Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/docutils/parsers/rst/directives/__init__.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: __init__.py 8367 2019-08-27 12:09:56Z 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 This package contains directive implementation modules. |
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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 import re |
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12 import codecs |
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13 import sys |
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14 |
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15 from docutils import nodes |
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16 from docutils.utils import split_escaped_whitespace, escape2null, unescape |
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17 from docutils.parsers.rst.languages import en as _fallback_language_module |
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18 |
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19 if sys.version_info >= (3, 0): |
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20 unichr = chr # noqa |
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21 |
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22 |
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23 _directive_registry = { |
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24 'attention': ('admonitions', 'Attention'), |
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25 'caution': ('admonitions', 'Caution'), |
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26 'code': ('body', 'CodeBlock'), |
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27 'danger': ('admonitions', 'Danger'), |
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28 'error': ('admonitions', 'Error'), |
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29 'important': ('admonitions', 'Important'), |
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30 'note': ('admonitions', 'Note'), |
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31 'tip': ('admonitions', 'Tip'), |
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32 'hint': ('admonitions', 'Hint'), |
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33 'warning': ('admonitions', 'Warning'), |
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34 'admonition': ('admonitions', 'Admonition'), |
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35 'sidebar': ('body', 'Sidebar'), |
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36 'topic': ('body', 'Topic'), |
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37 'line-block': ('body', 'LineBlock'), |
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38 'parsed-literal': ('body', 'ParsedLiteral'), |
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39 'math': ('body', 'MathBlock'), |
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40 'rubric': ('body', 'Rubric'), |
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41 'epigraph': ('body', 'Epigraph'), |
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42 'highlights': ('body', 'Highlights'), |
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43 'pull-quote': ('body', 'PullQuote'), |
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44 'compound': ('body', 'Compound'), |
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45 'container': ('body', 'Container'), |
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46 #'questions': ('body', 'question_list'), |
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47 'table': ('tables', 'RSTTable'), |
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48 'csv-table': ('tables', 'CSVTable'), |
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49 'list-table': ('tables', 'ListTable'), |
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50 'image': ('images', 'Image'), |
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51 'figure': ('images', 'Figure'), |
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52 'contents': ('parts', 'Contents'), |
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53 'sectnum': ('parts', 'Sectnum'), |
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54 'header': ('parts', 'Header'), |
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55 'footer': ('parts', 'Footer'), |
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56 #'footnotes': ('parts', 'footnotes'), |
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57 #'citations': ('parts', 'citations'), |
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58 'target-notes': ('references', 'TargetNotes'), |
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59 'meta': ('html', 'Meta'), |
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60 #'imagemap': ('html', 'imagemap'), |
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61 'raw': ('misc', 'Raw'), |
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62 'include': ('misc', 'Include'), |
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63 'replace': ('misc', 'Replace'), |
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64 'unicode': ('misc', 'Unicode'), |
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65 'class': ('misc', 'Class'), |
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66 'role': ('misc', 'Role'), |
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67 'default-role': ('misc', 'DefaultRole'), |
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68 'title': ('misc', 'Title'), |
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69 'date': ('misc', 'Date'), |
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70 'restructuredtext-test-directive': ('misc', 'TestDirective'),} |
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71 """Mapping of directive name to (module name, class name). The |
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72 directive name is canonical & must be lowercase. Language-dependent |
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73 names are defined in the ``language`` subpackage.""" |
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74 |
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75 _directives = {} |
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76 """Cache of imported directives.""" |
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77 |
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78 def directive(directive_name, language_module, document): |
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79 """ |
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80 Locate and return a directive function from its language-dependent name. |
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81 If not found in the current language, check English. Return None if the |
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82 named directive cannot be found. |
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83 """ |
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84 normname = directive_name.lower() |
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85 messages = [] |
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86 msg_text = [] |
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87 if normname in _directives: |
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88 return _directives[normname], messages |
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89 canonicalname = None |
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90 try: |
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91 canonicalname = language_module.directives[normname] |
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92 except AttributeError as error: |
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93 msg_text.append('Problem retrieving directive entry from language ' |
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94 'module %r: %s.' % (language_module, error)) |
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95 except KeyError: |
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96 msg_text.append('No directive entry for "%s" in module "%s".' |
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97 % (directive_name, language_module.__name__)) |
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98 if not canonicalname: |
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99 try: |
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100 canonicalname = _fallback_language_module.directives[normname] |
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101 msg_text.append('Using English fallback for directive "%s".' |
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102 % directive_name) |
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103 except KeyError: |
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104 msg_text.append('Trying "%s" as canonical directive name.' |
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105 % directive_name) |
