1 #include <u.h> 2 #include <libc.h> 3 #include <draw.h> 4 #include <ctype.h> 5 #include <html.h> 6 #include "impl.h" 7 8 // A stack for holding integer values 9 enum { 10 Nestmax = 40 // max nesting level of lists, font styles, etc. 11 }; 12 13 struct Stack { 14 int n; // next available slot (top of stack is stack[n-1]) 15 int slots[Nestmax]; // stack entries 16 }; 17 18 // Parsing state 19 struct Pstate 20 { 21 Pstate* next; // in stack of Pstates 22 int skipping; // true when we shouldn't add items 23 int skipwhite; // true when we should strip leading space 24 int curfont; // font index for current font 25 int curfg; // current foreground color 26 Background curbg; // current background 27 int curvoff; // current baseline offset 28 uchar curul; // current underline/strike state 29 uchar curjust; // current justify state 30 int curanchor; // current (href) anchor id (if in one), or 0 31 int curstate; // current value of item state 32 int literal; // current literal state 33 int inpar; // true when in a paragraph-like construct 34 int adjsize; // current font size adjustment 35 Item* items; // dummy head of item list we're building 36 Item* lastit; // tail of item list we're building 37 Item* prelastit; // item before lastit 38 Stack fntstylestk; // style stack 39 Stack fntsizestk; // size stack 40 Stack fgstk; // text color stack 41 Stack ulstk; // underline stack 42 Stack voffstk; // vertical offset stack 43 Stack listtypestk; // list type stack 44 Stack listcntstk; // list counter stack 45 Stack juststk; // justification stack 46 Stack hangstk; // hanging stack 47 }; 48 49 struct ItemSource 50 { 51 Docinfo* doc; 52 Pstate* psstk; 53 int nforms; 54 int ntables; 55 int nanchors; 56 int nframes; 57 Form* curform; 58 Map* curmap; 59 Table* tabstk; 60 Kidinfo* kidstk; 61 }; 62 63 // Some layout parameters 64 enum { 65 FRKIDMARGIN = 6, // default margin around kid frames 66 IMGHSPACE = 0, // default hspace for images (0 matches IE, Netscape) 67 IMGVSPACE = 0, // default vspace for images 68 FLTIMGHSPACE = 2, // default hspace for float images 69 TABSP = 5, // default cellspacing for tables 70 TABPAD = 1, // default cell padding for tables 71 LISTTAB = 1, // number of tabs to indent lists 72 BQTAB = 1, // number of tabs to indent blockquotes 73 HRSZ = 2, // thickness of horizontal rules 74 SUBOFF = 4, // vertical offset for subscripts 75 SUPOFF = 6, // vertical offset for superscripts 76 NBSP = 160 // non-breaking space character 77 }; 78 79 // These tables must be sorted 80 static StringInt align_tab[] = { 81 {L"baseline", ALbaseline}, 82 {L"bottom", ALbottom}, 83 {L"center", ALcenter}, 84 {L"char", ALchar}, 85 {L"justify", ALjustify}, 86 {L"left", ALleft}, 87 {L"middle", ALmiddle}, 88 {L"right", ALright}, 89 {L"top", ALtop} 90 }; 91 #define NALIGNTAB (sizeof(align_tab)/sizeof(StringInt)) 92 93 static StringInt input_tab[] = { 94 {L"button", Fbutton}, 95 {L"checkbox", Fcheckbox}, 96 {L"file", Ffile}, 97 {L"hidden", Fhidden}, 98 {L"image", Fimage}, 99 {L"password", Fpassword}, 100 {L"radio", Fradio}, 101 {L"reset", Freset}, 102 {L"submit", Fsubmit}, 103 {L"text", Ftext} 104 }; 105 #define NINPUTTAB (sizeof(input_tab)/sizeof(StringInt)) 106 107 static StringInt clear_tab[] = { 108 {L"all", IFcleft|IFcright}, 109 {L"left", IFcleft}, 110 {L"right", IFcright} 111 }; 112 #define NCLEARTAB (sizeof(clear_tab)/sizeof(StringInt)) 113 114 static StringInt fscroll_tab[] = { 115 {L"auto", FRhscrollauto|FRvscrollauto}, 116 {L"no", FRnoscroll}, 117 {L"yes", FRhscroll|FRvscroll}, 118 }; 119 #define NFSCROLLTAB (sizeof(fscroll_tab)/sizeof(StringInt)) 120 121 static StringInt shape_tab[] = { 122 {L"circ", SHcircle}, 123 {L"circle", SHcircle}, 124 {L"poly", SHpoly}, 125 {L"polygon", SHpoly}, 126 {L"rect", SHrect}, 127 {L"rectangle", SHrect} 128 }; 129 #define NSHAPETAB (sizeof(shape_tab)/sizeof(StringInt)) 130 131 static StringInt method_tab[] = { 132 {L"get", HGet}, 133 {L"post", HPost} 134 }; 135 #define NMETHODTAB (sizeof(method_tab)/sizeof(StringInt)) 136 137 static Rune* roman[15]= { 138 L"I", L"II", L"III", L"IV", L"V", L"VI", L"VII", L"VIII", L"IX", L"X", 139 L"XI", L"XII", L"XIII", L"XIV", L"XV" 140 }; 141 #define NROMAN 15 142 143 // List number types 144 enum { 145 LTdisc, LTsquare, LTcircle, LT1, LTa, LTA, LTi, LTI 146 }; 147 148 enum { 149 SPBefore = 2, 150 SPAfter = 4, 151 BL = 1, 152 BLBA = (BL|SPBefore|SPAfter) 153 }; 154 155 // blockbrk[tag] is break info for a block level element, or one 156 // of a few others that get the same treatment re ending open paragraphs 157 // and requiring a line break / vertical space before them. 158 // If we want a line of space before the given element, SPBefore is OR'd in. 159 // If we want a line of space after the given element, SPAfter is OR'd in. 160 161 static uchar blockbrk[Numtags]= { 162 [Taddress] BLBA, [Tblockquote] BLBA, [Tcenter] BL, 163 [Tdir] BLBA, [Tdiv] BL, [Tdd] BL, [Tdl] BLBA, 164 [Tdt] BL, [Tform] BLBA, 165 // headings and tables get breaks added manually 166 [Th1] BL, [Th2] BL, [Th3] BL, 167 [Th4] BL, [Th5] BL, [Th6] BL, 168 [Thr] BL, [Tisindex] BLBA, [Tli] BL, [Tmenu] BLBA, 169 [Tol] BLBA, [Tp] BLBA, [Tpre] BLBA, 170 [Tul] BLBA 171 }; 172 173 enum { 174 AGEN = 1 175 }; 176 177 // attrinfo is information about attributes. 178 // The AGEN value means that the attribute is generic (applies to almost all elements) 179 static uchar attrinfo[Numattrs]= { 180 [Aid] AGEN, [Aclass] AGEN, [Astyle] AGEN, [Atitle] AGEN, 181 [Aonblur] AGEN, [Aonchange] AGEN, [Aonclick] AGEN, 182 [Aondblclick] AGEN, [Aonfocus] AGEN, [Aonkeypress] AGEN, 183 [Aonkeyup] AGEN, [Aonload] AGEN, [Aonmousedown] AGEN, 184 [Aonmousemove] AGEN, [Aonmouseout] AGEN, [Aonmouseover] AGEN, 185 [Aonmouseup] AGEN, [Aonreset] AGEN, [Aonselect] AGEN, 186 [Aonsubmit] AGEN, [Aonunload] AGEN 187 }; 188 189 static uchar scriptev[Numattrs]= { 190 [Aonblur] SEonblur, [Aonchange] SEonchange, [Aonclick] SEonclick, 191 [Aondblclick] SEondblclick, [Aonfocus] SEonfocus, [Aonkeypress] SEonkeypress, 192 [Aonkeyup] SEonkeyup, [Aonload] SEonload, [Aonmousedown] SEonmousedown, 193 [Aonmousemove] SEonmousemove, [Aonmouseout] SEonmouseout, [Aonmouseover] SEonmouseover, 194 [Aonmouseup] SEonmouseup, [Aonreset] SEonreset, [Aonselect] SEonselect, 195 [Aonsubmit] SEonsubmit, [Aonunload] SEonunload 196 }; 197 198 // Color lookup table 199 static StringInt color_tab[] = { 200 {L"aqua", 0x00FFFF}, 201 {L"black", 0x000000}, 202 {L"blue", 0x0000CC}, 203 {L"fuchsia", 0xFF00FF}, 204 {L"gray", 0x808080}, 205 {L"green", 0x008000}, 206 {L"lime", 0x00FF00}, 207 {L"maroon", 0x800000}, 208 {L"navy", 0x000080,}, 209 {L"olive", 0x808000}, 210 {L"purple", 0x800080}, 211 {L"red", 0xFF0000}, 212 {L"silver", 0xC0C0C0}, 213 {L"teal", 0x008080}, 214 {L"white", 0xFFFFFF}, 215 {L"yellow", 0xFFFF00} 216 }; 217 #define NCOLORS (sizeof(color_tab)/sizeof(StringInt)) 218 219 static StringInt *targetmap; 220 static int targetmapsize; 221 static int ntargets; 222 223 static int buildinited = 0; 224 225 #define SMALLBUFSIZE 240 226 #define BIGBUFSIZE 2000 227 228 int dbgbuild = 0; 229 int warn = 0; 230 231 static Align aalign(Token* tok); 232 static int acolorval(Token* tok, int attid, int dflt); 233 static void addbrk(Pstate* ps, int sp, int clr); 234 static void additem(Pstate* ps, Item* it, Token* tok); 235 static void addlinebrk(Pstate* ps, int clr); 236 static void addnbsp(Pstate* ps); 237 static void addtext(Pstate* ps, Rune* s); 238 static Dimen adimen(Token* tok, int attid); 239 static int aflagval(Token* tok, int attid); 240 static int aintval(Token* tok, int attid, int dflt); 241 static Rune* astrval(Token* tok, int attid, Rune* dflt); 242 static int atabval(Token* tok, int attid, StringInt* tab, int ntab, int dflt); 243 static int atargval(Token* tok, int dflt); 244 static int auintval(Token* tok, int attid, int dflt); 245 static Rune* aurlval(Token* tok, int attid, Rune* dflt, Rune* base); 246 static Rune* aval(Token* tok, int attid); 247 static void buildinit(void); 248 static Pstate* cell_pstate(Pstate* oldps, int ishead); 249 static void changehang(Pstate* ps, int delta); 250 static void changeindent(Pstate* ps, int delta); 251 static int color(Rune* s, int dflt); 252 static void copystack(Stack* tostk, Stack* fromstk); 253 static int dimprint(char* buf, int nbuf, Dimen d); 254 static Pstate* finishcell(Table* curtab, Pstate* psstk); 255 static void finish_table(Table* t); 256 static void freeanchor(Anchor* a); 257 static void freedestanchor(DestAnchor* da); 258 static void freeform(Form* f); 259 static void freeformfield(Formfield* ff); 260 static void freeitem(Item* it); 261 static void freepstate(Pstate* p); 262 static void freepstatestack(Pstate* pshead); 263 static void freescriptevents(SEvent* ehead); 264 static void freetable(Table* t); 265 static Map* getmap(Docinfo* di, Rune* name); 266 static Rune* getpcdata(Token* toks, int tokslen, int* ptoki); 267 static Pstate* lastps(Pstate* psl); 268 static Rune* listmark(uchar ty, int n); 269 static int listtyval(Token* tok, int dflt); 270 static Align makealign(int halign, int valign); 271 static Background makebackground(Rune* imgurl, int color); 272 static Dimen makedimen(int kind, int spec); 273 static Anchor* newanchor(int index, Rune* name, Rune* href, int target, Anchor* link); 274 static Area* newarea(int shape, Rune* href, int target, Area* link); 275 static DestAnchor* newdestanchor(int index, Rune* name, Item* item, DestAnchor* link); 276 static Docinfo* newdocinfo(void); 277 static Genattr* newgenattr(Rune* id, Rune* class, Rune* style, Rune* title, Attr* events); 278 static Form* newform(int formid, Rune* name, Rune* action, 279 int target, int method, Form* link); 280 static Formfield* newformfield(int ftype, int fieldid, Form* form, Rune* name, 281 Rune* value, int size, int maxlength, Formfield* link); 282 static Item* newifloat(Item* it, int side); 283 static Item* newiformfield(Formfield* ff); 284 static Item* newiimage(Rune* src, Rune* altrep, int align, int width, int height, 285 int hspace, int vspace, int border, int ismap, Map* map); 286 static Item* newirule(int align, int size, int noshade, Dimen wspec); 287 static Item* newispacer(int spkind); 288 static Item* newitable(Table* t); 289 static ItemSource* newitemsource(Docinfo* di); 290 static Item* newitext(Rune* s, int fnt, int fg, int voff, int ul); 291 static Kidinfo* newkidinfo(int isframeset, Kidinfo* link); 292 static Option* newoption(int selected, Rune* value, Rune* display, Option* link); 293 static Pstate* newpstate(Pstate* link); 294 static SEvent* newscriptevent(int type, Rune* script, SEvent* link); 295 static Table* newtable(int tableid, Align align, Dimen width, int border, 296 int cellspacing, int cellpadding, Background bg, Token* tok, Table* link); 297 static Tablecell* newtablecell(int cellid, int rowspan, int colspan, Align align, Dimen wspec, 298 int hspec, Background bg, int flags, Tablecell* link); 299 static Tablerow* newtablerow(Align align, Background bg, int flags, Tablerow* link); 300 static Dimen parsedim(Rune* s, int ns); 301 static void pop(Stack* stk); 302 static void popfontsize(Pstate* ps); 303 static void popfontstyle(Pstate* ps); 304 static void popjust(Pstate* ps); 305 static int popretnewtop(Stack* stk, int dflt); 306 static int push(Stack* stk, int val); 307 static void pushfontsize(Pstate* ps, int sz); 308 static void pushfontstyle(Pstate* ps, int sty); 309 static void pushjust(Pstate* ps, int j); 310 static Item* textit(Pstate* ps, Rune* s); 311 static Rune* removeallwhite(Rune* s); 312 static void resetdocinfo(Docinfo* d); 313 static void setcurfont(Pstate* ps); 314 static void setcurjust(Pstate* ps); 315 static void setdimarray(Token* tok, int attid, Dimen** pans, int* panslen); 316 static Rune* stringalign(int a); 317 static void targetmapinit(void); 318 static int toint(Rune* s); 319 static int top(Stack* stk, int dflt); 320 static void trim_cell(Tablecell* c); 321 static int validalign(Align a); 322 static int validdimen(Dimen d); 323 static int validformfield(Formfield* f); 324 static int validhalign(int a); 325 static int validptr(void* p); 326 static int validStr(Rune* s); 327 static int validtable(Table* t); 328 static int validtablerow(Tablerow* r); 329 static int validtablecol(Tablecol* c); 330 static int validtablecell(Tablecell* c); 331 static int validvalign(int a); 332 static int Iconv(Fmt *f); 333 334 static void 335 buildinit(void) 336 { 337 fmtinstall('I', Iconv); 338 targetmapinit(); 339 buildinited = 1; 340 } 341 342 static ItemSource* 343 newitemsource(Docinfo* di) 344 { 345 ItemSource* is; 346 Pstate* ps; 347 348 ps = newpstate(nil); 349 if(di->mediatype != TextHtml) { 350 ps->curstate &= ~IFwrap; 351 ps->literal = 1; 352 pushfontstyle(ps, FntT); 353 } 354 is = (ItemSource*)emalloc(sizeof(ItemSource)); 355 is->doc = di; 356 is->psstk = ps; 357 is->nforms = 0; 358 is->ntables = 0; 359 is->nanchors = 0; 360 is->nframes = 0; 361 is->curform = nil; 362 is->curmap = nil; 363 is->tabstk = nil; 364 is->kidstk = nil; 365 return is; 366 } 367 368 static Item *getitems(ItemSource* is, uchar* data, int datalen); 369 370 // Parse an html document and create a list of layout items. 