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+# Author: David Goodger
+# Contact: goodger@users.sourceforge.net
+# Revision: $Revision$
+# Date: $Date$
+# Copyright: This module has been placed in the public domain.
+
+"""
+This package contains the Python Source Reader modules.
+
+It requires Python 2.2 or higher (`moduleparser` depends on the
+`compiler` and `tokenize` modules).
+"""
+
+__docformat__ = 'reStructuredText'
+
+
+import sys
+import docutils.readers
+from docutils.readers.python import moduleparser
+from docutils import parsers
+from docutils import nodes
+from docutils.readers.python import pynodes
+from docutils import readers
+
+class Reader(docutils.readers.Reader):
+
+ config_section = 'python reader'
+ config_section_dependencies = ('readers',)
+
+ default_parser = 'restructuredtext'
+
+ def parse(self):
+ """Parse `self.input` into a document tree."""
+ self.document = document = self.new_document()
+ module_section = moduleparser.parse_module(self.input,
+ self.source.source_path)
+ module_section.walk(DocformatVisitor(self.document))
+ visitor = DocstringFormattingVisitor(
+ document=document,
+ default_parser=self.default_parser)
+ module_section.walk(visitor)
+ self.document.append(module_section)
+
+
+class DocformatVisitor(nodes.SparseNodeVisitor):
+
+ """
+ This sets docformat attributes in a module. Wherever an assignment
+ to __docformat__ is found, we look for the enclosing scope -- a class,
+ a module, or a function -- and set the docformat attribute there.
+
+ We can't do this during the DocstringFormattingVisitor walking,
+ because __docformat__ may appear below a docstring in that format
+ (typically below the module docstring).
+ """
+
+ def visit_attribute(self, node):
+ assert isinstance(node[0], pynodes.object_name)
+ name = node[0][0].data
+ if name != '__docformat__':
+ return
+ value = None
+ for child in children:
+ if isinstance(child, pynodes.expression_value):
+ value = child[0].data
+ break
+ assert value.startswith("'") or value.startswith('"'), "__docformat__ must be assigned a string literal (not %s); line: %s" % (value, node['lineno'])
+ name = name[1:-1]
+ looking_in = node.parent
+ while not isinstance(looking_in, (pynodes.module_section,
+ pynodes.function_section,
+ pynodes.class_section)):
+ looking_in = looking_in.parent
+ looking_in['docformat'] = name
+
+
+class DocstringFormattingVisitor(nodes.SparseNodeVisitor):
+
+ def __init__(self, document, default_parser):
+ self.document = document
+ self.default_parser = default_parser
+ self.parsers = {}
+
+ def visit_docstring(self, node):
+ text = node[0].data
+ docformat = self.find_docformat(node)
+ del node[0]
+ node['docformat'] = docformat
+ parser = self.get_parser(docformat)
+ parser.parse(text, self.document)
+ for child in self.document.children:
+ node.append(child)
+ self.document.current_source = self.document.current_line = None
+ del self.document[:]
+
+ def get_parser(self, parser_name):
+ """
+ Get a parser based on its name. We reuse parsers during this
+ visitation, so parser instances are cached.
+ """
+ parser_name = parsers._parser_aliases.get(parser_name, parser_name)
+ if not self.parsers.has_key(parser_name):
+ cls = parsers.get_parser_class(parser_name)
+ self.parsers[parser_name] = cls()
+ return self.parsers[parser_name]
+
+ def find_docformat(self, node):
+ """
+ Find the __docformat__ closest to this node (i.e., look in the
+ class or module)
+ """
+ while node:
+ if node.get('docformat'):
+ return node['docformat']
+ node = node.parent
+ return self.default_parser
+
+
+if __name__ == '__main__':
+ try:
+ import locale
+ locale.setlocale(locale.LC_ALL, '')
+ except:
+ pass
+
+ from docutils.core import publish_cmdline, default_description
+
+ description = ('Generates pseudo-XML from Python modules '
+ '(for testing purposes). ' + default_description)
+
+ publish_cmdline(description=description,
+ reader=Reader())