204 lines
6.4 KiB
Python
204 lines
6.4 KiB
Python
"""CallTips.py - An IDLE Extension to Jog Your Memory
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Call Tips are floating windows which display function, class, and method
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parameter and docstring information when you type an opening parenthesis, and
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which disappear when you type a closing parenthesis.
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"""
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import re
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import sys
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import types
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import inspect
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from idlelib import CallTipWindow
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from idlelib.HyperParser import HyperParser
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import __main__
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class CallTips:
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menudefs = [
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('edit', [
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("Show call tip", "<<force-open-calltip>>"),
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])
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]
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def __init__(self, editwin=None):
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if editwin is None: # subprocess and test
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self.editwin = None
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else:
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self.editwin = editwin
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self.text = editwin.text
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self.active_calltip = None
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self._calltip_window = self._make_tk_calltip_window
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def close(self):
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self._calltip_window = None
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def _make_tk_calltip_window(self):
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# See __init__ for usage
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return CallTipWindow.CallTip(self.text)
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def _remove_calltip_window(self, event=None):
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if self.active_calltip:
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self.active_calltip.hidetip()
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self.active_calltip = None
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def force_open_calltip_event(self, event):
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"The user selected the menu entry or hotkey, open the tip."
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self.open_calltip(True)
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def try_open_calltip_event(self, event):
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"""Happens when it would be nice to open a CallTip, but not really
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necessary, for example after an opening bracket, so function calls
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won't be made.
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"""
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self.open_calltip(False)
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def refresh_calltip_event(self, event):
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if self.active_calltip and self.active_calltip.is_active():
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self.open_calltip(False)
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def open_calltip(self, evalfuncs):
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self._remove_calltip_window()
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hp = HyperParser(self.editwin, "insert")
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sur_paren = hp.get_surrounding_brackets('(')
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if not sur_paren:
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return
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hp.set_index(sur_paren[0])
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name = hp.get_expression()
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if not name:
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return
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if not evalfuncs and (name.find('(') != -1):
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return
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argspec = self.fetch_tip(name)
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if not argspec:
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return
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self.active_calltip = self._calltip_window()
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self.active_calltip.showtip(argspec, sur_paren[0], sur_paren[1])
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def fetch_tip(self, name):
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"""Return the argument list and docstring of a function or class.
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If there is a Python subprocess, get the calltip there. Otherwise,
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either this fetch_tip() is running in the subprocess or it was
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called in an IDLE running without the subprocess.
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The subprocess environment is that of the most recently run script. If
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two unrelated modules are being edited some calltips in the current
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module may be inoperative if the module was not the last to run.
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To find methods, fetch_tip must be fed a fully qualified name.
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"""
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try:
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rpcclt = self.editwin.flist.pyshell.interp.rpcclt
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except:
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rpcclt = None
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if rpcclt:
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return rpcclt.remotecall("exec", "get_the_calltip",
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(name,), {})
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else:
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entity = self.get_entity(name)
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return get_argspec(entity)
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def get_entity(self, name):
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"Lookup name in a namespace spanning sys.modules and __main.dict__."
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if name:
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namespace = sys.modules.copy()
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namespace.update(__main__.__dict__)
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try:
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return eval(name, namespace)
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except (NameError, AttributeError):
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return None
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def _find_constructor(class_ob):
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"Find the nearest __init__() in the class tree."
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try:
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return class_ob.__init__.__func__
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except AttributeError:
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for base in class_ob.__bases__:
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init = _find_constructor(base)
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if init:
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return init
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return None
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def get_argspec(ob):
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"""Get a string describing the arguments for the given object."""
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argspec = ""
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if ob is not None:
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if isinstance(ob, type):
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fob = _find_constructor(ob)
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if fob is None:
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fob = lambda: None
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elif isinstance(ob, types.MethodType):
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fob = ob.__func__
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else:
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fob = ob
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if isinstance(fob, (types.FunctionType, types.LambdaType)):
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argspec = inspect.formatargspec(*inspect.getfullargspec(fob))
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pat = re.compile('self\,?\s*')
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argspec = pat.sub("", argspec)
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doc = getattr(ob, "__doc__", "")
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if doc:
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doc = doc.lstrip()
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pos = doc.find("\n")
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if pos < 0 or pos > 70:
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pos = 70
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if argspec:
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argspec += "\n"
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argspec += doc[:pos]
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return argspec
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#################################################
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#
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# Test code
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#
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def main():
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def t1(): "()"
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def t2(a, b=None): "(a, b=None)"
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def t3(a, *args): "(a, *args)"
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def t4(*args): "(*args)"
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def t5(a, *args): "(a, *args)"
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def t6(a, b=None, *args, **kw): "(a, b=None, *args, **kw)"
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class TC(object):
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"(ai=None, *b)"
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def __init__(self, ai=None, *b): "(ai=None, *b)"
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def t1(self): "()"
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def t2(self, ai, b=None): "(ai, b=None)"
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def t3(self, ai, *args): "(ai, *args)"
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def t4(self, *args): "(*args)"
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def t5(self, ai, *args): "(ai, *args)"
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def t6(self, ai, b=None, *args, **kw): "(ai, b=None, *args, **kw)"
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__main__.__dict__.update(locals())
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def test(tests):
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ct = CallTips()
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failed=[]
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for t in tests:
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expected = t.__doc__ + "\n" + t.__doc__
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name = t.__name__
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# exercise fetch_tip(), not just get_argspec()
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try:
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qualified_name = "%s.%s" % (t.__self__.__class__.__name__, name)
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except AttributeError:
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qualified_name = name
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argspec = ct.fetch_tip(qualified_name)
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if argspec != expected:
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failed.append(t)
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fmt = "%s - expected %s, but got %s"
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print(fmt % (t.__name__, expected, get_argspec(t)))
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print("%d of %d tests failed" % (len(failed), len(tests)))
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tc = TC()
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tests = (t1, t2, t3, t4, t5, t6,
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TC, tc.t1, tc.t2, tc.t3, tc.t4, tc.t5, tc.t6)
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test(tests)
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if __name__ == '__main__':
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main()
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