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# ext/extract.py # Copyright 2006-2024 the Mako authors and contributors <see AUTHORS file> # # This module is part of Mako and is released under # the MIT License: http://www.opensource.org/licenses/mit-license.php from io import BytesIO from io import StringIO import re from mako import lexer from mako import parsetree class MessageExtractor: use_bytes = True def process_file(self, fileobj): template_node = lexer.Lexer( fileobj.read(), input_encoding=self.config["encoding"] ).parse() yield from self.extract_nodes(template_node.get_children()) def extract_nodes(self, nodes): translator_comments = [] in_translator_comments = False input_encoding = self.config["encoding"] or "ascii" comment_tags = list( filter(None, re.split(r"\s+", self.config["comment-tags"])) ) for node in nodes: child_nodes = None if ( in_translator_comments and isinstance(node, parsetree.Text) and not node.content.strip() ): # Ignore whitespace within translator comments continue if isinstance(node, parsetree.Comment): value = node.text.strip() if in_translator_comments: translator_comments.extend( self._split_comment(node.lineno, value) ) continue for comment_tag in comment_tags: if value.startswith(comment_tag): in_translator_comments = True translator_comments.extend( self._split_comment(node.lineno, value) ) continue if isinstance(node, parsetree.DefTag): code = node.function_decl.code child_nodes = node.nodes elif isinstance(node, parsetree.BlockTag): code = node.body_decl.code child_nodes = node.nodes elif isinstance(node, parsetree.CallTag): code = node.code.code child_nodes = node.nodes elif isinstance(node, parsetree.PageTag): code = node.body_decl.code elif isinstance(node, parsetree.CallNamespaceTag): code = node.expression child_nodes = node.nodes elif isinstance(node, parsetree.ControlLine): if node.isend: in_translator_comments = False continue code = node.text elif isinstance(node, parsetree.Code): in_translator_comments = False code = node.code.code elif isinstance(node, parsetree.Expression): code = node.code.code else: continue # Comments don't apply unless they immediately precede the message if ( translator_comments and translator_comments[-1][0] < node.lineno - 1 ): translator_comments = [] translator_strings = [ comment[1] for comment in translator_comments ] if isinstance(code, str) and self.use_bytes: code = code.encode(input_encoding, "backslashreplace") used_translator_comments = False # We add extra newline to work around a pybabel bug # (see python-babel/babel#274, parse_encoding dies if the first # input string of the input is non-ascii) # Also, because we added it, we have to subtract one from # node.lineno if self.use_bytes: code = BytesIO(b"\n" + code) else: code = StringIO("\n" + code) for message in self.process_python( code, node.lineno - 1, translator_strings ): yield message used_translator_comments = True if used_translator_comments: translator_comments = [] in_translator_comments = False if child_nodes: yield from self.extract_nodes(child_nodes) @staticmethod def _split_comment(lineno, comment): """Return the multiline comment at lineno split into a list of comment line numbers and the accompanying comment line""" return [ (lineno + index, line) for index, line in enumerate(comment.splitlines()) ]
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