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docstring.py
# -*- 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 = set() 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)