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229 lines
9.1 KiB
229 lines
9.1 KiB
3 years ago
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"""Complete either attribute names or file names.
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Either on demand or after a user-selected delay after a key character,
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pop up a list of candidates.
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"""
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import __main__
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import keyword
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import os
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import string
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import sys
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# Modified keyword list is used in fetch_completions.
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completion_kwds = [s for s in keyword.kwlist
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if s not in {'True', 'False', 'None'}] # In builtins.
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completion_kwds.extend(('match', 'case')) # Context keywords.
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completion_kwds.sort()
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# Two types of completions; defined here for autocomplete_w import below.
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ATTRS, FILES = 0, 1
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from idlelib import autocomplete_w
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from idlelib.config import idleConf
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from idlelib.hyperparser import HyperParser
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# Tuples passed to open_completions.
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# EvalFunc, Complete, WantWin, Mode
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FORCE = True, False, True, None # Control-Space.
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TAB = False, True, True, None # Tab.
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TRY_A = False, False, False, ATTRS # '.' for attributes.
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TRY_F = False, False, False, FILES # '/' in quotes for file name.
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# This string includes all chars that may be in an identifier.
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# TODO Update this here and elsewhere.
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ID_CHARS = string.ascii_letters + string.digits + "_"
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SEPS = f"{os.sep}{os.altsep if os.altsep else ''}"
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TRIGGERS = f".{SEPS}"
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class AutoComplete:
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def __init__(self, editwin=None, tags=None):
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self.editwin = editwin
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if editwin is not None: # not in subprocess or no-gui test
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self.text = editwin.text
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self.tags = tags
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self.autocompletewindow = None
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# id of delayed call, and the index of the text insert when
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# the delayed call was issued. If _delayed_completion_id is
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# None, there is no delayed call.
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self._delayed_completion_id = None
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self._delayed_completion_index = None
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@classmethod
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def reload(cls):
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cls.popupwait = idleConf.GetOption(
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"extensions", "AutoComplete", "popupwait", type="int", default=0)
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def _make_autocomplete_window(self): # Makes mocking easier.
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return autocomplete_w.AutoCompleteWindow(self.text, tags=self.tags)
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def _remove_autocomplete_window(self, event=None):
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if self.autocompletewindow:
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self.autocompletewindow.hide_window()
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self.autocompletewindow = None
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def force_open_completions_event(self, event):
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"(^space) Open completion list, even if a function call is needed."
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self.open_completions(FORCE)
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return "break"
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def autocomplete_event(self, event):
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"(tab) Complete word or open list if multiple options."
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if hasattr(event, "mc_state") and event.mc_state or\
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not self.text.get("insert linestart", "insert").strip():
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# A modifier was pressed along with the tab or
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# there is only previous whitespace on this line, so tab.
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return None
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if self.autocompletewindow and self.autocompletewindow.is_active():
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self.autocompletewindow.complete()
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return "break"
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else:
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opened = self.open_completions(TAB)
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return "break" if opened else None
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def try_open_completions_event(self, event=None):
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"(./) Open completion list after pause with no movement."
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lastchar = self.text.get("insert-1c")
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if lastchar in TRIGGERS:
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args = TRY_A if lastchar == "." else TRY_F
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self._delayed_completion_index = self.text.index("insert")
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if self._delayed_completion_id is not None:
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self.text.after_cancel(self._delayed_completion_id)
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self._delayed_completion_id = self.text.after(
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self.popupwait, self._delayed_open_completions, args)
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def _delayed_open_completions(self, args):
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"Call open_completions if index unchanged."
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self._delayed_completion_id = None
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if self.text.index("insert") == self._delayed_completion_index:
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self.open_completions(args)
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def open_completions(self, args):
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"""Find the completions and create the AutoCompleteWindow.
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Return True if successful (no syntax error or so found).
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If complete is True, then if there's nothing to complete and no
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start of completion, won't open completions and return False.
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If mode is given, will open a completion list only in this mode.
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"""
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evalfuncs, complete, wantwin, mode = args
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# Cancel another delayed call, if it exists.
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if self._delayed_completion_id is not None:
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self.text.after_cancel(self._delayed_completion_id)
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self._delayed_completion_id = None
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hp = HyperParser(self.editwin, "insert")
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curline = self.text.get("insert linestart", "insert")
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i = j = len(curline)
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if hp.is_in_string() and (not mode or mode==FILES):
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# Find the beginning of the string.
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# fetch_completions will look at the file system to determine
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# whether the string value constitutes an actual file name
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# XXX could consider raw strings here and unescape the string
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# value if it's not raw.
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self._remove_autocomplete_window()
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mode = FILES
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# Find last separator or string start
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while i and curline[i-1] not in "'\"" + SEPS:
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i -= 1
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comp_start = curline[i:j]
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j = i
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# Find string start
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while i and curline[i-1] not in "'\"":
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i -= 1
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comp_what = curline[i:j]
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elif hp.is_in_code() and (not mode or mode==ATTRS):
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self._remove_autocomplete_window()
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mode = ATTRS
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while i and (curline[i-1] in ID_CHARS or ord(curline[i-1]) > 127):
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i -= 1
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comp_start = curline[i:j]
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if i and curline[i-1] == '.': # Need object with attributes.
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hp.set_index("insert-%dc" % (len(curline)-(i-1)))
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comp_what = hp.get_expression()
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if (not comp_what or
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(not evalfuncs and comp_what.find('(') != -1)):
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return None
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else:
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comp_what = ""
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else:
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return None
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if complete and not comp_what and not comp_start:
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return None
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comp_lists = self.fetch_completions(comp_what, mode)
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if not comp_lists[0]:
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return None
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self.autocompletewindow = self._make_autocomplete_window()
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return not self.autocompletewindow.show_window(
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comp_lists, "insert-%dc" % len(comp_start),
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complete, mode, wantwin)
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def fetch_completions(self, what, mode):
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"""Return a pair of lists of completions for something. The first list
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is a sublist of the second. Both are sorted.
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If there is a Python subprocess, get the comp. list there. Otherwise,
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either fetch_completions() is running in the subprocess itself or it
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was called in an IDLE EditorWindow before any script had been run.
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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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"""
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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_completion_list",
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(what, mode), {})
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else:
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if mode == ATTRS:
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if what == "": # Main module names.
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namespace = {**__main__.__builtins__.__dict__,
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**__main__.__dict__}
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bigl = eval("dir()", namespace)
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bigl.extend(completion_kwds)
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bigl.sort()
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if "__all__" in bigl:
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smalll = sorted(eval("__all__", namespace))
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else:
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smalll = [s for s in bigl if s[:1] != '_']
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else:
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try:
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entity = self.get_entity(what)
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bigl = dir(entity)
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bigl.sort()
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if "__all__" in bigl:
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smalll = sorted(entity.__all__)
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else:
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smalll = [s for s in bigl if s[:1] != '_']
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except:
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return [], []
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elif mode == FILES:
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if what == "":
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what = "."
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try:
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expandedpath = os.path.expanduser(what)
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bigl = os.listdir(expandedpath)
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bigl.sort()
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smalll = [s for s in bigl if s[:1] != '.']
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except OSError:
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return [], []
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if not smalll:
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smalll = bigl
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return smalll, bigl
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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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return eval(name, {**sys.modules, **__main__.__dict__})
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AutoComplete.reload()
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if __name__ == '__main__':
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from unittest import main
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main('idlelib.idle_test.test_autocomplete', verbosity=2)
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