зеркало из https://github.com/mozilla/pjs.git
241 строка
9.4 KiB
Python
241 строка
9.4 KiB
Python
# ***** BEGIN LICENSE BLOCK *****
|
|
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
#
|
|
# The contents of this file are subject to the Mozilla Public License Version
|
|
# 1.1 (the "License"); you may not use this file except in compliance with
|
|
# the License. You may obtain a copy of the License at
|
|
# http://www.mozilla.org/MPL/
|
|
#
|
|
# Software distributed under the License is distributed on an "AS IS" basis,
|
|
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
# for the specific language governing rights and limitations under the
|
|
# License.
|
|
#
|
|
# The Original Code is the Python XPCOM language bindings.
|
|
#
|
|
# The Initial Developer of the Original Code is
|
|
# ActiveState Tool Corp.
|
|
# Portions created by the Initial Developer are Copyright (C) 2000, 2001
|
|
# the Initial Developer. All Rights Reserved.
|
|
#
|
|
# Contributor(s):
|
|
# Mark Hammond <MarkH@ActiveState.com> (original author)
|
|
#
|
|
# Alternatively, the contents of this file may be used under the terms of
|
|
# either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
# in which case the provisions of the GPL or the LGPL are applicable instead
|
|
# of those above. If you wish to allow use of your version of this file only
|
|
# under the terms of either the GPL or the LGPL, and not to allow others to
|
|
# use your version of this file under the terms of the MPL, indicate your
|
|
# decision by deleting the provisions above and replace them with the notice
|
|
# and other provisions required by the GPL or the LGPL. If you do not delete
|
|
# the provisions above, a recipient may use your version of this file under
|
|
# the terms of any one of the MPL, the GPL or the LGPL.
|
|
#
|
|
# ***** END LICENSE BLOCK *****
|
|
|
|
# This module provides the JavaScript "components" interface
|
|
import xpt
|
|
import xpcom, _xpcom
|
|
import xpcom.client
|
|
import xpcom.server
|
|
import types
|
|
|
|
StringTypes = [types.StringType, types.UnicodeType]
|
|
|
|
def _get_good_iid(iid):
|
|
if iid is None:
|
|
iid = _xpcom.IID_nsISupports
|
|
elif type(iid) in StringTypes and len(iid)>0 and iid[0] != "{":
|
|
iid = getattr(interfaces, iid)
|
|
return iid
|
|
|
|
# The "manager" object.
|
|
manager = xpcom.client.Component(_xpcom.GetComponentManager(), _xpcom.IID_nsIComponentManager)
|
|
|
|
# The component registrar
|
|
registrar = xpcom.client.Component(_xpcom.GetComponentManager(), _xpcom.IID_nsIComponentRegistrar)
|
|
|
|
# The "interfaceInfoManager" object - JS doesnt have this.
|
|
interfaceInfoManager = _xpcom.XPTI_GetInterfaceInfoManager()
|
|
|
|
# The serviceManager - JS doesnt have this either!
|
|
serviceManager = _xpcom.GetServiceManager()
|
|
|
|
# The "Exception" object
|
|
Exception = xpcom.COMException
|
|
|
|
# Base class for our collections.
|
|
# It appears that all objects supports "." and "[]" notation.
|
|
# eg, "interface.nsISupports" or interfaces["nsISupports"]
|
|
class _ComponentCollection:
|
|
# Bases are to over-ride 2 methods.
|
|
# _get_one(self, name) - to return one object by name
|
|
# _build_dict - to return a dictionary which provide access into
|
|
def __init__(self):
|
|
self._dict_data = None
|
|
def keys(self):
|
|
if self._dict_data is None:
|
|
self._dict_data = self._build_dict()
|
|
return self._dict_data.keys()
|
|
def items(self):
|
|
if self._dict_data is None:
|
|
self._dict_data = self._build_dict()
|
|
return self._dict_data.items()
|
|
def values(self):
|
|
if self._dict_data is None:
|
|
self._dict_data = self._build_dict()
|
|
return self._dict_data.values()
|
|
def has_key(self, key):
|
|
if self._dict_data is None:
|
|
self._dict_data = self._build_dict()
|
|
return self._dict_data.has_key(key)
|
|
|
|
def __len__(self):
|
|
if self._dict_data is None:
|
|
self._dict_data = self._build_dict()
|
|
return len(self._dict_data)
|
|
|
|
def __getattr__(self, attr):
|
|
if self._dict_data is not None and self._dict_data.has_key(attr):
|
|
return self._dict_data[attr]
|
|
return self._get_one(attr)
|
|
def __getitem__(self, item):
|
|
if self._dict_data is not None and self._dict_data.has_key(item):
|
|
return self._dict_data[item]
|
|
return self._get_one(item)
|
|
|
|
_constants_by_iid_map = {}
|
|
|
|
class _Interface:
|
|
# An interface object.
|
|
def __init__(self, name, iid):
|
|
# Bypass self.__setattr__ when initializing attributes.
|
|
d = self.__dict__
|
|
d['_iidobj_'] = iid # Allows the C++ framework to treat this as a native IID.
