Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/bleach/_vendor/html5lib/treewalkers/etree.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 |
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3 from collections import OrderedDict |
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4 import re |
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5 |
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6 from six import string_types |
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7 |
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8 from . import base |
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9 from .._utils import moduleFactoryFactory |
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10 |
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11 tag_regexp = re.compile("{([^}]*)}(.*)") |
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12 |
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13 |
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14 def getETreeBuilder(ElementTreeImplementation): |
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15 ElementTree = ElementTreeImplementation |
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16 ElementTreeCommentType = ElementTree.Comment("asd").tag |
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17 |
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18 class TreeWalker(base.NonRecursiveTreeWalker): # pylint:disable=unused-variable |
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19 """Given the particular ElementTree representation, this implementation, |
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20 to avoid using recursion, returns "nodes" as tuples with the following |
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21 content: |
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22 |
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23 1. The current element |
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24 |
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25 2. The index of the element relative to its parent |
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26 |
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27 3. A stack of ancestor elements |
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28 |
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29 4. A flag "text", "tail" or None to indicate if the current node is a |
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30 text node; either the text or tail of the current element (1) |
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31 """ |
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32 def getNodeDetails(self, node): |
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33 if isinstance(node, tuple): # It might be the root Element |
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34 elt, _, _, flag = node |
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35 if flag in ("text", "tail"): |
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36 return base.TEXT, getattr(elt, flag) |
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37 else: |
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38 node = elt |
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39 |
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40 if not(hasattr(node, "tag")): |
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41 node = node.getroot() |
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42 |
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43 if node.tag in ("DOCUMENT_ROOT", "DOCUMENT_FRAGMENT"): |
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44 return (base.DOCUMENT,) |
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45 |
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46 elif node.tag == "<!DOCTYPE>": |
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47 return (base.DOCTYPE, node.text, |
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48 node.get("publicId"), node.get("systemId")) |
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49 |
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50 elif node.tag == ElementTreeCommentType: |
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51 return base.COMMENT, node.text |
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52 |
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53 else: |
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54 assert isinstance(node.tag, string_types), type(node.tag) |
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55 # This is assumed to be an ordinary element |
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56 match = tag_regexp.match(node.tag) |
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57 if match: |
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58 namespace, tag = match.groups() |
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59 else: |
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60 namespace = None |
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61 tag = node.tag |
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62 attrs = OrderedDict() |
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63 for name, value in list(node.attrib.items()): |
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64 match = tag_regexp.match(name) |
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65 if match: |
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66 attrs[(match.group(1), match.group(2))] = value |
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67 else: |
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68 attrs[(None, name)] = value |
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69 return (base.ELEMENT, namespace, tag, |
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70 attrs, len(node) or node.text) |
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71 |
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72 def getFirstChild(self, node): |
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73 if isinstance(node, tuple): |
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74 element, key, parents, flag = node |
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75 else: |
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76 element, key, parents, flag = node, None, [], None |
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77 |
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78 if flag in ("text", "tail"): |
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79 return None |
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80 else: |
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81 if element.text: |
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82 return element, key, parents, "text" |
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83 elif len(element): |
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84 parents.append(element) |
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85 return element[0], 0, parents, None |
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86 else: |
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87 return None |
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88 |
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89 def getNextSibling(self, node): |
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90 if isinstance(node, tuple): |
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91 element, key, parents, flag = node |
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92 else: |
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93 return None |
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94 |
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95 if flag == "text": |
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96 if len(element): |
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97 parents.append(element) |
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98 return element[0], 0, parents, None |
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99 else: |
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100 return None |
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101 else: |
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102 if element.tail and flag != "tail": |
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103 return element, key, parents, "tail" |
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104 elif key < len(parents[-1]) - 1: |
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105 return parents[-1][key + 1], key + 1, parents, None |
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106 else: |
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107 return None |
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108 |
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109 def getParentNode(self, node): |
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110 if isinstance(node, tuple): |
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111 element, key, parents, flag = node |
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112 else: |
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113 return None |
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114 |
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115 if flag == "text": |
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116 if not parents: |
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117 return element |
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118 else: |
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119 return element, key, parents, None |
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120 else: |
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121 parent = parents.pop() |
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122 if not parents: |
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123 return parent |
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124 else: |
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125 assert list(parents[-1]).count(parent) == 1 |
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126 return parent, list(parents[-1]).index(parent), parents, None |
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127 |
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128 return locals() |
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129 |
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130 |
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131 getETreeModule = moduleFactoryFactory(getETreeBuilder) |