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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2008 Zuza Software Foundation
#
# This file is part of translate.
#
# translate is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# translate is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with translate; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
__all__ = ['only_strings', 'map_rich']
from translate.storage.placeables import Placeable
def map_content(f, chunk):
"""If chunk is a Placeable and it has content, we need
to modify the content as well.
Note that this is NOT a pure function. For that, we would
need to copy the placeables themselves."""
if isinstance(chunk, Placeable):
if chunk.content is not None:
chunk.content = map_entry(f, chunk.content)
return chunk
def map_entry(f, chunk_seq):
"""Transform every chunk in chunk_seq with the function f,
including the inner content of any placeables."""
return [f(map_content(f, chunk)) for chunk in chunk_seq]
def only_strings(f):
"""A decorator to ensure that f is only applied to strings
and not Placeables. It's used to decorate the function
passed to map_rich."""
def decorated_f(arg):
if not isinstance(arg, Placeable):
return f(arg)
else:
return arg
return decorated_f
def map_rich(f, rich_string):
"""Return a new list of chunk sequences, where each chunk
sequence has f applied to it."""
return [map_entry(f, entry) for entry in rich_string]
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