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106 # The canonical name should be an English name, but just in case: |
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107 canonicalname = normname |
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108 if msg_text: |
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109 message = document.reporter.info( |
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110 '\n'.join(msg_text), line=document.current_line) |
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111 messages.append(message) |
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112 try: |
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113 modulename, classname = _directive_registry[canonicalname] |
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114 except KeyError: |
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115 # Error handling done by caller. |
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116 return None, messages |
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117 try: |
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118 module = __import__(modulename, globals(), locals(), level=1) |
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119 except ImportError as detail: |
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120 messages.append(document.reporter.error( |
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121 'Error importing directive module "%s" (directive "%s"):\n%s' |
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122 % (modulename, directive_name, detail), |
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123 line=document.current_line)) |
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124 return None, messages |
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125 try: |
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126 directive = getattr(module, classname) |
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127 _directives[normname] = directive |
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128 except AttributeError: |
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129 messages.append(document.reporter.error( |
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130 'No directive class "%s" in module "%s" (directive "%s").' |
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131 % (classname, modulename, directive_name), |
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132 line=document.current_line)) |
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133 return None, messages |
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134 return directive, messages |
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135 |
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136 def register_directive(name, directive): |
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137 """ |
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138 Register a nonstandard application-defined directive function. |
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139 Language lookups are not needed for such functions. |
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140 """ |
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141 _directives[name] = directive |
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142 |
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143 def flag(argument): |
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144 """ |
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145 Check for a valid flag option (no argument) and return ``None``. |
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146 (Directive option conversion function.) |
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147 |
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148 Raise ``ValueError`` if an argument is found. |
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149 """ |
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150 if argument and argument.strip(): |
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151 raise ValueError('no argument is allowed; "%s" supplied' % argument) |
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152 else: |
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153 return None |
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154 |
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155 def unchanged_required(argument): |
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156 """ |
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157 Return the argument text, unchanged. |
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158 (Directive option conversion function.) |
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159 |
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160 Raise ``ValueError`` if no argument is found. |
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161 """ |
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162 if argument is None: |
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163 raise ValueError('argument required but none supplied') |
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164 else: |
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165 return argument # unchanged! |
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166 |
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167 def unchanged(argument): |
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168 """ |
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169 Return the argument text, unchanged. |
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170 (Directive option conversion function.) |
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171 |
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172 No argument implies empty string (""). |
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173 """ |
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174 if argument is None: |
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175 return u'' |
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176 else: |
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177 return argument # unchanged! |
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178 |
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179 def path(argument): |
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180 """ |
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181 Return the path argument unwrapped (with newlines removed). |
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182 (Directive option conversion function.) |
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183 |
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184 Raise ``ValueError`` if no argument is found. |
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185 """ |
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186 if argument is None: |
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187 raise ValueError('argument required but none supplied') |
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188 else: |
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189 path = ''.join([s.strip() for s in argument.splitlines()]) |
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190 return path |
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191 |
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192 def uri(argument): |
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193 """ |
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194 Return the URI argument with unescaped whitespace removed. |
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195 (Directive option conversion function.) |
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196 |
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197 Raise ``ValueError`` if no argument is found. |
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198 """ |
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199 if argument is None: |
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200 raise ValueError('argument required but none supplied') |
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201 else: |
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202 parts = split_escaped_whitespace(escape2null(argument)) |
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203 uri = ' '.join(''.join(unescape(part).split()) for part in parts) |
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204 return uri |
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205 |
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206 def nonnegative_int(argument): |
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207 """ |
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208 Check for a nonnegative integer argument; raise ``ValueError`` if not. |
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209 (Directive option conversion function.) |
