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
|
;;; company-flow.el --- Flow backend for company-mode -*- lexical-binding: t -*-
;; Copyright (C) 2016 by Aaron Jensen
;; Author: Aaron Jensen <aaronjensen@gmail.com>
;; URL: https://github.com/aaronjensen/company-flow
;; Package-Version: 20180225.1359
;; Version: 0.1.0
;; Package-Requires: ((company "0.8.0") (dash "2.13.0"))
;;; Commentary:
;; This package adds support for flow to company. It requires
;; flow to be in your path.
;; To use it, add to your company-backends:
;; (eval-after-load 'company
;; '(add-to-list 'company-backends 'company-flow))
;;; License:
;; This file is not part of GNU Emacs.
;; However, it is distributed under the same license.
;; 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, 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
(require 'company)
(require 'dash)
(defgroup company-flow ()
"Flow company backend."
:group 'company
:prefix "company-flow-")
(defcustom company-flow-executable "flow"
"Flow executable to run."
:group 'company-flow
:type 'string)
(make-variable-buffer-local 'company-flow-executable)
(defcustom company-flow-modes '(
js-mode
js-jsx-mode
js2-mode
js2-jsx-mode
rjsx-mode
web-mode
)
"List of major modes where company-flow will be providing completions."
:type '(choice (const :tag "All" nil)
(repeat (symbol :tag "Major mode")))
:group 'company-flow)
(defun company-flow--handle-signal (process _event)
(when (memq (process-status process) '(signal exit))
(let ((callback (process-get process 'company-flow-callback))
(prefix (process-get process 'company-flow-prefix)))
(if (and (eq (process-status process) 'exit)
(eq (process-exit-status process) 0))
(funcall callback (->> process
company-flow--get-output
company-flow--parse-output
;; Remove nils
(--filter it)))
(funcall callback nil)))))
(defun company-flow--make-candidate (line)
"Creates a candidate with a meta property from LINE.
LINE is expected to look like:
registrationSuccess () => {type: 'REGISTRATION_SUCCESS'}"
(let ((first-space (string-match " " line)))
(when first-space
(let ((text (substring line 0 first-space))
(meta (substring line (+ 1 first-space))))
(propertize text 'meta meta)))))
(defun company-flow--parse-output (output)
(when (not (equal output "Error: not enough type information to autocomplete\n"))
(mapcar 'company-flow--make-candidate
(split-string output "\n"))))
(defun company-flow--get-output (process)
"Get the complete output of PROCESS."
(with-demoted-errors "Error while retrieving process output: %S"
(let ((pending-output (process-get process 'company-flow-pending-output)))
(apply #'concat (nreverse pending-output)))))
(defun company-flow--receive-checker-output (process output)
"Receive a syntax checking PROCESS OUTPUT."
(push output (process-get process 'company-flow-pending-output)))
(defun company-flow--process-send-buffer (process)
"Send all contents of current buffer to PROCESS.
Sends all contents of the current buffer to the standard input of
PROCESS, and terminates standard input with EOF."
(save-restriction
(widen)
(process-send-region process (point-min) (point-max)))
;; flow requires EOF be on its own line
(process-send-string process "\n")
(process-send-eof process))
(defun company-flow--candidates-query (prefix callback)
(let* ((line (line-number-at-pos (point)))
(col (+ 1 (current-column)))
(command (list (executable-find company-flow-executable)
"autocomplete"
"--quiet"
buffer-file-name
(number-to-string line)
(number-to-string col)))
(process-connection-type nil)
(process (apply 'start-process "company-flow" nil command)))
(set-process-sentinel process #'company-flow--handle-signal)
(set-process-filter process #'company-flow--receive-checker-output)
(process-put process 'company-flow-callback callback)
(process-put process 'company-flow-prefix prefix)
(company-flow--process-send-buffer process)))
(defun company-flow--prefix ()
"Grab prefix for flow."
(and (or (null company-flow-modes)
(-contains? company-flow-modes major-mode))
company-flow-executable
(executable-find company-flow-executable)
buffer-file-name
(file-exists-p buffer-file-name)
(not (company-in-string-or-comment))
(locate-dominating-file buffer-file-name ".flowconfig")
(or (company-grab-symbol-cons "\\." 1)
'stop)))
(defun company-flow--annotation (candidate)
(format " %s" (get-text-property 0 'meta candidate)))
(defun company-flow--meta (candidate)
(format "%s: %s" candidate (get-text-property 0 'meta candidate)))
(defvar-local company-flow--debounce-state nil)
(defun company-flow--debounce-callback (prefix callback)
(lambda (candidates)
(let ((current-prefix (car company-flow--debounce-state))
(current-callback (cdr company-flow--debounce-state)))
(when (and current-prefix
(company-flow--string-prefix-p prefix current-prefix))
(setq company-flow--debounce-state nil)
(funcall current-callback (all-completions current-prefix candidates))))))
(defun company-flow--prefix-to-string (prefix)
"Return a string or nil from a prefix.
`company-grab-symbol-cons' can return (\"prefix\" . t) or just
\"prefix\", but we only care about the string."
(if (consp prefix)
(car prefix)
prefix))
(defun company-flow--string-prefix-p (a b)
(string-prefix-p (company-flow--prefix-to-string a) (company-flow--prefix-to-string b)))
(defun company-flow--debounce-async (prefix candidate-fn)
"Return a function that will properly debounce candidate queries by comparing the
in-flight query's prefix to PREFIX. CANDIDATE-FN should take two arguments, PREFIX
and the typical async callback.
Note that the candidate list provided to the callback by CANDIDATE-FN will be
filtered via `all-completions' with the most current prefix, so it is not necessary
to do this filtering in CANDIDATE-FN.
Use like:
(cons :async (company-flow--debounce-async arg 'your-query-fn))"
(lambda (callback)
(let ((current-prefix (car company-flow--debounce-state)))
(unless (and current-prefix
(company-flow--string-prefix-p prefix current-prefix))
(funcall candidate-fn prefix (company-flow--debounce-callback prefix callback)))
(setq company-flow--debounce-state (cons (company-flow--prefix-to-string prefix) callback)))))
;;;###autoload
(defun company-flow (command &optional arg &rest _args)
(interactive (list 'interactive))
(pcase command
(`interactive (company-begin-backend 'company-flow))
(`prefix (company-flow--prefix))
(`annotation (company-flow--annotation arg))
(`meta (company-flow--meta arg))
(`sorted t)
(`candidates (cons :async (company-flow--debounce-async arg 'company-flow--candidates-query)))))
(provide 'company-flow)
;;; company-flow.el ends here
|
