1 | /* |
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2 | * Summary: interface for an HTML 4.0 non-verifying parser |
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3 | * Description: this module implements an HTML 4.0 non-verifying parser |
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4 | * with API compatible with the XML parser ones. It should |
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5 | * be able to parse "real world" HTML, even if severely |
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6 | * broken from a specification point of view. |
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7 | * |
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8 | * Copy: See Copyright for the status of this software. |
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9 | * |
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10 | * Author: Daniel Veillard |
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11 | */ |
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12 | |
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13 | #ifndef __HTML_PARSER_H__ |
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14 | #define __HTML_PARSER_H__ |
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15 | #include <libxml/xmlversion.h> |
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16 | #include <libxml/parser.h> |
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17 | |
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18 | #ifdef LIBXML_HTML_ENABLED |
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19 | |
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20 | #ifdef __cplusplus |
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21 | extern "C" { |
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22 | #endif |
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23 | |
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24 | /* |
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25 | * Most of the back-end structures from XML and HTML are shared. |
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26 | */ |
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27 | typedef xmlParserCtxt htmlParserCtxt; |
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28 | typedef xmlParserCtxtPtr htmlParserCtxtPtr; |
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29 | typedef xmlParserNodeInfo htmlParserNodeInfo; |
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30 | typedef xmlSAXHandler htmlSAXHandler; |
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31 | typedef xmlSAXHandlerPtr htmlSAXHandlerPtr; |
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32 | typedef xmlParserInput htmlParserInput; |
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33 | typedef xmlParserInputPtr htmlParserInputPtr; |
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34 | typedef xmlDocPtr htmlDocPtr; |
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35 | typedef xmlNodePtr htmlNodePtr; |
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36 | |
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37 | /* |
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38 | * Internal description of an HTML element, representing HTML 4.01 |
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39 | * and XHTML 1.0 (which share the same structure). |
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40 | */ |
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41 | typedef struct _htmlElemDesc htmlElemDesc; |
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42 | typedef htmlElemDesc *htmlElemDescPtr; |
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43 | struct _htmlElemDesc { |
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44 | const char *name; /* The tag name */ |
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45 | char startTag; /* Whether the start tag can be implied */ |
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46 | char endTag; /* Whether the end tag can be implied */ |
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47 | char saveEndTag; /* Whether the end tag should be saved */ |
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48 | char empty; /* Is this an empty element ? */ |
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49 | char depr; /* Is this a deprecated element ? */ |
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50 | char dtd; /* 1: only in Loose DTD, 2: only Frameset one */ |
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51 | char isinline; /* is this a block 0 or inline 1 element */ |
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52 | const char *desc; /* the description */ |
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53 | |
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54 | /* NRK Jan.2003 |
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55 | * New fields encapsulating HTML structure |
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56 | * |
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57 | * Bugs: |
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58 | * This is a very limited representation. It fails to tell us when |
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59 | * an element *requires* subelements (we only have whether they're |
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60 | * allowed or not), and it doesn't tell us where CDATA and PCDATA |
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61 | * are allowed. Some element relationships are not fully represented: |
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62 | * these are flagged with the word MODIFIER |
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63 | */ |
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64 | const char** subelts; /* allowed sub-elements of this element */ |
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65 | const char* defaultsubelt; /* subelement for suggested auto-repair |
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66 | if necessary or NULL */ |
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67 | const char** attrs_opt; /* Optional Attributes */ |
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68 | const char** attrs_depr; /* Additional deprecated attributes */ |
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69 | const char** attrs_req; /* Required attributes */ |
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70 | }; |
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71 | |
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72 | /* |
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73 | * Internal description of an HTML entity. |
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74 | */ |
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75 | typedef struct _htmlEntityDesc htmlEntityDesc; |
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76 | typedef htmlEntityDesc *htmlEntityDescPtr; |
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77 | struct _htmlEntityDesc { |
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78 | unsigned int value; /* the UNICODE value for the character */ |
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79 | const char *name; /* The entity name */ |
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80 | const char *desc; /* the description */ |
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81 | }; |
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82 | |
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83 | /* |
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84 | * There is only few public functions. |
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85 | */ |
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86 | XMLPUBFUN const htmlElemDesc * XMLCALL |
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87 | htmlTagLookup (const xmlChar *tag); |
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88 | XMLPUBFUN const htmlEntityDesc * XMLCALL |
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89 | htmlEntityLookup(const xmlChar *name); |
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90 | XMLPUBFUN const htmlEntityDesc * XMLCALL |
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91 | htmlEntityValueLookup(unsigned int value); |
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92 | |
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93 | XMLPUBFUN int XMLCALL |
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94 | htmlIsAutoClosed(htmlDocPtr doc, |
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95 | htmlNodePtr elem); |
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96 | XMLPUBFUN int XMLCALL |
