emacs 中的 ctrl-backspace 会删除所有空格,这很好。然而,它并不止于此!好像只有删除了至少一个字才停止。例如,这意味着在这里使用它:
foo(bar)
<cursor>
结果
foo(<cursor>
这真的很愚蠢(恕我直言)!我想要的行为类似于以下内容:
这看起来是一个更合理的 Ctrl-Backspace,但说实话,如果我能得到 (1),那将是一个巨大的改进。有这个包或者设置吗?我不太了解 emacs lisp,但也许可以向我指出相关 API 的位置...
我使用以下intellij风格的智能向后杀字
(defun aborn/backward-kill-word ()
"Customize/Smart backward-kill-word."
(interactive)
(let* ((cp (point))
(backword)
(end)
(space-pos)
(backword-char (if (bobp)
"" ;; cursor in begin of buffer
(buffer-substring cp (- cp 1)))))
(if (equal (length backword-char) (string-width backword-char))
(progn
(save-excursion
(setq backword (buffer-substring (point) (progn (forward-word -1) (point)))))
(setq ab/debug backword)
(save-excursion
(when (and backword ;; when backword contains space
(s-contains? " " backword))
(setq space-pos (ignore-errors (search-backward " ")))))
(save-excursion
(let* ((pos (ignore-errors (search-backward-regexp "\n")))
(substr (when pos (buffer-substring pos cp))))
(when (or (and substr (s-blank? (s-trim substr)))
(s-contains? "\n" backword))
(setq end pos))))
(if end
(kill-region cp end)
(if space-pos
(kill-region cp space-pos)
(backward-kill-word 1))))
(kill-region cp (- cp 1))) ;; word is non-english word
))
(global-set-key [C-backspace]
'aborn/backward-kill-word)
我想要的行为是 C-Backspace 能够:
这是我的实现:
(defun ryanmarcus/backward-kill-word ()
"Remove all whitespace if the character behind the cursor is whitespace, otherwise remove a word."
(interactive)
(if (looking-back "[ \n]")
;; delete horizontal space before us and then check to see if we
;; are looking at a newline
(progn (delete-horizontal-space 't)
(while (looking-back "[ \n]")
(backward-delete-char 1)))
;; otherwise, just do the normal kill word.
(backward-kill-word 1)))
Ctrl-退格键运行命令
backward-kill-word
,顾名思义,该命令将始终尝试删除前一个单词。
也许您需要 M-\ (
delete-horizontal-space
),它会删除光标周围的所有空白。无论如何,这将满足您的第一个要求。
我不久前遇到了同样的问题,并用它覆盖了 C-backspace。
;;Eclipse-like C-backspace
(defun my-kill-back ()
(interactive)
(if (bolp) ; beginnning of line, just delete 1
(backward-delete-char 1)
(if (string-match "[^[:space:]]" (buffer-substring (point-at-bol) (point)))
; There's a word on the line, delete it
(backward-kill-word 1)
(delete-region (point-at-bol) (point))))) ; all whitespace, delete it
(global-set-key [C-backspace] 'my-kill-back)
有点麻烦。例如,如果该行中的所有存在都是分号,则向后删除字可以删除太多。尽管如此,大部分工作还是完成了。
在引用的特定情况下,人们可能使用了“删除缩进”(通常绑定到 M-^),这将删除行开头和前面的换行符处的所有空格,实际上将当前行向上移动到该行多于。我发现这个命令非常有帮助,即使可能无法解决所述的确切问题。
@AbornJiang 谢谢。我做了一个小小的更改,使其行为类似于 Atom 向后删除单词的默认方式。
(when (and backword ;; when backword contains space
(s-contains? " " backword))
(setq space-pos (1+ (ignore-errors (search-backward-regexp "[[:space:]][[:word:]]")))))
此正则表达式选择一个开始 pos,删除下一个单词开头的任意数量的空格。这与 MacOS、Google Docs、Sublime 和 Atom 中的行为相同。
https://gist.github.com/jclosure/d838a672ba77482f2dcc1fc4df3368de#file-emacs-el-L447
这是一个老问题,但这是一个多年来对我很有帮助的解决方案。我喜欢它,因为它不贪婪,而且我更喜欢多次输入
C-backspace
,而不是一次删除太多内容并不得不撤消。非贪婪行为在所有情况下都很有效。
每次调用时,它都会删除以下任一内容:
(defun my-backward-kill-char-or-word ()
(interactive)
(cond
((looking-back (rx (char word)) 1)
(backward-kill-word 1))
((looking-back (rx (char blank)) 1)
(delete-horizontal-space t))
(t
(backward-delete-char 1))))
(global-set-key (kbd "<C-backspace>") 'my-backward-kill-char-or-word)
我不值得赞扬,因为我多年前在某个地方发现了它,而且不幸的是,我不记得作者是谁。
由于人们在几条评论中要求类似的向前删除功能,我只是对其进行了调整以继续工作:
(defun my-forward-kill-char-or-word ()
(interactive)
(cond
((looking-at (rx (char word)) 1)
(kill-word 1))
((looking-at (rx (char blank)) 1)
(delete-horizontal-space))
(t
(delete-forward-char 1))))
(global-set-key (kbd "M-d") 'my-forward-kill-char-or-word)