1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
;; Copyright (C) 2015-2021 Free Software Foundation, Inc. -*- lexical-binding: t -*-
;; Author: Jonathan Hayase <PythonNut@gmail.com>
;; URL: https://github.com/dgutov/diff-hl
;; 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This mode enables diffing on-the-fly (i.e. without saving the buffer first)
;; Toggle in all buffers with M-x diff-hl-flydiff-mode
;;; Code:
(require 'diff-hl)
(require 'diff)
(defgroup diff-hl-flydiff nil
"Highlight changes on the fly"
:group 'diff-hl)
(defcustom diff-hl-flydiff-delay 0.3
"The idle delay in seconds before highlighting is updated."
:type 'number)
(defvar diff-hl-flydiff-modified-tick nil)
(defvar diff-hl-flydiff-timer nil)
(make-variable-buffer-local 'diff-hl-flydiff-modified-tick)
(defun diff-hl-flydiff-changes-buffer (file &optional backend)
(setq diff-hl-flydiff-modified-tick (buffer-chars-modified-tick))
(diff-hl-diff-buffer-with-reference file " *diff-hl-diff*" backend))
(defun diff-hl-flydiff-update ()
(unless (or
(not diff-hl-mode)
(eq diff-hl-flydiff-modified-tick (buffer-chars-modified-tick))
(not buffer-file-name)
(file-remote-p default-directory)
(not (file-exists-p buffer-file-name)))
(diff-hl-update)))
(defun diff-hl-flydiff/modified-p (_state)
(buffer-modified-p))
;;;###autoload
(define-minor-mode diff-hl-flydiff-mode
"Perform highlighting on-the-fly.
This is a global minor mode. It alters how `diff-hl-mode' works."
:lighter "" :global t
(and diff-hl-flydiff-timer
(cancel-timer diff-hl-flydiff-timer))
(if diff-hl-flydiff-mode
(progn
(advice-add 'diff-hl-overlay-modified :override #'ignore)
(advice-add 'diff-hl-modified-p :before-until
#'diff-hl-flydiff/modified-p)
(advice-add 'diff-hl-changes-buffer :override
#'diff-hl-flydiff-changes-buffer)
(setq diff-hl-flydiff-timer
(run-with-idle-timer diff-hl-flydiff-delay t #'diff-hl-flydiff-update)))
(advice-remove 'diff-hl-overlay-modified #'ignore)
(advice-remove 'diff-hl-modified-p #'diff-hl-flydiff/modified-p)
(advice-remove 'diff-hl-changes-buffer #'diff-hl-flydiff-changes-buffer)))
(provide 'diff-hl-flydiff)
|
