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# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2013 Simon Feltman <sfeltman@gnome.org>
#
# docstring.py: documentation string generator for gi.
#
# 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 ._gi import \
VFuncInfo, \
FunctionInfo, \
CallableInfo, \
ObjectInfo, \
StructInfo, \
Direction, \
TypeTag
#: Module storage for currently registered doc string generator function.
_generate_doc_string_func = None
def set_doc_string_generator(func):
"""Set doc string generator function
:param callable func:
Callable which takes a GIInfoStruct and returns documentation for it.
"""
global _generate_doc_string_func
_generate_doc_string_func = func
def get_doc_string_generator():
"""Returns the currently registered doc string generator."""
return _generate_doc_string_func
def generate_doc_string(info):
"""Generate a doc string given a GIInfoStruct.
:param gi.types.BaseInfo info:
GI info instance to generate documentation for.
:returns:
Generated documentation as a string.
:rtype: str
This passes the info struct to the currently registered doc string
generator and returns the result.
"""
return _generate_doc_string_func(info)
_type_tag_to_py_type = {TypeTag.BOOLEAN: bool,
TypeTag.INT8: int,
TypeTag.UINT8: int,
TypeTag.INT16: int,
TypeTag.UINT16: int,
TypeTag.INT32: int,
TypeTag.UINT32: int,
TypeTag.INT64: int,
TypeTag.UINT64: int,
TypeTag.FLOAT: float,
TypeTag.DOUBLE: float,
TypeTag.GLIST: list,
TypeTag.GSLIST: list,
TypeTag.ARRAY: list,
TypeTag.GHASH: dict,
TypeTag.UTF8: str,
TypeTag.FILENAME: str,
TypeTag.UNICHAR: str,
TypeTag.INTERFACE: None,
TypeTag.GTYPE: None,
TypeTag.ERROR: None,
TypeTag.VOID: None,
}
def _get_pytype_hint(gi_type):
type_tag = gi_type.get_tag()
py_type = _type_tag_to_py_type.get(type_tag, None)
if py_type and hasattr(py_type, '__name__'):
return py_type.__name__
elif type_tag == TypeTag.INTERFACE:
iface = gi_type.get_interface()
info_name = iface.get_name()
if not info_name:
return gi_type.get_tag_as_string()
return '%s.%s' % (iface.get_namespace(), info_name)
return gi_type.get_tag_as_string()
def _generate_callable_info_doc(info):
in_args_strs = []
if isinstance(info, VFuncInfo):
in_args_strs = ['self']
elif isinstance(info, FunctionInfo):
if info.is_method():
in_args_strs = ['self']
args = info.get_arguments()
hint_blacklist = ('void',)
# Build lists of indices prior to adding the docs because it is possible
# the index retrieved comes before input arguments being used.
ignore_indices = {info.get_return_type().get_array_length()}
user_data_indices = set()
for arg in args:
ignore_indices.add(arg.get_destroy())
ignore_indices.add(arg.get_type().get_array_length())
user_data_indices.add(arg.get_closure())
# Build input argument strings
for i, arg in enumerate(args):
if arg.get_direction() == Direction.OUT:
continue # skip exclusively output args
if i in ignore_indices:
continue
argstr = arg.get_name()
hint = _get_pytype_hint(arg.get_type())
if hint not in hint_blacklist:
argstr += ':' + hint
if arg.may_be_null() or i in user_data_indices:
# allow-none or user_data from a closure
argstr += '=None'
elif arg.is_optional():
argstr += '=<optional>'
in_args_strs.append(argstr)
in_args_str = ', '.join(in_args_strs)
# Build return + output argument strings
out_args_strs = []
return_hint = _get_pytype_hint(info.get_return_type())
if not info.skip_return() and return_hint and return_hint not in hint_blacklist:
argstr = return_hint
if info.may_return_null():
argstr += ' or None'
out_args_strs.append(argstr)
for i, arg in enumerate(args):
if arg.get_direction() == Direction.IN:
continue # skip exclusively input args
if i in ignore_indices:
continue
argstr = arg.get_name()
hint = _get_pytype_hint(arg.get_type())
if hint not in hint_blacklist:
argstr += ':' + hint
out_args_strs.append(argstr)
if out_args_strs:
return '%s(%s) -> %s' % (info.__name__, in_args_str, ', '.join(out_args_strs))
else:
return '%s(%s)' % (info.__name__, in_args_str)
def _generate_class_info_doc(info):
header = '\n:Constructors:\n\n::\n\n' # start with \n to avoid auto indent of other lines
doc = ''
if isinstance(info, StructInfo):
# Don't show default constructor for disguised (0 length) structs
if info.get_size() > 0:
doc += ' ' + info.get_name() + '()\n'
else:
doc += ' ' + info.get_name() + '(**properties)\n'
for method_info in info.get_methods():
if method_info.is_constructor():
doc += ' ' + _generate_callable_info_doc(method_info) + '\n'
if doc:
return header + doc
else:
return ''
def _generate_doc_dispatch(info):
if isinstance(info, (ObjectInfo, StructInfo)):
return _generate_class_info_doc(info)
elif isinstance(info, CallableInfo):
return _generate_callable_info_doc(info)
return ''
set_doc_string_generator(_generate_doc_dispatch)