154 lines
6.4 KiB
EmacsLisp
154 lines
6.4 KiB
EmacsLisp
;;; company-capf.el --- company-mode completion-at-point-functions back-end -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2013-2014 Free Software Foundation, Inc.
|
|
|
|
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
|
|
|
|
;; 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 <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
;;; Commentary:
|
|
;;
|
|
|
|
;;; Code:
|
|
|
|
(require 'company)
|
|
(require 'cl-lib)
|
|
|
|
(defvar company--capf-cache nil)
|
|
|
|
(defun company--capf-data ()
|
|
(let ((cache company--capf-cache))
|
|
(if (and (equal (current-buffer) (car cache))
|
|
(equal (point) (car (setq cache (cdr cache))))
|
|
(equal (buffer-chars-modified-tick) (car (setq cache (cdr cache)))))
|
|
(cadr cache)
|
|
(let ((data (company--capf-data-real)))
|
|
(setq company--capf-cache
|
|
(list (current-buffer) (point) (buffer-chars-modified-tick) data))
|
|
data))))
|
|
|
|
(defun company--capf-data-real ()
|
|
(cl-letf* (((default-value 'completion-at-point-functions)
|
|
;; Ignore tags-completion-at-point-function because it subverts
|
|
;; company-etags in the default value of company-backends, where
|
|
;; the latter comes later.
|
|
(remove 'tags-completion-at-point-function
|
|
(default-value 'completion-at-point-functions)))
|
|
(data (run-hook-wrapped 'completion-at-point-functions
|
|
;; Ignore misbehaving functions.
|
|
#'completion--capf-wrapper 'optimist)))
|
|
(when (and (consp (cdr data)) (numberp (nth 1 data))) data)))
|
|
|
|
(defun company-capf (command &optional arg &rest _args)
|
|
"`company-mode' back-end using `completion-at-point-functions'."
|
|
(interactive (list 'interactive))
|
|
(pcase command
|
|
(`interactive (company-begin-backend 'company-capf))
|
|
(`prefix
|
|
(let ((res (company--capf-data)))
|
|
(when res
|
|
(if (> (nth 2 res) (point))
|
|
'stop
|
|
(buffer-substring-no-properties (nth 1 res) (point))))))
|
|
(`candidates
|
|
(let ((res (company--capf-data)))
|
|
(when res
|
|
(let* ((table (nth 3 res))
|
|
(pred (plist-get (nthcdr 4 res) :predicate))
|
|
(meta (completion-metadata
|
|
(buffer-substring (nth 1 res) (nth 2 res))
|
|
table pred))
|
|
(sortfun (cdr (assq 'display-sort-function meta)))
|
|
(candidates (completion-all-completions arg table pred (length arg)))
|
|
(last (last candidates))
|
|
(base-size (and (numberp (cdr last)) (cdr last))))
|
|
(when base-size
|
|
(setcdr last nil))
|
|
(when sortfun
|
|
(setq candidates (funcall sortfun candidates)))
|
|
(if (not (zerop (or base-size 0)))
|
|
(let ((before (substring arg 0 base-size)))
|
|
(mapcar (lambda (candidate)
|
|
(concat before candidate))
|
|
candidates))
|
|
candidates)))))
|
|
(`sorted
|
|
(let ((res (company--capf-data)))
|
|
(when res
|
|
(let ((meta (completion-metadata
|
|
(buffer-substring (nth 1 res) (nth 2 res))
|
|
(nth 3 res) (plist-get (nthcdr 4 res) :predicate))))
|
|
(cdr (assq 'display-sort-function meta))))))
|
|
(`match
|
|
;; Can't just use 0 when base-size (see above) is non-zero.
|
|
(let ((start (if (get-text-property 0 'font-lock-face arg)
|
|
0
|
|
(next-single-property-change 0 'font-lock-face arg))))
|
|
(when start
|
|
;; completions-common-part comes first, but we can't just look for this
|
|
;; value because it can be in a list.
|
|
(or
|
|
(let ((value (get-text-property start 'font-lock-face arg)))
|
|
(text-property-not-all start (length arg)
|
|
'font-lock-face value arg))
|
|
(length arg)))))
|
|
(`duplicates t)
|
|
(`no-cache t) ;Not much can be done here, as long as we handle
|
|
;non-prefix matches.
|
|
(`meta
|
|
(let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-docsig)))
|
|
(when f (funcall f arg))))
|
|
(`doc-buffer
|
|
(let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-doc-buffer)))
|
|
(when f (funcall f arg))))
|
|
(`location
|
|
(let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-location)))
|
|
(when f (funcall f arg))))
|
|
(`annotation
|
|
(save-excursion
|
|
;; FIXME: `company-begin' sets `company-point' after calling
|
|
;; `company--begin-new'. We shouldn't rely on `company-point' here,
|
|
;; better to cache the capf-data value instead. However: we can't just
|
|
;; save the last capf-data value in `prefix', because that command can
|
|
;; get called more often than `candidates', and at any point in the
|
|
;; buffer (https://github.com/company-mode/company-mode/issues/153).
|
|
;; We could try propertizing the returned prefix string, but it's not
|
|
;; passed to `annotation', and `company-prefix' is set only after
|
|
;; `company--strip-duplicates' is called.
|
|
(when company-point
|
|
(goto-char company-point))
|
|
(let ((f (plist-get (nthcdr 4 (company--capf-data)) :annotation-function)))
|
|
(when f (funcall f arg)))))
|
|
(`require-match
|
|
(plist-get (nthcdr 4 (company--capf-data)) :company-require-match))
|
|
(`init nil) ;Don't bother: plenty of other ways to initialize the code.
|
|
(`post-completion
|
|
(let* ((res (company--capf-data))
|
|
(exit-function (plist-get (nthcdr 4 res) :exit-function))
|
|
(table (nth 3 res))
|
|
(pred (plist-get (nthcdr 4 res) :predicate)))
|
|
(if exit-function
|
|
;; Follow the example of `completion--done'.
|
|
(funcall exit-function arg
|
|
(if (eq (try-completion arg table pred) t)
|
|
'finished 'sole)))))
|
|
))
|
|
|
|
(provide 'company-capf)
|
|
|
|
;;; company-capf.el ends here
|