From ba77033a0c81952f5b9b8e140a17c4d12f4e9d05 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <id@ypei.org>
Date: Sat, 24 Jun 2023 16:53:03 +1000
Subject: make C-k and M-k act like paredit

---
 emacs/.emacs.d/init/ycp-editing.el   |  4 +++-
 emacs/.emacs.d/lisp/my/my-editing.el | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

(limited to 'emacs')

diff --git a/emacs/.emacs.d/init/ycp-editing.el b/emacs/.emacs.d/init/ycp-editing.el
index e9c7e4c..b9ed48b 100644
--- a/emacs/.emacs.d/init/ycp-editing.el
+++ b/emacs/.emacs.d/init/ycp-editing.el
@@ -40,7 +40,8 @@
 (my-package my-editing
   (:delay 5)
   (my-keybind global-map
-    "M-k" #'my-kill-line-backward
+    "C-k" #'my-kill-forward
+    "M-k" #'my-kill-backward
     "M-w" #'my-copy-line-or-region
     "C-o" #'my-new-line-above-or-below
     "C-<" #'my-escape-url-dwim
@@ -60,6 +61,7 @@
     "C-M-y" #'my-yank-primary
     "C-a" #'my-beginning-of-line-or-indentation
     )
+  (electric-pair-mode)
   )
 
 (setq viper-mode nil)
diff --git a/emacs/.emacs.d/lisp/my/my-editing.el b/emacs/.emacs.d/lisp/my/my-editing.el
index bd3ca83..a8fe822 100644
--- a/emacs/.emacs.d/lisp/my/my-editing.el
+++ b/emacs/.emacs.d/lisp/my/my-editing.el
@@ -336,5 +336,41 @@ Basically move the line up
     (goto-line line)
     (forward-char col)))
 
+(defun my-kill-forward ()
+  "Kill towards end of line, but not out of sexp."
+  (interactive)
+  (if (eolp)
+      (delete-char 1)
+    (let ((end)
+          (eol (save-excursion (end-of-line) (point))))
+      (save-excursion
+        (skip-chars-forward " \t")
+        (while (not (or (eq end (point))
+                        (>= (point) eol)))
+          (setq end (point))
+          (ignore-errors (forward-sexp))
+          (skip-chars-forward " \t"))
+        (when (> (point) eol) (skip-chars-backward " \t"))
+        (setq end (point)))
+      (kill-region (point) end))))
+
+(defun my-kill-backward ()
+  "Kill towards beginning of line, but not out of sexp."
+  (interactive)
+  (if (bolp)
+      (delete-char -1)
+    (let ((beg)
+          (bol (save-excursion (beginning-of-line) (point))))
+      (save-excursion
+        (skip-chars-backward " \t")
+        (while (not (or (eq beg (point))
+                        (<= (point) bol)))
+          (setq beg (point))
+          (ignore-errors (backward-sexp))
+          (skip-chars-backward " \t"))
+        (when (< (point) bol) (skip-chars-forward " \t"))
+        (setq beg (point)))
+      (kill-region beg (point)))))
+
 (provide 'my-editing)
 ;;; my-editing.el ends here
-- 
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