feat(nix): inefficiently model nvim scrolling

.emacs.d/include/priime-edit.el

@@ -27,6 +27,25 @@
   (kill-line)
   (meow-insert))
 
+(defun meow-scroll-up ()
+  "Scroll down half a page like nvim's Ctrl+D."
+  (interactive)
+  (let* ((scroll-amount (/ (window-height) 2))
+         (scroll-margin 0))
+    (dotimes (_ scroll-amount)
+      (forward-line 1)
+      (scroll-up 1))))
+
+(defun meow-scroll-down ()
+  "Scroll up half a page like nvim's Ctrl+U."
+  (interactive)
+  (let* ((scroll-amount (/ (window-height) 2))
+         (scroll-margin 0))
+    (dotimes (_ scroll-amount)
+      (forward-line -1)
+      (when (not (pos-visible-in-window-p (point-min)))
+        (scroll-down 1)))))
+
 (defun message-buffer ()
   "Switch to the *Messages* buffer."
   (interactive)
@@ -77,7 +96,7 @@
   (meow-leader-define-key '("u" . "C-u"))
   (meow-motion-overwrite-define-key '("<escape>" . ignore))
   (meow-normal-define-key
-   '("?" . meow-cheatsheet)
+   '("/" . meow-undo)
    '("*" . meow-expand-0)
    '("=" . meow-expand-9)
    '("!" . meow-expand-8)
@@ -111,8 +130,7 @@
    '("B" . meow-back-symbol)
    '("c" . meow-change)
    '("C" . meow-change-line)
-   '("d" . meow-delete)
-   '("D" . meow-backward-delete)
+   '("d" . meow-scroll-up)
    '("e" . meow-line)
    '("E" . meow-goto-line)
    '("f" . meow-find)
@@ -139,8 +157,7 @@
    '("s" . meow-search)
    '("t" . meow-right)
    '("T" . meow-right-expand)
-   '("u" . meow-undo)
-   '("U" . meow-undo-in-selection)
+   '("u" . meow-scroll-down)
    '("v" . meow-visit)
    '("w" . meow-next-word)
    '("W" . meow-next-symbol)