branch: master
commit 8e27affdc198676237715f02d41eda328c31e8fd
Merge: 4abb460 0f3f249
Author: Justin Burkett <jus...@burkett.cc>
Commit: Justin Burkett <jus...@burkett.cc>
Add 'packages/vdiff/' from commit '0f3f249a71beaa7603a3e114dfb621d79f03539a'
git-subtree-dir: packages/vdiff
git-subtree-mainline: 4abb4600a4bd2fef855b42af3c79cf9a0826566c
git-subtree-split: 0f3f249a71beaa7603a3e114dfb621d79f03539a
---
packages/vdiff/.gitignore | 4 +
packages/vdiff/LICENSE | 674 ++++++++++++
packages/vdiff/README.org | 216 ++++
packages/vdiff/img/hydra.png | Bin 0 -> 19666 bytes
packages/vdiff/img/leuven.png | Bin 0 -> 105779 bytes
packages/vdiff/img/leuven3.png | Bin 0 -> 120134 bytes
packages/vdiff/img/wide-screen.png | Bin 0 -> 43685 bytes
packages/vdiff/vdiff.el | 2108 ++++++++++++++++++++++++++++++++++++
8 files changed, 3002 insertions(+)
diff --git a/packages/vdiff/.gitignore b/packages/vdiff/.gitignore
new file mode 100644
index 0000000..82d13b8
--- /dev/null
+++ b/packages/vdiff/.gitignore
@@ -0,0 +1,4 @@
+*.elc
+/vdiff-test.el
+/vdiff-test2.el
+/test*
diff --git a/packages/vdiff/LICENSE b/packages/vdiff/LICENSE
new file mode 100644
index 0000000..9cecc1d
--- /dev/null
+++ b/packages/vdiff/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ {one line to give the program's name and a brief idea of what it does.}
+ Copyright (C) {year} {name of author}
+
+ This program 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.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ {project} Copyright (C) {year} {fullname}
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/packages/vdiff/README.org b/packages/vdiff/README.org
new file mode 100644
index 0000000..1ba7494
--- /dev/null
+++ b/packages/vdiff/README.org
@@ -0,0 +1,216 @@
+[[https://melpa.org/#/vdiff][file:https://melpa.org/packages/vdiff-badge.svg]]
+
+* vdiff
+
+A tool like vimdiff for Emacs
+
+** Table of Contents :TOC:
+ - [[#vdiff][vdiff]]
+ - [[#introduction][Introduction]]
+ - [[#recent-significant-changes][Recent (Significant) Changes]]
+ - [[#screenshot][Screenshot]]
+ - [[#installation-and-usage][Installation and Usage]]
+ - [[#hydra][Hydra]]
+ - [[#further-customization][Further customization]]
+
+** Introduction
+
+ vdiff compares two or three buffers on the basis of the output from the diff
+ tool. The buffers are kept synchronized so that as you move through one of
+ the buffers the top of the active buffer aligns with the corresponding top
of
+ the other buffer(s). This is similar to how ediff works, but in ediff you
use
+ a third "control buffer" to move through the diffed buffers. The key
+ difference is that in vdiff you are meant to actively edit one of the
buffers
+ and the display will update automatically for the other buffer. Similar to
+ ediff, vdiff provides commands to "send" and "receive" hunks from one buffer
+ to the other as well as commands to traverse the diff hunks, which are
useful
+ if you are trying to merge changes. In contrast to ediff, vdiff also
provides
+ folding capabilities to fold sections of the buffers that don't contain
+ changes. This folding occurs automatically. Finally, you are encouraged to
+ bind a key to `vdiff-hydra/body', which will use hydra.el (in ELPA) to
create
+ a convenient transient keymap containing most of the useful vdiff commands.
+
+ This functionality is all inspired by (but not equivalent to) the vimdiff
+ tool from vim.
+
+ Contributions and suggestions are very welcome.
+
+** Recent (Significant) Changes
+ - [2017-05-17] Split =vdiff-magit.el= into
[[https://github.com/justbur/emacs-vdiff-magit][separate repository]].
+ - [2017-02-01] Added magit integration functions in =vdiff-magit.el=.
+ - [2016-07-25] Added three-way diff support. See =vdiff-buffers3= and
=vdiff-files3=.
+
+** Screenshot
+
+*** Basic two file diff with refined hunks
+[[./img/leuven.png]]
+
+*** Three file diff with targets for sending changes
+[[./img/leuven3.png]]
+
+** Installation and Usage
+
+vdiff is available in MELPA, which is the recommended way to install it and
keep
+it up to date. To install it you may do =M-x package-install RET vdiff RET=.
+
+To start a vdiff session, the main entry points are
+
+| Command | Description
|
+|------------------------+-------------------------------------------------------------------|
+| =vdiff-buffers= | Diff two open buffers
|
+| =vdiff-files= | Diff two files
|
+| =vdiff-buffers3= | Diff three open buffers
|
+| =vdiff-files3= | Diff three files
|
+| =vdiff-current-file= | Like =ediff-current-file= (Diff buffer with disk
version of file) |
+| =vdiff-merge-conflict= | Use vdiff to resolve merge conflicts in current
file |
+
+After installing you can bind the commands to your preferred key prefix like
this
+
+#+BEGIN_SRC emacs-lisp
+(require 'vdiff)
+(define-key vdiff-mode-map (kbd "C-c") vdiff-mode-prefix-map)
+#+END_SRC
+
+which will bind most of the commands under the =C-c= prefix when vdiff-mode is
+active. Of course you can pick whatever prefix you prefer. With the =C-c=
prefix
+the commands would be
+
+*** Basics
+
+| Key | Command | Description |
+|---------+-------------------------+------------------------------------|
+| =C-c g= | =vdiff-switch-buffer= | Switch buffers at matching line |
+| =C-c n= | =vdiff-next-hunk= | Move to next hunk in buffer |
+| =C-c p= | =vdiff-previous-hunk= | Move to previous hunk in buffer |
+| =C-c h= | =vdiff-hydra/body= | Enter vdiff-hydra |
+
+*** Viewing and Transmitting Changes Between Buffers
+
+| Key | Command | Description
|
+|---------+------------------------------------+-------------------------------------|
+| =C-c r= | =vdiff-receive-changes= | Receive change from other
buffer |
+| =C-c s= | =vdiff-send-changes= | Send this change(s) to other
buffer |
+| =C-c f= | =vdiff-refine-this-hunk= | Highlight changed words in
hunk |
+| =C-c x= | =vdiff-remove-refinements-in-hunk= | Remove refinement
highlighting |
+| (none) | =vdiff-refine-this-hunk-symbol= | Refine based on symbols
|
+| (none) | =vdiff-refine-this-hunk-word= | Refine based on words
|
+| =C-c F= | =vdiff-refine-all-hunks= | Highlight changed words
|
+| (none) | =vdiff-refine-all-hunks-symbol= | Refine all based on symbols
|
+| (none) | =vdiff-refine-all-hunks-word= | Refine all based on words
|
+
+*** Folds
+
+| Key | Command | Description
|
+|---------+------------------------------------+-------------------------------------|
+| =C-c N= | =vdiff-next-fold= | Move to next fold in buffer
|
+| =C-c P= | =vdiff-previous-fold= | Move to previous fold in
buffer |
+| =C-c c= | =vdiff-close-fold= | Close fold at point or in
region |
+| =C-c C= | =vdiff-close-all-folds= | Close all folds in buffer
|
+| =C-c t= | =vdiff-close-other-folds= | Close all other folds in
buffer |
+| =C-c o= | =vdiff-open-fold= | Open fold at point or in
region |
+| =C-c O= | =vdiff-open-all-folds= | Open all folds in buffer
|
+
+*** Ignoring case and whitespace
+
+| Key | Command | Description |
+|-----------+---------------------------+-------------------------|
+| =C-c i c= | =vdiff-toggle-case= | Toggle ignoring of case |
+| =C-c i w= | =vdiff-toggle-whitespace= | Toggle ignoring of case |
+
+*** Saving, Updating and Exiting
+
+| Key | Command | Description |
+|---------+-------------------------+------------------------------|
+| =C-c w= | =vdiff-save-buffers= | Save both buffers |
+| =C-c u= | =vdiff-refresh= | Force diff refresh |
+| (none) | =vdiff-restore-windows= | Restore window configuration |
+| =C-c q= | =vdiff-quit= | Quit vdiff |
+
+Evil-mode users might prefer something like the following to use a comma as a
+prefix in normal state.
+
+#+BEGIN_SRC emacs-lisp
+(require 'vdiff)
+(require 'evil)
+(evil-define-key 'normal vdiff-mode-map "," vdiff-mode-prefix-map)
+#+END_SRC
+
+To match vimdiff bindings some more work is required. The way the =d= command
+for evil is set up makes it difficult to bind =do= and =dp= as they exist in
+vimdiff. Here is a sample set of bindings that avoids this problem (thanks to
+@edkolev for these).
+
+#+BEGIN_SRC emacs-lisp
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "]c" 'vdiff-next-hunk)
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "[c" 'vdiff-previous-hunk)
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "zc" 'vdiff-close-fold)
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "zM" 'vdiff-close-all-folds)
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "zo" 'vdiff-open-fold)
+ (evil-define-minor-mode-key 'normal 'vdiff-mode "zR" 'vdiff-open-all-folds)
+ (evil-define-minor-mode-key 'motion 'vdiff-mode "go" 'vdiff-receive-changes)
+ (evil-define-minor-mode-key 'motion 'vdiff-mode "gp" 'vdiff-send-changes)
+#+END_SRC
+
+** Hydra
+
+Using the [[https://github.com/abo-abo/hydra][hydra package]], =vdiff-hydra=
allows quick movement and changes to be
+made in the buffer. By default it lives on the =h= command in the prefix
+map. Bind =vdiff-hydra/body= directly to customize this key binding.
+
+[[file:img/hydra.png]]
+
+
+** Further customization
+
+The current customization options and there defaults are
+
+#+BEGIN_SRC emacs-lisp
+ ;; Whether to lock scrolling by default when starting vdiff
+ (setq vdiff-lock-scrolling t)
+
+ ;; external diff program/command to use
+ (setq vdiff-diff-program "diff")
+
+ ;; Extra arguments to pass to diff. If this is set wrong, you may
+ ;; break vdiff.
+ (setq vdiff-diff-program-args "")
+
+ ;; Unchanged lines to leave unfolded around a fold
+ (setq vdiff-fold-padding 6)
+
+ ;; Minimum number of lines to fold
+ (setq vdiff-min-fold-size 4)
+
+ ;; If non-nil, allow closing new folds around point after updates.
+ (setq vdiff-may-close-fold-on-point t)
+
+ ;; Function that returns the string printed for a closed fold. The arguments
+ ;; passed are the number of lines folded, the text on the first line, and the
+ ;; width of the buffer.
+ (setq vdiff-fold-string-function 'vdiff-fold-string-default)
+
+ ;; Default syntax table class code to use for identifying "words" in
+ ;; `vdiff-refine-this-change'. Some useful options are
+ ;;
+ ;; "w" (default) words
+ ;; "w_" symbols (words plus symbol constituents)
+ ;;
+ ;; For more information see
+ ;;
https://www.gnu.org/software/emacs/manual/html_node/elisp/Syntax-Class-Table.html
+ (setq vdiff-default-refinement-syntax-code "w")
+
+ ;; If non-nil, automatically refine all hunks.
+ (setq vdiff-auto-refine nil)
+
+ ;; How to represent subtractions (i.e., deleted lines). The
+ ;; default is full which means add the same number of (fake) lines
+ ;; as those that were removed. The choice single means add only one
+ ;; fake line. The choice fringe means don't add lines but do
+ ;; indicate the subtraction location in the fringe.
+ (setq vdiff-subtraction-style 'full)
+
+ ;; Character to use for filling subtraction lines. See also
+ ;; `vdiff-subtraction-style'.
+ (setq vdiff-subtraction-fill-char ?-)
+#+END_SRC
+
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diff --git a/packages/vdiff/img/leuven3.png b/packages/vdiff/img/leuven3.png
new file mode 100644
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diff --git a/packages/vdiff/img/wide-screen.png
b/packages/vdiff/img/wide-screen.png
new file mode 100644
index 0000000..67e9125
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diff --git a/packages/vdiff/vdiff.el b/packages/vdiff/vdiff.el
new file mode 100644
index 0000000..c17023a
--- /dev/null
+++ b/packages/vdiff/vdiff.el
@@ -0,0 +1,2108 @@
+;;; vdiff.el --- A diff tool similar to vimdiff -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2017 Free Software Foundation, Inc.
