Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/soupsieve/css_match.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 matcher.""" |
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2 from datetime import datetime |
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3 from . import util |
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4 import re |
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5 from .import css_types as ct |
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6 import unicodedata |
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7 from collections.abc import Sequence |
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8 |
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9 import bs4 |
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10 |
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11 # Empty tag pattern (whitespace okay) |
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12 RE_NOT_EMPTY = re.compile('[^ \t\r\n\f]') |
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13 |
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14 RE_NOT_WS = re.compile('[^ \t\r\n\f]+') |
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15 |
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16 # Relationships |
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17 REL_PARENT = ' ' |
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18 REL_CLOSE_PARENT = '>' |
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19 REL_SIBLING = '~' |
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20 REL_CLOSE_SIBLING = '+' |
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21 |
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22 # Relationships for :has() (forward looking) |
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23 REL_HAS_PARENT = ': ' |
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24 REL_HAS_CLOSE_PARENT = ':>' |
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25 REL_HAS_SIBLING = ':~' |
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26 REL_HAS_CLOSE_SIBLING = ':+' |
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27 |
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28 NS_XHTML = 'http://www.w3.org/1999/xhtml' |
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29 NS_XML = 'http://www.w3.org/XML/1998/namespace' |
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30 |
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31 DIR_FLAGS = ct.SEL_DIR_LTR | ct.SEL_DIR_RTL |
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32 RANGES = ct.SEL_IN_RANGE | ct.SEL_OUT_OF_RANGE |
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33 |
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34 DIR_MAP = { |
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35 'ltr': ct.SEL_DIR_LTR, |
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36 'rtl': ct.SEL_DIR_RTL, |
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37 'auto': 0 |
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38 } |
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39 |
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40 RE_NUM = re.compile(r"^(?P<value>-?(?:[0-9]{1,}(\.[0-9]+)?|\.[0-9]+))$") |
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41 RE_TIME = re.compile(r'^(?P<hour>[0-9]{2}):(?P<minutes>[0-9]{2})$') |
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42 RE_MONTH = re.compile(r'^(?P<year>[0-9]{4,})-(?P<month>[0-9]{2})$') |
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43 RE_WEEK = re.compile(r'^(?P<year>[0-9]{4,})-W(?P<week>[0-9]{2})$') |
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44 RE_DATE = re.compile(r'^(?P<year>[0-9]{4,})-(?P<month>[0-9]{2})-(?P<day>[0-9]{2})$') |
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45 RE_DATETIME = re.compile( |
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46 r'^(?P<year>[0-9]{4,})-(?P<month>[0-9]{2})-(?P<day>[0-9]{2})T(?P<hour>[0-9]{2}):(?P<minutes>[0-9]{2})$' |
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47 ) |
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48 RE_WILD_STRIP = re.compile(r'(?:(?:-\*-)(?:\*(?:-|$))*|-\*$)') |
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49 |
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50 MONTHS_30 = (4, 6, 9, 11) # April, June, September, and November |
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51 FEB = 2 |
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52 SHORT_MONTH = 30 |
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53 LONG_MONTH = 31 |
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54 FEB_MONTH = 28 |
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55 FEB_LEAP_MONTH = 29 |
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56 DAYS_IN_WEEK = 7 |
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57 |
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58 |
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59 class _FakeParent(object): |
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60 """ |
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61 Fake parent class. |
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62 |
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63 When we have a fragment with no `BeautifulSoup` document object, |
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64 we can't evaluate `nth` selectors properly. Create a temporary |
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65 fake parent so we can traverse the root element as a child. |
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66 """ |
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67 |
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68 def __init__(self, element): |
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69 """Initialize.""" |
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70 |
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71 self.contents = [element] |
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72 |
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73 def __len__(self): |
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74 """Length.""" |
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75 |
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76 return len(self.contents) |
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77 |
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78 |
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79 class _DocumentNav(object): |
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80 """Navigate a Beautiful Soup document.""" |
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81 |
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82 @classmethod |
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83 def assert_valid_input(cls, tag): |
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84 """Check if valid input tag or document.""" |
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85 |
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86 # Fail on unexpected types. |
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87 if not cls.is_tag(tag): |
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88 raise TypeError("Expected a BeautifulSoup 'Tag', but instead recieved type {}".format(type(tag))) |
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89 |
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90 @staticmethod |
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91 def is_doc(obj): |
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92 """Is `BeautifulSoup` object.""" |
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93 return isinstance(obj, bs4.BeautifulSoup) |
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94 |
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95 @staticmethod |
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96 def is_tag(obj): |
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97 """Is tag.""" |
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98 return isinstance(obj, bs4.Tag) |
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99 |
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100 @staticmethod |
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101 def is_declaration(obj): # pragma: no cover |
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102 """Is declaration.""" |
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103 return isinstance(obj, bs4.Declaration) |
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104 |
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105 @staticmethod |
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106 def is_cdata(obj): |
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107 """Is CDATA.""" |
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108 return isinstance(obj, bs4.CData) |
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109 |
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110 @staticmethod |
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111 def is_processing_instruction(obj): # pragma: no cover |
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112 """Is processing instruction.""" |
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113 return isinstance(obj, bs4.ProcessingInstruction) |
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114 |
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115 @staticmethod |
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116 def is_navigable_string(obj): |
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117 """Is navigable string.""" |
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118 return isinstance(obj, bs4.NavigableString) |
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119 |
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120 @staticmethod |
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121 def is_special_string(obj): |
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122 """Is special string.""" |
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123 return isinstance(obj, (bs4.Comment, bs4.Declaration, bs4.CData, bs4.ProcessingInstruction, bs4.Doctype)) |
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124 |
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125 @classmethod |
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126 def is_content_string(cls, obj): |
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127 """Check if node is content string.""" |
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128 |
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129 return cls.is_navigable_string(obj) and not cls.is_special_string(obj) |
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130 |
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131 @staticmethod |
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132 def create_fake_parent(el): |
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133 """Create fake parent for a given element.""" |
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134 |
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135 return _FakeParent(el) |
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136 |
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137 @staticmethod |
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138 def is_xml_tree(el): |
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139 """Check if element (or document) is from a XML tree.""" |
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140 |
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141 return el._is_xml |
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142 |
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143 def is_iframe(self, el): |
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144 """Check if element is an `iframe`.""" |
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145 |
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146 return ((el.name if self.is_xml_tree(el) else util.lower(el.name)) == 'iframe') and self.is_html_tag(el) |
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147 |
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148 def is_root(self, el): |
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149 """ |
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150 Return whether element is a root element. |
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151 |
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152 We check that the element is the root of the tree (which we have already pre-calculated), |
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153 and we check if it is the root element under an `iframe`. |
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154 """ |
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155 |
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156 root = self.root and self.root is el |
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157 if not root: |
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158 parent = self.get_parent(el) |
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159 root = parent is not None and self.is_html and self.is_iframe(parent) |
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160 return root |
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161 |
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162 def get_contents(self, el, no_iframe=False): |
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163 """Get contents or contents in reverse.""" |
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164 if not no_iframe or not self.is_iframe(el): |
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165 for content in el.contents: |
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166 yield content |
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167 |
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168 def get_children(self, el, start=None, reverse=False, tags=True, no_iframe=False): |
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169 """Get children.""" |
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170 |
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171 if not no_iframe or not self.is_iframe(el): |
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172 last = len(el.contents) - 1 |
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173 if start is None: |
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174 index = last if reverse else 0 |
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175 else: |
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176 index = start |
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177 end = -1 if reverse else last + 1 |
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178 incr = -1 if reverse else 1 |
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179 |
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180 if 0 <= index <= last: |
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181 while index != end: |
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182 node = el.contents[index] |
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183 index += incr |
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184 if not tags or self.is_tag(node): |
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185 yield node |
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186 |
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187 def get_descendants(self, el, tags=True, no_iframe=False): |
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188 """Get descendants.""" |
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189 |
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190 if not no_iframe or not self.is_iframe(el): |
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191 next_good = None |
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192 for child in el.descendants: |
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193 |
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194 if next_good is not None: |
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195 if child is not next_good: |
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196 continue |
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197 next_good = None |
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198 |
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199 is_tag = self.is_tag(child) |
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200 |
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201 if no_iframe and is_tag and self.is_iframe(child): |
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202 if child.next_sibling is not None: |
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203 next_good = child.next_sibling |
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204 else: |
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205 last_child = child |
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206 while self.is_tag(last_child) and last_child.contents: |
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207 last_child = last_child.contents[-1] |
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208 next_good = last_child.next_element |
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209 yield child |
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210 if next_good is None: |
