307 lines
9.2 KiB
C
307 lines
9.2 KiB
C
/*
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* Summary: interface for an HTML 4.0 non-verifying parser
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* Description: this module implements an HTML 4.0 non-verifying parser
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* with API compatible with the XML parser ones. It should
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* be able to parse "real world" HTML, even if severely
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* broken from a specification point of view.
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*
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* Copy: See Copyright for the status of this software.
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*
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* Author: Daniel Veillard
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*/
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#ifndef __HTML_PARSER_H__
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#define __HTML_PARSER_H__
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#include <libxml/xmlversion.h>
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#include <libxml/parser.h>
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#ifdef LIBXML_HTML_ENABLED
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Most of the back-end structures from XML and HTML are shared.
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*/
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typedef xmlParserCtxt htmlParserCtxt;
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typedef xmlParserCtxtPtr htmlParserCtxtPtr;
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typedef xmlParserNodeInfo htmlParserNodeInfo;
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typedef xmlSAXHandler htmlSAXHandler;
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typedef xmlSAXHandlerPtr htmlSAXHandlerPtr;
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typedef xmlParserInput htmlParserInput;
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typedef xmlParserInputPtr htmlParserInputPtr;
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typedef xmlDocPtr htmlDocPtr;
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typedef xmlNodePtr htmlNodePtr;
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/*
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* Internal description of an HTML element, representing HTML 4.01
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* and XHTML 1.0 (which share the same structure).
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*/
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typedef struct _htmlElemDesc htmlElemDesc;
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typedef htmlElemDesc *htmlElemDescPtr;
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struct _htmlElemDesc {
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const char *name; /* The tag name */
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char startTag; /* Whether the start tag can be implied */
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char endTag; /* Whether the end tag can be implied */
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char saveEndTag; /* Whether the end tag should be saved */
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char empty; /* Is this an empty element ? */
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char depr; /* Is this a deprecated element ? */
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char dtd; /* 1: only in Loose DTD, 2: only Frameset one */
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char isinline; /* is this a block 0 or inline 1 element */
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const char *desc; /* the description */
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/* NRK Jan.2003
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* New fields encapsulating HTML structure
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*
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* Bugs:
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* This is a very limited representation. It fails to tell us when
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* an element *requires* subelements (we only have whether they're
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* allowed or not), and it doesn't tell us where CDATA and PCDATA
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* are allowed. Some element relationships are not fully represented:
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* these are flagged with the word MODIFIER
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*/
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const char** subelts; /* allowed sub-elements of this element */
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const char* defaultsubelt; /* subelement for suggested auto-repair
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if necessary or NULL */
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const char** attrs_opt; /* Optional Attributes */
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const char** attrs_depr; /* Additional deprecated attributes */
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const char** attrs_req; /* Required attributes */
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};
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/*
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* Internal description of an HTML entity.
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*/
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typedef struct _htmlEntityDesc htmlEntityDesc;
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typedef htmlEntityDesc *htmlEntityDescPtr;
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struct _htmlEntityDesc {
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unsigned int value; /* the UNICODE value for the character */
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const char *name; /* The entity name */
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const char *desc; /* the description */
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};
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/*
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* There is only few public functions.
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*/
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XMLPUBFUN const htmlElemDesc * XMLCALL
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htmlTagLookup (const xmlChar *tag);
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XMLPUBFUN const htmlEntityDesc * XMLCALL
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htmlEntityLookup(const xmlChar *name);
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XMLPUBFUN const htmlEntityDesc * XMLCALL
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htmlEntityValueLookup(unsigned int value);
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XMLPUBFUN int XMLCALL
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htmlIsAutoClosed(htmlDocPtr doc,
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htmlNodePtr elem);
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XMLPUBFUN int XMLCALL
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htmlAutoCloseTag(htmlDocPtr doc,
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const xmlChar *name,
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htmlNodePtr elem);
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XMLPUBFUN const htmlEntityDesc * XMLCALL
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htmlParseEntityRef(htmlParserCtxtPtr ctxt,
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const xmlChar **str);
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XMLPUBFUN int XMLCALL
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htmlParseCharRef(htmlParserCtxtPtr ctxt);
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XMLPUBFUN void XMLCALL
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htmlParseElement(htmlParserCtxtPtr ctxt);
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XMLPUBFUN htmlParserCtxtPtr XMLCALL
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htmlNewParserCtxt(void);
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XMLPUBFUN htmlParserCtxtPtr XMLCALL
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htmlCreateMemoryParserCtxt(const char *buffer,
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int size);
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XMLPUBFUN int XMLCALL
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htmlParseDocument(htmlParserCtxtPtr ctxt);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlSAXParseDoc (const xmlChar *cur,
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const char *encoding,
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htmlSAXHandlerPtr sax,
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void *userData);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlParseDoc (const xmlChar *cur,
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const char *encoding);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlSAXParseFile(const char *filename,
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const char *encoding,
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htmlSAXHandlerPtr sax,
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void *userData);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlParseFile (const char *filename,
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const char *encoding);
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XMLPUBFUN int XMLCALL
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UTF8ToHtml (unsigned char *out,
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int *outlen,
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const unsigned char *in,
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int *inlen);
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XMLPUBFUN int XMLCALL
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htmlEncodeEntities(unsigned char *out,
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int *outlen,
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const unsigned char *in,
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int *inlen, int quoteChar);
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XMLPUBFUN int XMLCALL
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htmlIsScriptAttribute(const xmlChar *name);
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XMLPUBFUN int XMLCALL
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htmlHandleOmittedElem(int val);
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#ifdef LIBXML_PUSH_ENABLED
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/**
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* Interfaces for the Push mode.
