python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/idlelib/autocomplete_w.py

@@ -0,0 +1,467 @@
+"""
+An auto-completion window for IDLE, used by the autocomplete extension
+"""
+import platform
+
+from tkinter import *
+from tkinter.ttk import Scrollbar
+
+from idlelib.autocomplete import COMPLETE_FILES, COMPLETE_ATTRIBUTES
+from idlelib.multicall import MC_SHIFT
+
+HIDE_VIRTUAL_EVENT_NAME = "<<autocompletewindow-hide>>"
+HIDE_FOCUS_OUT_SEQUENCE = "<FocusOut>"
+HIDE_SEQUENCES = (HIDE_FOCUS_OUT_SEQUENCE, "<ButtonPress>")
+KEYPRESS_VIRTUAL_EVENT_NAME = "<<autocompletewindow-keypress>>"
+# We need to bind event beyond <Key> so that the function will be called
+# before the default specific IDLE function
+KEYPRESS_SEQUENCES = ("<Key>", "<Key-BackSpace>", "<Key-Return>", "<Key-Tab>",
+                      "<Key-Up>", "<Key-Down>", "<Key-Home>", "<Key-End>",
+                      "<Key-Prior>", "<Key-Next>")
+KEYRELEASE_VIRTUAL_EVENT_NAME = "<<autocompletewindow-keyrelease>>"
+KEYRELEASE_SEQUENCE = "<KeyRelease>"
+LISTUPDATE_SEQUENCE = "<B1-ButtonRelease>"
+WINCONFIG_SEQUENCE = "<Configure>"
+DOUBLECLICK_SEQUENCE = "<B1-Double-ButtonRelease>"
+
+class AutoCompleteWindow:
+
+    def __init__(self, widget):
+        # The widget (Text) on which we place the AutoCompleteWindow
+        self.widget = widget
+        # The widgets we create
+        self.autocompletewindow = self.listbox = self.scrollbar = None
+        # The default foreground and background of a selection. Saved because
+        # they are changed to the regular colors of list items when the
+        # completion start is not a prefix of the selected completion
+        self.origselforeground = self.origselbackground = None
+        # The list of completions
+        self.completions = None
+        # A list with more completions, or None
+        self.morecompletions = None
+        # The completion mode. Either autocomplete.COMPLETE_ATTRIBUTES or
+        # autocomplete.COMPLETE_FILES
+        self.mode = None
+        # The current completion start, on the text box (a string)
+        self.start = None
+        # The index of the start of the completion
+        self.startindex = None
+        # The last typed start, used so that when the selection changes,
+        # the new start will be as close as possible to the last typed one.
+        self.lasttypedstart = None
+        # Do we have an indication that the user wants the completion window
+        # (for example, he clicked the list)
+        self.userwantswindow = None
+        # event ids
+        self.hideid = self.keypressid = self.listupdateid = self.winconfigid \
+        = self.keyreleaseid = self.doubleclickid                         = None
+        # Flag set if last keypress was a tab
+        self.lastkey_was_tab = False
+
+    def _change_start(self, newstart):
+        min_len = min(len(self.start), len(newstart))
+        i = 0
+        while i < min_len and self.start[i] == newstart[i]:
+            i += 1
+        if i < len(self.start):
+            self.widget.delete("%s+%dc" % (self.startindex, i),
+                               "%s+%dc" % (self.startindex, len(self.start)))
+        if i < len(newstart):
+            self.widget.insert("%s+%dc" % (self.startindex, i),
+                               newstart[i:])
+        self.start = newstart
+
+    def _binary_search(self, s):
+        """Find the first index in self.completions where completions[i] is
+        greater or equal to s, or the last index if there is no such
+        one."""
