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AutoComplete.py
"""AutoComplete.py - An IDLE extension for automatically completing names. This extension can complete either attribute names or file names. It can pop a window with all available names, for the user to select from. """ import os import sys import string from idlelib.configHandler import idleConf # This string includes all chars that may be in a file name (without a path # separator) FILENAME_CHARS = string.ascii_letters + string.digits + os.curdir + "._~#$:-" # This string includes all chars that may be in an identifier ID_CHARS = string.ascii_letters + string.digits + "_" # These constants represent the two different types of completions COMPLETE_ATTRIBUTES, COMPLETE_FILES = range(1, 2+1) from idlelib import AutoCompleteWindow from idlelib.HyperParser import HyperParser import __main__ SEPS = os.sep if os.altsep: # e.g. '/' on Windows... SEPS += os.altsep class AutoComplete: menudefs = [ ('edit', [ ("Show Completions", "<<force-open-completions>>"), ]) ] popupwait = idleConf.GetOption("extensions", "AutoComplete", "popupwait", type="int", default=0) def __init__(self, editwin=None): self.editwin = editwin if editwin is None: # subprocess and test return self.text = editwin.text self.autocompletewindow = None # id of delayed call, and the index of the text insert when the delayed # call was issued. If _delayed_completion_id is None, there is no # delayed call. self._delayed_completion_id = None self._delayed_completion_index = None def _make_autocomplete_window(self): return AutoCompleteWindow.AutoCompleteWindow(self.text) def _remove_autocomplete_window(self, event=None): if self.autocompletewindow: self.autocompletewindow.hide_window() self.autocompletewindow = None def force_open_completions_event(self, event): """Happens when the user really wants to open a completion list, even if a function call is needed. """ self.open_completions(True, False, True) def try_open_completions_event(self, event): """Happens when it would be nice to open a completion list, but not really necessary, for example after a dot, so function calls won't be made. """ lastchar = self.text.get("insert-1c") if lastchar == ".": self._open_completions_later(False, False, False, COMPLETE_ATTRIBUTES) elif lastchar in SEPS: self._open_completions_later(False, False, False, COMPLETE_FILES) def autocomplete_event(self, event): """Happens when the user wants to complete his word, and if necessary, open a completion list after that (if there is more than one completion) """ if hasattr(event, "mc_state") and event.mc_state: # A modifier was pressed along with the tab, continue as usual. return if self.autocompletewindow and self.autocompletewindow.is_active(): self.autocompletewindow.complete() return "break" else: opened = self.open_completions(False, True, True) if opened: return "break" def _open_completions_later(self, *args): self._delayed_completion_index = self.text.index("insert") if self._delayed_completion_id is not None: self.text.after_cancel(self._delayed_completion_id) self._delayed_completion_id = \ self.text.after(self.popupwait, self._delayed_open_completions, *args) def _delayed_open_completions(self, *args): self._delayed_completion_id = None if self.text.index("insert") != self._delayed_completion_index: return self.open_completions(*args) def open_completions(self, evalfuncs, complete, userWantsWin, mode=None): """Find the completions and create the AutoCompleteWindow. Return True if successful (no syntax error or so found). if complete is True, then if there's nothing to complete and no start of completion, won't open completions and return False. If mode is given, will open a completion list only in this mode. """ # Cancel another delayed call, if it exists. if self._delayed_completion_id is not None: self.text.after_cancel(self._delayed_completion_id) self._delayed_completion_id = None hp = HyperParser(self.editwin, "insert") curline = self.text.get("insert linestart", "insert") i = j = len(curline) if hp.is_in_string() and (not mode or mode==COMPLETE_FILES): self._remove_autocomplete_window() mode = COMPLETE_FILES while i and curline[i-1] in FILENAME_CHARS: i -= 1 comp_start = curline[i:j] j = i while i and curline[i-1] in FILENAME_CHARS + SEPS: i -= 1 comp_what = curline[i:j] elif hp.is_in_code() and (not mode or mode==COMPLETE_ATTRIBUTES): self._remove_autocomplete_window() mode = COMPLETE_ATTRIBUTES while i and curline[i-1] in ID_CHARS: i -= 1 comp_start = curline[i:j] if i and curline[i-1] == '.': hp.set_index("insert-%dc" % (len(curline)-(i-1))) comp_what = hp.get_expression() if not comp_what or \ (not evalfuncs and comp_what.find('(') != -1): return else: comp_what = "" else: return if complete and not comp_what and not comp_start: return comp_lists = self.fetch_completions(comp_what, mode) if not comp_lists[0]: return self.autocompletewindow = self._make_autocomplete_window() return not self.autocompletewindow.show_window( comp_lists, "insert-%dc" % len(comp_start), complete, mode, userWantsWin) def fetch_completions(self, what, mode): """Return a pair of lists of completions for something. The first list is a sublist of the second. Both are sorted. If there is a Python subprocess, get the comp. list there. Otherwise, either fetch_completions() 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_completion_list", (what, mode), {}) else: if mode == COMPLETE_ATTRIBUTES: if what == "": namespace = __main__.__dict__.copy() namespace.update(__main__.__builtins__.__dict__) bigl = eval("dir()", namespace) bigl.sort() if "__all__" in bigl: smalll = sorted(eval("__all__", namespace)) else: smalll = [s for s in bigl if s[:1] != '_'] else: try: entity = self.get_entity(what) bigl = dir(entity) bigl.sort() if "__all__" in bigl: smalll = sorted(entity.__all__) else: smalll = [s for s in bigl if s[:1] != '_'] except: return [], [] elif mode == COMPLETE_FILES: if what == "": what = "." try: expandedpath = os.path.expanduser(what) bigl = os.listdir(expandedpath) bigl.sort() smalll = [s for s in bigl if s[:1] != '.'] except OSError: return [], [] if not smalll: smalll = bigl return smalll, bigl def get_entity(self, name): """Lookup name in a namespace spanning sys.modules and __main.dict__""" namespace = sys.modules.copy() namespace.update(__main__.__dict__) return eval(name, namespace) if __name__ == '__main__': from unittest import main main('idlelib.idle_test.test_autocomplete', verbosity=2)
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