code.delx.au - gnu-emacs-elpa/blob - company-gtags.el

   1 ;;; company-gtags.el --- a company-mode completion back-end for GNU Global
   2 ;;
   3 ;; Copyright (C) 2009 Nikolaj Schumacher
   4 ;;
   5 ;; This file is part of company 0.3.
   6 ;;
   7 ;; This program is free software; you can redistribute it and/or
   8 ;; modify it under the terms of the GNU General Public License
   9 ;; as published by the Free Software Foundation; either version 2
  10 ;; of the License, or (at your option) any later version.
  11 ;;
  12 ;; This program is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16 ;;
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 (require 'company)
  21 (eval-when-compile (require 'cl))
  22
  23 (defcustom company-gtags-executable
  24   (executable-find "global")
  25   "*Location of GNU global executable"
  26   :type 'string
  27   :group 'company)
  28
  29 (define-obsolete-variable-alias
  30   'company-gtags-gnu-global-program-name
  31   'company-gtags-executable)
  32
  33 (defvar company-gtags-modes '(c-mode c++-mode jde-mode java-mode php-mode))
  34
  35 (defun company-gtags-fetch-tags (prefix)
  36   (with-temp-buffer
  37     (let (tags)
  38       (when (= 0 (call-process company-gtags-executable nil
  39                                (list (current-buffer) nil) nil "-c" prefix))
  40         (goto-char (point-min))
  41         (split-string (buffer-string) "\n" t)))))
  42
  43 (defun company-gtags-location (tag)
  44   (with-temp-buffer
  45     (when (= 0 (call-process company-gtags-executable nil
  46                              (list (current-buffer) nil) nil "-x" tag))
  47         (goto-char (point-min))
  48         (when (looking-at (concat (regexp-quote tag)
  49                                   "[ \t]+\\([[:digit:]]+\\)"
  50                                   "[ \t]+\\([^ \t]+\\)"))
  51           (cons (expand-file-name (match-string 2))
  52                 (string-to-number (match-string 1)))))))
  53
  54 ;;;###autoload
  55 (defun company-gtags (command &optional arg &rest ignored)
  56   "A `company-mode' completion back-end for GNU Global."
  57   (interactive (list 'interactive))
  58   (case command
  59     ('interactive (company-begin-backend 'company-gtags))
  60     ('prefix (and company-gtags-executable
  61                   (memq major-mode company-gtags-modes)
  62                   (not (company-in-string-or-comment))
  63                   (or (company-grab-symbol) 'stop)))
  64     ('candidates (company-gtags-fetch-tags arg))
  65     ('sorted t)
  66     ('location (company-gtags-location arg))))
  67
  68 (provide 'company-gtags)
  69 ;;; company-gtags.el ends here
  70
  71