Annotation of libwww/Library/src/HTML.c, revision 1.2
1.2 ! timbl 1: /* Structured stream to Rich hypertext converter
! 2: ** ============================================
1.1 timbl 3: **
1.2 ! timbl 4: ** This generates of a hypertext object. It converts from the
! 5: ** structured stream interface fro HTMl events into the style-
! 6: ** oriented iunterface of the HText.h interface. This module is
! 7: ** only used in clients and shouldnot be linked into servers.
1.1 timbl 8: **
1.2 ! timbl 9: ** Override this module is making a new GUI browser.
1.1 timbl 10: **
11: */
12: #include "HTML.h"
13:
1.2 ! timbl 14: #define CAREFUL /* Check nesting here notreally necessary */
! 15:
1.1 timbl 16: #include <ctype.h>
17: #include <stdio.h>
18:
19: #include "HTAtom.h"
20: #include "HTChunk.h"
21: #include "HText.h"
22: #include "HTStyle.h"
23:
24:
25: extern HTStyleSheet * styleSheet; /* Application-wide */
26:
27: /* Module-wide style cache
28: */
29: PRIVATE int got_styles = 0;
1.2 ! timbl 30: PRIVATE HTStyle *styles[HTML_ELEMENTS];
! 31: PRIVATE HTStyle *default_style;
1.1 timbl 32:
33:
34: /* HTML Object
35: ** -----------
36: */
1.2 ! timbl 37: #define MAX_NESTING 20 /* Should be checked by parser */
! 38:
! 39: typedef struct _stack_element {
! 40: HTStyle * style;
! 41: int tag_number;
! 42: } stack_element;
! 43:
! 44: struct _HTStructured {
! 45: CONST HTStructuredClass * isa;
! 46: HTParentAnchor * node_anchor;
! 47: HText * text;
! 48:
! 49: HTStream* target; /* Output stream */
! 50: HTStreamClass targetClass; /* Output routines */
! 51:
! 52: HTChunk title; /* Grow by 128 */
! 53:
! 54: char * comment_start; /* for literate programming */
! 55: char * comment_end;
! 56:
! 57: HTTag * current_tag;
! 58: BOOL style_change;
! 59: HTStyle * new_style;
! 60: HTStyle * old_style;
! 61: BOOL in_word; /* Have just had a non-white char */
! 62: stack_element stack[MAX_NESTING];
! 63: stack_element *sp; /* Style stack pointer */
1.1 timbl 64: };
65:
1.2 ! timbl 66: struct _HTStream {
! 67: CONST HTStreamClass * isa;
! 68: /* .... */
! 69: };
1.1 timbl 70:
71: /* Forward declarations of routines
72: */
73: PRIVATE void get_styles NOPARAMS;
74:
75:
1.2 ! timbl 76: PRIVATE void actually_set_style PARAMS((HTStructured * this));
! 77: PRIVATE void change_style PARAMS((HTStructured * this, HTStyle * style));
1.1 timbl 78:
79: /* Style buffering avoids dummy paragraph begin/ends.
80: */
1.2 ! timbl 81: #define UPDATE_STYLE if (this->style_change) { actually_set_style(this); }
1.1 timbl 82:
83:
1.2 ! timbl 84: #ifdef OLD_CODE
1.1 timbl 85: /* The following accented characters are from peter Flynn, curia project */
86:
87: /* these ifdefs don't solve the problem of a simple terminal emulator
88: ** with a different character set to the client machine. But nothing does,
89: ** except looking at the TERM setting */
90:
1.2 ! timbl 91:
1.1 timbl 92: { "ocus" , "&" }, /* for CURIA */
93: #ifdef IBMPC
94: { "aacute" , "\240" }, /* For PC display */
95: { "eacute" , "\202" },
96: { "iacute" , "\241" },
97: { "oacute" , "\242" },
98: { "uacute" , "\243" },
99: { "Aacute" , "\101" },
100: { "Eacute" , "\220" },
101: { "Iacute" , "\111" },
102: { "Oacute" , "\117" },
103: { "Uacute" , "\125" },
104: #else
105: { "aacute" , "\341" }, /* Works for openwindows -- Peter Flynn */
106: { "eacute" , "\351" },
107: { "iacute" , "\355" },
108: { "oacute" , "\363" },
109: { "uacute" , "\372" },
110: { "Aacute" , "\301" },
111: { "Eacute" , "\310" },
112: { "Iacute" , "\315" },
113: { "Oacute" , "\323" },
114: { "Uacute" , "\332" },
115: #endif
116: { 0, 0 } /* Terminate list */
117: };
1.2 ! timbl 118: #endif
1.1 timbl 119:
120:
1.2 ! timbl 121: /* Entity values -- for ISO Latin 1 local representation
! 122: **
! 123: ** This MUST match exactly the table referred to in the DTD!
