X-Git-Url: http://dolda2000.com/gitweb/?a=blobdiff_plain;f=wrw%2Futil.py;h=727660754ab80317ed777c2d86524840dbb7900d;hb=1f9d8560d3b425e3a3883876da0117e755911dd7;hp=7a29ea8c20571bf0543a17af9f0e57be5554ddeb;hpb=bbdebbab6c98d8611bc8faa197df226d29e4cb2b;p=wrw.git

diff --git a/wrw/util.py b/wrw/util.py
index 7a29ea8..7276607 100644
--- a/wrw/util.py
+++ b/wrw/util.py
@@ -1,3 +1,4 @@
+from __future__ import with_statement
 import inspect
 import req, dispatch, session, form
 
@@ -36,19 +37,21 @@ def persession(data = None):
 
 class sessiondata(object):
     @classmethod
-    def get(cls, req):
+    def get(cls, req, create = True):
         sess = cls.sessdb().get(req)
         with sess.lock:
             try:
                 return sess[cls]
             except KeyError:
-                ret = cls(req)
+                if not create:
+                    return None
+                ret = cls(req, sess)
                 sess[cls] = ret
                 return ret
 
     @classmethod
     def sessdb(cls):
-        return session.default
+        return session.default.val
 
 class autodirty(sessiondata):
     @classmethod
@@ -87,3 +90,92 @@ class manudirty(object):
 
     def dirty(self):
         self.__dirty = True
+
+class specslot(object):
+    __slots__ = ["nm", "idx", "dirty"]
+    unbound = object()
+    
+    def __init__(self, nm, idx, dirty):
+        self.nm = nm
+        self.idx = idx
+        self.dirty = dirty
+
+    @staticmethod
+    def slist(ins):
+        # Avoid calling __getattribute__
+        return specdirty.__sslots__.__get__(ins, type(ins))
+
+    def __get__(self, ins, cls):
+        val = self.slist(ins)[self.idx]
+        if val is specslot.unbound:
+            raise AttributeError("specslot %r is unbound" % self.nm)
+        return val
+
+    def __set__(self, ins, val):
+        self.slist(ins)[self.idx] = val
+        if self.dirty:
+            ins.dirty()
+
+    def __delete__(self, ins):
+        self.slist(ins)[self.idx] = specslot.unbound
+        ins.dirty()
+
+class specclass(type):
+    def __init__(self, name, bases, tdict):
+        super(specclass, self).__init__(name, bases, tdict)
+        sslots = set()
+        dslots = set()
+        for cls in self.__mro__:
+            css = cls.__dict__.get("__saveslots__", ())
+            sslots.update(css)
+            dslots.update(cls.__dict__.get("__dirtyslots__", css))
+        self.__sslots_l__ = list(sslots)
+        self.__sslots_a__ = list(sslots | dslots)
+        for i, slot in enumerate(self.__sslots_a__):
+            setattr(self, slot, specslot(slot, i, slot in dslots))
+
+class specdirty(sessiondata):
+    __metaclass__ = specclass
+    __slots__ = ["session", "__sslots__", "_is_dirty"]
+    
+    def __specinit__(self):
+        pass
+
+    @staticmethod
+    def __new__(cls, req, sess):
+        self = super(specdirty, cls).__new__(cls)
+        self.session = sess
+        self.__sslots__ = [specslot.unbound] * len(cls.__sslots_a__)
+        self.__specinit__()
+        self._is_dirty = False
+        return self
+
+    def __getnewargs__(self):
+        return (None, self.session)
+
+    def dirty(self):
+        self._is_dirty = True
+
+    def sessfrozen(self):
+        self._is_dirty = False
+
+    def sessdirty(self):
+        return self._is_dirty
+
+    def __getstate__(self):
+        ret = {}
+        for nm, val in zip(type(self).__sslots_a__, specslot.slist(self)):
+            if val is specslot.unbound:
+                ret[nm] = False, None
+            else:
+                ret[nm] = True, val
+        return ret
+
+    def __setstate__(self, st):
+        ss = specslot.slist(self)
+        for i, nm in enumerate(type(self).__sslots_a__):
+            bound, val = st.pop(nm, (False, None))
+            if not bound:
+                ss[i] = specslot.unbound
+            else:
+                ss[i] = val