+
+;; Author: Justin Burkett <jus...@burkett.cc>
+;; Maintainer: Justin Burkett <jus...@burkett.cc>
+;; URL: https://github.com/justbur/emacs-vdiff
+;; Version: 0.2
+;; Keywords: diff
+;; Package-Requires: ((emacs "24.4") (hydra "0.13.0"))
+
+;; This program 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.
+
+;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; News:
+
+;; Version 0.2
+;; * First ELPA Release
+
+;;; Commentary:
+
+;; A tool like vimdiff for Emacs
+
+;; vdiff compares two or three buffers on the basis of the output from the diff
+;; tool. The buffers are kept synchronized so that as you move through one of
+;; the buffers the top of the active buffer aligns with the corresponding top
of
+;; the other buffer(s). This is similar to how ediff works, but in ediff you
use
+;; a third "control buffer" to move through the diffed buffers. The key
+;; difference is that in vdiff you are meant to actively edit one of the
buffers
+;; and the display will update automatically for the other buffer. Similar to
+;; ediff, vdiff provides commands to "send" and "receive" hunks from one buffer
+;; to the other as well as commands to traverse the diff hunks, which are
useful
+;; if you are trying to merge changes. In contrast to ediff, vdiff also
provides
+;; folding capabilities to fold sections of the buffers that don't contain
+;; changes. This folding occurs automatically. Finally, you are encouraged to
+;; bind a key to `vdiff-hydra/body', which will use hydra.el (in ELPA) to
create
+;; a convenient transient keymap containing most of the useful vdiff commands.
+
+;; This functionality is all inspired by (but not equivalent to) the vimdiff
+;; tool from vim.
+
+;; See https://github.com/justbur/emacs-vdiff for more information
+
+;;; Code:
+
+(require 'cl-lib)
+(eval-when-compile (require 'subr-x))
+(require 'diff-mode)
+(require 'hydra)
+(require 'smerge-mode)
+
+(defvar vdiff-mode)
+(defvar vdiff-3way-mode)
+
+(defgroup vdiff nil
+ "Diff tool that is like vimdiff"
+ :tag "Vdiff"
+ :group 'tools)
+
+(defcustom vdiff-lock-scrolling t
+ "Whether to lock scrolling by default when starting
+`vdiff-mode'."
+ :type 'boolean)
+
+(defcustom vdiff-diff-program "diff"
+ "diff program to use."
+ :type 'string)
+
+(defcustom vdiff-diff3-program "diff3"
+ "diff3 program to use."
+ :type 'string)
+
+(defcustom vdiff-diff-extra-args ""
+ "Extra arguments to pass to diff. If this is set wrong, you may
+break vdiff. It is empty by default."
+ :type 'string)
+
+(defcustom vdiff-fold-padding 6
+ "Unchanged lines to leave unfolded around a fold"
+ :type 'integer)
+
+(defcustom vdiff-min-fold-size 4
+ "Minimum number of lines to fold"
+ :type 'integer)
+
+(defcustom vdiff-may-close-fold-on-point t
+ "If non-nil, allow closing new folds around point after updates."
+ :type 'boolean)
+
+(defcustom vdiff-fold-string-function #'vdiff-fold-string-default
+ "Function that returns the string printed for a closed
+fold. The arguments passed are the number of lines folded, the
+text on the first line, and the width of the buffer."
+ :type 'function)
+
+(defcustom vdiff-default-refinement-syntax-code "w"
+ "Default syntax table class code to use for identifying
+\"words\" in \`vdiff-refine-this-hunk'. Some useful options are
+
+\"w\" (default) words
+\"w_\" symbols \(words plus symbol constituents\)
+
+For more information see
+https://www.gnu.org/software/emacs/manual/html_node/elisp/Syntax-Class-Table.html";
+ :type 'string)
+
+(defcustom vdiff-auto-refine nil
+ "If non-nil, automatically refine all hunks."
+ :type 'boolean)
+
+(defcustom vdiff-subtraction-style 'full
+ "How to represent subtractions (i.e., deleted lines). The
+default is full which means add the same number of (fake) lines
+as those that were removed. The choice single means add only one
+fake line. The choice fringe means don't add lines but do
+indicate the subtraction location in the fringe."
+ :type '(radio (const :tag "Add same number of fake lines" full)
+ (const :tag "Add single line" single)
+ (const :tag "Add no lines but use fringe" fringe)))
+
+(defcustom vdiff-subtraction-fill-char ?-
+ "Character to use for filling subtraction lines. See also
+`vdiff-subtraction-style'."
+ :type 'integer)
+
+(defcustom vdiff-use-ancestor-as-merge-buffer nil
+ "When in a merge conflict file and text from the ancestor file
+is included, `vdiff-merge-conflict' will use the ancestor file as
+the merge buffer (or target buffer) that will be saved when the
+merge is finished. The default is to show the original file with
+conflicts as the merge buffer."
+ :type 'boolean)
+
+(defface vdiff-addition-face
+ '((t :inherit diff-added))
+ "Face for additions")
+
+(defface vdiff-change-face
+ '((t :inherit diff-changed))
+ "Face for changes")
+
+(defface vdiff-closed-fold-face
+ '((t :inherit region))
+ "Face for closed folds")
+
+(defface vdiff-open-fold-face
+ '((t))
+ "Face for open folds")
+
+(defface vdiff-subtraction-face
+ '((t :inherit diff-removed))
+ "Face for subtractions")
+
+(defface vdiff-subtraction-fringe-face
+ '((t :inherit vdiff-subtraction-face))
+ "Face for subtraction fringe indicators")
+
+(defface vdiff-refine-changed
+ '((t :inherit diff-refine-changed))
+ "Face for word changes within a change hunk")
+
+(defface vdiff-refine-added
+ '((t :inherit diff-refine-added))
+ "Face for word changes within an addition hunk")
+
+(defface vdiff-target-face
+ '((t :inverse-video t :inherit warning))
+ "Face for selecting hunk targets.")
+
+(defvar vdiff--force-sync-commands '(next-line
+ previous-line
+ beginning-of-buffer
+ end-of-buffer)
+ "Commands that trigger sync in other buffer. There should not
+be a need to include commands that scroll the buffer here,
+because those are handled differently.")
+
+(defvar vdiff--diff-code-regexp
+ "^\\([0-9]+\\),?\\([0-9]+\\)?\\([adc]\\)\\([0-9]+\\),?\\([0-9]+\\)?")
+(defvar vdiff--diff3-code-regexp
+ "^\\([1-3]\\):\\([0-9]+\\),?\\([0-9]+\\)?\\([adc]\\)")
+(defvar vdiff--inhibit-window-switch nil)
+(defvar vdiff--inhibit-diff-update nil)
+(defvar vdiff--in-scroll-hook nil)
+;; (defvar vdiff--in-post-command-hook nil)
+(defvar vdiff--setting-vscroll nil)
+(defvar vdiff--after-change-timer nil)
+(defvar vdiff--after-change-refresh-delay 1)
+(defvar vdiff--new-command nil)
+(defvar vdiff--last-command nil)
+(defvar vdiff--case-options
+ '(("Don't ignore case" . "")
+ ("Ignore case (-i)" . "-i")))
+(defvar vdiff--whitespace-options
+ '(("Don't ignore whitespace" . "")
+ ("Ignore all whitespace (-w)" . "-w")
+ ("Ignore space changes (-b)" . "-b")
+ ("Ignore blank lines (-B)" . "-B")))
+
+;; Sessions
+(defvar vdiff--temp-session nil
+ "Temporarily stores new vdiff session globally.")
+(defvar-local vdiff--session nil
+ "Holds reference to local vdiff session in each vdiff buffer.")
+(cl-defstruct vdiff-session
+ ;; buffers
+ buffers
+ process-buffer
+ word-diff-output-buffer
+ ;; data
+ diff-data
+ line-maps
+ folds
+ all-folds-open
+ diff-stale
+ ;; other
+ window-config
+ case-args
+ whitespace-args
+ ;; Quit hooks
+ on-quit
+ prior-window-config
+ kill-buffers-on-quit)
+
+
+;; * Utilities
+
+(defun vdiff--maybe-int (str)
+ "Return an int>=0 from STR."
+ (let ((num (and str (string-to-number str))))
+ (when (and (numberp num)
+ (>= num 0))
+ num)))
+
+(defun vdiff--non-nil-list (&rest args)
+ "Make ARGS into list and remove nils."
+ (delq nil (apply #'list args)))
+
+(defun vdiff--buffer-a-p ()
+ (when (and
+ vdiff--session
+ (eq (current-buffer)
+ (car (vdiff-session-buffers vdiff--session))))
+ (current-buffer)))
+
+(defun vdiff--buffer-b-p ()
+ (when (and
+ vdiff--session
+ (eq (current-buffer)
+ (cadr (vdiff-session-buffers vdiff--session))))
+ (current-buffer)))
+
+(defun vdiff--buffer-c-p ()
+ (when (and
+ vdiff--session
+ (eq (current-buffer)
+ (nth 2 (vdiff-session-buffers vdiff--session))))
+ (current-buffer)))
+
+(defun vdiff--buffer-p ()
+ "Non-nil if in any vdiff buffer"
+ (cond ((vdiff--buffer-a-p) 'a)
+ ((vdiff--buffer-b-p) 'b)
+ ((vdiff--buffer-c-p) 'c)))
+
+(defun vdiff--unselected-buffers ()
+ (cl-remove-if
+ (lambda (buf) (or (eq buf (current-buffer))
+ (not (buffer-live-p buf))))
+ (vdiff-session-buffers vdiff--session)))
+
+(defun vdiff--unselected-windows ()
+ (mapcar (lambda (buf) (get-buffer-window buf 0))
+ (vdiff--unselected-buffers)))
+
+(defun vdiff--all-windows ()
+ (remq nil
+ (mapcar (lambda (buf) (get-buffer-window buf 0))
+ (vdiff-session-buffers vdiff--session))))
+
+(defun vdiff--all-overlays (ovr)
+ (overlay-get ovr 'vdiff-hunk-overlays))
+
+(defun vdiff--other-overlays (ovr)
+ (remq ovr (vdiff--all-overlays ovr)))
+
+(defun vdiff--overlay-marker (ovr)
+ (let ((current (eq (current-buffer) (overlay-buffer ovr))))
+ (propertize
+ (format "%s%s\n"
+ (1+
+ (cl-position
+ (overlay-buffer ovr)
+ (vdiff-session-buffers vdiff--session)))
+ (if current " (to all) " ""))
+ 'face 'vdiff-target-face)))
+
+(defun vdiff--add-overlay-marker (ovr)
+ (overlay-put ovr 'before-string
+ (concat (vdiff--overlay-marker ovr)
+ (overlay-get ovr 'before-string))))
+
+(defun vdiff--remove-overlay-marker (ovr)
+ (overlay-put ovr 'before-string
+ (substring
+ (overlay-get ovr 'before-string)
+ (length (vdiff--overlay-marker ovr)))))
+
+(defun vdiff--read-3way-target (ovr &optional just-one)
+ "Read a target overlay when sending or receiving a hunk from
+one buffer to another. Only applies in 3-way diffs."
+ (when vdiff-3way-mode
+ (let* ((all-ovrs (vdiff--all-overlays ovr))
+ (other-ovrs (remq ovr all-ovrs))
+ (this-idx (cl-position ovr all-ovrs))
+ (marked-ovrs (if just-one other-ovrs all-ovrs))
+ target)
+ (unwind-protect
+ (progn
+ (mapc #'vdiff--add-overlay-marker marked-ovrs)
+ (setq target (1- (string-to-number
+ (char-to-string
+ (read-char "Select target: ")))))
+ (cond ((or (not (member target (list 0 1 2)))
+ (and just-one (= target this-idx)))
+ (user-error "Invalid target"))
+ ((= target this-idx)
+ (message "all others %s %s" target this-idx)
+ other-ovrs)
+ (t
+ (message "just %s" (nth target all-ovrs))
+ (list (nth target all-ovrs)))))
+ (mapc #'vdiff--remove-overlay-marker marked-ovrs)))))
+
+(defun vdiff--target-overlays (this-ovr &optional just-one)
+ (when (and (overlayp this-ovr)
+ (overlay-get this-ovr 'vdiff))
+ (let ((3way-target (vdiff--read-3way-target this-ovr just-one))
+ (other-ovrs (vdiff--other-overlays this-ovr)))
+ (cond ((and vdiff-3way-mode
+ 3way-target)
+ (cl-remove-if
+ (lambda (ovr)
+ (or (eq ovr this-ovr)
+ (null (member ovr 3way-target))))
+ other-ovrs))
+ (vdiff-3way-mode
+ (user-error "vdiff: No target overlay"))
+ (t
+ (remq this-ovr other-ovrs))))))
+
+(defun vdiff--move-to-line (n)
+ (goto-char (point-min))
+ (forward-line (1- n)))
+
+(defun vdiff--overlay-at-pos (&optional pos)
+ "Return first vdiff overlay found at POS which defaults to
+point."
