-;;; company-capf.el --- company-mode completion-at-point-functions back-end -*- lexical-binding: t -*-
+;;; company-capf.el --- company-mode completion-at-point-functions backend -*- lexical-binding: t -*-
-;; Copyright (C) 2013-2014 Free Software Foundation, Inc.
+;; Copyright (C) 2013-2016 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
;;; Code:
-(eval-when-compile (require 'cl))
+(require 'company)
+(require 'cl-lib)
+
+(defvar company--capf-cache nil)
(defun company--capf-data ()
- ;; Ignore tags-completion-at-point-function because it subverts company-etags
- ;; in the default value of company-backends, where the latter comes later.
- (letf* (((default-value 'completion-at-point-functions) nil)
- (data (run-hook-wrapped 'completion-at-point-functions
- ;; Ignore misbehaving functions.
- #'completion--capf-wrapper 'optimist)))
- (when (consp data) 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)))
+ (completion-at-point-functions (company--capf-workaround))
+ (data (run-hook-wrapped 'completion-at-point-functions
+ ;; Ignore misbehaving functions.
+ #'completion--capf-wrapper 'optimist)))
+ (when (and (consp (cdr data)) (integer-or-marker-p (nth 1 data))) data)))
+
+(declare-function python-shell-get-process "python")
+
+(defun company--capf-workaround ()
+ ;; For http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18067
+ (if (or (not (listp completion-at-point-functions))
+ (not (memq 'python-completion-complete-at-point completion-at-point-functions))
+ (python-shell-get-process))
+ completion-at-point-functions
+ (remq 'python-completion-complete-at-point completion-at-point-functions)))
(defun company-capf (command &optional arg &rest _args)
- "`company-mode' back-end using `completion-at-point-functions'.
-Requires Emacs 24.1 or newer."
+ "`company-mode' backend 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))))))
+ (let ((length (plist-get (nthcdr 4 res) :company-prefix-length))
+ (prefix (buffer-substring-no-properties (nth 1 res) (point))))
+ (cond
+ ((> (nth 2 res) (point)) 'stop)
+ (length (cons prefix length))
+ (t prefix))))))
(`candidates
(let ((res (company--capf-data)))
(when res
(buffer-substring (nth 1 res) (nth 2 res))
(nth 3 res) (plist-get (nthcdr 4 res) :predicate))))
(cdr (assq 'display-sort-function meta))))))
- (`common-part
+ (`match
;; Can't just use 0 when base-size (see above) is non-zero.
(let ((start (if (get-text-property 0 'face arg)
0
(text-property-not-all start (length arg)
'face value arg))
(length arg)))))
- (`duplicates nil) ;Don't bother.
- (`no-cache t) ;FIXME: Improve!
+ (`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))))
(`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)))
+ (exit-function (plist-get (nthcdr 4 res) :exit-function))
+ (table (nth 3 res))
+ (pred (plist-get (nthcdr 4 res) :predicate)))
(if exit-function
- (funcall exit-function arg 'finished))))
+ ;; Follow the example of `completion--done'.
+ (funcall exit-function arg
+ (if (eq (try-completion arg table pred) t)
+ 'finished 'sole)))))
))
(provide 'company-capf)