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Edit File : GObject.py \| Size : 25.43 KB
# -- Mode: Python; py-indent-offset: 4 -- # vim: tabstop=4 shiftwidth=4 expandtab # # Copyright (C) 2012 Canonical Ltd. # Author: Martin Pitt <martin.pitt@ubuntu.com> # Copyright (C) 2012-2013 Simon Feltman <sfeltman@src.gnome.org> # Copyright (C) 2012 Bastian Winkler <buz@netbuz.org> # # 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 import sys import warnings from collections import namedtuple import gi.overrides import gi.module from gi.overrides import override, deprecated_attr from gi.repository import GLib from gi import PyGIDeprecationWarning from gi import _propertyhelper as propertyhelper from gi import _signalhelper as signalhelper from gi import _gi GObjectModule = gi.module.get_introspection_module('GObject') __all__ = [] from gi import _option as option option = option # API aliases for backwards compatibility for name in ['markup_escape_text', 'get_application_name', 'set_application_name', 'get_prgname', 'set_prgname', 'main_depth', 'filename_display_basename', 'filename_display_name', 'filename_from_utf8', 'uri_list_extract_uris', 'MainLoop', 'MainContext', 'main_context_default', 'source_remove', 'Source', 'Idle', 'Timeout', 'PollFD', 'idle_add', 'timeout_add', 'timeout_add_seconds', 'io_add_watch', 'child_watch_add', 'get_current_time', 'spawn_async']: globals()[name] = getattr(GLib, name) deprecated_attr("GObject", name, "GLib." + name) __all__.append(name) # deprecated constants for name in ['PRIORITY_DEFAULT', 'PRIORITY_DEFAULT_IDLE', 'PRIORITY_HIGH', 'PRIORITY_HIGH_IDLE', 'PRIORITY_LOW', 'IO_IN', 'IO_OUT', 'IO_PRI', 'IO_ERR', 'IO_HUP', 'IO_NVAL', 'IO_STATUS_ERROR', 'IO_STATUS_NORMAL', 'IO_STATUS_EOF', 'IO_STATUS_AGAIN', 'IO_FLAG_APPEND', 'IO_FLAG_NONBLOCK', 'IO_FLAG_IS_READABLE', 'IO_FLAG_IS_WRITEABLE', 'IO_FLAG_IS_SEEKABLE', 'IO_FLAG_MASK', 'IO_FLAG_GET_MASK', 'IO_FLAG_SET_MASK', 'SPAWN_LEAVE_DESCRIPTORS_OPEN', 'SPAWN_DO_NOT_REAP_CHILD', 'SPAWN_SEARCH_PATH', 'SPAWN_STDOUT_TO_DEV_NULL', 'SPAWN_STDERR_TO_DEV_NULL', 'SPAWN_CHILD_INHERITS_STDIN', 'SPAWN_FILE_AND_ARGV_ZERO', 'OPTION_FLAG_HIDDEN', 'OPTION_FLAG_IN_MAIN', 'OPTION_FLAG_REVERSE', 'OPTION_FLAG_NO_ARG', 'OPTION_FLAG_FILENAME', 'OPTION_FLAG_OPTIONAL_ARG', 'OPTION_FLAG_NOALIAS', 'OPTION_ERROR_UNKNOWN_OPTION', 'OPTION_ERROR_BAD_VALUE', 'OPTION_ERROR_FAILED', 'OPTION_REMAINING', 'glib_version']: with warnings.catch_warnings(): # TODO: this uses deprecated Glib attributes, silence for now warnings.simplefilter('ignore', PyGIDeprecationWarning) globals()[name] = getattr(GLib, name) deprecated_attr("GObject", name, "GLib." + name) __all__.append(name) for name in ['G_MININT8', 'G_MAXINT8', 'G_MAXUINT8', 'G_MININT16', 'G_MAXINT16', 'G_MAXUINT16', 'G_MININT32', 'G_MAXINT32', 'G_MAXUINT32', 'G_MININT64', 'G_MAXINT64', 'G_MAXUINT64']: new_name = name.split("_", 1)[-1] globals()[name] = getattr(GLib, new_name) deprecated_attr("GObject", name, "GLib." + new_name) __all__.append(name) # these are not currently exported in GLib gir, presumably because they are # platform dependent; so get them from our static bindings for name in ['G_MINFLOAT', 'G_MAXFLOAT', 'G_MINDOUBLE', 'G_MAXDOUBLE', 'G_MINSHORT', 'G_MAXSHORT', 'G_MAXUSHORT', 'G_MININT', 'G_MAXINT', 'G_MAXUINT', 'G_MINLONG', 'G_MAXLONG', 'G_MAXULONG', 'G_MAXSIZE', 'G_MINSSIZE', 'G_MAXSSIZE', 'G_MINOFFSET', 'G_MAXOFFSET']: new_name = name.split("_", 1)[-1] globals()[name] = getattr(GLib, new_name) deprecated_attr("GObject", name, "GLib." + new_name) __all__.append(name) TYPE_INVALID = GObjectModule.type_from_name('invalid') TYPE_NONE = GObjectModule.type_from_name('void') TYPE_INTERFACE = GObjectModule.type_from_name('GInterface') TYPE_CHAR = GObjectModule.type_from_name('gchar') TYPE_UCHAR = GObjectModule.type_from_name('guchar') TYPE_BOOLEAN = GObjectModule.type_from_name('gboolean') TYPE_INT = GObjectModule.type_from_name('gint') TYPE_UINT = GObjectModule.type_from_name('guint') TYPE_LONG = GObjectModule.type_from_name('glong') TYPE_ULONG = GObjectModule.type_from_name('gulong') TYPE_INT64 = GObjectModule.type_from_name('gint64') TYPE_UINT64 = GObjectModule.type_from_name('guint64') TYPE_ENUM = GObjectModule.type_from_name('GEnum') TYPE_FLAGS = GObjectModule.type_from_name('GFlags') TYPE_FLOAT = GObjectModule.type_from_name('gfloat') TYPE_DOUBLE = GObjectModule.type_from_name('gdouble') TYPE_STRING = GObjectModule.type_from_name('gchararray') TYPE_POINTER = GObjectModule.type_from_name('gpointer') TYPE_BOXED = GObjectModule.type_from_name('GBoxed') TYPE_PARAM = GObjectModule.type_from_name('GParam') TYPE_OBJECT = GObjectModule.type_from_name('GObject') TYPE_PYOBJECT = GObjectModule.type_from_name('PyObject') TYPE_GTYPE = GObjectModule.type_from_name('GType') TYPE_STRV = GObjectModule.type_from_name('GStrv') TYPE_VARIANT = GObjectModule.type_from_name('GVariant') TYPE_GSTRING = GObjectModule.type_from_name('GString') TYPE_VALUE = GObjectModule.Value.__gtype__ TYPE_UNICHAR = TYPE_UINT __all__ += ['TYPE_INVALID', 'TYPE_NONE', 'TYPE_INTERFACE', 'TYPE_CHAR', 'TYPE_UCHAR', 'TYPE_BOOLEAN', 'TYPE_INT', 'TYPE_UINT', 'TYPE_LONG', 'TYPE_ULONG', 'TYPE_INT64', 'TYPE_UINT64', 'TYPE_ENUM', 'TYPE_FLAGS', 'TYPE_FLOAT', 'TYPE_DOUBLE', 'TYPE_STRING', 'TYPE_POINTER', 'TYPE_BOXED', 'TYPE_PARAM', 'TYPE_OBJECT', 'TYPE_PYOBJECT', 'TYPE_GTYPE', 'TYPE_STRV', 'TYPE_VARIANT', 'TYPE_GSTRING', 'TYPE_UNICHAR', 'TYPE_VALUE'] # Deprecated, use GLib directly for name in ['Pid', 'GError', 'OptionGroup', 'OptionContext']: globals()[name] = getattr(GLib, name) deprecated_attr("GObject", name, "GLib." + name) __all__.append(name) # Deprecated, use: GObject.ParamFlags.