;;; diff-hl-margin.el --- Highlight buffer changes on margins -*- lexical-binding: t -*-
-;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
+;; Copyright (C) 2012-2014 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;;; Commentary:
-;; This is a global mode, it modified `diff-hl-mode' to use the margin
+;; This is a global mode, it modifies `diff-hl-mode' to use the margin
;; instead of the fringe. To toggle, type `M-x diff-hl-margin-mode'.
;;
;; Compared to the default behavior, this makes `diff-hl-mode'
(define-minor-mode diff-hl-margin-mode
"Toggle displaying `diff-hl-mode' highlights on the margin."
:lighter "" :global t
- (let ((width-var (intern (format "%s-margin-width" diff-hl-margin-side))))
- (if diff-hl-margin-mode
- (progn
- (setq diff-hl-margin-old-highlight-function diff-hl-highlight-function
- diff-hl-highlight-function 'diff-hl-highlight-on-margin)
- (set-default width-var 1))
- (setq diff-hl-highlight-function diff-hl-margin-old-highlight-function
- diff-hl-margin-old-highlight-function nil)
- (set-default width-var 0)))
- (dolist (buffer (buffer-list))
- (with-current-buffer buffer
+ (if diff-hl-margin-mode
+ (progn
+ (add-hook 'diff-hl-mode-on-hook 'diff-hl-margin-minor-mode)
+ (add-hook 'diff-hl-mode-off-hook 'diff-hl-margin-minor-mode-off)
+ (add-hook 'diff-hl-dired-mode-on-hook 'diff-hl-margin-minor-mode)
+ (add-hook 'diff-hl-dired-mode-off-hook 'diff-hl-margin-minor-mode-off))
+ (remove-hook 'diff-hl-mode-on-hook 'diff-hl-margin-minor-mode)
+ (remove-hook 'diff-hl-mode-off-hook 'diff-hl-margin-minor-mode-off)
+ (remove-hook 'diff-hl-dired-mode-on-hook 'diff-hl-margin-minor-mode)
+ (remove-hook 'diff-hl-dired-mode-off-hook 'diff-hl-margin-minor-mode-off))
+ (dolist (buf (buffer-list))
+ (with-current-buffer buf
(cond
(diff-hl-mode
+ (diff-hl-margin-minor-mode (if diff-hl-margin-mode 1 -1))
(diff-hl-update))
(diff-hl-dired-mode
- (diff-hl-dired-update)))))
- (walk-windows (lambda (win) (set-window-buffer win (window-buffer win)))))
+ (diff-hl-margin-minor-mode (if diff-hl-margin-mode 1 -1))
+ (diff-hl-dired-update))))))
+
+(define-minor-mode diff-hl-margin-minor-mode
+ "Toggle displaying `diff-hl-mode' highlights on the margin locally.
+You probably shouldn't use this function directly."
+ :lighter ""
+ (let ((width-var (intern (format "%s-margin-width" diff-hl-margin-side))))
+ (if diff-hl-margin-minor-mode
+ (progn
+ (set (make-local-variable 'diff-hl-margin-old-highlight-function)
+ diff-hl-highlight-function)
+ (set (make-local-variable 'diff-hl-highlight-function)
+ 'diff-hl-highlight-on-margin)
+ (set width-var 1))
+ (setq diff-hl-highlight-function diff-hl-margin-old-highlight-function
+ diff-hl-margin-old-highlight-function nil)
+ (set width-var 0)))
+ (dolist (win (get-buffer-window-list))
+ (set-window-buffer win (current-buffer))))
+
+(defun diff-hl-margin-minor-mode-off ()
+ (diff-hl-margin-minor-mode -1))
(defvar diff-hl-margin-spec-cache
(cl-loop for (type . char) in '((insert . "+") (delete . "-")