Mercurial > hgrepos > Python2 > PyMuPDF
annotate mupdf-source/thirdparty/gumbo-parser/src/gumbo.h @ 40:aa33339d6b8a upstream
ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Sat, 11 Oct 2025 11:31:38 +0200 |
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1 // Copyright 2010 Google Inc. All Rights Reserved. |
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2 // |
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3 // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 // you may not use this file except in compliance with the License. |
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5 // You may obtain a copy of the License at |
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6 // |
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7 // http://www.apache.org/licenses/LICENSE-2.0 |
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8 // |
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9 // Unless required by applicable law or agreed to in writing, software |
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10 // distributed under the License is distributed on an "AS IS" BASIS, |
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11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 // See the License for the specific language governing permissions and |
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13 // limitations under the License. |
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14 // |
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15 // Author: jdtang@google.com (Jonathan Tang) |
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16 // |
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17 // We use Gumbo as a prefix for types, gumbo_ as a prefix for functions, and |
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18 // GUMBO_ as a prefix for enum constants (static constants get the Google-style |
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19 // kGumbo prefix). |
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20 |
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21 /** |
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22 * @file |
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23 * @mainpage Gumbo HTML Parser |
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24 * |
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25 * This provides a conformant, no-dependencies implementation of the HTML5 |
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26 * parsing algorithm. It supports only UTF8; if you need to parse a different |
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27 * encoding, run a preprocessing step to convert to UTF8. It returns a parse |
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28 * tree made of the structs in this file. |
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29 * |
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30 * Example: |
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31 * @code |
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32 * GumboOutput* output = gumbo_parse(input); |
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33 * do_something_with_doctype(output->document); |
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34 * do_something_with_html_tree(output->root); |
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35 * gumbo_destroy_output(&options, output); |
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36 * @endcode |
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37 * HTML5 Spec: |
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38 * |
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39 * http://www.whatwg.org/specs/web-apps/current-work/multipage/syntax.html |
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40 */ |
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41 |
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42 #ifndef GUMBO_GUMBO_H_ |
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43 #define GUMBO_GUMBO_H_ |
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44 |
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45 #ifdef _MSC_VER |
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46 #ifndef _CRT_SECURE_NO_WARNINGS |
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47 #define _CRT_SECURE_NO_WARNINGS |
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48 #endif |
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49 #define fileno _fileno |
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50 #endif |
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51 |
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52 #include <stdbool.h> |
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53 #include <stddef.h> |
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54 |
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55 #ifdef __cplusplus |
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56 extern "C" { |
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57 #endif |
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58 |
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59 /** |
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60 * A struct representing a character position within the original text buffer. |
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61 * Line and column numbers are 1-based and offsets are 0-based, which matches |
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62 * how most editors and command-line tools work. Also, columns measure |
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63 * positions in terms of characters while offsets measure by bytes; this is |
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64 * because the offset field is often used to pull out a particular region of |
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65 * text (which in most languages that bind to C implies pointer arithmetic on a |
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66 * buffer of bytes), while the column field is often used to reference a |
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67 * particular column on a printable display, which nowadays is usually UTF-8. |
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68 */ |
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69 typedef struct { |
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70 unsigned int line; |
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71 unsigned int column; |
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72 unsigned int offset; |
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73 } GumboSourcePosition; |
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74 |
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75 /** |
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76 * A SourcePosition used for elements that have no source position, i.e. |
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77 * parser-inserted elements. |
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78 */ |
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79 extern const GumboSourcePosition kGumboEmptySourcePosition; |
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80 |
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81 /** |
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82 * A struct representing a string or part of a string. Strings within the |
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83 * parser are represented by a char* and a length; the char* points into |
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84 * an existing data buffer owned by some other code (often the original input). |
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85 * GumboStringPieces are assumed (by convention) to be immutable, because they |
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86 * may share data. Use GumboStringBuffer if you need to construct a string. |
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87 * Clients should assume that it is not NUL-terminated, and should always use |
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88 * explicit lengths when manipulating them. |