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211 break |
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212 # Coverage isn't seeing this even though it's executed |
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213 continue # pragma: no cover |
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214 |
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215 if not tags or is_tag: |
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216 yield child |
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217 |
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218 def get_parent(self, el, no_iframe=False): |
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219 """Get parent.""" |
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220 |
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221 parent = el.parent |
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222 if no_iframe and parent is not None and self.is_iframe(parent): |
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223 parent = None |
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224 return parent |
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225 |
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226 @staticmethod |
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227 def get_tag_name(el): |
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228 """Get tag.""" |
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229 |
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230 return el.name |
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231 |
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232 @staticmethod |
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233 def get_prefix_name(el): |
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234 """Get prefix.""" |
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235 |
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236 return el.prefix |
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237 |
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238 @staticmethod |
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239 def get_uri(el): |
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240 """Get namespace `URI`.""" |
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241 |
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242 return el.namespace |
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243 |
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244 @classmethod |
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245 def get_next(cls, el, tags=True): |
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246 """Get next sibling tag.""" |
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247 |
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248 sibling = el.next_sibling |
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249 while tags and not cls.is_tag(sibling) and sibling is not None: |
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250 sibling = sibling.next_sibling |
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251 return sibling |
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252 |
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253 @classmethod |
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254 def get_previous(cls, el, tags=True): |
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255 """Get previous sibling tag.""" |
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256 |
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257 sibling = el.previous_sibling |
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258 while tags and not cls.is_tag(sibling) and sibling is not None: |
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259 sibling = sibling.previous_sibling |
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260 return sibling |
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261 |
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262 @staticmethod |
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263 def has_html_ns(el): |
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264 """ |
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265 Check if element has an HTML namespace. |
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266 |
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267 This is a bit different than whether a element is treated as having an HTML namespace, |
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268 like we do in the case of `is_html_tag`. |
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269 """ |
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270 |
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271 ns = getattr(el, 'namespace') if el else None |
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272 return ns and ns == NS_XHTML |
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273 |
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274 @staticmethod |
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275 def split_namespace(el, attr_name): |
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276 """Return namespace and attribute name without the prefix.""" |
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277 |
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278 return getattr(attr_name, 'namespace', None), getattr(attr_name, 'name', None) |
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279 |
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280 @classmethod |
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281 def normalize_value(cls, value): |
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282 """Normalize the value to be a string or list of strings.""" |
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283 |
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284 # Treat `None` as empty string. |
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285 if value is None: |
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286 return '' |
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287 |
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288 # Pass through strings |
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289 if (isinstance(value, str)): |
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290 return value |
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291 |
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292 # If it's a byte string, convert it to Unicode, treating it as UTF-8. |
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293 if isinstance(value, bytes): |
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294 return value.decode("utf8") |
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295 |
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296 # BeautifulSoup supports sequences of attribute values, so make sure the children are strings. |
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297 if isinstance(value, Sequence): |
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298 new_value = [] |
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299 for v in value: |
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300 if isinstance(v, Sequence): |
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301 # This is most certainly a user error and will crash and burn later, |
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302 # but to avoid excessive recursion, kick out now. |
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303 new_value.append(v) |
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304 else: |
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305 # Convert the child to a string |
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306 new_value.append(cls.normalize_value(v)) |
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307 return new_value |
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308 |
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309 # Try and make anything else a string |
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310 return str(value) |
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311 |
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312 @classmethod |
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313 def get_attribute_by_name(cls, el, name, default=None): |
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314 """Get attribute by name.""" |
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315 |
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316 value = default |
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317 if el._is_xml: |
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318 try: |
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319 value = cls.normalize_value(el.attrs[name]) |
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320 except KeyError: |
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321 pass |
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322 else: |
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323 for k, v in el.attrs.items(): |
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324 if util.lower(k) == name: |
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325 value = cls.normalize_value(v) |
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326 break |
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327 return value |
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328 |
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329 @classmethod |
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330 def iter_attributes(cls, el): |
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331 """Iterate attributes.""" |
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332 |
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333 for k, v in el.attrs.items(): |
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334 yield k, cls.normalize_value(v) |
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335 |
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336 @classmethod |
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337 def get_classes(cls, el): |
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338 """Get classes.""" |
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339 |
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340 classes = cls.get_attribute_by_name(el, 'class', []) |
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341 if isinstance(classes, str): |
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342 classes = RE_NOT_WS.findall(classes) |
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343 return classes |
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344 |
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345 def get_text(self, el, no_iframe=False): |
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346 """Get text.""" |
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347 |
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348 return ''.join( |
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349 [node for node in self.get_descendants(el, tags=False, no_iframe=no_iframe) if self.is_content_string(node)] |
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350 ) |
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351 |
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352 def get_own_text(self, el, no_iframe=False): |
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353 """Get Own Text.""" |
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354 |
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355 return [node for node in self.get_contents(el, no_iframe=no_iframe) if self.is_content_string(node)] |
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356 |
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357 |
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358 class Inputs(object): |
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359 """Class for parsing and validating input items.""" |
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360 |
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361 @staticmethod |
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362 def validate_day(year, month, day): |
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363 """Validate day.""" |
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364 |
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365 max_days = LONG_MONTH |
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366 if month == FEB: |
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367 max_days = FEB_LEAP_MONTH if ((year % 4 == 0) and (year % 100 != 0)) or (year % 400 == 0) else FEB_MONTH |
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368 elif month in MONTHS_30: |
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369 max_days = SHORT_MONTH |
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370 return 1 <= day <= max_days |
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371 |
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372 @staticmethod |
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373 def validate_week(year, week): |
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374 """Validate week.""" |
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375 |
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376 max_week = datetime.strptime("{}-{}-{}".format(12, 31, year), "%m-%d-%Y").isocalendar()[1] |
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377 if max_week == 1: |
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378 max_week = 53 |
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379 return 1 <= week <= max_week |
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380 |
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381 @staticmethod |
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382 def validate_month(month): |
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383 """Validate month.""" |
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384 |
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385 return 1 <= month <= 12 |
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386 |
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387 @staticmethod |
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388 def validate_year(year): |
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389 """Validate year.""" |
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390 |
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391 return 1 <= year |
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392 |
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393 @staticmethod |
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394 def validate_hour(hour): |
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395 """Validate hour.""" |
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396 |
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397 return 0 <= hour <= 23 |
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398 |
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399 @staticmethod |
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400 def validate_minutes(minutes): |
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401 """Validate minutes.""" |
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402 |
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403 return 0 <= minutes <= 59 |
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404 |
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405 @classmethod |
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406 def parse_value(cls, itype, value): |
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407 """Parse the input value.""" |
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408 |
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409 parsed = None |
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410 if itype == "date": |
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411 m = RE_DATE.match(value) |
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412 if m: |
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413 year = int(m.group('year'), 10) |
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414 month = int(m.group('month'), 10) |
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415 day = int(m.group('day'), 10) |
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416 if cls.validate_year(year) and cls.validate_month(month) and cls.validate_day(year, month, day): |
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417 parsed = (year, month, day) |
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418 elif itype == "month": |
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419 m = RE_MONTH.match(value) |
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420 if m: |
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421 year = int(m.group('year'), 10) |
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422 month = int(m.group('month'), 10) |
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423 if cls.validate_year(year) and cls.validate_month(month): |
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424 parsed = (year, month) |
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425 elif itype == "week": |
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426 m = RE_WEEK.match(value) |
