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/**
* @file
*
* @brief HTML parser, doesn't support HTML5
*
* This module orginally implemented an HTML parser based on the
* (underspecified) HTML 4.0 spec. As of 2.14, the tokenizer
* conforms to HTML5. Tree construction still follows a custom,
* unspecified algorithm with many differences to HTML5.
*
* The parser defaults to ISO-8859-1, the default encoding of
* HTTP/1.0.
*
* @copyright 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
/*
* Backward compatibility
*/
#define UTF8ToHtml htmlUTF8ToHtml
#define htmlDefaultSubelement(elt) elt->defaultsubelt
#define htmlElementAllowedHereDesc(parent,elt) \
htmlElementAllowedHere((parent), (elt)->name)
#define htmlRequiredAttrs(elt) (elt)->attrs_req
/*
* Most of the back-end structures from XML and HTML are shared.
*/
/** Same as xmlParserCtxt */
typedef xmlParserCtxt htmlParserCtxt;
typedef xmlParserCtxtPtr htmlParserCtxtPtr;
typedef xmlParserNodeInfo htmlParserNodeInfo;
/** Same as xmlSAXHandler */
typedef xmlSAXHandler htmlSAXHandler;
typedef xmlSAXHandlerPtr htmlSAXHandlerPtr;
/** Same as xmlParserInput */
typedef xmlParserInput htmlParserInput;
typedef xmlParserInputPtr htmlParserInputPtr;
typedef xmlDocPtr htmlDocPtr;
typedef xmlNodePtr htmlNodePtr;
/** @cond ignore */
/*
* 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; /* unused */
char endTag; /* Whether the end tag can be implied */
char saveEndTag; /* unused */
char empty; /* Is this an empty element ? */
char depr; /* unused */
char dtd; /* unused */
char isinline; /* is this a block 0 or inline 1 element */
const char *desc; /* the description */
const char** subelts XML_DEPRECATED_MEMBER;
const char* defaultsubelt XML_DEPRECATED_MEMBER;
const char** attrs_opt XML_DEPRECATED_MEMBER;
const char** attrs_depr XML_DEPRECATED_MEMBER;
const char** attrs_req XML_DEPRECATED_MEMBER;
int dataMode;
};
/*
* 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
/**
* @deprecated Use #xmlSAX2InitHtmlDefaultSAXHandler
*/
XML_DEPRECATED
XMLPUBVAR const xmlSAXHandlerV1 htmlDefaultSAXHandler;
#endif /* LIBXML_SAX1_ENABLED */
/** @endcond */
/*
* There is only few public functions.
*/
XML_DEPRECATED
XMLPUBFUN void
htmlInitAutoClose (void);
XML_DEPRECATED
XMLPUBFUN const htmlElemDesc *
htmlTagLookup (const xmlChar *tag);
XML_DEPRECATED
XMLPUBFUN const htmlEntityDesc *
htmlEntityLookup(const xmlChar *name);
XML_DEPRECATED
XMLPUBFUN const htmlEntityDesc *
htmlEntityValueLookup(unsigned int value);
XML_DEPRECATED
XMLPUBFUN int
htmlIsAutoClosed(xmlDoc *doc,
xmlNode *elem);
XML_DEPRECATED
XMLPUBFUN int
htmlAutoCloseTag(xmlDoc *doc,
const xmlChar *name,
xmlNode *elem);
XML_DEPRECATED
XMLPUBFUN const htmlEntityDesc *
htmlParseEntityRef(htmlParserCtxt *ctxt,
const xmlChar **str);
XML_DEPRECATED
XMLPUBFUN int
htmlParseCharRef(htmlParserCtxt *ctxt);
XML_DEPRECATED
XMLPUBFUN void
htmlParseElement(htmlParserCtxt *ctxt);
XMLPUBFUN htmlParserCtxt *
htmlNewParserCtxt(void);
XMLPUBFUN htmlParserCtxt *
htmlNewSAXParserCtxt(const htmlSAXHandler *sax,
void *userData);
XMLPUBFUN htmlParserCtxt *
htmlCreateMemoryParserCtxt(const char *buffer,
int size);
XMLPUBFUN int
htmlParseDocument(htmlParserCtxt *ctxt);
XML_DEPRECATED
XMLPUBFUN xmlDoc *
htmlSAXParseDoc (const xmlChar *cur,
const char *encoding,
htmlSAXHandler *sax,
void *userData);
XMLPUBFUN xmlDoc *
htmlParseDoc (const xmlChar *cur,
const char *encoding);
XMLPUBFUN htmlParserCtxt *
htmlCreateFileParserCtxt(const char *filename,
const char *encoding);
XML_DEPRECATED
XMLPUBFUN xmlDoc *
htmlSAXParseFile(const char *filename,
const char *encoding,
htmlSAXHandler *sax,
void *userData);
XMLPUBFUN xmlDoc *
htmlParseFile (const char *filename,
const char *encoding);
XML_DEPRECATED
XMLPUBFUN int
htmlUTF8ToHtml (unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen);
XML_DEPRECATED
XMLPUBFUN int
htmlEncodeEntities(unsigned char *out,
int *outlen,
const unsigned char *in,
int *inlen, int quoteChar);
XML_DEPRECATED
XMLPUBFUN int
htmlIsScriptAttribute(const xmlChar *name);
XML_DEPRECATED
XMLPUBFUN int
htmlHandleOmittedElem(int val);
#ifdef LIBXML_PUSH_ENABLED
/*
* Interfaces for the Push mode.