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89 */ |
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90 typedef struct { |
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91 /** A pointer to the beginning of the string. NULL iff length == 0. */ |
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92 const char* data; |
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93 |
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94 /** The length of the string fragment, in bytes. May be zero. */ |
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95 size_t length; |
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96 } GumboStringPiece; |
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97 |
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98 /** A constant to represent a 0-length null string. */ |
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99 extern const GumboStringPiece kGumboEmptyString; |
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100 |
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101 /** |
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102 * Compares two GumboStringPieces, and returns true if they're equal or false |
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103 * otherwise. |
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104 */ |
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105 bool gumbo_string_equals( |
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106 const GumboStringPiece* str1, const GumboStringPiece* str2); |
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107 |
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108 /** |
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109 * Compares two GumboStringPieces ignoring case, and returns true if they're |
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110 * equal or false otherwise. |
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111 */ |
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112 bool gumbo_string_equals_ignore_case( |
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113 const GumboStringPiece* str1, const GumboStringPiece* str2); |
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114 |
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115 /** |
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116 * A simple vector implementation. This stores a pointer to a data array and a |
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117 * length. All elements are stored as void*; client code must cast to the |
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118 * appropriate type. Overflows upon addition result in reallocation of the data |
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119 * array, with the size doubling to maintain O(1) amortized cost. There is no |
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120 * removal function, as this isn't needed for any of the operations within this |
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121 * library. Iteration can be done through inspecting the structure directly in |
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122 * a for-loop. |
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123 */ |
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124 typedef struct { |
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125 /** Data elements. This points to a dynamically-allocated array of capacity |
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126 * elements, each a void* to the element itself. |
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127 */ |
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128 void** data; |
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129 |
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130 /** Number of elements currently in the vector. */ |
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131 unsigned int length; |
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132 |
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133 /** Current array capacity. */ |
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134 unsigned int capacity; |
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135 } GumboVector; |
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136 |
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137 /** An empty (0-length, 0-capacity) GumboVector. */ |
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138 extern const GumboVector kGumboEmptyVector; |
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139 |
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140 /** |
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141 * Returns the first index at which an element appears in this vector (testing |
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142 * by pointer equality), or -1 if it never does. |
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143 */ |
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144 int gumbo_vector_index_of(GumboVector* vector, const void* element); |
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145 |
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146 /** |
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147 * An enum for all the tags defined in the HTML5 standard. These correspond to |
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148 * the tag names themselves. Enum constants exist only for tags which appear in |
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149 * the spec itself (or for tags with special handling in the SVG and MathML |
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150 * namespaces); any other tags appear as GUMBO_TAG_UNKNOWN and the actual tag |
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151 * name can be obtained through original_tag. |
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152 * |
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153 * This is mostly for API convenience, so that clients of this library don't |
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154 * need to perform a strcasecmp to find the normalized tag name. It also has |
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155 * efficiency benefits, by letting the parser work with enums instead of |
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156 * strings. |
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157 */ |
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158 typedef enum { |
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159 // Load all the tags from an external source, generated from tag.in. |
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160 #include "tag_enum.h" |
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161 // Used for all tags that don't have special handling in HTML. Add new tags |
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162 // to the end of tag.in so as to preserve backwards-compatibility. |
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163 GUMBO_TAG_UNKNOWN, |
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164 // A marker value to indicate the end of the enum, for iterating over it. |
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165 // Also used as the terminator for varargs functions that take tags. |
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166 GUMBO_TAG_LAST, |
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167 } GumboTag; |
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168 |
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169 /** |
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170 * Returns the normalized (usually all-lowercased, except for foreign content) |
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171 * tag name for an GumboTag enum. Return value is static data owned by the |
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172 * library. |
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173 */ |
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174 const char* gumbo_normalized_tagname(GumboTag tag); |
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175 |
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176 /** |
