Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/docutils/parsers/rst/directives/images.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # $Id: images.py 8370 2019-08-27 12:10:39Z milde $ |
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2 # Author: David Goodger <goodger@python.org> |
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3 # Copyright: This module has been placed in the public domain. |
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4 |
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5 """ |
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6 Directives for figures and simple images. |
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7 """ |
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8 |
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9 __docformat__ = 'reStructuredText' |
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10 |
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11 |
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12 import sys |
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13 |
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14 from docutils import nodes, utils |
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15 from docutils.parsers.rst import Directive |
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16 from docutils.parsers.rst import directives, states |
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17 from docutils.nodes import fully_normalize_name, whitespace_normalize_name |
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18 from docutils.parsers.rst.roles import set_classes |
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19 |
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20 try: # check for the Python Imaging Library |
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21 import PIL.Image |
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22 except ImportError: |
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23 try: # sometimes PIL modules are put in PYTHONPATH's root |
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24 import Image |
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25 class PIL(object): pass # dummy wrapper |
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26 PIL.Image = Image |
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27 except ImportError: |
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28 PIL = None |
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29 |
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30 if sys.version_info >= (3, 0): |
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31 from urllib.request import url2pathname |
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32 else: |
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33 from urllib import url2pathname |
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34 |
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35 |
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36 class Image(Directive): |
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37 |
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38 align_h_values = ('left', 'center', 'right') |
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39 align_v_values = ('top', 'middle', 'bottom') |
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40 align_values = align_v_values + align_h_values |
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41 |
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42 def align(argument): |
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43 # This is not callable as self.align. We cannot make it a |
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44 # staticmethod because we're saving an unbound method in |
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45 # option_spec below. |
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46 return directives.choice(argument, Image.align_values) |
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47 |
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48 required_arguments = 1 |
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49 optional_arguments = 0 |
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50 final_argument_whitespace = True |
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51 option_spec = {'alt': directives.unchanged, |
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52 'height': directives.length_or_unitless, |
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53 'width': directives.length_or_percentage_or_unitless, |
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54 'scale': directives.percentage, |
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55 'align': align, |
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56 'name': directives.unchanged, |
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57 'target': directives.unchanged_required, |
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58 'class': directives.class_option} |
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59 |
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60 def run(self): |
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61 if 'align' in self.options: |
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62 if isinstance(self.state, states.SubstitutionDef): |
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63 # Check for align_v_values. |
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64 if self.options['align'] not in self.align_v_values: |
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65 raise self.error( |
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66 'Error in "%s" directive: "%s" is not a valid value ' |
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67 'for the "align" option within a substitution ' |
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68 'definition. Valid values for "align" are: "%s".' |
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69 % (self.name, self.options['align'], |
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70 '", "'.join(self.align_v_values))) |
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71 elif self.options['align'] not in self.align_h_values: |
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72 raise self.error( |
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73 'Error in "%s" directive: "%s" is not a valid value for ' |
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74 'the "align" option. Valid values for "align" are: "%s".' |
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75 % (self.name, self.options['align'], |
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76 '", "'.join(self.align_h_values))) |
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77 messages = [] |
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78 reference = directives.uri(self.arguments[0]) |
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79 self.options['uri'] = reference |
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80 reference_node = None |
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81 if 'target' in self.options: |
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82 block = states.escape2null( |
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83 self.options['target']).splitlines() |
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84 block = [line for line in block] |
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85 target_type, data = self.state.parse_target( |
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86 block, self.block_text, self.lineno) |
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87 if target_type == 'refuri': |
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88 reference_node = nodes.reference(refuri=data) |
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89 elif target_type == 'refname': |
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90 reference_node = nodes.reference( |
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91 refname=fully_normalize_name(data), |
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92 name=whitespace_normalize_name(data)) |
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93 reference_node.indirect_reference_name = data |
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94 self.state.document.note_refname(reference_node) |
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95 else: # malformed target |
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96 messages.append(data) # data is a system message |
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97 del self.options['target'] |
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98 set_classes(self.options) |
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99 image_node = nodes.image(self.block_text, **self.options) |
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100 self.add_name(image_node) |
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101 if reference_node: |
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102 reference_node += image_node |
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103 return messages + [reference_node] |
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104 else: |
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105 return messages + [image_node] |
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106 |
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107 |
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108 class Figure(Image): |
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109 |
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110 def align(argument): |
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111 return directives.choice(argument, Figure.align_h_values) |
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112 |
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113 def figwidth_value(argument): |
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114 if argument.lower() == 'image': |
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115 return 'image' |
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116 else: |
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117 return directives.length_or_percentage_or_unitless(argument, 'px') |
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118 |
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119 option_spec = Image.option_spec.copy() |
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120 option_spec['figwidth'] = figwidth_value |
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121 option_spec['figclass'] = directives.class_option |
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122 option_spec['align'] = align |
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123 has_content = True |
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124 |
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125 def run(self): |
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126 figwidth = self.options.pop('figwidth', None) |
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127 figclasses = self.options.pop('figclass', None) |
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128 align = self.options.pop('align', None) |
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129 (image_node,) = Image.run(self) |
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130 if isinstance(image_node, nodes.system_message): |
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131 return [image_node] |
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132 figure_node = nodes.figure('', image_node) |
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133 if figwidth == 'image': |
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134 if PIL and self.state.document.settings.file_insertion_enabled: |
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135 imagepath = url2pathname(image_node['uri']) |
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136 try: |
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137 img = PIL.Image.open( |
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138 imagepath.encode(sys.getfilesystemencoding())) |
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139 except (IOError, UnicodeEncodeError): |
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140 pass # TODO: warn? |
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141 else: |
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142 self.state.document.settings.record_dependencies.add( |
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143 imagepath.replace('\\', '/')) |
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144 figure_node['width'] = '%dpx' % img.size[0] |
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145 del img |
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146 elif figwidth is not None: |
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147 figure_node['width'] = figwidth |
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148 if figclasses: |
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149 figure_node['classes'] += figclasses |
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150 if align: |
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151 figure_node['align'] = align |
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152 if self.content: |
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153 node = nodes.Element() # anonymous container for parsing |
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154 self.state.nested_parse(self.content, self.content_offset, node) |
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155 first_node = node[0] |
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156 if isinstance(first_node, nodes.paragraph): |
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157 caption = nodes.caption(first_node.rawsource, '', |
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158 *first_node.children) |
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159 caption.source = first_node.source |
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160 caption.line = first_node.line |
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161 figure_node += caption |
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162 elif not (isinstance(first_node, nodes.comment) |
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163 and len(first_node) == 0): |
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164 error = self.state_machine.reporter.error( |
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165 'Figure caption must be a paragraph or empty comment.', |
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166 nodes.literal_block(self.block_text, self.block_text), |
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167 line=self.lineno) |
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168 return [figure_node, error] |
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169 if len(node) > 1: |
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170 figure_node += nodes.legend('', *node[1:]) |
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171 return [figure_node] |