Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/soupsieve/css_parser.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """CSS selector parser.""" |
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2 import re |
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3 from functools import lru_cache |
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4 from . import util |
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5 from . import css_match as cm |
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6 from . import css_types as ct |
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7 from .util import SelectorSyntaxError |
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8 import warnings |
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9 |
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10 UNICODE_REPLACEMENT_CHAR = 0xFFFD |
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11 |
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12 # Simple pseudo classes that take no parameters |
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13 PSEUDO_SIMPLE = { |
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14 ":any-link", |
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15 ":empty", |
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16 ":first-child", |
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17 ":first-of-type", |
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18 ":in-range", |
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19 ":out-of-range", |
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20 ":last-child", |
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21 ":last-of-type", |
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22 ":link", |
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23 ":only-child", |
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24 ":only-of-type", |
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25 ":root", |
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26 ':checked', |
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27 ':default', |
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28 ':disabled', |
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29 ':enabled', |
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30 ':indeterminate', |
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31 ':optional', |
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32 ':placeholder-shown', |
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33 ':read-only', |
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34 ':read-write', |
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35 ':required', |
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36 ':scope', |
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37 ':defined' |
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38 } |
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39 |
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40 # Supported, simple pseudo classes that match nothing in the Soup Sieve environment |
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41 PSEUDO_SIMPLE_NO_MATCH = { |
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42 ':active', |
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43 ':current', |
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44 ':focus', |
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45 ':focus-visible', |
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46 ':focus-within', |
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47 ':future', |
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48 ':host', |
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49 ':hover', |
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50 ':local-link', |
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51 ':past', |
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52 ':paused', |
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53 ':playing', |
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54 ':target', |
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55 ':target-within', |
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56 ':user-invalid', |
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57 ':visited' |
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58 } |
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59 |
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60 # Complex pseudo classes that take selector lists |
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61 PSEUDO_COMPLEX = { |
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62 ':contains', |
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63 ':-soup-contains', |
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64 ':-soup-contains-own', |
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65 ':has', |
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66 ':is', |
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67 ':matches', |
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68 ':not', |
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69 ':where' |
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70 } |
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71 |
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72 PSEUDO_COMPLEX_NO_MATCH = { |
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73 ':current', |
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74 ':host', |
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75 ':host-context' |
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76 } |
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77 |
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78 # Complex pseudo classes that take very specific parameters and are handled special |
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79 PSEUDO_SPECIAL = { |
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80 ':dir', |
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81 ':lang', |
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82 ':nth-child', |
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83 ':nth-last-child', |
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84 ':nth-last-of-type', |
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85 ':nth-of-type' |
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86 } |
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87 |
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88 PSEUDO_SUPPORTED = PSEUDO_SIMPLE | PSEUDO_SIMPLE_NO_MATCH | PSEUDO_COMPLEX | PSEUDO_COMPLEX_NO_MATCH | PSEUDO_SPECIAL |
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89 |
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90 # Sub-patterns parts |
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91 # Whitespace |
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92 NEWLINE = r'(?:\r\n|(?!\r\n)[\n\f\r])' |
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93 WS = r'(?:[ \t]|{})'.format(NEWLINE) |
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94 # Comments |
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95 COMMENTS = r'(?:/\*[^*]*\*+(?:[^/*][^*]*\*+)*/)' |
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96 # Whitespace with comments included |
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97 WSC = r'(?:{ws}|{comments})'.format(ws=WS, comments=COMMENTS) |
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98 # CSS escapes |
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99 CSS_ESCAPES = r'(?:\\(?:[a-f0-9]{{1,6}}{ws}?|[^\r\n\f]|$))'.format(ws=WS) |
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100 CSS_STRING_ESCAPES = r'(?:\\(?:[a-f0-9]{{1,6}}{ws}?|[^\r\n\f]|$|{nl}))'.format(ws=WS, nl=NEWLINE) |
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101 # CSS Identifier |
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102 IDENTIFIER = r''' |
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103 (?:(?:-?(?:[^\x00-\x2f\x30-\x40\x5B-\x5E\x60\x7B-\x9f]|{esc})+|--) |
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104 (?:[^\x00-\x2c\x2e\x2f\x3A-\x40\x5B-\x5E\x60\x7B-\x9f]|{esc})*) |
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105 '''.format(esc=CSS_ESCAPES) |
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106 # `nth` content |
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107 NTH = r'(?:[-+])?(?:[0-9]+n?|n)(?:(?<=n){ws}*(?:[-+]){ws}*(?:[0-9]+))?'.format(ws=WSC) |
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108 # Value: quoted string or identifier |
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109 VALUE = r''' |
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110 (?:"(?:\\(?:.|{nl})|[^\\"\r\n\f]+)*?"|'(?:\\(?:.|{nl})|[^\\'\r\n\f]+)*?'|{ident}+) |
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111 '''.format(nl=NEWLINE, ident=IDENTIFIER) |
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112 # Attribute value comparison. `!=` is handled special as it is non-standard. |
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113 ATTR = r''' |
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114 (?:{ws}*(?P<cmp>[!~^|*$]?=){ws}*(?P<value>{value})(?:{ws}+(?P<case>[is]))?)?{ws}*\] |
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115 '''.format(ws=WSC, value=VALUE) |
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116 |
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117 # Selector patterns |
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118 # IDs (`#id`) |
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119 PAT_ID = r'\#{ident}'.format(ident=IDENTIFIER) |
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120 # Classes (`.class`) |
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121 PAT_CLASS = r'\.{ident}'.format(ident=IDENTIFIER) |
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122 # Prefix:Tag (`prefix|tag`) |
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123 PAT_TAG = r'(?P<tag_ns>(?:{ident}|\*)?\|)?(?P<tag_name>{ident}|\*)'.format(ident=IDENTIFIER) |
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124 # Attributes (`[attr]`, `[attr=value]`, etc.) |
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125 PAT_ATTR = r''' |
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126 \[{ws}*(?P<attr_ns>(?:{ident}|\*)?\|)?(?P<attr_name>{ident}){attr} |
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127 '''.format(ws=WSC, ident=IDENTIFIER, attr=ATTR) |
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128 # Pseudo class (`:pseudo-class`, `:pseudo-class(`) |
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129 PAT_PSEUDO_CLASS = r'(?P<name>:{ident})(?P<open>\({ws}*)?'.format(ws=WSC, ident=IDENTIFIER) |
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130 # Pseudo class special patterns. Matches `:pseudo-class(` for special case pseudo classes. |
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131 PAT_PSEUDO_CLASS_SPECIAL = r'(?P<name>:{ident})(?P<open>\({ws}*)'.format(ws=WSC, ident=IDENTIFIER) |
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132 # Custom pseudo class (`:--custom-pseudo`) |
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133 PAT_PSEUDO_CLASS_CUSTOM = r'(?P<name>:(?=--){ident})'.format(ident=IDENTIFIER) |
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134 # Closing pseudo group (`)`) |
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135 PAT_PSEUDO_CLOSE = r'{ws}*\)'.format(ws=WSC) |
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136 # Pseudo element (`::pseudo-element`) |
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137 PAT_PSEUDO_ELEMENT = r':{}'.format(PAT_PSEUDO_CLASS) |
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138 # At rule (`@page`, etc.) (not supported) |
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139 PAT_AT_RULE = r'@P{ident}'.format(ident=IDENTIFIER) |
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140 # Pseudo class `nth-child` (`:nth-child(an+b [of S]?)`, `:first-child`, etc.) |
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141 PAT_PSEUDO_NTH_CHILD = r''' |
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142 (?P<pseudo_nth_child>{name} |
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143 (?P<nth_child>{nth}|even|odd))(?:{wsc}*\)|(?P<of>{comments}*{ws}{wsc}*of{comments}*{ws}{wsc}*)) |
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144 '''.format(name=PAT_PSEUDO_CLASS_SPECIAL, wsc=WSC, comments=COMMENTS, ws=WS, nth=NTH) |
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145 # Pseudo class `nth-of-type` (`:nth-of-type(an+b)`, `:first-of-type`, etc.) |
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146 PAT_PSEUDO_NTH_TYPE = r''' |
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147 (?P<pseudo_nth_type>{name} |
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148 (?P<nth_type>{nth}|even|odd)){ws}*\) |
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149 '''.format(name=PAT_PSEUDO_CLASS_SPECIAL, ws=WSC, nth=NTH) |