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177 * Extracts the tag name from the original_text field of an element or token by |
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178 * stripping off </> characters and attributes and adjusting the passed-in |
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179 * GumboStringPiece appropriately. The tag name is in the original case and |
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180 * shares a buffer with the original text, to simplify memory management. |
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181 * Behavior is undefined if a string-piece that doesn't represent an HTML tag |
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182 * (<tagname> or </tagname>) is passed in. If the string piece is completely |
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183 * empty (NULL data pointer), then this function will exit successfully as a |
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184 * no-op. |
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185 */ |
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186 void gumbo_tag_from_original_text(GumboStringPiece* text); |
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187 |
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188 /** |
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189 * Fixes the case of SVG elements that are not all lowercase. |
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190 * http://www.whatwg.org/specs/web-apps/current-work/multipage/tree-construction.html#parsing-main-inforeign |
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191 * This is not done at parse time because there's no place to store a mutated |
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192 * tag name. tag_name is an enum (which will be TAG_UNKNOWN for most SVG tags |
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193 * without special handling), while original_tag_name is a pointer into the |
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194 * original buffer. Instead, we provide this helper function that clients can |
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195 * use to rename SVG tags as appropriate. |
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196 * Returns the case-normalized SVG tagname if a replacement is found, or NULL if |
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197 * no normalization is called for. The return value is static data and owned by |
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198 * the library. |
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199 */ |
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200 const char* gumbo_normalize_svg_tagname(const GumboStringPiece* tagname); |
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201 |
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202 /** |
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203 * Converts a tag name string (which may be in upper or mixed case) to a tag |
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204 * enum. The `tag` version expects `tagname` to be NULL-terminated |
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205 */ |
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206 GumboTag gumbo_tag_enum(const char* tagname); |
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207 GumboTag gumbo_tagn_enum(const char* tagname, size_t length); |
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208 |
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209 /** |
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210 * Attribute namespaces. |
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211 * HTML includes special handling for XLink, XML, and XMLNS namespaces on |
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212 * attributes. Everything else goes in the generic "NONE" namespace. |
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213 */ |
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214 typedef enum { |
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215 GUMBO_ATTR_NAMESPACE_NONE, |
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216 GUMBO_ATTR_NAMESPACE_XLINK, |
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217 GUMBO_ATTR_NAMESPACE_XML, |
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218 GUMBO_ATTR_NAMESPACE_XMLNS, |
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219 } GumboAttributeNamespaceEnum; |
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220 |
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221 /** |
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222 * A struct representing a single attribute on an HTML tag. This is a |
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223 * name-value pair, but also includes information about source locations and |
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224 * original source text. |
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225 */ |
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226 typedef struct { |
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227 /** |
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228 * The namespace for the attribute. This will usually be |
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229 * GUMBO_ATTR_NAMESPACE_NONE, but some XLink/XMLNS/XML attributes take special |
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230 * values, per: |
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231 * http://www.whatwg.org/specs/web-apps/current-work/multipage/tree-construction.html#adjust-foreign-attributes |
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232 */ |
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233 GumboAttributeNamespaceEnum attr_namespace; |
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234 |
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235 /** |
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236 * The name of the attribute. This is in a freshly-allocated buffer to deal |
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237 * with case-normalization, and is null-terminated. |
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238 */ |
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239 const char* name; |
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240 |
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241 /** |
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242 * The original text of the attribute name, as a pointer into the original |
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243 * source buffer. |
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244 */ |
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245 GumboStringPiece original_name; |
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246 |
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247 /** |
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248 * The value of the attribute. This is in a freshly-allocated buffer to deal |
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249 * with unescaping, and is null-terminated. It does not include any quotes |
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250 * that surround the attribute. If the attribute has no value (for example, |
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251 * 'selected' on a checkbox), this will be an empty string. |
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252 */ |
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253 const char* value; |
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254 |
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255 /** |
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256 * The original text of the value of the attribute. This points into the |
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257 * original source buffer. It includes any quotes that surround the |
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258 * attribute, and you can look at original_value.data[0] and |
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259 * original_value.data[original_value.length - 1] to determine what the quote |
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260 * characters were. If the attribute has no value, this will be a 0-length |