+ (let ((pos (or pos (point))))
+ (catch 'yes
+ (dolist (ovr (overlays-at pos))
+ (when (overlay-get ovr 'vdiff-type)
+ (throw 'yes ovr))))))
+
+(defun vdiff--hunk-at-point-p ()
+ "Return first vdiff hunk overlay found at point."
+ (let ((ovr (vdiff--overlay-at-pos)))
+ (and (overlayp ovr)
+ (overlay-get ovr 'vdiff-type)
+ (not (eq (overlay-get ovr 'vdiff-type) 'fold)))))
+
+(defun vdiff--fold-at-point-p ()
+ "Return first vdiff fold overlay found at point."
+ (let ((ovr (vdiff--overlay-at-pos)))
+ (and (overlayp ovr)
+ (overlay-get ovr 'vdiff-type)
+ (eq (overlay-get ovr 'vdiff-type) 'fold))))
+
+(defun vdiff--overlays-in-region (beg end)
+ "Return any vdiff overlays found within BEG and END."
+ (let (ovrs)
+ (dolist (ovr (overlays-in beg end))
+ (when (overlay-get ovr 'vdiff-type)
+ (push ovr ovrs)))
+ (nreverse ovrs)))
+
+(defun vdiff--maybe-exit-overlay (&optional up no-fold)
+ "Move point out of any vdiff overlays. Move down unless UP is
+non-nil. Ignore folds if NO-FOLD is non-nil."
+ (let* ((ovr (vdiff--overlay-at-pos))
+ (type (when ovr (overlay-get ovr 'vdiff-type))))
+ (when (and type
+ (or (not no-fold)
+ (not (eq type 'fold))))
+ (goto-char
+ (if up
+ (1- (overlay-start ovr))
+ (1+ (overlay-end ovr)))))))
+
+(defmacro vdiff--with-all-buffers (&rest body)
+ "Execute BODY in all vdiff buffers."
+ `(dolist (buf (vdiff-session-buffers vdiff--session))
+ (when (buffer-live-p buf)
+ (with-current-buffer buf
+ ,@body))))
+
+;; * Toggles
+
+(defun vdiff-toggle-case (command-line-arg)
+ "Toggle ignoring of case in diff command."
+ (interactive
+ (list (cdr-safe
+ (assoc-string
+ (completing-read "Case options: "
+ vdiff--case-options)
+ vdiff--case-options))))
+ (setf (vdiff-session-case-args vdiff--session)
+ command-line-arg)
+ (when vdiff-mode
+ (vdiff-refresh)))
+
+(defun vdiff-toggle-whitespace (command-line-arg)
+ "Toggle ignoring of whitespace in diff command."
+ (interactive
+ (list (cdr-safe
+ (assoc-string
+ (completing-read "Whitespace options: "
+ vdiff--whitespace-options)
+ vdiff--whitespace-options))))
+ (setf (vdiff-session-whitespace-args vdiff--session)
+ command-line-arg)
+ (when vdiff-mode
+ (vdiff-refresh)))
+
+;; * Main overlay refresh routine
+
+(defun vdiff-refresh (&optional post-refresh-function)
+ "Asynchronously refresh diff information.
+
+POST-REFRESH-FUNCTION is called when the process finishes."
+ (interactive)
+ (when (vdiff--buffer-p)
+ (let* ((tmp-a (make-temp-file "vdiff-a-"))
+ (tmp-b (make-temp-file "vdiff-b-"))
+ (tmp-c (when vdiff-3way-mode
+ (make-temp-file "vdiff-c-")))
+ (prgm (if vdiff-3way-mode
+ vdiff-diff3-program
+ vdiff-diff-program))
+ (ses vdiff--session)
+ (cmd (mapconcat
+ #'identity
+ (vdiff--non-nil-list
+ prgm
+ (vdiff-session-whitespace-args ses)
+ (vdiff-session-case-args ses)
+ vdiff-diff-extra-args
+ tmp-a tmp-b tmp-c)
+ " "))
+ (buffers (vdiff-session-buffers ses))
+ (proc-buf (vdiff-session-process-buffer ses))
+ (proc (get-buffer-process proc-buf)))
+ (setq vdiff--last-command cmd)
+ (with-current-buffer (car buffers)
+ (write-region nil nil tmp-a nil 'quietly))
+ (with-current-buffer (cadr buffers)
+ (write-region nil nil tmp-b nil 'quietly))
+ (when vdiff-3way-mode
+ (with-current-buffer (nth 2 buffers)
+ (write-region nil nil tmp-c nil 'quietly)))
+ (when proc
+ (kill-process proc))
+ (with-current-buffer (get-buffer-create proc-buf)
+ (erase-buffer))
+ ;; (setq vdiff--last-command cmd)
+ (setq proc
+ (start-process-shell-command proc-buf proc-buf cmd))
+ (when vdiff-3way-mode
+ (process-put proc 'vdiff-3way t))
+ (process-put proc 'vdiff-session ses)
+ (process-put proc 'vdiff-tmp-a tmp-a)
+ (process-put proc 'vdiff-tmp-b tmp-b)
+ (process-put proc 'vdiff-post-refresh-function post-refresh-function)
+ (when tmp-c
+ (process-put proc 'vdiff-tmp-c tmp-c))
+ (set-process-sentinel proc #'vdiff--diff-refresh-1))))
+
+(defun vdiff--encode-range (insert beg &optional end)
+ "Normalize BEG and END of range. INSERT indicates that this is
+an addition when compared to other vdiff buffers."
+ (let* ((beg (vdiff--maybe-int beg))
+ (end (vdiff--maybe-int end)))
+ (cond ((and end insert)
+ (error "vdiff: multi-line range for a or d code"))
+ (insert
+ (cons (1+ beg) nil))
+ (t
+ (cons beg (or end beg))))))
+
+(defun vdiff--parse-diff (buf)
+ "Parse diff output in BUF and return list of hunks."
+ (let (res)
+ (with-current-buffer buf
+ (goto-char (point-min))
+ (while (re-search-forward vdiff--diff-code-regexp nil t)
+ (let* ((code (match-string 3)))
+ (push
+ (cl-case (string-to-char code)
+ (?a (list (vdiff--encode-range
+ t (match-string 1))
+ (vdiff--encode-range
+ nil (match-string 4) (match-string 5))))
+ (?d (list (vdiff--encode-range
+ nil (match-string 1) (match-string 2))
+ (vdiff--encode-range
+ t (match-string 4))))
+ (?c (list (vdiff--encode-range
+ nil (match-string 1) (match-string 2))
+ (vdiff--encode-range
+ nil (match-string 4) (match-string 5))))
+ (t (error "vdiff: Unexpected code in parse-diff")))
+ res))))
+ (nreverse res)))
+
+(defun vdiff--parse-diff3 (buf)
+ "Parse diff3 output in BUF and return list of hunks."
+ (catch 'final-res
+ (let (res)
+ (with-current-buffer buf
+ (goto-char (point-min))
+ (let (a-el b-el c-el)
+ (while t
+ (cond ((looking-at vdiff--diff3-code-regexp)
+ (let* ((file (string-to-number
+ (match-string-no-properties 1)))
+ (code (match-string-no-properties 4))
+ (range (vdiff--encode-range
+ (string= code "a")
+ (match-string-no-properties 2)
+ (match-string-no-properties 3))))
+ (cl-case file
+ (1 (setq a-el range))
+ (2 (setq b-el range))
+ (3 (setq c-el range)))))
+ ((and a-el
+ (looking-at-p "^===="))
+ (push (list a-el b-el c-el) res)
+ (setq a-el nil)
+ (setq b-el nil)
+ (setq c-el nil))
+ ((eobp)
+ (when (or a-el b-el)
+ (push (list a-el b-el c-el) res))
+ (throw 'final-res (nreverse res))))
+ (forward-line 1)))))))
+
+(defun vdiff--diff-refresh-1 (proc event)
+ "This is the sentinel for `vdiff-refresh'. It does the job of
+parsing the diff output and triggering the overlay updates."
+ (unless vdiff--inhibit-diff-update
+ (let ((parse-func (if (process-get proc 'vdiff-3way)
+ #'vdiff--parse-diff3
+ #'vdiff--parse-diff))
+ (ses (process-get proc 'vdiff-session))
+ (post-function (process-get proc 'vdiff-post-refresh-function))
+ finished)
+ (cond
+ ;; Was getting different exit code conventions depending on the
+ ;; version of diff used
+ ((or (string= "finished\n" event)
+ (string= "exited abnormally with code 1\n" event))
+ (setf (vdiff-session-diff-data ses)
+ (funcall parse-func (process-buffer proc)))
+ (setq finished t))
+ ((string-match-p "exited abnormally with code" event)
+ (setf (vdiff-session-diff-data ses) nil)
+ (setq finished t)
+ (message "vdiff process error: %s" event)))
+ (when finished
+ (vdiff--refresh-overlays ses)
+ (vdiff--refresh-line-maps ses)
+ (let ((vdiff--session ses))
+ (when vdiff-auto-refine
+ (vdiff-refine-all-hunks))
+ (when post-function
+ (funcall post-function)))
+ (delete-file (process-get proc 'vdiff-tmp-a))
+ (delete-file (process-get proc 'vdiff-tmp-b))
+ (when (process-get proc 'vdiff-tmp-c)
+ (delete-file (process-get proc 'vdiff-tmp-c))))
+ (setf (vdiff-session-diff-stale ses) nil))))
+
+(defun vdiff--remove-all-overlays ()
+ "Remove all vdiff overlays in both vdiff buffers."
+ (when (vdiff--buffer-p)
+ (vdiff--with-all-buffers
+ (remove-overlays (point-min) (point-max) 'vdiff t))))
+
+(defun vdiff-save-buffers ()
+ "Save all vdiff buffers."
+ (interactive)
+ (vdiff--with-all-buffers (save-buffer)))
+
+;; * Word diffs
+
+(defun vdiff--overlay-to-words (&optional ovr syntax-code)
+ "Convert OVR to string of \"words\", one per line."
+ (let* ((ovr (or ovr (vdiff--overlay-at-pos)))
+ (word-syn (or syntax-code
+ vdiff-default-refinement-syntax-code))
+ (not-word-syn (concat "^" word-syn))
+ last-word-end buf-syntax ovr-text)
+ (with-current-buffer (overlay-buffer ovr)
+ (setq buf-syntax (syntax-table))
+ (setq ovr-text (buffer-substring-no-properties
+ (overlay-start ovr)
+ (overlay-end ovr))))
+ (with-temp-buffer
+ (set-syntax-table buf-syntax)
+ (insert ovr-text)
+ (goto-char (point-min))
+ (skip-syntax-forward not-word-syn)
+ (delete-region (point-min) (point))
+ (while (not (eobp))
+ (skip-syntax-forward word-syn)
+ (insert "\n")
+ (setq last-word-end (point))
+ (skip-syntax-forward not-word-syn)
+ (delete-region last-word-end (point)))
+ (buffer-string))))
+
+(defun vdiff--diff-words (this-ovr other-ovr &optional syntax-code)
+ "Diff \"words\" between THIS-OVR and OTHER-OVR"
+ (when (and (eq (overlay-get this-ovr 'vdiff-type) 'change)
+ (overlayp other-ovr))
+ (let* ((a-words (vdiff--overlay-to-words this-ovr syntax-code))
+ (b-words (vdiff--overlay-to-words other-ovr syntax-code))
+ (tmp-file-a (make-temp-file "vdiff-word-a-"))
+ (tmp-file-b (make-temp-file "vdiff-word-b-"))
+ (out-buffer (get-buffer-create
+ (vdiff-session-word-diff-output-buffer
+ vdiff--session)))
+ (a-result '())
+ (b-result '()))
+ (write-region a-words nil tmp-file-a nil 'quietly)
+ (write-region b-words nil tmp-file-b nil 'quietly)
+ (with-current-buffer out-buffer (erase-buffer))
+ (let ((exit-code (call-process
+ vdiff-diff-program nil out-buffer nil tmp-file-a
tmp-file-b)))
+ (delete-file tmp-file-a)
+ (delete-file tmp-file-b)
+ (when (= exit-code 1)
+ (with-current-buffer out-buffer
+ (goto-char (point-min))
+ (while (re-search-forward vdiff--diff-code-regexp nil t)
+ (let ((a-change (list (string-to-number (match-string 1))))
+ (b-change (list (string-to-number (match-string 4)))))
+ (forward-line 1)
+ (while (and (not (eobp))
+ (not (looking-at-p vdiff--diff-code-regexp)))
+ (cond ((looking-at-p "^<")
+ (push (buffer-substring-no-properties
+ (+ 2 (point)) (line-end-position))
+ a-change))
+ ((looking-at-p "^>")
+ (push (buffer-substring-no-properties
+ (+ 2 (point)) (line-end-position))
+ b-change)))
+ (forward-line 1))
+ (when (cdr a-change)
+ (push (nreverse a-change) a-result))
+ (when (cdr b-change)
+ (push (nreverse b-change) b-result))))
+ (cons (nreverse a-result) (nreverse b-result))))))))
+
+(defun vdiff-refine-this-hunk (&optional syntax-code ovr)
+ "Highlight word differences in current hunk.
