Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 949 insertions, 0 deletions

diff --git a/src/libs/xpcom18a4/python/server/.cvsignore b/src/libs/xpcom18a4/python/server/.cvsignore
new file mode 100644
index 00000000..52e4e611
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/.cvsignore
@@ -0,0 +1,2 @@
+*.pyc
+*.pyo
diff --git a/src/libs/xpcom18a4/python/server/__init__.py b/src/libs/xpcom18a4/python/server/__init__.py
new file mode 100755
index 00000000..48b15106
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/__init__.py
@@ -0,0 +1,88 @@
+# ***** 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 *****
+
+# The xpcom.server package.
+
+from xpcom.server.policy import DefaultPolicy
+from xpcom import _xpcom
+
+# We define the concept of a single "tracer" object - similar to the single
+# Python "trace hook" for debugging.  Someone can set
+# xpcom.server.tracer to some class/function, and it will be used in place
+# of the real xpcom object.  Presumably this "trace" object will delegate
+# to the real object, but presumably also taking some other action, such
+# as calling a profiler or debugger.
+# tracer_unwrap is a function used to "unwrap" the tracer object.
+# If is expected that tracer_unwrap will be called with an object
+# previously returned by "tracer()".
+tracer = tracer_unwrap = None
+
+# Wrap an instance in an interface (via a policy)
+def WrapObject(ob, iid, policy = None, bWrapClient = 1):
+    """Called by the framework to attempt to wrap
+    an object in a policy.
+    If iid is None, it will use the first interface the object indicates it supports.
+    """
+    if policy is None:
+        policy = DefaultPolicy
+    if tracer is not None:
+        ob = tracer(ob)
+    return _xpcom.WrapObject(policy( ob, iid ), iid, bWrapClient)
+
+# Unwrap a Python object back into the Python object
+def UnwrapObject(ob):
+    if ob is None:
+        return None
+    ret = _xpcom.UnwrapObject(ob)._obj_
+    if tracer_unwrap is not None:
+        ret = tracer_unwrap(ret)
+    return ret
+
+# Create the main module for the Python loader.
+# This is a once only init process, and the returned object
+# if used to load all other Python components.
+
+# This means that we keep all factories, modules etc implemented in
+# Python!
+def NS_GetModule( serviceManager, nsIFile ):
+    from . import loader
+    iid = _xpcom.IID_nsIModule
+    return WrapObject(loader.MakePythonComponentLoaderModule(serviceManager, nsIFile), iid, bWrapClient = 0)
+
+def _shutdown():
+    from xpcom.server.policy import _shutdown
+    _shutdown()
diff --git a/src/libs/xpcom18a4/python/server/enumerator.py b/src/libs/xpcom18a4/python/server/enumerator.py
new file mode 100755
index 00000000..d3fb89a9
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/enumerator.py
@@ -0,0 +1,58 @@
+# ***** 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 *****
+
+from xpcom import components
+
+# This class is created by Python components when it
+# needs to return an enumerator.
+# For example, a component may implement a function:
+#  nsISimpleEnumerator enumSomething();
+# This could could simply say:
+# return SimpleEnumerator([something1, something2, something3])
+class SimpleEnumerator:
+    _com_interfaces_ = [components.interfaces.nsISimpleEnumerator]
+
+    def __init__(self, data):
+        self._data = data
+        self._index = 0
+
+    def hasMoreElements(self):
+        return self._index < len(self._data)
+    
+    def getNext(self):
+        self._index = self._index + 1
+        return self._data[self._index-1]
diff --git a/src/libs/xpcom18a4/python/server/factory.py b/src/libs/xpcom18a4/python/server/factory.py
new file mode 100755
index 00000000..b65483dd
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/factory.py
@@ -0,0 +1,68 @@
+# ***** 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 *****
+
+# Class factory
+#
+# Hardly worth its own source file!
+import xpcom
+from xpcom import components, nsError, _xpcom, logger
+
+class Factory:
+    _com_interfaces_ = components.interfaces.nsIFactory
+    # This will only ever be constructed via other Python code,
+    # so we can have ctor args.