371 // Allocate and return document info in *pdi. 372 // When caller is done with the items, it should call 373 // freeitems on the returned result, and then 374 // freedocinfo(*pdi). 375 Item* 376 parsehtml(uchar* data, int datalen, Rune* pagesrc, int mtype, int chset, Docinfo** pdi) 377 { 378 Item *it; 379 Docinfo* di; 380 ItemSource* is; 381 382 di = newdocinfo(); 383 di->src = _Strdup(pagesrc); 384 di->base = _Strdup(pagesrc); 385 di->mediatype = mtype; 386 di->chset = chset; 387 *pdi = di; 388 is = newitemsource(di); 389 it = getitems(is, data, datalen); 390 freepstatestack(is->psstk); 391 free(is); 392 return it; 393 } 394 395 // Get a group of tokens for lexer, parse them, and create 396 // a list of layout items. 397 // When caller is done with the items, it should call 398 // freeitems on the returned result. 399 static Item* 400 getitems(ItemSource* is, uchar* data, int datalen) 401 { 402 int i; 403 int j; 404 int nt; 405 int pt; 406 int doscripts; 407 int tokslen; 408 int toki; 409 int h; 410 int sz; 411 int method; 412 int n; 413 int nblank; 414 int norsz; 415 int bramt; 416 int sty; 417 int nosh; 418 int oldcuranchor; 419 int dfltbd; 420 int v; 421 int hang; 422 int isempty; 423 int tag; 424 int brksp; 425 int target; 426 uchar brk; 427 uchar flags; 428 uchar align; 429 uchar al; 430 uchar ty; 431 uchar ty2; 432 Pstate* ps; 433 Pstate* nextps; 434 Pstate* outerps; 435 Table* curtab; 436 Token* tok; 437 Token* toks; 438 Docinfo* di; 439 Item* ans; 440 Item* img; 441 Item* ffit; 442 Item* tabitem; 443 Rune* s; 444 Rune* t; 445 Rune* name; 446 Rune* enctype; 447 Rune* usemap; 448 Rune* prompt; 449 Rune* equiv; 450 Rune* val; 451 Rune* nsz; 452 Rune* script; 453 Map* map; 454 Form* frm; 455 Iimage* ii; 456 Kidinfo* kd; 457 Kidinfo* ks; 458 Kidinfo* pks; 459 Dimen wd; 460 Option* option; 461 Table* tab; 462 Tablecell* c; 463 Tablerow* tr; 464 Formfield* field; 465 Formfield* ff; 466 Rune* href; 467 Rune* src; 468 Rune* scriptsrc; 469 Rune* bgurl; 470 Rune* action; 471 Background bg; 472 473 if(!buildinited) 474 buildinit(); 475 doscripts = 0; // for now 476 ps = is->psstk; 477 curtab = is->tabstk; 478 di = is->doc; 479 toks = _gettoks(data, datalen, di->chset, di->mediatype, &tokslen); 480 toki = 0; 481 for(; toki < tokslen; toki++) { 482 tok = &toks[toki]; 483 if(dbgbuild > 1) 484 fprint(2, "build: curstate %ux, token %T\n", ps->curstate, tok); 485 tag = tok->tag; 486 brk = 0; 487 brksp = 0; 488 if(tag < Numtags) { 489 brk = blockbrk[tag]; 490 if(brk&SPBefore) 491 brksp = 1; 492 } 493 else if(tag < Numtags + RBRA) { 494 brk = blockbrk[tag - RBRA]; 495 if(brk&SPAfter) 496 brksp = 1; 497 } 498 if(brk) { 499 addbrk(ps, brksp, 0); 500 if(ps->inpar) { 501 popjust(ps); 502 ps->inpar = 0; 503 } 504 } 505 // check common case first (Data), then switch statement on tag 506 if(tag == Data) { 507 // Lexing didn't pay attention to SGML record boundary rules: 508 // \n after start tag or before end tag to be discarded. 509 // (Lex has already discarded all \r's). 510 // Some pages assume this doesn't happen in <PRE> text, 511 // so we won't do it if literal is true. 512 // BUG: won't discard \n before a start tag that begins 513 // the next bufferful of tokens. 514 s = tok->text; 515 n = _Strlen(s); 516 if(!ps->literal) { 517 i = 0; 518 j = n; 519 if(toki > 0) { 520 pt = toks[toki - 1].tag; 521 // IE and Netscape both ignore this rule (contrary to spec) 522 // if previous tag was img 523 if(pt < Numtags && pt != Timg && j > 0 && s[0] == '\n') 524 i++; 525 } 526 if(toki < tokslen - 1) { 527 nt = toks[toki + 1].tag; 528 if(nt >= RBRA && nt < Numtags + RBRA && j > i && s[j - 1] == '\n') 529 j--; 530 } 531 if(i > 0 || j < n) { 532 t = s; 533 s = _Strsubstr(s, i, j); 534 free(t); 535 n = j-i; 536 } 537 } 538 if(ps->skipwhite) { 539 _trimwhite(s, n, &t, &nt); 540 if(t == nil) { 541 free(s); 542 s = nil; 543 } 544 else if(t != s) { 545 t = _Strndup(t, nt); 546 free(s); 547 s = t; 548 } 549 if(s != nil) 550 ps->skipwhite = 0; 551 } 552 tok->text = nil; // token doesn't own string anymore 553 if(s != nil) 554 addtext(ps, s); 555 } 556 else 557 switch(tag) { 558 // Some abbrevs used in following DTD comments 559 // %text = #PCDATA 560 // | TT | I | B | U | STRIKE | BIG | SMALL | SUB | SUP 561 // | EM | STRONG | DFN | CODE | SAMP | KBD | VAR | CITE 562 // | A | IMG | APPLET | FONT | BASEFONT | BR | SCRIPT | MAP 563 // | INPUT | SELECT | TEXTAREA 564 // %block = P | UL | OL | DIR | MENU | DL | PRE | DL | DIV | CENTER 565 // | BLOCKQUOTE | FORM | ISINDEX | HR | TABLE 566 // %flow = (%text | %block)* 567 // %body.content = (%heading | %text | %block | ADDRESS)* 568 569 // <!ELEMENT A - - (%text) -(A)> 570 // Anchors are not supposed to be nested, but you sometimes see 571 // href anchors inside destination anchors. 572 case Ta: 573 if(ps->curanchor != 0) { 574 if(warn) 575 fprint(2, "warning: nested <A> or missing </A>\n"); 576 ps->curanchor = 0; 577 } 578 name = aval(tok, Aname); 579 href = aurlval(tok, Ahref, nil, di->base); 580 // ignore rel, rev, and title attrs 581 if(href != nil) { 582 target = atargval(tok, di->target); 583 di->anchors = newanchor(++is->nanchors, name, href, target, di->anchors); 584 if(name != nil) 585 name = _Strdup(name); // for DestAnchor construction, below 586 ps->curanchor = is->nanchors; 587 ps->curfg = push(&ps->fgstk, di->link); 588 ps->curul = push(&ps->ulstk, ULunder); 589 } 590 if(name != nil) { 591 // add a null item to be destination 592 additem(ps, newispacer(ISPnull), tok); 593 di->dests = newdestanchor(++is->nanchors, name, ps->lastit, di->dests); 594 } 595 break; 596 597 case Ta+RBRA : 598 if(ps->curanchor != 0) { 599 ps->curfg = popretnewtop(&ps->fgstk, di->text); 600 ps->curul = popretnewtop(&ps->ulstk, ULnone); 601 ps->curanchor = 0; 602 } 603 break; 604 605 // <!ELEMENT APPLET - - (PARAM | %text)* > 606 // We can't do applets, so ignore PARAMS, and let 607 // the %text contents appear for the alternative rep 608 case Tapplet: 609 case Tapplet+RBRA: 610 if(warn && tag == Tapplet) 611 fprint(2, "warning: <APPLET> ignored\n"); 612 break; 613 614 // <!ELEMENT AREA - O EMPTY> 615 case Tarea: 616 map = di->maps; 617 if(map == nil) { 618 if(warn) 619 fprint(2, "warning: <AREA> not inside <MAP>\n"); 620 continue; 621 } 622 map->areas = newarea(atabval(tok, Ashape, shape_tab, NSHAPETAB, SHrect), 623 aurlval(tok, Ahref, nil, di->base), 624 atargval(tok, di->target), 625 map->areas); 626 setdimarray(tok, Acoords, &map->areas->coords, &map->areas->ncoords); 627 break; 628 629 // <!ELEMENT (B|STRONG) - - (%text)*> 630 case Tb: 631 case Tstrong: 632 pushfontstyle(ps, FntB); 633 break; 634 635 case Tb+RBRA: 636 case Tcite+RBRA: 637 case Tcode+RBRA: 638 case Tdfn+RBRA: 639 case Tem+RBRA: 640 case Tkbd+RBRA: 641 case Ti+RBRA: 642 case Tsamp+RBRA: 643 case Tstrong+RBRA: 644 case Ttt+RBRA: 645 case Tvar+RBRA : 646 case Taddress+RBRA: 647 popfontstyle(ps); 648 break; 649 650 // <!ELEMENT BASE - O EMPTY> 651 case Tbase: 652 t = di->base; 653 di->base = aurlval(tok, Ahref, di->base, di->base); 654 if(t != nil) 655 free(t); 656 di->target = atargval(tok, di->target); 657 break; 658 659 // <!ELEMENT BASEFONT - O EMPTY> 660 case Tbasefont: 661 ps->adjsize = aintval(tok, Asize, 3) - 3; 662 break; 663 664 // <!ELEMENT (BIG|SMALL) - - (%text)*> 665 case Tbig: 666 case Tsmall: 667 sz = ps->adjsize; 668 if(tag == Tbig) 669 sz += Large; 670 else 671 sz += Small; 672 pushfontsize(ps, sz); 673 break; 674 675 case Tbig+RBRA: 676 case Tsmall+RBRA: 677 popfontsize(ps); 678 break; 679 680 // <!ELEMENT BLOCKQUOTE - - %body.content> 681 case Tblockquote: 682 changeindent(ps, BQTAB); 683 break; 684 685 case Tblockquote+RBRA: 686 changeindent(ps, -BQTAB); 687 break; 688 689 // <!ELEMENT BODY O O %body.content> 690 case Tbody: 691 ps->skipping = 0; 692 bg = makebackground(nil, acolorval(tok, Abgcolor, di->background.color)); 693 bgurl = aurlval(tok, Abackground, nil, di->base); 694 if(bgurl != nil) { 695 if(di->backgrounditem != nil) 696 freeitem((Item*)di->backgrounditem); 697 // really should remove old item from di->images list, 698 // but there should only be one BODY element ... 699 di->backgrounditem = (Iimage*)newiimage(bgurl, nil, ALnone, 0, 0, 0, 0, 0, 0, nil); 700 di->backgrounditem->nextimage = di->images; 701 di->images = di->backgrounditem; 702 } 703 ps->curbg = bg; 704 di->background = bg; 705 di->text = acolorval(tok, Atext, di->text); 706 di->link = acolorval(tok, Alink, di->link); 707 di->vlink = acolorval(tok, Avlink, di->vlink); 708 di->alink = acolorval(tok, Aalink, di->alink); 709 if(di->text != ps->curfg) { 710 ps->curfg = di->text; 711 ps->fgstk.n = 0; 712 } 713 break; 714 715 case Tbody+RBRA: 716 // HTML spec says ignore things after </body>, 717 // but IE and Netscape don't 718 // ps.skipping = 1; 719 break; 720 721 // <!ELEMENT BR - O EMPTY> 722 case Tbr: 723 addlinebrk(ps, atabval(tok, Aclear, clear_tab, NCLEARTAB, 0)); 724 break; 725 726 // <!ELEMENT CAPTION - - (%text;)*> 727 case Tcaption: 728 if(curtab == nil) { 729 if(warn) 730 fprint(2, "warning: <CAPTION> outside <TABLE>\n"); 731 continue; 732 } 733 if(curtab->caption != nil) { 734 if(warn) 735 fprint(2, "warning: more than one <CAPTION> in <TABLE>\n"); 736 continue; 737 } 738 ps = newpstate(ps); 739 curtab->caption_place = atabval(tok, Aalign, align_tab, NALIGNTAB, ALtop); 740 break; 741 742 case Tcaption+RBRA: 743 nextps = ps->next; 744 if(curtab == nil || nextps == nil) { 745 if(warn) 746 fprint(2, "warning: unexpected </CAPTION>\n"); 747 continue; 748 } 749 curtab->caption = ps->items->next; 750 free(ps); 751 ps = nextps; 752 break; 753 754 case Tcenter: 755 case Tdiv: 756 if(tag == Tcenter) 757 al = ALcenter; 758 else 759 al = atabval(tok, Aalign, align_tab, NALIGNTAB, ps->curjust); 760 pushjust(ps, al); 761 break; 762 763 case Tcenter+RBRA: 764 case Tdiv+RBRA: 765 popjust(ps); 766 break; 767 768 // <!ELEMENT DD - O %flow > 769 case Tdd: 770 if(ps->hangstk.n == 0) { 771 if(warn) 772 fprint(2, "warning: <DD> not inside <DL\n"); 773 continue; 774 } 775 h = top(&ps->hangstk, 0); 776 if(h != 0) 777 changehang(ps, -10*LISTTAB); 778 else 779 addbrk(ps, 0, 0); 780 push(&ps->hangstk, 0); 781 break; 782 783 //<!ELEMENT (DIR|MENU) - - (LI)+ -(%block) > 784 //<!ELEMENT (OL|UL) - - (LI)+> 785 case Tdir: 786 case Tmenu: 787 case Tol: 788 case Tul: 789 changeindent(ps, LISTTAB); 790 push(&ps->listtypestk, listtyval(tok, (tag==Tol)? LT1 : LTdisc)); 791 push(&ps->listcntstk, aintval(tok, Astart, 1)); 792 break; 793 794 case Tdir+RBRA: 795 case Tmenu+RBRA: 796 case Tol+RBRA: 797 case Tul+RBRA: 798 if(ps->listtypestk.n == 0) { 799 if(warn) 800 fprint(2, "warning: %T ended no list\n", tok); 801 continue; 802 } 803 addbrk(ps, 0, 0); 804 pop(&ps->listtypestk); 805 pop(&ps->listcntstk); 806 changeindent(ps, -LISTTAB); 807 break; 808 809 // <!ELEMENT DL - - (DT|DD)+ > 810 case Tdl: 811 changeindent(ps, LISTTAB); 812 push(&ps->hangstk, 0); 813 break; 814 815 case Tdl+RBRA: 816 if(ps->hangstk.n == 0) { 817 if(warn) 818 fprint(2, "warning: unexpected </DL>\n"); 819 continue; 820 } 821 changeindent(ps, -LISTTAB); 822 if(top(&ps->hangstk, 0) != 0) 823 changehang(ps, -10*LISTTAB); 824 pop(&ps->hangstk); 825 break; 826 827 // <!ELEMENT DT - O (%text)* > 828 case Tdt: 829 if(ps->hangstk.n == 0) { 830 if(warn) 831 fprint(2, "warning: <DT> not inside <DL>\n"); 832 continue; 833 } 834 h = top(&ps->hangstk, 0); 835 pop(&ps->hangstk); 836 if(h != 0) 837 changehang(ps, -10*LISTTAB); 838 changehang(ps, 10*LISTTAB); 839 push(&ps->hangstk, 1); 840 break; 841 842 // <!ELEMENT FONT - - (%text)*> 843 case Tfont: 844 sz = top(&ps->fntsizestk, Normal); 845 if(_tokaval(tok, Asize, &nsz, 0)) { 846 if(_prefix(L"+", nsz)) 847 sz = Normal + _Strtol(nsz+1, nil, 10) + ps->adjsize; 848 else if(_prefix(L"-", nsz)) 849 sz = Normal - _Strtol(nsz+1, nil, 10) + ps->adjsize; 850 else if(nsz != nil) 851 sz = Normal + (_Strtol(nsz, nil, 10) - 3); 852 } 853 ps->curfg = push(&ps->fgstk, acolorval(tok, Acolor, ps->curfg)); 854 pushfontsize(ps, sz); 855 break; 856 857 case Tfont+RBRA: 858 if(ps->fgstk.n == 0) { 859 if(warn) 860 fprint(2, "warning: unexpected </FONT>\n"); 861 continue; 862 } 863 ps->curfg = popretnewtop(&ps->fgstk, di->text); 864 popfontsize(ps); 865 break; 866 867 // <!ELEMENT FORM - - %body.content -(FORM) > 868 case Tform: 869 if(is->curform != nil) { 870 if(warn) 871 fprint(2, "warning: <FORM> nested inside another\n"); 872 continue; 873 } 874 action = aurlval(tok, Aaction, di->base, di->base); 875 s = aval(tok, Aid); 876 name = astrval(tok, Aname, s); 877 if(s) 878 free(s); 879 target = atargval(tok, di->target); 880 method = atabval(tok, Amethod, method_tab, NMETHODTAB, HGet); 881 if(warn && _tokaval(tok, Aenctype, &enctype, 0) && 882 _Strcmp(enctype, L"application/x-www-form-urlencoded")) 883 fprint(2, "form enctype %S not handled\n", enctype); 884 frm = newform(++is->nforms, name, action, target, method, di->forms); 885 di->forms = frm; 886 is->curform = frm; 887 break; 888 889 case Tform+RBRA: 890 if(is->curform == nil) { 891 if(warn) 892 fprint(2, "warning: unexpected </FORM>\n"); 893 continue; 894 } 895 // put fields back in input order 896 is->curform->fields = (Formfield*)_revlist((List*)is->curform->fields); 