+        i = 0; j = len(self.completions)
+        while j > i:
+            m = (i + j) // 2
+            if self.completions[m] >= s:
+                j = m
+            else:
+                i = m + 1
+        return min(i, len(self.completions)-1)
+
+    def _complete_string(self, s):
+        """Assuming that s is the prefix of a string in self.completions,
+        return the longest string which is a prefix of all the strings which
+        s is a prefix of them. If s is not a prefix of a string, return s."""
+        first = self._binary_search(s)
+        if self.completions[first][:len(s)] != s:
+            # There is not even one completion which s is a prefix of.
+            return s
+        # Find the end of the range of completions where s is a prefix of.
+        i = first + 1
+        j = len(self.completions)
+        while j > i:
+            m = (i + j) // 2
+            if self.completions[m][:len(s)] != s:
+                j = m
+            else:
+                i = m + 1
+        last = i-1
+
+        if first == last: # only one possible completion
+            return self.completions[first]
+
+        # We should return the maximum prefix of first and last
+        first_comp = self.completions[first]
+        last_comp = self.completions[last]
+        min_len = min(len(first_comp), len(last_comp))
+        i = len(s)
+        while i < min_len and first_comp[i] == last_comp[i]:
+            i += 1
+        return first_comp[:i]
+
+    def _selection_changed(self):
+        """Should be called when the selection of the Listbox has changed.
+        Updates the Listbox display and calls _change_start."""
+        cursel = int(self.listbox.curselection()[0])
+
+        self.listbox.see(cursel)
+
+        lts = self.lasttypedstart
+        selstart = self.completions[cursel]
+        if self._binary_search(lts) == cursel:
+            newstart = lts
+        else:
+            min_len = min(len(lts), len(selstart))
+            i = 0
+            while i < min_len and lts[i] == selstart[i]:
+                i += 1
+            newstart = selstart[:i]
+        self._change_start(newstart)
+
+        if self.completions[cursel][:len(self.start)] == self.start:
+            # start is a prefix of the selected completion
+            self.listbox.configure(selectbackground=self.origselbackground,
+                                   selectforeground=self.origselforeground)
+        else:
+            self.listbox.configure(selectbackground=self.listbox.cget("bg"),
+                                   selectforeground=self.listbox.cget("fg"))
+            # If there are more completions, show them, and call me again.
+            if self.morecompletions:
+                self.completions = self.morecompletions
+                self.morecompletions = None
+                self.listbox.delete(0, END)
+                for item in self.completions:
+                    self.listbox.insert(END, item)
+                self.listbox.select_set(self._binary_search(self.start))
+                self._selection_changed()
+
+    def show_window(self, comp_lists, index, complete, mode, userWantsWin):
+        """Show the autocomplete list, bind events.
+        If complete is True, complete the text, and if there is exactly one
+        matching completion, don't open a list."""
+        # Handle the start we already have
+        self.completions, self.morecompletions = comp_lists
+        self.mode = mode
+        self.startindex = self.widget.index(index)
+        self.start = self.widget.get(self.startindex, "insert")
+        if complete:
+            completed = self._complete_string(self.start)
+            start = self.start
+            self._change_start(completed)
+            i = self._binary_search(completed)
+            if self.completions[i] == completed and \
+               (i == len(self.completions)-1 or
+                self.completions[i+1][:len(completed)] != completed):
+                # There is exactly one matching completion
+                return completed == start
+        self.userwantswindow = userWantsWin
+        self.lasttypedstart = self.start
+
+        # Put widgets in place
+        self.autocompletewindow = acw = Toplevel(self.widget)
+        # Put it in a position so that it is not seen.
+        acw.wm_geometry("+10000+10000")
+        # Make it float
+        acw.wm_overrideredirect(1)
+        try:
+            # This command is only needed and available on Tk >= 8.4.0 for OSX
+            # Without it, call tips intrude on the typing process by grabbing
+            # the focus.
