+;;; company-semantic.el --- company-mode completion backend using Semantic
+
+;; Copyright (C) 2009-2011, 2013-2016 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 'semantic-ia)
-(eval-when-compile (require 'cl))
+(require 'company-template)
+(require 'cl-lib)
+
+(defvar semantic-idle-summary-function)
+(declare-function semantic-documentation-for-tag "semantic/doc" )
+(declare-function semantic-analyze-current-context "semantic/analyze")
+(declare-function semantic-analyze-possible-completions "semantic/complete")
+(declare-function semantic-analyze-find-tags-by-prefix "semantic/analyze/fcn")
+(declare-function semantic-tag-class "semantic/tag")
+(declare-function semantic-tag-name "semantic/tag")
+(declare-function semantic-tag-start "semantic/tag")
+(declare-function semantic-tag-buffer "semantic/tag")
+(declare-function semantic-active-p "semantic")
+(declare-function semantic-format-tag-prototype "semantic/format")
+
+(defgroup company-semantic nil
+ "Completion backend using Semantic."
+ :group 'company)
(defcustom company-semantic-metadata-function 'company-semantic-summary-and-doc
- "*"
- :group 'company
+ "The function turning a semantic tag into doc information."
:type 'function)
-(defvar company-semantic-context-regexp
- "\\(->\\|\\.\\|\\_<\\)\\(\\(\\s_\\|\\sw\\)+\\_>\\=\\)")
+(defcustom company-semantic-begin-after-member-access t
+ "When non-nil, automatic completion will start whenever the current
+symbol is preceded by \".\", \"->\" or \"::\", ignoring
+`company-minimum-prefix-length'.
+
+If `company-begin-commands' is a list, it should include `c-electric-lt-gt'
+and `c-electric-colon', for automatic completion right after \">\" and
+\":\".")
+
+(defcustom company-semantic-insert-arguments t
+ "When non-nil, insert function arguments as a template after completion."
+ :type 'boolean
+ :package-version '(company . "0.9.0"))
+
+(defvar company-semantic-modes '(c-mode c++-mode jde-mode java-mode))
+
+(defvar-local company-semantic--current-tags nil
+ "Tags for the current context.")
+
+(defun company-semantic-documentation-for-tag (tag)
+ (when (semantic-tag-buffer tag)
+ ;; When TAG's buffer is unknown, the function below raises an error.
+ (semantic-documentation-for-tag tag)))
(defun company-semantic-doc-or-summary (tag)
- (or (semantic-documentation-for-tag tag)
- (funcall semantic-idle-summary-function tag nil t)))
+ (or (company-semantic-documentation-for-tag tag)
+ (and (require 'semantic-idle nil t)
+ (require 'semantic/idle nil t)
+ (funcall semantic-idle-summary-function tag nil t))))
(defun company-semantic-summary-and-doc (tag)
- (let ((doc (semantic-documentation-for-tag tag))
+ (let ((doc (company-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)
+ (concat summary
(when doc
(if (< (+ (length doc) (length summary) 4) (window-width))
" -- "
"\n"))
doc)))
+(defun company-semantic-doc-buffer (tag)
+ (let ((doc (company-semantic-documentation-for-tag tag)))
+ (when doc
+ (company-doc-buffer
+ (concat (funcall semantic-idle-summary-function tag nil t)
+ "\n"
+ doc)))))
+
(defsubst company-semantic-completions (prefix)
(ignore-errors
(let ((completion-ignore-case nil)
(context (semantic-analyze-current-context)))
- (all-completions prefix (semantic-ia-get-completions context (point))))))
+ (setq company-semantic--current-tags
+ (semantic-analyze-possible-completions context 'no-unique))
+ (all-completions prefix company-semantic--current-tags))))
+
+(defun company-semantic-completions-raw (prefix)
+ (setq company-semantic--current-tags nil)
+ (dolist (tag (semantic-analyze-find-tags-by-prefix prefix))
+ (unless (eq (semantic-tag-class tag) 'include)
+ (push tag company-semantic--current-tags)))
+ (delete "" (mapcar 'semantic-tag-name company-semantic--current-tags)))
+
+(defun company-semantic-annotation (argument tags)
+ (let* ((tag (assq argument tags))
+ (kind (when tag (elt tag 1))))
+ (cl-case kind
+ (function (let* ((prototype (semantic-format-tag-prototype tag nil nil))
+ (par-pos (string-match "(" prototype)))
+ (when par-pos (substring prototype par-pos)))))))
+
+(defun company-semantic--prefix ()
+ (if company-semantic-begin-after-member-access
+ (company-grab-symbol-cons "\\.\\|->\\|::" 2)
+ (company-grab-symbol)))
+;;;###autoload
(defun company-semantic (command &optional arg &rest ignored)
- (case command
- ('prefix (and (memq major-mode '(c-mode c++-mode jde-mode java-mode))
- (not (company-in-string-or-comment))
- (or (company-grab company-semantic-context-regexp 2) "")))
- ('candidates (or (company-semantic-completions arg)
- (mapcar 'semantic-tag-name
- (semantic-analyze-find-tags-by-prefix arg))))
- ('meta (funcall company-semantic-metadata-function
- (semantic-analyze-find-tag arg)))))
+ "`company-mode' completion backend using CEDET Semantic."
+ (interactive (list 'interactive))
+ (cl-case command
+ (interactive (company-begin-backend 'company-semantic))
+ (prefix (and (featurep 'semantic)
+ (semantic-active-p)
+ (memq major-mode company-semantic-modes)
+ (not (company-in-string-or-comment))
+ (or (company-semantic--prefix) 'stop)))
+ (candidates (if (and (equal arg "")
+ (not (looking-back "->\\|\\." (- (point) 2))))
+ (company-semantic-completions-raw arg)
+ (company-semantic-completions arg)))
+ (meta (funcall company-semantic-metadata-function
+ (assoc arg company-semantic--current-tags)))
+ (annotation (company-semantic-annotation arg
+ company-semantic--current-tags))
+ (doc-buffer (company-semantic-doc-buffer
+ (assoc arg company-semantic--current-tags)))
+ ;; Because "" is an empty context and doesn't return local variables.
+ (no-cache (equal arg ""))
+ (duplicates t)
+ (location (let ((tag (assoc arg company-semantic--current-tags)))
+ (when (buffer-live-p (semantic-tag-buffer tag))
+ (cons (semantic-tag-buffer tag)
+ (semantic-tag-start tag)))))
+ (post-completion (let ((anno (company-semantic-annotation
+ arg company-semantic--current-tags)))
+ (when (and company-semantic-insert-arguments anno)
+ (insert anno)
+ (company-template-c-like-templatify (concat arg anno)))
+ ))))
(provide 'company-semantic)
;;; company-semantic.el ends here