summaryrefslogtreecommitdiffstats
path: root/Lib/idlelib/AutoComplete.py
blob: 9d9a81e45ca80b9a2e7e3c941f115885abedcede (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
"""AutoComplete.py - An IDLE extension for automatically completing names.

This extension can complete either attribute names of 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 neccesary, for example after an 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 neccesary,
        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()
        self.autocompletewindow.show_window(comp_lists,
                                            "insert-%dc" % len(comp_start),
                                            complete,
                                            mode,
                                            userWantsWin)
        return True

    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 = eval("__all__", namespace)
                        smalll.sort()
                    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 = entity.__all__
                            smalll.sort()
                        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)