+
+This uses `vdiff-default-refinement-syntax-code' for the
+definition of a \"word\", unless one is provided using
+SYNTAX-CODE."
+ (interactive (list vdiff-default-refinement-syntax-code
+ (vdiff--overlay-at-pos)))
+ (let* ((ovr (or ovr (vdiff--overlay-at-pos)))
+ (target-ovr (car (vdiff--target-overlays ovr)))
+ (word-syn (or syntax-code
+ vdiff-default-refinement-syntax-code))
+ (not-word-syn (concat "^" word-syn))
+ (type (overlay-get ovr 'vdiff-type))
+ (face (if (eq type 'addition)
+ 'vdiff-refine-added
+ 'vdiff-refine-changed))
+ instructions ovr-ins)
+ (if (fboundp 'smerge-refine-regions)
+ (when (and ovr target-ovr)
+ (smerge-refine-regions
+ (with-current-buffer (overlay-buffer ovr)
+ (copy-marker (overlay-start ovr)))
+ (overlay-end ovr)
+ (with-current-buffer (overlay-buffer target-ovr)
+ (copy-marker (overlay-start target-ovr)))
+ (overlay-end target-ovr)
+ `((face . ,face)
+ (vdiff . t)
+ (vdiff-refinement . t))))
+ (when (and ovr
+ target-ovr
+ (consp (setq instructions
+ (vdiff--diff-words ovr target-ovr))))
+ (dolist (curr-ovr (vdiff--all-overlays ovr))
+ (setq ovr-ins (if (eq curr-ovr ovr)
+ (car instructions)
+ (cdr instructions)))
+ (with-current-buffer (overlay-buffer curr-ovr)
+ (save-excursion
+ (let ((current-word-n 1))
+ (goto-char (overlay-start curr-ovr))
+ (skip-syntax-forward not-word-syn)
+ (dolist (ins ovr-ins)
+ (dotimes (_ (- (car ins) current-word-n))
+ (skip-syntax-forward word-syn)
+ (skip-syntax-forward not-word-syn))
+ (setq current-word-n (car ins))
+ (let* ((words (cdr ins))
+ (word-ovr
+ (make-overlay
+ (point)
+ (progn
+ (dotimes (_ (length words))
+ (skip-syntax-forward not-word-syn)
+ (skip-syntax-forward word-syn))
+ (point)))))
+ (cl-incf current-word-n (length words))
+ (overlay-put word-ovr 'vdiff t)
+ (overlay-put word-ovr 'face face)
+ (overlay-put word-ovr 'vdiff-refinement t)
+ (skip-syntax-forward not-word-syn)))))))))))
+
+;; Not working yet
+;; (defun vdiff-refine-this-hunk-whitespace (ovr)
+;; "Highlight whitespace differences in current hunk."
+;; (interactive (list (vdiff--overlay-at-pos)))
+;; (vdiff-refine-this-hunk "-" ovr))
+
+(defun vdiff-refine-this-hunk-symbol (ovr)
+ "Highlight symbol differences in current hunk."
+ (interactive (list (vdiff--overlay-at-pos)))
+ (vdiff-refine-this-hunk "w_" ovr))
+
+(defun vdiff-refine-this-hunk-word (ovr)
+ "Highlight word differences in current hunk."
+ (interactive (list (vdiff--overlay-at-pos)))
+ (vdiff-refine-this-hunk "w" ovr))
+
+(defun vdiff-remove-refinements-in-hunk (ovr)
+ "Remove any refinement overlays in the hunk overlay OVR."
+ (interactive (list (vdiff--overlay-at-pos)))
+ (dolist (chg-ovr (vdiff--all-overlays ovr))
+ (with-current-buffer (overlay-buffer chg-ovr)
+ (dolist (sub-ovr (overlays-in
+ (overlay-start chg-ovr)
+ (overlay-end chg-ovr)))
+ (when (overlay-get sub-ovr 'vdiff-refinement)
+ (delete-overlay sub-ovr))))))
+
+(defun vdiff-refine-all-hunks (&optional syntax-code)
+ "Highlight word differences in all hunks.
+
+This uses `vdiff-default-refinement-syntax-code' for the
+definition of a \"word\", unless one is provided using
+SYNTAX-CODE.
+See `vdiff-default-refinement-syntax-code' to change the definition
+of a \"word\"."
+ (interactive)
+ ;; Doesn't work for diff3 yet
+ (when (vdiff--buffer-p)
+ (dolist (ovr (overlays-in (point-min) (point-max)))
+ (vdiff-refine-this-hunk syntax-code ovr))))
+
+;; Not working yet
+;; (defun vdiff-refine-all-hunks-whitespace ()
+;; "Highlight whitespace differences in all hunks."
+;; (interactive)
+;; (vdiff-refine-all-hunks "-"))
+
+(defun vdiff-refine-all-hunks-symbol ()
+ "Highlight symbol differences in all hunks."
+ (interactive)
+ (vdiff-refine-all-hunks "w_"))
+
+(defun vdiff-refine-all-hunks-word ()
+ "Highlight word differences in all hunks."
+ (interactive)
+ (vdiff-refine-all-hunks "w"))
+
+;; * Bitmaps
+
+;; emacs-nox users don't have this function. There's probably a better solution
+;; here, but this seems to work.
+(unless (fboundp 'define-fringe-bitmap)
+ (defun define-fringe-bitmap (&rest _)
+ nil))
+
+(define-fringe-bitmap
+ 'vdiff--vertical-bar
+ (make-vector (frame-char-height) #b00100000)
+ nil 8 'center)
+
+(define-fringe-bitmap
+ 'vdiff--top-left-angle
+ (vconcat
+ [#b00111111]
+ (make-vector (1- (frame-char-height))
+ #b00100000))
+ nil 8 'bottom)
+
+(define-fringe-bitmap
+ 'vdiff--bottom-left-angle
+ (vconcat
+ (make-vector (1- (frame-char-height))
+ #b00100000)
+ [#b00111111])
+ nil 8 'top)
+
+(define-fringe-bitmap
+ 'vdiff--insertion-arrow
+ [#b00111111
+ #b00011111
+ #b00001111
+ #b00011111
+ #b00111011
+ #b01110001
+ #b11100000
+ #b11000000
+ #b10001111]
+ nil 8 'top)
+
+;; * Add overlays
+
+(defun vdiff--make-subtraction-string (n-lines)
+ "Make string to fill in space for lines missing in a buffer."
+ (let* ((width (- (window-text-width
+ (get-buffer-window (current-buffer) 0)) 2))
+ (win-height (window-height
+ (get-buffer-window (current-buffer) 0)))
+ (max-lines (floor (* 0.7 win-height)))
+ (truncate (> n-lines max-lines))
+ (trunc-n-lines
+ (cond ((eq 'single vdiff-subtraction-style) 1)
+ (truncate max-lines)
+ (t n-lines)))
+ (truncate-prefix-len 2)
+ string truncate-message)
+ (dotimes (_ trunc-n-lines)
+ (push (make-string width vdiff-subtraction-fill-char) string))
+ (when truncate
+ (setq truncate-message (format " +%d lines " (- n-lines trunc-n-lines)))
+ (push (concat (make-string truncate-prefix-len
vdiff-subtraction-fill-char)
+ truncate-message
+ (make-string (- width truncate-prefix-len
+ (length truncate-message))
+ vdiff-subtraction-fill-char))
+ string)
+ (setq string (nreverse string)))
+ (if (eq vdiff-subtraction-style 'fringe)
+ (propertize
+ " "
+ 'display '(left-fringe vdiff--insertion-arrow
+ vdiff-subtraction-fringe-face))
+ (propertize
+ (concat (mapconcat #'identity string "\n") "\n")
+ 'face 'vdiff-subtraction-face))))
+
+(defun vdiff--add-subtraction-overlay (n-lines)
+ (let* ((ovr (make-overlay (point) (1+ (point)))))
+ (overlay-put ovr 'before-string (vdiff--make-subtraction-string n-lines))
+ (overlay-put ovr 'vdiff-type 'subtraction)
+ (overlay-put ovr 'vdiff t)
+ ovr))
+
+(defun vdiff--add-hunk-overlay
+ (n-lines &optional addition n-subtraction-lines)
+ (let ((beg (point))
+ (end (save-excursion
+ (forward-line n-lines)
+ (point))))
+ (let ((ovr (make-overlay beg end))
+ (type (if addition 'addition 'change))
+ (face (if addition 'vdiff-addition-face 'vdiff-change-face)))
+ (overlay-put ovr 'vdiff-type type)
+ (overlay-put ovr 'face face)
+ (overlay-put ovr 'vdiff t)
+ (when (and n-subtraction-lines
+ (> n-subtraction-lines 0))
+ (overlay-put ovr 'after-string
+ (vdiff--make-subtraction-string n-subtraction-lines)))
+ ovr)))
+
+(defun vdiff-fold-string-default (n-lines first-line-text width)
+ "Produces default format line for closed folds. See
+`vdiff-fold-string-function'."