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150 # Pseudo class language (`:lang("*-de", en)`) |
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151 PAT_PSEUDO_LANG = r'{name}(?P<values>{value}(?:{ws}*,{ws}*{value})*){ws}*\)'.format( |
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152 name=PAT_PSEUDO_CLASS_SPECIAL, ws=WSC, value=VALUE |
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153 ) |
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154 # Pseudo class direction (`:dir(ltr)`) |
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155 PAT_PSEUDO_DIR = r'{name}(?P<dir>ltr|rtl){ws}*\)'.format(name=PAT_PSEUDO_CLASS_SPECIAL, ws=WSC) |
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156 # Combining characters (`>`, `~`, ` `, `+`, `,`) |
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157 PAT_COMBINE = r'{wsc}*?(?P<relation>[,+>~]|{ws}(?![,+>~])){wsc}*'.format(ws=WS, wsc=WSC) |
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158 # Extra: Contains (`:contains(text)`) |
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159 PAT_PSEUDO_CONTAINS = r'{name}(?P<values>{value}(?:{ws}*,{ws}*{value})*){ws}*\)'.format( |
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160 name=PAT_PSEUDO_CLASS_SPECIAL, ws=WSC, value=VALUE |
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161 ) |
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162 |
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163 # Regular expressions |
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164 # CSS escape pattern |
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165 RE_CSS_ESC = re.compile(r'(?:(\\[a-f0-9]{{1,6}}{ws}?)|(\\[^\r\n\f])|(\\$))'.format(ws=WSC), re.I) |
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166 RE_CSS_STR_ESC = re.compile( |
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167 r'(?:(\\[a-f0-9]{{1,6}}{ws}?)|(\\[^\r\n\f])|(\\$)|(\\{nl}))'.format(ws=WS, nl=NEWLINE), re.I |
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168 ) |
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169 # Pattern to break up `nth` specifiers |
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170 RE_NTH = re.compile( |
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171 r'(?P<s1>[-+])?(?P<a>[0-9]+n?|n)(?:(?<=n){ws}*(?P<s2>[-+]){ws}*(?P<b>[0-9]+))?'.format(ws=WSC), |
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172 re.I |
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173 ) |
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174 # Pattern to iterate multiple values. |
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175 RE_VALUES = re.compile(r'(?:(?P<value>{value})|(?P<split>{ws}*,{ws}*))'.format(ws=WSC, value=VALUE), re.X) |
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176 # Whitespace checks |
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177 RE_WS = re.compile(WS) |
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178 RE_WS_BEGIN = re.compile('^{}*'.format(WSC)) |
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179 RE_WS_END = re.compile('{}*$'.format(WSC)) |
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180 RE_CUSTOM = re.compile(r'^{}$'.format(PAT_PSEUDO_CLASS_CUSTOM), re.X) |
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181 |
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182 # Constants |
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183 # List split token |
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184 COMMA_COMBINATOR = ',' |
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185 # Relation token for descendant |
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186 WS_COMBINATOR = " " |
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187 |
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188 # Parse flags |
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189 FLG_PSEUDO = 0x01 |
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190 FLG_NOT = 0x02 |
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191 FLG_RELATIVE = 0x04 |
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192 FLG_DEFAULT = 0x08 |
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193 FLG_HTML = 0x10 |
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194 FLG_INDETERMINATE = 0x20 |
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195 FLG_OPEN = 0x40 |
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196 FLG_IN_RANGE = 0x80 |
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197 FLG_OUT_OF_RANGE = 0x100 |
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198 FLG_PLACEHOLDER_SHOWN = 0x200 |
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199 |
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200 # Maximum cached patterns to store |
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201 _MAXCACHE = 500 |
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202 |
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203 |
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204 @lru_cache(maxsize=_MAXCACHE) |
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205 def _cached_css_compile(pattern, namespaces, custom, flags): |
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206 """Cached CSS compile.""" |
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207 |
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208 custom_selectors = process_custom(custom) |
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209 return cm.SoupSieve( |
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210 pattern, |
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211 CSSParser(pattern, custom=custom_selectors, flags=flags).process_selectors(), |
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212 namespaces, |
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213 custom, |
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214 flags |
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215 ) |
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216 |
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217 |
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218 def _purge_cache(): |
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219 """Purge the cache.""" |
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220 |
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221 _cached_css_compile.cache_clear() |
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222 |
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223 |
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224 def process_custom(custom): |
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225 """Process custom.""" |
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226 |
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227 custom_selectors = {} |
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228 if custom is not None: |
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229 for key, value in custom.items(): |
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230 name = util.lower(key) |
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231 if RE_CUSTOM.match(name) is None: |
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232 raise SelectorSyntaxError("The name '{}' is not a valid custom pseudo-class name".format(name)) |
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233 if name in custom_selectors: |
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234 raise KeyError("The custom selector '{}' has already been registered".format(name)) |
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235 custom_selectors[css_unescape(name)] = value |
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236 return custom_selectors |
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237 |
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238 |
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239 def css_unescape(content, string=False): |
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240 """ |
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241 Unescape CSS value. |
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242 |
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243 Strings allow for spanning the value on multiple strings by escaping a new line. |
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244 """ |
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245 |
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246 def replace(m): |
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247 """Replace with the appropriate substitute.""" |
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248 |
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249 if m.group(1): |
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250 codepoint = int(m.group(1)[1:], 16) |
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251 if codepoint == 0: |
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252 codepoint = UNICODE_REPLACEMENT_CHAR |
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253 value = chr(codepoint) |
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254 elif m.group(2): |
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255 value = m.group(2)[1:] |
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256 elif m.group(3): |
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257 value = '\ufffd' |
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258 else: |
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259 value = '' |
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260 |
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261 return value |
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262 |
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263 return (RE_CSS_ESC if not string else RE_CSS_STR_ESC).sub(replace, content) |
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264 |
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265 |
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266 def escape(ident): |
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267 """Escape identifier.""" |
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268 |
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269 string = [] |
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270 length = len(ident) |
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271 start_dash = length > 0 and ident[0] == '-' |
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272 if length == 1 and start_dash: |
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273 # Need to escape identifier that is a single `-` with no other characters |
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274 string.append('\\{}'.format(ident)) |
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275 else: |
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276 for index, c in enumerate(ident): |
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277 codepoint = ord(c) |
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278 if codepoint == 0x00: |
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279 string.append('\ufffd') |
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280 elif (0x01 <= codepoint <= 0x1F) or codepoint == 0x7F: |
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281 string.append('\\{:x} '.format(codepoint)) |
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282 elif (index == 0 or (start_dash and index == 1)) and (0x30 <= codepoint <= 0x39): |
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283 string.append('\\{:x} '.format(codepoint)) |
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284 elif ( |
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285 codepoint in (0x2D, 0x5F) or codepoint >= 0x80 or (0x30 <= codepoint <= 0x39) or |
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286 (0x30 <= codepoint <= 0x39) or (0x41 <= codepoint <= 0x5A) or (0x61 <= codepoint <= 0x7A) |
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287 ): |
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288 string.append(c) |
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289 else: |
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290 string.append('\\{}'.format(c)) |
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291 return ''.join(string) |
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292 |
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293 |
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294 class SelectorPattern(object): |
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295 """Selector pattern.""" |
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296 |
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297 def __init__(self, name, pattern): |
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298 """Initialize.""" |
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299 |
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300 self.name = name |
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301 self.re_pattern = re.compile(pattern, re.I | re.X | re.U) |
