annotate MoinMoin/parser/rst.py @ 0:77665d8e2254

tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0 (automatically generated log message) imported from: moin--main--1.5--base-0
author Thomas Waldmann <tw-public@gmx.de>
date Thu, 22 Sep 2005 15:09:50 +0000
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1 # -*- coding: iso-8859-1 -*-
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2 """
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3 MoinMoin - ReStructured Text Parser
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4
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5 @copyright: 2004 by Matthew Gilbert <gilbert AT voxmea DOT net>
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6 and by Alexander Schremmer <alex AT alexanderweb DOT de>
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7 @license: GNU GPL, see COPYING for details.
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8
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9 REQUIRES docutils 0.3.3 or later
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10 """
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11
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12 import re
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13 import new
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14 import StringIO
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15 import __builtin__
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16 import sys
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17 import copy
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18
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19 # docutils imports are below
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20 import MoinMoin.parser.wiki
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21 from MoinMoin.Page import Page
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22
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23 Dependencies = [] # this parser just depends on the raw text
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24
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25 # --- make docutils safe by overriding all module-scoped names related to IO ---
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26
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27 # TODO: Add an error message to dummyOpen so that the user knows what they did
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28 # requested an unsupported feature of docutils in MoinMoin.
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29 def dummyOpen(x, y=None, z=None): return
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30
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31 class dummyIO(StringIO.StringIO):
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32 def __init__(self, destination=None, destination_path=None,
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33 encoding=None, error_handler='', autoclose=1,
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34 handle_io_errors=1, source_path=None):
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35 StringIO.StringIO.__init__(self)
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36
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37 class dummyUrllib2:
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38 def urlopen(a):
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39 return StringIO.StringIO()
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40 urlopen = staticmethod(urlopen)
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41
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42 # # # All docutils imports must be contained below here
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43 import docutils
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44 from docutils.core import publish_parts
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45 from docutils.writers import html4css1
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46 from docutils.nodes import fully_normalize_name, reference
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47 from docutils.parsers import rst
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48 from docutils.parsers.rst import directives, roles
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49 # # # All docutils imports must be contained above here
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50
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51 def safe_import(name, globals = None, locals = None, fromlist = None):
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52 mod = __builtin__.__import__(name, globals, locals, fromlist)
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53 if mod:
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54 mod.open = dummyOpen
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55 mod.urllib2 = dummyUrllib2
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56 return mod
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57
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58 # Go through and change all docutils modules to use a dummyOpen and dummyUrllib2
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59 # module. Also make sure that any docutils imported modules also get the dummy
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60 # implementations.
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61 for i in sys.modules.keys():
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62 if i.startswith('docutils') and sys.modules[i]:
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63 sys.modules[i].open = dummyOpen
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64 sys.modules[i].urllib2 = dummyUrllib2
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65 sys.modules[i].__import__ = safe_import
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66
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67 docutils.io.FileOutput = docutils.io.FileInput = dummyIO
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68
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69 # --- End of dummy-code --------------------------------------------------------
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70
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71 def html_escape_unicode(node):
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72 # Find Python function that does this for me. string.encode('ascii',
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73 # 'xmlcharrefreplace') only 2.3 and above.
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74 for i in node:
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75 if ord(i) > 127:
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76 node = node.replace(i, '&#%d;' % (ord(i)))
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77 return node
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78
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79 class MoinWriter(html4css1.Writer):
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80
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81 config_section = 'MoinMoin writer'
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82 config_section_dependencies = ('writers',)
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83
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84 #"""Final translated form of `document`."""
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85 output = None
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86
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87 def wiki_resolver(self, node):
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88 """
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89 Normally an unknown reference would be an error in an reST document.
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90 However, this is how new documents are created in the wiki. This
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91 passes on unknown references to eventually be handled by the
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92 MoinMoin formatter.
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93 """
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94 # TODO: Need to better document the attributes here.
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95 if getattr(node, 'indirect_reference_name', None):
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96 node['refuri'] = node.indirect_reference_name
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97 return 1
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98 elif 'id' in node.attributes:
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99 # I'm pretty sure the first test should catch any targets or
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100 # references with the "id" attribute. Therefore, if we get to here
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101 # its probably an internal link that didn't work so we let it go
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102 # through as an error.
