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/*
* $LynxId: HTMLDTD.c,v 1.57 2010/09/25 00:30:56 tom Exp $
*
* Our Static DTD for HTML
* -----------------------
*/
/* Implements:
*/
#include <HTUtils.h>
#include <HTMLDTD.h>
#include <LYLeaks.h>
#include <LYJustify.h>
/*
* Character entities like   now excluded from our DTD tables, they are
* mapped to Unicode and handled by chartrans code directly the similar way the
* numeric entities like { does. See src/chrtrans/entities.h for real
* mapping.
*/
/* Entity Names
* ------------
*
* This table must be matched exactly with ALL the translation tables
* (this is an obsolete translation mechanism, probably unused,
* currently replaced with Unicode chartrans in most cases...)
*/
static const char *entities[] =
{
"AElig", /* capital AE diphthong (ligature) */
"Aacute", /* capital A, acute accent */
"Acirc", /* capital A, circumflex accent */
"Agrave", /* capital A, grave accent */
"Aring", /* capital A, ring */
"Atilde", /* capital A, tilde */
"Auml", /* capital A, dieresis or umlaut mark */
"Ccedil", /* capital C, cedilla */
"Dstrok", /* capital Eth, Icelandic */
"ETH", /* capital Eth, Icelandic */
"Eacute", /* capital E, acute accent */
"Ecirc", /* capital E, circumflex accent */
"Egrave", /* capital E, grave accent */
"Euml", /* capital E, dieresis or umlaut mark */
"Iacute", /* capital I, acute accent */
"Icirc", /* capital I, circumflex accent */
"Igrave", /* capital I, grave accent */
"Iuml", /* capital I, dieresis or umlaut mark */
"Ntilde", /* capital N, tilde */
"Oacute", /* capital O, acute accent */
"Ocirc", /* capital O, circumflex accent */
"Ograve", /* capital O, grave accent */
"Oslash", /* capital O, slash */
"Otilde", /* capital O, tilde */
"Ouml", /* capital O, dieresis or umlaut mark */
"THORN", /* capital THORN, Icelandic */
"Uacute", /* capital U, acute accent */
"Ucirc", /* capital U, circumflex accent */
"Ugrave", /* capital U, grave accent */
"Uuml", /* capital U, dieresis or umlaut mark */
"Yacute", /* capital Y, acute accent */
"aacute", /* small a, acute accent */
"acirc", /* small a, circumflex accent */
"acute", /* spacing acute */
"aelig", /* small ae diphthong (ligature) */
"agrave", /* small a, grave accent */
"amp", /* ampersand */
"aring", /* small a, ring */
"atilde", /* small a, tilde */
"auml", /* small a, dieresis or umlaut mark */
"brkbar", /* broken vertical bar */
"brvbar", /* broken vertical bar */
"ccedil", /* small c, cedilla */
"cedil", /* spacing cedilla */
"cent", /* cent sign */
"copy", /* copyright sign */
"curren", /* currency sign */
"deg", /* degree sign */
"die", /* spacing dieresis */
"divide", /* division sign */
"eacute", /* small e, acute accent */
"ecirc", /* small e, circumflex accent */
"egrave", /* small e, grave accent */
"emdash", /* dash the width of emsp */
"emsp", /* em space - not collapsed */
"endash", /* dash the width of ensp */
"ensp", /* en space - not collapsed */
"eth", /* small eth, Icelandic */
"euml", /* small e, dieresis or umlaut mark */
"frac12", /* fraction 1/2 */
"frac14", /* fraction 1/4 */
"frac34", /* fraction 3/4 */
"gt", /* greater than */
"hibar", /* spacing macron */
"iacute", /* small i, acute accent */
"icirc", /* small i, circumflex accent */
"iexcl", /* inverted exclamation mark */
"igrave", /* small i, grave accent */
"iquest", /* inverted question mark */