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261 * string. |
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262 */ |
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263 GumboStringPiece original_value; |
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264 |
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265 /** The starting position of the attribute name. */ |
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266 GumboSourcePosition name_start; |
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267 |
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268 /** |
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269 * The ending position of the attribute name. This is not always derivable |
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270 * from the starting position of the value because of the possibility of |
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271 * whitespace around the = sign. |
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272 */ |
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273 GumboSourcePosition name_end; |
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274 |
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275 /** The starting position of the attribute value. */ |
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276 GumboSourcePosition value_start; |
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277 |
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278 /** The ending position of the attribute value. */ |
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279 GumboSourcePosition value_end; |
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280 } GumboAttribute; |
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281 |
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282 /** |
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283 * Given a vector of GumboAttributes, look up the one with the specified name |
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284 * and return it, or NULL if no such attribute exists. This uses a |
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285 * case-insensitive match, as HTML is case-insensitive. |
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286 */ |
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287 GumboAttribute* gumbo_get_attribute(const GumboVector* attrs, const char* name); |
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288 |
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289 /** |
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290 * Enum denoting the type of node. This determines the type of the node.v |
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291 * union. |
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292 */ |
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293 typedef enum { |
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294 /** Document node. v will be a GumboDocument. */ |
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295 GUMBO_NODE_DOCUMENT, |
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296 /** Element node. v will be a GumboElement. */ |
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297 GUMBO_NODE_ELEMENT, |
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298 /** Text node. v will be a GumboText. */ |
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299 GUMBO_NODE_TEXT, |
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300 /** CDATA node. v will be a GumboText. */ |
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301 GUMBO_NODE_CDATA, |
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302 /** Comment node. v will be a GumboText, excluding comment delimiters. */ |
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303 GUMBO_NODE_COMMENT, |
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304 /** Text node, where all contents is whitespace. v will be a GumboText. */ |
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305 GUMBO_NODE_WHITESPACE, |
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306 /** Template node. This is separate from GUMBO_NODE_ELEMENT because many |
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307 * client libraries will want to ignore the contents of template nodes, as |
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308 * the spec suggests. Recursing on GUMBO_NODE_ELEMENT will do the right thing |
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309 * here, while clients that want to include template contents should also |
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310 * check for GUMBO_NODE_TEMPLATE. v will be a GumboElement. */ |
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311 GUMBO_NODE_TEMPLATE |
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312 } GumboNodeType; |
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313 |
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314 /** |
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315 * Forward declaration of GumboNode so it can be used recursively in |
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316 * GumboNode.parent. |
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317 */ |
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318 typedef struct GumboInternalNode GumboNode; |
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319 |
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320 /** |
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321 * http://www.whatwg.org/specs/web-apps/current-work/complete/dom.html#quirks-mode |
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322 */ |
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323 typedef enum { |
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324 GUMBO_DOCTYPE_NO_QUIRKS, |
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325 GUMBO_DOCTYPE_QUIRKS, |
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326 GUMBO_DOCTYPE_LIMITED_QUIRKS |
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327 } GumboQuirksModeEnum; |
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328 |
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329 /** |
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330 * Namespaces. |
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331 * Unlike in X(HT)ML, namespaces in HTML5 are not denoted by a prefix. Rather, |
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332 * anything inside an <svg> tag is in the SVG namespace, anything inside the |
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333 * <math> tag is in the MathML namespace, and anything else is inside the HTML |
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334 * namespace. No other namespaces are supported, so this can be an enum only. |
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335 */ |
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336 typedef enum { |
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337 GUMBO_NAMESPACE_HTML, |
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338 GUMBO_NAMESPACE_SVG, |
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339 GUMBO_NAMESPACE_MATHML |
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340 } GumboNamespaceEnum; |
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341 |
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342 /** |
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343 * Parse flags. |
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344 * We track the reasons for parser insertion of nodes and store them in a |
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345 * bitvector in the node itself. This lets client code optimize out nodes that |
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346 * are implied by the HTML structure of the document, or flag constructs that |
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347 * may not be allowed by a style guide, or track the prevalence of incorrect or |
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348 * tricky HTML code. |
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349 */ |
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350 typedef enum { |
