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- ;;; company-etags.el --- company-mode completion backend for etags
-
- ;; Copyright (C) 2009-2011, 2014 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
-
-
- ;;; Commentary:
- ;;
-
- ;;; Code:
-
- (require 'company)
- (require 'cl-lib)
- (require 'etags)
-
- (defgroup company-etags nil
- "Completion backend for etags."
- :group 'company)
-
- (defcustom company-etags-use-main-table-list t
- "Always search `tags-table-list' if set.
- If this is disabled, `company-etags' will try to find the one table for each
- buffer automatically."
- :type '(choice (const :tag "off" nil)
- (const :tag "on" t)))
-
- (defcustom company-etags-ignore-case nil
- "Non-nil to ignore case in completion candidates."
- :type 'boolean
- :package-version '(company . "0.7.3"))
-
- (defcustom company-etags-everywhere nil
- "Non-nil to offer completions in comments and strings.
- Set it to t or to a list of major modes."
- :type '(choice (const :tag "Off" nil)
- (const :tag "Any supported mode" t)
- (repeat :tag "Some major modes"
- (symbol :tag "Major mode")))
- :package-version '(company . "0.9.0"))
-
- (defvar company-etags-modes '(prog-mode c-mode objc-mode c++-mode java-mode
- jde-mode pascal-mode perl-mode python-mode))
-
- (defvar-local company-etags-buffer-table 'unknown)
-
- (defun company-etags-find-table ()
- (let ((file (expand-file-name
- "TAGS"
- (locate-dominating-file (or buffer-file-name
- default-directory)
- "TAGS"))))
- (when (and file (file-regular-p file))
- (list file))))
-
- (defun company-etags-buffer-table ()
- (or (and company-etags-use-main-table-list tags-table-list)
- (if (eq company-etags-buffer-table 'unknown)
- (setq company-etags-buffer-table (company-etags-find-table))
- company-etags-buffer-table)))
-
- (defun company-etags--candidates (prefix)
- (let ((tags-table-list (company-etags-buffer-table))
- (tags-file-name tags-file-name)
- (completion-ignore-case company-etags-ignore-case))
- (and (or tags-file-name tags-table-list)
- (fboundp 'tags-completion-table)
- (save-excursion
- (visit-tags-table-buffer)
- (all-completions prefix (tags-completion-table))))))
-
- ;;;###autoload
- (defun company-etags (command &optional arg &rest ignored)
- "`company-mode' completion backend for etags."
- (interactive (list 'interactive))
- (cl-case command
- (interactive (company-begin-backend 'company-etags))
- (prefix (and (apply #'derived-mode-p company-etags-modes)
- (or (eq t company-etags-everywhere)
- (apply #'derived-mode-p company-etags-everywhere)
- (not (company-in-string-or-comment)))
- (company-etags-buffer-table)
- (or (company-grab-symbol) 'stop)))
- (candidates (company-etags--candidates arg))
- (location (let ((tags-table-list (company-etags-buffer-table)))
- (when (fboundp 'find-tag-noselect)
- (save-excursion
- (let ((buffer (find-tag-noselect arg)))
- (cons buffer (with-current-buffer buffer (point))))))))
- (ignore-case company-etags-ignore-case)))
-
- (provide 'company-etags)
- ;;; company-etags.el ends here
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