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103 return 0
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104 node['refuri'] = node['refname']
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105 del node['refname']
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106 self.nodes.append(node)
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107 return 1
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108
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109 wiki_resolver.priority = 001
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110
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111 def __init__(self, formatter, request):
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112 html4css1.Writer.__init__(self)
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113 self.formatter = formatter
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114 self.request = request
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115 # Add our wiki unknown_reference_resolver to our list of functions to
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116 # run when a target isn't found
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117 self.unknown_reference_resolvers = [self.wiki_resolver]
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118 # We create a new parser to process MoinMoin wiki style links in the
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119 # reST.
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120 self.wikiparser = MoinMoin.parser.wiki.Parser('', self.request)
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121 self.wikiparser.formatter = self.formatter
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122 self.wikiparser.hilite_re = None
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123 self.nodes = []
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124
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125
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126 def translate(self):
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127 visitor = MoinTranslator(self.document,
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128 self.formatter,
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129 self.request,
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130 self.wikiparser,
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131 self)
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132 self.document.walkabout(visitor)
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133 self.visitor = visitor
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134 self.output = html_escape_unicode(visitor.astext())
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135
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136
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137 class Parser:
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138 caching = 1
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139 Dependencies = Dependencies # copy dependencies from module-scope
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140
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141 def __init__(self, raw, request, **kw):
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142 self.raw = raw
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143 self.request = request
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144 self.form = request.form
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145
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146 def format(self, formatter):
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147 # Create our simple parser
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148 parser = MoinDirectives(self.request)
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149
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150 parts = publish_parts(source = self.raw,
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151 writer = MoinWriter(formatter, self.request),
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152 settings_overrides = {'halt_level': 5,
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153 'traceback': True,
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154 'file_insertion_enabled': 0,
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155 'raw_enabled': 0,
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156 }
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157 )
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158
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159 text = ''
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160 if parts['title']:
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161 text += '<h2>' + parts['title'] + '</h2>'
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162 # If there is only one subtitle then it is held in parts['subtitle'].
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163 # However, if there is more than one subtitle then this is empty and
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164 # fragment contains all of the subtitles.
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165 if parts['subtitle']:
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166 text += '<h3>' + parts['subtitle'] + '</h3>'
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167 if parts['docinfo']:
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168 text += parts['docinfo']
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169 text += parts['fragment']
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170 self.request.write(html_escape_unicode(text))
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171
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172
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173 class MoinTranslator(html4css1.HTMLTranslator):
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174
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175 def __init__(self, document, formatter, request, parser, writer):
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176 html4css1.HTMLTranslator.__init__(self, document)
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177 self.formatter = formatter
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178 self.request = request
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179 # MMG: Using our own writer when needed. Save the old one to restore
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180 # after the page has been processed by the html4css1 parser.
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181 self.original_write, self.request.write = self.request.write, self.capture_wiki_formatting
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182 self.wikiparser = parser
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183 self.wikiparser.request = request
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184 # MoinMoin likes to start the initial headers at level 3 and the title
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185 # gets level 2, so to comply with their styles, we do here also.
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186 # TODO: Could this be fixed by passing this value in settings_overrides?
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187 self.initial_header_level = 3
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188 # Temporary place for wiki returned markup. This will be filled when
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189 # replacing the default writer with the capture_wiki_formatting
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190 # function (see visit_image for an example).
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191 self.wiki_text = ''
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192 self.setup_wiki_handlers()
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193
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194 def capture_wiki_formatting(self, text):
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195 """
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196 Captures MoinMoin generated markup to the instance variable
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197 wiki_text.
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198 """
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199 # For some reason getting empty strings here which of course overwrites
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200 # what we really want (this is called multiple times per MoinMoin
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201 # format call, which I don't understand).
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202 self.wiki_text += text
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203
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204 def process_wiki_text(self, text):
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205 """
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206 This sequence is repeated numerous times, so its captured as a
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207 single call here. Its important that wiki_text is blanked before we
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208 make the format call. format will call request.write which we've
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209 hooked to capture_wiki_formatting. If wiki_text is not blanked
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210 before a call to request.write we will get the old markup as well as
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211 the newly generated markup.
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212
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213 TODO: Could implement this as a list so that it acts as a stack. I
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214 don't like having to remember to blank wiki_text.
