+;;; company-semantic.el --- a company-mode back-end using CEDET Semantic
+;;
+;; Copyright (C) 2009 Nikolaj Schumacher
+;;
+;; This file is part of company 0.4.1.
+;;
+;; 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,
+;; 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/>.
+
(require 'company)
(require 'semantic-ia)
(eval-when-compile (require 'cl))
-(defvar company-semantic-context-regexp
- "\\(->\\|\\.\\|\\_<\\)\\(\\(\\s_\\|\\sw\\)+\\_>\\=\\)")
+(defcustom company-semantic-metadata-function 'company-semantic-summary-and-doc
+ "*"
+ :group 'company
+ :type 'function)
+
+(defun company-semantic-doc-or-summary (tag)
+ (or (semantic-documentation-for-tag tag)
+ (funcall semantic-idle-summary-function tag nil t)))
+
+(defun company-semantic-summary-and-doc (tag)
+ (let ((doc (semantic-documentation-for-tag tag))
+ (summary (funcall semantic-idle-summary-function tag nil t)))
+ (and (stringp doc)
+ (string-match "\n*\\(.*\\)$" doc)
+ (setq doc (match-string 1 doc)))
+ (concat (funcall semantic-idle-summary-function tag nil t)
+ (when doc
+ (if (< (+ (length doc) (length summary) 4) (window-width))
+ " -- "
+ "\n"))
+ doc)))
+
+(defun company-semantic-doc-buffer (tag)
+ (let ((doc (semantic-documentation-for-tag tag)))
+ (when doc
+ (with-current-buffer (company-doc-buffer)
+ (insert (funcall semantic-idle-summary-function tag nil t)
+ "\n"
+ doc)
+ (current-buffer)))))
(defsubst company-semantic-completions (prefix)
(ignore-errors
(context (semantic-analyze-current-context)))
(all-completions prefix (semantic-ia-get-completions context (point))))))
+(defun company-semantic-completions-raw (prefix)
+ (let (candidates)
+ (dolist (tag (semantic-analyze-find-tags-by-prefix prefix))
+ (unless (eq (semantic-tag-class tag) 'include)
+ (push (semantic-tag-name tag) candidates)))
+ (delete "" candidates)))
+
+(defun company-semantic--pre-prefix-length (prefix-length)
+ "Sum up the length of all chained symbols before POS.
+Symbols are chained by \".\" or \"->\"."
+ (save-excursion
+ (let ((pos (point)))
+ (goto-char (- (point) prefix-length))
+ (while (looking-back "->\\|\\.")
+ (goto-char (match-beginning 0))
+ (skip-syntax-backward "w_"))
+ (- pos (point)))))
+
+(defun company-semantic--grab ()
+ "Grab the semantic prefix, but return everything before -> or . as length."
+ (let ((symbol (company-grab-symbol)))
+ (when symbol
+ (cons symbol (company-semantic--pre-prefix-length (length symbol))))))
+
+;;;###autoload
(defun company-semantic (command &optional arg &rest ignored)
+ "A `company-mode' completion back-end using CEDET Semantic."
+ (interactive (list 'interactive))
(case command
+ ('interactive (company-begin-backend 'company-semantic))
('prefix (and (memq major-mode '(c-mode c++-mode jde-mode java-mode))
+ (semantic-active-p)
(not (company-in-string-or-comment))
- (or (company-grab company-semantic-context-regexp 2) "")))
+ (or (company-semantic--grab) 'stop)))
('candidates (or (company-semantic-completions arg)
- (mapcar 'semantic-tag-name
- (semantic-analyze-find-tags-by-prefix arg))))))
+ (company-semantic-completions-raw arg)))
+ ('meta (funcall company-semantic-metadata-function
+ (semantic-analyze-find-tag arg)))
+ ('doc-buffer (company-semantic-doc-buffer (semantic-analyze-find-tag arg)))
+ ;; because "" is an empty context and doesn't return local variables
+ ('no-cache (equal arg ""))
+ ('location (let ((tag (semantic-analyze-find-tag arg)))
+ (when (buffer-live-p (semantic-tag-buffer tag))
+ (cons (semantic-tag-buffer tag)
+ (semantic-tag-start tag)))))))
(provide 'company-semantic)
;;; company-semantic.el ends here