|
|
d['name'] = name
|
|
def __cmp__(self, other):
|
|
this_iid = self._iidobj_
|
|
other_iid = getattr(other, "_iidobj_", other)
|
|
return cmp(this_iid, other_iid)
|
|
def __hash__(self):
|
|
return hash(self._iidobj_)
|
|
def __str__(self):
|
|
return str(self._iidobj_)
|
|
def __getitem__(self, item):
|
|
raise TypeError, "components.interface objects are not subscriptable"
|
|
def __setitem__(self, item, value):
|
|
raise TypeError, "components.interface objects are not subscriptable"
|
|
def __setattr__(self, attr, value):
|
|
raise AttributeError, "Can not set attributes on components.Interface objects"
|
|
def __getattr__(self, attr):
|
|
# Support constants as attributes.
|
|
c = _constants_by_iid_map.get(self._iidobj_)
|
|
if c is None:
|
|
c = {}
|
|
i = xpt.Interface(self._iidobj_)
|
|
for c_ob in i.constants:
|
|
c[c_ob.name] = c_ob.value
|
|
_constants_by_iid_map[self._iidobj_] = c
|
|
if c.has_key(attr):
|
|
return c[attr]
|
|
raise AttributeError, "'%s' interfaces do not define a constant '%s'" % (self.name, attr)
|
|
|
|
|
|
class _Interfaces(_ComponentCollection):
|
|
def _get_one(self, name):
|
|
try:
|
|
item = interfaceInfoManager.GetInfoForName(name)
|
|
except xpcom.COMException, why:
|
|
# Present a better exception message, and give a more useful error code.
|
|
import nsError
|
|
raise xpcom.COMException(nsError.NS_ERROR_NO_INTERFACE, "The interface '%s' does not exist" % (name,))
|
|
return _Interface(item.GetName(), item.GetIID())
|
|
|
|
def _build_dict(self):
|
|
ret = {}
|
|
enum = interfaceInfoManager.EnumerateInterfaces()
|
|
while not enum.IsDone():
|
|
# Call the Python-specific FetchBlock, to keep the loop in C.
|
|
items = enum.FetchBlock(500, _xpcom.IID_nsIInterfaceInfo)
|
|
# This shouldnt be necessary, but appears to be so!
|
|
for item in items:
|
|
ret[item.GetName()] = _Interface(item.GetName(), item.GetIID())
|
|
return ret
|
|
|
|
# And the actual object people use.
|
|
interfaces = _Interfaces()
|
|
|
|
del _Interfaces # Keep our namespace clean.
|
|
|
|
#################################################
|
|
class _Class:
|
|
def __init__(self, contractid):
|
|
self.contractid = contractid
|
|
def __getattr__(self, attr):
|
|
if attr == "clsid":
|
|
rc = registrar.contractIDToCID(self.contractid)
|
|
# stash it away - it can never change!
|
|
self.clsid = rc
|
|
return rc
|
|
raise AttributeError, "%s class has no attribute '%s'" % (self.contractid, attr)
|
|
def createInstance(self, iid = None):
|
|
import xpcom.client
|
|
try:
|
|
return xpcom.client.Component(self.contractid, _get_good_iid(iid))
|
|
except xpcom.COMException, details:
|
|
import nsError
|
|
# Handle "no such component" in a cleaner way for the user.
|
|
if details.errno == nsError.NS_ERROR_FACTORY_NOT_REGISTERED:
|
|
raise xpcom.COMException(details.errno, "No such component '%s'" % (self.contractid,))
|
|
raise # Any other exception reraise.
|
|
def getService(self, iid = None):
|
|
return serviceManager.getServiceByContractID(self.contractid, _get_good_iid(iid))
|
|
|
|
class _Classes(_ComponentCollection):
|
|
def __init__(self):
|
|
_ComponentCollection.__init__(self)
|
|
def _get_one(self, name):
|
|
# XXX - Need to check the contractid is valid!
|
|
return _Class(name)
|
|
|
|
def _build_dict(self):
|
|
ret = {}
|
|
enum = registrar.enumerateContractIDs()
|
|
while enum.hasMoreElements():
|
|
# Call the Python-specific FetchBlock, to keep the loop in C.
|
|
items = enum.fetchBlock(2000, _xpcom.IID_nsISupportsCString)
|
|
for item in items:
|
|
name = str(item.data)
|
|
ret[name] = _Class(name)
|
|
return ret
|
|
|
|
classes = _Classes()
|
|
|
|
del _Classes
|
|
|
|
del _ComponentCollection
|
|
|
|
# The ID function
|
|
ID = _xpcom.IID
|
|
|
|
# A helper to cleanup our namespace as xpcom shuts down.
|
|
class _ShutdownObserver:
|
|
_com_interfaces_ = interfaces.nsIObserver
|
|
def observe(self, service, topic, extra):
|
|
global manager, registrar, classes, interfaces, interfaceInfoManager, _shutdownObserver, serviceManager, _constants_by_iid_map
|
|
manager = registrar = classes = interfaces = interfaceInfoManager = _shutdownObserver = serviceManager = _constants_by_iid_map = None
|
|
xpcom.client._shutdown()
|
|
xpcom.server._shutdown()
|
|
|
|
svc = _xpcom.GetServiceManager().getServiceByContractID("@mozilla.org/observer-service;1", interfaces.nsIObserverService)
|
|
# Observers will be QI'd for a weak-reference, so we must keep the
|
|
# observer alive ourself, and must keep the COM object alive,
|
|
# _not_ just the Python instance!!!
|
|
_shutdownObserver = xpcom.server.WrapObject(_ShutdownObserver(), interfaces.nsIObserver)
|
|
# Say we want a weak ref due to an assertion failing. If this is fixed, we can pass 0,
|
|
# and remove the lifetime hacks above! See http://bugzilla.mozilla.org/show_bug.cgi?id=99163
|
|
svc.addObserver(_shutdownObserver, "xpcom-shutdown", 1)
|
|
del svc, _ShutdownObserver
|