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*/
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XMLPUBFUN htmlParserCtxtPtr XMLCALL
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htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax,
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void *user_data,
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const char *chunk,
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int size,
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const char *filename,
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xmlCharEncoding enc);
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XMLPUBFUN int XMLCALL
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htmlParseChunk (htmlParserCtxtPtr ctxt,
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const char *chunk,
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int size,
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int terminate);
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#endif /* LIBXML_PUSH_ENABLED */
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XMLPUBFUN void XMLCALL
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htmlFreeParserCtxt (htmlParserCtxtPtr ctxt);
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/*
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* New set of simpler/more flexible APIs
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*/
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/**
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* xmlParserOption:
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*
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* This is the set of XML parser options that can be passed down
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* to the xmlReadDoc() and similar calls.
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*/
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typedef enum {
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HTML_PARSE_RECOVER = 1<<0, /* Relaxed parsing */
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HTML_PARSE_NODEFDTD = 1<<2, /* do not default a doctype if not found */
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HTML_PARSE_NOERROR = 1<<5, /* suppress error reports */
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HTML_PARSE_NOWARNING= 1<<6, /* suppress warning reports */
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HTML_PARSE_PEDANTIC = 1<<7, /* pedantic error reporting */
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HTML_PARSE_NOBLANKS = 1<<8, /* remove blank nodes */
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HTML_PARSE_NONET = 1<<11,/* Forbid network access */
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HTML_PARSE_NOIMPLIED= 1<<13,/* Do not add implied html/body... elements */
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HTML_PARSE_COMPACT = 1<<16,/* compact small text nodes */
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HTML_PARSE_IGNORE_ENC=1<<21 /* ignore internal document encoding hint */
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} htmlParserOption;
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XMLPUBFUN void XMLCALL
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htmlCtxtReset (htmlParserCtxtPtr ctxt);
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XMLPUBFUN int XMLCALL
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htmlCtxtUseOptions (htmlParserCtxtPtr ctxt,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlReadDoc (const xmlChar *cur,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlReadFile (const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlReadMemory (const char *buffer,
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int size,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlReadFd (int fd,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlReadIO (xmlInputReadCallback ioread,
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xmlInputCloseCallback ioclose,
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void *ioctx,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlCtxtReadDoc (xmlParserCtxtPtr ctxt,
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const xmlChar *cur,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlCtxtReadFile (xmlParserCtxtPtr ctxt,
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const char *filename,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlCtxtReadMemory (xmlParserCtxtPtr ctxt,
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const char *buffer,
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int size,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlCtxtReadFd (xmlParserCtxtPtr ctxt,
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int fd,
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const char *URL,
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const char *encoding,
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int options);
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XMLPUBFUN htmlDocPtr XMLCALL
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htmlCtxtReadIO (xmlParserCtxtPtr ctxt,
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xmlInputReadCallback ioread,
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xmlInputCloseCallback ioclose,
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void *ioctx,
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const char *URL,
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const char *encoding,
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int options);
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/* NRK/Jan2003: further knowledge of HTML structure
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*/
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typedef enum {
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HTML_NA = 0 , /* something we don't check at all */
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HTML_INVALID = 0x1 ,
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HTML_DEPRECATED = 0x2 ,
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HTML_VALID = 0x4 ,
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HTML_REQUIRED = 0xc /* VALID bit set so ( & HTML_VALID ) is TRUE */
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} htmlStatus ;
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/* Using htmlElemDesc rather than name here, to emphasise the fact
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that otherwise there's a lookup overhead
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*/
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XMLPUBFUN htmlStatus XMLCALL htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ;
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XMLPUBFUN int XMLCALL htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ;
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XMLPUBFUN htmlStatus XMLCALL htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ;
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XMLPUBFUN htmlStatus XMLCALL htmlNodeStatus(const htmlNodePtr, int) ;
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/**
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* htmlDefaultSubelement:
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* @elt: HTML element
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*
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* Returns the default subelement for this element
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*/
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#define htmlDefaultSubelement(elt) elt->defaultsubelt
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/**
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* htmlElementAllowedHereDesc:
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* @parent: HTML parent element
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* @elt: HTML element
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*
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* Checks whether an HTML element description may be a
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* direct child of the specified element.
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*
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* Returns 1 if allowed; 0 otherwise.
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*/
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#define htmlElementAllowedHereDesc(parent,elt) \
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htmlElementAllowedHere((parent), (elt)->name)
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/**
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* htmlRequiredAttrs:
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* @elt: HTML element
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*
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* Returns the attributes required for the specified element.
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*/
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#define htmlRequiredAttrs(elt) (elt)->attrs_req
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#ifdef __cplusplus
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}
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#endif
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#endif /* LIBXML_HTML_ENABLED */
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#endif /* __HTML_PARSER_H__ */
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