+            acw.tk.call("::tk::unsupported::MacWindowStyle", "style", acw._w,
+                        "help", "noActivates")
+        except TclError:
+            pass
+        self.scrollbar = scrollbar = Scrollbar(acw, orient=VERTICAL)
+        self.listbox = listbox = Listbox(acw, yscrollcommand=scrollbar.set,
+                                         exportselection=False, bg="white")
+        for item in self.completions:
+            listbox.insert(END, item)
+        self.origselforeground = listbox.cget("selectforeground")
+        self.origselbackground = listbox.cget("selectbackground")
+        scrollbar.config(command=listbox.yview)
+        scrollbar.pack(side=RIGHT, fill=Y)
+        listbox.pack(side=LEFT, fill=BOTH, expand=True)
+        acw.lift()  # work around bug in Tk 8.5.18+ (issue #24570)
+
+        # Initialize the listbox selection
+        self.listbox.select_set(self._binary_search(self.start))
+        self._selection_changed()
+
+        # bind events
+        self.hideaid = acw.bind(HIDE_VIRTUAL_EVENT_NAME, self.hide_event)
+        self.hidewid = self.widget.bind(HIDE_VIRTUAL_EVENT_NAME, self.hide_event)
+        acw.event_add(HIDE_VIRTUAL_EVENT_NAME, HIDE_FOCUS_OUT_SEQUENCE)
+        for seq in HIDE_SEQUENCES:
+            self.widget.event_add(HIDE_VIRTUAL_EVENT_NAME, seq)
+
+        self.keypressid = self.widget.bind(KEYPRESS_VIRTUAL_EVENT_NAME,
+                                           self.keypress_event)
+        for seq in KEYPRESS_SEQUENCES:
+            self.widget.event_add(KEYPRESS_VIRTUAL_EVENT_NAME, seq)
+        self.keyreleaseid = self.widget.bind(KEYRELEASE_VIRTUAL_EVENT_NAME,
+                                             self.keyrelease_event)
+        self.widget.event_add(KEYRELEASE_VIRTUAL_EVENT_NAME,KEYRELEASE_SEQUENCE)
+        self.listupdateid = listbox.bind(LISTUPDATE_SEQUENCE,
+                                         self.listselect_event)
+        self.winconfigid = acw.bind(WINCONFIG_SEQUENCE, self.winconfig_event)
+        self.doubleclickid = listbox.bind(DOUBLECLICK_SEQUENCE,
+                                          self.doubleclick_event)
+        return None
+
+    def winconfig_event(self, event):
+        if not self.is_active():
+            return
+        # Position the completion list window
+        text = self.widget
+        text.see(self.startindex)
+        x, y, cx, cy = text.bbox(self.startindex)
+        acw = self.autocompletewindow
+        acw_width, acw_height = acw.winfo_width(), acw.winfo_height()
+        text_width, text_height = text.winfo_width(), text.winfo_height()
+        new_x = text.winfo_rootx() + min(x, max(0, text_width - acw_width))
+        new_y = text.winfo_rooty() + y
+        if (text_height - (y + cy) >= acw_height # enough height below
+            or y < acw_height): # not enough height above
+            # place acw below current line
+            new_y += cy
+        else:
+            # place acw above current line
+            new_y -= acw_height
+        acw.wm_geometry("+%d+%d" % (new_x, new_y))
+
+        if platform.system().startswith('Windows'):
+            # See issue 15786. When on Windows platform, Tk will misbehave
+            # to call winconfig_event multiple times, we need to prevent this,
+            # otherwise mouse button double click will not be able to used.
+            acw.unbind(WINCONFIG_SEQUENCE, self.winconfigid)
+            self.winconfigid = None
+
+    def _hide_event_check(self):
+        if not self.autocompletewindow:
+            return
+
+        try:
+            if not self.autocompletewindow.focus_get():
+                self.hide_window()
+        except KeyError:
+            # See issue 734176, when user click on menu, acw.focus_get()
+            # will get KeyError.