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427 if m: |
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428 year = int(m.group('year'), 10) |
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429 week = int(m.group('week'), 10) |
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430 if cls.validate_year(year) and cls.validate_week(year, week): |
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431 parsed = (year, week) |
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432 elif itype == "time": |
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433 m = RE_TIME.match(value) |
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434 if m: |
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435 hour = int(m.group('hour'), 10) |
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436 minutes = int(m.group('minutes'), 10) |
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437 if cls.validate_hour(hour) and cls.validate_minutes(minutes): |
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438 parsed = (hour, minutes) |
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439 elif itype == "datetime-local": |
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440 m = RE_DATETIME.match(value) |
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441 if m: |
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442 year = int(m.group('year'), 10) |
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443 month = int(m.group('month'), 10) |
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444 day = int(m.group('day'), 10) |
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445 hour = int(m.group('hour'), 10) |
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446 minutes = int(m.group('minutes'), 10) |
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447 if ( |
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448 cls.validate_year(year) and cls.validate_month(month) and cls.validate_day(year, month, day) and |
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449 cls.validate_hour(hour) and cls.validate_minutes(minutes) |
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450 ): |
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451 parsed = (year, month, day, hour, minutes) |
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452 elif itype in ("number", "range"): |
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453 m = RE_NUM.match(value) |
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454 if m: |
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455 parsed = float(m.group('value')) |
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456 return parsed |
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457 |
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458 |
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459 class _Match(object): |
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460 """Perform CSS matching.""" |
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461 |
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462 def __init__(self, selectors, scope, namespaces, flags): |
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463 """Initialize.""" |
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464 |
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465 self.assert_valid_input(scope) |
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466 self.tag = scope |
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467 self.cached_meta_lang = [] |
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468 self.cached_default_forms = [] |
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469 self.cached_indeterminate_forms = [] |
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470 self.selectors = selectors |
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471 self.namespaces = {} if namespaces is None else namespaces |
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472 self.flags = flags |
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473 self.iframe_restrict = False |
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474 |
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475 # Find the root element for the whole tree |
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476 doc = scope |
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477 parent = self.get_parent(doc) |
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478 while parent: |
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479 doc = parent |
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480 parent = self.get_parent(doc) |
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481 root = None |
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482 if not self.is_doc(doc): |
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483 root = doc |
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484 else: |
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485 for child in self.get_children(doc): |
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486 root = child |
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487 break |
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488 |
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489 self.root = root |
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490 self.scope = scope if scope is not doc else root |
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491 self.has_html_namespace = self.has_html_ns(root) |
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492 |
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493 # A document can be both XML and HTML (XHTML) |
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494 self.is_xml = self.is_xml_tree(doc) |
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495 self.is_html = not self.is_xml or self.has_html_namespace |
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496 |
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497 def supports_namespaces(self): |
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498 """Check if namespaces are supported in the HTML type.""" |
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499 |
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500 return self.is_xml or self.has_html_namespace |
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501 |
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502 def get_tag_ns(self, el): |
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503 """Get tag namespace.""" |
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504 |
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505 if self.supports_namespaces(): |
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506 namespace = '' |
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507 ns = self.get_uri(el) |
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508 if ns: |
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509 namespace = ns |
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510 else: |
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511 namespace = NS_XHTML |
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512 return namespace |
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513 |
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514 def is_html_tag(self, el): |
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515 """Check if tag is in HTML namespace.""" |
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516 |
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517 return self.get_tag_ns(el) == NS_XHTML |
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518 |
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519 def get_tag(self, el): |
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520 """Get tag.""" |
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521 |
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522 name = self.get_tag_name(el) |
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523 return util.lower(name) if name is not None and not self.is_xml else name |
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524 |
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525 def get_prefix(self, el): |
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526 """Get prefix.""" |
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527 |
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528 prefix = self.get_prefix_name(el) |
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529 return util.lower(prefix) if prefix is not None and not self.is_xml else prefix |
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530 |
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531 def find_bidi(self, el): |
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532 """Get directionality from element text.""" |
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533 |
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534 for node in self.get_children(el, tags=False): |
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535 |
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536 # Analyze child text nodes |
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537 if self.is_tag(node): |
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538 |
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539 # Avoid analyzing certain elements specified in the specification. |
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540 direction = DIR_MAP.get(util.lower(self.get_attribute_by_name(node, 'dir', '')), None) |
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541 if ( |
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542 self.get_tag(node) in ('bdi', 'script', 'style', 'textarea', 'iframe') or |
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543 not self.is_html_tag(node) or |
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544 direction is not None |
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545 ): |
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546 continue # pragma: no cover |
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547 |
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548 # Check directionality of this node's text |
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549 value = self.find_bidi(node) |
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550 if value is not None: |
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551 return value |
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552 |
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553 # Direction could not be determined |
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554 continue # pragma: no cover |
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555 |
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556 # Skip `doctype` comments, etc. |
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557 if self.is_special_string(node): |
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558 continue |
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559 |
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560 # Analyze text nodes for directionality. |
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561 for c in node: |
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562 bidi = unicodedata.bidirectional(c) |
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563 if bidi in ('AL', 'R', 'L'): |
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564 return ct.SEL_DIR_LTR if bidi == 'L' else ct.SEL_DIR_RTL |
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565 return None |
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566 |
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567 def extended_language_filter(self, lang_range, lang_tag): |
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568 """Filter the language tags.""" |
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569 |
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570 match = True |
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571 lang_range = RE_WILD_STRIP.sub('-', lang_range).lower() |
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572 ranges = lang_range.split('-') |
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573 subtags = lang_tag.lower().split('-') |
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574 length = len(ranges) |
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575 rindex = 0 |
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576 sindex = 0 |
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577 r = ranges[rindex] |
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578 s = subtags[sindex] |
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579 |
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580 # Primary tag needs to match |
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581 if r != '*' and r != s: |
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582 match = False |
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583 |
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584 rindex += 1 |
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585 sindex += 1 |
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586 |
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587 # Match until we run out of ranges |
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588 while match and rindex < length: |
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589 r = ranges[rindex] |
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590 try: |
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591 s = subtags[sindex] |
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592 except IndexError: |
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593 # Ran out of subtags, |
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594 # but we still have ranges |
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595 match = False |
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596 continue |
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597 |
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598 # Empty range |
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599 if not r: |
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600 match = False |
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601 continue |
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602 |
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603 # Matched range |
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604 elif s == r: |
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605 rindex += 1 |
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606 |
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607 # Implicit wildcard cannot match |
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608 # singletons |
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609 elif len(s) == 1: |
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610 match = False |
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611 continue |
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612 |
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613 # Implicitly matched, so grab next subtag |
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614 sindex += 1 |
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615 |
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616 return match |
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617 |
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618 def match_attribute_name(self, el, attr, prefix): |
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619 """Match attribute name and return value if it exists.""" |
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620 |
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621 value = None |
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622 if self.supports_namespaces(): |
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623 value = None |
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624 # If we have not defined namespaces, we can't very well find them, so don't bother trying. |
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625 if prefix: |
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626 ns = self.namespaces.get(prefix) |
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627 if ns is None and prefix != '*': |
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628 return None |
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629 else: |
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630 ns = None |
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631 |
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632 for k, v in self.iter_attributes(el): |
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633 |
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634 # Get attribute parts |
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635 namespace, name = self.split_namespace(el, k) |
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636 |
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637 # Can't match a prefix attribute as we haven't specified one to match |
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638 # Try to match it normally as a whole `p:a` as selector may be trying `p\:a`. |
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639 if ns is None: |