+    def __init__(self, klass):
+        self.klass = klass
+
+    def createInstance(self, outer, iid):
+        if outer is not None:
+            raise xpcom.ServerException(nsError.NS_ERROR_NO_AGGREGATION)
+
+        logger.debug("Python Factory creating %s", self.klass.__name__)
+        try:
+            return self.klass()
+        except:
+            # An exception here may not be obvious to the user - none
+            # of their code has been called yet.  It can be handy on
+            # failure to tell the user what class failed!
+            logger.error("Creation of class '%r' failed!\nException details follow\n",
+                           self.klass)
+            # The framework itself will also report the error.
+            raise
+
+    def lockServer(self, lock):
+        logger.debug("Python Factory LockServer called '%s'", lock)
diff --git a/src/libs/xpcom18a4/python/server/loader.py b/src/libs/xpcom18a4/python/server/loader.py
new file mode 100755
index 00000000..ebd42b61
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/loader.py
@@ -0,0 +1,227 @@
+# ***** 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, logger
+from . import module
+import glob
+import os
+from xpcom.client import Component
+
+# Until we get interface constants.
+When_Startup = 0
+When_Component = 1
+When_Timer = 2
+
+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 list(py_module.__dict__.items()):
+        try:
+            if (type(object) == type or issubclass(object, object)) and \
+               _has_good_attr(object, "_com_interfaces_") and \
+               _has_good_attr(object, "_reg_clsid_") and \
+               _has_good_attr(object, "_reg_contractid_"):
+                comps.append(object)
+        except TypeError:
+            # The issubclass call raises TypeError when the obj is not a class.
+            pass;
+    return comps
+
+def register_self(klass, compMgr, location, registryLocation, componentType):
+    pcl = PythonComponentLoader
+    from xpcom import _xpcom
+    svc = _xpcom.GetServiceManager().getServiceByContractID("@mozilla.org/categorymanager;1", components.interfaces.nsICategoryManager)
+    svc.addCategoryEntry("component-loader", pcl._reg_component_type_, pcl._reg_contractid_, 1, 1)
+
+class PythonComponentLoader:
+    _com_interfaces_ = components.interfaces.nsIComponentLoader
+    _reg_clsid_ = "{63B68B1E-3E62-45f0-98E3-5E0B5797970C}" # Never copy these!
+    _reg_contractid_ = "moz.pyloader.1"
+    _reg_desc_ = "Python component loader"
+    # Optional function which performs additional special registration
+    # Appears that no special unregistration is needed for ComponentLoaders, hence no unregister function.
+    _reg_registrar_ = (register_self,None)
+    # Custom attributes for ComponentLoader registration.
+    _reg_component_type_ = "script/python"
+
+    def __init__(self):
+        self.com_modules = {} # Keyed by module's FQN as obtained from nsIFile.path
+        self.moduleFactory = module.Module
+        self.num_modules_this_register = 0
+
+    def _getCOMModuleForLocation(self, componentFile):
+        fqn = componentFile.path
+        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, "Couldnt 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
+        
+    def getFactory(self, clsid, location, type):
+        # return the factory
+        assert type == self._reg_component_type_, "Being asked to create an object not of my type:%s" % (type,)
+        # FIXME: how to do this without obsolete component manager?
+        cmo = components.manager.queryInterface(components.interfaces.nsIComponentManagerObsolete)	
+        file_interface = cmo.specForRegistryLocation(location)
+        # delegate to the module.
+        m = self._getCOMModuleForLocation(file_interface)
+        return m.getClassObject(components.manager, clsid, components.interfaces.nsIFactory)
+
+    def init(self, comp_mgr, registry):
+        # void
+        self.comp_mgr = comp_mgr
+        logger.debug("Python component loader init() called")
+
+     # Called when a component of the appropriate type is registered,
+     # to give the component loader an opportunity to do things like
+     # annotate the registry and such.