! 124: */
! 125: static char * ISO_Latin1[] = {
! 126: "\306", /* capital AE diphthong (ligature) */
! 127: "\301", /* capital A, acute accent */
! 128: "\302", /* capital A, circumflex accent */
! 129: "\300", /* capital A, grave accent */
! 130: "\305", /* capital A, ring */
! 131: "\303", /* capital A, tilde */
! 132: "\304", /* capital A, dieresis or umlaut mark */
! 133: "\307", /* capital C, cedilla */
! 134: "\320", /* capital Eth, Icelandic */
! 135: "\311", /* capital E, acute accent */
! 136: "\312", /* capital E, circumflex accent */
! 137: "\310", /* capital E, grave accent */
! 138: "\313", /* capital E, dieresis or umlaut mark */
! 139: "\315", /* capital I, acute accent */
! 140: "\316", /* capital I, circumflex accent */
! 141: "\314", /* capital I, grave accent */
! 142: "\317", /* capital I, dieresis or umlaut mark */
! 143: "\321", /* capital N, tilde */
! 144: "\323", /* capital O, acute accent */
! 145: "\324", /* capital O, circumflex accent */
! 146: "\322", /* capital O, grave accent */
! 147: "\330", /* capital O, slash */
! 148: "\325", /* capital O, tilde */
! 149: "\326", /* capital O, dieresis or umlaut mark */
! 150: "\336", /* capital THORN, Icelandic */
! 151: "\332", /* capital U, acute accent */
! 152: "\333", /* capital U, circumflex accent */
! 153: "\331", /* capital U, grave accent */
! 154: "\334", /* capital U, dieresis or umlaut mark */
! 155: "\335", /* capital Y, acute accent */
! 156: "\341", /* small a, acute accent */
! 157: "\342", /* small a, circumflex accent */
! 158: "\346", /* small ae diphthong (ligature) */
! 159: "\340", /* small a, grave accent */
! 160: "\046", /* ampersand */
! 161: "\345", /* small a, ring */
! 162: "\343", /* small a, tilde */
! 163: "\344", /* small a, dieresis or umlaut mark */
! 164: "\347", /* small c, cedilla */
! 165: "\351", /* small e, acute accent */
! 166: "\352", /* small e, circumflex accent */
! 167: "\350", /* small e, grave accent */
! 168: "\360", /* small eth, Icelandic */
! 169: "\353", /* small e, dieresis or umlaut mark */
! 170: "\076", /* greater than */
! 171: "\355", /* small i, acute accent */
! 172: "\356", /* small i, circumflex accent */
! 173: "\354", /* small i, grave accent */
! 174: "\357", /* small i, dieresis or umlaut mark */
! 175: "\074", /* less than */
! 176: "\361", /* small n, tilde */
! 177: "\363", /* small o, acute accent */
! 178: "\364", /* small o, circumflex accent */
! 179: "\362", /* small o, grave accent */
! 180: "\370", /* small o, slash */
! 181: "\365", /* small o, tilde */
! 182: "\366", /* small o, dieresis or umlaut mark */
! 183: "\337", /* small sharp s, German (sz ligature) */
! 184: "\376", /* small thorn, Icelandic */
! 185: "\372", /* small u, acute accent */
! 186: "\373", /* small u, circumflex accent */
! 187: "\371", /* small u, grave accent */
! 188: "\374", /* small u, dieresis or umlaut mark */
! 189: "\375", /* small y, acute accent */
! 190: "\377", /* small y, dieresis or umlaut mark */
1.1 timbl 191: };
192:
1.2 ! timbl 193:
! 194: /* Entity values -- for NeXT local representation
! 195: **
! 196: ** This MUST match exactly the table referred to in the DTD!