"iuml", /* small i, dieresis or umlaut mark */
"laquo", /* angle quotation mark, left */
"lt", /* less than */
"macr", /* spacing macron */
"mdash", /* dash the width of emsp */
"micro", /* micro sign */
"middot", /* middle dot */
"nbsp", /* non breaking space */
"ndash", /* dash the width of ensp */
"not", /* negation sign */
"ntilde", /* small n, tilde */
"oacute", /* small o, acute accent */
"ocirc", /* small o, circumflex accent */
"ograve", /* small o, grave accent */
"ordf", /* feminine ordinal indicator */
"ordm", /* masculine ordinal indicator */
"oslash", /* small o, slash */
"otilde", /* small o, tilde */
"ouml", /* small o, dieresis or umlaut mark */
"para", /* paragraph sign */
"plusmn", /* plus-or-minus sign */
"pound", /* pound sign */
"quot", /* quote '"' */
"raquo", /* angle quotation mark, right */
"reg", /* circled R registered sign */
"sect", /* section sign */
"shy", /* soft hyphen */
"sup1", /* superscript 1 */
"sup2", /* superscript 2 */
"sup3", /* superscript 3 */
"szlig", /* small sharp s, German (sz ligature) */
"thinsp", /* thin space (not collapsed) */
"thorn", /* small thorn, Icelandic */
"times", /* multiplication sign */
"trade", /* trade mark sign (U+2122) */
"uacute", /* small u, acute accent */
"ucirc", /* small u, circumflex accent */
"ugrave", /* small u, grave accent */
"uml", /* spacing dieresis */
"uuml", /* small u, dieresis or umlaut mark */
"yacute", /* small y, acute accent */
"yen", /* yen sign */
"yuml", /* small y, dieresis or umlaut mark */
};
/* Attribute Lists
* ---------------
*
* Lists must be in alphabetical order by attribute name
* The tag elements contain the number of attributes
*/
/* From Peter Flynn's intro to the HTML Pro DTD:
%structure;
DIV, CENTER, H1 to H6, P, UL, OL, DL, DIR, MENU, PRE, XMP, LISTING, BLOCKQUOTE, BQ,
2 1 2 2 1 8 8 8 8 8 8 8 8 4 4
MULTICOL,?NOBR, FORM, TABLE, ADDRESS, FIG, BDO, NOTE, and FN; plus?WBR, LI, and LH
8 n ?1 n 8 8 2 2 2 2 2 ?1 nE 4 4
%insertions;
Elements which usually contain special-purpose material, or no text material at all.
BASEFONT, APPLET, OBJECT, EMBED, SCRIPT, MAP, MARQUEE, HR, ISINDEX, BGSOUND, TAB,?IMG,
1 e? 2 2 l 1 e 2 l 8 4 4 E 1? E 1 E ! E ?1 E
IMAGE, BR, plus NOEMBED, SERVER, SPACER, AUDIOSCOPE, and SIDEBAR; ?area
1 n 1 E n n n n n 8 E
%text;
Elements within the %structure; which directly contain running text.
Descriptive or analytic markup: EM, STRONG, DFN, CODE, SAMP, KBD, VAR, CITE, Q, LANG, AU,
2 2 2 2 2 2 2 2 2 2 n 2
AUTHOR, PERSON, ACRONYM, ABBR, INS, DEL, and SPAN
2 2 n 2 2 2 2 2
Visual markup:S, STRIKE, I, B, TT, U,?NOBR,?WBR, BR, BIG, SMALL, FONT, STYLE, BLINK, TAB,
1 1 1 1 1 1 ?1 n ?1nE? 1 E 1 1 1 1 l 1 1 E?
BLACKFACE, LIMITTEXT, NOSMARTQUOTES, and SHADOW
1 n 1 n 1 n 1 n
Hypertext and graphics: A and?IMG
8 ?8 E
Mathematical: SUB, SUP, and MATH
4 4 4 l
Documentary: COMMENT, ENTITY, ELEMENT, and ATTRIB
4 4 n 4 n 4 n
%formula;
*/
/* Elements
* --------
*
* Must match definitions in HTMLDTD.html!
* Must be in alphabetical order.
*
* The T_* extra info is listed here, even though most fields are not used
* in SGML.c if Old_DTD is set (with the exception of some Tgf_* flags).
* This simplifies comparison of the tags_table0[] table (otherwise unchanged
* from original Lynx treatment) with the tags_table1[] table below. - kw
*
* Name*, Attributes, No. of attributes, content, extra info...
