = L"\x2019"; /* FIXME: configurability! */ |
| 1458 | } |
| 1459 | |
| 1460 | (void) string_width(pdata->fonts[findex], str, &errs); |
| 1461 | |
| 1462 | if (errs && text->alt) |
| 1463 | x = render_text(page, pdata, ldata, x, y, text->alt, NULL, |
| 1464 | xr, shortfall, nspaces, nspace, keywords); |
| 1465 | else |
| 1466 | x = render_string(page, pdata->fonts[findex], |
| 1467 | pdata->sizes[findex], x, y, str); |
| 1468 | |
| 1469 | if (*xr) |
| 1470 | (*xr)->rx = x; |
| 1471 | |
| 1472 | nextword: |
| 1473 | text = text->next; |
| 1474 | } |
| 1475 | |
| 1476 | return x; |
| 1477 | } |
| 1478 | |
| 1479 | /* |
| 1480 | * Returns the last x position used on the line. |
| 1481 | */ |
| 1482 | static int render_line(line_data *ldata, int left_x, int top_y, |
| 1483 | xref_dest *dest, keywordlist *keywords) |
| 1484 | { |
| 1485 | int nspace; |
| 1486 | xref *xr; |
| 1487 | int ret = 0; |
| 1488 | |
| 1489 | if (ldata->aux_text) { |
| 1490 | int x; |
| 1491 | xr = NULL; |
| 1492 | nspace = 0; |
| 1493 | x = render_text(ldata->page, ldata->pdata, ldata, |
| 1494 | left_x + ldata->aux_left_indent, |
| 1495 | top_y - ldata->ypos, |
| 1496 | ldata->aux_text, NULL, &xr, 0, 0, &nspace, keywords); |
| 1497 | if (ldata->aux_text_2) |
| 1498 | render_text(ldata->page, ldata->pdata, ldata, |
| 1499 | x, top_y - ldata->ypos, |
| 1500 | ldata->aux_text_2, NULL, &xr, 0, 0, &nspace, keywords); |
| 1501 | } |
| 1502 | nspace = 0; |
| 1503 | |
| 1504 | if (ldata->first) { |
| 1505 | /* |
| 1506 | * There might be a cross-reference carried over from a |
| 1507 | * previous line. |
| 1508 | */ |
| 1509 | if (dest->type != NONE) { |
| 1510 | xr = mknew(xref); |
| 1511 | xr->next = NULL; |
| 1512 | xr->dest = *dest; /* structure copy */ |
| 1513 | if (ldata->page->last_xref) |
| 1514 | ldata->page->last_xref->next = xr; |
| 1515 | else |
| 1516 | ldata->page->first_xref = xr; |
| 1517 | ldata->page->last_xref = xr; |
| 1518 | xr->lx = xr->rx = left_x + ldata->xpos; |
| 1519 | xr->by = top_y - ldata->ypos; |
| 1520 | xr->ty = top_y - ldata->ypos + ldata->line_height; |
| 1521 | } else |
| 1522 | xr = NULL; |
| 1523 | |
| 1524 | ret = render_text(ldata->page, ldata->pdata, ldata, |
| 1525 | left_x + ldata->xpos, |
| 1526 | top_y - ldata->ypos, ldata->first, ldata->end, &xr, |
| 1527 | ldata->hshortfall, ldata->nspaces, &nspace, |
| 1528 | keywords); |
| 1529 | |
| 1530 | if (xr) { |
| 1531 | /* |
| 1532 | * There's a cross-reference continued on to the next line. |
| 1533 | */ |
| 1534 | *dest = xr->dest; |
| 1535 | } else |
| 1536 | dest->type = NONE; |
| 1537 | } |
| 1538 | |
| 1539 | return ret; |
| 1540 | } |
| 1541 | |
| 1542 | static para_data *code_paragraph(int indent, word *words, paper_conf *conf) |
| 1543 | { |
| 1544 | para_data *pdata = mknew(para_data); |
| 1545 | |
| 1546 | /* |
| 1547 | * For code paragraphs, I'm going to hack grievously and |
| 1548 | * pretend the three normal fonts are the three code paragraph |
| 1549 | * fonts. |
| 1550 | */ |
| 1551 | pdata->fonts[FONT_NORMAL] = conf->cb; |
| 1552 | pdata->fonts[FONT_EMPH] = conf->co; |
| 1553 | pdata->fonts[FONT_CODE] = conf->cr; |
| 1554 | pdata->sizes[FONT_NORMAL] = |
| 1555 | pdata->sizes[FONT_EMPH] = |
| 1556 | pdata->sizes[FONT_CODE] = 12; |
| 1557 | |
| 1558 | pdata->first = pdata->last = NULL; |
| 1559 | pdata->outline_level = -1; |
| 1560 | pdata->rect_type = RECT_NONE; |
| 1561 | pdata->contents_entry = NULL; |
| 1562 | |
| 1563 | for (; words; words = words->next) { |
| 1564 | wchar_t *t, *e, *start; |
| 1565 | word *lhead = NULL, *ltail = NULL, *w; |
