Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/gumbo-parser/python/gumbo/soup_adapter.py @ 46:7ee69f120f19 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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1 # Copyright 2012 Google Inc. All Rights Reserved.
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2 #
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3 # Licensed under the Apache License, Version 2.0 (the "License");
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4 # you may not use this file except in compliance with the License.
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5 # You may obtain a copy of the License at
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6 #
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7 # http://www.apache.org/licenses/LICENSE-2.0
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8 #
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9 # Unless required by applicable law or agreed to in writing, software
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10 # distributed under the License is distributed on an "AS IS" BASIS,
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11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 # See the License for the specific language governing permissions and
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13 # limitations under the License.
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14 #
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16 """Adapter between Gumbo and BeautifulSoup.
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18 This parses an HTML document and gives back a BeautifulSoup object, which you
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19 can then manipulate like a normal BeautifulSoup parse tree.
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20 """
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22 __author__ = 'jdtang@google.com (Jonathan Tang)'
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24 import BeautifulSoup
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26 import gumboc
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29 def _utf8(text):
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30 return text.decode('utf-8', 'replace')
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33 def _add_source_info(obj, original_text, start_pos, end_pos):
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34 obj.original = str(original_text)
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35 obj.line = start_pos.line
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36 obj.col = start_pos.column
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37 obj.offset = start_pos.offset
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38 if end_pos:
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39 obj.end_line = end_pos.line
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40 obj.end_col = end_pos.column
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41 obj.end_offset = end_pos.offset
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44 def _convert_attrs(attrs):
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45 # TODO(jdtang): Ideally attributes would pass along their positions as well,
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46 # but I can't extend the built in str objects with new attributes. Maybe work
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47 # around this with a subclass in some way...
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48 return [(_utf8(attr.name), _utf8(attr.value)) for attr in attrs]
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51 def _add_document(soup, element):
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52 # Currently ignored, since there's no real place for this in the BeautifulSoup
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53 # API.
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54 pass
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57 def _add_element(soup, element):
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58 # TODO(jdtang): Expose next/previous in gumbo so they can be passed along to
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59 # BeautifulSoup.
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60 tag = BeautifulSoup.Tag(
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61 soup, _utf8(element.tag_name), _convert_attrs(element.attributes))
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62 for child in element.children:
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63 tag.append(_add_node(soup, child))
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64 _add_source_info(
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65 tag, element.original_tag, element.start_pos, element.end_pos)
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66 tag.original_end_tag = str(element.original_end_tag)
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67 return tag
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70 def _add_text(cls):
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71 def add_text_internal(soup, element):
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72 text = cls(_utf8(element.text))
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73 _add_source_info(text, element.original_text, element.start_pos, None)
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74 return text
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75 return add_text_internal
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78 _HANDLERS = [
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79 _add_document,
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80 _add_element,
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81 _add_text(BeautifulSoup.NavigableString),
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82 _add_text(BeautifulSoup.CData),
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83 _add_text(BeautifulSoup.Comment),
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84 _add_text(BeautifulSoup.NavigableString),
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85 _add_element,
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86 ]
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87
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88
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89 def _add_node(soup, node):
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90 return _HANDLERS[node.type.value](soup, node.contents)
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92
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93 def _add_next_prev_pointers(soup):
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94 def _traverse(node):
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95 # .findAll requires the .next pointer, which is what we're trying to add
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96 # when we call this, and so we manually supply a generator to yield the
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97 # nodes in DOM order.
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98 yield node
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99 try:
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100 for child in node.contents:
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101 for descendant in _traverse(child):
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102 yield descendant
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103 except AttributeError:
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104 # Not an element.
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105 return
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106
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107 nodes = sorted(_traverse(soup), key=lambda node: node.offset)
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108 if nodes:
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109 nodes[0].previous = None
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110 nodes[-1].next = None
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111 for i, node in enumerate(nodes[1:-1], 1):
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112 nodes[i-1].next = node
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113 node.previous = nodes[i-1]
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114
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115
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116 def parse(text, **kwargs):
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117 with gumboc.parse(text, **kwargs) as output:
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118 soup = BeautifulSoup.BeautifulSoup()
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119 soup.append(_add_node(soup, output.contents.root.contents))
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120 _add_next_prev_pointers(soup)
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121 return soup