code.delx.au - gnu-emacs-elpa/blob - company-dabbrev-code.el

   1 ;;; company-dabbrev-code.el --- dabbrev-like company-mode backend for code  -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2009, 2011, 2014  Free Software Foundation, Inc.
   4
   5 ;; Author: Nikolaj Schumacher
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software: you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation, either version 3 of the License, or
  12 ;; (at your option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  21
  22
  23 ;;; Commentary:
  24 ;;
  25
  26 ;;; Code:
  27
  28 (require 'company)
  29 (require 'company-dabbrev)
  30 (require 'cl-lib)
  31
  32 (defgroup company-dabbrev-code nil
  33   "dabbrev-like completion backend for code."
  34   :group 'company)
  35
  36 (defcustom company-dabbrev-code-modes
  37   '(prog-mode
  38     batch-file-mode csharp-mode css-mode erlang-mode haskell-mode jde-mode
  39     lua-mode python-mode)
  40   "Modes that use `company-dabbrev-code'.
  41 In all these modes (and their derivatives) `company-dabbrev-code' will
  42 complete only symbols, not text in comments or strings.  In other modes
  43 `company-dabbrev-code' will pass control to other backends
  44 \(e.g. `company-dabbrev'\).  Value t means complete in all modes."
  45   :type '(choice (repeat :tag "Some modes" (symbol :tag "Major mode"))
  46                  (const :tag "All modes" t)))
  47
  48 (defcustom company-dabbrev-code-other-buffers t
  49   "Determines whether `company-dabbrev-code' should search other buffers.
  50 If `all', search all other buffers, except the ignored ones.  If t, search
  51 buffers with the same major mode.  If `code', search all buffers with major
  52 modes in `company-dabbrev-code-modes', or derived from one of them.  See
  53 also `company-dabbrev-code-time-limit'."
  54   :type '(choice (const :tag "Off" nil)
  55                  (const :tag "Same major mode" t)
  56                  (const :tag "Code major modes" code)
  57                  (const :tag "All" all)))
  58
  59 (defcustom company-dabbrev-code-time-limit .1
  60   "Determines how long `company-dabbrev-code' should look for matches."
  61   :type '(choice (const :tag "Off" nil)
  62                  (number :tag "Seconds")))
  63
  64 (defcustom company-dabbrev-code-everywhere nil
  65   "Non-nil to offer completions in comments and strings."
  66   :type 'boolean)
  67
  68 (defcustom company-dabbrev-code-ignore-case nil
  69   "Non-nil to ignore case when collecting completion candidates."
  70   :type 'boolean)
  71
  72 (defun company-dabbrev-code--make-regexp (prefix)
  73   (concat "\\_<" (if (equal prefix "")
  74                      "\\([a-zA-Z]\\|\\s_\\)"
  75                    (regexp-quote prefix))
  76           "\\(\\sw\\|\\s_\\)*\\_>"))
  77
  78 ;;;###autoload
  79 (defun company-dabbrev-code (command &optional arg &rest ignored)
  80   "dabbrev-like `company-mode' backend for code.
  81 The backend looks for all symbols in the current buffer that aren't in
  82 comments or strings."
  83   (interactive (list 'interactive))
  84   (cl-case command
  85     (interactive (company-begin-backend 'company-dabbrev-code))
  86     (prefix (and (or (eq t company-dabbrev-code-modes)
  87                      (apply #'derived-mode-p company-dabbrev-code-modes))
  88                  (or company-dabbrev-code-everywhere
  89                      (not (company-in-string-or-comment)))
  90                  (or (company-grab-symbol) 'stop)))
  91     (candidates (let ((case-fold-search company-dabbrev-code-ignore-case))
  92                   (company-dabbrev--search
  93                    (company-dabbrev-code--make-regexp arg)
  94                    company-dabbrev-code-time-limit
  95                    (pcase company-dabbrev-code-other-buffers
  96                      (`t (list major-mode))
  97                      (`code company-dabbrev-code-modes)
  98                      (`all `all))
  99                    t)))
 100     (ignore-case company-dabbrev-code-ignore-case)
 101     (duplicates t)))
 102
 103 (provide 'company-dabbrev-code)
 104 ;;; company-dabbrev-code.el ends here