! 197: **
! 198: */
! 199: static char * NeXTCharacters[] = {
! 200: "\341", /* capital AE diphthong (ligature) */
! 201: "\202", /* capital A, acute accent */
! 202: "\203", /* capital A, circumflex accent */
! 203: "\201", /* capital A, grave accent */
! 204: "\206", /* capital A, ring */
! 205: "\204", /* capital A, tilde */
! 206: "\205", /* capital A, dieresis or umlaut mark */
! 207: "\207", /* capital C, cedilla */
! 208: "\220", /* capital Eth, Icelandic */
! 209: "\211", /* capital E, acute accent */
! 210: "\212", /* capital E, circumflex accent */
! 211: "\210", /* capital E, grave accent */
! 212: "\213", /* capital E, dieresis or umlaut mark */
! 213: "\215", /* capital I, acute accent */
! 214: "\216", /* capital I, circumflex accent these are */
! 215: "\214", /* capital I, grave accent ISO -100 hex */
! 216: "\217", /* capital I, dieresis or umlaut mark */
! 217: "\221", /* capital N, tilde */
! 218: "\223", /* capital O, acute accent */
! 219: "\224", /* capital O, circumflex accent */
! 220: "\222", /* capital O, grave accent */
! 221: "\351", /* capital O, slash 'cept this */
! 222: "\225", /* capital O, tilde */
! 223: "\226", /* capital O, dieresis or umlaut mark */
! 224: "\234", /* capital THORN, Icelandic */
! 225: "\230", /* capital U, acute accent */
! 226: "\231", /* capital U, circumflex accent */
! 227: "\227", /* capital U, grave accent */
! 228: "\232", /* capital U, dieresis or umlaut mark */
! 229: "\233", /* capital Y, acute accent */
! 230: "\326", /* small a, acute accent */
! 231: "\327", /* small a, circumflex accent */
! 232: "\361", /* small ae diphthong (ligature) */
! 233: "\325", /* small a, grave accent */
! 234: "\046", /* ampersand */
! 235: "\332", /* small a, ring */
! 236: "\330", /* small a, tilde */
! 237: "\331", /* small a, dieresis or umlaut mark */
! 238: "\333", /* small c, cedilla */
! 239: "\335", /* small e, acute accent */
! 240: "\336", /* small e, circumflex accent */
! 241: "\334", /* small e, grave accent */
! 242: "\346", /* small eth, Icelandic */
! 243: "\337", /* small e, dieresis or umlaut mark */
! 244: "\076", /* greater than */
! 245: "\342", /* small i, acute accent */
! 246: "\344", /* small i, circumflex accent */
! 247: "\340", /* small i, grave accent */
! 248: "\345", /* small i, dieresis or umlaut mark */
! 249: "\074", /* less than */
! 250: "\347", /* small n, tilde */
! 251: "\355", /* small o, acute accent */
! 252: "\356", /* small o, circumflex accent */
! 253: "\354", /* small o, grave accent */
! 254: "\371", /* small o, slash */
! 255: "\357", /* small o, tilde */
! 256: "\360", /* small o, dieresis or umlaut mark */
! 257: "\373", /* small sharp s, German (sz ligature) */
! 258: "\374", /* small thorn, Icelandic */
! 259: "\363", /* small u, acute accent */
! 260: "\364", /* small u, circumflex accent */
! 261: "\362", /* small u, grave accent */
! 262: "\366", /* small u, dieresis or umlaut mark */
! 263: "\367", /* small y, acute accent */
! 264: "\375", /* small y, dieresis or umlaut mark */
1.1 timbl 265: };
266:
1.2 ! timbl 267: /* Entity values -- for IBM/PC Code Page 850 (International)
! 268: **
! 269: ** This MUST match exactly the table referred to in the DTD!
! 270: **
! 271: */
! 272: /* @@@@@@@@@@@@@@@@@ TBD */
! 273:
! 274:
! 275:
! 276: /* Set character set
! 277: ** ----------------
! 278: */
! 279:
! 280: PRIVATE char** p_entity_values = ISO_Latin1; /* Pointer to translation */
1.1 timbl 281:
1.2 ! timbl 282: PUBLIC void HTMLUseCharacterSet ARGS1(HTMLCharacterSet, i)
! 283: {
! 284: p_entity_values = (i == HTML_NEXT_CHARS) ? NeXTCharacters
! 285: : ISO_Latin1;
! 286: }
1.1 timbl 287:
288:
289: /* Flattening the style structure
290: ** ------------------------------
291: **
292: On the NeXT, and on any read-only browser, it is simpler for the text to have
293: a sequence of styles, rather than a nested tree of styles. In this
294: case we have to flatten the structure as it arrives from SGML tags into
295: a sequence of styles.