897 is->curform = nil; 898 break; 899 900 // <!ELEMENT FRAME - O EMPTY> 901 case Tframe: 902 ks = is->kidstk; 903 if(ks == nil) { 904 if(warn) 905 fprint(2, "warning: <FRAME> not in <FRAMESET>\n"); 906 continue; 907 } 908 ks->kidinfos = kd = newkidinfo(0, ks->kidinfos); 909 kd->src = aurlval(tok, Asrc, nil, di->base); 910 kd->name = aval(tok, Aname); 911 if(kd->name == nil) { 912 s = _ltoStr(++is->nframes); 913 kd->name = _Strdup2(L"_fr", s); 914 free(s); 915 } 916 kd->marginw = auintval(tok, Amarginwidth, 0); 917 kd->marginh = auintval(tok, Amarginheight, 0); 918 kd->framebd = auintval(tok, Aframeborder, 1); 919 kd->flags = atabval(tok, Ascrolling, fscroll_tab, NFSCROLLTAB, kd->flags); 920 norsz = aflagval(tok, Anoresize); 921 if(norsz) 922 kd->flags |= FRnoresize; 923 break; 924 925 // <!ELEMENT FRAMESET - - (FRAME|FRAMESET)+> 926 case Tframeset: 927 ks = newkidinfo(1, nil); 928 pks = is->kidstk; 929 if(pks == nil) 930 di->kidinfo = ks; 931 else { 932 ks->next = pks->kidinfos; 933 pks->kidinfos = ks; 934 } 935 ks->nextframeset = pks; 936 is->kidstk = ks; 937 setdimarray(tok, Arows, &ks->rows, &ks->nrows); 938 if(ks->nrows == 0) { 939 ks->rows = (Dimen*)emalloc(sizeof(Dimen)); 940 ks->nrows = 1; 941 ks->rows[0] = makedimen(Dpercent, 100); 942 } 943 setdimarray(tok, Acols, &ks->cols, &ks->ncols); 944 if(ks->ncols == 0) { 945 ks->cols = (Dimen*)emalloc(sizeof(Dimen)); 946 ks->ncols = 1; 947 ks->cols[0] = makedimen(Dpercent, 100); 948 } 949 break; 950 951 case Tframeset+RBRA: 952 if(is->kidstk == nil) { 953 if(warn) 954 fprint(2, "warning: unexpected </FRAMESET>\n"); 955 continue; 956 } 957 ks = is->kidstk; 958 // put kids back in original order 959 // and add blank frames to fill out cells 960 n = ks->nrows*ks->ncols; 961 nblank = n - _listlen((List*)ks->kidinfos); 962 while(nblank-- > 0) 963 ks->kidinfos = newkidinfo(0, ks->kidinfos); 964 ks->kidinfos = (Kidinfo*)_revlist((List*)ks->kidinfos); 965 is->kidstk = is->kidstk->nextframeset; 966 if(is->kidstk == nil) { 967 // end input 968 ans = nil; 969 goto return_ans; 970 } 971 break; 972 973 // <!ELEMENT H1 - - (%text;)*>, etc. 974 case Th1: 975 case Th2: 976 case Th3: 977 case Th4: 978 case Th5: 979 case Th6: 980 bramt = 1; 981 if(ps->items == ps->lastit) 982 bramt = 0; 983 addbrk(ps, bramt, IFcleft|IFcright); 984 sz = Verylarge - (tag - Th1); 985 if(sz < Tiny) 986 sz = Tiny; 987 pushfontsize(ps, sz); 988 sty = top(&ps->fntstylestk, FntR); 989 if(tag == Th1) 990 sty = FntB; 991 pushfontstyle(ps, sty); 992 pushjust(ps, atabval(tok, Aalign, align_tab, NALIGNTAB, ps->curjust)); 993 ps->skipwhite = 1; 994 break; 995 996 case Th1+RBRA: 997 case Th2+RBRA: 998 case Th3+RBRA: 999 case Th4+RBRA: 1000 case Th5+RBRA: 1001 case Th6+RBRA: 1002 addbrk(ps, 1, IFcleft|IFcright); 1003 popfontsize(ps); 1004 popfontstyle(ps); 1005 popjust(ps); 1006 break; 1007 1008 case Thead: 1009 // HTML spec says ignore regular markup in head, 1010 // but Netscape and IE don't 1011 // ps.skipping = 1; 1012 break; 1013 1014 case Thead+RBRA: 1015 ps->skipping = 0; 1016 break; 1017 1018 // <!ELEMENT HR - O EMPTY> 1019 case Thr: 1020 al = atabval(tok, Aalign, align_tab, NALIGNTAB, ALcenter); 1021 sz = auintval(tok, Asize, HRSZ); 1022 wd = adimen(tok, Awidth); 1023 if(dimenkind(wd) == Dnone) 1024 wd = makedimen(Dpercent, 100); 1025 nosh = aflagval(tok, Anoshade); 1026 additem(ps, newirule(al, sz, nosh, wd), tok); 1027 addbrk(ps, 0, 0); 1028 break; 1029 1030 case Ti: 1031 case Tcite: 1032 case Tdfn: 1033 case Tem: 1034 case Tvar: 1035 case Taddress: 1036 pushfontstyle(ps, FntI); 1037 break; 1038 1039 // <!ELEMENT IMG - O EMPTY> 1040 case Timg: 1041 map = nil; 1042 oldcuranchor = ps->curanchor; 1043 if(_tokaval(tok, Ausemap, &usemap, 0)) { 1044 if(!_prefix(L"#", usemap)) { 1045 if(warn) 1046 fprint(2, "warning: can't handle non-local map %S\n", usemap); 1047 } 1048 else { 1049 map = getmap(di, usemap+1); 1050 if(ps->curanchor == 0) { 1051 di->anchors = newanchor(++is->nanchors, nil, nil, di->target, di->anchors); 1052 ps->curanchor = is->nanchors; 1053 } 1054 } 1055 } 1056 align = atabval(tok, Aalign, align_tab, NALIGNTAB, ALbottom); 1057 dfltbd = 0; 1058 if(ps->curanchor != 0) 1059 dfltbd = 2; 1060 src = aurlval(tok, Asrc, nil, di->base); 1061 if(src == nil) { 1062 if(warn) 1063 fprint(2, "warning: <img> has no src attribute\n"); 1064 ps->curanchor = oldcuranchor; 1065 continue; 1066 } 1067 img = newiimage(src, 1068 aval(tok, Aalt), 1069 align, 1070 auintval(tok, Awidth, 0), 1071 auintval(tok, Aheight, 0), 1072 auintval(tok, Ahspace, IMGHSPACE), 1073 auintval(tok, Avspace, IMGVSPACE), 1074 auintval(tok, Aborder, dfltbd), 1075 aflagval(tok, Aismap), 1076 map); 1077 if(align == ALleft || align == ALright) { 1078 additem(ps, newifloat(img, align), tok); 1079 // if no hspace specified, use FLTIMGHSPACE 1080 if(!_tokaval(tok, Ahspace, &val, 0)) 1081 ((Iimage*)img)->hspace = FLTIMGHSPACE; 1082 } 1083 else { 1084 ps->skipwhite = 0; 1085 additem(ps, img, tok); 1086 } 1087 if(!ps->skipping) { 1088 ((Iimage*)img)->nextimage = di->images; 1089 di->images = (Iimage*)img; 1090 } 1091 ps->curanchor = oldcuranchor; 1092 break; 1093 1094 // <!ELEMENT INPUT - O EMPTY> 1095 case Tinput: 1096 ps->skipwhite = 0; 1097 if(is->curform == nil) { 1098 if(warn) 1099 fprint(2, "<INPUT> not inside <FORM>\n"); 1100 continue; 1101 } 1102 is->curform->fields = field = newformfield( 1103 atabval(tok, Atype, input_tab, NINPUTTAB, Ftext), 1104 ++is->curform->nfields, 1105 is->curform, 1106 aval(tok, Aname), 1107 aval(tok, Avalue), 1108 auintval(tok, Asize, 0), 1109 auintval(tok, Amaxlength, 1000), 1110 is->curform->fields); 1111 if(aflagval(tok, Achecked)) 1112 field->flags = FFchecked; 1113 1114 switch(field->ftype) { 1115 case Ftext: 1116 case Fpassword: 1117 case Ffile: 1118 if(field->size == 0) 1119 field->size = 20; 1120 break; 1121 1122 case Fcheckbox: 1123 if(field->name == nil) { 1124 if(warn) 1125 fprint(2, "warning: checkbox form field missing name\n"); 1126 continue; 1127 } 1128 if(field->value == nil) 1129 field->value = _Strdup(L"1"); 1130 break; 1131 1132 case Fradio: 1133 if(field->name == nil || field->value == nil) { 1134 if(warn) 1135 fprint(2, "warning: radio form field missing name or value\n"); 1136 continue; 1137 } 1138 break; 1139 1140 case Fsubmit: 1141 if(field->value == nil) 1142 field->value = _Strdup(L"Submit"); 1143 if(field->name == nil) 1144 field->name = _Strdup(L"_no_name_submit_"); 1145 break; 1146 1147 case Fimage: 1148 src = aurlval(tok, Asrc, nil, di->base); 1149 if(src == nil) { 1150 if(warn) 1151 fprint(2, "warning: image form field missing src\n"); 1152 continue; 1153 } 1154 // width and height attrs aren't specified in HTML 3.2, 1155 // but some people provide them and they help avoid 1156 // a relayout 1157 field->image = newiimage(src, 1158 astrval(tok, Aalt, L"Submit"), 1159 atabval(tok, Aalign, align_tab, NALIGNTAB, ALbottom), 1160 auintval(tok, Awidth, 0), auintval(tok, Aheight, 0), 1161 0, 0, 0, 0, nil); 1162 ii = (Iimage*)field->image; 1163 ii->nextimage = di->images; 1164 di->images = ii; 1165 break; 1166 1167 case Freset: 1168 if(field->value == nil) 1169 field->value = _Strdup(L"Reset"); 1170 break; 1171 1172 case Fbutton: 1173 if(field->value == nil) 1174 field->value = _Strdup(L" "); 1175 break; 1176 } 1177 ffit = newiformfield(field); 1178 additem(ps, ffit, tok); 1179 if(ffit->genattr != nil) 1180 field->events = ffit->genattr->events; 1181 break; 1182 1183 // <!ENTITY ISINDEX - O EMPTY> 1184 case Tisindex: 1185 ps->skipwhite = 0; 1186 prompt = astrval(tok, Aprompt, L"Index search terms:"); 1187 target = atargval(tok, di->target); 1188 additem(ps, textit(ps, prompt), tok); 1189 frm = newform(++is->nforms, 1190 nil, 1191 di->base, 1192 target, 1193 HGet, 1194 di->forms); 1195 di->forms = frm; 1196 ff = newformfield(Ftext, 1197 1, 1198 frm, 1199 _Strdup(L"_ISINDEX_"), 1200 nil, 1201 50, 1202 1000, 1203 nil); 1204 frm->fields = ff; 1205 frm->nfields = 1; 1206 additem(ps, newiformfield(ff), tok); 1207 addbrk(ps, 1, 0); 1208 break; 1209 1210 // <!ELEMENT LI - O %flow> 1211 case Tli: 1212 if(ps->listtypestk.n == 0) { 1213 if(warn) 1214 fprint(2, "<LI> not in list\n"); 1215 continue; 1216 } 1217 ty = top(&ps->listtypestk, 0); 1218 ty2 = listtyval(tok, ty); 1219 if(ty != ty2) { 1220 ty = ty2; 1221 push(&ps->listtypestk, ty2); 1222 } 1223 v = aintval(tok, Avalue, top(&ps->listcntstk, 1)); 1224 if(ty == LTdisc || ty == LTsquare || ty == LTcircle) 1225 hang = 10*LISTTAB - 3; 1226 else 1227 hang = 10*LISTTAB - 1; 1228 changehang(ps, hang); 1229 addtext(ps, listmark(ty, v)); 1230 push(&ps->listcntstk, v + 1); 1231 changehang(ps, -hang); 1232 ps->skipwhite = 1; 1233 break; 1234 1235 // <!ELEMENT MAP - - (AREA)+> 1236 case Tmap: 1237 if(_tokaval(tok, Aname, &name, 0)) 1238 is->curmap = getmap(di, name); 1239 break; 1240 1241 case Tmap+RBRA: 1242 map = is->curmap; 1243 if(map == nil) { 1244 if(warn) 1245 fprint(2, "warning: unexpected </MAP>\n"); 1246 continue; 1247 } 1248 map->areas = (Area*)_revlist((List*)map->areas); 1249 break; 1250 1251 case Tmeta: 1252 if(ps->skipping) 1253 continue; 1254 if(_tokaval(tok, Ahttp_equiv, &equiv, 0)) { 1255 val = aval(tok, Acontent); 1256 n = _Strlen(equiv); 1257 if(!_Strncmpci(equiv, n, L"refresh")) 1258 di->refresh = val; 1259 else if(!_Strncmpci(equiv, n, L"content-script-type")) { 1260 n = _Strlen(val); 1261 if(!_Strncmpci(val, n, L"javascript") 1262 || !_Strncmpci(val, n, L"jscript1.1") 1263 || !_Strncmpci(val, n, L"jscript")) 1264 di->scripttype = TextJavascript; 1265 else { 1266 if(warn) 1267 fprint(2, "unimplemented script type %S\n", val); 1268 di->scripttype = UnknownType; 1269 } 1270 } 1271 } 1272 break; 1273 1274 // Nobr is NOT in HMTL 4.0, but it is ubiquitous on the web 1275 case Tnobr: 1276 ps->skipwhite = 0; 1277 ps->curstate &= ~IFwrap; 1278 break; 1279 1280 case Tnobr+RBRA: 1281 ps->curstate |= IFwrap; 1282 break; 1283 1284 // We do frames, so skip stuff in noframes 1285 case Tnoframes: 1286 ps->skipping = 1; 1287 break; 1288 1289 case Tnoframes+RBRA: 1290 ps->skipping = 0; 1291 break; 1292 1293 // We do scripts (if enabled), so skip stuff in noscripts 1294 case Tnoscript: 1295 if(doscripts) 1296 ps->skipping = 1; 1297 break; 1298 1299 case Tnoscript+RBRA: 1300 if(doscripts) 1301 ps->skipping = 0; 1302 break; 1303 1304 // <!ELEMENT OPTION - O ( //PCDATA)> 1305 case Toption: 1306 if(is->curform == nil || is->curform->fields == nil) { 1307 if(warn) 1308 fprint(2, "warning: <OPTION> not in <SELECT>\n"); 1309 continue; 1310 } 1311 field = is->curform->fields; 1312 if(field->ftype != Fselect) { 1313 if(warn) 1314 fprint(2, "warning: <OPTION> not in <SELECT>\n"); 1315 continue; 1316 } 1317 val = aval(tok, Avalue); 1318 option = newoption(aflagval(tok, Aselected), val, nil, field->options); 1319 field->options = option; 1320 option->display = getpcdata(toks, tokslen, &toki); 1321 if(val == nil) 1322 option->value = _Strdup(option->display); 1323 break; 1324 1325 // <!ELEMENT P - O (%text)* > 1326 case Tp: 1327 pushjust(ps, atabval(tok, Aalign, align_tab, NALIGNTAB, ps->curjust)); 1328 ps->inpar = 1; 1329 ps->skipwhite = 1; 1330 break; 1331 1332 case Tp+RBRA: 1333 break; 1334 1335 // <!ELEMENT PARAM - O EMPTY> 1336 // Do something when we do applets... 