什么是emacs中的好的自定义键绑定？ [英] What are good custom keybindings in emacs?

问题描述

Emacs似乎已经在所有可能的键盘组合中随机分配了它们的命令。 ：p

如果我要定义新的键盘快捷键，我应该放在哪里？我应该使用哪些前缀？

例如：我想为以下功能定义快捷方式：

• indent-buffer（Cc i，得到答案后）


• comment-or-uncomment-region（Cc C）


• rdebug（ruby debugger）（Cc R）


• rsense-complete（ruby autocomplete）（Cc e）

你会把这些放在哪里？为什么？

解决方案

Emacs实际上具有非常明确的绑定模式，这个答案显示了一些。

至于你应该定义键，如果您查看文档约定，您将看到 Cc a （其中 a 是任何大写或大写字符）为用户保留。

另外，如果您正在定义一个真正只在特定模式下有意义的键，那么您应该在该键盘映射中定义它。

例如， M - / 绑定到 dabbrev-expand ，这是一个方便的方式来自动填写你输入的单词。使用 rsense-complete 可能非常有用，但是当您使用红宝石时，只能使用。在这种情况下，您可以这样做：

 （add-hook'ruby-mode-hook 
（lambda ）（define-key ruby​​-mode-map（kbdM- /）'rsense-complete）））
  

只有当您在 ruby​​-mode 中时，它将覆盖 M - / 的绑定，并保持不变（或可用）其余的模式。

Emacs seems to have all the possible keyboard combinations already randomly distributed among it's commands. :p

If I am to define new keyboard shortcuts, where should I put them? Which prefixes should I use?

For instance: I want to define shortcuts for the following functions:

• indent-buffer (C-c i, after I got the answer)
• comment-or-uncomment-region (C-c C)
• rdebug (ruby debugger) (C-c R)
• rsense-complete (ruby autocomplete) (C-c e)

Where would you put these? Why?

解决方案

Emacs actually has a very definite pattern to its bindings, this answer shows some.

As far as where you should define keys, if you take a look at the documentation for conventions, you'll see that C-c a (where a is any lower or upper case character) is reserved for users.

Plus, if you're defining a key that really only makes sense in a particular mode, then you should define it in that keymap.

For example, M-/ is bound to dabbrev-expand, which is a handy way of autocompleting the word you're typing. It might very well make sense to use rsense-complete instead, but only when you're in ruby. In which case, you can do this:

(add-hook 'ruby-mode-hook
     (lambda () (define-key ruby-mode-map (kbd "M-/") 'rsense-complete)))

That will override the binding for M-/ only when you're in ruby-mode, and leave it unchanged (or available) for the rest of the modes.

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