* directly for name in ['PARAM_CONSTRUCT', 'PARAM_CONSTRUCT_ONLY', 'PARAM_LAX_VALIDATION', 'PARAM_READABLE', 'PARAM_WRITABLE']: new_name = name.split("_", 1)[-1] globals()[name] = getattr(GObjectModule.ParamFlags, new_name) deprecated_attr("GObject", name, "GObject.ParamFlags." + new_name) __all__.append(name) # PARAM_READWRITE should come from the gi module but cannot due to: # https://bugzilla.gnome.org/show_bug.cgi?id=687615 PARAM_READWRITE = GObjectModule.ParamFlags.READABLE \| \ GObjectModule.ParamFlags.WRITABLE __all__.append("PARAM_READWRITE") # READWRITE is part of ParamFlags since glib 2.42. Only mark PARAM_READWRITE as # deprecated in case ParamFlags.READWRITE is available. Also include the glib # version in the warning so it's clear that this needs a newer glib, unlike # the other ParamFlags related deprecations. # https://bugzilla.gnome.org/show_bug.cgi?id=726037 if hasattr(GObjectModule.ParamFlags, "READWRITE"): deprecated_attr("GObject", "PARAM_READWRITE", "GObject.ParamFlags.READWRITE (glib 2.42+)") # Deprecated, use: GObject.SignalFlags.* directly for name in ['SIGNAL_ACTION', 'SIGNAL_DETAILED', 'SIGNAL_NO_HOOKS', 'SIGNAL_NO_RECURSE', 'SIGNAL_RUN_CLEANUP', 'SIGNAL_RUN_FIRST', 'SIGNAL_RUN_LAST']: new_name = name.split("_", 1)[-1] globals()[name] = getattr(GObjectModule.SignalFlags, new_name) deprecated_attr("GObject", name, "GObject.SignalFlags." + new_name) __all__.append(name) # Static types GBoxed = _gi.GBoxed GEnum = _gi.GEnum GFlags = _gi.GFlags GInterface = _gi.GInterface GObject = _gi.GObject GObjectWeakRef = _gi.GObjectWeakRef GParamSpec = _gi.GParamSpec GPointer = _gi.GPointer GType = _gi.GType Warning = _gi.Warning __all__ += ['GBoxed', 'GEnum', 'GFlags', 'GInterface', 'GObject', 'GObjectWeakRef', 'GParamSpec', 'GPointer', 'GType', 'Warning'] features = _gi.features list_properties = _gi.list_properties new = _gi.new pygobject_version = _gi.pygobject_version threads_init = GLib.threads_init type_register = _gi.type_register __all__ += ['features', 'list_properties', 'new', 'pygobject_version', 'threads_init', 'type_register'] class Value(GObjectModule.Value): def __init__(self, value_type=None, py_value=None): GObjectModule.Value.__init__(self) if value_type is not None: self.init(value_type) if py_value is not None: self.set_value(py_value) def __del__(self): if self._free_on_dealloc and self.g_type != TYPE_INVALID: self.unset() # We must call base class __del__() after unset. super(Value, self).__del__() def set_boxed(self, boxed): # Workaround the introspection marshalers inability to know # these methods should be marshaling boxed types. This is because # the type information is stored on the GValue. _gi._gvalue_set(self, boxed) def get_boxed(self): return _gi._gvalue_get(self) def set_value(self, py_value): gtype = self.g_type if gtype == _gi.TYPE_INVALID: raise TypeError("GObject.Value needs to be initialized first") elif gtype == TYPE_BOOLEAN: self.set_boolean(py_value) elif gtype == TYPE_CHAR: self.set_char(py_value) elif gtype == TYPE_UCHAR: self.set_uchar(py_value) elif gtype == TYPE_INT: self.set_int(py_value) elif gtype == TYPE_UINT: self.set_uint(py_value) elif gtype == TYPE_LONG: self.set_long(py_value) elif gtype == TYPE_ULONG: self.set_ulong(py_value) elif gtype == TYPE_INT64: self.set_int64(py_value) elif gtype == TYPE_UINT64: self.set_uint64(py_value) elif gtype == TYPE_FLOAT: self.set_float(py_value) elif gtype == TYPE_DOUBLE: self.set_double(py_value) elif gtype == TYPE_STRING: if isinstance(py_value, str): py_value = str(py_value) elif sys.version_info < (3, 0): if isinstance(py_value, unicode): py_value = py_value.encode('UTF-8') else: raise ValueError("Expected string or unicode but got %s%s" % (py_value, type(py_value))) else: raise ValueError("Expected string but got %s%s" % (py_value, type(py_value))) self.set_string(py_value) elif gtype == TYPE_PARAM: self.set_param(py_value) elif gtype.is_a(TYPE_ENUM): self.set_enum(py_value) elif gtype.is_a(TYPE_FLAGS): self.set_flags(py_value) elif gtype.is_a(TYPE_BOXED): self.set_boxed(py_value) elif gtype == TYPE_POINTER: self.set_pointer(py_value) elif gtype.is_a(TYPE_OBJECT): self.set_object(py_value) elif gtype == TYPE_UNICHAR: self.set_uint(int(py_value)) # elif gtype == TYPE_OVERRIDE: # pass elif gtype == TYPE_GTYPE: self.set_gtype(py_value) elif gtype == TYPE_VARIANT: self.set_variant(py_value) elif gtype == TYPE_PYOBJECT: self.set_boxed(py_value) else: raise TypeError("Unknown value type %s" % gtype) def get_value(self): gtype = self.g_type if gtype == TYPE_BOOLEAN: return self.get_boolean() elif gtype == TYPE_CHAR: return self.get_char() elif gtype == TYPE_UCHAR: return self.get_uchar() elif gtype == TYPE_INT: return self.get_int() elif gtype == TYPE_UINT: return self.get_uint() elif gtype == TYPE_LONG: return self.get_long() elif gtype == TYPE_ULONG: return self.get_ulong() elif gtype == TYPE_INT64: return self.get_int64() elif gtype == TYPE_UINT64: return self.get_uint64() elif gtype == TYPE_FLOAT: return self.get_float() elif gtype == TYPE_DOUBLE: return self.get_double() elif gtype == TYPE_STRING: return self.get_string() elif gtype == TYPE_PARAM: return self.get_param() elif gtype.is_a(TYPE_ENUM): return self.get_enum() elif gtype.is_a(TYPE_FLAGS): return self.get_flags() elif gtype.is_a(TYPE_BOXED): return self.get_boxed() elif gtype == TYPE_POINTER: return self.get_pointer() elif gtype.is_a(TYPE_OBJECT): return self.get_object() elif gtype == TYPE_UNICHAR: return self.get_uint() elif gtype == TYPE_GTYPE: return self.get_gtype() elif gtype == TYPE_VARIANT: return self.get_variant() elif gtype == TYPE_PYOBJECT: pass else: return None def __repr__(self): return '<Value (%s) %s>' % (self.g_type.name, self.get_value()) Value = override(Value) __all__.append('Value') def type_from_name(name): type_ = GObjectModule.type_from_name(name) if type_ == TYPE_INVALID: raise RuntimeError('unknown type name: %s' % name) return type_ __all__.append('type_from_name') def type_parent(type_): parent = GObjectModule.type_parent(type_) if parent == TYPE_INVALID: raise RuntimeError('no parent for type') return parent __all__.append('type_parent') def _validate_type_for_signal_method(type_): if hasattr(type_, '__gtype__'): type_ = type_.__gtype__ if not type_.is_instantiatable() and not type_.is_interface(): raise TypeError('type must be instantiable or an interface, got %s' % type_) def signal_list_ids(type_): _validate_type_for_signal_method(type_) return GObjectModule.signal_list_ids(type_) __all__.append('signal_list_ids') def signal_list_names(type_): ids = signal_list_ids(type_) return tuple(GObjectModule.signal_name(i) for i in ids) __all__.append('signal_list_names') def signal_lookup(name, type_): _validate_type_for_signal_method(type_) return GObjectModule.signal_lookup(name, type_) __all__.append('signal_lookup') SignalQuery = namedtuple('SignalQuery', ['signal_id', 'signal_name', 'itype', 'signal_flags', 'return_type', # n_params', 'param_types']) def signal_query(id_or_name, type_=None): if type_ is not None: id_or_name = signal_lookup(id_or_name, type_) res = GObjectModule.signal_query(id_or_name) if res is None: return None if res.signal_id == 0: return None # Return a named tuple to allows indexing which is compatible with the # static bindings along with field like access of the gi struct. # Note however that the n_params was not returned from the static bindings # so we must skip over it. return SignalQuery(res.signal_id, res.signal_name, res.itype, res.signal_flags, res.return_type, tuple(res.param_types)) __all__.append('signal_query') class _HandlerBlockManager(object): def __init__(self, obj, handler_id): self.obj = obj self.handler_id = handler_id def __enter__(self): pass def __exit__(self, exc_type, exc_value, traceback): GObjectModule.signal_handler_unblock(self.obj, self.handler_id) def signal_handler_block(obj, handler_id): """Blocks the signal handler from being invoked until handler_unblock() is called. :param GObject.Object obj: Object instance to block handlers for. :param int handler_id: Id of signal to block. :returns: A context manager which optionally can be used to automatically unblock the handler: .. code-block:: python with GObject.signal_handler_block(obj, id): pass """ GObjectModule.signal_handler_block(obj, handler_id) return _HandlerBlockManager(obj, handler_id) __all__.append('signal_handler_block') def signal_parse_name(detailed_signal, itype, force_detail_quark): """Parse a detailed signal name into (signal_id, detail). :param str detailed_signal: Signal name which can include detail. For example: "notify:prop_name" :returns: Tuple of (signal_id, detail) :raises ValueError: If the given signal is unknown. """ res, signal_id, detail = GObjectModule.signal_parse_name(detailed_signal, itype, force_detail_quark) if res: return signal_id, detail else: raise ValueError('%s: unknown signal name: %s' % (itype, detailed_signal)) __all__.append('signal_parse_name') def remove_emission_hook(obj, detailed_signal, hook_id): signal_id, detail = signal_parse_name(detailed_signal, obj, True) GObjectModule.signal_remove_emission_hook(signal_id, hook_id) __all__.append('remove_emission_hook') # GObject accumulators with pure Python implementations # These return a tuple of (continue_emission, accumulation_result) def signal_accumulator_first_wins(ihint, return_accu, handler_return, user_data=None): # Stop emission but return the result of the last handler return (False, handler_return) __all__.append('signal_accumulator_first_wins') def signal_accumulator_true_handled(ihint, return_accu, handler_return, user_data=None): # Stop emission if the last handler returns True return (not handler_return, handler_return) __all__.append('signal_accumulator_true_handled') # Statically bound signal functions which need to clobber GI (for now) add_emission_hook = _gi.add_emission_hook signal_new = _gi.signal_new __all__ += ['add_emission_hook', 'signal_new'] class _FreezeNotifyManager(object): def __init__(self, obj): self.obj = obj def __enter__(self): pass def __exit__(self, exc_type, exc_value, traceback): self.obj.thaw_notify() def _signalmethod(func): # Function wrapper for signal functions used as instance methods. # This is needed when the signal functions come directly from GI. # (they are not already wrapped) @gi.overrides.wraps(func) def meth(args, kwargs): return func(args, *kwargs) return meth class Object(GObjectModule.Object): def _unsupported_method(self, args, *kargs): raise RuntimeError('This method is currently unsupported.') def _unsupported_data_method(self, args, *kargs): raise RuntimeError('Data access methods are unsupported. ' 'Use normal Python attributes instead') # Generic data methods are not needed in python as it can be handled # with standard attribute access: https://bugzilla.gnome.org/show_bug.cgi?id=641944 get_data = _unsupported_data_method get_qdata = _unsupported_data_method set_data = _unsupported_data_method steal_data = _unsupported_data_method steal_qdata = _unsupported_data_method replace_data = _unsupported_data_method replace_qdata = _unsupported_data_method # The following methods as unsupported until we verify # they work as gi methods. bind_property_full = _unsupported_method compat_control = _unsupported_method interface_find_property = _unsupported_method interface_install_property = _unsupported_method interface_list_properties = _unsupported_method notify_by_pspec = _unsupported_method run_dispose = _unsupported_method watch_closure = _unsupported_method # Make all reference management methods private but still accessible. _ref = GObjectModule.Object.ref _ref_sink = GObjectModule.Object.ref_sink _unref = GObjectModule.Object.unref _force_floating = GObjectModule.Object.force_floating ref = _unsupported_method ref_sink = _unsupported_method unref = _unsupported_method force_floating = _unsupported_method # The following methods are static APIs which need to leap frog the # gi methods until we verify the gi methods can replace them. get_property = _gi.GObject.get_property get_properties = _gi.GObject.get_properties set_property = _gi.GObject.set_property set_properties = _gi.GObject.set_properties bind_property = _gi.GObject.bind_property connect = _gi.GObject.connect connect_after = _gi.GObject.connect_after connect_object = _gi.GObject.connect_object connect_object_after = _gi.GObject.connect_object_after disconnect_by_func = _gi.GObject.disconnect_by_func handler_block_by_func = _gi.GObject.handler_block_by_func handler_unblock_by_func = _gi.GObject.handler_unblock_by_func emit = _gi.GObject.emit chain = _gi.GObject.chain weak_ref = _gi.GObject.weak_ref __copy__ = _gi.GObject.__copy__ __deepcopy__ = _gi.GObject.__deepcopy__ def freeze_notify(self): """Freezes the object's property-changed notification queue. :returns: A context manager which optionally can be used to automatically thaw notifications. This will freeze the object so that "notify" signals are blocked until the thaw_notify() method is called. .. code-block:: python with obj.freeze_notify(): pass """ super(Object, self).freeze_notify() return _FreezeNotifyManager(self) def connect_data(self, detailed_signal, handler, data, *kwargs): """Connect a callback to the given signal with optional user data. :param str detailed_signal: A detailed signal to connect to. :param callable handler: Callback handler to connect to the signal. :param data: Variable data which is passed through to the signal handler. :param GObject.ConnectFlags connect_flags: Flags used for connection options. :returns: A signal id which can be used with disconnect. """ flags = kwargs.get('connect_flags', 0) if flags & GObjectModule.ConnectFlags.AFTER: connect_func = _gi.GObject.connect_after else: connect_func = _gi.GObject.connect if flags & GObjectModule.ConnectFlags.SWAPPED: if len(data) != 1: raise ValueError('Using GObject.ConnectFlags.SWAPPED requires exactly ' 'one argument for user data, got: %s' % [data]) def new_handler(obj, args): # Swap obj with the last element in args which will be the user # data passed to the connect function. args = list(args) swap = args.pop() args = args + [obj] return handler(swap, args) else: new_handler = handler return connect_func(self, detailed_signal, new_handler, *data) # # Aliases # handler_block = signal_handler_block handler_unblock = _signalmethod(GObjectModule.signal_handler_unblock) disconnect = _signalmethod(GObjectModule.signal_handler_disconnect) handler_disconnect = _signalmethod(GObjectModule.signal_handler_disconnect) handler_is_connected = _signalmethod(GObjectModule.signal_handler_is_connected) stop_emission_by_name = _signalmethod(GObjectModule.signal_stop_emission_by_name) # # Deprecated Methods # def stop_emission(self, detailed_signal): """Deprecated, please use stop_emission_by_name.""" warnings.warn(self.stop_emission.__doc__, PyGIDeprecationWarning, stacklevel=2) return self.stop_emission_by_name(detailed_signal) emit_stop_by_name = stop_emission Object = override(Object) GObject = Object __all__ += ['Object', 'GObject'] class Binding(GObjectModule.Binding): def __call__(self): warnings.warn('Using parentheses (binding()) to retrieve the Binding object is no ' 'longer needed because the binding is returned directly from "bind_property.', PyGIDeprecationWarning, stacklevel=2) return self def unbind(self): if hasattr(self, '_unbound'): raise ValueError('binding has already been cleared out') else: setattr(self, '_unbound', True) super(Binding, self).unbind() Binding = override(Binding) __all__.append('Binding') Property = propertyhelper.Property Signal = signalhelper.Signal SignalOverride = signalhelper.SignalOverride # Deprecated naming "property" available for backwards compatibility. # Keep this at the end of the file to avoid clobbering the builtin. property = Property deprecated_attr("GObject", "property", "GObject.Property") __all__ += ['Property', 'Signal', 'SignalOverride', 'property'] Back