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302 |
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303 def get_name(self): |
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304 """Get name.""" |
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305 |
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306 return self.name |
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307 |
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308 def match(self, selector, index, flags): |
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309 """Match the selector.""" |
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310 |
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311 return self.re_pattern.match(selector, index) |
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312 |
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313 |
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314 class SpecialPseudoPattern(SelectorPattern): |
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315 """Selector pattern.""" |
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316 |
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317 def __init__(self, patterns): |
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318 """Initialize.""" |
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319 |
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320 self.patterns = {} |
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321 for p in patterns: |
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322 name = p[0] |
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323 pattern = p[3](name, p[2]) |
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324 for pseudo in p[1]: |
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325 self.patterns[pseudo] = pattern |
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326 |
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327 self.matched_name = None |
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328 self.re_pseudo_name = re.compile(PAT_PSEUDO_CLASS_SPECIAL, re.I | re.X | re.U) |
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329 |
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330 def get_name(self): |
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331 """Get name.""" |
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332 |
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333 return self.matched_name.get_name() |
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334 |
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335 def match(self, selector, index, flags): |
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336 """Match the selector.""" |
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337 |
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338 pseudo = None |
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339 m = self.re_pseudo_name.match(selector, index) |
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340 if m: |
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341 name = util.lower(css_unescape(m.group('name'))) |
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342 pattern = self.patterns.get(name) |
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343 if pattern: |
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344 pseudo = pattern.match(selector, index, flags) |
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345 if pseudo: |
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346 self.matched_name = pattern |
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347 |
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348 return pseudo |
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349 |
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350 |
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351 class _Selector(object): |
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352 """ |
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353 Intermediate selector class. |
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354 |
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355 This stores selector data for a compound selector as we are acquiring them. |
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356 Once we are done collecting the data for a compound selector, we freeze |
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357 the data in an object that can be pickled and hashed. |
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358 """ |
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359 |
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360 def __init__(self, **kwargs): |
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361 """Initialize.""" |
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362 |
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363 self.tag = kwargs.get('tag', None) |
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364 self.ids = kwargs.get('ids', []) |
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365 self.classes = kwargs.get('classes', []) |
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366 self.attributes = kwargs.get('attributes', []) |
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367 self.nth = kwargs.get('nth', []) |
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368 self.selectors = kwargs.get('selectors', []) |
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369 self.relations = kwargs.get('relations', []) |
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370 self.rel_type = kwargs.get('rel_type', None) |
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371 self.contains = kwargs.get('contains', []) |
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372 self.lang = kwargs.get('lang', []) |
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373 self.flags = kwargs.get('flags', 0) |
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374 self.no_match = kwargs.get('no_match', False) |
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375 |
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376 def _freeze_relations(self, relations): |
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377 """Freeze relation.""" |
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378 |
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379 if relations: |
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380 sel = relations[0] |
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381 sel.relations.extend(relations[1:]) |
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382 return ct.SelectorList([sel.freeze()]) |
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383 else: |
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384 return ct.SelectorList() |
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385 |
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386 def freeze(self): |
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387 """Freeze self.""" |
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388 |
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389 if self.no_match: |
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390 return ct.SelectorNull() |
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391 else: |
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392 return ct.Selector( |
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393 self.tag, |
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394 tuple(self.ids), |
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395 tuple(self.classes), |
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396 tuple(self.attributes), |
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397 tuple(self.nth), |
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398 tuple(self.selectors), |
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399 self._freeze_relations(self.relations), |
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400 self.rel_type, |
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401 tuple(self.contains), |
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402 tuple(self.lang), |
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403 self.flags |
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404 ) |
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405 |
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406 def __str__(self): # pragma: no cover |
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407 """String representation.""" |
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408 |
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409 return ( |
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410 '_Selector(tag={!r}, ids={!r}, classes={!r}, attributes={!r}, nth={!r}, selectors={!r}, ' |
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411 'relations={!r}, rel_type={!r}, contains={!r}, lang={!r}, flags={!r}, no_match={!r})' |
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412 ).format( |
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413 self.tag, self.ids, self.classes, self.attributes, self.nth, self.selectors, |
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414 self.relations, self.rel_type, self.contains, self.lang, self.flags, self.no_match |
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415 ) |
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416 |
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417 __repr__ = __str__ |
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418 |
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419 |
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420 class CSSParser(object): |
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421 """Parse CSS selectors.""" |
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422 |
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423 css_tokens = ( |
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424 SelectorPattern("pseudo_close", PAT_PSEUDO_CLOSE), |
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425 SpecialPseudoPattern( |
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426 ( |
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427 ( |
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428 "pseudo_contains", |
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429 (':contains', ':-soup-contains', ':-soup-contains-own'), |
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430 PAT_PSEUDO_CONTAINS, |
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431 SelectorPattern |
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432 ), |
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433 ("pseudo_nth_child", (':nth-child', ':nth-last-child'), PAT_PSEUDO_NTH_CHILD, SelectorPattern), |
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434 ("pseudo_nth_type", (':nth-of-type', ':nth-last-of-type'), PAT_PSEUDO_NTH_TYPE, SelectorPattern), |
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435 ("pseudo_lang", (':lang',), PAT_PSEUDO_LANG, SelectorPattern), |
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436 ("pseudo_dir", (':dir',), PAT_PSEUDO_DIR, SelectorPattern) |
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437 ) |
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438 ), |
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439 SelectorPattern("pseudo_class_custom", PAT_PSEUDO_CLASS_CUSTOM), |
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440 SelectorPattern("pseudo_class", PAT_PSEUDO_CLASS), |
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441 SelectorPattern("pseudo_element", PAT_PSEUDO_ELEMENT), |
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442 SelectorPattern("at_rule", PAT_AT_RULE), |
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443 SelectorPattern("id", PAT_ID), |
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444 SelectorPattern("class", PAT_CLASS), |
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445 SelectorPattern("tag", PAT_TAG), |
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446 SelectorPattern("attribute", PAT_ATTR), |
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447 SelectorPattern("combine", PAT_COMBINE) |
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448 ) |
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449 |
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450 def __init__(self, selector, custom=None, flags=0): |
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451 """Initialize.""" |
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452 |
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453 self.pattern = selector.replace('\x00', '\ufffd') |
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454 self.flags = flags |
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455 self.debug = self.flags & util.DEBUG |
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456 self.custom = {} if custom is None else custom |