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640 if (self.is_xml and attr == k) or (not self.is_xml and util.lower(attr) == util.lower(k)): |
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641 value = v |
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642 break |
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643 # Coverage is not finding this even though it is executed. |
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644 # Adding a print statement before this (and erasing coverage) causes coverage to find the line. |
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645 # Ignore the false positive message. |
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646 continue # pragma: no cover |
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647 |
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648 # We can't match our desired prefix attribute as the attribute doesn't have a prefix |
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649 if namespace is None or ns != namespace and prefix != '*': |
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650 continue |
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651 |
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652 # The attribute doesn't match. |
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653 if (util.lower(attr) != util.lower(name)) if not self.is_xml else (attr != name): |
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654 continue |
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655 |
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656 value = v |
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657 break |
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658 else: |
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659 for k, v in self.iter_attributes(el): |
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660 if util.lower(attr) != util.lower(k): |
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661 continue |
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662 value = v |
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663 break |
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664 return value |
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665 |
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666 def match_namespace(self, el, tag): |
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667 """Match the namespace of the element.""" |
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668 |
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669 match = True |
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670 namespace = self.get_tag_ns(el) |
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671 default_namespace = self.namespaces.get('') |
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672 tag_ns = '' if tag.prefix is None else self.namespaces.get(tag.prefix, None) |
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673 # We must match the default namespace if one is not provided |
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674 if tag.prefix is None and (default_namespace is not None and namespace != default_namespace): |
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675 match = False |
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676 # If we specified `|tag`, we must not have a namespace. |
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677 elif (tag.prefix is not None and tag.prefix == '' and namespace): |
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678 match = False |
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679 # Verify prefix matches |
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680 elif ( |
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681 tag.prefix and |
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682 tag.prefix != '*' and (tag_ns is None or namespace != tag_ns) |
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683 ): |
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684 match = False |
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685 return match |
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|
686 |
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|
687 def match_attributes(self, el, attributes): |
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|
688 """Match attributes.""" |
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|
689 |
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|
690 match = True |
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|
691 if attributes: |
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|
692 for a in attributes: |
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|
693 value = self.match_attribute_name(el, a.attribute, a.prefix) |
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|
694 pattern = a.xml_type_pattern if self.is_xml and a.xml_type_pattern else a.pattern |
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|
695 if isinstance(value, list): |
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|
696 value = ' '.join(value) |
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|
697 if value is None: |
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698 match = False |
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|
699 break |
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|
700 elif pattern is None: |
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|
701 continue |
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|
702 elif pattern.match(value) is None: |
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|
703 match = False |
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|
704 break |
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|
705 return match |
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|
706 |
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|
707 def match_tagname(self, el, tag): |
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|
708 """Match tag name.""" |
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|
709 |
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|
710 name = (util.lower(tag.name) if not self.is_xml and tag.name is not None else tag.name) |
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|
711 return not ( |
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|
712 name is not None and |
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|
713 name not in (self.get_tag(el), '*') |
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|
714 ) |
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|
715 |
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|
716 def match_tag(self, el, tag): |
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|
717 """Match the tag.""" |
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|
718 |
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|
719 match = True |
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|
720 if tag is not None: |
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|
721 # Verify namespace |
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|
722 if not self.match_namespace(el, tag): |
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723 match = False |
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|
724 if not self.match_tagname(el, tag): |
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|
725 match = False |
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|
726 return match |
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parents:
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|
727 |
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|
728 def match_past_relations(self, el, relation): |
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|
729 """Match past relationship.""" |
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|
730 |
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|
731 found = False |
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|
732 if relation[0].rel_type == REL_PARENT: |
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|
733 parent = self.get_parent(el, no_iframe=self.iframe_restrict) |
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|
734 while not found and parent: |
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|
735 found = self.match_selectors(parent, relation) |
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|
736 parent = self.get_parent(parent, no_iframe=self.iframe_restrict) |
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737 elif relation[0].rel_type == REL_CLOSE_PARENT: |
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738 parent = self.get_parent(el, no_iframe=self.iframe_restrict) |
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|
739 if parent: |
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740 found = self.match_selectors(parent, relation) |
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741 elif relation[0].rel_type == REL_SIBLING: |
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|
742 sibling = self.get_previous(el) |
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743 while not found and sibling: |
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744 found = self.match_selectors(sibling, relation) |
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|
745 sibling = self.get_previous(sibling) |
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746 elif relation[0].rel_type == REL_CLOSE_SIBLING: |
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747 sibling = self.get_previous(el) |
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748 if sibling and self.is_tag(sibling): |
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749 found = self.match_selectors(sibling, relation) |
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750 return found |
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|
751 |
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|
752 def match_future_child(self, parent, relation, recursive=False): |
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|
753 """Match future child.""" |
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parents:
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|
754 |
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parents:
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|
755 match = False |
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parents:
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|
756 children = self.get_descendants if recursive else self.get_children |
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shellac
parents:
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|
757 for child in children(parent, no_iframe=self.iframe_restrict): |
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parents:
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|
758 match = self.match_selectors(child, relation) |
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|
759 if match: |
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|
760 break |
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|
761 return match |
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parents:
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|
762 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
763 def match_future_relations(self, el, relation): |
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|
764 """Match future relationship.""" |
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parents:
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|
765 |
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parents:
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|
766 found = False |
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parents:
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|
767 if relation[0].rel_type == REL_HAS_PARENT: |
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shellac
parents:
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|
768 found = self.match_future_child(el, relation, True) |
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shellac
parents:
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|
769 elif relation[0].rel_type == REL_HAS_CLOSE_PARENT: |
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|
770 found = self.match_future_child(el, relation) |
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parents:
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|
771 elif relation[0].rel_type == REL_HAS_SIBLING: |
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parents:
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|
772 sibling = self.get_next(el) |
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parents:
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|
773 while not found and sibling: |
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|
774 found = self.match_selectors(sibling, relation) |
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parents:
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|
775 sibling = self.get_next(sibling) |
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parents:
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|
776 elif relation[0].rel_type == REL_HAS_CLOSE_SIBLING: |
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|
777 sibling = self.get_next(el) |
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shellac
parents:
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|
778 if sibling and self.is_tag(sibling): |
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parents:
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|
779 found = self.match_selectors(sibling, relation) |
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|
780 return found |
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parents:
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|
781 |
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|
782 def match_relations(self, el, relation): |
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shellac
parents:
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|
783 """Match relationship to other elements.""" |
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parents:
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|
784 |
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shellac
parents:
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|
785 found = False |
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parents:
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|
786 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
787 if relation[0].rel_type.startswith(':'): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
788 found = self.match_future_relations(el, relation) |
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parents:
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|
789 else: |
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parents:
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|
790 found = self.match_past_relations(el, relation) |
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parents:
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|
791 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
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|
792 return found |
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parents:
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|
793 |
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shellac
parents:
diff
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|
794 def match_id(self, el, ids): |
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shellac
parents:
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|
795 """Match element's ID.""" |
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parents:
diff
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|
796 |
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shellac
parents:
diff
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|
797 found = True |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
798 for i in ids: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
799 if i != self.get_attribute_by_name(el, 'id', ''): |
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|
800 found = False |
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|
801 break |
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|
802 return found |
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|
803 |
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parents:
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changeset
|
804 def match_classes(self, el, classes): |
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parents:
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|
805 """Match element's classes.""" |
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parents:
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|
806 |
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parents:
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|
807 current_classes = self.get_classes(el) |
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|
808 found = True |
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|
809 for c in classes: |
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|
810 if c not in current_classes: |
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|
811 found = False |
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|