+ (let ((first-line-text (string-trim-left first-line-text))
+ (start (format "+--%d lines: " n-lines))
+ (width (1- width)))
+ (if (> (+ 1 (length first-line-text) (length start)) width)
+ (concat start
+ (substring-no-properties
+ first-line-text 0 (- width (length start)))
+ "\n")
+ (concat start
+ first-line-text
+ (make-string
+ (- width (length start) (length first-line-text))
+ ?-)
+ "\n"))))
+
+(defun vdiff--make-fold (buffer range)
+ (with-current-buffer buffer
+ (let* ((beg-line (car range))
+ (end-line (cdr range))
+ (fold-start (vdiff--pos-at-line-beginning beg-line))
+ (first-line-text
+ (buffer-substring-no-properties
+ fold-start (save-excursion
+ (goto-char fold-start)
+ (line-end-position))))
+ (fold-end
+ (vdiff--pos-at-line-beginning end-line))
+ (ovr (make-overlay fold-start fold-end))
+ (text
+ (propertize (funcall vdiff-fold-string-function
+ (- end-line beg-line)
+ first-line-text
+ (window-width
+ (get-buffer-window buffer 0)))
+ 'face 'vdiff-closed-fold-face)))
+ (overlay-put ovr 'face 'vdiff-open-fold-face)
+ (overlay-put ovr 'vdiff-fold-text text)
+ (overlay-put ovr 'vdiff-type 'fold)
+ (overlay-put ovr 'vdiff t)
+ ovr)))
+
+(defun vdiff--narrow-fold-range (range)
+ (cons (+ vdiff-fold-padding (car range))
+ (1+ (- (cdr range) vdiff-fold-padding))))
+
+(defun vdiff--point-in-fold-p (fold)
+ (and (eq (current-buffer) (overlay-buffer fold))
+ (>= (point) (overlay-start fold))
+ (<= (point) (overlay-end fold))))
+
+(defun vdiff--add-folds (a-buffer b-buffer c-buffer folds)
+ (let ((ses vdiff--session))
+ (dolist (fold folds)
+ (let* ((a-range (vdiff--narrow-fold-range (nth 0 fold)))
+ (b-range (vdiff--narrow-fold-range (nth 1 fold)))
+ (c-range (when c-buffer
+ (vdiff--narrow-fold-range (nth 2 fold))))
+ (fold-sig (list a-range b-range c-range)))
+ (cond
+ ;; ((gethash fold-sig (vdiff-session-folds ses) nil)
+ ;; ;; Restore any overlays on same ranges
+ ;; (let* ((old-folds (gethash fold-sig
+ ;; (vdiff-session-folds ses)))
+ ;; (a-fold (car old-folds))
+ ;; (b-fold (cadr old-folds))
+ ;; (c-fold (nth 2 old-folds))
+ ;; (a-beg (vdiff--pos-at-line-beginning
+ ;; (car a-range) a-buffer))
+ ;; (a-end (vdiff--pos-at-line-beginning
+ ;; (cdr a-range) a-buffer))
+ ;; (b-beg (vdiff--pos-at-line-beginning
+ ;; (car b-range) b-buffer))
+ ;; (b-end (vdiff--pos-at-line-beginning
+ ;; (cdr b-range) b-buffer))
+ ;; c-beg c-end)
+ ;; (move-overlay a-fold a-beg a-end a-buffer)
+ ;; (move-overlay b-fold b-beg b-end b-buffer)
+ ;; (when c-fold
+ ;; (setq c-beg (vdiff--pos-at-line-beginning
+ ;; (car c-range) c-buffer))
+ ;; (setq c-end (vdiff--pos-at-line-beginning
+ ;; (cdr c-range) c-buffer))
+ ;; (move-overlay c-fold c-beg c-end c-buffer))
+ ;; (puthash fold-sig
+ ;; (vdiff--non-nil-list a-fold b-fold c-fold)
+ ;; (vdiff-session-folds ses))))
+ ((> (1+ (- (cdr a-range) (car a-range))) vdiff-min-fold-size)
+ ;; Ranges include padding
+ (let ((a-fold (vdiff--make-fold a-buffer a-range))
+ (b-fold (vdiff--make-fold b-buffer b-range))
+ (c-fold (when c-buffer
+ (vdiff--make-fold c-buffer c-range))))
+ (dolist (fold (list a-fold b-fold c-fold))
+ (when fold
+ (cond ((or (vdiff-session-all-folds-open vdiff--session)
+ (and (not vdiff-may-close-fold-on-point)
+ (or (vdiff--point-in-fold-p a-fold)
+ (vdiff--point-in-fold-p b-fold)
+ (and c-fold
+ (vdiff--point-in-fold-p c-fold)))))
+ (vdiff--set-open-fold-props fold))
+ (t
+ (vdiff--set-closed-fold-props fold)))))
+ (overlay-put a-fold 'vdiff-other-folds
+ (vdiff--non-nil-list b-fold c-fold))
+ (overlay-put b-fold 'vdiff-other-folds
+ (vdiff--non-nil-list a-fold c-fold))
+ (when c-fold
+ (overlay-put c-fold 'vdiff-other-folds (list a-fold b-fold)))
+ (puthash fold-sig (vdiff--non-nil-list a-fold b-fold c-fold)
+ (vdiff-session-folds ses)))))))))
+
+(defun vdiff--remove-fold-overlays (_)
+ (clrhash (vdiff-session-folds vdiff--session)))
+
+(defun vdiff--add-diff-overlay (this-len other-len-1 other-len-2)
+ (let ((max-other-len (max (if other-len-1 other-len-1 0)
+ (if other-len-2 other-len-2 0))))
+ (cond ((and (null other-len-1) (null other-len-2))
+ (vdiff--add-hunk-overlay this-len t))
+ ((null this-len)
+ (vdiff--add-subtraction-overlay max-other-len))
+ (t
+ (vdiff--add-hunk-overlay this-len nil
+ (- max-other-len this-len))))))
+
+(defun vdiff--refresh-overlays (session)
+ "Delete and recreate overlays in both buffers."
+ (when (vdiff--buffer-p)
+ (vdiff--remove-all-overlays)
+ (let ((a-buffer (car (vdiff-session-buffers session)))
+ (b-buffer (cadr (vdiff-session-buffers session)))
+ (c-buffer (nth 2 (vdiff-session-buffers session)))
+ (a-line 1)
+ (b-line 1)
+ (c-line 1)
+ (a-last-post 1)
+ (b-last-post 1)
+ (c-last-post 1)
+ (vdiff--inhibit-diff-update t)
+ folds)
+ (save-excursion
+ (with-current-buffer a-buffer
+ (widen)
+ (goto-char (point-min)))
+ (with-current-buffer b-buffer
+ (widen)
+ (goto-char (point-min)))
+ (when c-buffer
+ (with-current-buffer c-buffer
+ (widen)
+ (goto-char (point-min))))
+ (dolist (hunk (vdiff-session-diff-data session))
+ (let* ((a-range (nth 0 hunk))
+ (b-range (nth 1 hunk))
+ (c-range (nth 2 hunk))
+ (a-beg (car a-range))
+ (a-end (cdr a-range))
+ (a-post (if a-end (1+ a-end) a-beg))
+ (a-len (when a-end (1+ (- a-end a-beg))))
+ (b-beg (car b-range))
+ (b-end (cdr b-range))
+ (b-post (if b-end (1+ b-end) b-beg))
+ (b-len (when b-end (1+ (- b-end b-beg))))
+ c-beg c-end c-post c-len)
+ (when c-buffer
+ (setq c-beg (car c-range))
+ (setq c-end (cdr c-range))
+ (setq c-post (if c-end (1+ c-end) c-beg))
+ (setq c-len (when c-end (1+ (- c-end c-beg)))))
+
+ (push (list (cons a-last-post (1- a-beg))
+ (cons b-last-post (1- b-beg))
+ (when c-beg
+ (cons c-last-post (1- c-beg))))
+ folds)
+ (setq a-last-post a-post)
+ (setq b-last-post b-post)
+ (when c-buffer
+ (setq c-last-post c-post))
+
+ (let (ovr-a ovr-b ovr-c)
+ (with-current-buffer a-buffer
+ (forward-line (- a-beg a-line))
+ (setq a-line a-beg)
+ (setq ovr-a (vdiff--add-diff-overlay a-len b-len c-len)))
+ (with-current-buffer b-buffer
+ (forward-line (- b-beg b-line))
+ (setq b-line b-beg)
+ (setq ovr-b (vdiff--add-diff-overlay b-len a-len c-len)))
+ (when c-buffer
+ (with-current-buffer c-buffer
+ (forward-line (- c-beg c-line))
+ (setq c-line c-beg)
+ (setq ovr-c (vdiff--add-diff-overlay c-len a-len b-len))))
+ (let ((ovr-group (vdiff--non-nil-list ovr-a ovr-b ovr-c)))
+ (overlay-put ovr-a 'vdiff-a t)
+ (overlay-put ovr-a 'vdiff-hunk-overlays ovr-group)
+ (overlay-put ovr-b 'vdiff-b t)
+ (overlay-put ovr-b 'vdiff-hunk-overlays ovr-group)
+ (when c-buffer
+ (overlay-put ovr-c 'vdiff-c t)
+ (overlay-put ovr-c 'vdiff-hunk-overlays ovr-group))))))
+ (push (list (cons a-last-post
+ (with-current-buffer a-buffer
+ (line-number-at-pos (point-max))))
+ (cons b-last-post
+ (with-current-buffer b-buffer
+ (line-number-at-pos (point-max))))
+ (when c-buffer
+ (cons c-last-post
+ (with-current-buffer c-buffer
+ (line-number-at-pos (point-max))))))
+ folds))
+ (vdiff--add-folds a-buffer b-buffer c-buffer folds))))
+
+;; * Send/Receive changes
+
+(defun vdiff--region-or-close-overlay ()
+ "Return region bounds if active. Otherwise check if there is an
+overlay at point and return it if there is. If this fails check a
+line above. Always search to the end of the current line as
+well. This only returns bounds for `interactive'."
+ (if (region-active-p)
+ (prog1
+ (list (region-beginning) (region-end))
+ (deactivate-mark))
+ (list (if (or (= (line-number-at-pos) 1)
+ (vdiff--overlay-at-pos
+ (line-beginning-position)))
+ (line-beginning-position)
+ (save-excursion
+ (forward-line -1)
+ (line-beginning-position)))
+ (save-excursion
+ (forward-line 1)
+ (point)))))
+
+(defun vdiff-send-changes (beg end &optional receive targets dont-refresh)
+ "Send changes in this hunk to another vdiff buffer. If the
+region is active, send all changes found in the region. Otherwise
+use the hunk under point or on the immediately preceding line."
+ (interactive (vdiff--region-or-close-overlay))
+ (let* ((vdiff--inhibit-diff-update t)
+ target-ovrs)
+ (dolist (ovr (overlays-in beg end))
+ (cond ((and receive
+ (setq target-ovrs
+ (or targets (vdiff--target-overlays ovr t))))
+ (let ((pos (overlay-start (car target-ovrs))))
+ (with-current-buffer (overlay-buffer (car target-ovrs))
+ (vdiff-send-changes pos (1+ pos) nil nil t))))
+ ((memq (overlay-get ovr 'vdiff-type)
+ '(change addition))
+ (vdiff--transmit-change ovr targets))
+ ((eq (overlay-get ovr 'vdiff-type) 'subtraction)
+ (vdiff--transmit-subtraction ovr targets))))
+ (unless dont-refresh
+ (vdiff-refresh #'vdiff--scroll-function))))
+
+(defun vdiff-send-changes-and-step ()
+ "Use `vdiff-send-changes' then `vdiff-next-hunk'."
+ (interactive)
+ (call-interactively 'vdiff-send-changes)
+ (call-interactively 'vdiff-next-hunk))
+
+(defun vdiff-receive-changes (beg end)
+ "Receive the changes corresponding to this position from
+another vdiff buffer. This is equivalent to jumping to the
+corresponding buffer and sending from there. If the region is
+active, receive all corresponding changes found in the
+region. Otherwise use the changes under point or on the
+immediately preceding line."
+ (interactive (vdiff--region-or-close-overlay))
+ (vdiff-send-changes beg end t nil t)
+ (vdiff-refresh #'vdiff--scroll-function))
+
+(defun vdiff-receive-changes-and-step ()
+ "Use `vdiff-receive-changes' then `vdiff-next-hunk'."
+ (interactive)
+ (call-interactively 'vdiff-receive-changes)
+ (call-interactively 'vdiff-next-hunk))
+
+(defun vdiff--transmit-change (ovr &optional targets)
+ "Send text in OVR to corresponding overlay in other buffer."
+ (if (not (overlayp ovr))
+ (message "No change found")
+ (let* ((target-ovrs (or targets (vdiff--target-overlays ovr)))
+ (text (buffer-substring-no-properties
+ (overlay-start ovr)
+ (overlay-end ovr))))
+ (dolist (target target-ovrs)
+ (with-current-buffer (overlay-buffer target)
+ (save-excursion
+ (goto-char (overlay-start target))
+ ;; subtractions are one char too big on purpose
+ (unless (eq (overlay-get target 'vdiff-type)
+ 'subtraction)
+ (delete-region (overlay-start target)
+ (overlay-end target)))
+ (insert text))
+ (delete-overlay target)))
+ (delete-overlay ovr))))
+
+(defun vdiff--transmit-subtraction (ovr &optional targets)
+ "Same idea as `vdiff--transmit-change' except we are
+just deleting text in another buffer."
+ (if (not (overlayp ovr))
+ (message "No change found")
+ (let* ((target-ovrs (or targets
+ (vdiff--target-overlays ovr))))
+ (dolist (target target-ovrs)
+ (with-current-buffer (overlay-buffer target)
+ (delete-region (overlay-start target)
+ (overlay-end target))
+ (delete-overlay target))))))
+
+;; * Scrolling and line syncing
+
+(defun vdiff--2way-entries (a-prior a-end a-post b-prior b-end b-post)
+ ;; a-prior 0 0 b-prior
+ ;; l-beg 1 + 1 b-beg
+ ;; l-beg 2 + 2 b-end
+ ;; 3 + -
+ ;; 4 + -
+ ;; l-end 5 + -
+ ;; a-post 6 3 b-post
+ (let* (a-entries b-entries)
+ (dotimes (offset (1+ (max (- a-post a-prior)
+ (- b-post b-prior))))
+ (let ((a-line (+ a-prior offset))
+ (b-line (+ b-prior offset)))
+ (cond ((= offset 0)
+ (push (list a-line b-line 0) a-entries)
+ (push (list b-line a-line 0) b-entries))
+ ((and a-end b-end
+ (<= b-line b-end)
+ (<= a-line a-end))
+ (push (list a-line b-line 0) a-entries)
+ (push (list b-line a-line 0) b-entries))
+ ((and (or (null a-end) (> a-line a-end))
+ (<= b-line b-post))
+ (push (list b-line a-post (- a-line (or a-end a-prior) 1))
b-entries))
+ ((and (or (null b-end) (> b-line b-end))
+ (<= a-line a-post))
+ (push (list a-line b-post (- b-line (or b-end b-prior) 1))
a-entries)))))
+ (push (list (1+ a-post) (1+ b-post) 0) a-entries)
+ (push (list (1+ b-post) (1+ a-post) 0) b-entries)
+ (cons (nreverse a-entries) (nreverse b-entries))))
+
+(defun vdiff--set-cons (vars expr)
+ (setf (car vars) (car expr))
+ (setf (cdr vars) (cdr expr)))
+
+(defun vdiff--refresh-line-maps (session)
+ "Sync information in `vdiff--line-map' with
+`vdiff--diff-data'."