+    def onRegister (self, clsid, type, className, proId, location, replace, persist):
+        logger.debug("Python component loader - onRegister() called")
+
+    def autoRegisterComponents (self, when, directory):
+        directory_path = directory.path
+        self.num_modules_this_register = 0
+        logger.debug("Auto-registering all Python components in '%s'", directory_path)
+
+        # ToDo - work out the right thing here
+        # eg - do we recurse?
+        # - do we support packages?
+        entries = directory.directoryEntries
+        while entries.HasMoreElements():
+            entry = entries.GetNext(components.interfaces.nsIFile)
+            if os.path.splitext(entry.path)[1]==".py":
+                try:
+                    self.autoRegisterComponent(when, entry)
+                # Handle some common user errors
+                except xpcom.COMException as details:
+                    from xpcom import nsError
+                    # If the interface name does not exist, suppress the traceback
+                    if details.errno==nsError.NS_ERROR_NO_INTERFACE:
+                        logger.error("Registration of '%s' failed\n %s",
+                                     entry.leafName, details.message)
+                    else:
+                        logger.exception("Registration of '%s' failed!", entry.leafName)
+                except SyntaxError as details:
+                    # Syntax error in source file - no useful traceback here either.
+                    logger.error("Registration of '%s' failed\n %s",
+                                 entry.leafName, details)
+                except:
+                    # All other exceptions get the full traceback.
+                    logger.exception("Registration of '%s' failed.", entry.leafName)
+
+    def autoRegisterComponent (self, when, componentFile):
+        # bool return
+        
+        # Check if we actually need to do anything
+        modtime = componentFile.lastModifiedTime
+        loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
+        if not loader_mgr.hasFileChanged(componentFile, None, modtime):
+            return 1
+
+        if self.num_modules_this_register == 0:
+            # New components may have just installed new Python
+            # modules into the main python directory (including new .pth files)
+            # So we ask Python to re-process our site directory.
+            # Note that the pyloader does the equivalent when loading.
+            try:
+                from xpcom import _xpcom
+                import site
+                NS_XPCOM_CURRENT_PROCESS_DIR="XCurProcD"
+                dirname = _xpcom.GetSpecialDirectory(NS_XPCOM_CURRENT_PROCESS_DIR)
+                dirname.append("python")
+                site.addsitedir(dirname.path)
+            except:
+                logger.exception("PyXPCOM loader failed to process site directory before component registration")
+
+        self.num_modules_this_register += 1
+
+        # auto-register via the module.
+        m = self._getCOMModuleForLocation(componentFile)
+        m.registerSelf(components.manager, componentFile, None, self._reg_component_type_)
+        loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
+        loader_mgr.saveFileInfo(componentFile, None, modtime)
+        return 1
+
+    def autoUnregisterComponent (self, when, componentFile):
+        # bool return
+        # auto-unregister via the module.
+        m = self._getCOMModuleForLocation(componentFile)
+        loader_mgr = components.manager.queryInterface(components.interfaces.nsIComponentLoaderManager)
+        try:
+            m.unregisterSelf(components.manager, componentFile)
+        finally:
+            loader_mgr.removeFileInfo(componentFile, None)
+        return 1
+
+    def registerDeferredComponents (self, when):
+        # bool return
+        logger.debug("Python component loader - registerDeferred() called")
+        return 0 # no more to register
+
+    def unloadAll (self, when):
+        # This is called at shutdown time - don't get too upset if an error
+        # results from logging due to the logfile being closed
+        try:
+            logger.debug("Python component loader being asked to unload all components!")
+        except:
+            # Evil blank except, but restricting to just catching IOError
+            # failure means custom logs could still screw us
+            pass
+        self.comp_mgr = None
+        self.com_modules = {}
+
+def MakePythonComponentLoaderModule(serviceManager, nsIFile):
+    from . import module
+    return module.Module( [PythonComponentLoader] )
diff --git a/src/libs/xpcom18a4/python/server/module.py b/src/libs/xpcom18a4/python/server/module.py
new file mode 100755
index 00000000..73024e95
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/module.py
@@ -0,0 +1,108 @@
+# ***** 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 ActiveState Tool Corp. are Copyright (C) 2000, 2001
+# ActiveState Tool Corp.  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 *****
+
+from xpcom import components
+from xpcom import ServerException, Exception
+from xpcom import nsError
+
+from . import factory
+
+import types
+import os
+
+class Module:
+    _com_interfaces_ = components.interfaces.nsIModule
+    def __init__(self, comps):
+        # Build a map of classes we can provide factories for.