812 break |
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|
813 return found |
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|
814 |
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parents:
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changeset
|
815 def match_root(self, el): |
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|
816 """Match element as root.""" |
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|
817 |
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|
818 is_root = self.is_root(el) |
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|
819 if is_root: |
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|
820 sibling = self.get_previous(el, tags=False) |
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|
821 while is_root and sibling is not None: |
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|
822 if ( |
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|
823 self.is_tag(sibling) or (self.is_content_string(sibling) and sibling.strip()) or |
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|
824 self.is_cdata(sibling) |
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|
825 ): |
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826 is_root = False |
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827 else: |
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parents:
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828 sibling = self.get_previous(sibling, tags=False) |
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parents:
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|
829 if is_root: |
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parents:
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|
830 sibling = self.get_next(el, tags=False) |
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|
831 while is_root and sibling is not None: |
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parents:
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|
832 if ( |
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changeset
|
833 self.is_tag(sibling) or (self.is_content_string(sibling) and sibling.strip()) or |
4f3585e2f14b
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parents:
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|
834 self.is_cdata(sibling) |
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|
835 ): |
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|
836 is_root = False |
4f3585e2f14b
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parents:
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|
837 else: |
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shellac
parents:
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changeset
|
838 sibling = self.get_next(sibling, tags=False) |
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shellac
parents:
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|
839 return is_root |
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parents:
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|
840 |
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parents:
diff
changeset
|
841 def match_scope(self, el): |
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parents:
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|
842 """Match element as scope.""" |
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parents:
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|
843 |
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shellac
parents:
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|
844 return self.scope is el |
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|
845 |
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shellac
parents:
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|
846 def match_nth_tag_type(self, el, child): |
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shellac
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|
847 """Match tag type for `nth` matches.""" |
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|
848 |
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|
849 return( |
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parents:
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|
850 (self.get_tag(child) == self.get_tag(el)) and |
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parents:
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|
851 (self.get_tag_ns(child) == self.get_tag_ns(el)) |
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|
852 ) |
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shellac
parents:
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changeset
|
853 |
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shellac
parents:
diff
changeset
|
854 def match_nth(self, el, nth): |
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shellac
parents:
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changeset
|
855 """Match `nth` elements.""" |
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shellac
parents:
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|
856 |
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parents:
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|
857 matched = True |
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parents:
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|
858 |
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shellac
parents:
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changeset
|
859 for n in nth: |
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shellac
parents:
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|
860 matched = False |
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shellac
parents:
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changeset
|
861 if n.selectors and not self.match_selectors(el, n.selectors): |
4f3585e2f14b
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parents:
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|
862 break |
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shellac
parents:
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changeset
|
863 parent = self.get_parent(el) |
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shellac
parents:
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changeset
|
864 if parent is None: |
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shellac
parents:
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changeset
|
865 parent = self.create_fake_parent(el) |
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shellac
parents:
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|
866 last = n.last |
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shellac
parents:
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|
867 last_index = len(parent) - 1 |
4f3585e2f14b
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shellac
parents:
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|
868 index = last_index if last else 0 |
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shellac
parents:
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|
869 relative_index = 0 |
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parents:
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|
870 a = n.a |
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shellac
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|
871 b = n.b |
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|
872 var = n.n |
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parents:
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|
873 count = 0 |
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parents:
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changeset
|
874 count_incr = 1 |
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shellac
parents:
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changeset
|
875 factor = -1 if last else 1 |
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shellac
parents:
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|
876 idx = last_idx = a * count + b if var else a |
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shellac
parents:
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|
877 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
878 # We can only adjust bounds within a variable index |
4f3585e2f14b
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shellac
parents:
diff
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|
879 if var: |
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shellac
parents:
diff
changeset
|
880 # Abort if our nth index is out of bounds and only getting further out of bounds as we increment. |
4f3585e2f14b
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shellac
parents:
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changeset
|
881 # Otherwise, increment to try to get in bounds. |
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shellac
parents:
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|
882 adjust = None |
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shellac
parents:
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|
883 while idx < 1 or idx > last_index: |
4f3585e2f14b
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shellac
parents:
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|
884 if idx < 0: |
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parents:
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|
885 diff_low = 0 - idx |
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shellac
parents:
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changeset
|
886 if adjust is not None and adjust == 1: |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
887 break |
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parents:
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|
888 adjust = -1 |
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parents:
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|
889 count += count_incr |
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shellac
parents:
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|
890 idx = last_idx = a * count + b if var else a |
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shellac
parents:
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|
891 diff = 0 - idx |
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shellac
parents:
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|
892 if diff >= diff_low: |
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parents:
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|
893 break |
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parents:
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|
894 else: |
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parents:
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|
895 diff_high = idx - last_index |
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shellac
parents:
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|
896 if adjust is not None and adjust == -1: |
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parents:
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|
897 break |
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parents:
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|
898 adjust = 1 |
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parents:
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|
899 count += count_incr |
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parents:
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|
900 idx = last_idx = a * count + b if var else a |
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shellac
parents:
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|
901 diff = idx - last_index |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
902 if diff >= diff_high: |
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shellac
parents:
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changeset
|
903 break |
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shellac
parents:
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|
904 diff_high = diff |
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shellac
parents:
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|
905 |
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shellac
parents:
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changeset
|
906 # If a < 0, our count is working backwards, so floor the index by increasing the count. |
4f3585e2f14b
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shellac
parents:
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|
907 # Find the count that yields the lowest, in bound value and use that. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
908 # Lastly reverse count increment so that we'll increase our index. |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
909 lowest = count |
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shellac
parents:
diff
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|
910 if a < 0: |
4f3585e2f14b
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parents:
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|
911 while idx >= 1: |
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parents:
diff
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|
912 lowest = count |
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shellac
parents:
diff
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|
913 count += count_incr |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
914 idx = last_idx = a * count + b if var else a |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
915 count_incr = -1 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
916 count = lowest |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
917 idx = last_idx = a * count + b if var else a |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
918 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
919 # Evaluate elements while our calculated nth index is still in range |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
920 while 1 <= idx <= last_index + 1: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
921 child = None |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
922 # Evaluate while our child index is still in range. |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
923 for child in self.get_children(parent, start=index, reverse=factor < 0, tags=False): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
924 index += factor |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
925 if not self.is_tag(child): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
926 continue |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
927 # Handle `of S` in `nth-child` |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
928 if n.selectors and not self.match_selectors(child, n.selectors): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
929 continue |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
930 # Handle `of-type` |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
931 if n.of_type and not self.match_nth_tag_type(el, child): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
932 continue |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
933 relative_index += 1 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
934 if relative_index == idx: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
935 if child is el: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
936 matched = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
937 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
938 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
939 if child is el: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
940 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
941 if child is el: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
942 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
943 last_idx = idx |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
944 count += count_incr |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
945 if count < 0: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
946 # Count is counting down and has now ventured into invalid territory. |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
947 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
948 idx = a * count + b if var else a |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
949 if last_idx == idx: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
950 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
951 if not matched: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
952 break |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
953 return matched |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
954 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
955 def match_empty(self, el): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
956 """Check if element is empty (if requested).""" |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
957 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
958 is_empty = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
959 for child in self.get_children(el, tags=False): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
960 if self.is_tag(child): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
961 is_empty = False |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