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97 | htmlAutoCloseTag(htmlDocPtr doc, |
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98 | const xmlChar *name, |
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99 | htmlNodePtr elem); |
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100 | XMLPUBFUN const htmlEntityDesc * XMLCALL |
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101 | htmlParseEntityRef(htmlParserCtxtPtr ctxt, |
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102 | const xmlChar **str); |
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103 | XMLPUBFUN int XMLCALL |
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104 | htmlParseCharRef(htmlParserCtxtPtr ctxt); |
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105 | XMLPUBFUN void XMLCALL |
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106 | htmlParseElement(htmlParserCtxtPtr ctxt); |
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107 | |
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108 | XMLPUBFUN htmlParserCtxtPtr XMLCALL |
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109 | htmlCreateMemoryParserCtxt(const char *buffer, |
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110 | int size); |
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111 | |
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112 | XMLPUBFUN int XMLCALL |
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113 | htmlParseDocument(htmlParserCtxtPtr ctxt); |
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114 | XMLPUBFUN htmlDocPtr XMLCALL |
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115 | htmlSAXParseDoc (xmlChar *cur, |
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116 | const char *encoding, |
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117 | htmlSAXHandlerPtr sax, |
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118 | void *userData); |
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119 | XMLPUBFUN htmlDocPtr XMLCALL |
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120 | htmlParseDoc (xmlChar *cur, |
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121 | const char *encoding); |
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122 | XMLPUBFUN htmlDocPtr XMLCALL |
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123 | htmlSAXParseFile(const char *filename, |
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124 | const char *encoding, |
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125 | htmlSAXHandlerPtr sax, |
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126 | void *userData); |
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127 | XMLPUBFUN htmlDocPtr XMLCALL |
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128 | htmlParseFile (const char *filename, |
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129 | const char *encoding); |
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130 | XMLPUBFUN int XMLCALL |
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131 | UTF8ToHtml (unsigned char *out, |
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132 | int *outlen, |
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133 | const unsigned char *in, |
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134 | int *inlen); |
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135 | XMLPUBFUN int XMLCALL |
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136 | htmlEncodeEntities(unsigned char *out, |
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137 | int *outlen, |
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138 | const unsigned char *in, |
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139 | int *inlen, int quoteChar); |
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140 | XMLPUBFUN int XMLCALL |
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141 | htmlIsScriptAttribute(const xmlChar *name); |
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142 | XMLPUBFUN int XMLCALL |
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143 | htmlHandleOmittedElem(int val); |
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144 | |
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145 | #ifdef LIBXML_PUSH_ENABLED |
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146 | /** |
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147 | * Interfaces for the Push mode. |
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148 | */ |
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149 | XMLPUBFUN htmlParserCtxtPtr XMLCALL |
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150 | htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax, |
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151 | void *user_data, |
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152 | const char *chunk, |
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153 | int size, |
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154 | const char *filename, |
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155 | xmlCharEncoding enc); |
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156 | XMLPUBFUN int XMLCALL |
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157 | htmlParseChunk (htmlParserCtxtPtr ctxt, |
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158 | const char *chunk, |
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159 | int size, |
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160 | int terminate); |
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161 | #endif /* LIBXML_PUSH_ENABLED */ |
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162 | |
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163 | XMLPUBFUN void XMLCALL |
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164 | htmlFreeParserCtxt (htmlParserCtxtPtr ctxt); |
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165 | |
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166 | /* |
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167 | * New set of simpler/more flexible APIs |
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168 | */ |
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169 | /** |
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170 | * xmlParserOption: |
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171 | * |
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172 | * This is the set of XML parser options that can be passed down |
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173 | * to the xmlReadDoc() and similar calls. |
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174 | */ |
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175 | typedef enum { |
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176 | HTML_PARSE_NOERROR = 1<<5, /* suppress error reports */ |
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177 | HTML_PARSE_NOWARNING= 1<<6, /* suppress warning reports */ |
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178 | HTML_PARSE_PEDANTIC = 1<<7, /* pedantic error reporting */ |
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179 | HTML_PARSE_NOBLANKS = 1<<8, /* remove blank nodes */ |
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180 | HTML_PARSE_NONET = 1<<11 /* Forbid network access */ |
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181 | } htmlParserOption; |
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182 | |
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183 | XMLPUBFUN void XMLCALL |
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184 | htmlCtxtReset (htmlParserCtxtPtr ctxt); |
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185 | XMLPUBFUN int XMLCALL |
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186 | htmlCtxtUseOptions (htmlParserCtxtPtr ctxt, |
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187 | int options); |
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188 | XMLPUBFUN htmlDocPtr XMLCALL |
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189 | htmlReadDoc (const xmlChar *cur, |
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190 | const char *URL, |
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191 | const char *encoding, |
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192 | int options); |
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193 | XMLPUBFUN htmlDocPtr XMLCALL |
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194 | htmlReadFile (const char *URL, |
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195 | const char *encoding, |
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196 | int options); |
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197 | XMLPUBFUN htmlDocPtr XMLCALL |