1337 case Tparam: 1338 break; 1339 1340 // <!ELEMENT PRE - - (%text)* -(IMG|BIG|SMALL|SUB|SUP|FONT) > 1341 case Tpre: 1342 ps->curstate &= ~IFwrap; 1343 ps->literal = 1; 1344 ps->skipwhite = 0; 1345 pushfontstyle(ps, FntT); 1346 break; 1347 1348 case Tpre+RBRA: 1349 ps->curstate |= IFwrap; 1350 if(ps->literal) { 1351 popfontstyle(ps); 1352 ps->literal = 0; 1353 } 1354 break; 1355 1356 // <!ELEMENT SCRIPT - - CDATA> 1357 case Tscript: 1358 if(doscripts) { 1359 if(!di->hasscripts) { 1360 if(di->scripttype == TextJavascript) { 1361 // TODO: initialize script if nec. 1362 // initjscript(di); 1363 di->hasscripts = 1; 1364 } 1365 } 1366 } 1367 if(!di->hasscripts) { 1368 if(warn) 1369 fprint(2, "warning: <SCRIPT> ignored\n"); 1370 ps->skipping = 1; 1371 } 1372 else { 1373 scriptsrc = aurlval(tok, Asrc, nil, di->base); 1374 script = nil; 1375 if(scriptsrc != nil) { 1376 if(warn) 1377 fprint(2, "warning: non-local <SCRIPT> ignored\n"); 1378 free(scriptsrc); 1379 } 1380 else { 1381 script = getpcdata(toks, tokslen, &toki); 1382 } 1383 if(script != nil) { 1384 if(warn) 1385 fprint(2, "script ignored\n"); 1386 free(script); 1387 } 1388 } 1389 break; 1390 1391 case Tscript+RBRA: 1392 ps->skipping = 0; 1393 break; 1394 1395 // <!ELEMENT SELECT - - (OPTION+)> 1396 case Tselect: 1397 if(is->curform == nil) { 1398 if(warn) 1399 fprint(2, "<SELECT> not inside <FORM>\n"); 1400 continue; 1401 } 1402 field = newformfield(Fselect, 1403 ++is->curform->nfields, 1404 is->curform, 1405 aval(tok, Aname), 1406 nil, 1407 auintval(tok, Asize, 0), 1408 0, 1409 is->curform->fields); 1410 is->curform->fields = field; 1411 if(aflagval(tok, Amultiple)) 1412 field->flags = FFmultiple; 1413 ffit = newiformfield(field); 1414 additem(ps, ffit, tok); 1415 if(ffit->genattr != nil) 1416 field->events = ffit->genattr->events; 1417 // throw away stuff until next tag (should be <OPTION>) 1418 s = getpcdata(toks, tokslen, &toki); 1419 if(s != nil) 1420 free(s); 1421 break; 1422 1423 case Tselect+RBRA: 1424 if(is->curform == nil || is->curform->fields == nil) { 1425 if(warn) 1426 fprint(2, "warning: unexpected </SELECT>\n"); 1427 continue; 1428 } 1429 field = is->curform->fields; 1430 if(field->ftype != Fselect) 1431 continue; 1432 // put options back in input order 1433 field->options = (Option*)_revlist((List*)field->options); 1434 break; 1435 1436 // <!ELEMENT (STRIKE|U) - - (%text)*> 1437 case Tstrike: 1438 case Tu: 1439 ps->curul = push(&ps->ulstk, (tag==Tstrike)? ULmid : ULunder); 1440 break; 1441 1442 case Tstrike+RBRA: 1443 case Tu+RBRA: 1444 if(ps->ulstk.n == 0) { 1445 if(warn) 1446 fprint(2, "warning: unexpected %T\n", tok); 1447 continue; 1448 } 1449 ps->curul = popretnewtop(&ps->ulstk, ULnone); 1450 break; 1451 1452 // <!ELEMENT STYLE - - CDATA> 1453 case Tstyle: 1454 if(warn) 1455 fprint(2, "warning: unimplemented <STYLE>\n"); 1456 ps->skipping = 1; 1457 break; 1458 1459 case Tstyle+RBRA: 1460 ps->skipping = 0; 1461 break; 1462 1463 // <!ELEMENT (SUB|SUP) - - (%text)*> 1464 case Tsub: 1465 case Tsup: 1466 if(tag == Tsub) 1467 ps->curvoff += SUBOFF; 1468 else 1469 ps->curvoff -= SUPOFF; 1470 push(&ps->voffstk, ps->curvoff); 1471 sz = top(&ps->fntsizestk, Normal); 1472 pushfontsize(ps, sz - 1); 1473 break; 1474 1475 case Tsub+RBRA: 1476 case Tsup+RBRA: 1477 if(ps->voffstk.n == 0) { 1478 if(warn) 1479 fprint(2, "warning: unexpected %T\n", tok); 1480 continue; 1481 } 1482 ps->curvoff = popretnewtop(&ps->voffstk, 0); 1483 popfontsize(ps); 1484 break; 1485 1486 // <!ELEMENT TABLE - - (CAPTION?, TR+)> 1487 case Ttable: 1488 ps->skipwhite = 0; 1489 tab = newtable(++is->ntables, 1490 aalign(tok), 1491 adimen(tok, Awidth), 1492 aflagval(tok, Aborder), 1493 auintval(tok, Acellspacing, TABSP), 1494 auintval(tok, Acellpadding, TABPAD), 1495 makebackground(nil, acolorval(tok, Abgcolor, ps->curbg.color)), 1496 tok, 1497 is->tabstk); 1498 is->tabstk = tab; 1499 curtab = tab; 1500 break; 1501 1502 case Ttable+RBRA: 1503 if(curtab == nil) { 1504 if(warn) 1505 fprint(2, "warning: unexpected </TABLE>\n"); 1506 continue; 1507 } 1508 isempty = (curtab->cells == nil); 1509 if(isempty) { 1510 if(warn) 1511 fprint(2, "warning: <TABLE> has no cells\n"); 1512 } 1513 else { 1514 ps = finishcell(curtab, ps); 1515 if(curtab->rows != nil) 1516 curtab->rows->flags = 0; 1517 finish_table(curtab); 1518 } 1519 ps->skipping = 0; 1520 if(!isempty) { 1521 tabitem = newitable(curtab); 1522 al = curtab->align.halign; 1523 switch(al) { 1524 case ALleft: 1525 case ALright: 1526 additem(ps, newifloat(tabitem, al), tok); 1527 break; 1528 default: 1529 if(al == ALcenter) 1530 pushjust(ps, ALcenter); 1531 addbrk(ps, 0, 0); 1532 if(ps->inpar) { 1533 popjust(ps); 1534 ps->inpar = 0; 1535 } 1536 additem(ps, tabitem, curtab->tabletok); 1537 if(al == ALcenter) 1538 popjust(ps); 1539 break; 1540 } 1541 } 1542 if(is->tabstk == nil) { 1543 if(warn) 1544 fprint(2, "warning: table stack is wrong\n"); 1545 } 1546 else 1547 is->tabstk = is->tabstk->next; 1548 curtab->next = di->tables; 1549 di->tables = curtab; 1550 curtab = is->tabstk; 1551 if(!isempty) 1552 addbrk(ps, 0, 0); 1553 break; 1554 1555 // <!ELEMENT (TH|TD) - O %body.content> 1556 // Cells for a row are accumulated in reverse order. 1557 // We push ps on a stack, and use a new one to accumulate 1558 // the contents of the cell. 1559 case Ttd: 1560 case Tth: 1561 if(curtab == nil) { 1562 if(warn) 1563 fprint(2, "%T outside <TABLE>\n", tok); 1564 continue; 1565 } 1566 if(ps->inpar) { 1567 popjust(ps); 1568 ps->inpar = 0; 1569 } 1570 ps = finishcell(curtab, ps); 1571 tr = nil; 1572 if(curtab->rows != nil) 1573 tr = curtab->rows; 1574 if(tr == nil || !tr->flags) { 1575 if(warn) 1576 fprint(2, "%T outside row\n", tok); 1577 tr = newtablerow(makealign(ALnone, ALnone), 1578 makebackground(nil, curtab->background.color), 1579 TFparsing, 1580 curtab->rows); 1581 curtab->rows = tr; 1582 } 1583 ps = cell_pstate(ps, tag == Tth); 1584 flags = TFparsing; 1585 if(aflagval(tok, Anowrap)) { 1586 flags |= TFnowrap; 1587 ps->curstate &= ~IFwrap; 1588 } 1589 if(tag == Tth) 1590 flags |= TFisth; 1591 c = newtablecell(curtab->cells==nil? 1 : curtab->cells->cellid+1, 1592 auintval(tok, Arowspan, 1), 1593 auintval(tok, Acolspan, 1), 1594 aalign(tok), 1595 adimen(tok, Awidth), 1596 auintval(tok, Aheight, 0), 1597 makebackground(nil, acolorval(tok, Abgcolor, tr->background.color)), 1598 flags, 1599 curtab->cells); 1600 curtab->cells = c; 1601 ps->curbg = c->background; 1602 if(c->align.halign == ALnone) { 1603 if(tr->align.halign != ALnone) 1604 c->align.halign = tr->align.halign; 1605 else if(tag == Tth) 1606 c->align.halign = ALcenter; 1607 else 1608 c->align.halign = ALleft; 1609 } 1610 if(c->align.valign == ALnone) { 1611 if(tr->align.valign != ALnone) 1612 c->align.valign = tr->align.valign; 1613 else 1614 c->align.valign = ALmiddle; 1615 } 1616 c->nextinrow = tr->cells; 1617 tr->cells = c; 1618 break; 1619 1620 case Ttd+RBRA: 1621 case Tth+RBRA: 1622 if(curtab == nil || curtab->cells == nil) { 1623 if(warn) 1624 fprint(2, "unexpected %T\n", tok); 1625 continue; 1626 } 1627 ps = finishcell(curtab, ps); 1628 break; 1629 1630 // <!ELEMENT TEXTAREA - - ( //PCDATA)> 1631 case Ttextarea: 1632 if(is->curform == nil) { 1633 if(warn) 1634 fprint(2, "<TEXTAREA> not inside <FORM>\n"); 1635 continue; 1636 } 1637 field = newformfield(Ftextarea, 1638 ++is->curform->nfields, 1639 is->curform, 1640 aval(tok, Aname), 1641 nil, 1642 0, 1643 0, 1644 is->curform->fields); 1645 is->curform->fields = field; 1646 field->rows = auintval(tok, Arows, 3); 1647 field->cols = auintval(tok, Acols, 50); 1648 field->value = getpcdata(toks, tokslen, &toki); 1649 if(warn && toki < tokslen - 1 && toks[toki + 1].tag != Ttextarea + RBRA) 1650 fprint(2, "warning: <TEXTAREA> data ended by %T\n", &toks[toki + 1]); 1651 ffit = newiformfield(field); 1652 additem(ps, ffit, tok); 1653 if(ffit->genattr != nil) 1654 field->events = ffit->genattr->events; 1655 break; 1656 1657 // <!ELEMENT TITLE - - ( //PCDATA)* -(%head.misc)> 1658 case Ttitle: 1659 di->doctitle = getpcdata(toks, tokslen, &toki); 1660 if(warn && toki < tokslen - 1 && toks[toki + 1].tag != Ttitle + RBRA) 1661 fprint(2, "warning: <TITLE> data ended by %T\n", &toks[toki + 1]); 1662 break; 1663 1664 // <!ELEMENT TR - O (TH|TD)+> 1665 // rows are accumulated in reverse order in curtab->rows 1666 case Ttr: 1667 if(curtab == nil) { 1668 if(warn) 1669 fprint(2, "warning: <TR> outside <TABLE>\n"); 1670 continue; 1671 } 1672 if(ps->inpar) { 1673 popjust(ps); 1674 ps->inpar = 0; 1675 } 1676 ps = finishcell(curtab, ps); 1677 if(curtab->rows != nil) 1678 curtab->rows->flags = 0; 1679 curtab->rows = newtablerow(aalign(tok), 1680 makebackground(nil, acolorval(tok, Abgcolor, curtab->background.color)), 1681 TFparsing, 1682 curtab->rows); 1683 break; 1684 1685 case Ttr+RBRA: 1686 if(curtab == nil || curtab->rows == nil) { 1687 if(warn) 1688 fprint(2, "warning: unexpected </TR>\n"); 1689 continue; 1690 } 1691 ps = finishcell(curtab, ps); 1692 tr = curtab->rows; 1693 if(tr->cells == nil) { 1694 if(warn) 1695 fprint(2, "warning: empty row\n"); 1696 curtab->rows = tr->next; 1697 tr->next = nil; 1698 } 1699 else 1700 tr->flags = 0; 1701 break; 1702 1703 // <!ELEMENT (TT|CODE|KBD|SAMP) - - (%text)*> 1704 case Ttt: 1705 case Tcode: 1706 case Tkbd: 1707 case Tsamp: 1708 pushfontstyle(ps, FntT); 1709 break; 1710 1711 // Tags that have empty action 1712 case Tabbr: 1713 case Tabbr+RBRA: 1714 case Tacronym: 1715 case Tacronym+RBRA: 1716 case Tarea+RBRA: 1717 case Tbase+RBRA: 1718 case Tbasefont+RBRA: 1719 case Tbr+RBRA: 1720 case Tdd+RBRA: 1721 case Tdt+RBRA: 1722 case Tframe+RBRA: 1723 case Thr+RBRA: 1724 case Thtml: 1725 case Thtml+RBRA: 1726 case Timg+RBRA: 1727 case Tinput+RBRA: 1728 case Tisindex+RBRA: 1729 case Tli+RBRA: 1730 case Tlink: 1731 case Tlink+RBRA: 1732 case Tmeta+RBRA: 1733 case Toption+RBRA: 1734 case Tparam+RBRA: 1735 case Ttextarea+RBRA: 1736 case Ttitle+RBRA: 1737 break; 1738 1739 1740 // Tags not implemented 1741 case Tbdo: 1742 case Tbdo+RBRA: 1743 case Tbutton: 1744 case Tbutton+RBRA: 1745 case Tdel: 1746 case Tdel+RBRA: 1747 case Tfieldset: 1748 case Tfieldset+RBRA: 1749 case Tiframe: 1750 case Tiframe+RBRA: 1751 case Tins: 1752 case Tins+RBRA: 1753 case Tlabel: 1754 case Tlabel+RBRA: 1755 case Tlegend: 1756 case Tlegend+RBRA: 1757 case Tobject: 1758 case Tobject+RBRA: 1759 case Toptgroup: 1760 case Toptgroup+RBRA: 1761 case Tspan: 1762 case Tspan+RBRA: 1763 if(warn) { 1764 if(tag > RBRA) 1765 tag -= RBRA; 1766 fprint(2, "warning: unimplemented HTML tag: %S\n", tagnames[tag]); 1767 } 1768 break; 1769 1770 default: 1771 if(warn) 1772 fprint(2, "warning: unknown HTML tag: %S\n", tok->text); 1773 break; 1774 } 1775 } 1776 // some pages omit trailing </table> 1777 while(curtab != nil) { 1778 if(warn) 1779 fprint(2, "warning: <TABLE> not closed\n"); 1780 if(curtab->cells != nil) { 1781 ps = finishcell(curtab, ps); 1782 if(curtab->cells == nil) { 1783 if(warn) 1784 fprint(2, "warning: empty table\n"); 1785 } 1786 else { 1787 if(curtab->rows != nil) 1788 curtab->rows->flags = 0; 1789 finish_table(curtab); 1790 ps->skipping = 0; 1791 additem(ps, newitable(curtab), curtab->tabletok); 1792 addbrk(ps, 0, 0); 1793 } 1794 } 1795 if(is->tabstk != nil) 1796 is->tabstk = is->tabstk->next; 1797 curtab->next = di->tables; 1798 di->tables = curtab; 1799 curtab = is->tabstk; 1800 } 1801 outerps = lastps(ps); 1802 ans = outerps->items->next; 1803 // note: ans may be nil and di->kids not nil, if there's a frameset! 1804 outerps->items = newispacer(ISPnull); 1805 outerps->lastit = outerps->items; 1806 is->psstk = ps; 1807 if(ans != nil && di->hasscripts) { 1808 // TODO evalscript(nil); 1809 ; 1810 } 1811 1812 return_ans: 1813 if(dbgbuild) { 1814 assert(validitems(ans)); 1815 if(ans == nil) 1816 fprint(2, "getitems returning nil\n"); 1817 else 1818 printitems(ans, "getitems returning:"); 1819 } 1820 return ans; 1821 } 1822 1823 // Concatenate together maximal set of Data tokens, starting at toks[toki+1]. 1824 // Lexer has ensured that there will either be a following non-data token or 1825 // we will be at eof. 1826 // Return emallocd trimmed concatenation, and update *ptoki to last used toki 1827 static Rune* 1828 getpcdata(Token* toks, int tokslen, int* ptoki) 1829 { 1830 Rune* ans; 1831 Rune* p; 1832 Rune* trimans; 1833 int anslen; 1834 int trimanslen; 1835 int toki; 1836 Token* tok; 1837 1838 ans = nil; 1839 anslen = 0; 1840 // first find length of answer 1841 toki = (*ptoki) + 1; 1842 while(toki < tokslen) { 1843 tok = &toks[toki]; 1844 if(tok->tag == Data) { 1845 toki++; 1846 anslen += _Strlen(tok->text); 1847 } 1848 else 1849 break; 1850 } 1851 // now make up the initial answer 1852 if(anslen > 0) { 1853 ans = _newstr(anslen); 1854 p = ans; 1855 toki = (*ptoki) + 1; 1856 while(toki < tokslen) { 1857 tok = &toks[toki]; 1858 if(tok->tag == Data) { 1859 toki++; 1860 p = _Stradd(p, tok->text, _Strlen(tok->text)); 1861 } 1862 else 1863 break; 1864 } 1865 *p = 0; 1866 _trimwhite(ans, anslen, &trimans, &trimanslen); 1867 if(trimanslen != anslen) { 1868 p = ans; 1869 ans = _Strndup(trimans, trimanslen); 1870 free(p); 1871 } 1872 } 1873 *ptoki = toki-1; 1874 return ans; 1875 } 1876 1877 // If still parsing head of curtab->cells list, finish it off 1878 // by transferring the items on the head of psstk to the cell. 1879 // Then pop the psstk and return the new psstk. 1880 static Pstate* 1881 finishcell(Table* curtab, Pstate* psstk) 1882 { 1883 Tablecell* c; 1884 Pstate* psstknext; 1885 1886 c = curtab->cells; 1887 if(c != nil) { 1888 if((c->flags&TFparsing)) { 1889 psstknext = psstk->next; 1890 if(psstknext == nil) { 1891 if(warn) 1892 fprint(2, "warning: parse state stack is wrong\n"); 1893 } 1894 else { 1895 c->content = psstk->items->next; 1896 c->flags &= ~TFparsing; 1897 freepstate(psstk); 1898 psstk = psstknext; 1899 } 1900 } 1901 } 1902 return psstk; 1903 } 1904 1905 // Make a new Pstate for a cell, based on the old pstate, oldps. 1906 // Also, put the new ps on the head of the oldps stack. 1907 static Pstate* 1908 cell_pstate(Pstate* oldps, int ishead) 1909 { 1910 Pstate* ps; 1911 int sty; 1912 1913 ps = newpstate(oldps); 1914 ps->skipwhite = 1; 1915 ps->curanchor = oldps->curanchor; 1916 copystack(&ps->fntstylestk, &oldps->fntstylestk); 1917 copystack(&ps->fntsizestk, &oldps->fntsizestk); 1918 ps->curfont = oldps->curfont; 1919 ps->curfg = oldps->curfg; 1920 ps->curbg = oldps->curbg; 1921 copystack(&ps->fgstk, &oldps->fgstk); 1922 ps->adjsize = oldps->adjsize; 1923 if(ishead) { 1924 sty = ps->curfont%NumSize; 1925 ps->curfont = FntB*NumSize + sty; 1926 } 1927 return ps; 1928 } 1929 1930 // Return a new Pstate with default starting state. 