Edit File : GObject.py | Size : 25.43 KB

# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@ubuntu.com>
# Copyright (C) 2012-2013 Simon Feltman <sfeltman@src.gnome.org>
# Copyright (C) 2012 Bastian Winkler <buz@netbuz.org>
#
# 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

import sys
import warnings
from collections import namedtuple

import gi.overrides
import gi.module
from gi.overrides import override, deprecated_attr
from gi.repository import GLib
from gi import PyGIDeprecationWarning

from gi import _propertyhelper as propertyhelper
from gi import _signalhelper as signalhelper
from gi import _gi

GObjectModule = gi.module.get_introspection_module('GObject')

__all__ = []

from gi import _option as option
option = option

# API aliases for backwards compatibility
for name in ['markup_escape_text', 'get_application_name',
             'set_application_name', 'get_prgname', 'set_prgname',
             'main_depth', 'filename_display_basename',
             'filename_display_name', 'filename_from_utf8',
             'uri_list_extract_uris',
             'MainLoop', 'MainContext', 'main_context_default',
             'source_remove', 'Source', 'Idle', 'Timeout', 'PollFD',
             'idle_add', 'timeout_add', 'timeout_add_seconds',
             'io_add_watch', 'child_watch_add', 'get_current_time',
             'spawn_async']:
    globals()[name] = getattr(GLib, name)
    deprecated_attr("GObject", name, "GLib." + name)
    __all__.append(name)

# deprecated constants
for name in ['PRIORITY_DEFAULT', 'PRIORITY_DEFAULT_IDLE', 'PRIORITY_HIGH',
             'PRIORITY_HIGH_IDLE', 'PRIORITY_LOW',
             'IO_IN', 'IO_OUT', 'IO_PRI', 'IO_ERR', 'IO_HUP', 'IO_NVAL',
             'IO_STATUS_ERROR', 'IO_STATUS_NORMAL', 'IO_STATUS_EOF',
             'IO_STATUS_AGAIN', 'IO_FLAG_APPEND', 'IO_FLAG_NONBLOCK',
             'IO_FLAG_IS_READABLE', 'IO_FLAG_IS_WRITEABLE',
             'IO_FLAG_IS_SEEKABLE', 'IO_FLAG_MASK', 'IO_FLAG_GET_MASK',
             'IO_FLAG_SET_MASK',
             'SPAWN_LEAVE_DESCRIPTORS_OPEN', 'SPAWN_DO_NOT_REAP_CHILD',
             'SPAWN_SEARCH_PATH', 'SPAWN_STDOUT_TO_DEV_NULL',
             'SPAWN_STDERR_TO_DEV_NULL', 'SPAWN_CHILD_INHERITS_STDIN',
             'SPAWN_FILE_AND_ARGV_ZERO',
             'OPTION_FLAG_HIDDEN', 'OPTION_FLAG_IN_MAIN', 'OPTION_FLAG_REVERSE',
             'OPTION_FLAG_NO_ARG', 'OPTION_FLAG_FILENAME', 'OPTION_FLAG_OPTIONAL_ARG',
             'OPTION_FLAG_NOALIAS', 'OPTION_ERROR_UNKNOWN_OPTION',
             'OPTION_ERROR_BAD_VALUE', 'OPTION_ERROR_FAILED', 'OPTION_REMAINING',
             'glib_version']:
    with warnings.catch_warnings():
        # TODO: this uses deprecated Glib attributes, silence for now
        warnings.simplefilter('ignore', PyGIDeprecationWarning)
        globals()[name] = getattr(GLib, name)
    deprecated_attr("GObject", name, "GLib." + name)
    __all__.append(name)

for name in ['G_MININT8', 'G_MAXINT8', 'G_MAXUINT8', 'G_MININT16',
             'G_MAXINT16', 'G_MAXUINT16', 'G_MININT32', 'G_MAXINT32',
             'G_MAXUINT32', 'G_MININT64', 'G_MAXINT64', 'G_MAXUINT64']:
    new_name = name.split("_", 1)[-1]
    globals()[name] = getattr(GLib, new_name)
    deprecated_attr("GObject", name, "GLib." + new_name)
    __all__.append(name)

# these are not currently exported in GLib gir, presumably because they are
# platform dependent; so get them from our static bindings
for name in ['G_MINFLOAT', 'G_MAXFLOAT', 'G_MINDOUBLE', 'G_MAXDOUBLE',
             'G_MINSHORT', 'G_MAXSHORT', 'G_MAXUSHORT', 'G_MININT', 'G_MAXINT',
             'G_MAXUINT', 'G_MINLONG', 'G_MAXLONG', 'G_MAXULONG', 'G_MAXSIZE',
             'G_MINSSIZE', 'G_MAXSSIZE', 'G_MINOFFSET', 'G_MAXOFFSET']:
    new_name = name.split("_", 1)[-1]
    globals()[name] = getattr(GLib, new_name)
    deprecated_attr("GObject", name, "GLib." + new_name)
    __all__.append(name)

TYPE_INVALID = GObjectModule.type_from_name('invalid')
TYPE_NONE = GObjectModule.type_from_name('void')
TYPE_INTERFACE = GObjectModule.type_from_name('GInterface')
TYPE_CHAR = GObjectModule.type_from_name('gchar')
TYPE_UCHAR = GObjectModule.type_from_name('guchar')
TYPE_BOOLEAN = GObjectModule.type_from_name('gboolean')
TYPE_INT = GObjectModule.type_from_name('gint')
TYPE_UINT = GObjectModule.type_from_name('guint')
TYPE_LONG = GObjectModule.type_from_name('glong')
TYPE_ULONG = GObjectModule.type_from_name('gulong')
TYPE_INT64 = GObjectModule.type_from_name('gint64')
TYPE_UINT64 = GObjectModule.type_from_name('guint64')
TYPE_ENUM = GObjectModule.type_from_name('GEnum')
TYPE_FLAGS = GObjectModule.type_from_name('GFlags')
TYPE_FLOAT = GObjectModule.type_from_name('gfloat')
TYPE_DOUBLE = GObjectModule.type_from_name('gdouble')
TYPE_STRING = GObjectModule.type_from_name('gchararray')
TYPE_POINTER = GObjectModule.type_from_name('gpointer')
TYPE_BOXED = GObjectModule.type_from_name('GBoxed')
TYPE_PARAM = GObjectModule.type_from_name('GParam')
TYPE_OBJECT = GObjectModule.type_from_name('GObject')
TYPE_PYOBJECT = GObjectModule.type_from_name('PyObject')
TYPE_GTYPE = GObjectModule.type_from_name('GType')
TYPE_STRV = GObjectModule.type_from_name('GStrv')
TYPE_VARIANT = GObjectModule.type_from_name('GVariant')
TYPE_GSTRING = GObjectModule.type_from_name('GString')
TYPE_VALUE = GObjectModule.Value.__gtype__
TYPE_UNICHAR = TYPE_UINT
__all__ += ['TYPE_INVALID', 'TYPE_NONE', 'TYPE_INTERFACE', 'TYPE_CHAR',
            'TYPE_UCHAR', 'TYPE_BOOLEAN', 'TYPE_INT', 'TYPE_UINT', 'TYPE_LONG',
            'TYPE_ULONG', 'TYPE_INT64', 'TYPE_UINT64', 'TYPE_ENUM', 'TYPE_FLAGS',
            'TYPE_FLOAT', 'TYPE_DOUBLE', 'TYPE_STRING', 'TYPE_POINTER',
            'TYPE_BOXED', 'TYPE_PARAM', 'TYPE_OBJECT', 'TYPE_PYOBJECT',
            'TYPE_GTYPE', 'TYPE_STRV', 'TYPE_VARIANT', 'TYPE_GSTRING',
            'TYPE_UNICHAR', 'TYPE_VALUE']

