Correct backward-kill-word behavior

3 files changed, 57 insertions, 1 deletions

@@ -41,6 +41,7 @@
            "C-x C-o" #'+open-paragraph
            "C-w" #'+kill-word-backward-or-region
            "C-x C-m" #'execute-extended-command  ; original: coding systems
+           "C-<backspace>" #'+backward-kill-word
            ;; Alright, Yegge... NOPE! C-x t is tab prefix ... (maybe F6 or something?)
            ;; "C-x t" #'beginning-of-buffer
            ;; "C-x e" #'end-of-buffer
@@ -2028,8 +2029,9 @@ See also `crux-reopen-as-root-mode'."
   (add-hook '+init-mode-hook #'flymake-mode-off))
 
 (setup (:straight paredit)
+  (:also-load +paredit)
   (:bind "DEL" #'paredit-backward-delete
-         "C-<backspace>" #'paredit-backward-kill-word
+         "C-<backspace>" #'+paredit-backward-kill-word
          "C-w" (lambda (arg) (interactive "P")
                  (+kill-word-backward-or-region arg
                                                 #'paredit-backward-kill-word))
@@ -244,6 +244,34 @@ backward.  It defaults to `backward-kill-word'."
                           #'kill-region
                         (or backward-kill-word-fn #'backward-kill-word))))
 
+(defun +backward-kill-word-wrapper (fn &optional arg)
+  "Kill backward using FN until the beginning of a word, smartly.
+If point is on at the beginning of a line, kill the previous new
+line.  If the only thing before point on the current line is
+whitespace, kill that whitespace.
+
+With argument ARG: if ARG is a number, just call FN
+ARG times.  Otherwise, just call FN."
+  ;; I want this to be a wrapper so that I can call other word-killing functions
+  ;; with it.  It's *NOT* advice because those functions probably use
+  ;; `backward-kill-word' under the hood (looking at you, paredit), so advice
+  ;; will make things weird.
+  (if (null arg)
+      (cond
+       ((looking-back "^" 1)
+        (let ((delete-active-region nil))
+          (delete-backward-char 1)))
+       ((looking-back "^[  ]*")
+        (delete-horizontal-space :backward-only))
+       (t (call-interactively fn)))
+    (funcall fn (if (listp arg) 1 arg))))
+
+(defun +backward-kill-word (&optional arg)
+  "Kill word backward using `backward-kill-word'.
+ARG is passed to `backward-kill-word'."
+  (interactive "P")
+  (+backward-kill-word-wrapper #'backward-kill-word arg))
+
 ;; ... and advice
 
 ;; Indent the region after a yank.
@@ -0,0 +1,26 @@
+;;; +paredit.el --- bespoke paredit stuffs -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;;; Code:
+
+(require '+emacs)                       ; `+backward-kill-word-wrapper'
+
+(defun +paredit--backward-kill-word (&optional n)
+  "Perform `paredit-backward-kill-word' N times."
+  (interactive "p")
+  (dotimes (_ (or n 1))
+    (paredit-backward-kill-word)))
+
+(defun +paredit-backward-kill-word (&optional arg)
+  "Kill a word backward using `paredit-backward-kill-word'.
+Wrapped in `+backward-kill-word-wrapper', which see.
+
+Prefix ARG means to just call `paredit-backward-kill-word'."
+  ;; Of course, `paredit-backward-kill-word' doesn't TAKE an argument ... :///
+  ;; So I had to write the wrapper above.
+  (interactive)
+  (+backward-kill-word-wrapper #'+paredit--backward-kill-word arg))
+
+(provide '+paredit)
+;;; +paredit.el ends here