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351 /** |
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352 * A normal node - both start and end tags appear in the source, nothing has |
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353 * been reparented. |
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354 */ |
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355 GUMBO_INSERTION_NORMAL = 0, |
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356 |
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357 /** |
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358 * A node inserted by the parser to fulfill some implicit insertion rule. |
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359 * This is usually set in addition to some other flag giving a more specific |
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360 * insertion reason; it's a generic catch-all term meaning "The start tag for |
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361 * this node did not appear in the document source". |
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362 */ |
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363 GUMBO_INSERTION_BY_PARSER = 1 << 0, |
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364 |
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365 /** |
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366 * A flag indicating that the end tag for this node did not appear in the |
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367 * document source. Note that in some cases, you can still have |
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368 * parser-inserted nodes with an explicit end tag: for example, "Text</html>" |
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369 * has GUMBO_INSERTED_BY_PARSER set on the <html> node, but |
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370 * GUMBO_INSERTED_END_TAG_IMPLICITLY is unset, as the </html> tag actually |
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371 * exists. This flag will be set only if the end tag is completely missing; |
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372 * in some cases, the end tag may be misplaced (eg. a </body> tag with text |
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373 * afterwards), which will leave this flag unset and require clients to |
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374 * inspect the parse errors for that case. |
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375 */ |
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376 GUMBO_INSERTION_IMPLICIT_END_TAG = 1 << 1, |
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377 |
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378 // Value 1 << 2 was for a flag that has since been removed. |
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379 |
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380 /** |
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381 * A flag for nodes that are inserted because their presence is implied by |
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382 * other tags, eg. <html>, <head>, <body>, <tbody>, etc. |
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383 */ |
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384 GUMBO_INSERTION_IMPLIED = 1 << 3, |
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|
385 |
|
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386 /** |
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387 * A flag for nodes that are converted from their end tag equivalents. For |
|
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388 * example, </p> when no paragraph is open implies that the parser should |
|
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389 * create a <p> tag and immediately close it, while </br> means the same thing |
|
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390 * as <br>. |
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391 */ |
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392 GUMBO_INSERTION_CONVERTED_FROM_END_TAG = 1 << 4, |
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393 |
|
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394 /** A flag for nodes that are converted from the parse of an <isindex> tag. */ |
|
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395 GUMBO_INSERTION_FROM_ISINDEX = 1 << 5, |
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396 |
|
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397 /** A flag for <image> tags that are rewritten as <img>. */ |
|
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398 GUMBO_INSERTION_FROM_IMAGE = 1 << 6, |
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399 |
|
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400 /** |
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|
401 * A flag for nodes that are cloned as a result of the reconstruction of |
|
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402 * active formatting elements. This is set only on the clone; the initial |
|
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403 * portion of the formatting run is a NORMAL node with an IMPLICIT_END_TAG. |
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|
404 */ |
|
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405 GUMBO_INSERTION_RECONSTRUCTED_FORMATTING_ELEMENT = 1 << 7, |
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406 |
|
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|
407 /** A flag for nodes that are cloned by the adoption agency algorithm. */ |
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408 GUMBO_INSERTION_ADOPTION_AGENCY_CLONED = 1 << 8, |
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409 |
|
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|
410 /** A flag for nodes that are moved by the adoption agency algorithm. */ |
|
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411 GUMBO_INSERTION_ADOPTION_AGENCY_MOVED = 1 << 9, |
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412 |
|
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413 /** |
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414 * A flag for nodes that have been foster-parented out of a table (or |
|
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415 * should've been foster-parented, if verbatim mode is set). |
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416 */ |
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417 GUMBO_INSERTION_FOSTER_PARENTED = 1 << 10, |
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418 } GumboParseFlags; |
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419 |
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420 /** |
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421 * Information specific to document nodes. |
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|
422 */ |
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423 typedef struct { |
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424 /** |
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425 * An array of GumboNodes, containing the children of this element. This will |
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426 * normally consist of the <html> element and any comment nodes found. |
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427 * Pointers are owned. |
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428 */ |
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429 GumboVector /* GumboNode* */ children; |
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430 |
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431 // True if there was an explicit doctype token as opposed to it being omitted. |
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432 bool has_doctype; |
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|
433 |
|
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434 // Fields from the doctype token, copied verbatim. |
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|
435 const char* name; |
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436 const char* public_identifier; |
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|