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457 |
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458 def parse_attribute_selector(self, sel, m, has_selector): |
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459 """Create attribute selector from the returned regex match.""" |
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460 |
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461 inverse = False |
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462 op = m.group('cmp') |
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463 case = util.lower(m.group('case')) if m.group('case') else None |
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464 ns = css_unescape(m.group('attr_ns')[:-1]) if m.group('attr_ns') else '' |
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465 attr = css_unescape(m.group('attr_name')) |
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466 is_type = False |
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467 pattern2 = None |
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468 |
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469 if case: |
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470 flags = re.I if case == 'i' else 0 |
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471 elif util.lower(attr) == 'type': |
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472 flags = re.I |
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473 is_type = True |
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474 else: |
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475 flags = 0 |
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476 |
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477 if op: |
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478 if m.group('value').startswith(('"', "'")): |
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479 value = css_unescape(m.group('value')[1:-1], True) |
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480 else: |
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481 value = css_unescape(m.group('value')) |
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482 else: |
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483 value = None |
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484 if not op: |
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485 # Attribute name |
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486 pattern = None |
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487 elif op.startswith('^'): |
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488 # Value start with |
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489 pattern = re.compile(r'^%s.*' % re.escape(value), flags) |
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490 elif op.startswith('$'): |
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491 # Value ends with |
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492 pattern = re.compile(r'.*?%s$' % re.escape(value), flags) |
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493 elif op.startswith('*'): |
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494 # Value contains |
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495 pattern = re.compile(r'.*?%s.*' % re.escape(value), flags) |
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496 elif op.startswith('~'): |
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497 # Value contains word within space separated list |
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498 # `~=` should match nothing if it is empty or contains whitespace, |
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499 # so if either of these cases is present, use `[^\s\S]` which cannot be matched. |
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500 value = r'[^\s\S]' if not value or RE_WS.search(value) else re.escape(value) |
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501 pattern = re.compile(r'.*?(?:(?<=^)|(?<=[ \t\r\n\f]))%s(?=(?:[ \t\r\n\f]|$)).*' % value, flags) |
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502 elif op.startswith('|'): |
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503 # Value starts with word in dash separated list |
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504 pattern = re.compile(r'^%s(?:-.*)?$' % re.escape(value), flags) |
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505 else: |
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506 # Value matches |
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507 pattern = re.compile(r'^%s$' % re.escape(value), flags) |
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508 if op.startswith('!'): |
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509 # Equivalent to `:not([attr=value])` |
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510 inverse = True |
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511 if is_type and pattern: |
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512 pattern2 = re.compile(pattern.pattern) |
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513 |
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514 # Append the attribute selector |
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515 sel_attr = ct.SelectorAttribute(attr, ns, pattern, pattern2) |
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516 if inverse: |
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517 # If we are using `!=`, we need to nest the pattern under a `:not()`. |
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518 sub_sel = _Selector() |
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519 sub_sel.attributes.append(sel_attr) |
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520 not_list = ct.SelectorList([sub_sel.freeze()], True, False) |
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521 sel.selectors.append(not_list) |
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522 else: |
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523 sel.attributes.append(sel_attr) |
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524 |
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525 has_selector = True |
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526 return has_selector |
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527 |
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528 def parse_tag_pattern(self, sel, m, has_selector): |
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529 """Parse tag pattern from regex match.""" |
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530 |
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531 prefix = css_unescape(m.group('tag_ns')[:-1]) if m.group('tag_ns') else None |
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532 tag = css_unescape(m.group('tag_name')) |
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533 sel.tag = ct.SelectorTag(tag, prefix) |
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534 has_selector = True |
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535 return has_selector |
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536 |
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537 def parse_pseudo_class_custom(self, sel, m, has_selector): |
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538 """ |
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539 Parse custom pseudo class alias. |
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540 |
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541 Compile custom selectors as we need them. When compiling a custom selector, |
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542 set it to `None` in the dictionary so we can avoid an infinite loop. |
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543 """ |
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544 |
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545 pseudo = util.lower(css_unescape(m.group('name'))) |
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546 selector = self.custom.get(pseudo) |
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547 if selector is None: |
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548 raise SelectorSyntaxError( |
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549 "Undefined custom selector '{}' found at postion {}".format(pseudo, m.end(0)), |
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550 self.pattern, |
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551 m.end(0) |
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552 ) |
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553 |
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554 if not isinstance(selector, ct.SelectorList): |
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555 self.custom[pseudo] = None |
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556 selector = CSSParser( |
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557 selector, custom=self.custom, flags=self.flags |
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558 ).process_selectors(flags=FLG_PSEUDO) |
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559 self.custom[pseudo] = selector |
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560 |
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561 sel.selectors.append(selector) |
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562 has_selector = True |
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563 return has_selector |
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564 |
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565 def parse_pseudo_class(self, sel, m, has_selector, iselector, is_html): |
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566 """Parse pseudo class.""" |
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567 |
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568 complex_pseudo = False |
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569 pseudo = util.lower(css_unescape(m.group('name'))) |
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570 if m.group('open'): |
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571 complex_pseudo = True |
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572 if complex_pseudo and pseudo in PSEUDO_COMPLEX: |
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573 has_selector = self.parse_pseudo_open(sel, pseudo, has_selector, iselector, m.end(0)) |
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574 elif not complex_pseudo and pseudo in PSEUDO_SIMPLE: |
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575 if pseudo == ':root': |
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576 sel.flags |= ct.SEL_ROOT |
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577 elif pseudo == ':defined': |
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578 sel.flags |= ct.SEL_DEFINED |
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579 is_html = True |
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580 elif pseudo == ':scope': |
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581 sel.flags |= ct.SEL_SCOPE |
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582 elif pseudo == ':empty': |
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583 sel.flags |= ct.SEL_EMPTY |
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584 elif pseudo in (':link', ':any-link'): |
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585 sel.selectors.append(CSS_LINK) |
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586 elif pseudo == ':checked': |
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587 sel.selectors.append(CSS_CHECKED) |
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588 elif pseudo == ':default': |
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589 sel.selectors.append(CSS_DEFAULT) |
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590 elif pseudo == ':indeterminate': |
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591 sel.selectors.append(CSS_INDETERMINATE) |
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592 elif pseudo == ":disabled": |
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593 sel.selectors.append(CSS_DISABLED) |
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594 elif pseudo == ":enabled": |
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595 sel.selectors.append(CSS_ENABLED) |
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596 elif pseudo == ":required": |
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597 sel.selectors.append(CSS_REQUIRED) |
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598 elif pseudo == ":optional": |
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599 sel.selectors.append(CSS_OPTIONAL) |
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600 elif pseudo == ":read-only": |
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601 sel.selectors.append(CSS_READ_ONLY) |
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602 elif pseudo == ":read-write": |
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603 sel.selectors.append(CSS_READ_WRITE) |