*/
#include <src0_HTMLDTD.h>
#include <src1_HTMLDTD.h>
/* Dummy space, will be filled with the contents of either tags_table1
or tags_table0 on calling HTSwitchDTD - kw */
static HTTag tags[HTML_ALL_ELEMENTS];
const SGML_dtd HTML_dtd =
{
tags,
HTML_ELEMENTS,
entities, /* probably unused */
TABLESIZE(entities),
};
/* This function fills the "tags" part of the HTML_dtd structure with
what we want to use, either tags_table0 or tags_table1. Note that it
has to be called at least once before HTML_dtd is used, otherwise
the HTML_dtd contents will be invalid! This could be coded in a way
that would make an initialisation call unnecessary, but my C knowledge
is limited and I didn't want to list the whole tags_table1 table
twice... - kw */
void HTSwitchDTD(int new_flag)
{
if (TRACE)
CTRACE((tfp,
"HTMLDTD: Copying %s DTD element info of size %d, %d * %d\n",
new_flag ? "strict" : "tagsoup",
(int) (new_flag ? sizeof(tags_table1) : sizeof(tags_table0)),
HTML_ALL_ELEMENTS,
(int) sizeof(HTTag)));
if (new_flag)
MemCpy(tags, tags_table1, HTML_ALL_ELEMENTS * sizeof(HTTag));
else
MemCpy(tags, tags_table0, HTML_ALL_ELEMENTS * sizeof(HTTag));
}
HTTag HTTag_unrecognized =
{NULL_HTTag, NULL, 0, 0, SGML_EMPTY, T__UNREC_};
/*
* Utility Routine: Useful for people building HTML objects.
*/
/* Start anchor element
* --------------------
*
* It is kinda convenient to have a particulr routine for
* starting an anchor element, as everything else for HTML is
* simple anyway.
*/
struct _HTStructured {
HTStructuredClass *isa;
/* ... */
};
void HTStartAnchor(HTStructured * obj, const char *name,
const char *href)
{
BOOL present[HTML_A_ATTRIBUTES];
const char *value[HTML_A_ATTRIBUTES];
int i;
for (i = 0; i < HTML_A_ATTRIBUTES; i++)
present[i] = NO;
if (name && *name) {
present[HTML_A_NAME] = YES;
value[HTML_A_NAME] = (const char *) name;
}
if (href) {
present[HTML_A_HREF] = YES;
value[HTML_A_HREF] = (const char *) href;
}
(*obj->isa->start_element) (obj, HTML_A, present, value, -1, 0);
}
void HTStartAnchor5(HTStructured * obj, const char *name,
const char *href,
const char *linktype,
int tag_charset)
{
BOOL present[HTML_A_ATTRIBUTES];
const char *value[HTML_A_ATTRIBUTES];
int i;
for (i = 0; i < HTML_A_ATTRIBUTES; i++)
present[i] = NO;
if (name && *name) {
present[HTML_A_NAME] = YES;
value[HTML_A_NAME] = name;
}
if (href && *href) {
present[HTML_A_HREF] = YES;
value[HTML_A_HREF] = href;
}
if (linktype && *linktype) {
present[HTML_A_TYPE] = YES;
value[HTML_A_TYPE] = linktype;
}
(*obj->isa->start_element) (obj, HTML_A, present, value, tag_charset, 0);
}
void HTStartIsIndex(HTStructured * obj, const char *prompt,
const char *href)
{
BOOL present[HTML_ISINDEX_ATTRIBUTES];
const char *value[HTML_ISINDEX_ATTRIBUTES];
int i;
for (i = 0; i < HTML_ISINDEX_ATTRIBUTES; i++)
present[i] = NO;
if (prompt && *prompt) {
present[HTML_ISINDEX_PROMPT] = YES;
value[HTML_ISINDEX_PROMPT] = (const char *) prompt;
}
if (href) {
present[HTML_ISINDEX_HREF] = YES;
value[HTML_ISINDEX_HREF] = (const char *) href;
}
(*obj->isa->start_element) (obj, HTML_ISINDEX, present, value, -1, 0);
}
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