296: */
297:
298: /* If style really needs to be set, call this
299: */
1.2 ! timbl 300: PRIVATE void actually_set_style ARGS1(HTStructured *, this)
1.1 timbl 301: {
1.2 ! timbl 302: if (!this->text) { /* First time through */
! 303: this->text = HText_new2(this->node_anchor, this->target);
! 304: HText_beginAppend(this->text);
! 305: HText_setStyle(this->text, this->new_style);
! 306: this->in_word = NO;
1.1 timbl 307: } else {
1.2 ! timbl 308: HText_setStyle(this->text, this->new_style);
1.1 timbl 309: }
1.2 ! timbl 310: this->old_style = this->new_style;
! 311: this->style_change = NO;
1.1 timbl 312: }
313:
314: /* If you THINK you need to change style, call this
315: */
316:
1.2 ! timbl 317: PRIVATE void change_style ARGS2(HTStructured *, this, HTStyle *,style)
1.1 timbl 318: {
1.2 ! timbl 319: if (this->new_style!=style) {
! 320: this->style_change = YES;
! 321: this->new_style = style;
1.1 timbl 322: }
323: }
324:
1.2 ! timbl 325: /*_________________________________________________________________________
! 326: **
! 327: ** A C T I O N R O U T I N E S
! 328: */
! 329:
! 330: /* Character handling
! 331: ** ------------------
1.1 timbl 332: */
1.2 ! timbl 333: PRIVATE void HTML_put_character ARGS2(HTStructured *, this, char, c)
1.1 timbl 334: {
1.2 ! timbl 335:
! 336: switch (this->sp[0].tag_number) {
! 337: case HTML_COMMENT:
! 338: break; /* Do Nothing */
! 339:
! 340: case HTML_TITLE:
! 341: HTChunkPutc(&this->title, c);
! 342: break;
! 343:
! 344:
! 345: case HTML_LISTING: /* Litteral text */
! 346: case HTML_XMP:
! 347: case HTML_PLAINTEXT:
! 348: case HTML_PRE:
! 349: /* We guarrantee that the style is up-to-date in begin_litteral
! 350: */
! 351: HText_appendCharacter(this->text, c);
! 352: break;
! 353:
! 354: default: /* Free format text */
! 355: if (this->style_change) {
! 356: if ((c=='\n') || (c==' ')) return; /* Ignore it */
! 357: UPDATE_STYLE;
! 358: }
! 359: if (c=='\n') {
! 360: if (this->in_word) {
! 361: HText_appendCharacter(this->text, ' ');
! 362: this->in_word = NO;
! 363: }
! 364: } else {
! 365: HText_appendCharacter(this->text, c);
! 366: this->in_word = YES;
! 367: }
! 368: } /* end switch */
1.1 timbl 369: }
370:
1.2 ! timbl 371:
! 372:
! 373: /* String handling
! 374: ** ---------------
! 375: **
! 376: ** This is written separately from put_character becuase the loop can
! 377: ** in some cases be postponed to a lower level for speed.
