home *** CD-ROM | disk | FTP | other *** search
- # ***** 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
- # the Initial Developer. All Rights Reserved.
- #
- # Contributor(s):
- # Mark Hammond <MarkH@ActiveState.com>
- #
- # 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 *****
-
- import xpcom
- from xpcom import components, nsError
- import xpcom.shutdown
-
- import module
-
- import os, types
-
- def _has_good_attr(object, attr):
- # Actually allows "None" to be specified to disable inherited attributes.
- return getattr(object, attr, None) is not None
-
- def FindCOMComponents(py_module):
- # For now, just run over all classes looking for likely candidates.
- comps = []
- for name, object in py_module.__dict__.items():
- if type(object)==types.ClassType and \
- _has_good_attr(object, "_com_interfaces_") and \
- _has_good_attr(object, "_reg_clsid_") and \
- _has_good_attr(object, "_reg_contractid_"):
- comps.append(object)
- return comps
-
- def register_self(klass, compMgr, location, registryLocation, componentType):
- pcl = ModuleLoader
- from xpcom import _xpcom
- svc = _xpcom.GetServiceManager().getServiceByContractID("@mozilla.org/categorymanager;1", components.interfaces.nsICategoryManager)
- # The category 'module-loader' is special - the component manager uses it
- # to create the nsIModuleLoader for a given component type.
- svc.addCategoryEntry("module-loader", pcl._reg_component_type_, pcl._reg_contractid_, 1, 1)
-
- # The Python module loader. Called by the component manager when it finds
- # a component of type self._reg_component_type_. Responsible for returning
- # an nsIModule for the file.
- class ModuleLoader:
- _com_interfaces_ = components.interfaces.nsIModuleLoader
- _reg_clsid_ = "{945BFDA9-0226-485e-8AE3-9A2F68F6116A}" # Never copy these!
- _reg_contractid_ = "@mozilla.org/module-loader/python;1"
- _reg_desc_ = "Python module loader"
- # Optional function which performs additional special registration
- # Appears that no special unregistration is needed for ModuleLoaders, hence no unregister function.
- _reg_registrar_ = (register_self,None)
- # Custom attributes for ModuleLoader registration.
- _reg_component_type_ = "application/x-python"
-
- def __init__(self):
- self.com_modules = {} # Keyed by module's FQN as obtained from nsIFile.path
- self.moduleFactory = module.Module
- xpcom.shutdown.register(self._on_shutdown)
-
- def _on_shutdown(self):
- self.com_modules.clear()
-
- def loadModule(self, aFile):
- return self._getCOMModuleForLocation(aFile)
-
- def _getCOMModuleForLocation(self, componentFile):
- fqn = componentFile.path
- if not fqn.endswith(".py"):
- raise xpcom.ServerException(nsError.NS_ERROR_INVALID_ARG)
- mod = self.com_modules.get(fqn)
- if mod is not None:
- return mod
- import ihooks, sys
- base_name = os.path.splitext(os.path.basename(fqn))[0]
- loader = ihooks.ModuleLoader()
-
- module_name_in_sys = "component:%s" % (base_name,)
- stuff = loader.find_module(base_name, [componentFile.parent.path])
- assert stuff is not None, "Couldn't find the module '%s'" % (base_name,)
- py_mod = loader.load_module( module_name_in_sys, stuff )
-
- # Make and remember the COM module.
- comps = FindCOMComponents(py_mod)
- mod = self.moduleFactory(comps)
-
- self.com_modules[fqn] = mod
- return mod
-