mirror of
https://github.com/python/cpython.git
synced 2025-10-30 21:21:22 +00:00
216 lines
7.2 KiB
Python
216 lines
7.2 KiB
Python
"""CallTips.py - An IDLE Extension to Jog Your Memory
|
|
|
|
Call Tips are floating windows which display function, class, and method
|
|
parameter and docstring information when you type an opening parenthesis, and
|
|
which disappear when you type a closing parenthesis.
|
|
|
|
Future plans include extending the functionality to include class attributes.
|
|
|
|
"""
|
|
import sys
|
|
import string
|
|
import types
|
|
|
|
import CallTipWindow
|
|
|
|
import __main__
|
|
|
|
class CallTips:
|
|
|
|
menudefs = [
|
|
]
|
|
|
|
def __init__(self, editwin=None):
|
|
if editwin is None: # subprocess and test
|
|
self.editwin = None
|
|
return
|
|
self.editwin = editwin
|
|
self.text = editwin.text
|
|
self.calltip = None
|
|
self._make_calltip_window = self._make_tk_calltip_window
|
|
|
|
def close(self):
|
|
self._make_calltip_window = None
|
|
|
|
def _make_tk_calltip_window(self):
|
|
# See __init__ for usage
|
|
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()
|
|
name = self.get_name_at_cursor()
|
|
arg_text = self.fetch_tip(name)
|
|
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.
|
|
|
|
__IDCHARS = "._" + string.ascii_letters + string.digits
|
|
|
|
def get_name_at_cursor(self):
|
|
idchars = self.__IDCHARS
|
|
str = self.text.get("insert linestart", "insert")
|
|
i = len(str)
|
|
while i and str[i-1] in idchars:
|
|
i -= 1
|
|
return str[i:]
|
|
|
|
def fetch_tip(self, name):
|
|
"""Return the argument list and docstring of a function or class
|
|
|
|
If there is a Python subprocess, get the calltip there. Otherwise,
|
|
either fetch_tip() is running in the subprocess itself or it was called
|
|
in an IDLE EditorWindow before any script had been run.
|
|
|
|
The subprocess environment is that of the most recently run script. If
|
|
two unrelated modules are being edited some calltips in the current
|
|
module may be inoperative if the module was not the last to run.
|
|
|
|
"""
|
|
try:
|
|
rpcclt = self.editwin.flist.pyshell.interp.rpcclt
|
|
except:
|
|
rpcclt = None
|
|
if rpcclt:
|
|
return rpcclt.remotecall("exec", "get_the_calltip",
|
|
(name,), {})
|
|
else:
|
|
entity = self.get_entity(name)
|
|
return get_arg_text(entity)
|
|
|
|
def get_entity(self, name):
|
|
"Lookup name in a namespace spanning sys.modules and __main.dict__"
|
|
if name:
|
|
namespace = sys.modules.copy()
|
|
namespace.update(__main__.__dict__)
|
|
try:
|
|
return eval(name, namespace)
|
|
except:
|
|
return None
|
|
|
|
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 = ", ".join(items)
|
|
argText = "(%s)" % argText
|
|
except:
|
|
pass
|
|
# See if we can use the docstring
|
|
doc = getattr(ob, "__doc__", "")
|
|
if doc:
|
|
doc = doc.lstrip()
|
|
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):
|
|
ct = CallTips()
|
|
failed=[]
|
|
for t in tests:
|
|
expected = t.__doc__ + "\n" + t.__doc__
|
|
name = t.__name__
|
|
arg_text = ct.fetch_tip(name)
|
|
if arg_text != expected:
|
|
failed.append(t)
|
|
print "%s - expected %s, but got %s" % (t, expected,
|
|
get_arg_text(entity))
|
|
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)
|