962 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
963 elif self.is_content_string(child) and RE_NOT_EMPTY.search(child): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
964 is_empty = False |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
965 break |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
966 return is_empty |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
967 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
968 def match_subselectors(self, el, selectors): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
969 """Match selectors.""" |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
970 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
971 match = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
972 for sel in selectors: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
973 if not self.match_selectors(el, sel): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
974 match = False |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
975 return match |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
976 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
977 def match_contains(self, el, contains): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
978 """Match element if it contains text.""" |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
979 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
980 match = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
981 content = None |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
982 for contain_list in contains: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
983 if content is None: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
984 if contain_list.own: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
985 content = self.get_own_text(el, no_iframe=self.is_html) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
986 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
987 content = self.get_text(el, no_iframe=self.is_html) |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
988 found = False |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
989 for text in contain_list.text: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
990 if contain_list.own: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
991 for c in content: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
992 if text in c: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
993 found = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
994 break |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
995 if found: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
996 break |
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shellac
parents:
diff
changeset
|
997 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
998 if text in content: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
999 found = True |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
1000 break |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1001 if not found: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1002 match = False |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1003 return match |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1004 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1005 def match_default(self, el): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1006 """Match default.""" |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1007 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1008 match = False |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
1009 |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1010 # Find this input's form |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1011 form = None |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1012 parent = self.get_parent(el, no_iframe=True) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1013 while parent and form is None: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1014 if self.get_tag(parent) == 'form' and self.is_html_tag(parent): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1015 form = parent |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1016 else: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1017 parent = self.get_parent(parent, no_iframe=True) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1018 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1019 # Look in form cache to see if we've already located its default button |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1020 found_form = False |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
1021 for f, t in self.cached_default_forms: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1022 if f is form: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1023 found_form = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1024 if t is el: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1025 match = True |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1026 break |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1027 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
1028 # We didn't have the form cached, so look for its default button |
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1029 if not found_form: |
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1030 for child in self.get_descendants(form, no_iframe=True): |
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1031 name = self.get_tag(child) |
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1032 # Can't do nested forms (haven't figured out why we never hit this) |
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1033 if name == 'form': # pragma: no cover |
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1034 break |
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1035 if name in ('input', 'button'): |
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1036 v = self.get_attribute_by_name(child, 'type', '') |
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1037 if v and util.lower(v) == 'submit': |
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1038 self.cached_default_forms.append([form, child]) |
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1039 if el is child: |
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1040 match = True |
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1041 break |
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1042 return match |
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1043 |
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1044 def match_indeterminate(self, el): |
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1045 """Match default.""" |
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1046 |
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1047 match = False |
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1048 name = self.get_attribute_by_name(el, 'name') |
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1049 |
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1050 def get_parent_form(el): |
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1051 """Find this input's form.""" |
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1052 form = None |
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1053 parent = self.get_parent(el, no_iframe=True) |
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1054 while form is None: |
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1055 if self.get_tag(parent) == 'form' and self.is_html_tag(parent): |
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1056 form = parent |
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1057 break |
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1058 last_parent = parent |
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1059 parent = self.get_parent(parent, no_iframe=True) |
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1060 if parent is None: |
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1061 form = last_parent |
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1062 break |
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1063 return form |
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1064 |
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1065 form = get_parent_form(el) |
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1066 |
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1067 # Look in form cache to see if we've already evaluated that its fellow radio buttons are indeterminate |
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1068 found_form = False |
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1069 for f, n, i in self.cached_indeterminate_forms: |
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1070 if f is form and n == name: |
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1071 found_form = True |
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1072 if i is True: |
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1073 match = True |
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1074 break |
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1075 |
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1076 # We didn't have the form cached, so validate that the radio button is indeterminate |
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1077 if not found_form: |
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1078 checked = False |
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1079 for child in self.get_descendants(form, no_iframe=True): |
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1080 if child is el: |
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1081 continue |
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1082 tag_name = self.get_tag(child) |
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1083 if tag_name == 'input': |
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1084 is_radio = False |
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1085 check = False |
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1086 has_name = False |
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1087 for k, v in self.iter_attributes(child): |
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1088 if util.lower(k) == 'type' and util.lower(v) == 'radio': |
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1089 is_radio = True |
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1090 elif util.lower(k) == 'name' and v == name: |
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1091 has_name = True |
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1092 elif util.lower(k) == 'checked': |
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1093 check = True |
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1094 if is_radio and check and has_name and get_parent_form(child) is form: |
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1095 checked = True |
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1096 break |
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1097 if checked: |
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1098 break |
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1099 if not checked: |
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1100 match = True |
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1101 self.cached_indeterminate_forms.append([form, name, match]) |
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1102 |
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1103 return match |
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1104 |
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1105 def match_lang(self, el, langs): |
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1106 """Match languages.""" |
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1107 |
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1108 match = False |
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1109 has_ns = self.supports_namespaces() |
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1110 root = self.root |
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1111 has_html_namespace = self.has_html_namespace |
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1112 |
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1113 # Walk parents looking for `lang` (HTML) or `xml:lang` XML property. |
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1114 parent = el |
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1115 found_lang = None |
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1116 last = None |
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1117 while not found_lang: |
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1118 has_html_ns = self.has_html_ns(parent) |
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1119 for k, v in self.iter_attributes(parent): |
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1120 attr_ns, attr = self.split_namespace(parent, k) |
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1121 if ( |
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1122 ((not has_ns or has_html_ns) and (util.lower(k) if not self.is_xml else k) == 'lang') or |
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1123 ( |
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1124 has_ns and not has_html_ns and attr_ns == NS_XML and |
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1125 (util.lower(attr) if not self.is_xml and attr is not None else attr) == 'lang' |
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1126 ) |
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1127 ): |
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1128 found_lang = v |
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1129 break |
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1130 last = parent |
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1131 parent = self.get_parent(parent, no_iframe=self.is_html) |
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1132 |
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1133 if parent is None: |
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1134 root = last |
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1135 has_html_namespace = self.has_html_ns(root) |
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1136 parent = last |
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1137 break |
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1138 |
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1139 # Use cached meta language. |
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1140 if not found_lang and self.cached_meta_lang: |
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parents:
diff
changeset
|
1141 for cache in self.cached_meta_lang: |
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parents:
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|
1142 if root is cache[0]: |
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parents:
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|
1143 found_lang = cache[1] |
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|
1144 |
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parents:
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changeset
|
1145 # If we couldn't find a language, and the document is HTML, look to meta to determine language. |
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parents:
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|
1146 if found_lang is None and (not self.is_xml or (has_html_namespace and root.name == 'html')): |
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parents:
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|
1147 # Find head |
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parents:
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|
1148 found = False |
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|
1149 for tag in ('html', 'head'): |
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|
1150 found = False |
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parents:
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|
1151 for child in self.get_children(parent, no_iframe=self.is_html): |
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parents:
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|
1152 if self.get_tag(child) == tag and self.is_html_tag(child): |
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parents:
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|
1153 found = True |
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parents:
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|
1154 parent = child |
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|
1155 break |
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|
1156 if not found: # pragma: no cover |
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|
1157 break |
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|
1158 |
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parents:
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changeset
|
1159 # Search meta tags |
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|
1160 if found: |
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|
1161 for child in parent: |
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|
1162 if self.is_tag(child) and self.get_tag(child) == 'meta' and self.is_html_tag(parent): |