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604 elif pseudo == ":in-range": |
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605 sel.selectors.append(CSS_IN_RANGE) |
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606 elif pseudo == ":out-of-range": |
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607 sel.selectors.append(CSS_OUT_OF_RANGE) |
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608 elif pseudo == ":placeholder-shown": |
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609 sel.selectors.append(CSS_PLACEHOLDER_SHOWN) |
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610 elif pseudo == ':first-child': |
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611 sel.nth.append(ct.SelectorNth(1, False, 0, False, False, ct.SelectorList())) |
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612 elif pseudo == ':last-child': |
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613 sel.nth.append(ct.SelectorNth(1, False, 0, False, True, ct.SelectorList())) |
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614 elif pseudo == ':first-of-type': |
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615 sel.nth.append(ct.SelectorNth(1, False, 0, True, False, ct.SelectorList())) |
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616 elif pseudo == ':last-of-type': |
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617 sel.nth.append(ct.SelectorNth(1, False, 0, True, True, ct.SelectorList())) |
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618 elif pseudo == ':only-child': |
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619 sel.nth.extend( |
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620 [ |
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621 ct.SelectorNth(1, False, 0, False, False, ct.SelectorList()), |
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622 ct.SelectorNth(1, False, 0, False, True, ct.SelectorList()) |
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623 ] |
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624 ) |
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625 elif pseudo == ':only-of-type': |
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626 sel.nth.extend( |
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627 [ |
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628 ct.SelectorNth(1, False, 0, True, False, ct.SelectorList()), |
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629 ct.SelectorNth(1, False, 0, True, True, ct.SelectorList()) |
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630 ] |
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631 ) |
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632 has_selector = True |
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633 elif complex_pseudo and pseudo in PSEUDO_COMPLEX_NO_MATCH: |
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634 self.parse_selectors(iselector, m.end(0), FLG_PSEUDO | FLG_OPEN) |
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635 sel.no_match = True |
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636 has_selector = True |
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637 elif not complex_pseudo and pseudo in PSEUDO_SIMPLE_NO_MATCH: |
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638 sel.no_match = True |
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639 has_selector = True |
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640 elif pseudo in PSEUDO_SUPPORTED: |
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641 raise SelectorSyntaxError( |
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642 "Invalid syntax for pseudo class '{}'".format(pseudo), |
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643 self.pattern, |
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644 m.start(0) |
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645 ) |
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646 else: |
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647 raise NotImplementedError( |
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648 "'{}' pseudo-class is not implemented at this time".format(pseudo) |
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649 ) |
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650 |
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651 return has_selector, is_html |
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652 |
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653 def parse_pseudo_nth(self, sel, m, has_selector, iselector): |
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654 """Parse `nth` pseudo.""" |
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655 |
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656 mdict = m.groupdict() |
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657 if mdict.get('pseudo_nth_child'): |
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658 postfix = '_child' |
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659 else: |
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660 postfix = '_type' |
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661 mdict['name'] = util.lower(css_unescape(mdict['name'])) |
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662 content = util.lower(mdict.get('nth' + postfix)) |
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663 if content == 'even': |
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664 # 2n |
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665 s1 = 2 |
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666 s2 = 0 |
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667 var = True |
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668 elif content == 'odd': |
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669 # 2n+1 |
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670 s1 = 2 |
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671 s2 = 1 |
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672 var = True |
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673 else: |
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674 nth_parts = RE_NTH.match(content) |
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675 s1 = '-' if nth_parts.group('s1') and nth_parts.group('s1') == '-' else '' |
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676 a = nth_parts.group('a') |
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677 var = a.endswith('n') |
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678 if a.startswith('n'): |
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679 s1 += '1' |
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680 elif var: |
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681 s1 += a[:-1] |
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682 else: |
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683 s1 += a |
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684 s2 = '-' if nth_parts.group('s2') and nth_parts.group('s2') == '-' else '' |
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685 if nth_parts.group('b'): |
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686 s2 += nth_parts.group('b') |
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687 else: |
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688 s2 = '0' |
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689 s1 = int(s1, 10) |
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690 s2 = int(s2, 10) |
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691 |
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692 pseudo_sel = mdict['name'] |
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693 if postfix == '_child': |
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694 if m.group('of'): |
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695 # Parse the rest of `of S`. |
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696 nth_sel = self.parse_selectors(iselector, m.end(0), FLG_PSEUDO | FLG_OPEN) |
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697 else: |
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698 # Use default `*|*` for `of S`. |
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699 nth_sel = CSS_NTH_OF_S_DEFAULT |
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700 if pseudo_sel == ':nth-child': |
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701 sel.nth.append(ct.SelectorNth(s1, var, s2, False, False, nth_sel)) |
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702 elif pseudo_sel == ':nth-last-child': |
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703 sel.nth.append(ct.SelectorNth(s1, var, s2, False, True, nth_sel)) |
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704 else: |
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705 if pseudo_sel == ':nth-of-type': |
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706 sel.nth.append(ct.SelectorNth(s1, var, s2, True, False, ct.SelectorList())) |
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707 elif pseudo_sel == ':nth-last-of-type': |
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708 sel.nth.append(ct.SelectorNth(s1, var, s2, True, True, ct.SelectorList())) |
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709 has_selector = True |
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710 return has_selector |
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711 |
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712 def parse_pseudo_open(self, sel, name, has_selector, iselector, index): |
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713 """Parse pseudo with opening bracket.""" |
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714 |
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715 flags = FLG_PSEUDO | FLG_OPEN |
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716 if name == ':not': |
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717 flags |= FLG_NOT |
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718 if name == ':has': |
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719 flags |= FLG_RELATIVE |
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720 |
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721 sel.selectors.append(self.parse_selectors(iselector, index, flags)) |
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722 has_selector = True |
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723 return has_selector |
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724 |
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725 def parse_has_combinator(self, sel, m, has_selector, selectors, rel_type, index): |
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726 """Parse combinator tokens.""" |
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727 |
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728 combinator = m.group('relation').strip() |
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729 if not combinator: |
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730 combinator = WS_COMBINATOR |
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731 if combinator == COMMA_COMBINATOR: |
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732 if not has_selector: |
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733 # If we've not captured any selector parts, the comma is either at the beginning of the pattern |
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734 # or following another comma, both of which are unexpected. Commas must split selectors. |
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735 raise SelectorSyntaxError( |
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736 "The combinator '{}' at postion {}, must have a selector before it".format(combinator, index), |
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737 self.pattern, |
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738 index |
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739 ) |
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740 sel.rel_type = rel_type |
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741 selectors[-1].relations.append(sel) |
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742 rel_type = ":" + WS_COMBINATOR |
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743 selectors.append(_Selector()) |
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744 else: |
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745 if has_selector: |
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746 # End the current selector and associate the leading combinator with this selector. |
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747 sel.rel_type = rel_type |
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748 selectors[-1].relations.append(sel) |
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749 elif rel_type[1:] != WS_COMBINATOR: |
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750 # It's impossible to have two whitespace combinators after each other as the patterns |