+            self.hide_window()
+
+    def hide_event(self, event):
+        # Hide autocomplete list if it exists and does not have focus or
+        # mouse click on widget / text area.
+        if self.is_active():
+            if event.type == EventType.FocusOut:
+                # On Windows platform, it will need to delay the check for
+                # acw.focus_get() when click on acw, otherwise it will return
+                # None and close the window
+                self.widget.after(1, self._hide_event_check)
+            elif event.type == EventType.ButtonPress:
+                # ButtonPress event only bind to self.widget
+                self.hide_window()
+
+    def listselect_event(self, event):
+        if self.is_active():
+            self.userwantswindow = True
+            cursel = int(self.listbox.curselection()[0])
+            self._change_start(self.completions[cursel])
+
+    def doubleclick_event(self, event):
+        # Put the selected completion in the text, and close the list
+        cursel = int(self.listbox.curselection()[0])
+        self._change_start(self.completions[cursel])
+        self.hide_window()
+
+    def keypress_event(self, event):
+        if not self.is_active():
+            return None
+        keysym = event.keysym
+        if hasattr(event, "mc_state"):
+            state = event.mc_state
+        else:
+            state = 0
+        if keysym != "Tab":
+            self.lastkey_was_tab = False
+        if (len(keysym) == 1 or keysym in ("underscore", "BackSpace")
+            or (self.mode == COMPLETE_FILES and keysym in
+                ("period", "minus"))) \
+           and not (state & ~MC_SHIFT):
+            # Normal editing of text
+            if len(keysym) == 1:
+                self._change_start(self.start + keysym)
+            elif keysym == "underscore":
+                self._change_start(self.start + '_')
+            elif keysym == "period":
+                self._change_start(self.start + '.')
+            elif keysym == "minus":
+                self._change_start(self.start + '-')
+            else:
+                # keysym == "BackSpace"
+                if len(self.start) == 0:
+                    self.hide_window()
+                    return None
+                self._change_start(self.start[:-1])
+            self.lasttypedstart = self.start
+            self.listbox.select_clear(0, int(self.listbox.curselection()[0]))
+            self.listbox.select_set(self._binary_search(self.start))
+            self._selection_changed()
+            return "break"
+
+        elif keysym == "Return":
+            self.complete()
+            self.hide_window()
+            return 'break'
+
+        elif (self.mode == COMPLETE_ATTRIBUTES and keysym in
+              ("period", "space", "parenleft", "parenright", "bracketleft",
+               "bracketright")) or \
+             (self.mode == COMPLETE_FILES and keysym in
+              ("slash", "backslash", "quotedbl", "apostrophe")) \
+             and not (state & ~MC_SHIFT):
+            # If start is a prefix of the selection, but is not '' when
+            # completing file names, put the whole
+            # selected completion. Anyway, close the list.
