-;;; company-gtags.el --- a company-mode completion back-end for GNU Global
-;;
-;; Copyright (C) 2009 Nikolaj Schumacher
-;;
-;; This file is part of company.
-;;
-;; 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 2
-;; of the License, or (at your option) any later version.
-;;
-;; This program is distributed in the hope that it will be useful,
+;;; company-gtags.el --- company-mode completion back-end for GNU Global
+
+;; Copyright (C) 2009-2011 Free Software Foundation, Inc.
+
+;; Author: Nikolaj Schumacher
+
+;; 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 this program. If not, see <http://www.gnu.org/licenses/>.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+
+;;; Commentary:
+;;
+
+;;; Code:
(require 'company)
-(eval-when-compile (require 'cl))
+(require 'cl-lib)
-(defcustom company-gtags-gnu-global-program-name
- (or (locate-file "global" exec-path exec-suffixes 'file-executable-p)
- "global")
- "*"
- :type 'string
+(defgroup company-gtags nil
+ "Completion back-end for GNU Global."
:group 'company)
-(defvar company-gtags-symbol-regexp
- "\\_<[A-Za-z_][A-Za-z_0-9]*\\_>")
+(defcustom company-gtags-executable
+ (executable-find "global")
+ "Location of GNU global executable."
+ :type 'string)
-(defvar company-gtags-modes '(c-mode c++-mode jde-mode java-mode php-mode))
+(define-obsolete-variable-alias
+ 'company-gtags-gnu-global-program-name
+ 'company-gtags-executable "earlier")
+
+(defvar company-gtags--tags-available-p 'unknown)
+(make-variable-buffer-local 'company-gtags--tags-available-p)
-(defvar company-gtags-available 'unknown)
-(make-variable-buffer-local 'company-gtags-available)
+(defvar company-gtags-modes '(c-mode c++-mode jde-mode java-mode php-mode))
-(defun company-gtags-available ()
- (when (eq company-gtags-available 'unknown)
- (condition-case err
- (setq company-gtags-available
- (= 0 (call-process company-gtags-gnu-global-program-name
- nil nil nil "-c" "WHATEVER")))
- (error
- (message "Company: GNU Global not found")
- (setq-default company-gtags-available nil))))
- company-gtags-available)
+(defun company-gtags--tags-available-p ()
+ (if (eq company-gtags--tags-available-p 'unknown)
+ (setq company-gtags--tags-available-p
+ (locate-dominating-file buffer-file-name "GTAGS"))
+ company-gtags--tags-available-p))
(defun company-gtags-fetch-tags (prefix)
(with-temp-buffer
(let (tags)
- (when (= 0 (call-process "global" nil (list (current-buffer) nil)
- nil "-c" prefix))
+ (when (= 0 (call-process company-gtags-executable nil
+ (list (current-buffer) nil) nil "-c" prefix))
(goto-char (point-min))
- (while (looking-at company-gtags-symbol-regexp)
- (push (match-string-no-properties 0) tags)
- (forward-line)))
- (nreverse tags))))
+ (split-string (buffer-string) "\n" t)))))
+(defun company-gtags-location (tag)
+ (with-temp-buffer
+ (when (= 0 (call-process company-gtags-executable nil
+ (list (current-buffer) nil) nil "-x" tag))
+ (goto-char (point-min))
+ (when (looking-at (concat (regexp-quote tag)
+ "[ \t]+\\([[:digit:]]+\\)"
+ "[ \t]+\\([^ \t]+\\)"))
+ (cons (expand-file-name (match-string 2))
+ (string-to-number (match-string 1)))))))
+
+;;;###autoload
(defun company-gtags (command &optional arg &rest ignored)
- (case command
- ('prefix (and (memq major-mode company-gtags-modes)
- (company-gtags-available)
- (or (company-grab company-gtags-symbol-regexp) "")))
- ('candidates (company-gtags-fetch-tags arg))
- ('sorted t)))
+ "`company-mode' completion back-end for GNU Global."
+ (interactive (list 'interactive))
+ (cl-case command
+ (interactive (company-begin-backend 'company-gtags))
+ (prefix (and company-gtags-executable
+ (memq major-mode company-gtags-modes)
+ (not (company-in-string-or-comment))
+ (company-gtags--tags-available-p)
+ (or (company-grab-symbol) 'stop)))
+ (candidates (company-gtags-fetch-tags arg))
+ (sorted t)
+ (location (company-gtags-location arg))))
(provide 'company-gtags)
;;; company-gtags.el ends here
-
-