1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
# CallTips.py - An IDLE extension that provides "Call Tips" - ie, a floating window that
# displays parameter information as you open parens.
import string
import sys
import types
class CallTips:
menudefs = [
]
keydefs = {
'<<paren-open>>': ['<Key-parenleft>'],
'<<paren-close>>': ['<Key-parenright>'],
'<<check-calltip-cancel>>': ['<KeyRelease>'],
'<<calltip-cancel>>': ['<ButtonPress>', '<Key-Escape>'],
}
windows_keydefs = {
}
unix_keydefs = {
}
def __init__(self, editwin):
self.editwin = editwin
self.text = editwin.text
self.calltip = None
if hasattr(self.text, "make_calltip_window"):
self._make_calltip_window = self.text.make_calltip_window
else:
self._make_calltip_window = self._make_tk_calltip_window
def close(self):
self._make_calltip_window = None
# Makes a Tk based calltip window. Used by IDLE, but not Pythonwin.
# See __init__ above for how this is used.
def _make_tk_calltip_window(self):
import CallTipWindow
return CallTipWindow.CallTip(self.text)
def _remove_calltip_window(self):
if self.calltip:
self.calltip.hidetip()
self.calltip = None
def paren_open_event(self, event):
self._remove_calltip_window()
arg_text = get_arg_text(self.get_object_at_cursor())
if arg_text:
self.calltip_start = self.text.index("insert")
self.calltip = self._make_calltip_window()
self.calltip.showtip(arg_text)
return "" #so the event is handled normally.
def paren_close_event(self, event):
# Now just hides, but later we should check if other
# paren'd expressions remain open.
self._remove_calltip_window()
return "" #so the event is handled normally.
def check_calltip_cancel_event(self, event):
if self.calltip:
# If we have moved before the start of the calltip,
# or off the calltip line, then cancel the tip.
# (Later need to be smarter about multi-line, etc)
if self.text.compare("insert", "<=", self.calltip_start) or \
self.text.compare("insert", ">", self.calltip_start + " lineend"):
self._remove_calltip_window()
return "" #so the event is handled normally.
def calltip_cancel_event(self, event):
self._remove_calltip_window()
return "" #so the event is handled normally.
def get_object_at_cursor(self,
wordchars="._" + string.ascii_letters + string.digits):
# Usage of ascii_letters is necessary to avoid UnicodeErrors
# if chars contains non-ASCII.
# XXX - This needs to be moved to a better place
# so the "." attribute lookup code can also use it.
text = self.text
chars = text.get("insert linestart", "insert")
i = len(chars)
while i and chars[i-1] in wordchars:
i = i-1
word = chars[i:]
if word:
# How is this for a hack!
import sys, __main__
namespace = sys.modules.copy()
namespace.update(__main__.__dict__)
try:
return eval(word, namespace)
except:
pass
return None # Can't find an object.
def _find_constructor(class_ob):
# Given a class object, return a function object used for the
# constructor (ie, __init__() ) or None if we can't find one.
try:
return class_ob.__init__.im_func
except AttributeError:
for base in class_ob.__bases__:
rc = _find_constructor(base)
if rc is not None: return rc
return None
def get_arg_text(ob):
# Get a string describing the arguments for the given object.
argText = ""
if ob is not None:
argOffset = 0
if type(ob)==types.ClassType:
# Look for the highest __init__ in the class chain.
fob = _find_constructor(ob)
if fob is None:
fob = lambda: None
else:
argOffset = 1
elif type(ob)==types.MethodType:
# bit of a hack for methods - turn it into a function
# but we drop the "self" param.
fob = ob.im_func
argOffset = 1
else:
fob = ob
# Try and build one for Python defined functions
if type(fob) in [types.FunctionType, types.LambdaType]:
try:
realArgs = fob.func_code.co_varnames[argOffset:fob.func_code.co_argcount]
defaults = fob.func_defaults or []
defaults = list(map(lambda name: "=%s" % name, defaults))
defaults = [""] * (len(realArgs)-len(defaults)) + defaults
items = map(lambda arg, dflt: arg+dflt, realArgs, defaults)
if fob.func_code.co_flags & 0x4:
items.append("...")
if fob.func_code.co_flags & 0x8:
items.append("***")
argText = string.join(items , ", ")
argText = "(%s)" % argText
except:
pass
# See if we can use the docstring
doc = getattr(ob, "__doc__", "")
if doc:
while doc[:1] in " \t\n":
doc = doc[1:]
pos = doc.find("\n")
if pos < 0 or pos > 70:
pos = 70
if argText:
argText += "\n"
argText += doc[:pos]
return argText
#################################################
#
# Test code
#
if __name__=='__main__':
def t1(): "()"
def t2(a, b=None): "(a, b=None)"
def t3(a, *args): "(a, ...)"
def t4(*args): "(...)"
def t5(a, *args): "(a, ...)"
def t6(a, b=None, *args, **kw): "(a, b=None, ..., ***)"
class TC:
"(a=None, ...)"
def __init__(self, a=None, *b): "(a=None, ...)"
def t1(self): "()"
def t2(self, a, b=None): "(a, b=None)"
def t3(self, a, *args): "(a, ...)"
def t4(self, *args): "(...)"
def t5(self, a, *args): "(a, ...)"
def t6(self, a, b=None, *args, **kw): "(a, b=None, ..., ***)"
def test( tests ):
failed=[]
for t in tests:
expected = t.__doc__ + "\n" + t.__doc__
if get_arg_text(t) != expected:
failed.append(t)
print "%s - expected %s, but got %s" % (t, `expected`, `get_arg_text(t)`)
print "%d of %d tests failed" % (len(failed), len(tests))
tc = TC()
tests = t1, t2, t3, t4, t5, t6, \
TC, tc.t1, tc.t2, tc.t3, tc.t4, tc.t5, tc.t6
test(tests)
|