+ (when (vdiff--buffer-p)
+ (let ((vdiff--inhibit-diff-update t)
+ (a-b (list (list 0 0 0)))
+ (b-a (list (list 0 0 0)))
+ (a-c (list (list 0 0 0)))
+ (c-a (list (list 0 0 0)))
+ (b-c (list (list 0 0 0)))
+ (c-b (list (list 0 0 0))))
+ (dolist (hunk (vdiff-session-diff-data session))
+ (let* ((a-lines (nth 0 hunk))
+ (a-beg (car a-lines))
+ (a-prior (1- a-beg))
+ (a-end (cdr a-lines))
+ (a-post (if a-end (1+ a-end) a-beg))
+ (b-lines (nth 1 hunk))
+ (b-beg (car b-lines))
+ (b-prior (1- b-beg))
+ (b-end (cdr b-lines))
+ (b-post (if b-end (1+ b-end) b-beg))
+ (c-lines (nth 2 hunk)))
+ (let ((new-a-b
+ (vdiff--2way-entries a-prior a-end a-post b-prior b-end
b-post)))
+ (setq a-b (nconc a-b (car new-a-b)))
+ (setq b-a (nconc b-a (cdr new-a-b)))
+ (when c-lines
+ (let* ((c-beg (car c-lines))
+ (c-prior (1- c-beg))
+ (c-end (cdr c-lines))
+ (c-post (if c-end (1+ c-end) c-beg))
+ (new-a-c
+ (vdiff--2way-entries a-prior a-end a-post c-prior c-end
c-post))
+ (new-b-c
+ (vdiff--2way-entries b-prior b-end b-post c-prior c-end
c-post)))
+ (setq a-c (nconc a-c (car new-a-c)))
+ (setq c-a (nconc c-a (cdr new-a-c)))
+ (setq b-c (nconc b-c (car new-b-c)))
+ (setq c-b (nconc c-b (cdr new-b-c))))))))
+ (setf (vdiff-session-line-maps session)
+ (if vdiff-3way-mode
+ (list (list 'a a-b a-c)
+ (list 'b b-a b-c)
+ (list 'c c-a c-b))
+ (list (list 'a a-b)
+ (list 'b b-a)))))))
+
+(defun vdiff--translate-line (line &optional from-buffer)
+ "Translate LINE in buffer A to corresponding line in buffer
+B. Go from buffer B to A if B-to-A is non nil."
+ (interactive (list (line-number-at-pos)))
+ (let* ((from-buffer (or from-buffer (vdiff--buffer-p)))
+ (maps
+ (cdr
+ (assq from-buffer (vdiff-session-line-maps vdiff--session))))
+ last-entry res-1 res-2)
+ (dolist (map maps)
+ (setq last-entry
+ (catch 'closest
+ (let (prev-entry)
+ (dolist (entry map)
+ (let ((map-line (car entry)))
+ (cond ((< map-line line)
+ (setq prev-entry entry))
+ ((= map-line line)
+ (throw 'closest entry))
+ (t
+ (throw 'closest prev-entry)))))
+ (throw 'closest prev-entry))))
+ (unless last-entry
+ (setq last-entry (list line line))
+ (message "Error in line translation %s %s" line from-buffer))
+ (if res-1
+ (setq res-2 (cons (+ (- line (car last-entry)) (cadr last-entry))
+ (nth 2 last-entry)))
+ (setq res-1 (cons (+ (- line (car last-entry)) (cadr last-entry))
+ (nth 2 last-entry)))))
+ (when (called-interactively-p 'interactive)
+ (message "This line: %s; Other line %s; vscroll-state %s; entry %s"
+ line res-1 (cdr res-1) last-entry))
+ (cons res-1 res-2)))
+
+(defun vdiff-switch-buffer (line)
+ "Jump to the line in another vdiff buffer that corresponds to
+the current one."
+ (interactive (list (line-number-at-pos)))
+ (let ((line (caar (vdiff--translate-line line))))
+ (select-window (car (vdiff--unselected-windows)))
+ (when line
+ (vdiff--move-to-line line))))
+
+(defun vdiff-restore-windows ()
+ "Restore initial window configuration."
+ (interactive)
+ (set-window-configuration
+ (vdiff-session-window-config vdiff--session)))
+
+(defun vdiff--pos-at-line-beginning (line &optional buffer)
+ "Return position at beginning of LINE in BUFFER (or current
+buffer)."
+ (with-current-buffer (or buffer (current-buffer))
+ (save-excursion
+ (vdiff--move-to-line line)
+ (line-beginning-position))))
+
+(defun vdiff--set-vscroll-and-force-update (window &optional vscroll)
+ (run-at-time
+ nil nil
+ (lambda ()
+ (unless vdiff--setting-vscroll
+ (let ((vdiff--setting-vscroll t))
+ (when (and (windowp window)
+ (window-live-p window))
+ (when (and vscroll
+ (eq vdiff-subtraction-style 'full))
+ (set-window-vscroll window vscroll))
+ (force-window-update window)))))))
+
+(defun vdiff--flag-new-command ()
+ (setq vdiff--new-command t))
+
+(defun vdiff--other-win-scroll-data (_window window-start &optional buf-c)
+ ;; need other-win, start-pos, pos and scroll-amt
+ (let* ((other-buf (nth (if buf-c 1 0) (vdiff--unselected-buffers)))
+ (other-win (nth (if buf-c 1 0) (vdiff--unselected-windows)))
+ (start-line (line-number-at-pos window-start))
+ (start-trans (vdiff--translate-line start-line))
+ (start-trans (if buf-c
+ (cdr start-trans)
+ (car start-trans)))
+ (trans (vdiff--translate-line
+ (+ (count-lines window-start (point))
+ start-line)))
+ (trans (if buf-c (cdr trans) (car trans))))
+ (when (and start-trans trans)
+ (list other-win
+ (vdiff--pos-at-line-beginning (car start-trans) other-buf)
+ (vdiff--pos-at-line-beginning (car trans) other-buf)
+ (cdr start-trans)))))
+
+(defun vdiff--scroll-function (&optional window window-start)
+ "Sync scrolling of all vdiff windows."
+ (let* ((window (or window (selected-window)))
+ (update-window-start (null window-start))
+ (window-start (or window-start (progn
+ ;; redisplay updates window-start in
+ ;; the case where the scroll function
+ ;; is called manually
+ (redisplay)
+ (window-start)))))
+ (when (and (eq window (selected-window))
+ (cl-every #'window-live-p (vdiff--all-windows))
+ (vdiff--buffer-p)
+ (not vdiff--in-scroll-hook)
+ vdiff--new-command)
+ (setq vdiff--new-command nil)
+ (let* ((2-scroll-data (vdiff--other-win-scroll-data
+ window window-start))
+ (2-win (nth 0 2-scroll-data))
+ (2-start-pos (nth 1 2-scroll-data))
+ (2-pos (nth 2 2-scroll-data))
+ (2-scroll (nth 3 2-scroll-data))
+ ;; 1 is short for this; 2 is the first other and 3 is the second
+ (vdiff--in-scroll-hook t))
+ (message "%s" 2-scroll-data)
+ (when (and 2-pos 2-start-pos)
+ (set-window-point 2-win 2-pos)
+ ;; For some reason without this unless the vscroll gets eff'd
+ (unless (= (progn
+ (when update-window-start
+ (redisplay))
+ (window-start 2-win))
+ 2-start-pos)
+ (set-window-start 2-win 2-start-pos))
+ (vdiff--set-vscroll-and-force-update 2-win 2-scroll))
+ (when vdiff-3way-mode
+ (let*
+ ((3-scroll-data (vdiff--other-win-scroll-data
+ window window-start t))
+ (3-win (nth 0 3-scroll-data))
+ (3-start-pos (nth 1 3-scroll-data))
+ (3-pos (nth 2 3-scroll-data))
+ (3-scroll (nth 3 3-scroll-data)))
+ (when (and 3-start-pos 3-pos)
+ (set-window-point 3-win 3-pos)
+ (set-window-start 3-win 3-start-pos)
+ (vdiff--set-vscroll-and-force-update 3-win 3-scroll))))))))
+
+;; (defun vdiff--post-command-hook ()
+;; "Sync scroll for `vdiff--force-sync-commands'."
+;; ;; Use real-this-command because evil-next-line and evil-previous-line
pretend
+;; ;; they are next-line and previous-line
+;; (when (and (memq this-command vdiff--force-sync-commands)
+;; (not vdiff--in-post-command-hook)
+;; (vdiff--buffer-p))
+;; (let ((vdiff--in-post-command-hook t))
+;; (when (and (sit-for 0.05)
+;; (eq vdiff-subtraction-style 'full))
+;; (vdiff--scroll-function)))))
+
+(defun vdiff--after-change-function (&rest _)
+ (when (vdiff--buffer-p)
+ (unless (vdiff-session-diff-stale vdiff--session)
+ (setf (vdiff-session-diff-stale vdiff--session) t)
+ (when (timerp vdiff--after-change-timer)
+ (cancel-timer vdiff--after-change-timer))
+ (setq vdiff--after-change-timer
+ (run-with-idle-timer
+ vdiff--after-change-refresh-delay
+ nil (lambda ()
+ (let ((vdiff-may-close-fold-on-point nil))
+ (vdiff-refresh))))))))
+
+(defun vdiff--set-open-fold-props (ovr)
+ "Set overlay properties to open fold OVR."
+ (overlay-put ovr 'vdiff-fold-open t)
+ (overlay-put ovr 'display nil)
+ (overlay-put ovr 'intangible nil)
+ (overlay-put ovr 'before-string
+ (propertize
+ " " 'display '(left-fringe vdiff--top-left-angle)))
+ (overlay-put ovr 'line-prefix
+ (propertize
+ " " 'display '(left-fringe vdiff--vertical-bar)))
+ (overlay-put ovr 'after-string
+ (propertize
+ " " 'display '(left-fringe vdiff--bottom-left-angle))))
+
+(defun vdiff--set-closed-fold-props (ovr)
+ "Set overlay properties to close fold OVR."
+ (when (vdiff--point-in-fold-p ovr)
+ (goto-char (overlay-start ovr)))
+ (overlay-put ovr 'vdiff-fold-open nil)
+ (overlay-put ovr 'before-string nil)
+ (overlay-put ovr 'line-prefix nil)
+ (overlay-put ovr 'after-string nil)
+ (overlay-put ovr 'intangible t)
+ (overlay-put ovr 'display (overlay-get ovr 'vdiff-fold-text)))
+
+(defun vdiff-open-fold (beg end)
+ "Open folds between BEG and END, as well as corresponding ones
+in other vdiff buffer. If called interactively, either open fold
+at point or on prior line. If the region is active open all folds
+in the region."
+ (interactive (vdiff--region-or-close-overlay))
+ (dolist (ovr (overlays-in beg end))
+ (when (eq (overlay-get ovr 'vdiff-type) 'fold)
+ (vdiff--set-open-fold-props ovr)
+ (dolist (other-fold (overlay-get ovr 'vdiff-other-folds))
+ (vdiff--set-open-fold-props other-fold))))
+ (vdiff--scroll-function))
+
+(defun vdiff-close-fold (beg end)
+ "Close folds between BEG and END, as well as corresponding ones
+in other vdiff buffer. If called interactively, either close fold
+at point or on prior line. If the region is active close all
+folds in the region."
