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

   1 ;;; company-files.el --- a company-mode completion back-end for file names
   2 ;;
   3 ;; Copyright (C) 2009 Nikolaj Schumacher
   4 ;;
   5 ;; This file is part of company 0.4.
   6 ;;
   7 ;; This program is free software; you can redistribute it and/or
   8 ;; modify it under the terms of the GNU General Public License
   9 ;; as published by the Free Software Foundation; either version 2
  10 ;; of the License, or (at your option) any later version.
  11 ;;
  12 ;; This program is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16 ;;
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 (require 'company)
  21 (eval-when-compile (require 'cl))
  22
  23 (defun company-files-directory-files (dir prefix)
  24   (ignore-errors
  25     (if (equal prefix "")
  26         (directory-files dir nil "\\`[^.]\\|\\`.[^.]")
  27       (file-name-all-completions prefix dir))))
  28
  29 (defun company-files-grab-existing-name ()
  30   ;; Grab file names with spaces, only when they include quotes.
  31   (let ((file (or (company-grab-line "\"\\(~?/[^\"\n]*\\)" 1)
  32                   (company-grab-line "\'\\(~?/[^\'\n]*\\)" 1)
  33                   (company-grab-line "[ \t\n]\\(~?/[^ \t\n]*\\)" 1)))
  34         dir)
  35     (and file
  36          (setq dir (file-name-directory file))
  37          (file-exists-p dir)
  38          (file-name-all-completions (file-name-nondirectory file) dir)
  39          file)))
  40
  41 (defvar company-files-completion-cache nil)
  42
  43 (defun company-files-complete (prefix)
  44   (let* ((dir (file-name-directory prefix))
  45          (file (file-name-nondirectory prefix))
  46          candidates)
  47     (setq company-files-completion-cache nil)
  48     (unless (equal dir (car company-files-completion-cache))
  49       (dolist (file (company-files-directory-files dir file))
  50         (setq file (concat dir file))
  51         (push file candidates)
  52         (when (file-directory-p file)
  53           ;; Add one level of children.
  54           (dolist (child (company-files-directory-files file ""))
  55             (push (concat file child) candidates))))
  56       (setq company-files-completion-cache (cons dir (nreverse candidates))))
  57     (cdr company-files-completion-cache)))
  58
  59 ;;;###autoload
  60 (defun company-files (command &optional arg &rest ignored)
  61   "a `company-mode' completion back-end existing file names."
  62   (interactive (list 'interactive))
  63   (case command
  64     ('interactive (company-begin-backend 'company-files))
  65     ('prefix (company-files-grab-existing-name))
  66     ('candidates (company-files-complete arg))
  67     ('location (cons (dired-noselect
  68                       (file-name-directory (directory-file-name arg))) 1))
  69     ('sorted t)
  70     ('no-cache t)))
  71
  72 (provide 'company-files)
  73 ;;; company-files.el ends here