implement freezing/thawing hooks

python-slip.spec

@@ -3,7 +3,7 @@
 %{!?python_version: %define python_version %(%{__python} -c "from distutils.sysconfig import get_python_version; print get_python_version()")}
 
 Name:       python-slip
-Version:    0.1.10
+Version:    0.1.11
 Release:    1%{?dist}
 Summary:    Miscellaneous convenience, extension and workaround code for Python
 
@@ -85,6 +85,9 @@ rm -rf %buildroot
 %{python_sitelib}/slip.gtk-%{version}-py%{python_version}.egg-info
 
 %changelog
+* Tue Aug 05 2008 Nils Philippsen <[email protected]> - 0.1.11
+- implement freezing/thawing hooks
+
 * Tue Aug 05 2008 Nils Philippsen <[email protected]> - 0.1.10
 - implement disabling/enabling hooks
 

slip/util/hookable.py

@@ -90,6 +90,32 @@ def _set_hooks_enabled (self, enabled):
 
     hooks_enabled = property (_get_hooks_enabled, _set_hooks_enabled)
 
+    def _get_hooks_frozen (self):
+        if not hasattr (self, "__hooks_frozen__"):
+            self.__hooks_frozen__ = False
+        return self.__hooks_frozen__
+
+    def _set_hooks_frozen (self, freeze):
+        if freeze == self.hooks_frozen:
+            return
+
+        self.__hooks_frozen__ = freeze
+
+        if freeze:
+            self.__hooks_frozen_entries__ = set ()
+        else:
+            for hookentry in self.__hooks_frozen_entries__:
+                hookentry.run ()
+            del self.__hooks_frozen_entries__
+
+    hooks_frozen = property (_get_hooks_frozen, _set_hooks_frozen)
+
+    def freeze_hooks (self):
+        self.hooks_frozen = True
+
+    def thaw_hooks (self):
+        self.hooks_frozen = False
+
     def add_hook (self, hook, *args, **kwargs):
         assert callable (hook)
         hookentry = _HookEntry (hook, args, kwargs)
@@ -100,8 +126,11 @@ def remove_hook (self, hook, *args, **kwargs):
 
     def _run_hooks (self):
         if self.hooks_enabled:
-            for hookentry in self.__hooks__:
-                hookentry.run ()
+            if not self.hooks_frozen:
+                for hookentry in self.__hooks__:
+                    hookentry.run ()
+            else:
+                self.__hooks_frozen_entries__.update (self.__hooks__)
 
 class HookableSet (set, Hookable):
     """A set object which calls registered hooks on changes."""