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751 # will gobble up trailing whitespace. It is also impossible to have a whitespace |
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752 # combinator after any other kind for the same reason. But we could have |
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753 # multiple non-whitespace combinators. So if the current combinator is not a whitespace, |
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754 # then we've hit the multiple combinator case, so we should fail. |
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755 raise SelectorSyntaxError( |
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756 'The multiple combinators at position {}'.format(index), |
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757 self.pattern, |
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758 index |
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759 ) |
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760 # Set the leading combinator for the next selector. |
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761 rel_type = ':' + combinator |
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762 sel = _Selector() |
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763 |
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764 has_selector = False |
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765 return has_selector, sel, rel_type |
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766 |
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767 def parse_combinator(self, sel, m, has_selector, selectors, relations, is_pseudo, index): |
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768 """Parse combinator tokens.""" |
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769 |
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770 combinator = m.group('relation').strip() |
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771 if not combinator: |
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772 combinator = WS_COMBINATOR |
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773 if not has_selector: |
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774 raise SelectorSyntaxError( |
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775 "The combinator '{}' at postion {}, must have a selector before it".format(combinator, index), |
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|
776 self.pattern, |
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|
777 index |
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|
778 ) |
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779 |
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780 if combinator == COMMA_COMBINATOR: |
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781 if not sel.tag and not is_pseudo: |
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782 # Implied `*` |
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783 sel.tag = ct.SelectorTag('*', None) |
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784 sel.relations.extend(relations) |
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785 selectors.append(sel) |
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786 del relations[:] |
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787 else: |
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788 sel.relations.extend(relations) |
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789 sel.rel_type = combinator |
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790 del relations[:] |
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791 relations.append(sel) |
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792 sel = _Selector() |
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793 |
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794 has_selector = False |
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795 return has_selector, sel |
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796 |
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797 def parse_class_id(self, sel, m, has_selector): |
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798 """Parse HTML classes and ids.""" |
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799 |
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800 selector = m.group(0) |
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801 if selector.startswith('.'): |
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802 sel.classes.append(css_unescape(selector[1:])) |
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803 else: |
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804 sel.ids.append(css_unescape(selector[1:])) |
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805 has_selector = True |
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806 return has_selector |
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807 |
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808 def parse_pseudo_contains(self, sel, m, has_selector): |
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809 """Parse contains.""" |
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810 |
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811 pseudo = util.lower(css_unescape(m.group('name'))) |
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812 if pseudo == ":contains": |
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813 warnings.warn( |
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814 "The pseudo class ':contains' is deprecated, ':-soup-contains' should be used moving forward.", |
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815 FutureWarning |
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|
816 ) |
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817 contains_own = pseudo == ":-soup-contains-own" |
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818 values = css_unescape(m.group('values')) |
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819 patterns = [] |
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820 for token in RE_VALUES.finditer(values): |
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821 if token.group('split'): |
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822 continue |
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823 value = token.group('value') |
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824 if value.startswith(("'", '"')): |
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825 value = css_unescape(value[1:-1], True) |
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826 else: |
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827 value = css_unescape(value) |
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828 patterns.append(value) |
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829 sel.contains.append(ct.SelectorContains(tuple(patterns), contains_own)) |
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830 has_selector = True |
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831 return has_selector |
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832 |
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833 def parse_pseudo_lang(self, sel, m, has_selector): |
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834 """Parse pseudo language.""" |
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835 |
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836 values = m.group('values') |
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837 patterns = [] |
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838 for token in RE_VALUES.finditer(values): |
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839 if token.group('split'): |
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840 continue |
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841 value = token.group('value') |
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842 if value.startswith(('"', "'")): |
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843 value = css_unescape(value[1:-1], True) |
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844 else: |
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845 value = css_unescape(value) |
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846 |
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847 patterns.append(value) |
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|
848 |
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849 sel.lang.append(ct.SelectorLang(patterns)) |
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850 has_selector = True |
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851 |
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852 return has_selector |
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|
853 |
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854 def parse_pseudo_dir(self, sel, m, has_selector): |
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855 """Parse pseudo direction.""" |
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856 |
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|
857 value = ct.SEL_DIR_LTR if util.lower(m.group('dir')) == 'ltr' else ct.SEL_DIR_RTL |
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858 sel.flags |= value |
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859 has_selector = True |
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860 return has_selector |
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|
861 |
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862 def parse_selectors(self, iselector, index=0, flags=0): |
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863 """Parse selectors.""" |
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864 |
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865 sel = _Selector() |
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866 selectors = [] |
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867 has_selector = False |
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868 closed = False |
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869 relations = [] |
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870 rel_type = ":" + WS_COMBINATOR |
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871 is_open = bool(flags & FLG_OPEN) |
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872 is_pseudo = bool(flags & FLG_PSEUDO) |
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873 is_relative = bool(flags & FLG_RELATIVE) |
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874 is_not = bool(flags & FLG_NOT) |
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875 is_html = bool(flags & FLG_HTML) |
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876 is_default = bool(flags & FLG_DEFAULT) |
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877 is_indeterminate = bool(flags & FLG_INDETERMINATE) |
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878 is_in_range = bool(flags & FLG_IN_RANGE) |
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879 is_out_of_range = bool(flags & FLG_OUT_OF_RANGE) |
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880 is_placeholder_shown = bool(flags & FLG_PLACEHOLDER_SHOWN) |
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881 |
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882 if self.debug: # pragma: no cover |
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883 if is_pseudo: |
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884 print(' is_pseudo: True') |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
885 if is_open: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
886 print(' is_open: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
887 if is_relative: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
888 print(' is_relative: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
889 if is_not: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
890 print(' is_not: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
891 if is_html: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
892 print(' is_html: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
893 if is_default: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
894 print(' is_default: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
895 if is_indeterminate: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
896 print(' is_indeterminate: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
897 if is_in_range: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
898 print(' is_in_range: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
899 if is_out_of_range: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
900 print(' is_out_of_range: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
901 if is_placeholder_shown: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
902 print(' is_placeholder_shown: True') |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
903 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
904 if is_relative: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