+        c = self.components = {}
+        for klass in comps:
+            c[components.ID(klass._reg_clsid_)] = klass
+        self.klassFactory = factory.Factory
+
+    def getClassObject(self, compMgr, clsid, iid):
+        # Single retval result.
+        try:
+            klass = self.components[clsid]
+        except KeyError:
+            raise ServerException(nsError.NS_ERROR_FACTORY_NOT_REGISTERED)
+        
+        # We can ignore the IID - the auto-wrap process will automatically QI us.
+        return self.klassFactory(klass)
+
+    def registerSelf(self, compMgr, location, loaderStr, componentType):
+        # void function.
+        fname = os.path.basename(location.path)
+        for klass in list(self.components.values()):
+            reg_contractid = klass._reg_contractid_
+            print("Registering '%s' (%s)" % (reg_contractid, fname))
+            reg_desc = getattr(klass, "_reg_desc_", reg_contractid)
+            compMgr = compMgr.queryInterface(components.interfaces.nsIComponentRegistrar)
+            compMgr.registerFactoryLocation(klass._reg_clsid_,
+                                              reg_desc,
+                                              reg_contractid,
+                                              location,
+                                              loaderStr,
+                                              componentType)
+
+            # See if this class nominates custom register_self
+            extra_func = getattr(klass, "_reg_registrar_", (None,None))[0]
+            if extra_func is not None:
+                extra_func(klass, compMgr, location, loaderStr, componentType)
+
+    def unregisterSelf(self, compMgr, location, loaderStr):
+        # void function.
+        for klass in list(self.components.values()):
+            ok = 1
+            try:
+                compMgr.unregisterComponentSpec(klass._reg_clsid_, location)
+            except Exception:
+                ok = 0
+            # Give the class a bash even if we failed!
+            extra_func = getattr(klass, "_reg_registrar_", (None,None))[1]
+            if extra_func is not None:
+                try:
+                    extra_func(klass, compMgr, location, loaderStr)
+                except Exception:
+                    ok = 0
+            if ok:
+                print("Successfully unregistered", klass.__name__)
+            else:
+                print("Unregistration of", klass.__name__, "failed. (probably just not already registered)")
+        
+    def canUnload(self, compMgr):
+        # single bool result
+        return 0 # we can never unload!
+
diff --git a/src/libs/xpcom18a4/python/server/policy.py b/src/libs/xpcom18a4/python/server/policy.py
new file mode 100755
index 00000000..7f84167c
--- /dev/null
+++ b/src/libs/xpcom18a4/python/server/policy.py
@@ -0,0 +1,398 @@
+# ***** 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 Python XPCOM language bindings.