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|
1163 c_lang = False |
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|
1164 content = None |
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|
1165 for k, v in self.iter_attributes(child): |
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|
1166 if util.lower(k) == 'http-equiv' and util.lower(v) == 'content-language': |
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1167 c_lang = True |
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1168 if util.lower(k) == 'content': |
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1169 content = v |
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1170 if c_lang and content: |
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1171 found_lang = content |
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1172 self.cached_meta_lang.append((root, found_lang)) |
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|
1173 break |
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|
1174 if found_lang: |
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|
1175 break |
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|
1176 if not found_lang: |
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1177 self.cached_meta_lang.append((root, False)) |
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1178 |
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changeset
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1179 # If we determined a language, compare. |
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1180 if found_lang: |
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1181 for patterns in langs: |
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1182 match = False |
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1183 for pattern in patterns: |
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1184 if self.extended_language_filter(pattern, found_lang): |
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1185 match = True |
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1186 if not match: |
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1187 break |
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1188 |
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1189 return match |
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|
1190 |
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1191 def match_dir(self, el, directionality): |
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1192 """Check directionality.""" |
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1193 |
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1194 # If we have to match both left and right, we can't match either. |
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|
1195 if directionality & ct.SEL_DIR_LTR and directionality & ct.SEL_DIR_RTL: |
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1196 return False |
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|
1197 |
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1198 if el is None or not self.is_html_tag(el): |
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1199 return False |
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parents:
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|
1200 |
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parents:
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|
1201 # Element has defined direction of left to right or right to left |
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1202 direction = DIR_MAP.get(util.lower(self.get_attribute_by_name(el, 'dir', '')), None) |
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1203 if direction not in (None, 0): |
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1204 return direction == directionality |
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|
1205 |
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1206 # Element is the document element (the root) and no direction assigned, assume left to right. |
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1207 is_root = self.is_root(el) |
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1208 if is_root and direction is None: |
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1209 return ct.SEL_DIR_LTR == directionality |
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parents:
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|
1210 |
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parents:
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|
1211 # If `input[type=telephone]` and no direction is assigned, assume left to right. |
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|
1212 name = self.get_tag(el) |
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|
1213 is_input = name == 'input' |
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1214 is_textarea = name == 'textarea' |
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parents:
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|
1215 is_bdi = name == 'bdi' |
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parents:
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|
1216 itype = util.lower(self.get_attribute_by_name(el, 'type', '')) if is_input else '' |
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shellac
parents:
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|
1217 if is_input and itype == 'tel' and direction is None: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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1218 return ct.SEL_DIR_LTR == directionality |
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parents:
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|
1219 |
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shellac
parents:
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changeset
|
1220 # Auto handling for text inputs |
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shellac
parents:
diff
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|
1221 if ((is_input and itype in ('text', 'search', 'tel', 'url', 'email')) or is_textarea) and direction == 0: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
1222 if is_textarea: |
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parents:
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|
1223 value = [] |
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shellac
parents:
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|
1224 for node in self.get_contents(el, no_iframe=True): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1225 if self.is_content_string(node): |
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parents:
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|
1226 value.append(node) |
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shellac
parents:
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|
1227 value = ''.join(value) |
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parents:
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|
1228 else: |
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parents:
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|
1229 value = self.get_attribute_by_name(el, 'value', '') |
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parents:
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|
1230 if value: |
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parents:
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changeset
|
1231 for c in value: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1232 bidi = unicodedata.bidirectional(c) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1233 if bidi in ('AL', 'R', 'L'): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
1234 direction = ct.SEL_DIR_LTR if bidi == 'L' else ct.SEL_DIR_RTL |
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shellac
parents:
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|
1235 return direction == directionality |
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shellac
parents:
diff
changeset
|
1236 # Assume left to right |
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shellac
parents:
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1237 return ct.SEL_DIR_LTR == directionality |
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shellac
parents:
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|
1238 elif is_root: |
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parents:
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1239 return ct.SEL_DIR_LTR == directionality |
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shellac
parents:
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|
1240 return self.match_dir(self.get_parent(el, no_iframe=True), directionality) |
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shellac
parents:
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|
1241 |
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shellac
parents:
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changeset
|
1242 # Auto handling for `bdi` and other non text inputs. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1243 if (is_bdi and direction is None) or direction == 0: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1244 direction = self.find_bidi(el) |
4f3585e2f14b
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shellac
parents:
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|
1245 if direction is not None: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
1246 return direction == directionality |
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shellac
parents:
diff
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|
1247 elif is_root: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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1248 return ct.SEL_DIR_LTR == directionality |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
1249 return self.match_dir(self.get_parent(el, no_iframe=True), directionality) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
1250 |
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1251 # Match parents direction |
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1252 return self.match_dir(self.get_parent(el, no_iframe=True), directionality) |
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1253 |
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1254 def match_range(self, el, condition): |
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1255 """ |
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1256 Match range. |
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1257 |
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1258 Behavior is modeled after what we see in browsers. Browsers seem to evaluate |
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1259 if the value is out of range, and if not, it is in range. So a missing value |
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1260 will not evaluate out of range; therefore, value is in range. Personally, I |
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1261 feel like this should evaluate as neither in or out of range. |
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1262 """ |
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1263 |
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1264 out_of_range = False |
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1265 |
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1266 itype = util.lower(self.get_attribute_by_name(el, 'type')) |
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1267 mn = self.get_attribute_by_name(el, 'min', None) |
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1268 if mn is not None: |
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1269 mn = Inputs.parse_value(itype, mn) |
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1270 mx = self.get_attribute_by_name(el, 'max', None) |
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1271 if mx is not None: |
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1272 mx = Inputs.parse_value(itype, mx) |
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1273 |
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1274 # There is no valid min or max, so we cannot evaluate a range |
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1275 if mn is None and mx is None: |
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1276 return False |
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1277 |
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1278 value = self.get_attribute_by_name(el, 'value', None) |
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1279 if value is not None: |
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1280 value = Inputs.parse_value(itype, value) |
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1281 if value is not None: |
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1282 if itype in ("date", "datetime-local", "month", "week", "number", "range"): |
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1283 if mn is not None and value < mn: |
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1284 out_of_range = True |
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1285 if not out_of_range and mx is not None and value > mx: |
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1286 out_of_range = True |
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1287 elif itype == "time": |
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1288 if mn is not None and mx is not None and mn > mx: |
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1289 # Time is periodic, so this is a reversed/discontinuous range |
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1290 if value < mn and value > mx: |
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1291 out_of_range = True |
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1292 else: |
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1293 if mn is not None and value < mn: |
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1294 out_of_range = True |
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1295 if not out_of_range and mx is not None and value > mx: |
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1296 out_of_range = True |
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1297 |
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1298 return not out_of_range if condition & ct.SEL_IN_RANGE else out_of_range |
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1299 |
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1300 def match_defined(self, el): |
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1301 """ |
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1302 Match defined. |
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1303 |
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1304 `:defined` is related to custom elements in a browser. |
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1305 |
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1306 - If the document is XML (not XHTML), all tags will match. |
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1307 - Tags that are not custom (don't have a hyphen) are marked defined. |
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1308 - If the tag has a prefix (without or without a namespace), it will not match. |
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1309 |
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1310 This is of course requires the parser to provide us with the proper prefix and namespace info, |
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1311 if it doesn't, there is nothing we can do. |
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1312 """ |
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1313 |
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1314 name = self.get_tag(el) |
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1315 return ( |
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1316 name.find('-') == -1 or |
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1317 name.find(':') != -1 or |
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1318 self.get_prefix(el) is not None |
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1319 ) |
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1320 |
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1321 def match_placeholder_shown(self, el): |
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1322 """ |
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1323 Match placeholder shown according to HTML spec. |
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1324 |
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1325 - text area should be checked if they have content. A single newline does not count as content. |
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1326 |
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1327 """ |
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1328 |
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1329 match = False |
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1330 content = self.get_text(el) |
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1331 if content in ('', '\n'): |
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1332 match = True |
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1333 |
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1334 return match |
