WOAH, ediff-transition

Probably over and under engineered at the same time, but WHATEVER ITS
COOL.

config-min.org

@@ -469,6 +469,8 @@
     (setq ediff-window-setup-function 'ediff-setup-windows-plain
           ediff-split-window-function 'split-window-horizontally)
 
+    (require 'ediff-transition)
+
     (defun ediff-copy-both-to-C ()
       (interactive)
       (ediff-copy-diff ediff-current-difference nil 'C nil

lisp/ediff-transition.el

@@ -0,0 +1,103 @@
+;;; ediff-transition.el ---  -*- lexical-binding: t -*-
+
+;; Copyright (C) 2023 Benson Chu
+
+;; Author: Benson Chu <bensonchu457@gmail.com>
+;; Created: [2023-05-13 08:08]
+
+;; This file is not part of GNU Emacs
+
+;; 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 <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+;; TOOD: Apparently I can rewrite this in ediff-mult.el?
+
+(defvar ediff-transition-mode-map
+  (let ((keymap (make-sparse-keymap)))
+    (define-key keymap "N" #'ediff-transition-forward)
+    (define-key keymap "P" #'ediff-transition-backward)
+    keymap))
+
+(defun ediff-transition-display (index file-list)
+  (when ediff-transition-mode
+    (ediff-really-quit nil))
+  (ediff-files (nth index file-list)
+               (nth (1+ index) file-list)
+               '((lambda (&rest optional)
+                   (ediff-transition-mode)))))
+
+(defun ediff-transition-forward ()
+  (interactive)
+  (if (<= (1- (1- (length ediff-transition-list))) ediff-transition-index)
+      (message "Reached end of file list")
+    (cl-incf ediff-transition-index)
+    (ediff-transition-display
+     ediff-transition-index
+     ediff-transition-list)))
+
+(defun ediff-transition-backward ()
+  (interactive)
+  (if (<= ediff-transition-index 0)
+      (message "Reached beginning of file list")
+    (cl-decf ediff-transition-index)
+    (ediff-transition-display
+     ediff-transition-index
+     ediff-transition-list)))
+
+(define-minor-mode ediff-transition-mode ""
+  :lighter ediff-trans
+  :keymap ediff-transition-mode-map)
+
+;; TODO: transition (haha) away from global variables
+(defvar ediff-transition-list nil)
+(defvar ediff-transition-index 0)
+
+(defun ediff-transition (l)
+  (when (< (length l) 2)
+    (error "Must specify more than one file"))
+  (setq ediff-transition-list l
+        ediff-transition-index 0)
+  (ediff-transition-display
+   ediff-transition-index
+   ediff-transition-list))
+
+(defun ediff-transition-llvm-print-after-all (buffer)
+  (interactive
+   (list (current-buffer)))
+  (let ((window--sides-inhibit-check t))
+    (set-window-parameter (selected-window) 'window-side nil)
+    (save-excursion
+      (goto-char (point-min))
+      (let ((r (rx line-start (optional "# ") "*** "))
+            flist)
+        (re-search-forward r)
+        (let ((previous-index (match-beginning 0)))
+          (while (re-search-forward r nil t)
+            (let ((file (make-temp-file "llvm-print-after-all-" nil ".ll")))
+              (write-region previous-index (match-beginning 0) file)
+              (push file flist))
+            (setq previous-index (match-beginning 0))))
+        (ediff-transition (reverse flist))))))
+
+;; (ediff-transition
+;;  (mapcar #'(lambda (x)
+;;              (expand-file-name x
+;;                                "~/workspace/ediff-multiple"))
+;;          '("1.txt" "2.txt" "3.txt" "4.txt")))
+
+(provide 'ediff-transition)
+;;; ediff-transition.el ends here