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# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2010 Tomeu Vizoso <tomeu.vizoso@collabora.co.uk>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
from ..importer import modules
from .._gi import variant_new_tuple, variant_type_from_string
GLib = modules['GLib'].introspection_module
__all__ = []
class _VariantCreator(object):
_LEAF_CONSTRUCTORS = {
'b': GLib.Variant.new_boolean,
'y': GLib.Variant.new_byte,
'n': GLib.Variant.new_int16,
'q': GLib.Variant.new_uint16,
'i': GLib.Variant.new_int32,
'u': GLib.Variant.new_uint32,
'x': GLib.Variant.new_int64,
't': GLib.Variant.new_uint64,
'h': GLib.Variant.new_handle,
'd': GLib.Variant.new_double,
's': GLib.Variant.new_string,
'o': GLib.Variant.new_object_path,
'g': GLib.Variant.new_signature,
'v': GLib.Variant.new_variant,
}
def __init__(self, format_string, args):
self._format_string = format_string
self._args = args
def create(self):
if self._format_string_is_leaf():
return self._new_variant_leaf()
format_char = self._pop_format_char()
arg = self._pop_arg()
if format_char == 'm':
raise NotImplementedError()
else:
builder = GLib.VariantBuilder()
if format_char == '(':
builder.init(variant_type_from_string('r'))
elif format_char == '{':
builder.init(variant_type_from_string('{?*}'))
else:
raise NotImplementedError()
format_char = self._pop_format_char()
while format_char not in [')', '}']:
builder.add_value(Variant(format_char, arg))
format_char = self._pop_format_char()
if self._args:
arg = self._pop_arg()
return builder.end()
def _format_string_is_leaf(self):
format_char = self._format_string[0]
return not format_char in ['m', '(', '{']
def _format_string_is_nnp(self):
format_char = self._format_string[0]
return format_char in ['a', 's', 'o', 'g', '^', '@', '*', '?', 'r',
'v', '&']
def _new_variant_leaf(self):
if self._format_string_is_nnp():
return self._new_variant_nnp()
format_char = self._pop_format_char()
arg = self._pop_arg()
return _VariantCreator._LEAF_CONSTRUCTORS[format_char](arg)
def _new_variant_nnp(self):
format_char = self._pop_format_char()
arg = self._pop_arg()
if format_char == '&':
format_char = self._pop_format_char()
if format_char == 'a':
builder = GLib.VariantBuilder()
builder.init(variant_type_from_string('a*'))
element_format_string = self._pop_leaf_format_string()
if isinstance(arg, dict):
for element in arg.items():
value = Variant(element_format_string, *element)
builder.add_value(value)
else:
for element in arg:
value = Variant(element_format_string, element)
builder.add_value(value)
return builder.end()
elif format_char == '^':
raise NotImplementedError()
elif format_char == '@':
raise NotImplementedError()
elif format_char == '*':
raise NotImplementedError()
elif format_char == 'r':
raise NotImplementedError()
elif format_char == '?':
raise NotImplementedError()
else:
return _VariantCreator._LEAF_CONSTRUCTORS[format_char](arg)
def _pop_format_char(self):
format_char = self._format_string[0]
self._format_string = self._format_string[1:]
return format_char
def _pop_leaf_format_string(self):
# FIXME: This will break when the leaf is inside a tuple or dict entry
format_string = self._format_string
self._format_string = ''
return format_string
def _pop_arg(self):
arg = self._args[0]
self._args = self._args[1:]
return arg
class Variant(GLib.Variant):
def __new__(cls, format_string, *args):
creator = _VariantCreator(format_string, args)
return creator.create()
def __repr__(self):
return '<GLib.Variant(%s)>' % getattr(self, 'print')(True)
@classmethod
def new_tuple(cls, *elements):
return variant_new_tuple(elements)
def get_string(self):
value, length = GLib.Variant.get_string(self)
return value
setattr(Variant, 'new_tuple', new_tuple)
setattr(Variant, 'get_string', get_string)
__all__.append('Variant')
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