1931 // Use link to add it to head of a list, if any. 1932 static Pstate* 1933 newpstate(Pstate* link) 1934 { 1935 Pstate* ps; 1936 1937 ps = (Pstate*)emalloc(sizeof(Pstate)); 1938 ps->curfont = DefFnt; 1939 ps->curfg = Black; 1940 ps->curbg.image = nil; 1941 ps->curbg.color = White; 1942 ps->curul = ULnone; 1943 ps->curjust = ALleft; 1944 ps->curstate = IFwrap; 1945 ps->items = newispacer(ISPnull); 1946 ps->lastit = ps->items; 1947 ps->prelastit = nil; 1948 ps->next = link; 1949 return ps; 1950 } 1951 1952 // Return last Pstate on psl list 1953 static Pstate* 1954 lastps(Pstate* psl) 1955 { 1956 assert(psl != nil); 1957 while(psl->next != nil) 1958 psl = psl->next; 1959 return psl; 1960 } 1961 1962 // Add it to end of ps item chain, adding in current state from ps. 1963 // Also, if tok is not nil, scan it for generic attributes and assign 1964 // the genattr field of the item accordingly. 1965 static void 1966 additem(Pstate* ps, Item* it, Token* tok) 1967 { 1968 int aid; 1969 int any; 1970 Rune* i; 1971 Rune* c; 1972 Rune* s; 1973 Rune* t; 1974 Attr* a; 1975 SEvent* e; 1976 1977 if(ps->skipping) { 1978 if(warn) 1979 fprint(2, "warning: skipping item: %I\n", it); 1980 return; 1981 } 1982 it->anchorid = ps->curanchor; 1983 it->state |= ps->curstate; 1984 if(tok != nil) { 1985 any = 0; 1986 i = nil; 1987 c = nil; 1988 s = nil; 1989 t = nil; 1990 e = nil; 1991 for(a = tok->attr; a != nil; a = a->next) { 1992 aid = a->attid; 1993 if(!attrinfo[aid]) 1994 continue; 1995 switch(aid) { 1996 case Aid: 1997 i = a->value; 1998 break; 1999 2000 case Aclass: 2001 c = a->value; 2002 break; 2003 2004 case Astyle: 2005 s = a->value; 2006 break; 2007 2008 case Atitle: 2009 t = a->value; 2010 break; 2011 2012 default: 2013 assert(aid >= Aonblur && aid <= Aonunload); 2014 e = newscriptevent(scriptev[a->attid], a->value, e); 2015 break; 2016 } 2017 a->value = nil; 2018 any = 1; 2019 } 2020 if(any) 2021 it->genattr = newgenattr(i, c, s, t, e); 2022 } 2023 ps->curstate &= ~(IFbrk|IFbrksp|IFnobrk|IFcleft|IFcright); 2024 ps->prelastit = ps->lastit; 2025 ps->lastit->next = it; 2026 ps->lastit = it; 2027 } 2028 2029 // Make a text item out of s, 2030 // using current font, foreground, vertical offset and underline state. 2031 static Item* 2032 textit(Pstate* ps, Rune* s) 2033 { 2034 assert(s != nil); 2035 return newitext(s, ps->curfont, ps->curfg, ps->curvoff + Voffbias, ps->curul); 2036 } 2037 2038 // Add text item or items for s, paying attention to 2039 // current font, foreground, baseline offset, underline state, 2040 // and literal mode. Unless we're in literal mode, compress 2041 // whitespace to single blank, and, if curstate has a break, 2042 // trim any leading whitespace. Whether in literal mode or not, 2043 // turn nonbreaking spaces into spacer items with IFnobrk set. 2044 // 2045 // In literal mode, break up s at newlines and add breaks instead. 2046 // Also replace tabs appropriate number of spaces. 2047 // In nonliteral mode, break up the items every 100 or so characters 2048 // just to make the layout algorithm not go quadratic. 2049 // 2050 // addtext assumes ownership of s. 2051 static void 2052 addtext(Pstate* ps, Rune* s) 2053 { 2054 int n; 2055 int i; 2056 int j; 2057 int k; 2058 int col; 2059 int c; 2060 int nsp; 2061 Item* it; 2062 Rune* ss; 2063 Rune* p; 2064 Rune buf[SMALLBUFSIZE]; 2065 2066 assert(s != nil); 2067 n = runestrlen(s); 2068 i = 0; 2069 j = 0; 2070 if(ps->literal) { 2071 col = 0; 2072 while(i < n) { 2073 if(s[i] == '\n') { 2074 if(i > j) { 2075 // trim trailing blanks from line 2076 for(k = i; k > j; k--) 2077 if(s[k - 1] != ' ') 2078 break; 2079 if(k > j) 2080 additem(ps, textit(ps, _Strndup(s+j, k-j)), nil); 2081 } 2082 addlinebrk(ps, 0); 2083 j = i + 1; 2084 col = 0; 2085 } 2086 else { 2087 if(s[i] == '\t') { 2088 col += i - j; 2089 nsp = 8 - (col%8); 2090 // make ss = s[j:i] + nsp spaces 2091 ss = _newstr(i-j+nsp); 2092 p = _Stradd(ss, s+j, i-j); 2093 p = _Stradd(p, L" ", nsp); 2094 *p = 0; 2095 additem(ps, textit(ps, ss), nil); 2096 col += nsp; 2097 j = i + 1; 2098 } 2099 else if(s[i] == NBSP) { 2100 if(i > j) 2101 additem(ps, textit(ps, _Strndup(s+j, i-j)), nil); 2102 addnbsp(ps); 2103 col += (i - j) + 1; 2104 j = i + 1; 2105 } 2106 } 2107 i++; 2108 } 2109 if(i > j) { 2110 if(j == 0 && i == n) { 2111 // just transfer s over 2112 additem(ps, textit(ps, s), nil); 2113 } 2114 else { 2115 additem(ps, textit(ps, _Strndup(s+j, i-j)), nil); 2116 free(s); 2117 } 2118 } 2119 } 2120 else { // not literal mode 2121 if((ps->curstate&IFbrk) || ps->lastit == ps->items) 2122 while(i < n) { 2123 c = s[i]; 2124 if(c >= 256 || !isspace(c)) 2125 break; 2126 i++; 2127 } 2128 p = buf; 2129 for(j = i; i < n; i++) { 2130 assert(p+i-j < buf+SMALLBUFSIZE-1); 2131 c = s[i]; 2132 if(c == NBSP) { 2133 if(i > j) 2134 p = _Stradd(p, s+j, i-j); 2135 if(p > buf) 2136 additem(ps, textit(ps, _Strndup(buf, p-buf)), nil); 2137 p = buf; 2138 addnbsp(ps); 2139 j = i + 1; 2140 continue; 2141 } 2142 if(c < 256 && isspace(c)) { 2143 if(i > j) 2144 p = _Stradd(p, s+j, i-j); 2145 *p++ = ' '; 2146 while(i < n - 1) { 2147 c = s[i + 1]; 2148 if(c >= 256 || !isspace(c)) 2149 break; 2150 i++; 2151 } 2152 j = i + 1; 2153 } 2154 if(i - j >= 100) { 2155 p = _Stradd(p, s+j, i+1-j); 2156 j = i + 1; 2157 } 2158 if(p-buf >= 100) { 2159 additem(ps, textit(ps, _Strndup(buf, p-buf)), nil); 2160 p = buf; 2161 } 2162 } 2163 if(i > j && j < n) { 2164 assert(p+i-j < buf+SMALLBUFSIZE-1); 2165 p = _Stradd(p, s+j, i-j); 2166 } 2167 // don't add a space if previous item ended in a space 2168 if(p-buf == 1 && buf[0] == ' ' && ps->lastit != nil) { 2169 it = ps->lastit; 2170 if(it->tag == Itexttag) { 2171 ss = ((Itext*)it)->s; 2172 k = _Strlen(ss); 2173 if(k > 0 && ss[k] == ' ') 2174 p = buf; 2175 } 2176 } 2177 if(p > buf) 2178 additem(ps, textit(ps, _Strndup(buf, p-buf)), nil); 2179 free(s); 2180 } 2181 } 2182 2183 // Add a break to ps->curstate, with extra space if sp is true. 2184 // If there was a previous break, combine this one's parameters 2185 // with that to make the amt be the max of the two and the clr 2186 // be the most general. (amt will be 0 or 1) 2187 // Also, if the immediately preceding item was a text item, 2188 // trim any whitespace from the end of it, if not in literal mode. 2189 // Finally, if this is at the very beginning of the item list 2190 // (the only thing there is a null spacer), then don't add the space. 2191 static void 2192 addbrk(Pstate* ps, int sp, int clr) 2193 { 2194 int state; 2195 Rune* l; 2196 int nl; 2197 Rune* r; 2198 int nr; 2199 Itext* t; 2200 Rune* s; 2201 2202 state = ps->curstate; 2203 clr = clr|(state&(IFcleft|IFcright)); 2204 if(sp && !(ps->lastit == ps->items)) 2205 sp = IFbrksp; 2206 else 2207 sp = 0; 2208 ps->curstate = IFbrk|sp|(state&~(IFcleft|IFcright))|clr; 2209 if(ps->lastit != ps->items) { 2210 if(!ps->literal && ps->lastit->tag == Itexttag) { 2211 t = (Itext*)ps->lastit; 2212 _splitr(t->s, _Strlen(t->s), notwhitespace, &l, &nl, &r, &nr); 2213 // try to avoid making empty items 2214 // but not crucial f the occasional one gets through 2215 if(nl == 0 && ps->prelastit != nil) { 2216 ps->lastit = ps->prelastit; 2217 ps->lastit->next = nil; 2218 ps->prelastit = nil; 2219 } 2220 else { 2221 s = t->s; 2222 if(nl == 0) { 2223 // need a non-nil pointer to empty string 2224 // (_Strdup(L"") returns nil) 2225 t->s = emalloc(sizeof(Rune)); 2226 t->s[0] = 0; 2227 } 2228 else 2229 t->s = _Strndup(l, nl); 2230 if(s) 2231 free(s); 2232 } 2233 } 2234 } 2235 } 2236 2237 // Add break due to a <br> or a newline within a preformatted section. 2238 // We add a null item first, with current font's height and ascent, to make 2239 // sure that the current line takes up at least that amount of vertical space. 2240 // This ensures that <br>s on empty lines cause blank lines, and that 2241 // multiple <br>s in a row give multiple blank lines. 2242 // However don't add the spacer if the previous item was something that 2243 // takes up space itself. 2244 static void 2245 addlinebrk(Pstate* ps, int clr) 2246 { 2247 int obrkstate; 2248 int b; 2249 2250 // don't want break before our null item unless the previous item 2251 // was also a null item for the purposes of line breaking 2252 obrkstate = ps->curstate&(IFbrk|IFbrksp); 2253 b = IFnobrk; 2254 if(ps->lastit != nil) { 2255 if(ps->lastit->tag == Ispacertag) { 2256 if(((Ispacer*)ps->lastit)->spkind == ISPvline) 2257 b = IFbrk; 2258 } 2259 } 2260 ps->curstate = (ps->curstate&~(IFbrk|IFbrksp))|b; 2261 additem(ps, newispacer(ISPvline), nil); 2262 ps->curstate = (ps->curstate&~(IFbrk|IFbrksp))|obrkstate; 2263 addbrk(ps, 0, clr); 2264 } 2265 2266 // Add a nonbreakable space 2267 static void 2268 addnbsp(Pstate* ps) 2269 { 2270 // if nbsp comes right where a break was specified, 2271 // do the break anyway (nbsp is being used to generate undiscardable 2272 // space rather than to prevent a break) 2273 if((ps->curstate&IFbrk) == 0) 2274 ps->curstate |= IFnobrk; 2275 additem(ps, newispacer(ISPhspace), nil); 2276 // but definitely no break on next item 2277 ps->curstate |= IFnobrk; 2278 } 2279 2280 // Change hang in ps.curstate by delta. 2281 // The amount is in 1/10ths of tabs, and is the amount that 2282 // the current contiguous set of items with a hang value set 2283 // is to be shifted left from its normal (indented) place. 2284 static void 2285 changehang(Pstate* ps, int delta) 2286 { 2287 int amt; 2288 2289 amt = (ps->curstate&IFhangmask) + delta; 2290 if(amt < 0) { 2291 if(warn) 2292 fprint(2, "warning: hang went negative\n"); 2293 amt = 0; 2294 } 2295 ps->curstate = (ps->curstate&~IFhangmask)|amt; 2296 } 2297 2298 // Change indent in ps.curstate by delta. 2299 static void 2300 changeindent(Pstate* ps, int delta) 2301 { 2302 int amt; 2303 2304 amt = ((ps->curstate&IFindentmask) >> IFindentshift) + delta; 2305 if(amt < 0) { 2306 if(warn) 2307 fprint(2, "warning: indent went negative\n"); 2308 amt = 0; 2309 } 2310 ps->curstate = (ps->curstate&~IFindentmask)|(amt << IFindentshift); 2311 } 2312 2313 // Push val on top of stack, and also return value pushed 2314 static int 2315 push(Stack* stk, int val) 2316 { 2317 if(stk->n == Nestmax) { 2318 if(warn) 2319 fprint(2, "warning: build stack overflow\n"); 2320 } 2321 else 2322 stk->slots[stk->n++] = val; 2323 return val; 2324 } 2325 2326 // Pop top of stack 2327 static void 2328 pop(Stack* stk) 2329 { 2330 if(stk->n > 0) 2331 --stk->n; 2332 } 2333 2334 //Return top of stack, using dflt if stack is empty 2335 static int 2336 top(Stack* stk, int dflt) 2337 { 2338 if(stk->n == 0) 2339 return dflt; 2340 return stk->slots[stk->n-1]; 2341 } 2342 2343 // pop, then return new top, with dflt if empty 2344 static int 2345 popretnewtop(Stack* stk, int dflt) 2346 { 2347 if(stk->n == 0) 2348 return dflt; 2349 stk->n--; 2350 if(stk->n == 0) 2351 return dflt; 2352 return stk->slots[stk->n-1]; 2353 } 2354 2355 // Copy fromstk entries into tostk 2356 static void 2357 copystack(Stack* tostk, Stack* fromstk) 2358 { 2359 int n; 2360 2361 n = fromstk->n; 2362 tostk->n = n; 2363 memmove(tostk->slots, fromstk->slots, n*sizeof(int)); 2364 } 2365 2366 static void 2367 popfontstyle(Pstate* ps) 2368 { 2369 pop(&ps->fntstylestk); 2370 setcurfont(ps); 2371 } 2372 2373 static void 2374 pushfontstyle(Pstate* ps, int sty) 2375 { 2376 push(&ps->fntstylestk, sty); 2377 setcurfont(ps); 2378 } 2379 2380 static void 2381 popfontsize(Pstate* ps) 2382 { 2383 pop(&ps->fntsizestk); 2384 setcurfont(ps); 2385 } 2386 2387 static void 2388 pushfontsize(Pstate* ps, int sz) 2389 { 2390 push(&ps->fntsizestk, sz); 2391 setcurfont(ps); 2392 } 2393 2394 static void 2395 setcurfont(Pstate* ps) 2396 { 2397 int sty; 2398 int sz; 2399 2400 sty = top(&ps->fntstylestk, FntR); 2401 sz = top(&ps->fntsizestk, Normal); 2402 if(sz < Tiny) 2403 sz = Tiny; 2404 if(sz > Verylarge) 2405 sz = Verylarge; 2406 ps->curfont = sty*NumSize + sz; 2407 } 2408 2409 static void 2410 popjust(Pstate* ps) 2411 { 2412 pop(&ps->juststk); 2413 setcurjust(ps); 2414 } 2415 2416 static void 2417 pushjust(Pstate* ps, int j) 2418 { 2419 push(&ps->juststk, j); 2420 setcurjust(ps); 2421 } 2422 2423 static void 2424 setcurjust(Pstate* ps) 2425 { 2426 int j; 2427 int state; 2428 2429 j = top(&ps->juststk, ALleft); 2430 if(j != ps->curjust) { 2431 ps->curjust = j; 2432 state = ps->curstate; 2433 state &= ~(IFrjust|IFcjust); 2434 if(j == ALcenter) 2435 state |= IFcjust; 2436 else if(j == ALright) 2437 state |= IFrjust; 2438 ps->curstate = state; 2439 } 2440 } 2441 2442 // Do final rearrangement after table parsing is finished 2443 // and assign cells to grid points 2444 static void 2445 finish_table(Table* t) 2446 { 2447 int ncol; 2448 int nrow; 2449 int r; 2450 Tablerow* rl; 2451 Tablecell* cl; 2452 int* rowspancnt; 2453 Tablecell** rowspancell; 2454 int ri; 2455 int ci; 2456 Tablecell* c; 2457 Tablecell* cnext; 2458 Tablerow* row; 2459 Tablerow* rownext; 2460 int rcols; 2461 int newncol; 2462 int k; 2463 int j; 2464 int cspan; 2465 int rspan; 2466 int i; 2467 2468 rl = t->rows; 2469 t->nrow = nrow = _listlen((List*)rl); 2470 t->rows = (Tablerow*)emalloc(nrow * sizeof(Tablerow)); 2471 ncol = 0; 2472 r = nrow - 1; 2473 for(row = rl; row != nil; row = rownext) { 2474 // copy the data from the allocated Tablerow into the array slot 2475 t->rows[r] = *row; 2476 rownext = row->next; 2477 row = &t->rows[r]; 2478 r--; 2479 rcols = 0; 2480 c = row->cells; 2481 2482 // If rowspan is > 1 but this is the last row, 2483 // reset the rowspan 2484 if(c != nil && c->rowspan > 1 && r == nrow-2) 2485 c->rowspan = 1; 2486 2487 // reverse row->cells list (along nextinrow pointers) 2488 row->cells = nil; 2489 while(c != nil) { 2490 cnext = c->nextinrow; 2491 c->nextinrow = row->cells; 2492 row->cells = c; 2493 rcols += c->colspan; 2494 c = cnext; 2495 } 2496 if(rcols > ncol) 2497 ncol = rcols; 2498 } 2499 t->ncol = ncol; 2500 t->cols = (Tablecol*)emalloc(ncol * sizeof(Tablecol)); 2501 2502 // Reverse cells just so they are drawn in source order. 