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 * Summary: interface for an HTML 4.0 non-verifying parser
 * Description: this module implements an HTML 4.0 non-verifying parser
 *              with API compatible with the XML parser ones. It should
 *              be able to parse "real world" HTML, even if severely
 *              broken from a specification point of view.
 *
 * Copy: See Copyright for the status of this software.
 *
 * Author: Daniel Veillard
 */

#ifndef __HTML_PARSER_H__
#define __HTML_PARSER_H__
#include <libxml/xmlversion.h>
#include <libxml/parser.h>

#ifdef LIBXML_HTML_ENABLED

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Most of the back-end structures from XML and HTML are shared.
 */
typedef xmlParserCtxt htmlParserCtxt;
typedef xmlParserCtxtPtr htmlParserCtxtPtr;
typedef xmlParserNodeInfo htmlParserNodeInfo;
typedef xmlSAXHandler htmlSAXHandler;
typedef xmlSAXHandlerPtr htmlSAXHandlerPtr;
typedef xmlParserInput htmlParserInput;
typedef xmlParserInputPtr htmlParserInputPtr;
typedef xmlDocPtr htmlDocPtr;
typedef xmlNodePtr htmlNodePtr;

/*
 * Internal description of an HTML element, representing HTML 4.01
 * and XHTML 1.0 (which share the same structure).
 */
typedef struct _htmlElemDesc htmlElemDesc;
typedef htmlElemDesc *htmlElemDescPtr;
struct _htmlElemDesc {
    const char *name;	/* The tag name */
    char startTag;      /* Whether the start tag can be implied */
    char endTag;        /* Whether the end tag can be implied */
    char saveEndTag;    /* Whether the end tag should be saved */
    char empty;         /* Is this an empty element ? */
    char depr;          /* Is this a deprecated element ? */
    char dtd;           /* 1: only in Loose DTD, 2: only Frameset one */
    char isinline;      /* is this a block 0 or inline 1 element */
    const char *desc;   /* the description */

/* NRK Jan.2003
 * New fields encapsulating HTML structure
 *
 * Bugs:
 *	This is a very limited representation.  It fails to tell us when
 *	an element *requires* subelements (we only have whether they're
 *	allowed or not), and it doesn't tell us where CDATA and PCDATA
 *	are allowed.  Some element relationships are not fully represented:
 *	these are flagged with the word MODIFIER
 */
    const char** subelts;		/* allowed sub-elements of this element */
    const char* defaultsubelt;	/* subelement for suggested auto-repair
					   if necessary or NULL */
    const char** attrs_opt;		/* Optional Attributes */
    const char** attrs_depr;		/* Additional deprecated attributes */
    const char** attrs_req;		/* Required attributes */
};

/*
 * Internal description of an HTML entity.
 */
typedef struct _htmlEntityDesc htmlEntityDesc;
typedef htmlEntityDesc *htmlEntityDescPtr;
struct _htmlEntityDesc {
    unsigned int value;	/* the UNICODE value for the character */
    const char *name;	/* The entity name */
    const char *desc;   /* the description */
};

/*
 * There is only few public functions.
 */
XMLPUBFUN const htmlElemDesc * XMLCALL
			htmlTagLookup	(const xmlChar *tag);
XMLPUBFUN const htmlEntityDesc * XMLCALL
			htmlEntityLookup(const xmlChar *name);
XMLPUBFUN const htmlEntityDesc * XMLCALL
			htmlEntityValueLookup(unsigned int value);

XMLPUBFUN int XMLCALL
			htmlIsAutoClosed(htmlDocPtr doc,
					 htmlNodePtr elem);
XMLPUBFUN int XMLCALL
			htmlAutoCloseTag(htmlDocPtr doc,
					 const xmlChar *name,
					 htmlNodePtr elem);
XMLPUBFUN const htmlEntityDesc * XMLCALL
			htmlParseEntityRef(htmlParserCtxtPtr ctxt,
					 const xmlChar **str);
XMLPUBFUN int XMLCALL
			htmlParseCharRef(htmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL
			htmlParseElement(htmlParserCtxtPtr ctxt);

XMLPUBFUN htmlParserCtxtPtr XMLCALL
			htmlNewParserCtxt(void);

XMLPUBFUN htmlParserCtxtPtr XMLCALL
			htmlCreateMemoryParserCtxt(const char *buffer,
						   int size);

XMLPUBFUN int XMLCALL
			htmlParseDocument(htmlParserCtxtPtr ctxt);
XMLPUBFUN htmlDocPtr XMLCALL
			htmlSAXParseDoc	(const xmlChar *cur,
					 const char *encoding,
					 htmlSAXHandlerPtr sax,
					 void *userData);