| 1566 | line_data *ldata; |
| 1567 | int prev = -1, curr; |
| 1568 | |
| 1569 | t = words->text; |
| 1570 | if (words->next && words->next->type == word_Emph) { |
| 1571 | e = words->next->text; |
| 1572 | words = words->next; |
| 1573 | } else |
| 1574 | e = NULL; |
| 1575 | |
| 1576 | start = t; |
| 1577 | |
| 1578 | while (*start) { |
| 1579 | while (*t) { |
| 1580 | if (!e || !*e) |
| 1581 | curr = 0; |
| 1582 | else if (*e == L'i') |
| 1583 | curr = 1; |
| 1584 | else if (*e == L'b') |
| 1585 | curr = 2; |
| 1586 | else |
| 1587 | curr = 0; |
| 1588 | |
| 1589 | if (prev < 0) |
| 1590 | prev = curr; |
| 1591 | |
| 1592 | if (curr != prev) |
| 1593 | break; |
| 1594 | |
| 1595 | t++; |
| 1596 | if (e && *e) |
| 1597 | e++; |
| 1598 | } |
| 1599 | |
| 1600 | /* |
| 1601 | * We've isolated a maximal subsequence of the line |
| 1602 | * which has the same emphasis. Form it into a word |
| 1603 | * structure. |
| 1604 | */ |
| 1605 | w = mknew(word); |
| 1606 | w->next = NULL; |
| 1607 | w->alt = NULL; |
| 1608 | w->type = (prev == 0 ? word_WeakCode : |
| 1609 | prev == 1 ? word_Emph : word_Normal); |
| 1610 | w->text = mknewa(wchar_t, t-start+1); |
| 1611 | memcpy(w->text, start, (t-start) * sizeof(wchar_t)); |
| 1612 | w->text[t-start] = '\0'; |
| 1613 | w->breaks = FALSE; |
| 1614 | |
| 1615 | if (ltail) |
| 1616 | ltail->next = w; |
| 1617 | else |
| 1618 | lhead = w; |
| 1619 | ltail = w; |
| 1620 | |
| 1621 | start = t; |
| 1622 | prev = -1; |
| 1623 | } |
| 1624 | |
| 1625 | ldata = mknew(line_data); |
| 1626 | |
| 1627 | ldata->pdata = pdata; |
| 1628 | ldata->first = lhead; |
| 1629 | ldata->end = NULL; |
| 1630 | ldata->line_height = conf->base_font_size * 4096; |
| 1631 | |
| 1632 | ldata->xpos = indent; |
| 1633 | |
| 1634 | if (pdata->last) { |
| 1635 | pdata->last->next = ldata; |
| 1636 | ldata->prev = pdata->last; |
| 1637 | } else { |
| 1638 | pdata->first = ldata; |
| 1639 | ldata->prev = NULL; |
| 1640 | } |
| 1641 | ldata->next = NULL; |
| 1642 | pdata->last = ldata; |
| 1643 | |
| 1644 | ldata->hshortfall = 0; |
| 1645 | ldata->nspaces = 0; |
| 1646 | ldata->aux_text = NULL; |
| 1647 | ldata->aux_text_2 = NULL; |
| 1648 | ldata->aux_left_indent = 0; |
| 1649 | /* General opprobrium for breaking in a code paragraph. */ |
| 1650 | ldata->penalty_before = ldata->penalty_after = 50000; |
| 1651 | } |
| 1652 | |
| 1653 | standard_line_spacing(pdata, conf); |
| 1654 | |
| 1655 | return pdata; |
| 1656 | } |
| 1657 | |
| 1658 | static para_data *rule_paragraph(int indent, paper_conf *conf) |
| 1659 | { |
| 1660 | para_data *pdata = mknew(para_data); |
| 1661 | line_data *ldata; |
| 1662 | |
| 1663 | ldata = mknew(line_data); |
| 1664 | |
| 1665 | ldata->pdata = pdata; |
| 1666 | ldata->first = NULL; |
| 1667 | ldata->end = NULL; |
| 1668 | ldata->line_height = conf->rule_thickness; |
| 1669 | |
| 1670 | ldata->xpos = indent; |
| 1671 | |
| 1672 | ldata->prev = NULL; |
| 1673 | ldata->next = NULL; |
| 1674 | |
| 1675 | ldata->hshortfall = 0; |
| 1676 | ldata->nspaces = 0; |
| 1677 | ldata->aux_text = NULL; |
| 1678 | ldata->aux_text_2 = NULL; |
| 1679 | ldata->aux_left_indent = 0; |
| 1680 | |
| 1681 | /* |
| 1682 | * Better to break after a rule than before it |
| 1683 | */ |
| 1684 | ldata->penalty_after += 100000; |
| 1685 | ldata->penalty_before += -100000; |
| 1686 | |
| 1687 | pdata->first = pdata->last = ldata; |
| 1688 | pdata->outline_level = -1; |
| 1689 | pdata->rect_type = RECT_RULE; |
| 1690 | pdata->contents_entry = NULL; |
| 1691 | |
| 1692 | standard_line_spacing(pdata, conf); |
