问题描述
是否可以通过 VT100/xterm 终端(Mac OS X 终端)以任何方式将密钥C-("发送到 Emacs?是否有可以发送的转义序列来实现等效?
Is it possible in any way to send the key "C-(" to Emacs over a VT100/xterm terminal (Mac OS X Terminal)? Is there an escape sequence that could be sent to achieve the equivalent?
我怀疑根本问题是不存在将控制与字符("(以及其他使用 shift 产生的此类字符)组合在一起的概念.
I suspect the fundamental problem is that the concept of combining control with the character "(" (and other such characters that are produced using shift) does not exist.
注意:使用 Cocoa Emacs 不是一种选择.需要C-("的原因是 paredit.el 在其他组合键中使用它，最好不要重新映射它(因为将它放在C-(") 上是有意义的.
Note: Using Cocoa Emacs is not an option. And the reason for needing "C-(" is that paredit.el uses it amongst other key combinations, and it would be preferable to not remap it (because it makes sense to have it on "C-(").
推荐答案
VT100 终端不能这样做，因为没有 ^( 对应于 ( 控制字符>. 但是，xterm 有所谓的modifyOtherKeys"模式，它允许为这样的组合发送唯一的键码.
A VT100 terminal couldn't do that, because there is no ^( control character corresponding to (. However, xterm has the so-called "modifyOtherKeys" mode, which does allow to send unique keycodes for combinations like that.
要启用它，请设置 modifyOtherKeys 资源，例如在 ~/.Xdefaults 中:
To enable it, set the modifyOtherKeys resource, e.g. in ~/.Xdefaults:
XTerm*vt100.modifyOtherKeys: 1
这样，Ctrl+( 将发送以下键码:
With that, Ctrl+( will send the following keycode:
^[[27;6;40~
虽然这很长，所以引入了另一种类似的键码格式，可以通过设置 formatOtherKeys 资源来启用:
That's rather long though, so another format for keycodes like that was introduced, which can be enabled by setting the formatOtherKeys resource:
XTerm*vt100.formatOtherKeys: 1
这样，Ctrl+( 发送:
With that, Ctrl+( sends:
^[[40;6u
在这两个键码中，40 是 ( 的十进制 ASCII 码，6 代表 Ctrl.
In both of these keycodes, the 40 is the decimal ASCII code for (, and the 6 represents the Ctrl.
参见 man xterm 和 http://invisible-island.net/xterm/ctlseqs/ctlseqs.html 了解更多详情.不知道 Terminal.app 是否支持.
See man xterm and http://invisible-island.net/xterm/ctlseqs/ctlseqs.html for further details. No idea whether Terminal.app supports any of it.
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