如何在 emacs 中将键绑定到缩进/取消缩进区域? [英] How to bind keys to indent/unindent region in emacs?

问题描述

我想定义两个键绑定来缩进/取消缩进 4 个空格.

I want to define two key-bindings to indent/unindent region by 4 spaces.

hello
world
foo
bar

• 视觉选择world 和foo.
• 输入>

hello
    world
    foo
bar

<小时>

我还想将 < 绑定到非缩进区域.
我对 emacs 不熟悉，请帮忙.

---

I also want to bind < to unindent region.
I'm not familiar with emacs, please help.

推荐答案

已经有键盘快捷键:

缩进:C-u 4 C-x TAB

无缩进 C-u - 4 C-x TAB

如果您觉得太长而无法输入，您可以将以下内容放入您的 .emacs 文件中:

If you find that too long to type, you could put the following in your .emacs file:

(defun my-indent-region (N)
  (interactive "p")
  (if (use-region-p)
      (progn (indent-rigidly (region-beginning) (region-end) (* N 4))
             (setq deactivate-mark nil))
    (self-insert-command N)))

(defun my-unindent-region (N)
  (interactive "p")
  (if (use-region-p)
      (progn (indent-rigidly (region-beginning) (region-end) (* N -4))
             (setq deactivate-mark nil))
    (self-insert-command N)))

(global-set-key ">" 'my-indent-region)
(global-set-key "<" 'my-unindent-region)

使用此代码，大于(>)和小于(<)键将将标记区域缩进/取消缩进 4 个空格.

With this code the greater than (>) and less than (<) keys will indent/unindent a marked region by 4 spaces each.

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