437 const char* system_identifier; |
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438 |
|
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|
439 /** |
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|
440 * Whether or not the document is in QuirksMode, as determined by the values |
|
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|
441 * in the GumboTokenDocType template. |
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parents:
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|
442 */ |
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|
443 GumboQuirksModeEnum doc_type_quirks_mode; |
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|
444 } GumboDocument; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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|
445 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
446 /** |
|
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|
447 * The struct used to represent TEXT, CDATA, COMMENT, and WHITESPACE elements. |
|
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448 * This contains just a block of text and its position. |
|
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|
449 */ |
|
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|
450 typedef struct { |
|
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|
451 /** |
|
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|
452 * The text of this node, after entities have been parsed and decoded. For |
|
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453 * comment/cdata nodes, this does not include the comment delimiters. |
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|
454 */ |
|
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|
455 const char* text; |
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|
456 |
|
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|
457 /** |
|
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458 * The original text of this node, as a pointer into the original buffer. For |
|
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459 * comment/cdata nodes, this includes the comment delimiters. |
|
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|
460 */ |
|
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|
461 GumboStringPiece original_text; |
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|
462 |
|
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|
463 /** |
|
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464 * The starting position of this node. This corresponds to the position of |
|
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465 * original_text, before entities are decoded. |
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|
466 * */ |
|
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|
467 GumboSourcePosition start_pos; |
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|
468 } GumboText; |
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|
469 |
|
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parents:
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|
470 /** |
|
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parents:
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|
471 * The struct used to represent all HTML elements. This contains information |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
472 * about the tag, attributes, and child nodes. |
|
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parents:
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|
473 */ |
|
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|
474 typedef struct { |
|
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parents:
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|
475 /** |
|
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parents:
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|
476 * An array of GumboNodes, containing the children of this element. Pointers |
|
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|
477 * are owned. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
478 */ |
|
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|
479 GumboVector /* GumboNode* */ children; |
|
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parents:
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|
480 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
481 /** The GumboTag enum for this element. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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|
482 GumboTag tag; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
483 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
484 /** The GumboNamespaceEnum for this element. */ |
|
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parents:
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|
485 GumboNamespaceEnum tag_namespace; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
486 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
487 /** |
|
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parents:
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|
488 * A GumboStringPiece pointing to the original tag text for this element, |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
489 * pointing directly into the source buffer. If the tag was inserted |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
490 * algorithmically (for example, <head> or <tbody> insertion), this will be a |
|
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parents:
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|
491 * zero-length string. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
492 */ |
|
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parents:
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|
493 GumboStringPiece original_tag; |
|
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parents:
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|
494 |
|
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parents:
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|
495 /** |
|
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parents:
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|
496 * A GumboStringPiece pointing to the original end tag text for this element. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
497 * If the end tag was inserted algorithmically, (for example, closing a |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
498 * self-closing tag), this will be a zero-length string. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
499 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
500 GumboStringPiece original_end_tag; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
501 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
changeset
|
502 /** The source position for the start of the start tag. */ |
|
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parents:
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|
503 GumboSourcePosition start_pos; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
changeset
|
504 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
505 /** The source position for the start of the end tag. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
506 GumboSourcePosition end_pos; |
|
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parents:
diff
changeset
|
507 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
508 /** |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
509 * An array of GumboAttributes, containing the attributes for this tag in the |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
510 * order that they were parsed. Pointers are owned. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
511 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
512 GumboVector /* GumboAttribute* */ attributes; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
513 } GumboElement; |
|
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parents:
diff
changeset
|
514 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
515 /** |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
516 * A supertype for GumboElement and GumboText, so that we can include one |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