+#
+# The Initial Developer of the Original Code is
+# ActiveState Tool Corp.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#  Mark Hammond <mhammond@skippinet.com.au> (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 *****
+
+from xpcom import xpcom_consts, _xpcom, client, nsError, logger
+from xpcom import ServerException, COMException
+import xpcom
+import xpcom.server
+import operator
+import types
+import logging
+import sys
+
+# Python 3 hacks:
+if sys.version_info[0] >= 3:
+    long = int      # pylint: disable=W0622,C0103
+
+
+IID_nsISupports = _xpcom.IID_nsISupports
+IID_nsIVariant = _xpcom.IID_nsIVariant
+XPT_MD_IS_GETTER = xpcom_consts.XPT_MD_IS_GETTER
+XPT_MD_IS_SETTER = xpcom_consts.XPT_MD_IS_SETTER
+
+VARIANT_INT_TYPES = xpcom_consts.VTYPE_INT8, xpcom_consts.VTYPE_INT16, xpcom_consts.VTYPE_INT32, \
+                    xpcom_consts.VTYPE_UINT8, xpcom_consts.VTYPE_UINT16, xpcom_consts.VTYPE_INT32
+VARIANT_LONG_TYPES = xpcom_consts.VTYPE_INT64, xpcom_consts.VTYPE_UINT64
+VARIANT_FLOAT_TYPES = xpcom_consts.VTYPE_FLOAT, xpcom_consts.VTYPE_DOUBLE
+VARIANT_STRING_TYPES = xpcom_consts.VTYPE_CHAR, xpcom_consts.VTYPE_CHAR_STR, xpcom_consts.VTYPE_STRING_SIZE_IS, \
+                       xpcom_consts.VTYPE_CSTRING
+VARIANT_UNICODE_TYPES = xpcom_consts.VTYPE_WCHAR, xpcom_consts.VTYPE_DOMSTRING, xpcom_consts.VTYPE_WSTRING_SIZE_IS, \
+                        xpcom_consts.VTYPE_ASTRING 
+
+_supports_primitives_map_ = {} # Filled on first use.
+
+_interface_sequence_types_ = tuple, list
+if sys.version_info[0] <= 2:
+    _string_types_ = str, unicode
+else:
+    _string_types_ = bytes, str
+XPTI_GetInterfaceInfoManager = _xpcom.XPTI_GetInterfaceInfoManager
+
+def _GetNominatedInterfaces(obj):
+    ret = getattr(obj, "_com_interfaces_", None)
+    if ret is None: return None
+    # See if the user only gave one.
+    if type(ret) not in _interface_sequence_types_:
+        ret = [ret]
+    real_ret = []
+    # For each interface, walk to the root of the interface tree.
+    iim = XPTI_GetInterfaceInfoManager()
+    for interface in ret:
+        # Allow interface name or IID.
+        interface_info = None
+        if type(interface) in _string_types_:
+            try:
+                interface_info = iim.GetInfoForName(interface)
+            except COMException:
+                pass
+        if interface_info is None:
+            # Allow a real IID
+            interface_info = iim.GetInfoForIID(interface)
+        real_ret.append(interface_info.GetIID())
+        parent = interface_info.GetParent()
+        while parent is not None:
+            parent_iid = parent.GetIID()
+            if parent_iid == IID_nsISupports:
+                break
+            real_ret.append(parent_iid)
+            parent = parent.GetParent()
+    return real_ret
+
+##
+## ClassInfo support
+##
+## We cache class infos by class
+class_info_cache = {}
+
+def GetClassInfoForObject(ob):
+    if xpcom.server.tracer_unwrap is not None:
+        ob = xpcom.server.tracer_unwrap(ob)
+    klass = ob.__class__
+    ci = class_info_cache.get(klass)
+    if ci is None:
+        ci = DefaultClassInfo(klass)
+        ci = xpcom.server.WrapObject(ci, _xpcom.IID_nsIClassInfo, bWrapClient = 0)
+        class_info_cache[klass] = ci
+    return ci
+
+class DefaultClassInfo:
+    _com_interfaces_ = _xpcom.IID_nsIClassInfo
+    def __init__(self, klass):
+        self.klass = klass
+        self.contractID = getattr(klass, "_reg_contractid_", None)
+        self.classDescription = getattr(klass, "_reg_desc_", None)
+        self.classID = getattr(klass, "_reg_clsid_", None)
+        self.implementationLanguage = 3 # Python - avoid lookups just for this
+        self.flags = 0 # what to do here??
+        self.interfaces = None
+
+    def get_classID(self):
+        if self.classID is None:
+            raise ServerException(nsError.NS_ERROR_NOT_IMPLEMENTED, "Class '%r' has no class ID" % (self.klass,))
+        return self.classID
+
+    def getInterfaces(self):
+        if self.interfaces is None:
+            self.interfaces = _GetNominatedInterfaces(self.klass)
+        return self.interfaces
+
+    def getHelperForLanguage(self, language):
+        return None # Not sure what to do here.
