Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/bleach/_vendor/html5lib/treewalkers/etree_lxml.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 from __future__ import absolute_import, division, unicode_literals |
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2 from six import text_type |
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3 |
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4 from collections import OrderedDict |
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5 |
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6 from lxml import etree |
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7 from ..treebuilders.etree import tag_regexp |
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8 |
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9 from . import base |
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10 |
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11 from .. import _ihatexml |
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12 |
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13 |
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14 def ensure_str(s): |
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15 if s is None: |
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16 return None |
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17 elif isinstance(s, text_type): |
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18 return s |
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19 else: |
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20 return s.decode("ascii", "strict") |
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21 |
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22 |
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23 class Root(object): |
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24 def __init__(self, et): |
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25 self.elementtree = et |
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26 self.children = [] |
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27 |
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28 try: |
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29 if et.docinfo.internalDTD: |
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30 self.children.append(Doctype(self, |
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31 ensure_str(et.docinfo.root_name), |
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32 ensure_str(et.docinfo.public_id), |
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33 ensure_str(et.docinfo.system_url))) |
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34 except AttributeError: |
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35 pass |
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36 |
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37 try: |
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38 node = et.getroot() |
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39 except AttributeError: |
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40 node = et |
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41 |
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42 while node.getprevious() is not None: |
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43 node = node.getprevious() |
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44 while node is not None: |
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45 self.children.append(node) |
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46 node = node.getnext() |
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47 |
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48 self.text = None |
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49 self.tail = None |
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50 |
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51 def __getitem__(self, key): |
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52 return self.children[key] |
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53 |
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54 def getnext(self): |
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55 return None |
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56 |
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57 def __len__(self): |
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58 return 1 |
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59 |
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60 |
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61 class Doctype(object): |
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62 def __init__(self, root_node, name, public_id, system_id): |
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63 self.root_node = root_node |
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64 self.name = name |
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65 self.public_id = public_id |
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66 self.system_id = system_id |
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67 |
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68 self.text = None |
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69 self.tail = None |
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70 |
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71 def getnext(self): |
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72 return self.root_node.children[1] |
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73 |
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74 |
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75 class FragmentRoot(Root): |
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76 def __init__(self, children): |
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77 self.children = [FragmentWrapper(self, child) for child in children] |
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78 self.text = self.tail = None |
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79 |
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80 def getnext(self): |
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81 return None |
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82 |
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83 |
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84 class FragmentWrapper(object): |
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85 def __init__(self, fragment_root, obj): |
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86 self.root_node = fragment_root |
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87 self.obj = obj |
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88 if hasattr(self.obj, 'text'): |
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89 self.text = ensure_str(self.obj.text) |
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90 else: |
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91 self.text = None |
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92 if hasattr(self.obj, 'tail'): |
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93 self.tail = ensure_str(self.obj.tail) |
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94 else: |
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95 self.tail = None |
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96 |
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97 def __getattr__(self, name): |
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98 return getattr(self.obj, name) |
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99 |
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100 def getnext(self): |
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101 siblings = self.root_node.children |
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102 idx = siblings.index(self) |
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103 if idx < len(siblings) - 1: |
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104 return siblings[idx + 1] |
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105 else: |
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106 return None |
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107 |
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108 def __getitem__(self, key): |
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109 return self.obj[key] |
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110 |
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111 def __bool__(self): |
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112 return bool(self.obj) |
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113 |
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114 def getparent(self): |
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115 return None |
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116 |
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117 def __str__(self): |
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118 return str(self.obj) |
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119 |
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120 def __unicode__(self): |
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121 return str(self.obj) |
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122 |
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123 def __len__(self): |
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124 return len(self.obj) |
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125 |
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126 |
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127 class TreeWalker(base.NonRecursiveTreeWalker): |
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128 def __init__(self, tree): |
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129 # pylint:disable=redefined-variable-type |
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130 if isinstance(tree, list): |
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131 self.fragmentChildren = set(tree) |
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132 tree = FragmentRoot(tree) |
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133 else: |
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134 self.fragmentChildren = set() |
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135 tree = Root(tree) |
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136 base.NonRecursiveTreeWalker.__init__(self, tree) |
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137 self.filter = _ihatexml.InfosetFilter() |
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138 |
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139 def getNodeDetails(self, node): |
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140 if isinstance(node, tuple): # Text node |
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141 node, key = node |
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142 assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key |
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143 return base.TEXT, ensure_str(getattr(node, key)) |
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144 |
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145 elif isinstance(node, Root): |
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146 return (base.DOCUMENT,) |
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147 |
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148 elif isinstance(node, Doctype): |
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149 return base.DOCTYPE, node.name, node.public_id, node.system_id |
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150 |
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151 elif isinstance(node, FragmentWrapper) and not hasattr(node, "tag"): |
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152 return base.TEXT, ensure_str(node.obj) |
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153 |
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154 elif node.tag == etree.Comment: |
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155 return base.COMMENT, ensure_str(node.text) |
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156 |
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157 elif node.tag == etree.Entity: |
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158 return base.ENTITY, ensure_str(node.text)[1:-1] # strip &; |
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159 |
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160 else: |
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161 # This is assumed to be an ordinary element |
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162 match = tag_regexp.match(ensure_str(node.tag)) |
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163 if match: |
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164 namespace, tag = match.groups() |
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165 else: |
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166 namespace = None |
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167 tag = ensure_str(node.tag) |
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168 attrs = OrderedDict() |
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169 for name, value in list(node.attrib.items()): |
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170 name = ensure_str(name) |
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171 value = ensure_str(value) |
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172 match = tag_regexp.match(name) |
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173 if match: |
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174 attrs[(match.group(1), match.group(2))] = value |
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175 else: |
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176 attrs[(None, name)] = value |
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177 return (base.ELEMENT, namespace, self.filter.fromXmlName(tag), |
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178 attrs, len(node) > 0 or node.text) |
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179 |
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180 def getFirstChild(self, node): |
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181 assert not isinstance(node, tuple), "Text nodes have no children" |
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182 |
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183 assert len(node) or node.text, "Node has no children" |
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184 if node.text: |
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185 return (node, "text") |
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186 else: |
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187 return node[0] |
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188 |
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189 def getNextSibling(self, node): |
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190 if isinstance(node, tuple): # Text node |
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191 node, key = node |
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192 assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key |
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193 if key == "text": |
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194 # XXX: we cannot use a "bool(node) and node[0] or None" construct here |
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195 # because node[0] might evaluate to False if it has no child element |
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196 if len(node): |
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197 return node[0] |
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198 else: |
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199 return None |
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200 else: # tail |
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201 return node.getnext() |
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202 |
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203 return (node, "tail") if node.tail else node.getnext() |
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204 |
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205 def getParentNode(self, node): |
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206 if isinstance(node, tuple): # Text node |
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207 node, key = node |
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208 assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key |
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209 if key == "text": |
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210 return node |
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211 # else: fallback to "normal" processing |
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212 elif node in self.fragmentChildren: |
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213 return None |
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214 |
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215 return node.getparent() |