373 lines
11 KiB
Cython
373 lines
11 KiB
Cython
# Copyright (C) 2007-2014 various contributors (see AUTHORS)
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#
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# This file is part of Python-EFL.
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#
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# Python-EFL is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 3 of the License, or (at your option) any later version.
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#
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# Python-EFL is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this Python-EFL. If not, see <http://www.gnu.org/licenses/>.
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from cpython cimport PyObject, Py_INCREF, Py_DECREF, PyUnicode_AsUTF8String
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from libc.stdint cimport uintptr_t
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from efl.eina cimport Eina_Bool, \
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Eina_Hash, eina_hash_string_superfast_new, eina_hash_add, eina_hash_del, \
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eina_hash_find, EINA_LOG_DOM_DBG, EINA_LOG_DOM_INFO, \
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eina_hash_pointer_new
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from efl.c_eo cimport Eo as cEo, eo_init, eo_shutdown, eo_del, eo_do, \
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eo_class_name_get, eo_class_get, eo_base_class_get,\
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eo_key_data_set, eo_key_data_get, eo_key_data_del, \
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eo_event_callback_add, eo_event_callback_del, EO_EV_DEL, \
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eo_parent_get, eo_parent_set, Eo_Event_Description, \
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eo_event_freeze, eo_event_thaw, eo_event_freeze_count_get, \
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eo_event_global_freeze, eo_event_global_thaw, \
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eo_event_global_freeze_count_get
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cimport efl.eo.enums as enums
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from efl.utils.logger cimport add_logger
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# Set this to public and export it in pxd if you need it in another module
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cdef int PY_EFL_EO_LOG_DOMAIN = add_logger(__name__).eina_log_domain
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cdef int PY_REFCOUNT(object o):
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cdef PyObject *obj = <PyObject *>o
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return obj.ob_refcnt
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######################################################################
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def init():
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EINA_LOG_DOM_INFO(PY_EFL_EO_LOG_DOMAIN, "Initializing efl.eo", NULL)
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return eo_init()
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def shutdown():
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EINA_LOG_DOM_INFO(PY_EFL_EO_LOG_DOMAIN, "Shutting down efl.eo", NULL)
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return eo_shutdown()
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init()
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def event_global_freeze_count_get():
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cdef int fcount
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fcount = <int>eo_do(<const cEo *>eo_base_class_get(),
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eo_event_global_freeze_count_get())
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return fcount
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def event_global_freeze():
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eo_do(<const cEo *>eo_base_class_get(),
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eo_event_global_freeze())
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def event_global_thaw():
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eo_do(<const cEo *>eo_base_class_get(),
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eo_event_global_thaw())
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######################################################################
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"""
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Object mapping is an Eina Hash table into which object type names can be
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registered. These can be used to find a bindings class for an object using
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the function object_from_instance.