# Deprecated, use GLib directly
for name in ['Pid', 'GError', 'OptionGroup', 'OptionContext']:
    globals()[name] = getattr(GLib, name)
    deprecated_attr("GObject", name, "GLib." + name)
    __all__.append(name)

# Deprecated, use: GObject.ParamFlags.* directly
for name in ['PARAM_CONSTRUCT', 'PARAM_CONSTRUCT_ONLY', 'PARAM_LAX_VALIDATION',
             'PARAM_READABLE', 'PARAM_WRITABLE']:
    new_name = name.split("_", 1)[-1]
    globals()[name] = getattr(GObjectModule.ParamFlags, new_name)
    deprecated_attr("GObject", name, "GObject.ParamFlags." + new_name)
    __all__.append(name)

# PARAM_READWRITE should come from the gi module but cannot due to:
# https://bugzilla.gnome.org/show_bug.cgi?id=687615
PARAM_READWRITE = GObjectModule.ParamFlags.READABLE | \
    GObjectModule.ParamFlags.WRITABLE
__all__.append("PARAM_READWRITE")

# READWRITE is part of ParamFlags since glib 2.42. Only mark PARAM_READWRITE as
# deprecated in case ParamFlags.READWRITE is available. Also include the glib
# version in the warning so it's clear that this needs a newer glib, unlike
# the other ParamFlags related deprecations.
# https://bugzilla.gnome.org/show_bug.cgi?id=726037
if hasattr(GObjectModule.ParamFlags, "READWRITE"):
    deprecated_attr("GObject", "PARAM_READWRITE",
                    "GObject.ParamFlags.READWRITE (glib 2.42+)")

# Deprecated, use: GObject.SignalFlags.* directly
for name in ['SIGNAL_ACTION', 'SIGNAL_DETAILED', 'SIGNAL_NO_HOOKS',
             'SIGNAL_NO_RECURSE', 'SIGNAL_RUN_CLEANUP', 'SIGNAL_RUN_FIRST',
             'SIGNAL_RUN_LAST']:
    new_name = name.split("_", 1)[-1]
    globals()[name] = getattr(GObjectModule.SignalFlags, new_name)
    deprecated_attr("GObject", name, "GObject.SignalFlags." + new_name)
    __all__.append(name)

# Static types
GBoxed = _gi.GBoxed
GEnum = _gi.GEnum
GFlags = _gi.GFlags
GInterface = _gi.GInterface
GObject = _gi.GObject
GObjectWeakRef = _gi.GObjectWeakRef
GParamSpec = _gi.GParamSpec
GPointer = _gi.GPointer
GType = _gi.GType
Warning = _gi.Warning
__all__ += ['GBoxed', 'GEnum', 'GFlags', 'GInterface', 'GObject',
            'GObjectWeakRef', 'GParamSpec', 'GPointer', 'GType',
            'Warning']

features = _gi.features
list_properties = _gi.list_properties
new = _gi.new
pygobject_version = _gi.pygobject_version
threads_init = GLib.threads_init
type_register = _gi.type_register
__all__ += ['features', 'list_properties', 'new',
            'pygobject_version', 'threads_init', 'type_register']

class Value(GObjectModule.Value):
    def __init__(self, value_type=None, py_value=None):
        GObjectModule.Value.__init__(self)
        if value_type is not None:
            self.init(value_type)
            if py_value is not None:
                self.set_value(py_value)

def __del__(self):
        if self._free_on_dealloc and self.g_type != TYPE_INVALID:
            self.unset()

# We must call base class __del__() after unset.
        super(Value, self).__del__()

def set_boxed(self, boxed):
        # Workaround the introspection marshalers inability to know
        # these methods should be marshaling boxed types. This is because
        # the type information is stored on the GValue.
        _gi._gvalue_set(self, boxed)

def get_boxed(self):
        return _gi._gvalue_get(self)

def set_value(self, py_value):
        gtype = self.g_type

if gtype == _gi.TYPE_INVALID:
            raise TypeError("GObject.Value needs to be initialized first")
        elif gtype == TYPE_BOOLEAN:
            self.set_boolean(py_value)
        elif gtype == TYPE_CHAR:
            self.set_char(py_value)
        elif gtype == TYPE_UCHAR:
            self.set_uchar(py_value)
        elif gtype == TYPE_INT:
            self.set_int(py_value)
        elif gtype == TYPE_UINT:
            self.set_uint(py_value)
        elif gtype == TYPE_LONG:
            self.set_long(py_value)
        elif gtype == TYPE_ULONG:
            self.set_ulong(py_value)
        elif gtype == TYPE_INT64:
            self.set_int64(py_value)
        elif gtype == TYPE_UINT64:
            self.set_uint64(py_value)
        elif gtype == TYPE_FLOAT:
            self.set_float(py_value)
        elif gtype == TYPE_DOUBLE:
            self.set_double(py_value)
        elif gtype == TYPE_STRING:
            if isinstance(py_value, str):
                py_value = str(py_value)
            elif sys.version_info < (3, 0):
                if isinstance(py_value, unicode):
                    py_value = py_value.encode('UTF-8')
                else:
                    raise ValueError("Expected string or unicode but got %s%s" %
                                     (py_value, type(py_value)))
            else:
                raise ValueError("Expected string but got %s%s" %
                                 (py_value, type(py_value)))
            self.set_string(py_value)
        elif gtype == TYPE_PARAM:
            self.set_param(py_value)
        elif gtype.is_a(TYPE_ENUM):
            self.set_enum(py_value)
        elif gtype.is_a(TYPE_FLAGS):
            self.set_flags(py_value)
        elif gtype.is_a(TYPE_BOXED):
            self.set_boxed(py_value)
        elif gtype == TYPE_POINTER:
            self.set_pointer(py_value)
        elif gtype.is_a(TYPE_OBJECT):
            self.set_object(py_value)
        elif gtype == TYPE_UNICHAR:
            self.set_uint(int(py_value))
        # elif gtype == TYPE_OVERRIDE:
        #     pass
        elif gtype == TYPE_GTYPE:
            self.set_gtype(py_value)
        elif gtype == TYPE_VARIANT:
            self.set_variant(py_value)
        elif gtype == TYPE_PYOBJECT:
            self.set_boxed(py_value)
        else:
            raise TypeError("Unknown value type %s" % gtype)