+
+class DefaultPolicy:
+    def __init__(self, instance, iid):
+        self._obj_ = instance
+        self._nominated_interfaces_ = ni = _GetNominatedInterfaces(instance)
+        self._iid_ = iid
+        if ni is None:
+            raise ValueError("The object '%r' can not be used as a COM object" % (instance,))
+        # This is really only a check for the user
+        if __debug__:
+            if iid != IID_nsISupports and iid not in ni:
+                # The object may delegate QI.
+                delegate_qi = getattr(instance, "_query_interface_", None)
+                # Perform the actual QI and throw away the result - the _real_
+                # QI performed by the framework will set things right!
+                if delegate_qi is None or not delegate_qi(iid):
+                    raise ServerException(nsError.NS_ERROR_NO_INTERFACE)
+        # Stuff for the magic interface conversion.
+        self._interface_info_ = None
+        self._interface_iid_map_ = {} # Cache - Indexed by (method_index, param_index)
+
+    def _QueryInterface_(self, com_object, iid):
+        # Framework allows us to return a single boolean integer,
+        # or a COM object.
+        if iid in self._nominated_interfaces_:
+            # We return the underlying object re-wrapped
+            # in a new gateway - which is desirable, as one gateway should only support
+            # one interface (this wont affect the users of this policy - we can have as many
+            # gateways as we like pointing to the same Python objects - the users never
+            # see what object the call came in from.
+            # NOTE: We could have simply returned the instance and let the framework
+            # do the auto-wrap for us - but this way we prevent a round-trip back into Python
+            # code just for the autowrap.
+            return xpcom.server.WrapObject(self._obj_, iid, bWrapClient = 0)
+
+        # Always support nsIClassInfo 
+        if iid == _xpcom.IID_nsIClassInfo:
+            return GetClassInfoForObject(self._obj_)
+
+        # See if the instance has a QI
+        # use lower-case "_query_interface_" as win32com does, and it doesnt really matter.
+        delegate = getattr(self._obj_, "_query_interface_", None)
+        if delegate is not None:
+            # The COM object itself doesnt get passed to the child
+            # (again, as win32com doesnt).  It is rarely needed
+            # (in win32com, we dont even pass it to the policy, although we have identified
+            # one place where we should - for marshalling - so I figured I may as well pass it
+            # to the policy layer here, but no all the way down to the object.
+            return delegate(iid)
+        # Finally see if we are being queried for one of the "nsISupports primitives"
+        if not _supports_primitives_map_:
+            iim = _xpcom.XPTI_GetInterfaceInfoManager()
+            for (iid_name, attr, cvt) in _supports_primitives_data_:
+                special_iid = iim.GetInfoForName(iid_name).GetIID()
+                _supports_primitives_map_[special_iid] = (attr, cvt)
+        attr, cvt = _supports_primitives_map_.get(iid, (None,None))
+        if attr is not None and hasattr(self._obj_, attr):
+            return xpcom.server.WrapObject(SupportsPrimitive(iid, self._obj_, attr, cvt), iid, bWrapClient = 0)
+        # Out of clever things to try!
+        return None # We dont support this IID.
+
+    def _MakeInterfaceParam_(self, interface, iid, method_index, mi, param_index):
+        # Wrap a "raw" interface object in a nice object.  The result of this
+        # function will be passed to one of the gateway methods.
+        if iid is None:
+            # look up the interface info - this will be true for all xpcom called interfaces.