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215 """
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216 self.wiki_text = ''
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217 self.wikiparser.raw = text
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218 self.wikiparser.format(self.formatter)
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219
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220 def add_wiki_markup(self):
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221 """
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222 Place holder in case this becomes more elaborate someday. For now it
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223 only appends the MoinMoin generated markup to the html body and
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224 raises SkipNode.
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225 """
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226 self.body.append(self.wiki_text)
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227 self.wiki_text = ''
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228 raise docutils.nodes.SkipNode
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229
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230 def astext(self):
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231 self.request.write = self.original_write
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232 return html4css1.HTMLTranslator.astext(self)
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233
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234 def process_inline(self, node, uri_string):
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235 """
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236 Process the "inline:" link scheme. This can either ome from
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237 visit_reference or from visit_image. The uri_string changes
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238 depending on the caller. The uri is passed to MoinMoin to handle the
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239 inline link. If it is an image, the src line is extracted and passed
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240 to the html4css1 writer to allow the reST image attributes.
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241 Otherwise, the html from MoinMoin is inserted into the reST document
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242 and SkipNode is raised.
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243 """
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244 self.process_wiki_text(node[uri_string])
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245 # Only pass the src and alt parts to the writer. The reST writer
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246 # inserts its own tags so we don't need the MoinMoin html markup.
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247 src = re.search('src="([^"]+)"', self.wiki_text)
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248 if src:
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249 node['uri'] = src.groups()[0]
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250 if not 'alt' in node.attributes:
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251 alt = re.search('alt="([^"]*)"', self.wiki_text)
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252 if alt:
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253 node['alt'] = alt.groups()[0]
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254 else:
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255 # Image doesn't exist yet for the page so just use what's
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256 # returned from MoinMoin verbatim
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257 self.add_wiki_markup()
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258
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259 def process_wiki_target(self, target):
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260 self.process_wiki_text(target)
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261 # MMG: May need a call to fixup_wiki_formatting here but I
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262 # don't think so.
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263 self.add_wiki_markup()
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264
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265 def fixup_wiki_formatting(self, text):
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266 replacement = {'<p>': '', '</p>': '', '\n': '', '> ': '>'}
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267 for src, dst in replacement.items():
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268 text = text.replace(src, dst)
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269 # Everything seems to have a space ending the text block. We want to
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270 # get rid of this
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271 if text and text[-1] == ' ':
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272 text = text[:-1]
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273 return text
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274
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275 def visit_reference(self, node):
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276 """
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277 Pass links to MoinMoin to get the correct wiki space url. Extract
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278 the url and pass it on to the html4css1 writer to handle. Inline
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279 images are also handled by visit_image. Not sure what the "drawing:"
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280 link scheme is used for, so for now it is handled here.
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281
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282 Also included here is a hack to allow MoinMoin macros. This routine
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283 checks for a link which starts with "[[". This link is passed to the
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284 MoinMoin formatter and the resulting markup is inserted into the
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285 document in the place of the original link reference.
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286 """
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287 moin_link_schemes = ('wiki:', 'attachment:', 'drawing:', '[[',
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288 'inline:')
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289
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290 if 'refuri' in node.attributes:
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291 target = None
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292 refuri = node['refuri']
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293
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294 # MMG: Fix this line
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295 if [scheme for scheme in moin_link_schemes if
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296 refuri.lstrip().startswith(scheme)]:
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297 # For a macro, We want the actuall text from the user in target,
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298 # not the fully normalized version that is contained in refuri.
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299 if refuri.startswith('[['):
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300 target = node['name']
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301 else:
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diff changeset
302 target = refuri
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303 # TODO: Figure out the following two elif's and comment
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304 # appropriately.
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305 # The node should have a whitespace normalized name if the docutlis
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306 # reStructuredText parser would normally fully normalize the name.
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307 elif ('name' in node.attributes and
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308 fully_normalize_name(node['name']) == refuri):
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309 target = ':%s:' % (node['name'])
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310 # If its not a uri containing a ':' then its probably destined for
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311 # wiki space.
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312 elif ':' not in refuri:
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313 target = ':%s:' % (refuri)
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diff changeset
314
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diff changeset
315 if target:
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316 if target.startswith('inline:'):
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317 self.process_inline(node, 'refuri')
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318 elif target.startswith('[[') and target.endswith(']]'):
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319 self.process_wiki_target(target)
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320 else:
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321 # Not a macro or inline so hopefully its a link. Put the target in
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322 # brackets so that MoinMoin knows its a link. Extract the
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323 # href, if it exists, and let docutils handle it from there.
