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116 lines
4.8 KiB
Python
116 lines
4.8 KiB
Python
# ***** BEGIN LICENSE BLOCK *****
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is the Python XPCOM language bindings.
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#
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# The Initial Developer of the Original Code is
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# Activestate Tool Corp.
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# Portions created by the Initial Developer are Copyright (C) 2000
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Mark Hammond <MarkH@ActiveState.com>
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ***** END LICENSE BLOCK *****
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import xpcom
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from xpcom import components, nsError
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import xpcom.shutdown
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import module
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import os, types
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def _has_good_attr(object, attr):
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# Actually allows "None" to be specified to disable inherited attributes.
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return getattr(object, attr, None) is not None
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def FindCOMComponents(py_module):
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# For now, just run over all classes looking for likely candidates.
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comps = []
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for name, object in py_module.__dict__.items():
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if type(object)==types.ClassType and \
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_has_good_attr(object, "_com_interfaces_") and \
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_has_good_attr(object, "_reg_clsid_") and \
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_has_good_attr(object, "_reg_contractid_"):
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comps.append(object)
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return comps
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def register_self(klass, compMgr, location, registryLocation, componentType):
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pcl = ModuleLoader
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from xpcom import _xpcom
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svc = _xpcom.GetServiceManager().getServiceByContractID("@mozilla.org/categorymanager;1", components.interfaces.nsICategoryManager)
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# The category 'module-loader' is special - the component manager uses it
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# to create the nsIModuleLoader for a given component type.
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svc.addCategoryEntry("module-loader", pcl._reg_component_type_, pcl._reg_contractid_, 1, 1)
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# The Python module loader. Called by the component manager when it finds
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# a component of type self._reg_component_type_. Responsible for returning
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# an nsIModule for the file.
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class ModuleLoader:
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_com_interfaces_ = components.interfaces.nsIModuleLoader
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_reg_clsid_ = "{945BFDA9-0226-485e-8AE3-9A2F68F6116A}" # Never copy these!
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_reg_contractid_ = "@mozilla.org/module-loader/python;1"
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_reg_desc_ = "Python module loader"
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# Optional function which performs additional special registration
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# Appears that no special unregistration is needed for ModuleLoaders, hence no unregister function.
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_reg_registrar_ = (register_self,None)
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# Custom attributes for ModuleLoader registration.
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_reg_component_type_ = "application/x-python"
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def __init__(self):
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self.com_modules = {} # Keyed by module's FQN as obtained from nsIFile.path
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self.moduleFactory = module.Module
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xpcom.shutdown.register(self._on_shutdown)
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def _on_shutdown(self):
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self.com_modules.clear()
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def loadModule(self, aFile):
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return self._getCOMModuleForLocation(aFile)
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def _getCOMModuleForLocation(self, componentFile):
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fqn = componentFile.path
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if not fqn.endswith(".py"):
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raise xpcom.ServerException(nsError.NS_ERROR_INVALID_ARG)
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mod = self.com_modules.get(fqn)
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if mod is not None:
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return mod
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import ihooks, sys
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base_name = os.path.splitext(os.path.basename(fqn))[0]
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loader = ihooks.ModuleLoader()
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module_name_in_sys = "component:%s" % (base_name,)
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stuff = loader.find_module(base_name, [componentFile.parent.path])
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assert stuff is not None, "Couldn't find the module '%s'" % (base_name,)
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py_mod = loader.load_module( module_name_in_sys, stuff )
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# Make and remember the COM module.
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comps = FindCOMComponents(py_mod)
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mod = self.moduleFactory(comps)
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self.com_modules[fqn] = mod
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return mod
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