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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 */
};
#ifdef LIBXML_SAX1_ENABLED
XML_DEPRECATED
XMLPUBVAR const xmlSAXHandlerV1 htmlDefaultSAXHandler;
#ifdef LIBXML_THREAD_ENABLED
XML_DEPRECATED
XMLPUBFUN const xmlSAXHandlerV1 *__htmlDefaultSAXHandler(void);
#endif
#endif /* LIBXML_SAX1_ENABLED */
/*
* There is only few public functions.
*/
XML_DEPRECATED
XMLPUBFUN void
htmlInitAutoClose (void);
XMLPUBFUN const htmlElemDesc *
htmlTagLookup (const xmlChar *tag);
XMLPUBFUN const htmlEntityDesc *
htmlEntityLookup(const xmlChar *name);
XMLPUBFUN const htmlEntityDesc *
htmlEntityValueLookup(unsigned int value);
XMLPUBFUN int
htmlIsAutoClosed(htmlDocPtr doc,
htmlNodePtr elem);
XMLPUBFUN int
htmlAutoCloseTag(htmlDocPtr doc,
const xmlChar *name,
htmlNodePtr elem);
XML_DEPRECATED
XMLPUBFUN const htmlEntityDesc *
htmlParseEntityRef(htmlParserCtxtPtr ctxt,
const xmlChar **str);
XML_DEPRECATED
XMLPUBFUN int
htmlParseCharRef(htmlParserCtxtPtr ctxt);
XML_DEPRECATED
XMLPUBFUN void
htmlParseElement(htmlParserCtxtPtr ctxt);
XMLPUBFUN htmlParserCtxtPtr
htmlNewParserCtxt(void);
XMLPUBFUN htmlParserCtxtPtr
htmlNewSAXParserCtxt(const htmlSAXHandler *sax,
void *userData);
XMLPUBFUN htmlParserCtxtPtr
htmlCreateMemoryParserCtxt(const char *buffer,
int size);
XMLPUBFUN int
htmlParseDocument(htmlParserCtxtPtr ctxt);
XML_DEPRECATED
XMLPUBFUN htmlDocPtr
htmlSAXParseDoc (const xmlChar *cur,
const char *encoding,
htmlSAXHandlerPtr sax,
void *userData);
XMLPUBFUN htmlDocPtr
htmlParseDoc (const xmlChar *cur,
const char *encoding);
XMLPUBFUN htmlParserCtxtPtr
htmlCreateFileParserCtxt(const char *filename,
const char *encoding);
XML_DEPRECATED
XMLPUBFUN htmlDocPtr
htmlSAXParseFile(const char *filename,
const char *encoding,
htmlSAXHandlerPtr sax,
void *userData);
XMLPUBFUN htmlDocPtr
htmlParseFile (const char *filename,
const char *encoding);
XMLPUBFUN int
UTF8ToHtml (unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen);
XMLPUBFUN int
htmlEncodeEntities(unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen, int quoteChar);
XMLPUBFUN int
htmlIsScriptAttribute(const xmlChar *name);
XML_DEPRECATED
XMLPUBFUN int
htmlHandleOmittedElem(int val);
#ifdef LIBXML_PUSH_ENABLED
/**
* Interfaces for the Push mode.
*/
XMLPUBFUN htmlParserCtxtPtr
htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax,
void *user_data,
const char *chunk,
int size,
const char *filename,
xmlCharEncoding enc);
XMLPUBFUN int
htmlParseChunk (htmlParserCtxtPtr ctxt,
const char *chunk,
int size,
int terminate);
#endif /* LIBXML_PUSH_ENABLED */
XMLPUBFUN void
htmlFreeParserCtxt (htmlParserCtxtPtr ctxt);
/*
* New set of simpler/more flexible APIs
*/
/**
* xmlParserOption:
*
* This is the set of XML parser options that can be passed down
* to the xmlReadDoc() and similar calls.
*/
typedef enum {
HTML_PARSE_RECOVER = 1<<0, /* Relaxed parsing */
HTML_PARSE_NODEFDTD = 1<<2, /* do not default a doctype if not found */
HTML_PARSE_NOERROR = 1<<5, /* suppress error reports */
HTML_PARSE_NOWARNING= 1<<6, /* suppress warning reports */
HTML_PARSE_PEDANTIC = 1<<7, /* pedantic error reporting */
HTML_PARSE_NOBLANKS = 1<<8, /* remove blank nodes */
HTML_PARSE_NONET = 1<<11,/* Forbid network access */
HTML_PARSE_NOIMPLIED= 1<<13,/* Do not add implied html/body... elements */
HTML_PARSE_COMPACT = 1<<16,/* compact small text nodes */
HTML_PARSE_IGNORE_ENC=1<<21 /* ignore internal document encoding hint */
} htmlParserOption;
XMLPUBFUN void
htmlCtxtReset (htmlParserCtxtPtr ctxt);
XMLPUBFUN int
htmlCtxtUseOptions (htmlParserCtxtPtr ctxt,
int options);
XMLPUBFUN htmlDocPtr
htmlReadDoc (const xmlChar *cur,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlReadFile (const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlReadMemory (const char *buffer,
int size,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlReadFd (int fd,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlReadIO (xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose,
void *ioctx,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlCtxtParseDocument (htmlParserCtxtPtr ctxt,
xmlParserInputPtr input);
XMLPUBFUN htmlDocPtr
htmlCtxtReadDoc (xmlParserCtxtPtr ctxt,
const xmlChar *cur,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlCtxtReadFile (xmlParserCtxtPtr ctxt,
const char *filename,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlCtxtReadMemory (xmlParserCtxtPtr ctxt,
const char *buffer,
int size,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlCtxtReadFd (xmlParserCtxtPtr ctxt,
int fd,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN htmlDocPtr
htmlCtxtReadIO (xmlParserCtxtPtr ctxt,
xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose,
void *ioctx,
const char *URL,
const char *encoding,
int options);
/* 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
*/
XMLPUBFUN htmlStatus htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ;
XMLPUBFUN int htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ;
XMLPUBFUN htmlStatus htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ;
XMLPUBFUN htmlStatus htmlNodeStatus(htmlNodePtr, int) ;
/**
* htmlDefaultSubelement:
* @elt: HTML element
*
* Returns the default subelement for this element
*/
#define htmlDefaultSubelement(elt) elt->defaultsubelt
/**
* htmlElementAllowedHereDesc:
* @parent: HTML parent element
* @elt: HTML element
*
* Checks whether an HTML element description may be a
* direct child of the specified element.
*
* Returns 1 if allowed; 0 otherwise.
*/
#define htmlElementAllowedHereDesc(parent,elt) \
htmlElementAllowedHere((parent), (elt)->name)
/**
* htmlRequiredAttrs:
* @elt: HTML element
*
* Returns the attributes required for the specified element.
*/
#define htmlRequiredAttrs(elt) (elt)->attrs_req
#ifdef __cplusplus
}
#endif
#endif /* LIBXML_HTML_ENABLED */
#endif /* __HTML_PARSER_H__ */
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