code.delx.au - gnu-emacs-elpa/blob - packages/company-0.5/company-files.el

   1 ;;; company-files.el --- a company-mode completion back-end for file names
   2
   3 ;; Copyright (C) 2009, 2010 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 ;;; Code:
  23
  24 (require 'company)
  25 (eval-when-compile (require 'cl))
  26
  27 (defun company-files-directory-files (dir prefix)
  28   (ignore-errors
  29     (if (equal prefix "")
  30         (directory-files dir nil "\\`[^.]\\|\\`.[^.]")
  31       (file-name-all-completions prefix dir))))
  32
  33 (defvar company-files-regexps
  34   (let ((begin (if (eq system-type 'windows-nt)
  35                    "[a-z][A-Z]\\"
  36                  "~?/")))
  37     (list (concat "\"\\(" begin "[^\"\n]*\\)")
  38           (concat "\'\\(" begin "[^\'\n]*\\)")
  39           (concat "\\(?:[ \t]\\|^\\)\\(" begin "[^ \t\n]*\\)"))))
  40
  41 (defun company-files-grab-existing-name ()
  42   ;; Grab file names with spaces, only when they include quotes.
  43   (let (file dir)
  44     (and (dolist (regexp company-files-regexps)
  45            (when (setq file (company-grab-line regexp 1))
  46              (return file)))
  47          (setq dir (file-name-directory file))
  48          (not (string-match "//" dir))
  49          (file-exists-p dir)
  50          (file-name-all-completions (file-name-nondirectory file) dir)
  51          file)))
  52
  53 (defvar company-files-completion-cache nil)
  54
  55 (defun company-files-complete (prefix)
  56   (let* ((dir (file-name-directory prefix))
  57          (file (file-name-nondirectory prefix))
  58          candidates)
  59     (unless (equal dir (car company-files-completion-cache))
  60       (dolist (file (company-files-directory-files dir file))
  61         (setq file (concat dir file))
  62         (push file candidates)
  63         (when (file-directory-p file)
  64           ;; Add one level of children.
  65           (dolist (child (company-files-directory-files file ""))
  66             (push (concat file child) candidates))))
  67       (setq company-files-completion-cache (cons dir (nreverse candidates))))
  68     (cdr company-files-completion-cache)))
  69
  70 ;;;###autoload
  71 (defun company-files (command &optional arg &rest ignored)
  72   "a `company-mode' completion back-end existing file names."
  73   (interactive (list 'interactive))
  74   (case command
  75     ('interactive (company-begin-backend 'company-files))
  76     ('prefix (company-files-grab-existing-name))
  77     ('candidates (company-files-complete arg))
  78     ('location (cons (dired-noselect
  79                       (file-name-directory (directory-file-name arg))) 1))
  80     ('sorted t)
  81     ('no-cache t)))
  82
  83 (provide 'company-files)
  84 ;;; company-files.el ends here