905 selectors.append(_Selector()) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
906 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
907 try: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
908 while True: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
909 key, m = next(iselector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
910 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
911 # Handle parts |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
912 if key == "at_rule": |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
913 raise NotImplementedError("At-rules found at position {}".format(m.start(0))) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
914 elif key == 'pseudo_class_custom': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
915 has_selector = self.parse_pseudo_class_custom(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
916 elif key == 'pseudo_class': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
917 has_selector, is_html = self.parse_pseudo_class(sel, m, has_selector, iselector, is_html) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
918 elif key == 'pseudo_element': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
919 raise NotImplementedError("Pseudo-element found at position {}".format(m.start(0))) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
920 elif key == 'pseudo_contains': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
921 has_selector = self.parse_pseudo_contains(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
922 elif key in ('pseudo_nth_type', 'pseudo_nth_child'): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
923 has_selector = self.parse_pseudo_nth(sel, m, has_selector, iselector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
924 elif key == 'pseudo_lang': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
925 has_selector = self.parse_pseudo_lang(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
926 elif key == 'pseudo_dir': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
927 has_selector = self.parse_pseudo_dir(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
928 # Currently only supports HTML |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
929 is_html = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
930 elif key == 'pseudo_close': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
931 if not has_selector: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
932 raise SelectorSyntaxError( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
933 "Expected a selector at postion {}".format(m.start(0)), |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
934 self.pattern, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
935 m.start(0) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
936 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
937 if is_open: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
938 closed = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
939 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
940 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
941 raise SelectorSyntaxError( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
942 "Unmatched pseudo-class close at postion {}".format(m.start(0)), |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
943 self.pattern, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
944 m.start(0) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
945 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
946 elif key == 'combine': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
947 if is_relative: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
948 has_selector, sel, rel_type = self.parse_has_combinator( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
949 sel, m, has_selector, selectors, rel_type, index |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
950 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
951 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
952 has_selector, sel = self.parse_combinator( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
953 sel, m, has_selector, selectors, relations, is_pseudo, index |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
954 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
955 elif key == 'attribute': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
956 has_selector = self.parse_attribute_selector(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
957 elif key == 'tag': |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
958 if has_selector: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
959 raise SelectorSyntaxError( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
960 "Tag name found at position {} instead of at the start".format(m.start(0)), |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
961 self.pattern, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
962 m.start(0) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
963 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
964 has_selector = self.parse_tag_pattern(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
965 elif key in ('class', 'id'): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
966 has_selector = self.parse_class_id(sel, m, has_selector) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
967 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
968 index = m.end(0) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
969 except StopIteration: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
970 pass |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
971 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
972 if is_open and not closed: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
973 raise SelectorSyntaxError( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
974 "Unclosed pseudo-class at position {}".format(index), |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
975 self.pattern, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
976 index |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
977 ) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
978 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
979 if has_selector: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
980 if not sel.tag and not is_pseudo: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
981 # Implied `*` |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
982 sel.tag = ct.SelectorTag('*', None) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
983 if is_relative: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
984 sel.rel_type = rel_type |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
985 selectors[-1].relations.append(sel) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
986 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
987 sel.relations.extend(relations) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
988 del relations[:] |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
989 selectors.append(sel) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
990 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
991 # We will always need to finish a selector when `:has()` is used as it leads with combining. |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
992 raise SelectorSyntaxError( |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
993 'Expected a selector at position {}'.format(index), |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
994 self.pattern, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
995 index |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
996 ) |
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997 |
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998 # Some patterns require additional logic, such as default. We try to make these the |
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999 # last pattern, and append the appropriate flag to that selector which communicates |
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1000 # to the matcher what additional logic is required. |
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1001 if is_default: |
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1002 selectors[-1].flags = ct.SEL_DEFAULT |
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1003 if is_indeterminate: |
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1004 selectors[-1].flags = ct.SEL_INDETERMINATE |
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1005 if is_in_range: |
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1006 selectors[-1].flags = ct.SEL_IN_RANGE |
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1007 if is_out_of_range: |
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1008 selectors[-1].flags = ct.SEL_OUT_OF_RANGE |
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1009 if is_placeholder_shown: |
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1010 selectors[-1].flags = ct.SEL_PLACEHOLDER_SHOWN |
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1011 |
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1012 return ct.SelectorList([s.freeze() for s in selectors], is_not, is_html) |
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1013 |
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1014 def selector_iter(self, pattern): |
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1015 """Iterate selector tokens.""" |
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1016 |
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1017 # Ignore whitespace and comments at start and end of pattern |
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1018 m = RE_WS_BEGIN.search(pattern) |
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1019 index = m.end(0) if m else 0 |
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1020 m = RE_WS_END.search(pattern) |
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1021 end = (m.start(0) - 1) if m else (len(pattern) - 1) |
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1022 |
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1023 if self.debug: # pragma: no cover |
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1024 print('## PARSING: {!r}'.format(pattern)) |
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1025 while index <= end: |
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1026 m = None |
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1027 for v in self.css_tokens: |
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1028 m = v.match(pattern, index, self.flags) |
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1029 if m: |
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1030 name = v.get_name() |
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1031 if self.debug: # pragma: no cover |
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1032 print("TOKEN: '{}' --> {!r} at position {}".format(name, m.group(0), m.start(0))) |
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1033 index = m.end(0) |
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1034 yield name, m |
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1035 break |
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1036 if m is None: |
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1037 c = pattern[index] |
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1038 # If the character represents the start of one of the known selector types, |
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1039 # throw an exception mentioning that the known selector type is in error; |
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1040 # otherwise, report the invalid character. |
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1041 if c == '[': |
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1042 msg = "Malformed attribute selector at position {}".format(index) |
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1043 elif c == '.': |
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1044 msg = "Malformed class selector at position {}".format(index) |
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1045 elif c == '#': |
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1046 msg = "Malformed id selector at position {}".format(index) |
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1047 elif c == ':': |
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1048 msg = "Malformed pseudo-class selector at position {}".format(index) |
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1049 else: |
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1050 msg = "Invalid character {!r} position {}".format(c, index) |
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1051 raise SelectorSyntaxError(msg, self.pattern, index) |
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1052 if self.debug: # pragma: no cover |
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1053 print('## END PARSING') |
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1054 |