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198 | htmlReadMemory (const char *buffer, |
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199 | int size, |
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200 | const char *URL, |
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201 | const char *encoding, |
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202 | int options); |
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203 | XMLPUBFUN htmlDocPtr XMLCALL |
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204 | htmlReadFd (int fd, |
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205 | const char *URL, |
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206 | const char *encoding, |
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207 | int options); |
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208 | XMLPUBFUN htmlDocPtr XMLCALL |
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209 | htmlReadIO (xmlInputReadCallback ioread, |
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210 | xmlInputCloseCallback ioclose, |
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211 | void *ioctx, |
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212 | const char *URL, |
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213 | const char *encoding, |
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214 | int options); |
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215 | XMLPUBFUN htmlDocPtr XMLCALL |
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216 | htmlCtxtReadDoc (xmlParserCtxtPtr ctxt, |
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217 | const xmlChar *cur, |
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218 | const char *URL, |
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219 | const char *encoding, |
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220 | int options); |
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221 | XMLPUBFUN htmlDocPtr XMLCALL |
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222 | htmlCtxtReadFile (xmlParserCtxtPtr ctxt, |
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223 | const char *filename, |
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224 | const char *encoding, |
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225 | int options); |
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226 | XMLPUBFUN htmlDocPtr XMLCALL |
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227 | htmlCtxtReadMemory (xmlParserCtxtPtr ctxt, |
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228 | const char *buffer, |
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229 | int size, |
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230 | const char *URL, |
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231 | const char *encoding, |
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232 | int options); |
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233 | XMLPUBFUN htmlDocPtr XMLCALL |
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234 | htmlCtxtReadFd (xmlParserCtxtPtr ctxt, |
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235 | int fd, |
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236 | const char *URL, |
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237 | const char *encoding, |
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238 | int options); |
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239 | XMLPUBFUN htmlDocPtr XMLCALL |
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240 | htmlCtxtReadIO (xmlParserCtxtPtr ctxt, |
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241 | xmlInputReadCallback ioread, |
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242 | xmlInputCloseCallback ioclose, |
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243 | void *ioctx, |
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244 | const char *URL, |
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245 | const char *encoding, |
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246 | int options); |
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247 | |
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248 | /* NRK/Jan2003: further knowledge of HTML structure |
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249 | */ |
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250 | typedef enum { |
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251 | HTML_NA = 0 , /* something we don't check at all */ |
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252 | HTML_INVALID = 0x1 , |
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253 | HTML_DEPRECATED = 0x2 , |
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254 | HTML_VALID = 0x4 , |
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255 | HTML_REQUIRED = 0xc /* VALID bit set so ( & HTML_VALID ) is TRUE */ |
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256 | } htmlStatus ; |
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257 | |
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258 | /* Using htmlElemDesc rather than name here, to emphasise the fact |
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259 | that otherwise there's a lookup overhead |
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260 | */ |
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261 | XMLPUBFUN htmlStatus XMLCALL htmlAttrAllowed(const htmlElemDesc*, const xmlChar*, int) ; |
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262 | XMLPUBFUN int XMLCALL htmlElementAllowedHere(const htmlElemDesc*, const xmlChar*) ; |
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263 | XMLPUBFUN htmlStatus XMLCALL htmlElementStatusHere(const htmlElemDesc*, const htmlElemDesc*) ; |
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264 | XMLPUBFUN htmlStatus XMLCALL htmlNodeStatus(const htmlNodePtr, int) ; |
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265 | /** |
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266 | * htmlDefaultSubelement: |
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267 | * @elt: HTML element |
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268 | * |
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269 | * Returns the default subelement for this element |
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270 | */ |
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271 | #define htmlDefaultSubelement(elt) elt->defaultsubelt |
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272 | /** |
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273 | * htmlElementAllowedHereDesc: |
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274 | * @parent: HTML parent element |
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275 | * @elt: HTML element |
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276 | * |
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277 | * Checks whether an HTML element description may be a |
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278 | * direct child of the specified element. |
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279 | * |
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280 | * Returns 1 if allowed; 0 otherwise. |
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281 | */ |
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282 | #define htmlElementAllowedHereDesc(parent,elt) \ |
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283 | htmlElementAllowedHere((parent), (elt)->name) |
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284 | /** |
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285 | * htmlRequiredAttrs: |
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286 | * @elt: HTML element |
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287 | * |
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288 | * Returns the attributes required for the specified element. |
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289 | */ |
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290 | #define htmlRequiredAttrs(elt) (elt)->attrs_req |
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291 | |
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292 | |
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293 | #ifdef __cplusplus |
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294 | } |
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295 | #endif |
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296 | |
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297 | #endif /* LIBXML_HTML_ENABLED */ |
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298 | #endif /* __HTML_PARSER_H__ */ |
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