! 378: */
! 379: PRIVATE void HTML_put_string ARGS2(HTStructured *, this, CONST char*, s)
1.1 timbl 380: {
1.2 ! timbl 381:
! 382: switch (this->sp[0].tag_number) {
! 383: case HTML_COMMENT:
! 384: break; /* Do Nothing */
! 385:
! 386: case HTML_TITLE:
! 387: HTChunkPuts(&this->title, s);
! 388: break;
! 389:
! 390:
! 391: case HTML_LISTING: /* Litteral text */
! 392: case HTML_XMP:
! 393: case HTML_PLAINTEXT:
! 394: case HTML_PRE:
! 395:
! 396: /* We guarrantee that the style is up-to-date in begin_litteral
! 397: */
! 398: HText_appendText(this->text, s);
! 399: break;
! 400:
! 401: default: /* Free format text */
! 402: {
! 403: CONST char *p = s;
! 404: if (this->style_change) {
! 405: for (; *p && ((*p=='\n') || (*p==' ')); p++) ; /* Ignore leaders */
! 406: if (!*p) return;
! 407: UPDATE_STYLE;
! 408: }
! 409: for(; *p; p++) {
! 410: if (this->style_change) {
! 411: if ((*p=='\n') || (*p==' ')) continue; /* Ignore it */
! 412: UPDATE_STYLE;
! 413: }
! 414: if (*p=='\n') {
! 415: if (this->in_word) {
! 416: HText_appendCharacter(this->text, ' ');
! 417: this->in_word = NO;
! 418: }
! 419: } else {
! 420: HText_appendCharacter(this->text, *p);
! 421: this->in_word = YES;
! 422: }
! 423: } /* for */
! 424: }
! 425: } /* end switch */
1.1 timbl 426: }
427:
428:
1.2 ! timbl 429: /* Buffer write
! 430: **
1.1 timbl 431: */
1.2 ! timbl 432: PRIVATE void HTML_write ARGS3(HTStructured *, this, CONST char*, s, int, l)
1.1 timbl 433: {
1.2 ! timbl 434: CONST char* p;
! 435: CONST char* e = s+l;
! 436: for (p=s; s<e; p++) HTML_put_character(this, *p);
1.1 timbl 437: }
1.2 ! timbl 438:
! 439:
! 440: /* Start Element
! 441: ** -------------
! 442: */
! 443: PRIVATE void HTML_start_element ARGS4(
! 444: HTStructured *, this,
! 445: int, element_number,
! 446: BOOL*, present,
! 447: char **, value)
! 448: {
! 449: switch (element_number) {
! 450: case HTML_A:
! 451: {
! 452: HTChildAnchor * source = HTAnchor_findChildAndLink(
! 453: this->node_anchor, /* parent */
! 454: present[HTML_A_NAME] ? value[HTML_A_NAME] : 0, /* Tag */
! 455: present[HTML_A_HREF] ? value[HTML_A_HREF] : 0, /* Addresss */
! 456: present[HTML_A_TYPE] && value[HTML_A_TYPE] ?
! 457: (HTLinkType*)HTAtom_for(value[HTML_A_TYPE])
! 458: : 0);
! 459:
! 460: if (present[HTML_A_TITLE] && value[HTML_A_TITLE]) {
! 461: HTParentAnchor * dest =
! 462: HTAnchor_parent(
! 463: HTAnchor_followMainLink((HTAnchor*)source)
! 464: );
! 465: if (!HTAnchor_title(dest))
! 466: HTAnchor_setTitle(dest, value[HTML_A_TITLE]);
! 467: }
! 468: UPDATE_STYLE;
! 469: HText_beginAnchor(this->text, source);
! 470: }
! 471: break;
! 472:
! 473: case HTML_TITLE:
! 474: HTChunkClear(&this->title);
! 475: break;
! 476:
! 477: case HTML_NEXTID:
! 478: /* if (present[NEXTID_N] && value[NEXTID_N])
! 479: HText_setNextId(this->text, atoi(value[NEXTID_N])); */
! 480: break;
! 481:
! 482: case HTML_ISINDEX:
! 483: HTAnchor_setIndex(this->node_anchor);
! 484: break;
! 485:
! 486: case HTML_P:
! 487: UPDATE_STYLE;
! 488: HText_appendParagraph(this->text);
! 489: this->in_word = NO;
! 490: break;
! 491:
! 492: case HTML_DL:
! 493: change_style(this, present[DL_COMPACT]
! 494: ? styles[HTML_DLC]
! 495: : styles[HTML_DL]);
! 496: this->in_word = NO;
! 497: break;
! 498:
! 499: case HTML_DT:
! 500: if (!this->style_change) {
! 501: HText_appendParagraph(this->text);
! 502: this->in_word = NO;
! 503: }
! 504: break;
! 505:
! 506: case HTML_DD:
! 507: UPDATE_STYLE;
! 508: HTML_put_character(this, '\t'); /* Just tab out one stop */