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"""
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cdef Eina_Hash *object_mapping = eina_hash_string_superfast_new(NULL)
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cdef void _object_mapping_register(char *name, object cls) except *:
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if eina_hash_find(object_mapping, name) != NULL:
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raise ValueError("Object type name '%s' already registered." % name)
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cdef object cls_name = cls.__name__
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if isinstance(cls_name, unicode): cls_name = PyUnicode_AsUTF8String(cls_name)
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EINA_LOG_DOM_DBG(PY_EFL_EO_LOG_DOMAIN,
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"REGISTER: %s => %s", <char *>name, <char *>cls_name)
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eina_hash_add(object_mapping, name, <PyObject *>cls)
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cdef void _object_mapping_unregister(char *name):
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eina_hash_del(object_mapping, name, NULL)
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cdef api object object_from_instance(cEo *obj):
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""" Create a python object from a C Eo object pointer. """
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cdef:
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void *data
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Eo o
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const char *cls_name = eo_class_name_get(eo_class_get(obj))
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type cls
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void *cls_ret
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if obj == NULL:
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return None
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data = eo_do(obj, eo_key_data_get("python-eo"))
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if data != NULL:
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EINA_LOG_DOM_DBG(PY_EFL_EO_LOG_DOMAIN,
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"Returning a Python object instance for Eo of type %s.", cls_name)
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return <Eo>data
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if cls_name == NULL:
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raise ValueError(
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"Eo object at %#x does not have a type!" % <uintptr_t>obj)
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cls_ret = eina_hash_find(object_mapping, cls_name)
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if cls_ret == NULL:
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# TODO: Add here a last ditch effort to import the class from a module
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raise ValueError(
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"Eo object at %#x of type %s does not have a mapping!" % (
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<uintptr_t>obj, cls_name)
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)
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cls = <type>cls_ret
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if cls is None:
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raise ValueError(
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"Mapping for Eo object at %#x, type %s, contains None!" % (
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<uintptr_t>obj, cls_name))
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EINA_LOG_DOM_DBG(PY_EFL_EO_LOG_DOMAIN,
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"Constructing a Python object from Eo of type %s.", cls_name)
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o = cls.__new__(cls)
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o._set_obj(obj)
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return o
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cdef api cEo *instance_from_object(object obj):
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cdef Eo o = obj
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return o.obj
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cdef void _register_decorated_callbacks(Eo obj):
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"""
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Search every attrib of the pyobj for a __decorated_callbacks__ object,
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a list actually. If found then exec the functions listed there, with their
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arguments. Must be called just after the _set_obj call.
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List items signature: ("function_name", *args)
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"""
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cdef object attr_name, attrib, func_name, func
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cdef type cls = type(obj)
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# XXX: This whole thing is really slow. Can we do it better?
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for attr_name, attrib in cls.__dict__.items():
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if "__decorated_callbacks__" in dir(attrib):
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for (func_name, *args) in getattr(attrib, "__decorated_callbacks__"):
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func = getattr(obj, func_name)
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func(*args)
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######################################################################
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EO_CALLBACK_STOP = enums.EO_CALLBACK_STOP
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EO_CALLBACK_CONTINUE = enums.EO_CALLBACK_CONTINUE
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######################################################################
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cdef Eina_Bool _eo_event_del_cb(void *data, cEo *obj,
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const Eo_Event_Description *desc,
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void *event_info) with gil:
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cdef:
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Eo self = <Eo>data
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const char *cls_name = eo_class_name_get(eo_class_get(obj))
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EINA_LOG_DOM_DBG(PY_EFL_EO_LOG_DOMAIN, "Deleting Eo: %s", cls_name)
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eo_do(self.obj,
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eo_event_callback_del(EO_EV_DEL, _eo_event_del_cb, <const void *>self))
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eo_do(self.obj, eo_key_data_del("python-eo"))
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self.obj = NULL
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Py_DECREF(self)
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return enums.EO_CALLBACK_STOP
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cdef Eina_Bool _py_efl_eo_event_cb(
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void *data, cEo *obj, const Eo_Event_Description *desc, void *event_info):
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cdef:
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void* tmp
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bint ret
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Eo o
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func = <object>data
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o = object_from_instance(obj)
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# create event description python object
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tmp = eina_hash_find(o.event_conv_mapping, desc)
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if tmp == NULL:
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py_ev_info_obj = None
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else:
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py_ev_info_cls = <object>tmp
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# use a generic class and set some conv func??
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#py_ev_info_obj = py_ev_info_cls.__new__(py_ev_info_cls)
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#ret = func(py_ev_desc, py_ev_info_obj) # o as first param?
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#return ret
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cdef class Eo(object):
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"""
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Base class used by all the object in the EFL.
