--- /dev/null
+;;; diff-hl-dired.el --- Highlight changed files in Dired -*- lexical-binding: t -*-
+
+;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
+
+;; 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:
+
+;; To enable in all Dired buffers, add this to your init file:
+;;
+;; (add-hook 'dired-mode-hook 'diff-hl-dired-mode)
+
+;;; Code:
+
+(require 'diff-hl)
+
+;;;###autoload
+(define-minor-mode diff-hl-dired-mode
+ "Toggle VC diff highlighting on the side of a Dired window."
+ :lighter ""
+ (if diff-hl-dired-mode
+ (progn
+ (diff-hl-maybe-define-bitmaps)
+ (set (make-local-variable 'diff-hl-dired-process-buffer) nil)
+ (add-hook 'dired-after-readin-hook 'diff-hl-dired-update nil t))
+ (remove-hook 'dired-after-readin-hook 'diff-hl-dired-update t)
+ (diff-hl-dired-clear)))
+
+(defvar diff-hl-dired-process-buffer nil)
+
+(defun diff-hl-dired-update ()
+ "Highlight the Dired buffer."
+ (let ((backend (ignore-errors (vc-responsible-backend default-directory)))
+ (def-dir default-directory)
+ (buffer (current-buffer))
+ dirs-alist files-alist)
+ (when backend
+ (diff-hl-dired-clear)
+ (if (buffer-live-p diff-hl-dired-process-buffer)
+ (let ((proc (get-buffer-process diff-hl-dired-process-buffer)))
+ (when proc (kill-process proc)))
+ (setq diff-hl-dired-process-buffer
+ (generate-new-buffer " *diff-hl-dired* tmp status")))
+ (with-current-buffer diff-hl-dired-process-buffer
+ (setq default-directory (expand-file-name def-dir))
+ (erase-buffer)
+ (vc-call-backend
+ backend 'dir-status def-dir
+ (lambda (entries &optional more-to-come)
+ (with-current-buffer buffer
+ (dolist (entry entries)
+ (cl-destructuring-bind (file state &rest) entry
+ (let ((type (plist-get
+ '(edited change added insert removed delete
+ unregistered unknown)
+ state)))
+ (if (string-match "\\`\\([^/]+\\)/" file)
+ (let* ((dir (match-string 1 file))
+ (value (cdr (assoc dir dirs-alist))))
+ (unless (eq value type)
+ (if (null value)
+ (push (cons dir type) dirs-alist)
+ (setcdr (assoc dir dirs-alist) 'change))))
+ (push (cons file type) files-alist)))))
+ ;; Process's finished, time to use the results.
+ (unless (get-buffer-process diff-hl-dired-process-buffer)
+ (diff-hl-dired-highlight-items (append dirs-alist
+ files-alist)))))
+ )))))
+
+(defun diff-hl-dired-highlight-items (alist)
+ "Highlight ALIST containing (FILE . TYPE) elements."
+ (dolist (pair alist)
+ (let ((file (car pair))
+ (type (cdr pair)))
+ (save-excursion
+ (goto-char (point-min))
+ (when (and type (dired-goto-file-1
+ file (expand-file-name file) nil))
+ (let* ((diff-hl-fringe-bmp-function 'diff-hl-fringe-bmp-from-type)
+ (o (diff-hl-add-highlighting type 'single)))
+ (overlay-put o 'modification-hooks '(diff-hl-overlay-modified))
+ ))))))
+
+(defalias 'diff-hl-dired-clear 'diff-hl-remove-overlays)
+
+(provide 'diff-hl-dired)
+
+;;; diff-hl-dired.el ends here