! 509: this->in_word = NO;
! 510:
! 511: case HTML_UL:
! 512: case HTML_OL:
! 513: case HTML_MENU:
! 514: case HTML_DIR:
! 515: change_style(this, styles[element_number]);
! 516: this->in_word = NO;
! 517: break;
! 518:
! 519: case HTML_LI:
! 520: UPDATE_STYLE;
! 521: if (this->sp[1].tag_number != HTML_DIR)
! 522: HText_appendParagraph(this->text);
! 523: else
! 524: HText_appendCharacter(this->text, '\t'); /* Tab @@ nl for UL? */
! 525: this->in_word = NO;
! 526: break;
! 527:
! 528: case HTML_LISTING: /* Litteral text */
! 529: case HTML_XMP:
! 530: case HTML_PLAINTEXT:
! 531: case HTML_PRE:
! 532: change_style(this, styles[element_number]);
! 533: UPDATE_STYLE;
! 534: if (this->comment_end)
! 535: HText_appendText(this->text, this->comment_end);
! 536: break;
! 537:
! 538: default:
! 539: change_style(this, styles[element_number]); /* May be postponed */
! 540: break;
! 541:
! 542: } /* end switch */
! 543:
! 544: if (HTML_dtd.tags[element_number].contents!= SGML_EMPTY) {
! 545: --(this->sp);
! 546: this->sp[0].style = this->new_style; /* Stack new style */
! 547: this->sp[0].tag_number = element_number;
! 548: }
! 549:
1.1 timbl 550: }
1.2 ! timbl 551:
1.1 timbl 552: /* End Element
1.2 ! timbl 553: ** -----------
1.1 timbl 554: **
1.2 ! timbl 555: */
! 556: /* When we end an element, the style must be returned to that
1.1 timbl 557: ** in effect before that element. Note that anchors (etc?)
558: ** don't have an associated style, so that we must scan down the
559: ** stack for an element with a defined style. (In fact, the styles
560: ** should be linked to the whole stack not just the top one.)
561: ** TBL 921119
562: */
1.2 ! timbl 563: PRIVATE void HTML_end_element ARGS2(HTStructured *, this, int , element_number)
1.1 timbl 564: {
1.2 ! timbl 565: #ifdef CAREFUL /* parser assumed to produce good nesting */
! 566: if (element_number != this->sp[0].tag_number) {
! 567: fprintf(stderr, "HTMLText: end of element %s when expecting end of %s\n",
! 568: HTML_dtd.tags[element_number].name,
! 569: HTML_dtd.tags[this->sp->tag_number].name);
! 570: exit(-20);
1.1 timbl 571: }
1.2 ! timbl 572: #endif
! 573:
! 574: this->sp++; /* Pop state off stack */
! 575:
! 576: switch(element_number) {
! 577:
! 578: case HTML_A:
! 579: UPDATE_STYLE;
! 580: HText_endAnchor(this->text);
! 581: break;
! 582:
! 583: case HTML_TITLE:
! 584: HTChunkTerminate(&this->title);
! 585: HTAnchor_setTitle(this->node_anchor, this->title.data);
! 586: break;
! 587:
! 588: case HTML_LISTING: /* Litteral text */
! 589: case HTML_XMP:
! 590: case HTML_PLAINTEXT:
! 591: case HTML_PRE:
! 592: if (this->comment_start)
! 593: HText_appendText(this->text, this->comment_start);
! 594: /* Fall through */
! 595:
! 596: default:
! 597:
! 598: change_style(this, this->sp->style); /* Often won't really change */
! 599: this->in_word = NO; /* Paragraph styles only @@ */
! 600: break;
! 601:
! 602: } /* switch */
1.1 timbl 603: }
604:
1.2 ! timbl 605:
! 606: /* Expanding entities
! 607: ** ------------------
! 608: */
! 609: /* (In fact, they all shrink!)
1.1 timbl 610: */
1.2 ! timbl 611:
! 612: PRIVATE void HTML_put_entity ARGS2(HTStructured *, this, int, entity_number)
1.1 timbl 613: {
1.2 ! timbl 614: HTML_put_string(this, ISO_Latin1[entity_number]); /* @@ Other representations */
1.1 timbl 615: }
616:
1.2 ! timbl 617:
! 618:
! 619: /* Free an HTML object
! 620: ** -------------------
! 621: **
! 622: ** If non-interactive, everything is freed off.
