Webmail improvements. (drap&drop of messages for moving and deleting, empty trash, etc.)

lib/__init__.py

@@ -78,3 +78,14 @@ def getoption(name, default=None):
     except AttributeError:
         res = default
     return res
+
+
+class Singleton(type):
+    def __init__(cls, name, bases, dict):
+        super(Singleton, cls).__init__(name, bases, dict)
+        cls.instance = None
+
+    def __call__(cls, *args, **kwargs):
+        if cls.instance is None:
+            cls.instance = super(Singleton, cls).__call__(*args, **kwargs)
+        return cls.instance

lib/tables.py

@@ -58,10 +58,12 @@ class Table(object):
                         nrow["cols"] += ["."]
                     continue
                 if row.has_key(c.name):
-                    if "class" in row.keys():
-                        cssclass = row["class"]
-                    else:
+                    try:
+                        cssclass = getattr(c, "cssclass")
+                    except AttributeError:
                         cssclass = ""
+                    if "class" in row.keys():
+                        cssclass += (cssclass != "") and ", %s" % row["class"] or row["class"]
                     
                     nrow["cols"] += [{"value" : self.parse(c.name, row[c.name]), 
                                       "class" : cssclass}]