| 1693 | |
| 1694 | return pdata; |
| 1695 | } |
| 1696 | |
| 1697 | /* |
| 1698 | * Plain-text-like formatting for outline titles. |
| 1699 | */ |
| 1700 | static void paper_rdaddw(rdstring *rs, word *text) { |
| 1701 | for (; text; text = text->next) switch (text->type) { |
| 1702 | case word_HyperLink: |
| 1703 | case word_HyperEnd: |
| 1704 | case word_UpperXref: |
| 1705 | case word_LowerXref: |
| 1706 | case word_XrefEnd: |
| 1707 | case word_IndexRef: |
| 1708 | break; |
| 1709 | |
| 1710 | case word_Normal: |
| 1711 | case word_Emph: |
| 1712 | case word_Code: |
| 1713 | case word_WeakCode: |
| 1714 | case word_WhiteSpace: |
| 1715 | case word_EmphSpace: |
| 1716 | case word_CodeSpace: |
| 1717 | case word_WkCodeSpace: |
| 1718 | case word_Quote: |
| 1719 | case word_EmphQuote: |
| 1720 | case word_CodeQuote: |
| 1721 | case word_WkCodeQuote: |
| 1722 | assert(text->type != word_CodeQuote && |
| 1723 | text->type != word_WkCodeQuote); |
| 1724 | if (towordstyle(text->type) == word_Emph && |
| 1725 | (attraux(text->aux) == attr_First || |
| 1726 | attraux(text->aux) == attr_Only)) |
| 1727 | rdadd(rs, L'_'); /* FIXME: configurability */ |
| 1728 | else if (towordstyle(text->type) == word_Code && |
| 1729 | (attraux(text->aux) == attr_First || |
| 1730 | attraux(text->aux) == attr_Only)) |
| 1731 | rdadd(rs, L'\''); /* FIXME: configurability */ |
| 1732 | if (removeattr(text->type) == word_Normal) { |
| 1733 | rdadds(rs, text->text); |
| 1734 | } else if (removeattr(text->type) == word_WhiteSpace) { |
| 1735 | rdadd(rs, L' '); |
| 1736 | } else if (removeattr(text->type) == word_Quote) { |
| 1737 | rdadd(rs, L'\''); /* fixme: configurability */ |
| 1738 | } |
| 1739 | if (towordstyle(text->type) == word_Emph && |
| 1740 | (attraux(text->aux) == attr_Last || |
| 1741 | attraux(text->aux) == attr_Only)) |
| 1742 | rdadd(rs, L'_'); /* FIXME: configurability */ |
| 1743 | else if (towordstyle(text->type) == word_Code && |
| 1744 | (attraux(text->aux) == attr_Last || |
| 1745 | attraux(text->aux) == attr_Only)) |
| 1746 | rdadd(rs, L'\''); /* FIXME: configurability */ |
| 1747 | break; |
| 1748 | } |
| 1749 | } |
| 1750 | |
| 1751 | static wchar_t *prepare_outline_title(word *first, wchar_t *separator, |
| 1752 | word *second) |
| 1753 | { |
| 1754 | rdstring rs = {0, 0, NULL}; |
| 1755 | |
| 1756 | if (first) |
| 1757 | paper_rdaddw(&rs, first); |
| 1758 | if (separator) |
| 1759 | rdadds(&rs, separator); |
| 1760 | if (second) |
| 1761 | paper_rdaddw(&rs, second); |
| 1762 | |
| 1763 | return rs.text; |
| 1764 | } |
| 1765 | |
| 1766 | static word *fake_word(wchar_t *text) |
| 1767 | { |
| 1768 | word *ret = mknew(word); |
| 1769 | ret->next = NULL; |
| 1770 | ret->alt = NULL; |
| 1771 | ret->type = word_Normal; |
| 1772 | ret->text = ustrdup(text); |
| 1773 | ret->breaks = FALSE; |
| 1774 | ret->aux = 0; |
| 1775 | return ret; |
| 1776 | } |
| 1777 | |
| 1778 | static word *prepare_contents_title(word *first, wchar_t *separator, |
| 1779 | word *second) |
| 1780 | { |
| 1781 | word *ret; |
| 1782 | word **wptr, *w; |
| 1783 | |
| 1784 | wptr = &ret; |
| 1785 | |
| 1786 | if (first) { |
| 1787 | w = dup_word_list(first); |
| 1788 | *wptr = w; |
| 1789 | while (w->next) |
| 1790 | w = w->next; |
| 1791 | wptr = &w->next; |
| 1792 | } |
| 1793 | |
| 1794 | if (separator) { |
| 1795 | w = fake_word(separator); |
| 1796 | *wptr = w; |
| 1797 | wptr = &w->next; |
| 1798 | } |
| 1799 | |
| 1800 | if (second) { |
| 1801 | *wptr = dup_word_list(second); |
| 1802 | } |
| 1803 | |
| 1804 | return ret; |
| 1805 | } |