-;;; company-semantic.el --- company-mode back-end using CEDET Semantic
+;;; company-semantic.el --- company-mode completion backend using Semantic
-;; Copyright (C) 2009-2011, 2013 Free Software Foundation, Inc.
+;; Copyright (C) 2009-2011, 2013-2016 Free Software Foundation, Inc.
;; Author: Nikolaj Schumacher
;;; Code:
(require 'company)
-(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-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
"The function turning a semantic tag into doc information."
- :group 'company
:type 'function)
+(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 company-semantic--current-tags nil
+(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)
+ (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))
" -- "
doc)))
(defun company-semantic-doc-buffer (tag)
- (let ((doc (semantic-documentation-for-tag tag)))
+ (let ((doc (company-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)))))
+ (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)))
(setq company-semantic--current-tags
- (semantic-analyze-possible-completions context))
+ (semantic-analyze-possible-completions context 'no-unique))
(all-completions prefix company-semantic--current-tags))))
(defun company-semantic-completions-raw (prefix)
(push tag company-semantic--current-tags)))
(delete "" (mapcar 'semantic-tag-name company-semantic--current-tags)))
-(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))))))
+(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)
- "`company-mode' completion back-end using CEDET Semantic."
+ "`company-mode' completion backend using CEDET Semantic."
(interactive (list 'interactive))
- (case command
+ (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--grab) 'stop)))
+ (or (company-semantic--prefix) 'stop)))
(candidates (if (and (equal arg "")
- (not (looking-back "->\\|\\.")))
+ (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)))))))
+ (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