def get_value(self):
        gtype = self.g_type

if gtype == TYPE_BOOLEAN:
            return self.get_boolean()
        elif gtype == TYPE_CHAR:
            return self.get_char()
        elif gtype == TYPE_UCHAR:
            return self.get_uchar()
        elif gtype == TYPE_INT:
            return self.get_int()
        elif gtype == TYPE_UINT:
            return self.get_uint()
        elif gtype == TYPE_LONG:
            return self.get_long()
        elif gtype == TYPE_ULONG:
            return self.get_ulong()
        elif gtype == TYPE_INT64:
            return self.get_int64()
        elif gtype == TYPE_UINT64:
            return self.get_uint64()
        elif gtype == TYPE_FLOAT:
            return self.get_float()
        elif gtype == TYPE_DOUBLE:
            return self.get_double()
        elif gtype == TYPE_STRING:
            return self.get_string()
        elif gtype == TYPE_PARAM:
            return self.get_param()
        elif gtype.is_a(TYPE_ENUM):
            return self.get_enum()
        elif gtype.is_a(TYPE_FLAGS):
            return self.get_flags()
        elif gtype.is_a(TYPE_BOXED):
            return self.get_boxed()
        elif gtype == TYPE_POINTER:
            return self.get_pointer()
        elif gtype.is_a(TYPE_OBJECT):
            return self.get_object()
        elif gtype == TYPE_UNICHAR:
            return self.get_uint()
        elif gtype == TYPE_GTYPE:
            return self.get_gtype()
        elif gtype == TYPE_VARIANT:
            return self.get_variant()
        elif gtype == TYPE_PYOBJECT:
            pass
        else:
            return None

def __repr__(self):
        return '<Value (%s) %s>' % (self.g_type.name, self.get_value())

Value = override(Value)
__all__.append('Value')

def type_from_name(name):
    type_ = GObjectModule.type_from_name(name)
    if type_ == TYPE_INVALID:
        raise RuntimeError('unknown type name: %s' % name)
    return type_

__all__.append('type_from_name')

def type_parent(type_):
    parent = GObjectModule.type_parent(type_)
    if parent == TYPE_INVALID:
        raise RuntimeError('no parent for type')
    return parent

__all__.append('type_parent')

def _validate_type_for_signal_method(type_):
    if hasattr(type_, '__gtype__'):
        type_ = type_.__gtype__
    if not type_.is_instantiatable() and not type_.is_interface():
        raise TypeError('type must be instantiable or an interface, got %s' % type_)

def signal_list_ids(type_):
    _validate_type_for_signal_method(type_)
    return GObjectModule.signal_list_ids(type_)

__all__.append('signal_list_ids')

def signal_list_names(type_):
    ids = signal_list_ids(type_)
    return tuple(GObjectModule.signal_name(i) for i in ids)

__all__.append('signal_list_names')

def signal_lookup(name, type_):
    _validate_type_for_signal_method(type_)
    return GObjectModule.signal_lookup(name, type_)

__all__.append('signal_lookup')

SignalQuery = namedtuple('SignalQuery',
                         ['signal_id',
                          'signal_name',
                          'itype',
                          'signal_flags',
                          'return_type',
                          # n_params',
                          'param_types'])

def signal_query(id_or_name, type_=None):
    if type_ is not None:
        id_or_name = signal_lookup(id_or_name, type_)

res = GObjectModule.signal_query(id_or_name)
    if res is None:
        return None

if res.signal_id == 0:
        return None

# Return a named tuple to allows indexing which is compatible with the
    # static bindings along with field like access of the gi struct.
    # Note however that the n_params was not returned from the static bindings
    # so we must skip over it.
    return SignalQuery(res.signal_id, res.signal_name, res.itype,
                       res.signal_flags, res.return_type,
                       tuple(res.param_types))

__all__.append('signal_query')

class _HandlerBlockManager(object):
    def __init__(self, obj, handler_id):
        self.obj = obj
        self.handler_id = handler_id

def __enter__(self):
        pass

def __exit__(self, exc_type, exc_value, traceback):
        GObjectModule.signal_handler_unblock(self.obj, self.handler_id)

def signal_handler_block(obj, handler_id):
    """Blocks the signal handler from being invoked until
    handler_unblock() is called.

:param GObject.Object obj:
        Object instance to block handlers for.
    :param int handler_id:
        Id of signal to block.
    :returns:
        A context manager which optionally can be used to
        automatically unblock the handler:

.. code-block:: python

with GObject.signal_handler_block(obj, id):
            pass
    """
    GObjectModule.signal_handler_block(obj, handler_id)
    return _HandlerBlockManager(obj, handler_id)

__all__.append('signal_handler_block')

def signal_parse_name(detailed_signal, itype, force_detail_quark):
    """Parse a detailed signal name into (signal_id, detail).

:param str detailed_signal:
        Signal name which can include detail.
        For example: "notify:prop_name"
    :returns:
        Tuple of (signal_id, detail)
    :raises ValueError:
        If the given signal is unknown.
    """
    res, signal_id, detail = GObjectModule.signal_parse_name(detailed_signal, itype,
                                                             force_detail_quark)
    if res:
        return signal_id, detail
    else:
        raise ValueError('%s: unknown signal name: %s' % (itype, detailed_signal))

__all__.append('signal_parse_name')

def remove_emission_hook(obj, detailed_signal, hook_id):
    signal_id, detail = signal_parse_name(detailed_signal, obj, True)
    GObjectModule.signal_remove_emission_hook(signal_id, hook_id)

__all__.append('remove_emission_hook')

# GObject accumulators with pure Python implementations
# These return a tuple of (continue_emission, accumulation_result)

def signal_accumulator_first_wins(ihint, return_accu, handler_return, user_data=None):
    # Stop emission but return the result of the last handler
    return (False, handler_return)

__all__.append('signal_accumulator_first_wins')

def signal_accumulator_true_handled(ihint, return_accu, handler_return, user_data=None):
    # Stop emission if the last handler returns True
    return (not handler_return, handler_return)