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1335 |
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1336 def match_selectors(self, el, selectors): |
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1337 """Check if element matches one of the selectors.""" |
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1338 |
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1339 match = False |
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1340 is_not = selectors.is_not |
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1341 is_html = selectors.is_html |
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1342 |
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1343 # Internal selector lists that use the HTML flag, will automatically get the `html` namespace. |
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1344 if is_html: |
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1345 namespaces = self.namespaces |
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1346 iframe_restrict = self.iframe_restrict |
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1347 self.namespaces = {'html': NS_XHTML} |
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1348 self.iframe_restrict = True |
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1349 |
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1350 if not is_html or self.is_html: |
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1351 for selector in selectors: |
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1352 match = is_not |
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1353 # We have a un-matchable situation (like `:focus` as you can focus an element in this environment) |
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1354 if isinstance(selector, ct.SelectorNull): |
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1355 continue |
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1356 # Verify tag matches |
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1357 if not self.match_tag(el, selector.tag): |
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1358 continue |
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1359 # Verify tag is defined |
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1360 if selector.flags & ct.SEL_DEFINED and not self.match_defined(el): |
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1361 continue |
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1362 # Verify element is root |
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1363 if selector.flags & ct.SEL_ROOT and not self.match_root(el): |
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1364 continue |
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1365 # Verify element is scope |
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1366 if selector.flags & ct.SEL_SCOPE and not self.match_scope(el): |
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1367 continue |
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|
1368 # Verify element has placeholder shown |
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1369 if selector.flags & ct.SEL_PLACEHOLDER_SHOWN and not self.match_placeholder_shown(el): |
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1370 continue |
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1371 # Verify `nth` matches |
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1372 if not self.match_nth(el, selector.nth): |
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1373 continue |
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1374 if selector.flags & ct.SEL_EMPTY and not self.match_empty(el): |
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1375 continue |
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1376 # Verify id matches |
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1377 if selector.ids and not self.match_id(el, selector.ids): |
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1378 continue |
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1379 # Verify classes match |
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1380 if selector.classes and not self.match_classes(el, selector.classes): |
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1381 continue |
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1382 # Verify attribute(s) match |
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1383 if not self.match_attributes(el, selector.attributes): |
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1384 continue |
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1385 # Verify ranges |
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|
1386 if selector.flags & RANGES and not self.match_range(el, selector.flags & RANGES): |
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1387 continue |
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1388 # Verify language patterns |
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1389 if selector.lang and not self.match_lang(el, selector.lang): |
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1390 continue |
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1391 # Verify pseudo selector patterns |
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1392 if selector.selectors and not self.match_subselectors(el, selector.selectors): |
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1393 continue |
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1394 # Verify relationship selectors |
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1395 if selector.relation and not self.match_relations(el, selector.relation): |
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|
1396 continue |
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|
1397 # Validate that the current default selector match corresponds to the first submit button in the form |
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1398 if selector.flags & ct.SEL_DEFAULT and not self.match_default(el): |
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1399 continue |
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|
1400 # Validate that the unset radio button is among radio buttons with the same name in a form that are |
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1401 # also not set. |
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1402 if selector.flags & ct.SEL_INDETERMINATE and not self.match_indeterminate(el): |
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1403 continue |
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|
1404 # Validate element directionality |
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1405 if selector.flags & DIR_FLAGS and not self.match_dir(el, selector.flags & DIR_FLAGS): |
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1406 continue |
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|
1407 # Validate that the tag contains the specified text. |
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1408 if not self.match_contains(el, selector.contains): |
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1409 continue |
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1410 match = not is_not |
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1411 break |
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1412 |
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1413 # Restore actual namespaces being used for external selector lists |
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1414 if is_html: |
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1415 self.namespaces = namespaces |
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1416 self.iframe_restrict = iframe_restrict |
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1417 |
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1418 return match |
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1419 |
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1420 def select(self, limit=0): |
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1421 """Match all tags under the targeted tag.""" |
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1422 |
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1423 if limit < 1: |
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1424 limit = None |
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1425 |
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1426 for child in self.get_descendants(self.tag): |
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1427 if self.match(child): |
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1428 yield child |
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1429 if limit is not None: |
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1430 limit -= 1 |
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1431 if limit < 1: |
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1432 break |
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1433 |
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1434 def closest(self): |
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1435 """Match closest ancestor.""" |
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|
1436 |
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1437 current = self.tag |
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1438 closest = None |
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1439 while closest is None and current is not None: |
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1440 if self.match(current): |
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1441 closest = current |
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1442 else: |
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1443 current = self.get_parent(current) |
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1444 return closest |
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1445 |
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1446 def filter(self): # noqa A001 |
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1447 """Filter tag's children.""" |
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1448 |
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1449 return [tag for tag in self.get_contents(self.tag) if not self.is_navigable_string(tag) and self.match(tag)] |
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1450 |
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1451 def match(self, el): |
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1452 """Match.""" |
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1453 |
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1454 return not self.is_doc(el) and self.is_tag(el) and self.match_selectors(el, self.selectors) |
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1455 |
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1456 |
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1457 class CSSMatch(_DocumentNav, _Match): |
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1458 """The Beautiful Soup CSS match class.""" |
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1459 |
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1460 |
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1461 class SoupSieve(ct.Immutable): |
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1462 """Compiled Soup Sieve selector matching object.""" |
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1463 |
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|
1464 __slots__ = ("pattern", "selectors", "namespaces", "custom", "flags", "_hash") |
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1465 |
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1466 def __init__(self, pattern, selectors, namespaces, custom, flags): |
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1467 """Initialize.""" |
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1468 |
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1469 super(SoupSieve, self).__init__( |
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1470 pattern=pattern, |
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1471 selectors=selectors, |
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|
1472 namespaces=namespaces, |
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1473 custom=custom, |
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1474 flags=flags |
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1475 ) |
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1476 |
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1477 def match(self, tag): |
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1478 """Match.""" |
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1479 |
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1480 return CSSMatch(self.selectors, tag, self.namespaces, self.flags).match(tag) |
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1481 |
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1482 def closest(self, tag): |
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1483 """Match closest ancestor.""" |
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1484 |
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1485 return CSSMatch(self.selectors, tag, self.namespaces, self.flags).closest() |
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1486 |
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1487 def filter(self, iterable): # noqa A001 |
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1488 """ |
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1489 Filter. |
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1490 |
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1491 `CSSMatch` can cache certain searches for tags of the same document, |
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1492 so if we are given a tag, all tags are from the same document, |
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1493 and we can take advantage of the optimization. |
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1494 |
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1495 Any other kind of iterable could have tags from different documents or detached tags, |
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1496 so for those, we use a new `CSSMatch` for each item in the iterable. |
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1497 """ |
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1498 |
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1499 if CSSMatch.is_tag(iterable): |
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1500 return CSSMatch(self.selectors, iterable, self.namespaces, self.flags).filter() |
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1501 else: |
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1502 return [node for node in iterable if not CSSMatch.is_navigable_string(node) and self.match(node)] |
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1503 |
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1504 def select_one(self, tag): |
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1505 """Select a single tag.""" |
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1506 |
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1507 tags = self.select(tag, limit=1) |
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1508 return tags[0] if tags else None |
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1509 |
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1510 def select(self, tag, limit=0): |
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1511 """Select the specified tags.""" |
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1512 |
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1513 return list(self.iselect(tag, limit)) |
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1514 |
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1515 def iselect(self, tag, limit=0): |
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1516 """Iterate the specified tags.""" |
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1517 |
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1518 for el in CSSMatch(self.selectors, tag, self.namespaces, self.flags).select(limit): |
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1519 yield el |
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1520 |
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1521 def __repr__(self): # pragma: no cover |
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1522 """Representation.""" |
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1523 |
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1524 return "SoupSieve(pattern={!r}, namespaces={!r}, custom={!r}, flags={!r})".format( |
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1525 self.pattern, |
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1526 self.namespaces, |
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1527 self.custom, |
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1528 self.flags |
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1529 ) |
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1530 |
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1531 __str__ = __repr__ |
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1532 |
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1533 |
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1534 ct.pickle_register(SoupSieve) |