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324 # If there is no href just add whatever MoinMoin returned.
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diff changeset
325 node_text = node.astext().replace('\n', ' ')
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diff changeset
326 self.process_wiki_text('[%s %s]' % (target, node_text))
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diff changeset
327 href = re.search('href="([^"]+)"', self.wiki_text)
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diff changeset
328 if href:
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329 # dirty hack in order to undo the HTML entity quoting
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330 node['refuri'] = href.groups()[0].replace("&amp;", "&")
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331 else:
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diff changeset
332 self.wiki_text = self.fixup_wiki_formatting(self.wiki_text)
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diff changeset
333 self.add_wiki_markup()
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diff changeset
334 html4css1.HTMLTranslator.visit_reference(self, node)
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diff changeset
335
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336 def visit_image(self, node):
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337 """
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338 Need to intervene in the case of inline images. We need MoinMoin to
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339 give us the actual src line to the image and then we can feed this
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340 to the default html4css1 writer. NOTE: Since the writer can't "open"
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341 this image the scale attribute doesn't work without directly
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342 specifying the height or width (or both).
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343
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344 TODO: Need to handle figures similarly.
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345 """
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346 uri = node['uri'].lstrip()
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347 prefix = '' # assume no prefix
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348 if ':' in uri:
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349 prefix = uri.split(':',1)[0]
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350 # if prefix isn't URL, try to display in page
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351 if not prefix.lower() in ('file', 'http', 'https', 'ftp'):
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352 # no prefix given, so fake "inline:"
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diff changeset
353 if not prefix:
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diff changeset
354 node['uri'] = 'inline:' + uri
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diff changeset
355 self.process_inline(node, 'uri')
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diff changeset
356 html4css1.HTMLTranslator.visit_image(self, node)
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diff changeset
357
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diff changeset
358 def create_wiki_functor(self, moin_func):
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diff changeset
359 moin_callable = getattr(self.formatter, moin_func)
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diff changeset
360 def visit_func(self, node):
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diff changeset
361 self.wiki_text = ''
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diff changeset
362 self.request.write(moin_callable(1))
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diff changeset
363 self.body.append(self.wiki_text)
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364 def depart_func(self, node):
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365 self.wiki_text = ''
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366 self.request.write(moin_callable(0))
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367 self.body.append(self.wiki_text)
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368 return visit_func, depart_func
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369
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370 def setup_wiki_handlers(self):
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371 """
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372 Have the MoinMoin formatter handle markup when it makes sense. These
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373 are portions of the document that do not contain reST specific
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374 markup. This allows these portions of the document to look
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375 consistent with other wiki pages.
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diff changeset
376
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377 Setup dispatch routines to handle basic document markup. The
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378 hanlders dict is the html4css1 handler name followed by the wiki
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379 handler name.
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380 """
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381 handlers = {
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382 # Text Markup
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383 'emphasis': 'emphasis',
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diff changeset
384 'strong': 'strong',
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diff changeset
385 'literal': 'code',
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386 # Blocks
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387 'literal_block': 'preformatted',
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388 # Simple Lists
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389 'bullet_list': 'bullet_list',
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390 'list_item': 'listitem',
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391 # Definition List
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392 'definition_list': 'definition_list',
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393 # Admonitions
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394 'warning': 'highlight'}
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395 for rest_func, moin_func in handlers.items():
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396 visit_func, depart_func = self.create_wiki_functor(moin_func)
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397 visit_func = new.instancemethod(visit_func, self, MoinTranslator)
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398 depart_func = new.instancemethod(depart_func, self, MoinTranslator)
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399 setattr(self, 'visit_%s' % (rest_func), visit_func)
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400 setattr(self, 'depart_%s' % (rest_func), depart_func)
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diff changeset
401
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diff changeset
402 # Enumerated list takes an extra paramter so we handle this differently
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403 def visit_enumerated_list(self, node):
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404 self.wiki_text = ''
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405 self.request.write(self.formatter.number_list(1, start=node.get('start', None)))
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diff changeset
406 self.body.append(self.wiki_text)
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diff changeset
407
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diff changeset
408 def depart_enumerated_list(self, node):
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409 self.wiki_text = ''
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diff changeset
410 self.request.write(self.formatter.number_list(0))
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diff changeset
411 self.body.append(self.wiki_text)
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diff changeset
412
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parents:
diff changeset
413
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diff changeset
414 class MoinDirectives:
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diff changeset
415 """
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416 Class to handle all custom directive handling. This code is called as
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diff changeset
417 part of the parsing stage.
