262 lines
8.9 KiB
Python
262 lines
8.9 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.
|
|
|
|
"""
|
|
import re
|
|
import sys
|
|
import types
|
|
import inspect
|
|
|
|
from idlelib import CallTipWindow
|
|
from idlelib.HyperParser import HyperParser
|
|
|
|
import __main__
|
|
|
|
class CallTips:
|
|
|
|
menudefs = [
|
|
('edit', [
|
|
("Show call tip", "<<force-open-calltip>>"),
|
|
])
|
|
]
|
|
|
|
def __init__(self, editwin=None):
|
|
if editwin is None: # subprocess and test
|
|
self.editwin = None
|
|
else:
|
|
self.editwin = editwin
|
|
self.text = editwin.text
|
|
self.active_calltip = None
|
|
self._calltip_window = self._make_tk_calltip_window
|
|
|
|
def close(self):
|
|
self._calltip_window = None
|
|
|
|
def _make_tk_calltip_window(self):
|
|
# See __init__ for usage
|
|
return CallTipWindow.CallTip(self.text)
|
|
|
|
def _remove_calltip_window(self, event=None):
|
|
if self.active_calltip:
|
|
self.active_calltip.hidetip()
|
|
self.active_calltip = None
|
|
|
|
def force_open_calltip_event(self, event):
|
|
"The user selected the menu entry or hotkey, open the tip."
|
|
self.open_calltip(True)
|
|
|
|
def try_open_calltip_event(self, event):
|
|
"""Happens when it would be nice to open a CallTip, but not really
|
|
necessary, for example after an opening bracket, so function calls
|
|
won't be made.
|
|
"""
|
|
self.open_calltip(False)
|
|
|
|
def refresh_calltip_event(self, event):
|
|
if self.active_calltip and self.active_calltip.is_active():
|
|
self.open_calltip(False)
|
|
|
|
def open_calltip(self, evalfuncs):
|
|
self._remove_calltip_window()
|
|
|
|
hp = HyperParser(self.editwin, "insert")
|
|
sur_paren = hp.get_surrounding_brackets('(')
|
|
if not sur_paren:
|
|
return
|
|
hp.set_index(sur_paren[0])
|
|
expression = hp.get_expression()
|
|
if not expression:
|
|
return
|
|
if not evalfuncs and (expression.find('(') != -1):
|
|
return
|
|
argspec = self.fetch_tip(expression)
|
|
if not argspec:
|
|
return
|
|
self.active_calltip = self._calltip_window()
|
|
self.active_calltip.showtip(argspec, sur_paren[0], sur_paren[1])
|
|
|
|
def fetch_tip(self, expression):
|
|
"""Return the argument list and docstring of a function or class.
|
|
|
|
If there is a Python subprocess, get the calltip there. Otherwise,
|
|
either this fetch_tip() is running in the subprocess or it was
|
|
called in an IDLE running without the subprocess.
|
|
|
|
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.
|
|
|
|
To find methods, fetch_tip must be fed a fully qualified name.
|
|
|
|
"""
|
|
try:
|
|
rpcclt = self.editwin.flist.pyshell.interp.rpcclt
|
|
except AttributeError:
|
|
rpcclt = None
|
|
if rpcclt:
|
|
return rpcclt.remotecall("exec", "get_the_calltip",
|
|
(expression,), {})
|
|
else:
|
|
return get_argspec(get_entity(expression))
|
|
|
|
def get_entity(expression):
|
|
"""Return the object corresponding to expression evaluated
|
|
in a namespace spanning sys.modules and __main.dict__.
|
|
"""
|
|
if expression:
|
|
namespace = sys.modules.copy()
|
|
namespace.update(__main__.__dict__)
|
|
try:
|
|
return eval(expression, namespace)
|
|
except BaseException:
|
|
# An uncaught exception closes idle, and eval can raise any
|
|
# exception, especially if user classes are involved.
|
|
return None
|
|
|
|
# The following are used in both get_argspec and tests
|
|
_self_pat = re.compile('self\,?\s*')
|
|
_default_callable_argspec = "No docstring, see docs."
|
|
|
|
def get_argspec(ob):
|
|
'''Return a string describing the arguments and return of a callable object.
|
|
|
|
For Python-coded functions and methods, the first line is introspected.
|
|
Delete 'self' parameter for classes (.__init__) and bound methods.
|
|
The last line is the first line of the doc string. For builtins, this typically
|
|
includes the arguments in addition to the return value.
