forked from company-mode/company-mode
-
Notifications
You must be signed in to change notification settings - Fork 0
/
company-dabbrev.el
218 lines (189 loc) · 8.71 KB
/
company-dabbrev.el
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
;;; company-dabbrev.el --- dabbrev-like company-mode completion backend -*- lexical-binding: t -*-
;; Copyright (C) 2009-2011, 2013-2018, 2021-2023 Free Software Foundation, Inc.
;; Author: Nikolaj Schumacher
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'company)
(require 'cl-lib)
(defgroup company-dabbrev nil
"dabbrev-like completion backend."
:group 'company)
(defcustom company-dabbrev-other-buffers 'all
"Determines whether `company-dabbrev' should search other buffers.
If `all', search all other buffers, except the ignored ones. If t, search
buffers with the same major mode. See also `company-dabbrev-time-limit'."
:type '(choice (const :tag "Off" nil)
(const :tag "Same major mode" t)
(const :tag "All" all)))
(defcustom company-dabbrev-ignore-buffers "\\`[ *]"
"Regexp matching the names of buffers to ignore.
Or a function that returns non-nil for such buffers."
:type '(choice (regexp :tag "Regexp")
(function :tag "Predicate"))
:package-version '(company . "0.9.0"))
(defcustom company-dabbrev-time-limit .1
"Determines how many seconds `company-dabbrev' should look for matches."
:type '(choice (const :tag "Off" nil)
(number :tag "Seconds")))
(defcustom company-dabbrev-char-regexp "\\sw"
"A regular expression matching the characters `company-dabbrev' looks for."
:type 'regexp)
(defcustom company-dabbrev-ignore-case 'keep-prefix
"Non-nil to ignore case when collecting completion candidates.
When it's `keep-prefix', the text before point will remain unchanged after
candidate is inserted, even some of its characters have different case."
:type '(choice
(const :tag "Don't ignore case" nil)
(const :tag "Ignore case" t)
(const :tag "Keep case before point" keep-prefix)))
(defcustom company-dabbrev-downcase 'case-replace
"Whether to downcase the returned candidates.
The value of nil means keep them as-is.
`case-replace' means use the value of `case-replace'.
Any other value means downcase."
:type '(choice
(const :tag "Keep as-is" nil)
(const :tag "Downcase" t)
(const :tag "Use case-replace" case-replace)))
(defcustom company-dabbrev-minimum-length 4
"The minimum length for the completion candidate to be included.
This variable affects both `company-dabbrev' and `company-dabbrev-code'."
:type 'integer
:package-version '(company . "0.8.3"))
(defcustom company-dabbrev-ignore-invisible nil
"Non-nil to skip invisible text."
:type 'boolean
:package-version '(company . "0.9.0"))
(defmacro company-dabbrev--time-limit-while (test start limit freq &rest body)
(declare (indent 3) (debug t))
`(let ((company-time-limit-while-counter 0))
(catch 'done
(while ,test
,@body
(and ,limit
(= (cl-incf company-time-limit-while-counter) ,freq)
(setq company-time-limit-while-counter 0)
(> (float-time (time-since ,start)) ,limit)
(throw 'done 'company-time-out))))))
(defun company-dabbrev--make-regexp ()
(concat "\\(?:" company-dabbrev-char-regexp "\\)+"))
(defun company-dabbrev--search-buffer (regexp pos symbols start limit
ignore-comments)
(save-excursion
(cl-labels ((maybe-collect-match
()
(let ((match (match-string-no-properties 0)))
(when (and (>= (length match) company-dabbrev-minimum-length)
(not (and company-dabbrev-ignore-invisible
(invisible-p (match-beginning 0)))))
(puthash match t symbols)))))
(goto-char (if pos (1- pos) (point-min)))
;; Search before pos.
(let ((tmp-end (point)))
(company-dabbrev--time-limit-while (and (not (input-pending-p))
(> tmp-end (point-min)))
start limit 1
(ignore-errors
(forward-char -10000))
(forward-line 0)
(save-excursion
;; Before, we used backward search, but it matches non-greedily, and
;; that forced us to use the "beginning/end of word" anchors in
;; `company-dabbrev--make-regexp'. It's also about 2x slower.
(while (and (not (input-pending-p))
(re-search-forward regexp tmp-end t))
(if (and ignore-comments (save-match-data (company-in-string-or-comment)))
(re-search-forward "\\s>\\|\\s!\\|\\s\"" tmp-end t)
(maybe-collect-match))))
(setq tmp-end (point))))
(goto-char (or pos (point-min)))
;; Search after pos.
(company-dabbrev--time-limit-while (and (not (input-pending-p))
(re-search-forward regexp nil t))
start limit 25
(if (and ignore-comments (save-match-data (company-in-string-or-comment)))
(re-search-forward "\\s>\\|\\s!\\|\\s\"" nil t)
(maybe-collect-match)))
symbols)))
(defun company-dabbrev--search (regexp &optional limit other-buffer-modes
ignore-comments)
(let* ((start (current-time))
(symbols (company-dabbrev--search-buffer regexp (point)
(make-hash-table :test 'equal)
start limit
ignore-comments)))
(when other-buffer-modes
(cl-dolist (buffer (delq (current-buffer) (buffer-list)))
(unless (if (stringp company-dabbrev-ignore-buffers)
(string-match-p company-dabbrev-ignore-buffers
(buffer-name buffer))
(funcall company-dabbrev-ignore-buffers buffer))
(with-current-buffer buffer
(when (or (eq other-buffer-modes 'all)
(cl-some #'derived-mode-p other-buffer-modes))
(setq symbols
(company-dabbrev--search-buffer regexp nil symbols start
limit ignore-comments)))))
(and limit
(> (float-time (time-since start)) limit)
(cl-return))))
symbols))
(defun company-dabbrev--prefix ()
;; Not in the middle of a word.
(unless (looking-at-p company-dabbrev-char-regexp)
;; Emacs can't do greedy backward-search.
(company-grab-line (format "\\(?:^\\| \\)[^ ]*?\\(\\(?:%s\\)*\\)"
company-dabbrev-char-regexp)
1)))
(defun company-dabbrev--filter (prefix candidates)
(let* ((completion-ignore-case company-dabbrev-ignore-case)
(filtered (all-completions prefix candidates))
(lp (length prefix))
(downcase (if (eq company-dabbrev-downcase 'case-replace)
case-replace
company-dabbrev-downcase)))
(when downcase
(let ((ptr filtered))
(while ptr
(setcar ptr (downcase (car ptr)))
(setq ptr (cdr ptr)))))
(if (and (eq company-dabbrev-ignore-case 'keep-prefix)
(not (= lp 0)))
(company-substitute-prefix prefix filtered)
filtered)))
(defun company-dabbrev--fetch ()
(company-dabbrev--search (company-dabbrev--make-regexp)
company-dabbrev-time-limit
(pcase company-dabbrev-other-buffers
(`t (list major-mode))
(`all `all))))
;;;###autoload
(defun company-dabbrev (command &optional arg &rest _ignored)
"dabbrev-like `company-mode' completion backend."
(interactive (list 'interactive))
(cl-case command
(interactive (company-begin-backend 'company-dabbrev))
(prefix (company-dabbrev--prefix))
(candidates
(company-dabbrev--filter
arg
(company-cache-fetch 'dabbrev-candidates #'company-dabbrev--fetch
:expire t)))
(kind 'text)
(no-cache t)
(ignore-case (and company-dabbrev-ignore-case t))
(duplicates t)))
(provide 'company-dabbrev)
;;; company-dabbrev.el ends here