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210 """ |
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211 value = int(argument) |
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212 if value < 0: |
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213 raise ValueError('negative value; must be positive or zero') |
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214 return value |
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215 |
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216 def percentage(argument): |
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217 """ |
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218 Check for an integer percentage value with optional percent sign. |
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219 """ |
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220 try: |
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221 argument = argument.rstrip(' %') |
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222 except AttributeError: |
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223 pass |
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224 return nonnegative_int(argument) |
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225 |
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226 length_units = ['em', 'ex', 'px', 'in', 'cm', 'mm', 'pt', 'pc'] |
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227 |
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228 def get_measure(argument, units): |
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229 """ |
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230 Check for a positive argument of one of the units and return a |
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231 normalized string of the form "<value><unit>" (without space in |
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232 between). |
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233 |
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234 To be called from directive option conversion functions. |
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235 """ |
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236 match = re.match(r'^([0-9.]+) *(%s)$' % '|'.join(units), argument) |
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237 try: |
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238 float(match.group(1)) |
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239 except (AttributeError, ValueError): |
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240 raise ValueError( |
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241 'not a positive measure of one of the following units:\n%s' |
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242 % ' '.join(['"%s"' % i for i in units])) |
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243 return match.group(1) + match.group(2) |
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244 |
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245 def length_or_unitless(argument): |
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246 return get_measure(argument, length_units + ['']) |
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247 |
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248 def length_or_percentage_or_unitless(argument, default=''): |
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249 """ |
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250 Return normalized string of a length or percentage unit. |
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251 |
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252 Add <default> if there is no unit. Raise ValueError if the argument is not |
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253 a positive measure of one of the valid CSS units (or without unit). |
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254 |
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255 >>> length_or_percentage_or_unitless('3 pt') |
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256 '3pt' |
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257 >>> length_or_percentage_or_unitless('3%', 'em') |
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258 '3%' |
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259 >>> length_or_percentage_or_unitless('3') |
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260 '3' |
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261 >>> length_or_percentage_or_unitless('3', 'px') |
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262 '3px' |
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263 """ |
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264 try: |
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265 return get_measure(argument, length_units + ['%']) |
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266 except ValueError: |
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267 try: |
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268 return get_measure(argument, ['']) + default |
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269 except ValueError: |
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270 # raise ValueError with list of valid units: |
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271 return get_measure(argument, length_units + ['%']) |
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272 |
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273 def class_option(argument): |
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274 """ |
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275 Convert the argument into a list of ID-compatible strings and return it. |
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276 (Directive option conversion function.) |
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277 |
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278 Raise ``ValueError`` if no argument is found. |
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279 """ |
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280 if argument is None: |
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281 raise ValueError('argument required but none supplied') |
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282 names = argument.split() |
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283 class_names = [] |
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284 for name in names: |
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285 class_name = nodes.make_id(name) |
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286 if not class_name: |
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287 raise ValueError('cannot make "%s" into a class name' % name) |
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288 class_names.append(class_name) |
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289 return class_names |
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290 |
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291 unicode_pattern = re.compile( |
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292 r'(?:0x|x|\\x|U\+?|\\u)([0-9a-f]+)$|&#x([0-9a-f]+);$', re.IGNORECASE) |
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293 |
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294 def unicode_code(code): |
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295 r""" |
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296 Convert a Unicode character code to a Unicode character. |
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297 (Directive option conversion function.) |
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298 |
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299 Codes may be decimal numbers, hexadecimal numbers (prefixed by ``0x``, |
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300 ``x``, ``\x``, ``U+``, ``u``, or ``\u``; e.g. ``U+262E``), or XML-style |
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301 numeric character entities (e.g. ``☮``). Other text remains as-is. |
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302 |
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303 Raise ValueError for illegal Unicode code values. |
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304 """ |
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305 try: |
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306 if code.isdigit(): # decimal number |
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307 return unichr(int(code)) |
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308 else: |
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309 match = unicode_pattern.match(code) |
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310 if match: # hex number |
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311 value = match.group(1) or match.group(2) |
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312 return unichr(int(value, 16)) |
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313 else: # other text |