517 * generic type in lists of children and cast as necessary to subtypes. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
518 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
519 struct GumboInternalNode { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
520 /** The type of node that this is. */ |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
521 GumboNodeType type; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
522 |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
523 /** Pointer back to parent node. Not owned. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
524 GumboNode* parent; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
525 |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
526 /** The index within the parent's children vector of this node. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
527 size_t index_within_parent; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
528 |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
529 /** |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
530 * A bitvector of flags containing information about why this element was |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
531 * inserted into the parse tree, including a variety of special parse |
|
b50eed0cc0ef
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
changeset
|
532 * situations. |
|
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|
533 */ |
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|
534 GumboParseFlags parse_flags; |
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|
535 |
|
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|
536 /** The actual node data. */ |
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|
537 union { |
|
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|
538 GumboDocument document; // For GUMBO_NODE_DOCUMENT. |
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|
539 GumboElement element; // For GUMBO_NODE_ELEMENT. |
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|
540 GumboText text; // For everything else. |
|
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|
541 } v; |
|
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|
542 }; |
|
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|
543 |
|
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|
544 /** |
|
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|
545 * The type for an allocator function. Takes the 'userdata' member of the |
|
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|
546 * GumboParser struct as its first argument. Semantics should be the same as |
|
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547 * malloc, i.e. return a block of size_t bytes on success or NULL on failure. |
|
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548 * Allocating a block of 0 bytes behaves as per malloc. |
|
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549 */ |
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parents:
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550 // TODO(jdtang): Add checks throughout the codebase for out-of-memory condition. |
|
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Franz Glasner <fzglas.hg@dom66.de>
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|
551 typedef void* (*GumboAllocatorFunction)(void* userdata, size_t size); |
|
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|
552 |
|
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parents:
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|
553 /** |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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|
554 * The type for a deallocator function. Takes the 'userdata' member of the |
|
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|
555 * GumboParser struct as its first argument. |
|
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Franz Glasner <fzglas.hg@dom66.de>
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|
556 */ |
|
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parents:
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|
557 typedef void (*GumboDeallocatorFunction)(void* userdata, void* ptr); |
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parents:
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|
558 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
559 /** |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
560 * Input struct containing configuration options for the parser. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
561 * These let you specify alternate memory managers, provide different error |
|
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Franz Glasner <fzglas.hg@dom66.de>
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|
562 * handling, etc. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
563 * Use kGumboDefaultOptions for sensible defaults, and only set what you need. |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
564 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
565 typedef struct GumboInternalOptions { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
566 /** A memory allocator function. Default: malloc. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
567 GumboAllocatorFunction allocator; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
568 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
569 /** A memory deallocator function. Default: free. */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
570 GumboDeallocatorFunction deallocator; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
571 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
572 /** |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
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|
573 * An opaque object that's passed in as the first argument to all callbacks |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
574 * used by this library. Default: NULL. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
575 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
576 void* userdata; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
577 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
578 /** |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
579 * The tab-stop size, for computing positions in source code that uses tabs. |
|
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580 * Default: 8. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
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|
581 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
582 int tab_stop; |
|
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|
583 |
|
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parents:
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|
584 /** |
|
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parents:
diff
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|
585 * Whether or not to stop parsing when the first error is encountered. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
586 * Default: false. |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
587 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
588 bool stop_on_first_error; |
|
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parents:
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|
589 |
|
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parents:
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|
590 /** |
|
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parents:
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|
591 * The maximum number of errors before the parser stops recording them. This |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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changeset
|
592 * is provided so that if the page is totally borked, we don't completely fill |
|
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parents:
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|
593 * up the errors vector and exhaust memory with useless redundant errors. Set |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
594 * to -1 to disable the limit. |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
595 * Default: -1 |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
596 */ |
|
