Merge changes from the GNU ELPA repository

[gnu-emacs-elpa] / company-clang.el

diff --git a/company-clang.el b/company-clang.el
index 88f0f6f562523df05f079e87afe6b1d059a8d4c5..7cb85e3c644640f3f6dbac98ba97b9bd3c5e90fe 100644 (file)
--- a/company-clang.el
+++ b/company-clang.el
@@ -1,28 +1,36 @@
-;;; company-clang.el --- a company-mode completion back-end for clang
-;;
-;; Copyright (C) 2010 Nikolaj Schumacher
-;;
-;; This file is part of company 0.4.3.
-;;
-;; 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-clang.el --- A company-mode completion back-end for clang
+
+;; 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))
 
 (defcustom company-clang-executable
   (executable-find "clang")
-  "*Location of clang executable"
+  "*Location of clang executable."
   :group 'company-clang
   :type 'file)
 
@@ -101,6 +109,7 @@ Prefix files (-include ...) can be selected with
   (goto-char (point-min))
   (let ((pattern (format company-clang--completion-pattern
                          (regexp-quote prefix)))
+        (case-fold-search nil)
         lines match)
     (while (re-search-forward pattern nil t)
       (setq match (match-string-no-properties 1))
@@ -145,7 +154,7 @@ Prefix files (-include ...) can be selected with
             (1+ (current-column)))))
 
 (defsubst company-clang--build-complete-args (pos)
-  (append '("-cc1" "-fsyntax-only")
+  (append '("-cc1" "-fsyntax-only" "-code-completion-macros")
           company-clang-arguments
           (when (stringp company-clang--prefix)
             (list "-include" (expand-file-name company-clang--prefix)))
@@ -156,7 +165,7 @@ Prefix files (-include ...) can be selected with
 (defun company-clang--candidates (prefix)
   (and company-clang-auto-save
        (buffer-modified-p)
-       (save-buffer))
+       (basic-save-buffer))
   (when (null company-clang--prefix)
     (company-clang-set-prefix (or (funcall company-clang-prefix-guesser)
                                   'none)))
@@ -164,6 +173,33 @@ Prefix files (-include ...) can be selected with
          prefix
          (company-clang--build-complete-args (- (point) (length prefix)))))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defconst company-clang-required-version "1.1")
+
+(defsubst company-clang-version ()
+  "Return the version of `company-clang-executable'."
+  (with-temp-buffer
+    (switch-to-buffer (current-buffer))
+    (call-process company-clang-executable nil t nil "--version")
+    (goto-char (point-min))
+    (if (re-search-forward "\\clang version \\([0-9.]+\\)" nil t)
+        (match-string-no-properties 1)
+      "0")))
+
+(defun company-clang-objc-templatify (selector)
+  (let* ((end (point))
+         (beg (- (point) (length selector)))
+         (templ (company-template-declare-template beg end)))
+    (save-excursion
+      (goto-char beg)
+      (while (search-forward ":" end t)
+        (replace-match ":  ")
+        (incf end 2)
+        (company-template-add-field templ (1- (match-end 0)) "<arg>"))
+      (delete-char -1))
+    (company-template-move-to-first templ)))
+
 (defun company-clang (command &optional arg &rest ignored)
   "A `company-mode' completion back-end for clang.
 Clang is a parser for C and ObjC.  The unreleased development version of
@@ -178,13 +214,21 @@ Completions only work correctly when the buffer has been saved.
 `company-clang-auto-save' determines whether to do this automatically."
   (interactive (list 'interactive))
   (case command
-        ('interactive (company-begin-backend 'company-clang))
-        ('prefix (and (memq major-mode company-clang-modes)
-                      buffer-file-name
-                      company-clang-executable
-                      (not (company-in-string-or-comment))
-                      (or (company-grab-symbol) 'stop)))
-        ('candidates (company-clang--candidates arg))))
+    (interactive (company-begin-backend 'company-clang))
+    (init (unless company-clang-executable
+            (error "Company found no clang executable"))
+          (when (version< (company-clang-version)
+                          company-clang-required-version)
+            (error "Company requires clang version 1.1")))
+    (prefix (and (memq major-mode company-clang-modes)
+                 buffer-file-name
+                 company-clang-executable
+                 (not (company-in-string-or-comment))
+                 (or (company-grab-symbol) 'stop)))
+    (candidates (company-clang--candidates arg))
+    (post-completion (and (derived-mode-p 'objc-mode)
+                          (string-match ":" arg)
+                          (company-clang-objc-templatify arg)))))
 
 (provide 'company-clang)
 ;;; company-clang.el ends here