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"""
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# c globals declared in eo.pxd (to make the class available to others)
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def __cinit__(self):
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self.event_desc_mapping = eina_hash_string_superfast_new(NULL)
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self.event_conv_mapping = eina_hash_pointer_new(NULL)
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self.data = dict()
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def __init__(self, *args, **kwargs):
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if type(self) is Eo:
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raise TypeError("Must not instantiate Eo, but subclasses")
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def __repr__(self):
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cdef cEo *parent = NULL
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if self.obj != NULL:
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parent = <cEo *>eo_do(self.obj, eo_parent_get())
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return ("<%s object (Eo) at %#x (obj=%#x, parent=%#x, refcount=%d)>") % (
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type(self).__name__,
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<uintptr_t><void *>self,
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<uintptr_t>self.obj,
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<uintptr_t>parent,
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PY_REFCOUNT(self))
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def __nonzero__(self):
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return 1 if self.obj != NULL else 0
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cdef int _set_obj(self, cEo *obj) except 0:
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assert self.obj == NULL, "Object must be clean"
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assert obj != NULL, "Cannot set a NULL object"
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self.obj = obj
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eo_do(self.obj, eo_key_data_set("python-eo", <void *>self, NULL))
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eo_do(self.obj,
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eo_event_callback_add(EO_EV_DEL, _eo_event_del_cb, <const void *>self))
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Py_INCREF(self)
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return 1
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cdef int _set_properties_from_keyword_args(self, dict kwargs) except 0:
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if not kwargs:
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return 1
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cdef list cls_list = dir(self)
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for k, v in kwargs.items():
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assert k in cls_list, "%s has no attribute with the name %s." % (self, k)
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setattr(self, k, v)
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return 1
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def delete(self):
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"""Delete the object and free internal resources.
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.. note:: This will not delete the python object, but only the internal
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C one. The python object will be automatically deleted by the
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garbage collector when there are no more reference to it.
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"""
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eo_del(self.obj)
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def is_deleted(self):
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"""Check if the object has been deleted thus leaving the object shallow.
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:return: True if the object has been deleted yet, False otherwise.
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:rtype: bool
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"""
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return bool(self.obj == NULL)
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def parent_set(self, Eo parent):
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"""Set the parent object.
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:param parent: The object to set as parent.
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:type parent: :class:`Eo`
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"""
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eo_do(self.obj, eo_parent_set(parent.obj))
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def parent_get(self):
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"""Get the parent object.
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:return: The parent object
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:rtype: :class:`Eo`
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"""
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cdef cEo *parent = <cEo *>eo_do(self.obj, eo_parent_get())
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return object_from_instance(parent)
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def event_freeze(self):
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"""Pause event propagation for this object."""
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eo_do(self.obj, eo_event_freeze())
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def event_thaw(self):
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"""Restart event propagation for this object."""
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eo_do(self.obj, eo_event_thaw())
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def event_freeze_count_get(self):
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"""Get the event freeze count for this object.
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:return: the freeze count
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:rtype: int
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"""
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cdef int fcount = <int>eo_do(self.obj, eo_event_freeze_count_get())
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return fcount
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def event_callback_add(self, event_name, func):
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cdef:
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void *desc
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const char *ev_name
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if isinstance(event_name, unicode):
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event_name = PyUnicode_AsUTF8String(event_name)
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ev_name = event_name
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desc = eina_hash_find(self.event_desc_mapping, ev_name)
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if desc is NULL:
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raise RuntimeError("Unknown Eo event name: %s" % (event_name))
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eo_event_callback_add(
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<Eo_Event_Description *>desc,
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_py_efl_eo_event_cb,
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<const void *>func
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)
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Py_INCREF(func)
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def event_callback_del(self, event_name, func):
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cdef:
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void *desc
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const char *ev_name
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if isinstance(event_name, unicode):
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event_name = PyUnicode_AsUTF8String(event_name)
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ev_name = event_name
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desc = eina_hash_find(self.event_desc_mapping, ev_name)
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if desc is NULL:
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raise RuntimeError("Unknown Eo event name: %s" % (event_name))
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eo_event_callback_del(
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<Eo_Event_Description *>desc,
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_py_efl_eo_event_cb,
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<const void *>func
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)
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Py_DECREF(func)
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