2503 // Also, trim their contents so they don't end in whitespace. 2504 t->cells = (Tablecell*)_revlist((List*)t->cells); 2505 for(c = t->cells; c != nil; c= c->next) 2506 trim_cell(c); 2507 t->grid = (Tablecell***)emalloc(nrow * sizeof(Tablecell**)); 2508 for(i = 0; i < nrow; i++) 2509 t->grid[i] = (Tablecell**)emalloc(ncol * sizeof(Tablecell*)); 2510 2511 // The following arrays keep track of cells that are spanning 2512 // multiple rows; rowspancnt[i] is the number of rows left 2513 // to be spanned in column i. 2514 // When done, cell's (row,col) is upper left grid point. 2515 rowspancnt = (int*)emalloc(ncol * sizeof(int)); 2516 rowspancell = (Tablecell**)emalloc(ncol * sizeof(Tablecell*)); 2517 for(ri = 0; ri < nrow; ri++) { 2518 row = &t->rows[ri]; 2519 cl = row->cells; 2520 ci = 0; 2521 while(ci < ncol || cl != nil) { 2522 if(ci < ncol && rowspancnt[ci] > 0) { 2523 t->grid[ri][ci] = rowspancell[ci]; 2524 rowspancnt[ci]--; 2525 ci++; 2526 } 2527 else { 2528 if(cl == nil) { 2529 ci++; 2530 continue; 2531 } 2532 c = cl; 2533 cl = cl->nextinrow; 2534 cspan = c->colspan; 2535 rspan = c->rowspan; 2536 if(ci + cspan > ncol) { 2537 // because of row spanning, we calculated 2538 // ncol incorrectly; adjust it 2539 newncol = ci + cspan; 2540 t->cols = (Tablecol*)erealloc(t->cols, newncol * sizeof(Tablecol)); 2541 rowspancnt = (int*)erealloc(rowspancnt, newncol * sizeof(int)); 2542 rowspancell = (Tablecell**)erealloc(rowspancell, newncol * sizeof(Tablecell*)); 2543 k = newncol-ncol; 2544 memset(t->cols+ncol, 0, k*sizeof(Tablecol)); 2545 memset(rowspancnt+ncol, 0, k*sizeof(int)); 2546 memset(rowspancell+ncol, 0, k*sizeof(Tablecell*)); 2547 for(j = 0; j < nrow; j++) { 2548 t->grid[j] = (Tablecell**)erealloc(t->grid[j], newncol * sizeof(Tablecell*)); 2549 memset(t->grid[j], 0, k*sizeof(Tablecell*)); 2550 } 2551 t->ncol = ncol = newncol; 2552 } 2553 c->row = ri; 2554 c->col = ci; 2555 for(i = 0; i < cspan; i++) { 2556 t->grid[ri][ci] = c; 2557 if(rspan > 1) { 2558 rowspancnt[ci] = rspan - 1; 2559 rowspancell[ci] = c; 2560 } 2561 ci++; 2562 } 2563 } 2564 } 2565 } 2566 } 2567 2568 // Remove tail of cell content until it isn't whitespace. 2569 static void 2570 trim_cell(Tablecell* c) 2571 { 2572 int dropping; 2573 Rune* s; 2574 Rune* x; 2575 Rune* y; 2576 int nx; 2577 int ny; 2578 Item* p; 2579 Itext* q; 2580 Item* pprev; 2581 2582 dropping = 1; 2583 while(c->content != nil && dropping) { 2584 p = c->content; 2585 pprev = nil; 2586 while(p->next != nil) { 2587 pprev = p; 2588 p = p->next; 2589 } 2590 dropping = 0; 2591 if(!(p->state&IFnobrk)) { 2592 if(p->tag == Itexttag) { 2593 q = (Itext*)p; 2594 s = q->s; 2595 _splitr(s, _Strlen(s), notwhitespace, &x, &nx, &y, &ny); 2596 if(nx != 0 && ny != 0) { 2597 q->s = _Strndup(x, nx); 2598 free(s); 2599 } 2600 break; 2601 } 2602 } 2603 if(dropping) { 2604 if(pprev == nil) 2605 c->content = nil; 2606 else 2607 pprev->next = nil; 2608 freeitem(p); 2609 } 2610 } 2611 } 2612 2613 // Caller must free answer (eventually). 2614 static Rune* 2615 listmark(uchar ty, int n) 2616 { 2617 Rune* s; 2618 Rune* t; 2619 int n2; 2620 int i; 2621 2622 s = nil; 2623 switch(ty) { 2624 case LTdisc: 2625 case LTsquare: 2626 case LTcircle: 2627 s = _newstr(1); 2628 s[0] = (ty == LTdisc)? 0x2022 // bullet 2629 : ((ty == LTsquare)? 0x220e // filled square 2630 : 0x2218); // degree 2631 s[1] = 0; 2632 break; 2633 2634 case LT1: 2635 t = _ltoStr(n); 2636 n2 = _Strlen(t); 2637 s = _newstr(n2+1); 2638 t = _Stradd(s, t, n2); 2639 *t++ = '.'; 2640 *t = 0; 2641 break; 2642 2643 case LTa: 2644 case LTA: 2645 n--; 2646 i = 0; 2647 if(n < 0) 2648 n = 0; 2649 s = _newstr((n <= 25)? 2 : 3); 2650 if(n > 25) { 2651 n2 = n%26; 2652 n /= 26; 2653 if(n2 > 25) 2654 n2 = 25; 2655 s[i++] = n2 + (ty == LTa)? 'a' : 'A'; 2656 } 2657 s[i++] = n + (ty == LTa)? 'a' : 'A'; 2658 s[i++] = '.'; 2659 s[i] = 0; 2660 break; 2661 2662 case LTi: 2663 case LTI: 2664 if(n >= NROMAN) { 2665 if(warn) 2666 fprint(2, "warning: unimplemented roman number > %d\n", NROMAN); 2667 n = NROMAN; 2668 } 2669 t = roman[n - 1]; 2670 n2 = _Strlen(t); 2671 s = _newstr(n2+1); 2672 for(i = 0; i < n2; i++) 2673 s[i] = (ty == LTi)? tolower(t[i]) : t[i]; 2674 s[i++] = '.'; 2675 s[i] = 0; 2676 break; 2677 } 2678 return s; 2679 } 2680 2681 // Find map with given name in di.maps. 2682 // If not there, add one, copying name. 2683 // Ownership of map remains with di->maps list. 2684 static Map* 2685 getmap(Docinfo* di, Rune* name) 2686 { 2687 Map* m; 2688 2689 for(m = di->maps; m != nil; m = m->next) { 2690 if(!_Strcmp(name, m->name)) 2691 return m; 2692 } 2693 m = (Map*)emalloc(sizeof(Map)); 2694 m->name = _Strdup(name); 2695 m->areas = nil; 2696 m->next = di->maps; 2697 di->maps = m; 2698 return m; 2699 } 2700 2701 // Transfers ownership of href to Area 2702 static Area* 2703 newarea(int shape, Rune* href, int target, Area* link) 2704 { 2705 Area* a; 2706 2707 a = (Area*)emalloc(sizeof(Area)); 2708 a->shape = shape; 2709 a->href = href; 2710 a->target = target; 2711 a->next = link; 2712 return a; 2713 } 2714 2715 // Return string value associated with attid in tok, nil if none. 2716 // Caller must free the result (eventually). 2717 static Rune* 2718 aval(Token* tok, int attid) 2719 { 2720 Rune* ans; 2721 2722 _tokaval(tok, attid, &ans, 1); // transfers string ownership from token to ans 2723 return ans; 2724 } 2725 2726 // Like aval, but use dflt if there was no such attribute in tok. 2727 // Caller must free the result (eventually). 2728 static Rune* 2729 astrval(Token* tok, int attid, Rune* dflt) 2730 { 2731 Rune* ans; 2732 2733 if(_tokaval(tok, attid, &ans, 1)) 2734 return ans; // transfers string ownership from token to ans 2735 else 2736 return _Strdup(dflt); 2737 } 2738 2739 // Here we're supposed to convert to an int, 2740 // and have a default when not found 2741 static int 2742 aintval(Token* tok, int attid, int dflt) 2743 { 2744 Rune* ans; 2745 2746 if(!_tokaval(tok, attid, &ans, 0) || ans == nil) 2747 return dflt; 2748 else 2749 return toint(ans); 2750 } 2751 2752 // Like aintval, but result should be >= 0 2753 static int 2754 auintval(Token* tok, int attid, int dflt) 2755 { 2756 Rune* ans; 2757 int v; 2758 2759 if(!_tokaval(tok, attid, &ans, 0) || ans == nil) 2760 return dflt; 2761 else { 2762 v = toint(ans); 2763 return v >= 0? v : 0; 2764 } 2765 } 2766 2767 // int conversion, but with possible error check (if warning) 2768 static int 2769 toint(Rune* s) 2770 { 2771 int ans; 2772 Rune* eptr; 2773 2774 ans = _Strtol(s, &eptr, 10); 2775 if(warn) { 2776 if(*eptr != 0) { 2777 eptr = _Strclass(eptr, notwhitespace); 2778 if(eptr != nil) 2779 fprint(2, "warning: expected integer, got %S\n", s); 2780 } 2781 } 2782 return ans; 2783 } 2784 2785 // Attribute value when need a table to convert strings to ints 2786 static int 2787 atabval(Token* tok, int attid, StringInt* tab, int ntab, int dflt) 2788 { 2789 Rune* aval; 2790 int ans; 2791 2792 ans = dflt; 2793 if(_tokaval(tok, attid, &aval, 0)) { 2794 if(!_lookup(tab, ntab, aval, _Strlen(aval), &ans)) { 2795 ans = dflt; 2796 if(warn) 2797 fprint(2, "warning: name not found in table lookup: %S\n", aval); 2798 } 2799 } 2800 return ans; 2801 } 2802 2803 // Attribute value when supposed to be a color 2804 static int 2805 acolorval(Token* tok, int attid, int dflt) 2806 { 2807 Rune* aval; 2808 int ans; 2809 2810 ans = dflt; 2811 if(_tokaval(tok, attid, &aval, 0)) 2812 ans = color(aval, dflt); 2813 return ans; 2814 } 2815 2816 // Attribute value when supposed to be a target frame name 2817 static int 2818 atargval(Token* tok, int dflt) 2819 { 2820 int ans; 2821 Rune* aval; 2822 2823 ans = dflt; 2824 if(_tokaval(tok, Atarget, &aval, 0)){ 2825 ans = targetid(aval); 2826 } 2827 return ans; 2828 } 2829 2830 // special for list types, where "i" and "I" are different, 2831 // but "square" and "SQUARE" are the same 2832 static int 2833 listtyval(Token* tok, int dflt) 2834 { 2835 Rune* aval; 2836 int ans; 2837 int n; 2838 2839 ans = dflt; 2840 if(_tokaval(tok, Atype, &aval, 0)) { 2841 n = _Strlen(aval); 2842 if(n == 1) { 2843 switch(aval[0]) { 2844 case '1': 2845 ans = LT1; 2846 break; 2847 case 'A': 2848 ans = LTA; 2849 break; 2850 case 'I': 2851 ans = LTI; 2852 break; 2853 case 'a': 2854 ans = LTa; 2855 break; 2856 case 'i': 2857 ans = LTi; 2858 default: 2859 if(warn) 2860 fprint(2, "warning: unknown list element type %c\n", aval[0]); 2861 } 2862 } 2863 else { 2864 if(!_Strncmpci(aval, n, L"circle")) 2865 ans = LTcircle; 2866 else if(!_Strncmpci(aval, n, L"disc")) 2867 ans = LTdisc; 2868 else if(!_Strncmpci(aval, n, L"square")) 2869 ans = LTsquare; 2870 else { 2871 if(warn) 2872 fprint(2, "warning: unknown list element type %S\n", aval); 2873 } 2874 } 2875 } 2876 return ans; 2877 } 2878 2879 // Attribute value when value is a URL, possibly relative to base. 2880 // FOR NOW: leave the url relative. 2881 // Caller must free the result (eventually). 2882 static Rune* 2883 aurlval(Token* tok, int attid, Rune* dflt, Rune* base) 2884 { 2885 Rune* ans; 2886 Rune* url; 2887 2888 USED(base); 2889 ans = nil; 2890 if(_tokaval(tok, attid, &url, 0) && url != nil) 2891 ans = removeallwhite(url); 2892 if(ans == nil) 2893 ans = _Strdup(dflt); 2894 return ans; 2895 } 2896 2897 // Return copy of s but with all whitespace (even internal) removed. 2898 // This fixes some buggy URL specification strings. 2899 static Rune* 2900 removeallwhite(Rune* s) 2901 { 2902 int j; 2903 int n; 2904 int i; 2905 int c; 2906 Rune* ans; 2907 2908 j = 0; 2909 n = _Strlen(s); 2910 for(i = 0; i < n; i++) { 2911 c = s[i]; 2912 if(c >= 256 || !isspace(c)) 2913 j++; 2914 } 2915 if(j < n) { 2916 ans = _newstr(j); 2917 j = 0; 2918 for(i = 0; i < n; i++) { 2919 c = s[i]; 2920 if(c >= 256 || !isspace(c)) 2921 ans[j++] = c; 2922 } 2923 ans[j] = 0; 2924 } 2925 else 2926 ans = _Strdup(s); 2927 return ans; 2928 } 2929 2930 // Attribute value when mere presence of attr implies value of 1, 2931 // but if there is an integer there, return it as the value. 2932 static int 2933 aflagval(Token* tok, int attid) 2934 { 2935 int val; 2936 Rune* sval; 2937 2938 val = 0; 2939 if(_tokaval(tok, attid, &sval, 0)) { 2940 val = 1; 2941 if(sval != nil) 2942 val = toint(sval); 2943 } 2944 return val; 2945 } 2946 2947 static Align 2948 makealign(int halign, int valign) 2949 { 2950 Align al; 2951 2952 al.halign = halign; 2953 al.valign = valign; 2954 return al; 2955 } 2956 2957 // Make an Align (two alignments, horizontal and vertical) 2958 static Align 2959 aalign(Token* tok) 2960 { 2961 return makealign( 2962 atabval(tok, Aalign, align_tab, NALIGNTAB, ALnone), 2963 atabval(tok, Avalign, align_tab, NALIGNTAB, ALnone)); 2964 } 2965 2966 // Make a Dimen, based on value of attid attr 2967 static Dimen 2968 adimen(Token* tok, int attid) 2969 { 2970 Rune* wd; 2971 2972 if(_tokaval(tok, attid, &wd, 0)) 2973 return parsedim(wd, _Strlen(wd)); 2974 else 2975 return makedimen(Dnone, 0); 2976 } 2977 2978 // Parse s[0:n] as num[.[num]][unit][%|*] 2979 static Dimen 2980 parsedim(Rune* s, int ns) 2981 { 2982 int kind; 2983 int spec; 2984 Rune* l; 2985 int nl; 2986 Rune* r; 2987 int nr; 2988 int mul; 2989 int i; 2990 Rune* f; 2991 int nf; 2992 int Tkdpi; 2993 Rune* units; 2994 2995 kind = Dnone; 2996 spec = 0; 2997 _splitl(s, ns, L"^0-9", &l, &nl, &r, &nr); 2998 if(nl != 0) { 2999 spec = 1000*_Strtol(l, nil, 10); 3000 if(nr > 0 && r[0] == '.') { 3001 _splitl(r+1, nr-1, L"^0-9", &f, &nf, &r, &nr); 3002 if(nf != 0) { 3003 mul = 100; 3004 for(i = 0; i < nf; i++) { 3005 spec = spec + mul*(f[i]-'0'); 3006 mul = mul/10; 3007 } 3008 } 3009 } 3010 kind = Dpixels; 3011 if(nr != 0) { 3012 if(nr >= 2) { 3013 Tkdpi = 100; 3014 units = r; 3015 r = r+2; 3016 nr -= 2; 3017 if(!_Strncmpci(units, 2, L"pt")) 3018 spec = (spec*Tkdpi)/72; 3019 else if(!_Strncmpci(units, 2, L"pi")) 3020 spec = (spec*12*Tkdpi)/72; 3021 else if(!_Strncmpci(units, 2, L"in")) 3022 spec = spec*Tkdpi; 3023 else if(!_Strncmpci(units, 2, L"cm")) 3024 spec = (spec*100*Tkdpi)/254; 3025 else if(!_Strncmpci(units, 2, L"mm")) 3026 spec = (spec*10*Tkdpi)/254; 3027 else if(!