__all__.append('signal_accumulator_true_handled')

# Statically bound signal functions which need to clobber GI (for now)

add_emission_hook = _gi.add_emission_hook
signal_new = _gi.signal_new

__all__ += ['add_emission_hook', 'signal_new']

class _FreezeNotifyManager(object):
    def __init__(self, obj):
        self.obj = obj

def __enter__(self):
        pass

def __exit__(self, exc_type, exc_value, traceback):
        self.obj.thaw_notify()

def _signalmethod(func):
    # Function wrapper for signal functions used as instance methods.
    # This is needed when the signal functions come directly from GI.
    # (they are not already wrapped)
    @gi.overrides.wraps(func)
    def meth(*args, **kwargs):
        return func(*args, **kwargs)
    return meth

class Object(GObjectModule.Object):
    def _unsupported_method(self, *args, **kargs):
        raise RuntimeError('This method is currently unsupported.')

def _unsupported_data_method(self, *args, **kargs):
        raise RuntimeError('Data access methods are unsupported. '
                           'Use normal Python attributes instead')

# Generic data methods are not needed in python as it can be handled
    # with standard attribute access: https://bugzilla.gnome.org/show_bug.cgi?id=641944
    get_data = _unsupported_data_method
    get_qdata = _unsupported_data_method
    set_data = _unsupported_data_method
    steal_data = _unsupported_data_method
    steal_qdata = _unsupported_data_method
    replace_data = _unsupported_data_method
    replace_qdata = _unsupported_data_method

# The following methods as unsupported until we verify
    # they work as gi methods.
    bind_property_full = _unsupported_method
    compat_control = _unsupported_method
    interface_find_property = _unsupported_method
    interface_install_property = _unsupported_method
    interface_list_properties = _unsupported_method
    notify_by_pspec = _unsupported_method
    run_dispose = _unsupported_method
    watch_closure = _unsupported_method

# Make all reference management methods private but still accessible.
    _ref = GObjectModule.Object.ref
    _ref_sink = GObjectModule.Object.ref_sink
    _unref = GObjectModule.Object.unref
    _force_floating = GObjectModule.Object.force_floating

ref = _unsupported_method
    ref_sink = _unsupported_method
    unref = _unsupported_method
    force_floating = _unsupported_method

# The following methods are static APIs which need to leap frog the
    # gi methods until we verify the gi methods can replace them.
    get_property = _gi.GObject.get_property
    get_properties = _gi.GObject.get_properties
    set_property = _gi.GObject.set_property
    set_properties = _gi.GObject.set_properties
    bind_property = _gi.GObject.bind_property
    connect = _gi.GObject.connect
    connect_after = _gi.GObject.connect_after
    connect_object = _gi.GObject.connect_object
    connect_object_after = _gi.GObject.connect_object_after
    disconnect_by_func = _gi.GObject.disconnect_by_func
    handler_block_by_func = _gi.GObject.handler_block_by_func
    handler_unblock_by_func = _gi.GObject.handler_unblock_by_func
    emit = _gi.GObject.emit
    chain = _gi.GObject.chain
    weak_ref = _gi.GObject.weak_ref
    __copy__ = _gi.GObject.__copy__
    __deepcopy__ = _gi.GObject.__deepcopy__

def freeze_notify(self):
        """Freezes the object's property-changed notification queue.

:returns:
            A context manager which optionally can be used to
            automatically thaw notifications.

This will freeze the object so that "notify" signals are blocked until
        the thaw_notify() method is called.

.. code-block:: python

with obj.freeze_notify():
                pass
        """
        super(Object, self).freeze_notify()
        return _FreezeNotifyManager(self)

def connect_data(self, detailed_signal, handler, *data, **kwargs):
        """Connect a callback to the given signal with optional user data.

:param str detailed_signal:
            A detailed signal to connect to.
        :param callable handler:
            Callback handler to connect to the signal.
        :param *data:
            Variable data which is passed through to the signal handler.
        :param GObject.ConnectFlags connect_flags:
            Flags used for connection options.
        :returns:
            A signal id which can be used with disconnect.
        """
        flags = kwargs.get('connect_flags', 0)
        if flags & GObjectModule.ConnectFlags.AFTER:
            connect_func = _gi.GObject.connect_after
        else:
            connect_func = _gi.GObject.connect

if flags & GObjectModule.ConnectFlags.SWAPPED:
            if len(data) != 1:
                raise ValueError('Using GObject.ConnectFlags.SWAPPED requires exactly '
                                 'one argument for user data, got: %s' % [data])

def new_handler(obj, *args):
                # Swap obj with the last element in args which will be the user
                # data passed to the connect function.
                args = list(args)
                swap = args.pop()
                args = args + [obj]
                return handler(swap, *args)
        else:
            new_handler = handler

return connect_func(self, detailed_signal, new_handler, *data)

#
    # Aliases
    #

handler_block = signal_handler_block
    handler_unblock = _signalmethod(GObjectModule.signal_handler_unblock)
    disconnect = _signalmethod(GObjectModule.signal_handler_disconnect)
    handler_disconnect = _signalmethod(GObjectModule.signal_handler_disconnect)
    handler_is_connected = _signalmethod(GObjectModule.signal_handler_is_connected)
    stop_emission_by_name = _signalmethod(GObjectModule.signal_stop_emission_by_name)

#
    # Deprecated Methods
    #

def stop_emission(self, detailed_signal):
        """Deprecated, please use stop_emission_by_name."""
        warnings.warn(self.stop_emission.__doc__, PyGIDeprecationWarning, stacklevel=2)
        return self.stop_emission_by_name(detailed_signal)

emit_stop_by_name = stop_emission

Object = override(Object)
GObject = Object
__all__ += ['Object', 'GObject']

class Binding(GObjectModule.Binding):
    def __call__(self):
        warnings.warn('Using parentheses (binding()) to retrieve the Binding object is no '
                      'longer needed because the binding is returned directly from "bind_property.',
                      PyGIDeprecationWarning, stacklevel=2)
        return self

def unbind(self):
        if hasattr(self, '_unbound'):
            raise ValueError('binding has already been cleared out')
        else:
            setattr(self, '_unbound', True)
            super(Binding, self).unbind()

Binding = override(Binding)
__all__.append('Binding')

Property = propertyhelper.Property
Signal = signalhelper.Signal
SignalOverride = signalhelper.SignalOverride
# Deprecated naming "property" available for backwards compatibility.
# Keep this at the end of the file to avoid clobbering the builtin.
property = Property
deprecated_attr("GObject", "property", "GObject.Property")
__all__ += ['Property', 'Signal', 'SignalOverride', 'property']

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