*/
XMLPUBFUN htmlParserCtxt *
htmlCreatePushParserCtxt(htmlSAXHandler *sax,
void *user_data,
const char *chunk,
int size,
const char *filename,
xmlCharEncoding enc);
XMLPUBFUN int
htmlParseChunk (htmlParserCtxt *ctxt,
const char *chunk,
int size,
int terminate);
#endif /* LIBXML_PUSH_ENABLED */
XMLPUBFUN void
htmlFreeParserCtxt (htmlParserCtxt *ctxt);
/*
* New set of simpler/more flexible APIs
*/
/**
* This is the set of HTML parser options that can be passed to
* #htmlReadDoc, #htmlCtxtSetOptions and other functions.
*/
typedef enum {
/**
* No effect as of 2.14.0.
*/
HTML_PARSE_RECOVER = 1<<0,
/**
* Do not default to a doctype if none was found.
*/
HTML_PARSE_NODEFDTD = 1<<2,
/**
* Disable error and warning reports to the error handlers.
* Errors are still accessible with xmlCtxtGetLastError().
*/
HTML_PARSE_NOERROR = 1<<5,
/**
* Disable warning reports.
*/
HTML_PARSE_NOWARNING = 1<<6,
/**
* No effect.
*/
HTML_PARSE_PEDANTIC = 1<<7,
/**
* Remove some text nodes containing only whitespace from the
* result document. Which nodes are removed depends on a conservative
* heuristic. The reindenting feature of the serialization code relies
* on this option to be set when parsing. Use of this option is
* DISCOURAGED.
*/
HTML_PARSE_NOBLANKS = 1<<8,
/**
* No effect.
*/
HTML_PARSE_NONET = 1<<11,
/**
* Do not add implied html, head or body elements.
*/
HTML_PARSE_NOIMPLIED = 1<<13,
/**
* Store small strings directly in the node struct to save
* memory.
*/
HTML_PARSE_COMPACT = 1<<16,
/**
* Relax some internal limits. See XML_PARSE_HUGE in xmlParserOption.
*
* @since 2.14.0
*
* Use XML_PARSE_HUGE with older versions.
*/
HTML_PARSE_HUGE = 1<<19,
/**
* Ignore the encoding in the HTML declaration. This option is
* mostly unneeded these days. The only effect is to enforce
* ISO-8859-1 decoding of ASCII-like data.
*/
HTML_PARSE_IGNORE_ENC =1<<21,
/**
* Enable reporting of line numbers larger than 65535.
*
* @since 2.14.0
*
* Use XML_PARSE_BIG_LINES with older versions.
*/
HTML_PARSE_BIG_LINES = 1<<22,
/**
* Make the tokenizer emit a SAX callback for each token. This results
* in unbalanced invocations of startElement and endElement.
*
* For now, this is only usable to tokenize HTML5 with custom SAX
* callbacks. A tree builder isn't implemented yet.
*
* @since 2.14.0
*/
HTML_PARSE_HTML5 = 1<<26
} htmlParserOption;
XMLPUBFUN void
htmlCtxtReset (htmlParserCtxt *ctxt);
XMLPUBFUN int
htmlCtxtSetOptions (htmlParserCtxt *ctxt,
int options);
XMLPUBFUN int
htmlCtxtUseOptions (htmlParserCtxt *ctxt,
int options);
XMLPUBFUN xmlDoc *
htmlReadDoc (const xmlChar *cur,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlReadFile (const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlReadMemory (const char *buffer,
int size,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlReadFd (int fd,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlReadIO (xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose,
void *ioctx,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlCtxtParseDocument (htmlParserCtxt *ctxt,
xmlParserInput *input);
XMLPUBFUN xmlDoc *
htmlCtxtReadDoc (xmlParserCtxt *ctxt,
const xmlChar *cur,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlCtxtReadFile (xmlParserCtxt *ctxt,
const char *filename,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlCtxtReadMemory (xmlParserCtxt *ctxt,
const char *buffer,
int size,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlCtxtReadFd (xmlParserCtxt *ctxt,
int fd,
const char *URL,
const char *encoding,
int options);
XMLPUBFUN xmlDoc *
htmlCtxtReadIO (xmlParserCtxt *ctxt,
xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose,
void *ioctx,
const char *URL,
const char *encoding,
int options);
/**
* deprecated content model
*/
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
*/
XML_DEPRECATED
XMLPUBFUN htmlStatus htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ;
XML_DEPRECATED
XMLPUBFUN int htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ;
XML_DEPRECATED
XMLPUBFUN htmlStatus htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ;
XML_DEPRECATED
XMLPUBFUN htmlStatus htmlNodeStatus(xmlNode *, int) ;
#ifdef __cplusplus
}
#endif
#endif /* LIBXML_HTML_ENABLED */
#endif /* __HTML_PARSER_H__ */