HTMLparser.h
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上传日期:2022-06-27
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浏览器
开发平台:
Visual C++
- /*
- * 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 (xmlChar *cur,
- const char *encoding,
- htmlSAXHandlerPtr sax,
- void *userData);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlParseDoc (xmlChar *cur,
- const char *encoding);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlSAXParseFile(const char *filename,
- const char *encoding,
- htmlSAXHandlerPtr sax,
- void *userData);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlParseFile (const char *filename,
- const char *encoding);
- XMLPUBFUN int XMLCALL
- UTF8ToHtml (unsigned char *out,
- int *outlen,
- const unsigned char *in,
- int *inlen);
- XMLPUBFUN int XMLCALL
- htmlEncodeEntities(unsigned char *out,
- int *outlen,
- const unsigned char *in,
- int *inlen, int quoteChar);
- XMLPUBFUN int XMLCALL
- htmlIsScriptAttribute(const xmlChar *name);
- XMLPUBFUN int XMLCALL
- htmlHandleOmittedElem(int val);
- #ifdef LIBXML_PUSH_ENABLED
- /**
- * Interfaces for the Push mode.
- */
- XMLPUBFUN htmlParserCtxtPtr XMLCALL
- htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax,
- void *user_data,
- const char *chunk,
- int size,
- const char *filename,
- xmlCharEncoding enc);
- XMLPUBFUN int XMLCALL
- htmlParseChunk (htmlParserCtxtPtr ctxt,
- const char *chunk,
- int size,
- int terminate);
- #endif /* LIBXML_PUSH_ENABLED */
- XMLPUBFUN void XMLCALL
- 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_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_COMPACT = 1<<16 /* compact small text nodes */
- } htmlParserOption;
- XMLPUBFUN void XMLCALL
- htmlCtxtReset (htmlParserCtxtPtr ctxt);
- XMLPUBFUN int XMLCALL
- htmlCtxtUseOptions (htmlParserCtxtPtr ctxt,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlReadDoc (const xmlChar *cur,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlReadFile (const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlReadMemory (const char *buffer,
- int size,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlReadFd (int fd,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlReadIO (xmlInputReadCallback ioread,
- xmlInputCloseCallback ioclose,
- void *ioctx,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlCtxtReadDoc (xmlParserCtxtPtr ctxt,
- const xmlChar *cur,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlCtxtReadFile (xmlParserCtxtPtr ctxt,
- const char *filename,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlCtxtReadMemory (xmlParserCtxtPtr ctxt,
- const char *buffer,
- int size,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- htmlCtxtReadFd (xmlParserCtxtPtr ctxt,
- int fd,
- const char *URL,
- const char *encoding,
- int options);
- XMLPUBFUN htmlDocPtr XMLCALL
- 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 XMLCALL htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ;
- XMLPUBFUN int XMLCALL htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ;
- XMLPUBFUN htmlStatus XMLCALL htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ;
- XMLPUBFUN htmlStatus XMLCALL htmlNodeStatus(const 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__ */