+            cursel = int(self.listbox.curselection()[0])
+            if self.completions[cursel][:len(self.start)] == self.start \
+               and (self.mode == COMPLETE_ATTRIBUTES or self.start):
+                self._change_start(self.completions[cursel])
+            self.hide_window()
+            return None
+
+        elif keysym in ("Home", "End", "Prior", "Next", "Up", "Down") and \
+             not state:
+            # Move the selection in the listbox
+            self.userwantswindow = True
+            cursel = int(self.listbox.curselection()[0])
+            if keysym == "Home":
+                newsel = 0
+            elif keysym == "End":
+                newsel = len(self.completions)-1
+            elif keysym in ("Prior", "Next"):
+                jump = self.listbox.nearest(self.listbox.winfo_height()) - \
+                       self.listbox.nearest(0)
+                if keysym == "Prior":
+                    newsel = max(0, cursel-jump)
+                else:
+                    assert keysym == "Next"
+                    newsel = min(len(self.completions)-1, cursel+jump)
+            elif keysym == "Up":
+                newsel = max(0, cursel-1)
+            else:
+                assert keysym == "Down"
+                newsel = min(len(self.completions)-1, cursel+1)
+            self.listbox.select_clear(cursel)
+            self.listbox.select_set(newsel)
+            self._selection_changed()
+            self._change_start(self.completions[newsel])
+            return "break"
+
+        elif (keysym == "Tab" and not state):
+            if self.lastkey_was_tab:
+                # two tabs in a row; insert current selection and close acw
+                cursel = int(self.listbox.curselection()[0])
+                self._change_start(self.completions[cursel])
+                self.hide_window()
+                return "break"
+            else:
+                # first tab; let AutoComplete handle the completion
+                self.userwantswindow = True
+                self.lastkey_was_tab = True
+                return None
+
+        elif any(s in keysym for s in ("Shift", "Control", "Alt",
+                                       "Meta", "Command", "Option")):
+            # A modifier key, so ignore
+            return None
+
+        elif event.char and event.char >= ' ':
+            # Regular character with a non-length-1 keycode
+            self._change_start(self.start + event.char)
+            self.lasttypedstart = self.start
+            self.listbox.select_clear(0, int(self.listbox.curselection()[0]))
+            self.listbox.select_set(self._binary_search(self.start))
+            self._selection_changed()
+            return "break"
+
+        else:
+            # Unknown event, close the window and let it through.
+            self.hide_window()
+            return None
+
+    def keyrelease_event(self, event):
+        if not self.is_active():
+            return
+        if self.widget.index("insert") != \
+           self.widget.index("%s+%dc" % (self.startindex, len(self.start))):
+            # If we didn't catch an event which moved the insert, close window
+            self.hide_window()
+
+    def is_active(self):
+        return self.autocompletewindow is not None
+
+    def complete(self):
+        self._change_start(self._complete_string(self.start))
+        # The selection doesn't change.
+
+    def hide_window(self):
+        if not self.is_active():
+            return
+
+        # unbind events
+        self.autocompletewindow.event_delete(HIDE_VIRTUAL_EVENT_NAME,
+                                             HIDE_FOCUS_OUT_SEQUENCE)
+        for seq in HIDE_SEQUENCES:
+            self.widget.event_delete(HIDE_VIRTUAL_EVENT_NAME, seq)
+
+        self.autocompletewindow.unbind(HIDE_VIRTUAL_EVENT_NAME, self.hideaid)
+        self.widget.unbind(HIDE_VIRTUAL_EVENT_NAME, self.hidewid)
+        self.hideaid = None
+        self.hidewid = None
+        for seq in KEYPRESS_SEQUENCES:
+            self.widget.event_delete(KEYPRESS_VIRTUAL_EVENT_NAME, seq)
+        self.widget.unbind(KEYPRESS_VIRTUAL_EVENT_NAME, self.keypressid)
+        self.keypressid = None
+        self.widget.event_delete(KEYRELEASE_VIRTUAL_EVENT_NAME,
+                                 KEYRELEASE_SEQUENCE)
+        self.widget.unbind(KEYRELEASE_VIRTUAL_EVENT_NAME, self.keyreleaseid)
+        self.keyreleaseid = None
+        self.listbox.unbind(LISTUPDATE_SEQUENCE, self.listupdateid)
+        self.listupdateid = None
+        if self.winconfigid:
+            self.autocompletewindow.unbind(WINCONFIG_SEQUENCE, self.winconfigid)
+            self.winconfigid = None
+
+        # Re-focusOn frame.text (See issue #15786)
+        self.widget.focus_set()
+
+        # destroy widgets
+        self.scrollbar.destroy()
+        self.scrollbar = None
+        self.listbox.destroy()
+        self.listbox = None
+        self.autocompletewindow.destroy()
+        self.autocompletewindow = None
+
+
+if __name__ == '__main__':
+    from unittest import main
+    main('idlelib.idle_test.test_autocomplete_w', verbosity=2, exit=False)
+
+# TODO: autocomplete/w htest here