|
|
|
|
'''
|
|
argspec = ""
|
|
if hasattr(ob, '__call__'):
|
|
if isinstance(ob, type):
|
|
fob = getattr(ob, '__init__', None)
|
|
elif isinstance(ob.__call__, types.MethodType):
|
|
fob = ob.__call__
|
|
else:
|
|
fob = ob
|
|
if isinstance(fob, (types.FunctionType, types.MethodType)):
|
|
argspec = inspect.formatargspec(*inspect.getfullargspec(fob))
|
|
if (isinstance(ob, (type, types.MethodType)) or
|
|
isinstance(ob.__call__, types.MethodType)):
|
|
argspec = _self_pat.sub("", argspec)
|
|
|
|
if isinstance(ob.__call__, types.MethodType):
|
|
doc = ob.__call__.__doc__
|
|
else:
|
|
doc = getattr(ob, "__doc__", "")
|
|
if doc:
|
|
doc = doc.lstrip()
|
|
pos = doc.find("\n")
|
|
if pos < 0 or pos > 70:
|
|
pos = 70
|
|
if argspec:
|
|
argspec += "\n"
|
|
argspec += doc[:pos]
|
|
if not argspec:
|
|
argspec = _default_callable_argspec
|
|
return argspec
|
|
|
|
#################################################
|
|
#
|
|
# Test code tests CallTips.fetch_tip, get_entity, and get_argspec
|
|
|
|
def main():
|
|
# Putting expected in docstrings results in doubled tips for test
|
|
def t1(): "()"
|
|
def t2(a, b=None): "(a, b=None)"
|
|
def t3(a, *args): "(a, *args)"
|
|
def t4(*args): "(*args)"
|
|
def t5(a, *args): "(a, *args)"
|
|
def t6(a, b=None, *args, **kw): "(a, b=None, *args, **kw)"
|
|
|
|
class TC(object):
|
|
"(ai=None, *b)"
|
|
def __init__(self, ai=None, *b): "(self, ai=None, *b)"
|
|
def t1(self): "(self)"
|
|
def t2(self, ai, b=None): "(self, ai, b=None)"
|
|
def t3(self, ai, *args): "(self, ai, *args)"
|
|
def t4(self, *args): "(self, *args)"
|
|
def t5(self, ai, *args): "(self, ai, *args)"
|
|
def t6(self, ai, b=None, *args, **kw): "(self, ai, b=None, *args, **kw)"
|
|
@classmethod
|
|
def cm(cls, a): "(cls, a)"
|
|
@staticmethod
|
|
def sm(b): "(b)"
|
|
def __call__(self, ci): "(ci)"
|
|
|
|
tc = TC()
|
|
|
|
# Python classes that inherit builtin methods
|
|
class Int(int): "Int(x[, base]) -> integer"
|
|
class List(list): "List() -> new empty list"
|
|
# Simulate builtin with no docstring for default argspec test
|
|
class SB: __call__ = None
|
|
|
|
__main__.__dict__.update(locals()) # required for get_entity eval()
|
|
|
|
num_tests = num_fail = 0
|
|
tip = CallTips().fetch_tip
|
|
|
|
def test(expression, expected):
|
|
nonlocal num_tests, num_fail
|
|
num_tests += 1
|
|
argspec = tip(expression)
|
|
if argspec != expected:
|
|
num_fail += 1
|
|
fmt = "%s - expected\n%r\n - but got\n%r"
|
|
print(fmt % (expression, expected, argspec))
|
|
|
|
def test_builtins():
|
|
# if first line of a possibly multiline compiled docstring changes,
|
|
# must change corresponding test string
|
|
test('int', "int(x[, base]) -> integer")
|
|
test('Int', Int.__doc__)
|
|
test('types.MethodType', "method(function, instance)")
|
|
test('list', "list() -> new empty list")
|
|
test('List', List.__doc__)
|
|
test('list.__new__',
|
|
'T.__new__(S, ...) -> a new object with type S, a subtype of T')
|
|
test('list.__init__',
|
|
'x.__init__(...) initializes x; see help(type(x)) for signature')
|
|
append_doc = "L.append(object) -> None -- append object to end"
|
|
test('list.append', append_doc)
|
|
test('[].append', append_doc)
|
|
test('List.append', append_doc)
|
|
test('SB()', _default_callable_argspec)
|
|
|
|
def test_funcs():
|
|
for func in (t1, t2, t3, t4, t5, t6, TC,):
|
|
fdoc = func.__doc__
|
|
test(func.__name__, fdoc + "\n" + fdoc)
|
|
for func in (TC.t1, TC.t2, TC.t3, TC.t4, TC.t5, TC.t6, TC.cm, TC.sm):
|
|
fdoc = func.__doc__
|
|
test('TC.'+func.__name__, fdoc + "\n" + fdoc)
|
|
|
|
def test_methods():
|
|
for func in (tc.t1, tc.t2, tc.t3, tc.t4, tc.t5, tc.t6):
|
|
fdoc = func.__doc__
|
|
test('tc.'+func.__name__, _self_pat.sub("", fdoc) + "\n" + fdoc)
|
|
fdoc = tc.__call__.__doc__
|
|
test('tc', fdoc + "\n" + fdoc)
|
|
|
|
def test_non_callables():
|
|
# expression evaluates, but not to a callable
|
|
for expr in ('0', '0.0' 'num_tests', b'num_tests', '[]', '{}'):
|
|
test(expr, '')
|
|
# expression does not evaluate, but raises an exception
|
|
for expr in ('1a', 'xyx', 'num_tests.xyz', '[int][1]', '{0:int}[1]'):
|
|
test(expr, '')
|
|
|
|
test_builtins()
|
|
test_funcs()
|
|
test_non_callables()
|
|
test_methods()
|
|
|
|
print("%d of %d tests failed" % (num_fail, num_tests))
|
|
|
|
if __name__ == '__main__':
|
|
main()
|