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1055 def process_selectors(self, index=0, flags=0): |
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1056 """Process selectors.""" |
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1057 |
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1058 return self.parse_selectors(self.selector_iter(self.pattern), index, flags) |
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1059 |
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1060 |
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1061 # Precompile CSS selector lists for pseudo-classes (additional logic may be required beyond the pattern) |
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1062 # A few patterns are order dependent as they use patterns previous compiled. |
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1063 |
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1064 # CSS pattern for `:link` and `:any-link` |
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1065 CSS_LINK = CSSParser( |
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1066 'html|*:is(a, area)[href]' |
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1067 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1068 # CSS pattern for `:checked` |
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1069 CSS_CHECKED = CSSParser( |
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1070 ''' |
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1071 html|*:is(input[type=checkbox], input[type=radio])[checked], html|option[selected] |
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1072 ''' |
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1073 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1074 # CSS pattern for `:default` (must compile CSS_CHECKED first) |
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1075 CSS_DEFAULT = CSSParser( |
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1076 ''' |
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1077 :checked, |
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1078 |
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1079 /* |
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1080 This pattern must be at the end. |
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1081 Special logic is applied to the last selector. |
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1082 */ |
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1083 html|form html|*:is(button, input)[type="submit"] |
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1084 ''' |
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1085 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML | FLG_DEFAULT) |
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1086 # CSS pattern for `:indeterminate` |
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1087 CSS_INDETERMINATE = CSSParser( |
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1088 ''' |
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1089 html|input[type="checkbox"][indeterminate], |
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1090 html|input[type="radio"]:is(:not([name]), [name=""]):not([checked]), |
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1091 html|progress:not([value]), |
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1092 |
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1093 /* |
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1094 This pattern must be at the end. |
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1095 Special logic is applied to the last selector. |
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1096 */ |
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1097 html|input[type="radio"][name]:not([name='']):not([checked]) |
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1098 ''' |
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1099 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML | FLG_INDETERMINATE) |
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1100 # CSS pattern for `:disabled` |
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1101 CSS_DISABLED = CSSParser( |
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1102 ''' |
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1103 html|*:is(input:not([type=hidden]), button, select, textarea, fieldset, optgroup, option, fieldset)[disabled], |
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1104 html|optgroup[disabled] > html|option, |
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1105 html|fieldset[disabled] > html|*:is(input:not([type=hidden]), button, select, textarea, fieldset), |
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1106 html|fieldset[disabled] > |
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1107 html|*:not(legend:nth-of-type(1)) html|*:is(input:not([type=hidden]), button, select, textarea, fieldset) |
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1108 ''' |
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1109 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1110 # CSS pattern for `:enabled` |
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1111 CSS_ENABLED = CSSParser( |
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1112 ''' |
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1113 html|*:is(input:not([type=hidden]), button, select, textarea, fieldset, optgroup, option, fieldset):not(:disabled) |
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1114 ''' |
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1115 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1116 # CSS pattern for `:required` |
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1117 CSS_REQUIRED = CSSParser( |
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1118 'html|*:is(input, textarea, select)[required]' |
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1119 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1120 # CSS pattern for `:optional` |
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1121 CSS_OPTIONAL = CSSParser( |
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1122 'html|*:is(input, textarea, select):not([required])' |
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1123 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1124 # CSS pattern for `:placeholder-shown` |
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1125 CSS_PLACEHOLDER_SHOWN = CSSParser( |
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1126 ''' |
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1127 html|input:is( |
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1128 :not([type]), |
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1129 [type=""], |
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1130 [type=text], |
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1131 [type=search], |
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1132 [type=url], |
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1133 [type=tel], |
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1134 [type=email], |
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1135 [type=password], |
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1136 [type=number] |
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1137 )[placeholder]:not([placeholder='']):is(:not([value]), [value=""]), |
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1138 html|textarea[placeholder]:not([placeholder='']) |
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1139 ''' |
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1140 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML | FLG_PLACEHOLDER_SHOWN) |
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1141 # CSS pattern default for `:nth-child` "of S" feature |
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1142 CSS_NTH_OF_S_DEFAULT = CSSParser( |
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1143 '*|*' |
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1144 ).process_selectors(flags=FLG_PSEUDO) |
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1145 # CSS pattern for `:read-write` (CSS_DISABLED must be compiled first) |
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1146 CSS_READ_WRITE = CSSParser( |
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1147 ''' |
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1148 html|*:is( |
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1149 textarea, |
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1150 input:is( |
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1151 :not([type]), |
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|
1152 [type=""], |
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1153 [type=text], |
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1154 [type=search], |
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1155 [type=url], |
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1156 [type=tel], |
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1157 [type=email], |
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1158 [type=number], |
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1159 [type=password], |
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1160 [type=date], |
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1161 [type=datetime-local], |
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1162 [type=month], |
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1163 [type=time], |
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1164 [type=week] |
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1165 ) |
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1166 ):not([readonly], :disabled), |
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1167 html|*:is([contenteditable=""], [contenteditable="true" i]) |
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1168 ''' |
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1169 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1170 # CSS pattern for `:read-only` |
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1171 CSS_READ_ONLY = CSSParser( |
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1172 ''' |
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1173 html|*:not(:read-write) |
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1174 ''' |
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1175 ).process_selectors(flags=FLG_PSEUDO | FLG_HTML) |
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1176 # CSS pattern for `:in-range` |
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1177 CSS_IN_RANGE = CSSParser( |
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1178 ''' |
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1179 html|input:is( |
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1180 [type="date"], |
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1181 [type="month"], |
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1182 [type="week"], |
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1183 [type="time"], |
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1184 [type="datetime-local"], |
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1185 [type="number"], |
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1186 [type="range"] |
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1187 ):is( |
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1188 [min], |
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1189 [max] |
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1190 ) |
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1191 ''' |
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1192 ).process_selectors(flags=FLG_PSEUDO | FLG_IN_RANGE | FLG_HTML) |
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1193 # CSS pattern for `:out-of-range` |
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1194 CSS_OUT_OF_RANGE = CSSParser( |
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1195 ''' |
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1196 html|input:is( |
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1197 [type="date"], |
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1198 [type="month"], |
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1199 [type="week"], |
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1200 [type="time"], |
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1201 [type="datetime-local"], |
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1202 [type="number"], |
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1203 [type="range"] |
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1204 ):is( |
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1205 [min], |
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1206 [max] |
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1207 ) |
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1208 ''' |
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1209 ).process_selectors(flags=FLG_PSEUDO | FLG_OUT_OF_RANGE | FLG_HTML) |