+            if self._interface_info_ is None:
+                import xpcom.xpt
+                self._interface_info_ = xpcom.xpt.Interface( self._iid_ )
+            iid = self._interface_iid_map_.get( (method_index, param_index))
+            if iid is None:
+                iid = self._interface_info_.GetIIDForParam(method_index, param_index)
+                self._interface_iid_map_[(method_index, param_index)] = iid
+        # handle nsIVariant
+        if iid == IID_nsIVariant:
+            interface = interface.QueryInterface(iid)
+            dt = interface.dataType
+            if dt in VARIANT_INT_TYPES:
+                return interface.getAsInt32()
+            if dt in VARIANT_LONG_TYPES:
+                return interface.getAsInt64()
+            if dt in VARIANT_FLOAT_TYPES:
+                return interface.getAsFloat()
+            if dt in VARIANT_STRING_TYPES:
+                return interface.getAsStringWithSize()
+            if dt in VARIANT_UNICODE_TYPES:
+                return interface.getAsWStringWithSize()
+            if dt == xpcom_consts.VTYPE_BOOL:
+                return interface.getAsBool()
+            if dt == xpcom_consts.VTYPE_INTERFACE:
+                return interface.getAsISupports()
+            if dt == xpcom_consts.VTYPE_INTERFACE_IS:
+                return interface.getAsInterface()
+            if dt == xpcom_consts.VTYPE_EMPTY or dt == xpcom_consts.VTYPE_VOID:
+                return None
+            if dt == xpcom_consts.VTYPE_ARRAY:
+                return interface.getAsArray()
+            if dt == xpcom_consts.VTYPE_EMPTY_ARRAY:
+                return []
+            if dt == xpcom_consts.VTYPE_ID:
+                return interface.getAsID()
+            # all else fails...
+            logger.warning("Warning: nsIVariant type %d not supported - returning a string", dt)
+            try:
+                return interface.getAsString()
+            except COMException:
+                logger.exception("Error: failed to get Variant as a string - returning variant object")
+                return interface
+            
+        return client.Component(interface, iid)
+    
+    def _CallMethod_(self, com_object, index, info, params):
+        #print "_CallMethod_", index, info, params
+        flags, name, param_descs, ret = info
+        assert ret[1][0] == xpcom_consts.TD_UINT32, "Expected an nsresult (%s)" % (ret,)
+        if XPT_MD_IS_GETTER(flags):
+            # Look for a function of that name
+            func = getattr(self._obj_, "get_" + name, None)
+            if func is None:
+                assert len(param_descs)==1 and len(params)==0, "Can only handle a single [out] arg for a default getter"
+                ret = getattr(self._obj_, name) # Let attribute error go here!
+            else:
+                ret = func(*params)
+            return 0, ret
+        elif XPT_MD_IS_SETTER(flags):
+            # Look for a function of that name
+            func = getattr(self._obj_, "set_" + name, None)
+            if func is None:
+                assert len(param_descs)==1 and len(params)==1, "Can only handle a single [in] arg for a default setter"
+                setattr(self._obj_, name, params[0]) # Let attribute error go here!
+            else:
+                func(*params)
+            return 0
+        else:
+            # A regular method.
+            func = getattr(self._obj_, name)
+            return 0, func(*params)
+
+    def _doHandleException(self, func_name, exc_info):
+        exc_val = exc_info[1]
+        is_server_exception = isinstance(exc_val, ServerException)
+        if is_server_exception:
+            # When a component raised an explicit COM exception, it is
+            # considered 'normal' - however, we still write a debug log
+            # record to help track these otherwise silent exceptions.
+
+            # Note that Python 2.3 does not allow an explicit exc_info tuple
+            # and passing 'True' will not work as there is no exception pending.
+            # Trick things!
+            if logger.isEnabledFor(logging.DEBUG):
+                try:
+                    if sys.version_info[0] <= 2:
+                        exec('raise exc_info[0], exc_info[1], exc_info[2]')
+                    else:
+                        raise exc_info[0](exc_info[1]).with_traceback(exc_info[2])
+                except:
+                    logger.debug("'%s' raised COM Exception %s",
+                             func_name, exc_val, exc_info = 1)
+            return exc_val.errno
+        # Unhandled exception - always print a warning and the traceback.