_Strncmpci(units, 2, L"em")) 3028 spec = spec*15; 3029 else { 3030 if(warn) 3031 fprint(2, "warning: unknown units %C%Cs\n", units[0], units[1]); 3032 } 3033 } 3034 if(nr >= 1) { 3035 if(r[0] == '%') 3036 kind = Dpercent; 3037 else if(r[0] == '*') 3038 kind = Drelative; 3039 } 3040 } 3041 spec = spec/1000; 3042 } 3043 else if(nr == 1 && r[0] == '*') { 3044 spec = 1; 3045 kind = Drelative; 3046 } 3047 return makedimen(kind, spec); 3048 } 3049 3050 static void 3051 setdimarray(Token* tok, int attid, Dimen** pans, int* panslen) 3052 { 3053 Rune* s; 3054 Dimen* d; 3055 int k; 3056 int nc; 3057 Rune* a[SMALLBUFSIZE]; 3058 int an[SMALLBUFSIZE]; 3059 3060 if(_tokaval(tok, attid, &s, 0)) { 3061 nc = _splitall(s, _Strlen(s), L", ", a, an, SMALLBUFSIZE); 3062 if(nc > 0) { 3063 d = (Dimen*)emalloc(nc * sizeof(Dimen)); 3064 for(k = 0; k < nc; k++) { 3065 d[k] = parsedim(a[k], an[k]); 3066 } 3067 *pans = d; 3068 *panslen = nc; 3069 return; 3070 } 3071 } 3072 *pans = nil; 3073 *panslen = 0; 3074 } 3075 3076 static Background 3077 makebackground(Rune* imageurl, int color) 3078 { 3079 Background bg; 3080 3081 bg.image = imageurl; 3082 bg.color = color; 3083 return bg; 3084 } 3085 3086 static Item* 3087 newitext(Rune* s, int fnt, int fg, int voff, int ul) 3088 { 3089 Itext* t; 3090 3091 assert(s != nil); 3092 t = (Itext*)emalloc(sizeof(Itext)); 3093 t->tag = Itexttag; 3094 t->s = s; 3095 t->fnt = fnt; 3096 t->fg = fg; 3097 t->voff = voff; 3098 t->ul = ul; 3099 return (Item*)t; 3100 } 3101 3102 static Item* 3103 newirule(int align, int size, int noshade, Dimen wspec) 3104 { 3105 Irule* r; 3106 3107 r = (Irule*)emalloc(sizeof(Irule)); 3108 r->tag = Iruletag; 3109 r->align = align; 3110 r->size = size; 3111 r->noshade = noshade; 3112 r->wspec = wspec; 3113 return (Item*)r; 3114 } 3115 3116 // Map is owned elsewhere. 3117 static Item* 3118 newiimage(Rune* src, Rune* altrep, int align, int width, int height, 3119 int hspace, int vspace, int border, int ismap, Map* map) 3120 { 3121 Iimage* i; 3122 int state; 3123 3124 state = 0; 3125 if(ismap) 3126 state = IFsmap; 3127 i = (Iimage*)emalloc(sizeof(Iimage)); 3128 i->tag = Iimagetag; 3129 i->state = state; 3130 i->imsrc = src; 3131 i->altrep = altrep; 3132 i->align = align; 3133 i->imwidth = width; 3134 i->imheight = height; 3135 i->hspace = hspace; 3136 i->vspace = vspace; 3137 i->border = border; 3138 i->map = map; 3139 i->ctlid = -1; 3140 return (Item*)i; 3141 } 3142 3143 static Item* 3144 newiformfield(Formfield* ff) 3145 { 3146 Iformfield* f; 3147 3148 f = (Iformfield*)emalloc(sizeof(Iformfield)); 3149 f->tag = Iformfieldtag; 3150 f->formfield = ff; 3151 return (Item*)f; 3152 } 3153 3154 static Item* 3155 newitable(Table* tab) 3156 { 3157 Itable* t; 3158 3159 t = (Itable*)emalloc(sizeof(Itable)); 3160 t->tag = Itabletag; 3161 t->table = tab; 3162 return (Item*)t; 3163 } 3164 3165 static Item* 3166 newifloat(Item* it, int side) 3167 { 3168 Ifloat* f; 3169 3170 f = (Ifloat*)emalloc(sizeof(Ifloat)); 3171 f->tag = Ifloattag; 3172 f->state = IFwrap; 3173 f->item = it; 3174 f->side = side; 3175 return (Item*)f; 3176 } 3177 3178 static Item* 3179 newispacer(int spkind) 3180 { 3181 Ispacer* s; 3182 3183 s = (Ispacer*)emalloc(sizeof(Ispacer)); 3184 s->tag = Ispacertag; 3185 s->spkind = spkind; 3186 return (Item*)s; 3187 } 3188 3189 // Free one item (caller must deal with next pointer) 3190 static void 3191 freeitem(Item* it) 3192 { 3193 Iimage* ii; 3194 Genattr* ga; 3195 3196 if(it == nil) 3197 return; 3198 3199 switch(it->tag) { 3200 case Itexttag: 3201 free(((Itext*)it)->s); 3202 break; 3203 case Iimagetag: 3204 ii = (Iimage*)it; 3205 free(ii->imsrc); 3206 free(ii->altrep); 3207 break; 3208 case Iformfieldtag: 3209 freeformfield(((Iformfield*)it)->formfield); 3210 break; 3211 case Itabletag: 3212 freetable(((Itable*)it)->table); 3213 break; 3214 case Ifloattag: 3215 freeitem(((Ifloat*)it)->item); 3216 break; 3217 } 3218 ga = it->genattr; 3219 if(ga != nil) { 3220 free(ga->id); 3221 free(ga->class); 3222 free(ga->style); 3223 free(ga->title); 3224 freescriptevents(ga->events); 3225 } 3226 free(it); 3227 } 3228 3229 // Free list of items chained through next pointer 3230 void 3231 freeitems(Item* ithead) 3232 { 3233 Item* it; 3234 Item* itnext; 3235 3236 it = ithead; 3237 while(it != nil) { 3238 itnext = it->next; 3239 freeitem(it); 3240 it = itnext; 3241 } 3242 } 3243 3244 static void 3245 freeformfield(Formfield* ff) 3246 { 3247 Option* o; 3248 Option* onext; 3249 3250 if(ff == nil) 3251 return; 3252 3253 free(ff->name); 3254 free(ff->value); 3255 for(o = ff->options; o != nil; o = onext) { 3256 onext = o->next; 3257 free(o->value); 3258 free(o->display); 3259 } 3260 free(ff); 3261 } 3262 3263 static void 3264 freetable(Table* t) 3265 { 3266 int i; 3267 Tablecell* c; 3268 Tablecell* cnext; 3269 3270 if(t == nil) 3271 return; 3272 3273 // We'll find all the unique cells via t->cells and next pointers. 3274 // (Other pointers to cells in the table are duplicates of these) 3275 for(c = t->cells; c != nil; c = cnext) { 3276 cnext = c->next; 3277 freeitems(c->content); 3278 } 3279 if(t->grid != nil) { 3280 for(i = 0; i < t->nrow; i++) 3281 free(t->grid[i]); 3282 free(t->grid); 3283 } 3284 free(t->rows); 3285 free(t->cols); 3286 freeitems(t->caption); 3287 free(t); 3288 } 3289 3290 static void 3291 freeform(Form* f) 3292 { 3293 if(f == nil) 3294 return; 3295 3296 free(f->name); 3297 free(f->action); 3298 // Form doesn't own its fields (Iformfield items do) 3299 free(f); 3300 } 3301 3302 static void 3303 freeforms(Form* fhead) 3304 { 3305 Form* f; 3306 Form* fnext; 3307 3308 for(f = fhead; f != nil; f = fnext) { 3309 fnext = f->next; 3310 freeform(f); 3311 } 3312 } 3313 3314 static void 3315 freeanchor(Anchor* a) 3316 { 3317 if(a == nil) 3318 return; 3319 3320 free(a->name); 3321 free(a->href); 3322 free(a); 3323 } 3324 3325 static void 3326 freeanchors(Anchor* ahead) 3327 { 3328 Anchor* a; 3329 Anchor* anext; 3330 3331 for(a = ahead; a != nil; a = anext) { 3332 anext = a->next; 3333 freeanchor(a); 3334 } 3335 } 3336 3337 static void 3338 freedestanchor(DestAnchor* da) 3339 { 3340 if(da == nil) 3341 return; 3342 3343 free(da->name); 3344 free(da); 3345 } 3346 3347 static void 3348 freedestanchors(DestAnchor* dahead) 3349 { 3350 DestAnchor* da; 3351 DestAnchor* danext; 3352 3353 for(da = dahead; da != nil; da = danext) { 3354 danext = da->next; 3355 freedestanchor(da); 3356 } 3357 } 3358 3359 static void 3360 freearea(Area* a) 3361 { 3362 if(a == nil) 3363 return; 3364 free(a->href); 3365 free(a->coords); 3366 } 3367 3368 static void freekidinfos(Kidinfo* khead); 3369 3370 static void 3371 freekidinfo(Kidinfo* k) 3372 { 3373 if(k->isframeset) { 3374 free(k->rows); 3375 free(k->cols); 3376 freekidinfos(k->kidinfos); 3377 } 3378 else { 3379 free(k->src); 3380 free(k->name); 3381 } 3382 free(k); 3383 } 3384 3385 static void 3386 freekidinfos(Kidinfo* khead) 3387 { 3388 Kidinfo* k; 3389 Kidinfo* knext; 3390 3391 for(k = khead; k != nil; k = knext) { 3392 knext = k->next; 3393 freekidinfo(k); 3394 } 3395 } 3396 3397 static void 3398 freemap(Map* m) 3399 { 3400 Area* a; 3401 Area* anext; 3402 3403 if(m == nil) 3404 return; 3405 3406 free(m->name); 3407 for(a = m->areas; a != nil; a = anext) { 3408 anext = a->next; 3409 freearea(a); 3410 } 3411 free(m); 3412 } 3413 3414 static void 3415 freemaps(Map* mhead) 3416 { 3417 Map* m; 3418 Map* mnext; 3419 3420 for(m = mhead; m != nil; m = mnext) { 3421 mnext = m->next; 3422 freemap(m); 3423 } 3424 } 3425 3426 void 3427 freedocinfo(Docinfo* d) 3428 { 3429 if(d == nil) 3430 return; 3431 free(d->src); 3432 free(d->base); 3433 freeitem((Item*)d->backgrounditem); 3434 free(d->refresh); 3435 freekidinfos(d->kidinfo); 3436 freeanchors(d->anchors); 3437 freedestanchors(d->dests); 3438 freeforms(d->forms); 3439 freemaps(d->maps); 3440 // tables, images, and formfields are freed when 3441 // the items pointing at them are freed 3442 free(d); 3443 } 3444 3445 // Currently, someone else owns all the memory 3446 // pointed to by things in a Pstate. 3447 static void 3448 freepstate(Pstate* p) 3449 { 3450 free(p); 3451 } 3452 3453 static void 3454 freepstatestack(Pstate* pshead) 3455 { 3456 Pstate* p; 3457 Pstate* pnext; 3458 3459 for(p = pshead; p != nil; p = pnext) { 3460 pnext = p->next; 3461 free(p); 3462 } 3463 } 3464 3465 static int 3466 Iconv(Fmt *f) 3467 { 3468 Item* it; 3469 Itext* t; 3470 Irule* r; 3471 Iimage* i; 3472 Ifloat* fl; 3473 int state; 3474 Formfield* ff; 3475 Rune* ty; 3476 Tablecell* c; 3477 Table* tab; 3478 char* p; 3479 int cl; 3480 int hang; 3481 int indent; 3482 int bi; 3483 int nbuf; 3484 char buf[BIGBUFSIZE]; 3485 3486 it = va_arg(f->args, Item*); 3487 bi = 0; 3488 nbuf = sizeof(buf); 3489 state = it->state; 3490 nbuf = nbuf-1; 3491 if(state&IFbrk) { 3492 cl = state&(IFcleft|IFcright); 3493 p = ""; 3494 if(cl) { 3495 if(cl == (IFcleft|IFcright)) 3496 p = " both"; 3497 else if(cl == IFcleft) 3498 p = " left"; 3499 else 3500 p = " right"; 3501 } 3502 bi = snprint(buf, nbuf, "brk(%d%s)", (state&IFbrksp)? 1 : 0, p); 3503 } 3504 if(state&IFnobrk) 3505 bi += snprint(buf+bi, nbuf-bi, " nobrk"); 3506 if(!(state&IFwrap)) 3507 bi += snprint(buf+bi, nbuf-bi, " nowrap"); 3508 if(state&IFrjust) 3509 bi += snprint(buf+bi, nbuf-bi, " rjust"); 3510 if(state&IFcjust) 3511 bi += snprint(buf+bi, nbuf-bi, " cjust"); 3512 if(state&IFsmap) 3513 bi += snprint(buf+bi, nbuf-bi, " smap"); 3514 indent = (state&IFindentmask) >> IFindentshift; 3515 if(indent > 0) 3516 bi += snprint(buf+bi, nbuf-bi, " indent=%d", indent); 3517 hang = state&IFhangmask; 3518 if(hang > 0) 3519 bi += snprint(buf+bi, nbuf-bi, " hang=%d", hang); 3520 3521 switch(it->tag) { 3522 case Itexttag: 3523 t = (Itext*)it; 3524 bi += snprint(buf+bi, nbuf-bi, " Text '%S', fnt=%d, fg=%x", t->s, t->fnt, t->fg); 3525 break; 3526 3527 case Iruletag: 3528 r = (Irule*)it; 3529 bi += snprint(buf+bi, nbuf-bi, "Rule size=%d, al=%S, wspec=", r->size, stringalign(r->align)); 3530 bi += dimprint(buf+bi, nbuf-bi, r->wspec); 3531 break; 3532 3533 case Iimagetag: 3534 i = (Iimage*)it; 3535 bi += snprint(buf+bi, nbuf-bi, 3536 "Image src=%S, alt=%S, al=%S, w=%d, h=%d hsp=%d, vsp=%d, bd=%d, map=%S", 3537 i->imsrc, i->altrep? i->altrep : L"", stringalign(i->align), i->imwidth, i->imheight, 3538 i->hspace, i->vspace, i->border, i->map? i->map->name : L""); 3539 break; 3540 3541 case Iformfieldtag: 3542 ff = ((Iformfield*)it)->formfield; 3543 if(ff->ftype == Ftextarea) 3544 ty = L"textarea"; 3545 else if(ff->ftype == Fselect) 3546 ty = L"select"; 3547 else { 3548 ty = _revlookup(input_tab, NINPUTTAB, ff->ftype); 3549 if(ty == nil) 3550 ty = L"none"; 3551 } 3552 bi += snprint(buf+bi, nbuf-bi, "Formfield %S, fieldid=%d, formid=%d, name=%S, value=%S", 3553 ty, ff->fieldid, ff->form->formid, ff->name? ff->name : L"", 3554 ff->value? ff->value : L""); 3555 break; 3556 3557 case Itabletag: 3558 tab = ((Itable*)it)->table; 3559 bi += snprint(buf+bi, nbuf-bi, "Table tableid=%d, width=", tab->tableid); 3560 bi += dimprint(buf+bi, nbuf-bi, tab->width); 3561 bi += snprint(buf+bi, nbuf-bi, ", nrow=%d, ncol=%d, ncell=%d, totw=%d, toth=%d\n", 3562 tab->nrow, tab->ncol, tab->ncell, tab->totw, tab->toth); 3563 for(c = tab->cells; c != nil; c = c->next) 3564 bi += snprint(buf+bi, nbuf-bi, "Cell %d.%d, at (%d,%d) ", 3565 tab->tableid, c->cellid, c->row, c->col); 3566 bi += snprint(buf+bi, nbuf-bi, "End of Table %d", tab->tableid); 3567 break; 3568 3569 case Ifloattag: 3570 fl = (Ifloat*)it; 3571 bi += snprint(buf+bi, nbuf-bi, "Float, x=%d y=%d, side=%S, it=%I", 3572 fl->x, fl->y, stringalign(fl->side), fl->item); 3573 bi += snprint(buf+bi, nbuf-bi, "\n\t"); 3574 break; 3575 3576 case Ispacertag: 3577 p = ""; 3578 switch(((Ispacer*)it)->spkind) { 3579 case ISPnull: 3580 p = "null"; 3581 break; 3582 case ISPvline: 3583 p = "vline"; 3584 break; 3585 case ISPhspace: 3586 p = "hspace"; 3587 break; 3588 } 3589 bi += snprint(buf+bi, nbuf-bi, "Spacer %s ", p); 3590 break; 3591 } 3592 bi += snprint(buf+bi, nbuf-bi, " w=%d, h=%d, a=%d, anchor=%d\n", 3593 it->width, it->height, it->ascent, it->anchorid); 3594 buf[bi] = 0; 3595 return fmtstrcpy(f, buf); 3596 } 3597 3598 // String version of alignment 'a' 3599 static Rune* 3600 stringalign(int a) 3601 { 3602 Rune* s; 3603 3604 s = _revlookup(align_tab, NALIGNTAB, a); 3605 if(s == nil) 3606 s = L"none"; 3607 return s; 3608 } 3609 3610 // Put at most nbuf chars of representation of d into buf, 3611 // and return number of characters put 3612 static int 3613 dimprint(char* buf, int nbuf, Dimen d) 3614 { 3615 int n; 3616 int k; 3617 3618 n = 0; 3619 n += snprint(buf, nbuf, "%d", dimenspec(d)); 3620 k = dimenkind(d); 3621 if(k == Dpercent) 3622 buf[n++] = '%'; 3623 if(k == Drelative) 3624 buf[n++] = '*'; 3625 return n; 3626 } 3627 3628 void 3629 printitems(Item* items, char* msg) 3630 { 3631 Item* il; 3632 3633 fprint(2, "%s\n", msg); 3634 il = items; 3635 while(il != nil) { 3636 fprint(2, "%I", il); 3637 il = il->next; 3638 } 3639 } 3640 3641 static Genattr* 3642 newgenattr(Rune* id, Rune* class, Rune* style, Rune* title, SEvent* events) 3643 { 3644 Genattr* g; 3645 3646 g = (Genattr*)emalloc(sizeof(Genattr)); 3647 g->id = id; 3648 g->class = class; 3649 g->style = style; 3650 g->title = title; 3651 g->events = events; 3652 return g; 3653 } 3654 3655 static Formfield* 3656 newformfield(int ftype, int fieldid, Form* form, Rune* name, 3657 Rune* value, int size, int maxlength, Formfield* link) 3658 { 3659 Formfield* ff; 3660 3661 ff = (Formfield*)emalloc(sizeof(Formfield)); 3662 ff->ftype = ftype; 3663 ff->fieldid = fieldid; 3664 ff->form = form; 3665 ff->name = name; 3666 ff->value = value; 3667 ff->size = size; 3668 ff->maxlength = maxlength; 3669 ff->ctlid = -1; 3670 ff->next = link; 3671 return ff; 3672 } 3673 3674 // Transfers ownership of value and display to Option. 