! 623: ** Otherwise, the interactive object is left.
! 624: */
! 625: PUBLIC void HTML_free ARGS1(HTStructured *, this)
1.1 timbl 626: {
1.2 ! timbl 627: if (this->target) {
! 628: (*this->targetClass.free)(this->target);
! 629: HText_free(this->text);
! 630: }
! 631: free(this);
1.1 timbl 632: }
633:
634:
1.2 ! timbl 635: PRIVATE void HTML_end_document ARGS1(HTStructured *, this)
1.1 timbl 636:
1.2 ! timbl 637: /* If the document is empty, the text object will not yet exist.
! 638: So we could in fact abandon creating the document and return
! 639: an error code. In fact an empty document is an important type
! 640: of document, so we don't.
! 641: */
1.1 timbl 642: {
1.2 ! timbl 643: UPDATE_STYLE; /* Creates empty document here! */
! 644: if (this->comment_end)
! 645: HTML_put_string(this,this->comment_end);
! 646: HText_endAppend(this->text);
! 647: if (this->target)
! 648: (*this->targetClass.end_document)(this->target);
1.1 timbl 649: }
650:
1.2 ! timbl 651:
! 652: /* Get Styles from style sheet
! 653: ** ---------------------------
! 654: */
! 655: PRIVATE void get_styles NOARGS
1.1 timbl 656: {
1.2 ! timbl 657: got_styles = YES;
! 658:
! 659: default_style = HTStyleNamed(styleSheet, "Normal");
1.1 timbl 660:
1.2 ! timbl 661: styles[HTML_H1] = HTStyleNamed(styleSheet, "Heading1");
! 662: styles[HTML_H2] = HTStyleNamed(styleSheet, "Heading2");
! 663: styles[HTML_H3] = HTStyleNamed(styleSheet, "Heading3");
! 664: styles[HTML_H4] = HTStyleNamed(styleSheet, "Heading4");
! 665: styles[HTML_H5] = HTStyleNamed(styleSheet, "Heading5");
! 666: styles[HTML_H6] = HTStyleNamed(styleSheet, "Heading6");
! 667: styles[HTML_H7] = HTStyleNamed(styleSheet, "Heading7");
! 668:
! 669: styles[HTML_DL] = HTStyleNamed(styleSheet, "Glossary");
! 670: styles[HTML_UL] =
! 671: styles[HTML_OL] = HTStyleNamed(styleSheet, "List");
! 672: styles[HTML_MENU] = HTStyleNamed(styleSheet, "Menu");
! 673: styles[HTML_DIR] = HTStyleNamed(styleSheet, "Dir");
! 674: styles[HTML_DLC] = HTStyleNamed(styleSheet, "GlossaryCompact");
! 675: styles[HTML_ADDRESS]= HTStyleNamed(styleSheet, "Address");
! 676: styles[HTML_BLOCKQUOTE]= HTStyleNamed(styleSheet, "BlockQuote");
! 677: styles[HTML_PLAINTEXT] =
! 678: styles[HTML_XMP] = HTStyleNamed(styleSheet, "Example");
! 679: styles[HTML_PRE] = HTStyleNamed(styleSheet, "Preformatted");
! 680: styles[HTML_LISTING] = HTStyleNamed(styleSheet, "Listing");
! 681: }
! 682: /* P U B L I C
! 683: */
! 684:
! 685: /* Structured Object Class
! 686: ** -----------------------
! 687: */
! 688: PUBLIC CONST HTStructuredClass HTMLPresentation = /* As opposed to print etc */
! 689: {
! 690: "text/html",
! 691: HTML_free,
! 692: HTML_end_document,
! 693: HTML_put_character, HTML_put_string, HTML_write,
! 694: HTML_start_element, HTML_end_element,
! 695: HTML_put_entity
! 696: };
1.1 timbl 697:
1.2 ! timbl 698: /* New Structured Text object
! 699: ** --------------------------
! 700: **
! 701: ** If the stream is NULL then an interactive object is produced
1.1 timbl 702: */
1.2 ! timbl 703: PUBLIC HTStructured* HTML_new ARGS2(
! 704: HTParentAnchor *, anchor,
! 705: HTStream*, stream)
1.1 timbl 706: {
707:
1.2 ! timbl 708: HTStructured * this = malloc(sizeof(*this));
1.1 timbl 709:
710: if (!got_styles) get_styles();
711:
1.2 ! timbl 712: this->isa = &HTMLPresentation;