+        # As above, trick the logging module to handle Python 2.3
+        try:
+            if sys.version_info[0] <= 2:
+                exec('raise exc_info[0], exc_info[1], exc_info[2]')
+            else:
+                raise exc_info[0](exc_info[1]).with_traceback(exc_info[2])
+        except:
+            logger.exception("Unhandled exception calling '%s'", func_name)
+        return nsError.NS_ERROR_FAILURE
+
+    # Called whenever an unhandled Python exception is detected as a result
+    # of _CallMethod_ - this exception may have been raised during the _CallMethod_
+    # invocation, or after its return, but when unpacking the results
+    # eg, type errors, such as a Python integer being used as a string "out" param.
+    def _CallMethodException_(self, com_object, index, info, params, exc_info):
+        # Later we may want to have some smart "am I debugging" flags?
+        # Or maybe just delegate to the actual object - it's probably got the best
+        # idea what to do with them!
+        flags, name, param_descs, ret = info
+        exc_typ, exc_val, exc_tb = exc_info
+        # use the xpt module to get a better repr for the method.
+        # But if we fail, ignore it!
+        try:
+            import xpcom.xpt
+            m = xpcom.xpt.Method(info, index, None)
+            func_repr = m.Describe().lstrip()
+        except COMException:
+            func_repr = "%s(%r)" % (name, param_descs)
+        except:
+            # any other errors are evil!?  Log it
+            self._doHandleException("<building method repr>", sys.exc_info())
+            # And fall through to logging the original error.
+        return self._doHandleException(func_repr, exc_info)
+
+    # Called whenever a gateway fails due to anything other than _CallMethod_.
+    # Really only used for the component loader etc objects, so most
+    # users should never see exceptions triggered here.
+    def _GatewayException_(self, name, exc_info):
+        return self._doHandleException(name, exc_info)
+
+if sys.version_info[0] <= 2:
+    _supports_primitives_data_ = [
+        ("nsISupportsCString", "__str__", str),
+        ("nsISupportsString", "__unicode__", unicode),
+        ("nsISupportsPRUint64", "__long__", long),
+        ("nsISupportsPRInt64", "__long__", long),
+        ("nsISupportsPRUint32", "__int__", int),
+        ("nsISupportsPRInt32", "__int__", int),
+        ("nsISupportsPRUint16", "__int__", int),
+        ("nsISupportsPRInt16", "__int__", int),
+        ("nsISupportsPRUint8", "__int__", int),
+        ("nsISupportsPRBool", "__nonzero__", operator.truth),
+        ("nsISupportsDouble", "__float__", float),
+        ("nsISupportsFloat", "__float__", float),
+    ]
+else:
+    _supports_primitives_data_ = [
+        ("nsISupportsCString", "__str__", str),
+        ("nsISupportsString", "__unicode__", str),
+        ("nsISupportsPRUint64", "__long__", int),
+        ("nsISupportsPRInt64", "__long__", int),
+        ("nsISupportsPRUint32", "__int__", int),
+        ("nsISupportsPRInt32", "__int__", int),
+        ("nsISupportsPRUint16", "__int__", int),
+        ("nsISupportsPRInt16", "__int__", int),
+        ("nsISupportsPRUint8", "__int__", int),
+        ("nsISupportsPRBool", "__nonzero__", operator.truth),
+        ("nsISupportsDouble", "__float__", float),
+        ("nsISupportsFloat", "__float__", float),
+    ]
+
+# Support for the nsISupports primitives:
+class SupportsPrimitive:
+    _com_interfaces_ = ["nsISupports"]
+    def __init__(self, iid, base_ob, attr_name, converter):
+        self.iid = iid
+        self.base_ob = base_ob
+        self.attr_name = attr_name
+        self.converter = converter
+    def _query_interface_(self, iid):
+        if iid == self.iid:
+            return 1
+        return None
+    def get_data(self):
+        method = getattr(self.base_ob, self.attr_name)
+        val = method()
+        return self.converter(val)
+    def set_data(self, val):
+        raise ServerException(nsError.NS_ERROR_NOT_IMPLEMENTED)
+    def toString(self):
+        return str(self.get_data())
+
+def _shutdown():
+    class_info_cache.clear()