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/*
* HTMLparser.h : interface for an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#ifndef __HTML_PARSER_H__
#define __HTML_PARSER_H__
#include <libxml/parser.h>
#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.
*/
const htmlElemDesc * htmlTagLookup (const xmlChar *tag);
const htmlEntityDesc * htmlEntityLookup(const xmlChar *name);
const htmlEntityDesc * htmlEntityValueLookup(unsigned int value);
int htmlIsAutoClosed(htmlDocPtr doc,
htmlNodePtr elem);
int htmlAutoCloseTag(htmlDocPtr doc,
const xmlChar *name,
htmlNodePtr elem);
const htmlEntityDesc * htmlParseEntityRef(htmlParserCtxtPtr ctxt,
xmlChar **str);
int htmlParseCharRef(htmlParserCtxtPtr ctxt);
void htmlParseElement(htmlParserCtxtPtr ctxt);
int htmlParseDocument(htmlParserCtxtPtr ctxt);
htmlDocPtr htmlSAXParseDoc (xmlChar *cur,
const char *encoding,
htmlSAXHandlerPtr sax,
void *userData);
htmlDocPtr htmlParseDoc (xmlChar *cur,
const char *encoding);
htmlDocPtr htmlSAXParseFile(const char *filename,
const char *encoding,
htmlSAXHandlerPtr sax,
void *userData);
htmlDocPtr htmlParseFile (const char *filename,
const char *encoding);
int UTF8ToHtml (unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen);
int htmlEncodeEntities(unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen, int quoteChar);
int htmlIsScriptAttribute(const xmlChar *name);
int htmlHandleOmittedElem(int val);
/**
* Interfaces for the Push mode.
*/
void htmlFreeParserCtxt (htmlParserCtxtPtr ctxt);
htmlParserCtxtPtr htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax,
void *user_data,
const char *chunk,
int size,
const char *filename,
xmlCharEncoding enc);
int htmlParseChunk (htmlParserCtxtPtr ctxt,
const char *chunk,
int size,
int terminate);
/* NRK/Jan2003: further knowledge of HTML structure
*/
typedef enum {
HTML_NA = 0 , /* something we don't check at all */
HTML_INVALID = 0x1 ,
HTML_DEPRECATED = 0x2 ,
HTML_VALID = 0x4 ,
HTML_REQUIRED = 0xc /* VALID bit set so ( & HTML_VALID ) is TRUE */
} htmlStatus ;
/* Using htmlElemDesc rather than name here, to emphasise the fact
that otherwise there's a lookup overhead
*/
htmlStatus htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ;
int htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ;
htmlStatus htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ;
htmlStatus htmlNodeStatus(const htmlNodePtr, int) ;
#define htmlDefaultSubelement(elt) elt->defaultsubelt
#define htmlElementAllowedHereDesc(parent,elt) \
htmlElementAllowedHere((parent), (elt)->name)
#define htmlRequiredAttrs(elt) (elt)->attrs_req
#ifdef __cplusplus
}
#endif
#endif /* __HTML_PARSER_H__ */
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