my-emacs-d/elpa/company-0.8.12/company-files.el

106 lines
3.9 KiB
EmacsLisp

;;; company-files.el --- company-mode completion back-end for file paths
;; Copyright (C) 2009-2011, 2014 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'company)
(require 'cl-lib)
(defun company-files--directory-files (dir prefix)
(ignore-errors
(if (equal prefix "")
(directory-files dir nil "\\`[^.]\\|\\`.[^.]")
(file-name-all-completions prefix dir))))
(defvar company-files--regexps
(let* ((root (if (eq system-type 'windows-nt)
"[a-zA-Z]:/"
"/"))
(begin (concat "\\(?:\\.\\{1,2\\}/\\|~/\\|" root "\\)")))
(list (concat "\"\\(" begin "[^\"\n]*\\)")
(concat "\'\\(" begin "[^\'\n]*\\)")
(concat "\\(?:[ \t]\\|^\\)\\(" begin "[^ \t\n]*\\)"))))
(defun company-files--grab-existing-name ()
;; Grab the file name.
;; When surrounded with quotes, it can include spaces.
(let (file dir)
(and (cl-dolist (regexp company-files--regexps)
(when (setq file (company-grab-line regexp 1))
(cl-return file)))
(setq dir (file-name-directory file))
(not (string-match "//" dir))
(file-exists-p dir)
(file-name-all-completions (file-name-nondirectory file) dir)
file)))
(defvar company-files--completion-cache nil)
(defun company-files--complete (prefix)
(let* ((dir (file-name-directory prefix))
(key (list (file-name-nondirectory prefix)
(expand-file-name dir)
(nth 5 (file-attributes dir))))
(file (file-name-nondirectory prefix))
(completion-ignore-case read-file-name-completion-ignore-case)
candidates directories)
(unless (company-file--keys-match-p key (car company-files--completion-cache))
(dolist (file (company-files--directory-files dir file))
(setq file (concat dir file))
(push file candidates)
(when (file-directory-p file)
(push file directories)))
(dolist (directory (reverse directories))
;; Add one level of children.
(dolist (child (company-files--directory-files directory ""))
(push (concat directory
(unless (eq (aref directory (1- (length directory))) ?/) "/")
child) candidates)))
(setq company-files--completion-cache (cons key (nreverse candidates))))
(all-completions prefix
(cdr company-files--completion-cache))))
(defun company-file--keys-match-p (new old)
(and (equal (cdr old) (cdr new))
(string-prefix-p (car old) (car new))))
;;;###autoload
(defun company-files (command &optional arg &rest ignored)
"`company-mode' completion back-end existing file names.
Completions works for proper absolute and relative files paths.
File paths with spaces are only supported inside strings."
(interactive (list 'interactive))
(cl-case command
(interactive (company-begin-backend 'company-files))
(prefix (company-files--grab-existing-name))
(candidates (company-files--complete arg))
(location (cons (dired-noselect
(file-name-directory (directory-file-name arg))) 1))
(sorted t)
(no-cache t)))
(provide 'company-files)
;;; company-files.el ends here