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parents:
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|
597 int max_errors; |
|
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parents:
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|
598 |
|
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parents:
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|
599 /** |
|
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parents:
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|
600 * The fragment context for parsing: |
|
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|
601 * https://html.spec.whatwg.org/multipage/syntax.html#parsing-html-fragments |
|
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|
602 * |
|
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parents:
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|
603 * If GUMBO_TAG_LAST is passed here, it is assumed to be "no fragment", i.e. |
|
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parents:
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|
604 * the regular parsing algorithm. Otherwise, pass the tag enum for the |
|
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parents:
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|
605 * intended parent of the parsed fragment. We use just the tag enum rather |
|
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parents:
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|
606 * than a full node because that's enough to set all the parsing context we |
|
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parents:
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|
607 * need, and it provides some additional flexibility for client code to act as |
|
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parents:
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|
608 * if parsing a fragment even when a full HTML tree isn't available. |
|
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parents:
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|
609 * |
|
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parents:
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|
610 * Default: GUMBO_TAG_LAST |
|
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parents:
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|
611 */ |
|
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parents:
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|
612 GumboTag fragment_context; |
|
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parents:
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|
613 |
|
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parents:
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|
614 /** |
|
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parents:
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|
615 * The namespace for the fragment context. This lets client code |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
616 * differentiate between, say, parsing a <title> tag in SVG vs. parsing it in |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
617 * HTML. |
|
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|
618 * Default: GUMBO_NAMESPACE_HTML |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
619 */ |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
620 GumboNamespaceEnum fragment_namespace; |
|
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parents:
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|
621 } GumboOptions; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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622 |
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623 /** Default options struct; use this with gumbo_parse_with_options. */ |
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624 extern const GumboOptions kGumboDefaultOptions; |
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625 |
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626 /** The output struct containing the results of the parse. */ |
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627 typedef struct GumboInternalOutput { |
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628 /** |
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629 * Pointer to the document node. This is a GumboNode of type NODE_DOCUMENT |
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630 * that contains the entire document as its child. |
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631 */ |
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632 GumboNode* document; |
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633 |
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634 /** |
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635 * Pointer to the root node. This the <html> tag that forms the root of the |
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636 * document. |
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637 */ |
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638 GumboNode* root; |
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639 |
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640 /** |
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641 * A list of errors that occurred during the parse. |
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642 * NOTE: In version 1.0 of this library, the API for errors hasn't been fully |
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643 * fleshed out and may change in the future. For this reason, the GumboError |
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644 * header isn't part of the public API. Contact us if you need errors |
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645 * reported so we can work out something appropriate for your use-case. |
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646 */ |
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647 GumboVector /* GumboError */ errors; |
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648 } GumboOutput; |
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649 |
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650 /** |
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651 * Parses a buffer of UTF8 text into an GumboNode parse tree. The buffer must |
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652 * live at least as long as the parse tree, as some fields (eg. original_text) |
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653 * point directly into the original buffer. |
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654 * |
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655 * This doesn't support buffers longer than 4 gigabytes. |
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656 */ |
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657 GumboOutput* gumbo_parse(const char* buffer); |
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658 |
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659 /** |
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660 * Extended version of gumbo_parse that takes an explicit options structure, |
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661 * buffer, and length. |
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662 */ |
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663 GumboOutput* gumbo_parse_with_options( |
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664 const GumboOptions* options, const char* buffer, size_t buffer_length); |
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665 |
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666 /** Release the memory used for the parse tree & parse errors. */ |
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667 void gumbo_destroy_output(const GumboOptions* options, GumboOutput* output); |
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668 |
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669 #ifdef __cplusplus |
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670 } |
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671 #endif |
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672 |
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673 #endif // GUMBO_GUMBO_H_ |