! 713: this->node_anchor = anchor;
1.1 timbl 714: this->title.size = 0;
715: this->title.growby = 128;
716: this->title.allocated = 0;
717: this->title.data = 0;
718: this->text = 0;
719: this->style_change = YES; /* Force check leading to text creation */
1.2 ! timbl 720: this->new_style = default_style;
! 721: this->old_style = 0;
! 722: this->sp = this->stack + MAX_NESTING - 1;
! 723: this->sp->tag_number = -1; /* INVALID */
! 724: this->sp->style = default_style; /* INVALID */
1.1 timbl 725:
1.2 ! timbl 726: this->comment_start = NULL;
! 727: this->comment_end = NULL;
! 728: this->target = stream;
! 729: if (stream) this->targetClass = *stream->isa; /* Copy pointers */
1.1 timbl 730:
1.2 ! timbl 731: return (HTStructured*) this;
1.1 timbl 732: }
733:
734:
1.2 ! timbl 735: /* HTConverter for HTML to plain text
! 736: ** ----------------------------------
1.1 timbl 737: **
1.2 ! timbl 738: ** This will convert from HTML to presentation or plain text.
1.1 timbl 739: */
1.2 ! timbl 740: PUBLIC HTStream* HTMLToPlain ARGS3(
! 741: HTPresentation *, pres,
! 742: HTParentAnchor *, anchor,
! 743: HTStream *, sink)
1.1 timbl 744: {
1.2 ! timbl 745: return SGML_new(&HTML_dtd, HTML_new(anchor, sink));
1.1 timbl 746: }
747:
748:
1.2 ! timbl 749: /* HTConverter for HTML to C code
! 750: ** ------------------------------
! 751: **
! 752: ** C copde is like plain text but all non-preformatted code
! 753: ** is commented out.
! 754: ** This will convert from HTML to presentation or plain text.
! 755: */
! 756: PUBLIC HTStream* HTMLToC ARGS3(
! 757: HTPresentation *, pres,
! 758: HTParentAnchor *, anchor,
! 759: HTStream *, sink)
1.1 timbl 760: {
1.2 ! timbl 761: HTStructured * html = HTML_new(anchor, sink);
! 762: html->comment_start = "/* ";
! 763: html->comment_end = " */\n"; /* Must start in col 1 for cpp */
! 764: HTML_put_string(html,html->comment_start);
! 765: return SGML_new(&HTML_dtd, html);
1.1 timbl 766: }
767:
768:
1.2 ! timbl 769: /* Presenter for HTML
! 770: ** ------------------
! 771: **
! 772: ** This will convert from HTML to presentation or plain text.
! 773: **
! 774: ** Override this if you have a windows version
1.1 timbl 775: */
1.2 ! timbl 776: #ifndef GUI
! 777: PUBLIC HTStream* HTMLPresent ARGS3(
! 778: HTPresentation *, pres,
! 779: HTParentAnchor *, anchor,
! 780: HTStream *, sink)
1.1 timbl 781: {
1.2 ! timbl 782: return SGML_new(&HTML_dtd, HTML_new(anchor, NULL));
1.1 timbl 783: }
1.2 ! timbl 784: #endif
1.1 timbl 785:
786:
1.2 ! timbl 787: /* Record error message as a hypertext object
! 788: ** ------------------------------------------
! 789: **
! 790: ** The error message should be marked as an error so that
! 791: ** it can be reloaded later.
! 792: ** This implementation just throws up an error message
! 793: ** and leaves the document unloaded.
1.1 timbl 794: **
1.2 ! timbl 795: ** On entry,
! 796: ** sink is a stream to the output device if any
! 797: ** number is the HTTP error number
! 798: ** message is the human readable message.
1.1 timbl 799: */
1.2 ! timbl 800:
! 801: PUBLIC int HTLoadError ARGS3(
! 802: HTStream *, sink,
! 803: int, number,
! 804: CONST char *, message)
! 805: {
! 806: HTAlert(message); /* @@@@@@@@@@@@@@@@@@@ */
! 807: return -number;
! 808: }
! 809:
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