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226 lines
9.7 KiB
Python
226 lines
9.7 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
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import module
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import glob, os, types
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import traceback
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from xpcom.client import Component
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# Until we get interface constants.
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When_Startup = 0
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When_Component = 1
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When_Timer = 2
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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 = PythonComponentLoader
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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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svc.addCategoryEntry("component-loader", pcl._reg_component_type_, pcl._reg_contractid_, 1, 1)
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class PythonComponentLoader:
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_com_interfaces_ = components.interfaces.nsIComponentLoader
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_reg_clsid_ = "{63B68B1E-3E62-45f0-98E3-5E0B5797970C}" # Never copy these!
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_reg_contractid_ = "moz.pyloader.1"
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_reg_desc_ = "Python component loader"
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# Optional function which performs additional special registration
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# Appears that no special unregistration is needed for ComponentLoaders, hence no unregister function.
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_reg_registrar_ = (register_self,None)
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# Custom attributes for ComponentLoader registration.
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_reg_component_type_ = "script/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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self.num_modules_this_register = 0
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def _getCOMModuleForLocation(self, componentFile):
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fqn = componentFile.path
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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, "Couldnt 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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def getFactory(self, clsid, location, type):
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# return the factory
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assert type == self._reg_component_type_, "Being asked to create an object not of my type:%s" % (type,)
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# FIXME: how to do this without obsolete component manager?
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cmo = components.manager.queryInterface(components.interfaces.nsIComponentManagerObsolete)
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file_interface = cmo.specForRegistryLocation(location)
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# delegate to the module.
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m = self._getCOMModuleForLocation(file_interface)
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return m.getClassObject(components.manager, clsid, components.interfaces.nsIFactory)
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def init(self, comp_mgr, registry):
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# void
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self.comp_mgr = comp_mgr
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if xpcom.verbose:
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print "Python component loader init() called"
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# Called when a component of the appropriate type is registered,
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# to give the component loader an opportunity to do things like
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# annotate the registry and such.
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def onRegister (self, clsid, type, className, proId, location, replace, persist):
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if xpcom.verbose:
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print "Python component loader - onRegister() called"
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def autoRegisterComponents (self, when, directory):
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directory_path = directory.path
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self.num_modules_this_register = 0
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if xpcom.verbose:
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print "Auto-registering all Python components in", directory_path
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# ToDo - work out the right thing here
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# eg - do we recurse?
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# - do we support packages?
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entries = directory.directoryEntries
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while entries.HasMoreElements():
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entry = entries.GetNext(components.interfaces.nsIFile)
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if os.path.splitext(entry.path)[1]==".py":
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try:
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self.autoRegisterComponent(when, entry)
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# Handle some common user errors
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except xpcom.COMException, details:
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from xpcom import nsError
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# If the interface name does not exist, suppress the traceback
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if details.errno==nsError.NS_ERROR_NO_INTERFACE:
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print "** Registration of '%s' failed\n %s" % (entry.leafName,details.message,)
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else:
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print "** Registration of '%s' failed!" % (entry.leafName,)
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traceback.print_exc()
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except SyntaxError, details:
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# Syntax error in source file - no useful traceback here either.
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print "** Registration of '%s' failed!" % (entry.leafName,)
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traceback.print_exception(SyntaxError, details, None)
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except:
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# All other exceptions get the full traceback.
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print "** Registration of '%s' failed!" % (entry.leafName,)
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traceback.print_exc()
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def autoRegisterComponent (self, when, componentFile):
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# bool return
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# Check if we actually need to do anything
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modtime = componentFile.lastModifiedTime
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loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
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if not loader_mgr.hasFileChanged(componentFile, None, modtime):
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return 1
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if self.num_modules_this_register == 0:
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# New components may have just installed new Python
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# modules into the main python directory (including new .pth files)
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# So we ask Python to re-process our site directory.
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# Note that the pyloader does the equivalent when loading.
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try:
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from xpcom import _xpcom
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import site
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NS_XPCOM_CURRENT_PROCESS_DIR="XCurProcD"
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dirname = _xpcom.GetSpecialDirectory(NS_XPCOM_CURRENT_PROCESS_DIR)
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dirname.append("python")
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site.addsitedir(dirname.path)
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except:
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print "PyXPCOM loader failed to process site directory before component registration"
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traceback.print_exc()
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self.num_modules_this_register += 1
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# auto-register via the module.
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m = self._getCOMModuleForLocation(componentFile)
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m.registerSelf(components.manager, componentFile, None, self._reg_component_type_)
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loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
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loader_mgr.saveFileInfo(componentFile, None, modtime)
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return 1
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def autoUnregisterComponent (self, when, componentFile):
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# bool return
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# auto-unregister via the module.
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m = self._getCOMModuleForLocation(componentFile)
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loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
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try:
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m.unregisterSelf(components.manager, componentFile)
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finally:
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loader_mgr.removeFileInfo(componentFile, None)
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return 1
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def registerDeferredComponents (self, when):
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# bool return
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if xpcom.verbose:
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print "Python component loader - registerDeferred() called"
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return 0 # no more to register
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def unloadAll (self, when):
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if xpcom.verbose:
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print "Python component loader being asked to unload all components!"
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self.comp_mgr = None
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self.com_modules = {}
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def MakePythonComponentLoaderModule(serviceManager, nsIFile):
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import module
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return module.Module( [PythonComponentLoader] )
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