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ac-cider.el
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ac-cider.el
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;;; ac-cider.el --- Clojure auto-complete sources using CIDER
;; Copyright (C) 2012-2016 Alex Yakushev <alex@bytopia.org>
;; Author: Alex Yakushev <alex@bytopia.org>
;; Steve Purcell <steve@sanityinc.com>
;; Sam Aaron <samaaron@gmail.com>
;;
;; URL: https://github.com/clojure-emacs/ac-cider
;; Keywords: languages, clojure, nrepl, cider, compliment
;; Version: 0.2.3
;; Package-Requires: ((cider "0.8.0") (auto-complete "1.4") (cl-lib "0.3"))
;; This program 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.
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Provides a number of auto-complete sources for Clojure projects using CIDER
;; and compliment. This is a replacement for now deprecated ac-nrepl project by
;; Steve Purcell.
;;; Installation:
;; Available as a package in melpa.org.
;; M-x package-install ac-cider
;;; Usage:
;; (require 'ac-cider)
;; (add-hook 'cider-mode-hook 'ac-flyspell-workaround)
;; (add-hook 'cider-mode-hook 'ac-cider-setup)
;; (add-hook 'cider-repl-mode-hook 'ac-cider-setup)
;; (eval-after-load "auto-complete"
;; '(progn
;; (add-to-list 'ac-modes 'cider-mode)
;; (add-to-list 'ac-modes 'cider-repl-mode)))
;; By default, entries in the popup menu will also display the namespace that
;; the symbol belongs to. To disable this behavior, add to your init file:
;; (setq ac-cider-show-ns nil)
;; If you want to trigger auto-complete using TAB in CIDER buffers, add this to
;; your configuration file, but note that it is incompatible with (setq
;; tab-always-indent 'complete):
;; (defun set-auto-complete-as-completion-at-point-function ()
;; (setq completion-at-point-functions '(auto-complete)))
;; (add-hook 'auto-complete-mode-hook 'set-auto-complete-as-completion-at-point-function)
;;
;; (add-hook 'cider-mode-hook 'set-auto-complete-as-completion-at-point-function)
;;; Code:
(require 'cider)
(require 'auto-complete)
(require 'cl-lib)
(defun ac-cider-available-p ()
"Return t if CIDER supports completion, otherwise nil."
(functionp 'cider-complete))
(defvar ac-cider-documentation-cache '())
;; customization group
(defgroup ac-cider nil
"auto-complete sources for cider."
:prefix "ac-cider-"
:group 'completion)
(defcustom ac-cider-show-ns t
"Non-nil means rows in the AC popup menu will show the namespace of the item."
:type 'boolean
:group 'ac-cider)
(defun ac-cider-prepare-candidates (candidates)
"Apply changes for auto-complete to the candidates returned from cider-complete."
(if ac-cider-show-ns
(mapcar
(lambda (candidate)
(let ((ns (get-text-property 0 'ns candidate)))
;; Copy the 'ns' value to 'summary' for auto-complete to display
(when ns
(add-text-properties 0 1 `(summary ,ns) candidate))
candidate))
candidates)
candidates))
(defun ac-cider-candidates-everything ()
"Return all candidates for a symbol at point."
(setq ac-cider-documentation-cache nil)
(when (cider-connected-p)
(ac-cider-prepare-candidates (cider-complete ac-prefix))))
(defun ac-cider-documentation (symbol)
"Return documentation for the given SYMBOL, if available.
Caches fetched documentation for the current completion call."
(when symbol
(let ((cached-doc (assoc (substring-no-properties symbol)
ac-cider-documentation-cache)))
(if cached-doc
(cdr cached-doc)
(let* ((doc
(substring-no-properties
(replace-regexp-in-string
"\r" ""
(nrepl-dict-get (cider-nrepl-send-sync-request
(list "op" "complete-doc"
"session" (cider-current-session)
"ns" (cider-current-ns)
"symbol" symbol))
"completion-doc"))))
(doc (if (string= "\"\"" doc)
"No documentation available."
doc)))
(add-to-list 'ac-cider-documentation-cache
(cons (substring-no-properties symbol) doc))
doc)))))
(defun ac-cider--is-separator (c)
(or (= c 45) (= c 46)))
(defun ac-cider--is-capital (c)
(and (<= 65 c) (<= c 90)))
(defun ac-cider-fuzzy-matches-p (prefix candidate)
"Return t if PREFIX and CANDIDATE are matched."
(let ((pre (string-to-list prefix))
(cand (string-to-list candidate))
(camelcase nil))
(when (= (car pre) 46)
(setq camelcase t)
(setq pre (cdr pre))
(setq cand (cdr cand)))
(if (string-match-p (regexp-quote prefix) candidate)
t
(let ((result :not-yet) (skipping nil))
(when (= (car pre) (car cand))
(while (eq result :not-yet)
(cond ((not pre) (setq result t))
((not cand) (setq result nil))
(skipping (if camelcase
(if (ac-cider--is-capital (car cand))
(setq skipping nil)
(setq cand (cdr cand)))
(if (ac-cider--is-separator (car cand))
(progn
(when (ac-cider--is-separator (car pre))
(setq pre (cdr pre)))
(setq cand (cdr cand))
(setq skipping nil))
(setq cand (cdr cand)))))
((= (car pre) (car cand)) (progn (setq pre (cdr pre))
(setq cand (cdr cand))))
(t (progn (setq skipping
(or camelcase
(not (ac-cider--is-separator (car cand)))))
(setq cand (cdr cand))))))
result)))))
(defun ac-cider-match-fuzzy (prefix candidates)
"Returns candidates that match fuzzily with the prefix."
(cl-remove-if-not (lambda (cand)
(ac-cider-fuzzy-matches-p prefix cand))
candidates))
;;;###autoload
(defface ac-cider-candidate-face
'((t (:inherit ac-candidate-face)))
"Face for nrepl candidates."
:group 'auto-complete)
;;;###autoload
(defface ac-cider-selection-face
'((t (:inherit ac-selection-face)))
"Face for the nrepl selected candidate."
:group 'auto-complete)
;;;###autoload
(defconst ac-cider-source-defaults
'((available . ac-cider-available-p)
(candidate-face . ac-cider-candidate-face)
(selection-face . ac-cider-selection-face)
(prefix . cider-completion-symbol-start-pos)
(match . ac-cider-match-fuzzy)
(document . ac-cider-documentation)
(cache))
"Defaults common to the various completion sources.")
;;;###autoload
(defvar ac-source-cider-everything
(append
'((candidates . ac-cider-candidates-everything)
(symbol . "v"))
ac-cider-source-defaults)
"Auto-complete source for CIDER buffers.")
;;;###autoload
(defun ac-cider-setup ()
"Add the CIDER completion source to the front of `ac-sources'.
This affects only the current buffer."
(interactive)
(setq-default ac-use-fuzzy nil)
(add-to-list 'ac-sources 'ac-source-cider-everything))
;;;###autoload
(defun ac-cider-popup-doc ()
"A popup alternative to `cider-doc'."
(interactive)
(popup-tip (ac-cider-documentation (symbol-name (symbol-at-point)))
:point (cider-completion-symbol-start-pos)
:around t
:scroll-bar t
:margin t))
(provide 'ac-cider)
;; Local Variables:
;; coding: utf-8
;; indent-tabs-mode: nil
;; eval: (checkdoc-minor-mode 1)
;; End:
;;; ac-cider.el ends here