first commit

mumble/iceutil.py

@@ -0,0 +1,37 @@
+import re
+
+
+def ice_method(attr):
+    # Convert event name from CamelCase to underscores.
+    attr = re.sub(r'(.)([A-Z][a-z]+)', r'\1_\2', attr)
+    attr = re.sub(r'([a-z0-9])([A-Z])', r'\1_\2', attr).lower()
+    # Strip out the `current` value which is the final one alwaus.
+    return lambda self, *args: getattr(self.callback, attr)(*args[:-1])
+
+
+def ice_callback(name, bases, attrs):
+    def __init__(self, callback):
+        self.callback = callback
+    attrs['__init__'] = __init__
+
+    # Detect Ice methods and wrap in more pythonic callbacks.
+    for base in bases:
+        for attr in dir(base):
+            if attr.startswith('_op_') and not attr.startswith('_op_ice_'):
+                attr = attr[4:]
+                attrs[attr] = ice_method(attr)
+
+    return type(name, bases, attrs)
+
+
+_ice_class_cache = {}
+
+
+def ice_init(from_, name, *args, **kwargs):
+    try:
+        cls = _ice_class_cache[name]
+    except KeyError:
+        class MurmurClass(getattr(from_, name)):
+            __metaclass__ = ice_callback
+        cls = _ice_class_cache[name] = MurmurClass
+    return cls(*args, **kwargs)