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;;; ac-company.el --- Use Company Backends for Auto-Complete.
;; Copyright (C) 2009, 2010 Taiki SUGAWARA
;; Author: Taiki SUGAWARA <buzz.taiki@gmail.com>
;; URL: http://github.com/buzztaiki/auto-complete
;; Keywords: convenience
;; Version: 0.2
;; 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:
;; For example, if you want to use company-elisp for auto-complete,
;; put following to your .emacs:
;;
;; (require 'ac-company)
;; (ac-company-define-source ac-source-company-elisp company-elisp)
;; (add-hook 'emacs-lisp-mode-hook
;; (lambda ()
;; (add-to-list 'ac-sources 'ac-source-company-elisp)))
;;
;; You can overrides attributes. For example, if you want to add
;; symbol to ac-source-company-elisp, put following:
;;
;; (ac-company-define-source ac-source-company-elisp company-elisp
;; (symbol . "s"))
;;; Code:
(require 'auto-complete)
(require 'company nil t)
(defmacro ac-company-define-source (name backend &rest overrides)
"Define auto-complete source NAME from company BACKEND.
When OVERRIDES is specified, OVERRIDES is prepend to original source."
`(defvar ,name
'(,@overrides
(candidates . (ac-company-candidates ',backend))
(prefix . (ac-company-prefix ',backend))
(document . (lambda (item) (ac-company-document ',backend item))))))
(defun ac-company-prefix (backend)
(require backend nil t)
(when (fboundp backend)
(let ((prefix (funcall backend 'prefix)))
(when (stringp prefix)
(- (point) (length prefix))))))
(defun ac-company-candidates (backend)
(funcall backend 'candidates ac-prefix))
(defun ac-company-meta-as-document (backend item)
(funcall backend 'meta item))
(defun ac-company-doc-buffer-as-document (backend item)
(with-current-buffer (funcall backend 'doc-buffer item)
(buffer-string)))
(defun ac-company-document (backend item)
(or (ac-company-doc-buffer-as-document backend item)
(ac-company-meta-as-document backend item)))
(provide 'ac-company)
;;; ac-company.el ends here