+ (interactive (vdiff--region-or-close-overlay))
+ (dolist (ovr (overlays-in beg end))
+ (when (eq (overlay-get ovr 'vdiff-type) 'fold)
+ (setf (vdiff-session-all-folds-open vdiff--session) nil)
+ (vdiff--set-closed-fold-props ovr)
+ (dolist (other-fold (overlay-get ovr 'vdiff-other-folds))
+ (vdiff--set-closed-fold-props other-fold))))
+ (vdiff--scroll-function))
+
+(defun vdiff-open-all-folds ()
+ "Open all folds in both buffers"
+ (interactive)
+ (save-excursion
+ (setf (vdiff-session-all-folds-open vdiff--session) t)
+ (vdiff-open-fold (point-min) (point-max))))
+
+(defun vdiff-close-all-folds ()
+ "Close all folds in both buffers"
+ (interactive)
+ (save-excursion
+ (setf (vdiff-session-all-folds-open vdiff--session) nil)
+ (vdiff-close-fold (point-min) (point-max))))
+
+(defun vdiff-close-other-folds ()
+ "Close all other folds in both buffers"
+ (interactive)
+ (dolist (ovr (overlays-in (point-min) (point-max)))
+ (when (and (eq (overlay-get ovr 'vdiff-type) 'fold)
+ (not (vdiff--point-in-fold-p ovr)))
+ (setf (vdiff-session-all-folds-open vdiff--session) nil)
+ (vdiff--set-closed-fold-props ovr)
+ (dolist (other-fold (overlay-get ovr 'vdiff-other-folds))
+ (vdiff--set-closed-fold-props other-fold)))))
+
+;; * Movement
+
+(defun vdiff--nth-hunk (&optional n use-folds)
+ "Return point at Nth hunk in buffer. Use folds instead of hunks
+with non-nil USE-FOLDS."
+ (let* ((n (or n 1))
+ (reverse (< n 0))
+ pnt)
+ (save-excursion
+ (dotimes (_i (abs n))
+ ;; Escape current overlay
+ (vdiff--maybe-exit-overlay reverse)
+ (setq pnt (point))
+ ;; Find next overlay
+ (while (not (or (and reverse (bobp))
+ (and (not reverse) (eobp))
+ (and use-folds
+ (vdiff--fold-at-point-p))
+ (and (not use-folds)
+ (vdiff--hunk-at-point-p))))
+ (setq pnt
+ (goto-char (if reverse
+ (previous-overlay-change pnt)
+ (next-overlay-change pnt)))))))
+ pnt))
+
+(defun vdiff-next-hunk (arg)
+ "Jump to next change in this buffer."
+ (interactive "p")
+ (let ((count (or arg 1)))
+ (goto-char (vdiff--nth-hunk count))
+ (recenter)))
+
+(defun vdiff-previous-hunk (arg)
+ "Jump to previous change in this buffer."
+ (interactive "p")
+ (let ((count (or (- arg) -1)))
+ (goto-char (vdiff--nth-hunk count))
+ (recenter)))
+
+(defun vdiff-next-fold (arg)
+ "Jump to next fold in this buffer."
+ (interactive "p")
+ (let ((count (or arg 1)))
+ (goto-char (vdiff--nth-hunk count t))
+ (recenter)))
+
+(defun vdiff-previous-fold (arg)
+ "Jump to previous fold in this buffer."
+ (interactive "p")
+ (let ((count (or (- arg) -1)))
+ (goto-char (vdiff--nth-hunk count t))
+ (recenter)))
+
+;; * Session
+
+(defun vdiff--init-session
+ (buffer-a buffer-b
+ &optional buffer-c on-quit prior-window-config kill-buffers-on-quit)
+ (make-vdiff-session
+ :buffers (vdiff--non-nil-list buffer-a buffer-b buffer-c)
+ :process-buffer (generate-new-buffer-name " *vdiff* ")
+ :word-diff-output-buffer (generate-new-buffer-name " *vdiff-word* ")
+ :folds (make-hash-table :test 'equal :weakness 'value)
+ :case-args ""
+ :whitespace-args ""
+ :prior-window-config prior-window-config
+ :on-quit on-quit
+ :kill-buffers-on-quit kill-buffers-on-quit))
+
+;; * Entry points
+
+;;;###autoload
+(defun vdiff-files (file-a file-b &optional rotate on-quit)
+ "Start a vdiff session. If called interactively, you will be
+asked to select two files. ROTATE adjusts the buffer's
+initial layout. A prefix argument can be used to set this
+variable interactively. ON-QUIT is a function to run on exiting
+the vdiff session. It is called with the two vdiff buffers as
+arguments."
+ (interactive
+ (let* ((file-a (read-file-name "File 1: "))
+ (default-directory
+ (file-name-directory file-a)))
+ (list
+ file-a
+ (read-file-name
+ (format "[File 1 %s] File 2: "
+ (file-name-nondirectory file-a)))
+ current-prefix-arg)))
+ (vdiff-buffers (find-file-noselect file-a)
+ (find-file-noselect file-b)
+ rotate on-quit))
+
+(defcustom vdiff-2way-layout-function 'vdiff-2way-layout-function-default
+ "Function to layout windows in 2way diffs.
+
+Should take the arguments (BUFFER-A BUFFER-B &optional ROTATE),
+where rotate switches from vertical to rotate (or vice
+versa)."
+ :group 'vdiff
+ :type 'function)
+
+(defun vdiff-2way-layout-function-default (buffer-a buffer-b &optional rotate)
+ (delete-other-windows)
+ (switch-to-buffer buffer-a)
+ (set-window-buffer
+ (if rotate
+ (split-window-vertically)
+ (split-window-horizontally))
+ buffer-b))
+
+;;;###autoload
+(defun vdiff-buffers
+ (buffer-a buffer-b
+ &optional rotate on-quit restore-windows-on-quit kill-buffers-on-quit)
+ "Start a vdiff session. If called interactively, you will be
+asked to select two buffers. ROTATE adjusts the buffer's
+initial layout. A prefix argument can be used to set this
+variable interactively. ON-QUIT is a function to run on exiting
+the vdiff session. It is called with the two vdiff buffers as
+arguments. The last two options, RESTORE-WINDOWS-ON-QUIT and
+KILL-BUFFERS-ON-QUIT restore the previous window configuration
+and kill the vdiff buffers after quitting vdiff. Note that if you
+are going to kill the buffers you should probably be using a
+function for ON-QUIT to do something useful with the result."
+ (interactive
+ (let* ((buffer-a
+ (get-buffer
+ (read-buffer
+ "Buffer 1: " (current-buffer)))))
+ (list
+ buffer-a
+ (get-buffer
+ (read-buffer
+ (format "[Buffer 1 %s] Buffer 2: " buffer-a)
+ (window-buffer (next-window (selected-window) nil 0))))
+ current-prefix-arg)))
+ (let ((prior-window-config (when restore-windows-on-quit
+ (current-window-configuration)))
+ (buffer-a (get-buffer buffer-a))
+ (buffer-b (get-buffer buffer-b)))
+ (if (functionp vdiff-2way-layout-function)
+ (funcall vdiff-2way-layout-function buffer-a buffer-b rotate)
+ (delete-other-windows)
+ (switch-to-buffer buffer-a)
+ (set-window-buffer
+ (if rotate
+ (split-window-vertically)
+ (split-window-horizontally))
+ buffer-b))
+ (setq vdiff--temp-session
+ (vdiff--init-session
+ buffer-a buffer-b nil
+ on-quit prior-window-config kill-buffers-on-quit))
+ (dolist (buf (list buffer-a buffer-b))
+ (with-current-buffer buf
+ (vdiff-mode -1)
+ (vdiff-3way-mode -1)
+ (vdiff-mode 1)))
+ (setq vdiff--temp-session nil)
+ (vdiff-refresh #'vdiff--scroll-function)))
+
+(defcustom vdiff-3way-layout-function 'vdiff-3way-layout-function-default
+ "Function to layout windows in 3way diffs.
+
+Should take the arguments (BUFFER-A BUFFER-B BUFFER-C)."
+ :group 'vdiff
+ :type 'function)
+
+(defun vdiff-3way-layout-function-default (buffer-a buffer-b buffer-c)
+ (delete-other-windows)
+ (switch-to-buffer buffer-a)
+ (set-window-buffer (split-window-vertically) buffer-c)
+ (set-window-buffer (split-window-horizontally) buffer-b))
+
+;;;###autoload
+(defun vdiff-buffers3
+ (buffer-a buffer-b buffer-c
+ &optional on-quit restore-windows-on-quit kill-buffers-on-quit)
+ "Start a vdiff session. If called interactively, you will be
+asked to select two buffers. ON-QUIT is a function to run on
+exiting the vdiff session. It is called with the three vdiff
+buffers as arguments. The last two options, RESTORE-WINDOWS-ON-QUIT and
+KILL-BUFFERS-ON-QUIT restore the previous window configuration
+and kill the vdiff buffers after quitting vdiff. Note that if you
+are going to kill the buffers you should probably be using a
+function for ON-QUIT to do something useful with the result."
+ (interactive
+ (let* ((buffer-a
+ (get-buffer
+ (read-buffer
+ "Buffer 1: " (current-buffer))))
+ (buffer-b
+ (get-buffer
+ (read-buffer
+ (format "[2:%s] Buffer 3: " buffer-a)
+ (window-buffer (next-window (selected-window))))))
+ (buffer-c
+ (get-buffer
+ (read-buffer
+ (format "[1:%s 2:%s] Buffer 3: " buffer-a buffer-b)
+ (window-buffer (next-window (selected-window)))))))
+ (list buffer-a buffer-b buffer-c)))
+ (let ((prior-window-config (when restore-windows-on-quit
+ (current-window-configuration)))
+ (buffer-a (get-buffer buffer-a))
+ (buffer-b (get-buffer buffer-b))
+ (buffer-c (get-buffer buffer-c)))
+ (funcall vdiff-3way-layout-function buffer-a buffer-b buffer-c)
+ (setq vdiff--temp-session
+ (vdiff--init-session
+ buffer-a buffer-b buffer-c
+ on-quit prior-window-config kill-buffers-on-quit))
+ (dolist (buf (list buffer-a buffer-b buffer-c))
+ (with-current-buffer buf
+ (vdiff-mode -1)
+ (vdiff-3way-mode -1)
+ (vdiff-3way-mode 1)))
+ (setq vdiff--temp-session nil)
+ (vdiff-refresh #'vdiff--scroll-function)))
+
+;;;###autoload
+(defun vdiff-merge-conflict (file &optional restore-windows-on-quit)
+ "Start vdiff session using merge conflicts marked in FILE."
+ (interactive (list buffer-file-name))
+ (with-current-buffer (find-file-noselect file)
+ (require 'smerge-mode)
+ (let* ((smerge-buffer (current-buffer))
+ (mode major-mode)
+ (filename (file-name-directory (or buffer-file-name "-")))
+ (mine (generate-new-buffer
+ (concat "*" filename " "
+ (smerge--get-marker smerge-begin-re "MINE")
+ "*")))
+ (other (generate-new-buffer
+ (concat "*" filename " "
+ (smerge--get-marker smerge-end-re "OTHER")
+ "*")))
+ (ancestor (generate-new-buffer
+ (concat "*" filename " "
+ (smerge--get-marker smerge-end-re "ANCESTOR")
+ "*")))
+ ancestor-used merge-buffer)
+ (with-current-buffer mine
+ (buffer-disable-undo)
+ (insert-buffer-substring smerge-buffer)
+ (goto-char (point-min))
+ (while (smerge-find-conflict)
+ (smerge-keep-n 1))
+ (buffer-enable-undo)
+ (set-buffer-modified-p nil)
+ (funcall mode))
+
+ (with-current-buffer ancestor
+ (buffer-disable-undo)
+ (insert-buffer-substring smerge-buffer)
+ (goto-char (point-min))
+ (while (smerge-find-conflict)
+ (when (match-beginning 2)
+ (setq ancestor-used t)
+ (smerge-keep-n 2)))
+ (buffer-enable-undo)
+ (set-buffer-modified-p nil)
+ (funcall mode))
+
+ (with-current-buffer other
+ (buffer-disable-undo)
+ (insert-buffer-substring smerge-buffer)
+ (goto-char (point-min))
+ (while (smerge-find-conflict)
+ (smerge-keep-n 3))
+ (buffer-enable-undo)
+ (set-buffer-modified-p nil)
+ (funcall mode))
+
+ (setq merge-buffer
+ (if (and ancestor-used vdiff-use-ancestor-as-merge-buffer)
+ ancestor
+ smerge-buffer))
+
+ (vdiff-buffers3
+ mine other merge-buffer
+ `(lambda (mine other merge-buffer)
+ (with-current-buffer ,smerge-buffer
+ (when (yes-or-no-p (format "Conflict resolution finished; save %s?"