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314 return code |
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315 except OverflowError as detail: |
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316 raise ValueError('code too large (%s)' % detail) |
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317 |
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318 def single_char_or_unicode(argument): |
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319 """ |
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320 A single character is returned as-is. Unicode characters codes are |
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321 converted as in `unicode_code`. (Directive option conversion function.) |
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322 """ |
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323 char = unicode_code(argument) |
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324 if len(char) > 1: |
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325 raise ValueError('%r invalid; must be a single character or ' |
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326 'a Unicode code' % char) |
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327 return char |
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328 |
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329 def single_char_or_whitespace_or_unicode(argument): |
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330 """ |
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331 As with `single_char_or_unicode`, but "tab" and "space" are also supported. |
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332 (Directive option conversion function.) |
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333 """ |
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334 if argument == 'tab': |
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335 char = '\t' |
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336 elif argument == 'space': |
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337 char = ' ' |
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338 else: |
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339 char = single_char_or_unicode(argument) |
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340 return char |
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341 |
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342 def positive_int(argument): |
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343 """ |
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344 Converts the argument into an integer. Raises ValueError for negative, |
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345 zero, or non-integer values. (Directive option conversion function.) |
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346 """ |
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347 value = int(argument) |
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348 if value < 1: |
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349 raise ValueError('negative or zero value; must be positive') |
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350 return value |
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351 |
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352 def positive_int_list(argument): |
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353 """ |
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354 Converts a space- or comma-separated list of values into a Python list |
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355 of integers. |
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356 (Directive option conversion function.) |
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357 |
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358 Raises ValueError for non-positive-integer values. |
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359 """ |
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360 if ',' in argument: |
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361 entries = argument.split(',') |
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362 else: |
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363 entries = argument.split() |
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364 return [positive_int(entry) for entry in entries] |
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365 |
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366 def encoding(argument): |
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367 """ |
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368 Verfies the encoding argument by lookup. |
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369 (Directive option conversion function.) |
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370 |
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371 Raises ValueError for unknown encodings. |
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372 """ |
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373 try: |
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374 codecs.lookup(argument) |
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375 except LookupError: |
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376 raise ValueError('unknown encoding: "%s"' % argument) |
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377 return argument |
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378 |
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379 def choice(argument, values): |
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380 """ |
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381 Directive option utility function, supplied to enable options whose |
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382 argument must be a member of a finite set of possible values (must be |
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383 lower case). A custom conversion function must be written to use it. For |
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384 example:: |
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385 |
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386 from docutils.parsers.rst import directives |
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387 |
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388 def yesno(argument): |
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389 return directives.choice(argument, ('yes', 'no')) |
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390 |
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391 Raise ``ValueError`` if no argument is found or if the argument's value is |
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392 not valid (not an entry in the supplied list). |
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393 """ |
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394 try: |
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395 value = argument.lower().strip() |
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396 except AttributeError: |
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397 raise ValueError('must supply an argument; choose from %s' |
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398 % format_values(values)) |
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399 if value in values: |
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400 return value |
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401 else: |
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402 raise ValueError('"%s" unknown; choose from %s' |
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403 % (argument, format_values(values))) |
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404 |
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405 def format_values(values): |
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406 return '%s, or "%s"' % (', '.join(['"%s"' % s for s in values[:-1]]), |
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407 values[-1]) |
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408 |
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409 def value_or(values, other): |
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410 """ |
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411 The argument can be any of `values` or `argument_type`. |
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412 """ |
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413 def auto_or_other(argument): |
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414 if argument in values: |
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415 return argument |
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416 else: |
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417 return other(argument) |
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418 return auto_or_other |
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419 |