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comparison engine/extensions/pythonize.py @ 0:4a0efb7baf70

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* Datasets becomes the new trunk and retires after that :-)
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 29 Jun 2008 18:44:17 +0000
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children 9a1529f9625e
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-1:000000000000 0:4a0efb7baf70
1 # coding: utf-8
2
3 """\
4 Pythonize FIFE
5
6 Import this extension to get a more
7 pythonic interface to FIFE.
8
9 Currently it implements the following
10 conveniences:
11
12 * FIFE Exceptions print their message.
13 * Automatic property generation for:
14 * fife.Engine
15 * fife.Instance
16 * fife.Image
17 * fife.Animation
18 * fife.Point
19 * fife.Rect
20
21 """
22
23 import fife, re
24
25 __all__ = ()
26
27 fife.Exception.__str__ = fife.Exception.getMessage
28 def _Color2Str(c):
29 return 'Color(%s)' % ','.join(map(str,(c.r,c.g,c.b,c.a)))
30 fife.Color.__str__ = _Color2Str
31
32 classes = [ fife.Engine, fife.Instance, fife.Point, fife.Rect, fife.Image, fife.Animation,
33 fife.RenderBackend, fife.Event, fife.Command, fife.Container ]
34
35 def createProperties():
36 """ Autocreate properties for getXYZ/setXYZ functions.
37 """
38 try:
39 import inspect
40 getargspec = inspect.getargspec
41 except ImportError:
42 print "Pythonize: inspect not available - properties are generated with dummy argspec."
43 getargspec = lambda func : ([],'args',None,None)
44
45 def isSimpleGetter(func):
46 if not callable(func):
47 return False
48 try:
49 argspec = getargspec(func)
50 return not (argspec[0] or [s for s in argspec[2:] if s])
51 except TypeError, e:
52 #print func, e
53 return False
54
55 def createNames(name):
56 for prefix in ('get', 'is', 'are'):
57 if name.startswith(prefix):
58 new_name = name[len(prefix):]
59 break
60 settername = 'set' + new_name
61 propertyname = new_name[0].lower() + new_name[1:]
62 return settername, propertyname
63
64 getter = re.compile(r"^(get|are|is)[A-Z]")
65 for class_ in classes:
66 methods = [(name,attr) for name,attr in class_.__dict__.items()
67 if isSimpleGetter(attr) ]
68 setmethods = [(name,attr) for name,attr in class_.__dict__.items() if callable(attr)]
69 getters = []
70 for name,method in methods:
71 if getter.match(name):
72 getters.append((name,method))
73 settername, propertyname = createNames(name)
74 setter = dict(setmethods).get(settername,None)
75 #print name, settername, "--->",propertyname,'(',method,',',setter,')'
76 setattr(class_,propertyname,property(method,setter))
77 if not getters: continue
78
79 # We need to override the swig setattr function
80 # to get properties to work.
81 class_._property_names = set([name for name,method in getters])
82 def _setattr_wrapper_(self,*args):
83 if name in class_._property_names:
84 object.__setattr__(self,*args)
85 else:
86 class_.__setattr__(self,*args)
87 class_.__setattr__ = _setattr_wrapper_
88
89 createProperties()