+ buffer-file-name))
+ (when ,(and ancestor-used vdiff-use-ancestor-as-merge-buffer)
+ (erase-buffer)
+ (insert-buffer-substring merge-buffer))
+ (save-buffer)))
+ (when (buffer-live-p mine) (kill-buffer mine))
+ (when (buffer-live-p ,ancestor) (kill-buffer ,ancestor))
+ (when (buffer-live-p other) (kill-buffer other)))
+ restore-windows-on-quit))))
+
+;;;###autoload
+(defun vdiff-files3 (file-a file-b file-c &optional on-quit)
+ "Start a vdiff session with 3 files. If called interactively,
+you will be asked to select two files."
+ (interactive
+ (let* ((file-a (read-file-name "File 1: "))
+ (default-directory
+ (file-name-directory file-a))
+ (file-b
+ (read-file-name
+ (format "[1:%s] File 2: "
+ (file-name-nondirectory file-a))))
+ (file-c
+ (read-file-name
+ (format "[1:%s 2:%s] File 3: "
+ (file-name-nondirectory file-a)
+ (file-name-nondirectory file-b)))))
+ (list file-a file-b file-c)))
+ (vdiff-buffers3 (find-file-noselect file-a)
+ (find-file-noselect file-b)
+ (find-file-noselect file-c)
+ on-quit))
+
+;;;###autoload
+(defun vdiff-current-file ()
+ "Start vdiff between current buffer and its file on disk.
+This command can be used instead of `revert-buffer'. If there is
+nothing to revert then this command fails."
+ (interactive)
+ ;; Taken from `ediff-current-file'
+ (unless (or (not (eq revert-buffer-function #'revert-buffer--default))
+ (not (eq revert-buffer-insert-file-contents-function
+ #'revert-buffer-insert-file-contents--default-function))
+ (and buffer-file-number
+ (or (buffer-modified-p)
+ (not (verify-visited-file-modtime
+ (current-buffer))))))
+ (error "Nothing to revert"))
+ (let* ((auto-save-p (and (recent-auto-save-p)
+ buffer-auto-save-file-name
+ (file-readable-p buffer-auto-save-file-name)
+ (y-or-n-p
+ "Buffer has been auto-saved recently. Compare
with auto-save file? ")))
+ (file-name (if auto-save-p
+ buffer-auto-save-file-name
+ buffer-file-name))
+ (revert-buf-name (concat "FILE=" file-name))
+ (revert-buf (get-buffer revert-buf-name))
+ (current-major major-mode))
+ (unless file-name
+ (error "Buffer does not seem to be associated with any file"))
+ (when revert-buf
+ (kill-buffer revert-buf)
+ (setq revert-buf nil))
+ (setq revert-buf (get-buffer-create revert-buf-name))
+ (with-current-buffer revert-buf
+ (insert-file-contents file-name)
+ ;; Assume same modes:
+ (funcall current-major))
+ (vdiff-buffers revert-buf (current-buffer)
+ nil
+ (lambda (rbuf _)
+ (when (buffer-live-p rbuf)
+ (kill-buffer rbuf)))
+ t)))
+
+;; (defvar vdiff-quit-hook nil)
+
+(defun vdiff-quit ()
+ "Quit `vdiff-mode' and clean up."
+ (interactive)
+ (if (null vdiff--session)
+ (user-error "Not in a vdiff buffer")
+ (let ((ses vdiff--session))
+ (when (functionp (vdiff-session-on-quit ses))
+ (apply (vdiff-session-on-quit ses)
+ (vdiff-session-buffers ses)))
+ (dolist (buf (list (vdiff-session-process-buffer
+ ses)
+ (vdiff-session-word-diff-output-buffer
+ ses)))
+ (when (process-live-p (get-buffer-process buf))
+ (kill-process (get-buffer-process buf)))
+ (when (buffer-live-p buf) (kill-buffer buf)))
+ (dolist (buf (vdiff-session-buffers ses))
+ (when (buffer-live-p buf)
+ (with-current-buffer buf
+ (if vdiff-3way-mode
+ (vdiff-3way-mode -1)
+ (vdiff-mode -1)))
+ (when (vdiff-session-kill-buffers-on-quit ses)
+ (kill-buffer buf))))
+ ;; (run-hooks 'vdiff-quit-hook)
+ (when (vdiff-session-prior-window-config ses)
+ (set-window-configuration
+ (vdiff-session-prior-window-config ses))))
+ (setq vdiff--session nil)
+ (message "vdiff exited")))
+
+(defvar vdiff-mode-map (make-sparse-keymap))
+
+(defvar vdiff-3way-mode-map (make-sparse-keymap))
+
+(defvar vdiff-mode-prefix-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "c" 'vdiff-close-fold)
+ (define-key map "C" 'vdiff-close-all-folds)
+ (define-key map "f" 'vdiff-refine-this-hunk)
+ (define-key map "F" 'vdiff-refine-all-hunks)
+ (define-key map "g" 'vdiff-switch-buffer)
+ (define-key map "h" 'vdiff-hydra/body)
+ (define-key map "ic" 'vdiff-toggle-case)
+ (define-key map "iw" 'vdiff-toggle-whitespace)
+ (define-key map "n" 'vdiff-next-hunk)
+ (define-key map "N" 'vdiff-next-fold)
+ (define-key map "o" 'vdiff-open-fold)
+ (define-key map "O" 'vdiff-open-all-folds)
+ (define-key map "p" 'vdiff-previous-hunk)
+ (define-key map "P" 'vdiff-previous-fold)
+ (define-key map "q" 'vdiff-quit)
+ (define-key map "r" 'vdiff-receive-changes)
+ (define-key map "R" 'vdiff-receive-changes-and-step)
+ (define-key map "s" 'vdiff-send-changes)
+ (define-key map "S" 'vdiff-send-changes-and-step)
+ (define-key map "x" 'vdiff-remove-refinements-in-hunk)
+ (define-key map "t" 'vdiff-close-other-folds)
+ (define-key map "u" 'vdiff-refresh)
+ (define-key map "w" 'vdiff-save-buffers)
+ map))
+
+(defvar vdiff-scroll-lock-mode)
+
+(defun vdiff--buffer-init ()
+ ;; this is a buffer-local var
+ (setq vdiff--session vdiff--temp-session)
+ (setq cursor-in-non-selected-windows nil)
+ (add-hook 'after-save-hook #'vdiff-refresh nil t)
+ (add-hook 'after-change-functions #'vdiff--after-change-function nil t)
+ (add-hook 'pre-command-hook #'vdiff--flag-new-command nil t)
+ (setf (vdiff-session-window-config vdiff--session)
+ (current-window-configuration)))
+
+(defun vdiff--buffer-cleanup ()
+ (vdiff--remove-all-overlays)
+ (setq cursor-in-non-selected-windows t)
+ (remove-hook 'after-save-hook #'vdiff-refresh t)
+ (remove-hook 'after-change-functions #'vdiff--after-change-function t)
+ (remove-hook 'pre-command-hook #'vdiff--flag-new-command t)
+ (remove-hook 'window-scroll-functions #'vdiff--scroll-function t))
+
+(define-minor-mode vdiff-mode
+ "Minor mode active in a vdiff session involving two
+buffers. This sets up key bindings in `vdiff-mode-map' and adds
+hooks to refresh diff on changes. This will be enabled
+automatically after calling commands like `vdiff-files' or
+`vdiff-buffers'."
+ nil " vdiff" 'vdiff-mode-map
+ (cond (vdiff-mode
+ (vdiff--buffer-init)
+ (when vdiff-lock-scrolling
+ (add-hook 'window-scroll-functions #'vdiff--scroll-function nil t)))
+ (t
+ (vdiff--buffer-cleanup))))
+
+(define-minor-mode vdiff-3way-mode
+ "Minor mode active in a vdiff session involving three
+buffers. This sets up key bindings in `vdiff-3way-mode-map' and
+adds hooks to refresh diff on changes. This will be enabled
+automatically after calling commands like `vdiff-files3' or
+`vdiff-buffers3'."
+ nil " vdiff3" 'vdiff-3way-mode-map
+ (cond (vdiff-3way-mode
+ (vdiff--buffer-init)
+ (when vdiff-lock-scrolling
+ (add-hook 'window-scroll-functions #'vdiff--scroll-function nil t)))
+ (t
+ (vdiff--buffer-cleanup))))
+
+(define-minor-mode vdiff-scroll-lock-mode
+ "Lock scrolling between vdiff buffers. This minor mode will be
+enabled automatically if `vdiff-lock-scrolling' is non-nil."
+ nil nil nil
+ (cond (vdiff-scroll-lock-mode
+ (unless (or vdiff-mode vdiff-3way-mode)
+ (user-error "Must enable vdiff-mode first"))
+ (vdiff--with-all-buffers
+ (add-hook 'window-scroll-functions #'vdiff--scroll-function nil t))
+ (message "Scrolling locked"))
+ (t
+ (vdiff--with-all-buffers
+ (remove-hook 'window-scroll-functions #'vdiff--scroll-function t))
+ (message "Scrolling unlocked"))))
+
+(defun vdiff--current-case ()
+ (if (string= "" (vdiff-session-case-args vdiff--session))
+ "off"
+ "on (-i)"))
+
+(defun vdiff--current-whitespace ()
+ (pcase (vdiff-session-whitespace-args vdiff--session)
+ ("" "off")
+ ("-w" "all (-w)")
+ ("-b" "space changes (-b)")
+ ("-B" "blank lines (-B)")))
+
+(defhydra vdiff-toggle-hydra (nil nil :hint nil)
+ (concat (propertize
+ "\
+ Toggles"
+ 'face 'header-line)
+ "
+ _c_ ignore case (current: %s(vdiff--current-case))
+ _w_ ignore whitespace (current: %s(vdiff--current-whitespace))
+ _q_ back to main hydra")
+
+ ("c" vdiff-toggle-case)
+ ("w" vdiff-toggle-whitespace)
+ ("q" vdiff-hydra/body :exit t))
+
+(defhydra vdiff-hydra (nil nil :hint nil :foreign-keys run)
+ (concat (propertize
+ "\
+ Navigation^^^^ Refine^^ Transmit^^^^ Folds^^^^
Other^^^^ "
+ 'face 'header-line)
+ "
+ _n_/_N_ next hunk/fold _f_ this _s_/_S_ send (+step) _o_/_O_ open
(all) _i_ ^ ^ toggles
+ _p_/_P_ prev hunk/fold _F_ all _r_/_R_ receive (+step) _c_/_C_ close
(all) _u_ ^ ^ update diff
+ _g_^ ^ switch buffers _x_ clear ^ ^ ^ ^ _t_ ^ ^ close
other _w_ ^ ^ save buffers
+ ^ ^^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
_q_/_Q_ quit hydra/vdiff
+ ignore case: %s(vdiff--current-case) | ignore whitespace:
%s(vdiff--current-whitespace)")
+ ("n" vdiff-next-hunk)
+ ("p" vdiff-previous-hunk)
+ ("N" vdiff-next-fold)
+ ("P" vdiff-previous-fold)
+ ("g" vdiff-switch-buffer)
+ ("s" vdiff-send-changes)
+ ("S" vdiff-send-changes-and-step)
+ ("r" vdiff-receive-changes)
+ ("R" vdiff-receive-changes-and-step)
+ ("o" vdiff-open-fold)
+ ("O" vdiff-open-all-folds)
+ ("c" vdiff-close-fold)
+ ("C" vdiff-close-all-folds)
+ ("t" vdiff-close-other-folds)
+ ("u" vdiff-refresh)
+ ("w" vdiff-save-buffers)
+ ("f" vdiff-refine-this-hunk)
+ ("F" vdiff-refine-all-hunks)
+ ("x" vdiff-remove-refinements-in-hunk)
+ ("i" vdiff-toggle-hydra/body :exit t)
+ ("q" nil :exit t)
+ ("Q" vdiff-quit :exit t))
+
+(provide 'vdiff)
+;;; vdiff.el ends here
![https://melpa.org/#/vdiff][file:https://melpa.org/packages/vdiff-badge.svg](https://melpa.org/#/vdiff][file:https://melpa.org/packages/vdiff-badge.svg){kind=link}