3675 static Option* 3676 newoption(int selected, Rune* value, Rune* display, Option* link) 3677 { 3678 Option *o; 3679 3680 o = (Option*)emalloc(sizeof(Option)); 3681 o->selected = selected; 3682 o->value = value; 3683 o->display = display; 3684 o->next = link; 3685 return o; 3686 } 3687 3688 static Form* 3689 newform(int formid, Rune* name, Rune* action, int target, int method, Form* link) 3690 { 3691 Form* f; 3692 3693 f = (Form*)emalloc(sizeof(Form)); 3694 f->formid = formid; 3695 f->name = name; 3696 f->action = action; 3697 f->target = target; 3698 f->method = method; 3699 f->nfields = 0; 3700 f->fields = nil; 3701 f->next = link; 3702 return f; 3703 } 3704 3705 static Table* 3706 newtable(int tableid, Align align, Dimen width, int border, 3707 int cellspacing, int cellpadding, Background bg, Token* tok, Table* link) 3708 { 3709 Table* t; 3710 3711 t = (Table*)emalloc(sizeof(Table)); 3712 t->tableid = tableid; 3713 t->align = align; 3714 t->width = width; 3715 t->border = border; 3716 t->cellspacing = cellspacing; 3717 t->cellpadding = cellpadding; 3718 t->background = bg; 3719 t->caption_place = ALbottom; 3720 t->caption_lay = nil; 3721 t->tabletok = tok; 3722 t->tabletok = nil; 3723 t->next = link; 3724 return t; 3725 } 3726 3727 static Tablerow* 3728 newtablerow(Align align, Background bg, int flags, Tablerow* link) 3729 { 3730 Tablerow* tr; 3731 3732 tr = (Tablerow*)emalloc(sizeof(Tablerow)); 3733 tr->align = align; 3734 tr->background = bg; 3735 tr->flags = flags; 3736 tr->next = link; 3737 return tr; 3738 } 3739 3740 static Tablecell* 3741 newtablecell(int cellid, int rowspan, int colspan, Align align, Dimen wspec, int hspec, 3742 Background bg, int flags, Tablecell* link) 3743 { 3744 Tablecell* c; 3745 3746 c = (Tablecell*)emalloc(sizeof(Tablecell)); 3747 c->cellid = cellid; 3748 c->lay = nil; 3749 c->rowspan = rowspan; 3750 c->colspan = colspan; 3751 c->align = align; 3752 c->flags = flags; 3753 c->wspec = wspec; 3754 c->hspec = hspec; 3755 c->background = bg; 3756 c->next = link; 3757 return c; 3758 } 3759 3760 static Anchor* 3761 newanchor(int index, Rune* name, Rune* href, int target, Anchor* link) 3762 { 3763 Anchor* a; 3764 3765 a = (Anchor*)emalloc(sizeof(Anchor)); 3766 a->index = index; 3767 a->name = name; 3768 a->href = href; 3769 a->target = target; 3770 a->next = link; 3771 return a; 3772 } 3773 3774 static DestAnchor* 3775 newdestanchor(int index, Rune* name, Item* item, DestAnchor* link) 3776 { 3777 DestAnchor* d; 3778 3779 d = (DestAnchor*)emalloc(sizeof(DestAnchor)); 3780 d->index = index; 3781 d->name = name; 3782 d->item = item; 3783 d->next = link; 3784 return d; 3785 } 3786 3787 static SEvent* 3788 newscriptevent(int type, Rune* script, SEvent* link) 3789 { 3790 SEvent* ans; 3791 3792 ans = (SEvent*)emalloc(sizeof(SEvent)); 3793 ans->type = type; 3794 ans->script = script; 3795 ans->next = link; 3796 return ans; 3797 } 3798 3799 static void 3800 freescriptevents(SEvent* ehead) 3801 { 3802 SEvent* e; 3803 SEvent* nexte; 3804 3805 e = ehead; 3806 while(e != nil) { 3807 nexte = e->next; 3808 free(e->script); 3809 free(e); 3810 e = nexte; 3811 } 3812 } 3813 3814 static Dimen 3815 makedimen(int kind, int spec) 3816 { 3817 Dimen d; 3818 3819 if(spec&Dkindmask) { 3820 if(warn) 3821 fprint(2, "warning: dimension spec too big: %d\n", spec); 3822 spec = 0; 3823 } 3824 d.kindspec = kind|spec; 3825 return d; 3826 } 3827 3828 int 3829 dimenkind(Dimen d) 3830 { 3831 return (d.kindspec&Dkindmask); 3832 } 3833 3834 int 3835 dimenspec(Dimen d) 3836 { 3837 return (d.kindspec&Dspecmask); 3838 } 3839 3840 static Kidinfo* 3841 newkidinfo(int isframeset, Kidinfo* link) 3842 { 3843 Kidinfo* ki; 3844 3845 ki = (Kidinfo*)emalloc(sizeof(Kidinfo)); 3846 ki->isframeset = isframeset; 3847 if(!isframeset) { 3848 ki->flags = FRhscrollauto|FRvscrollauto; 3849 ki->marginw = FRKIDMARGIN; 3850 ki->marginh = FRKIDMARGIN; 3851 ki->framebd = 1; 3852 } 3853 ki->next = link; 3854 return ki; 3855 } 3856 3857 static Docinfo* 3858 newdocinfo(void) 3859 { 3860 Docinfo* d; 3861 3862 d = (Docinfo*)emalloc(sizeof(Docinfo)); 3863 resetdocinfo(d); 3864 return d; 3865 } 3866 3867 static void 3868 resetdocinfo(Docinfo* d) 3869 { 3870 memset(d, 0, sizeof(Docinfo)); 3871 d->background = makebackground(nil, White); 3872 d->text = Black; 3873 d->link = Blue; 3874 d->vlink = Blue; 3875 d->alink = Blue; 3876 d->target = FTself; 3877 d->chset = ISO_8859_1; 3878 d->scripttype = TextJavascript; 3879 d->frameid = -1; 3880 } 3881 3882 // Use targetmap array to keep track of name <-> targetid mapping. 3883 // Use real malloc(), and never free 3884 static void 3885 targetmapinit(void) 3886 { 3887 targetmapsize = 10; 3888 targetmap = (StringInt*)emalloc(targetmapsize*sizeof(StringInt)); 3889 memset(targetmap, 0, targetmapsize*sizeof(StringInt)); 3890 targetmap[0].key = _Strdup(L"_top"); 3891 targetmap[0].val = FTtop; 3892 targetmap[1].key = _Strdup(L"_self"); 3893 targetmap[1].val = FTself; 3894 targetmap[2].key = _Strdup(L"_parent"); 3895 targetmap[2].val = FTparent; 3896 targetmap[3].key = _Strdup(L"_blank"); 3897 targetmap[3].val = FTblank; 3898 ntargets = 4; 3899 } 3900 3901 int 3902 targetid(Rune* s) 3903 { 3904 int i; 3905 int n; 3906 3907 n = _Strlen(s); 3908 if(n == 0) 3909 return FTself; 3910 for(i = 0; i < ntargets; i++) 3911 if(_Strcmp(s, targetmap[i].key) == 0) 3912 return targetmap[i].val; 3913 if(i >= targetmapsize) { 3914 targetmapsize += 10; 3915 targetmap = (StringInt*)erealloc(targetmap, targetmapsize*sizeof(StringInt)); 3916 } 3917 targetmap[i].key = (Rune*)emalloc((n+1)*sizeof(Rune)); 3918 memmove(targetmap[i].key, s, (n+1)*sizeof(Rune)); 3919 targetmap[i].val = i; 3920 ntargets++; 3921 return i; 3922 } 3923 3924 Rune* 3925 targetname(int targid) 3926 { 3927 int i; 3928 3929 for(i = 0; i < ntargets; i++) 3930 if(targetmap[i].val == targid) 3931 return targetmap[i].key; 3932 return L"?"; 3933 } 3934 3935 // Convert HTML color spec to RGB value, returning dflt if can't. 3936 // Argument is supposed to be a valid HTML color, or "". 3937 // Return the RGB value of the color, using dflt if s 3938 // is nil or an invalid color. 3939 static int 3940 color(Rune* s, int dflt) 3941 { 3942 int v; 3943 Rune* rest; 3944 3945 if(s == nil) 3946 return dflt; 3947 if(_lookup(color_tab, NCOLORS, s, _Strlen(s), &v)) 3948 return v; 3949 if(s[0] == '#') 3950 s++; 3951 v = _Strtol(s, &rest, 16); 3952 if(*rest == 0) 3953 return v; 3954 return dflt; 3955 } 3956 3957 // Debugging 3958 3959 #define HUGEPIX 10000 3960 3961 // A "shallow" validitem, that doesn't follow next links 3962 // or descend into tables. 3963 static int 3964 validitem(Item* i) 3965 { 3966 int ok; 3967 Itext* ti; 3968 Irule* ri; 3969 Iimage* ii; 3970 Ifloat* fi; 3971 int a; 3972 3973 ok = (i->tag >= Itexttag && i->tag <= Ispacertag) && 3974 (i->next == nil || validptr(i->next)) && 3975 (i->width >= 0 && i->width < HUGEPIX) && 3976 (i->height >= 0 && i->height < HUGEPIX) && 3977 (i->ascent > -HUGEPIX && i->ascent < HUGEPIX) && 3978 (i->anchorid >= 0) && 3979 (i->genattr == nil || validptr(i->genattr)); 3980 // also, could check state for ridiculous combinations 3981 // also, could check anchorid for within-doc-range 3982 if(ok) 3983 switch(i->tag) { 3984 case Itexttag: 3985 ti = (Itext*)i; 3986 ok = validStr(ti->s) && 3987 (ti->fnt >= 0 && ti->fnt < NumStyle*NumSize) && 3988 (ti->ul == ULnone || ti->ul == ULunder || ti->ul == ULmid); 3989 break; 3990 case Iruletag: 3991 ri = (Irule*)i; 3992 ok = (validvalign(ri->align) || validhalign(ri->align)) && 3993 (ri->size >=0 && ri->size < HUGEPIX); 3994 break; 3995 case Iimagetag: 3996 ii = (Iimage*)i; 3997 ok = (ii->imsrc == nil || validptr(ii->imsrc)) && 3998 (ii->width >= 0 && ii->width < HUGEPIX) && 3999 (ii->height >= 0 && ii->height < HUGEPIX) && 4000 (ii->imwidth >= 0 && ii->imwidth < HUGEPIX) && 4001 (ii->imheight >= 0 && ii->imheight < HUGEPIX) && 4002 (ii->altrep == nil || validStr(ii->altrep)) && 4003 (ii->map == nil || validptr(ii->map)) && 4004 (validvalign(ii->align) || validhalign(ii->align)) && 4005 (ii->nextimage == nil || validptr(ii->nextimage)); 4006 break; 4007 case Iformfieldtag: 4008 ok = validformfield(((Iformfield*)i)->formfield); 4009 break; 4010 case Itabletag: 4011 ok = validptr((Itable*)i); 4012 break; 4013 case Ifloattag: 4014 fi = (Ifloat*)i; 4015 ok = (fi->side == ALleft || fi->side == ALright) && 4016 validitem(fi->item) && 4017 (fi->item->tag == Iimagetag || fi->item->tag == Itabletag); 4018 break; 4019 case Ispacertag: 4020 a = ((Ispacer*)i)->spkind; 4021 ok = a==ISPnull || a==ISPvline || a==ISPhspace || a==ISPgeneral; 4022 break; 4023 default: 4024 ok = 0; 4025 } 4026 return ok; 4027 } 4028 4029 // "deep" validation, that checks whole list of items, 4030 // and descends into tables and floated tables. 4031 // nil is ok for argument. 4032 int 4033 validitems(Item* i) 4034 { 4035 int ok; 4036 Item* ii; 4037 4038 ok = 1; 4039 while(i != nil && ok) { 4040 ok = validitem(i); 4041 if(ok) { 4042 if(i->tag == Itabletag) { 4043 ok = validtable(((Itable*)i)->table); 4044 } 4045 else if(i->tag == Ifloattag) { 4046 ii = ((Ifloat*)i)->item; 4047 if(ii->tag == Itabletag) 4048 ok = validtable(((Itable*)ii)->table); 4049 } 4050 } 4051 if(!ok) { 4052 fprint(2, "invalid item: %I\n", i); 4053 } 4054 i = i->next; 4055 } 4056 return ok; 4057 } 4058 4059 static int 4060 validformfield(Formfield* f) 4061 { 4062 int ok; 4063 4064 ok = (f->next == nil || validptr(f->next)) && 4065 (f->ftype >= 0 && f->ftype <= Ftextarea) && 4066 f->fieldid >= 0 && 4067 (f->form == nil || validptr(f->form)) && 4068 (f->name == nil || validStr(f->name)) && 4069 (f->value == nil || validStr(f->value)) && 4070 (f->options == nil || validptr(f->options)) && 4071 (f->image == nil || validitem(f->image)) && 4072 (f->events == nil || validptr(f->events)); 4073 // when all built, should have f->fieldid < f->form->nfields, 4074 // but this may be called during build... 4075 return ok; 4076 } 4077 4078 // "deep" validation -- checks cell contents too 4079 static int 4080 validtable(Table* t) 4081 { 4082 int ok; 4083 int i, j; 4084 Tablecell* c; 4085 4086 ok = (t->next == nil || validptr(t->next)) && 4087 t->nrow >= 0 && 4088 t->ncol >= 0 && 4089 t->ncell >= 0 && 4090 validalign(t->align) && 4091 validdimen(t->width) && 4092 (t->border >= 0 && t->border < HUGEPIX) && 4093 (t->cellspacing >= 0 && t->cellspacing < HUGEPIX) && 4094 (t->cellpadding >= 0 && t->cellpadding < HUGEPIX) && 4095 validitems(t->caption) && 4096 (t->caption_place == ALtop || t->caption_place == ALbottom) && 4097 (t->totw >= 0 && t->totw < HUGEPIX) && 4098 (t->toth >= 0 && t->toth < HUGEPIX) && 4099 (t->tabletok == nil || validptr(t->tabletok)); 4100 // during parsing, t->rows has list; 4101 // only when parsing is done is t->nrow set > 0 4102 if(ok && t->nrow > 0 && t->ncol > 0) { 4103 // table is "finished" 4104 for(i = 0; i < t->nrow && ok; i++) 4105 ok = validtablerow(t->rows+i); 4106 for(j = 0; j < t->ncol && ok; j++) 4107 ok = validtablecol(t->cols+j); 4108 for(c = t->cells; c != nil && ok; c = c->next) 4109 ok = validtablecell(c); 4110 for(i = 0; i < t->nrow && ok; i++) 4111 for(j = 0; j < t->ncol && ok; j++) 4112 ok = validptr(t->grid[i][j]); 4113 } 4114 return ok; 4115 } 4116 4117 static int 4118 validvalign(int a) 4119 { 4120 return a == ALnone || a == ALmiddle || a == ALbottom || a == ALtop || a == ALbaseline; 4121 } 4122 4123 static int 4124 validhalign(int a) 4125 { 4126 return a == ALnone || a == ALleft || a == ALcenter || a == ALright || 4127 a == ALjustify || a == ALchar; 4128 } 4129 4130 static int 4131 validalign(Align a) 4132 { 4133 return validhalign(a.halign) && validvalign(a.valign); 4134 } 4135 4136 static int 4137 validdimen(Dimen d) 4138 { 4139 int ok; 4140 int s; 4141 4142 ok = 0; 4143 s = d.kindspec&Dspecmask; 4144 switch(d.kindspec&Dkindmask) { 4145 case Dnone: 4146 ok = s==0; 4147 break; 4148 case Dpixels: 4149 ok = s < HUGEPIX; 4150 break; 4151 case Dpercent: 4152 case Drelative: 4153 ok = 1; 4154 break; 4155 } 4156 return ok; 4157 } 4158 4159 static int 4160 validtablerow(Tablerow* r) 4161 { 4162 return (r->cells == nil || validptr(r->cells)) && 4163 (r->height >= 0 && r->height < HUGEPIX) && 4164 (r->ascent > -HUGEPIX && r->ascent < HUGEPIX) && 4165 validalign(r->align); 4166 } 4167 4168 static int 4169 validtablecol(Tablecol* c) 4170 { 4171 return c->width >= 0 && c->width < HUGEPIX 4172 && validalign(c->align); 4173 } 4174 4175 static int 4176 validtablecell(Tablecell* c) 4177 { 4178 int ok; 4179 4180 ok = (c->next == nil || validptr(c->next)) && 4181 (c->nextinrow == nil || validptr(c->nextinrow)) && 4182 (c->content == nil || validptr(c->content)) && 4183 (c->lay == nil || validptr(c->lay)) && 4184 c->rowspan >= 0 && 4185 c->colspan >= 0 && 4186 validalign(c->align) && 4187 validdimen(c->wspec) && 4188 c->row >= 0 && 4189 c->col >= 0; 4190 if(ok) { 4191 if(c->content != nil) 4192 ok = validitems(c->content); 4193 } 4194 return ok; 4195 } 4196 4197 static int 4198 validptr(void* p) 4199 { 4200 // TODO: a better job of this. 4201 // For now, just dereference, which cause a bomb 4202 // if not valid 4203 static char c; 4204 4205 c = *((char*)p); 4206 return 1; 4207 } 4208 4209 static int 4210 validStr(Rune* s) 4211 { 4212 return s != nil && validptr(s); 4213 } 4214