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diff changeset
418 """
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diff changeset
419
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diff changeset
420 def __init__(self, request):
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diff changeset
421 self.request = request
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diff changeset
422
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diff changeset
423 # include MoinMoin pages
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424 directives.register_directive('include', self.include)
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diff changeset
425
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diff changeset
426 # used for MoinMoin macros
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diff changeset
427 directives.register_directive('macro', self.macro)
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diff changeset
428
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diff changeset
429 # disallow a few directives in order to prevent XSS
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diff changeset
430 # for directive in ('meta', 'include', 'raw'):
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diff changeset
431 for directive in ('meta', 'raw'):
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432 directives.register_directive(directive, None)
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diff changeset
433
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diff changeset
434 # disable the raw role
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diff changeset
435 roles._roles['raw'] = None
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diff changeset
436
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diff changeset
437 # As a quick fix for infinite includes we only allow a fixed number of
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
438 # includes per page
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
439 self.num_includes = 0
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diff changeset
440 self.max_includes = 10
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diff changeset
441
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parents:
diff changeset
442 # Handle the include directive rather than letting the default docutils
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diff changeset
443 # parser handle it. This allows the inclusion of MoinMoin pages instead of
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
444 # something from the filesystem.
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diff changeset
445 def include(self, name, arguments, options, content, lineno,
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diff changeset
446 content_offset, block_text, state, state_machine):
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diff changeset
447 # content contains the included file name
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diff changeset
448
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diff changeset
449 _ = self.request.getText
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diff changeset
450
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diff changeset
451 # Limit the number of documents that can be included
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diff changeset
452 if self.num_includes < self.max_includes:
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diff changeset
453 self.num_includes += 1
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diff changeset
454 else:
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diff changeset
455 lines = [_("**Maximum number of allowed includes exceeded**")]
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diff changeset
456 state_machine.insert_input(lines, 'MoinDirectives')
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parents:
diff changeset
457 return
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
458
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
459 if len(content):
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diff changeset
460 page = Page(page_name = content[0], request = self.request)
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diff changeset
461 if page.exists():
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diff changeset
462 text = page.get_raw_body()
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diff changeset
463 lines = text.split('\n')
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parents:
diff changeset
464 # Remove the "#format rst" line
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diff changeset
465 if lines[0].startswith("#format"):
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parents:
diff changeset
466 del lines[0]
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diff changeset
467 else:
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diff changeset
468 lines = [_("**Could not find the referenced page: %s**") % (content[0],)]
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diff changeset
469 # Insert the text from the included document and then continue
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parents:
diff changeset
470 # parsing
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diff changeset
471 state_machine.insert_input(lines, 'MoinDirectives')
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
472 return
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
473
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
474 include.content = True
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
475
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
476 # Add additional macro directive.
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
477 # This allows MoinMoin macros to be used either by using the directive
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parents:
diff changeset
478 # directly or by using the substitution syntax. Much cleaner than using the
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parents:
diff changeset
479 # reference hack (`[[SomeMacro]]`_). This however simply adds a node to the
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parents:
diff changeset
480 # document tree which is a reference, but through a much better user
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
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parents:
diff changeset
481 # interface.
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parents:
diff changeset
482 def macro(self, name, arguments, options, content, lineno,
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
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parents:
diff changeset
483 content_offset, block_text, state, state_machine):
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Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
484 # content contains macro to be called
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
485 if len(content):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
486 # Allow either with or without brackets
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
487 if content[0].startswith('[['):
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
488 macro = content[0]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
489 else:
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
490 macro = '[[%s]]' % content[0]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
491 ref = reference(macro, refuri = macro)
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
492 ref['name'] = macro
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
493 return [ref]
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
494 return
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
495
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
496 macro.content = True
77665d8e2254 tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0
Thomas Waldmann <tw-public@gmx.de>
parents:
diff changeset
497