让普通Mac程序也能使用emacs的键绑定
最近给mac配了一个码农神器HHKB Pro 2键盘，然后在AppCode中配置Emacs键绑定的时候发现Emacs的键绑定在Mac下不好使，搜了一下他们官方的说法，是因为AppCode以及其他JetBrain公司的产品的Emacs键绑定最初就不是给Mac设计的，所以在Mac下使用option + 字符按钮会使用系统默认设置，而不会触发编辑器的动作。
然后搜这个解决方案的时候无意中找到mac可以修改按键的键绑定，而这个改动可以应用到几乎所有使用Cocoa Text的应用程序，方法是创建 ~/Library/KeyBindings目录，编辑~/Library/KeyBindings/DefaultKeyBinding.dict文件，内容为：
/* ~/Library/KeyBindings/DefaultKeyBinding.dict */
{
/* Keybindings for emacs emulation. Compiled by Jacob Rus.
*
* This is a pretty good set, especially considering that many emacs bindings
* such as C-o, C-a, C-e, C-k, C-y, C-v, C-f, C-b, C-p, C-n, C-t, and
* perhaps a few more, are already built into the system.
*
* BEWARE:
* This file uses the Option key as a meta key. This has the side-effect
* of overriding Mac OS keybindings for the option key, which generally
* make common symbols and non-english letters.
*/
/* Ctrl shortcuts */
"^l" = "centerSelectionInVisibleArea:"; /* C-l Recenter */
"^/" = "undo:"; /* C-/ Undo */
"^_" = "undo:"; /* C-_ Undo */
"^\@" = "setMark:"; /* C-@ Set mark */
/*Edit*/
"^t" = "transpose:"; /* C-t */
"~t" = "transposeWords:"; /* M-t */
"~/" = "complete:"; /* M-/ */
"^g" = "_cancelKey:"; /* C-g */
"^a" = "moveToBeginningOfLine:"; /* C-a */
"^e" = "moveToEndOfLine:"; /* C-e */
"~w" = "copy:"; /* M-w */
"^w" = "cut:"; /* C-w */
"^k" = "deleteToEndOfLine:"; /* C-k */
"^y" = "paste:"; /* C-y */
/* Incremental search. */
/* Uncomment these lines If Incremental Search IM is installed */
/* "^s" = "ISIM_incrementalSearch:"; /* C-s Incremental search */
/* "^r" = "ISIM_reverseIncrementalSearch:"; /* C-r Reverse incremental search */
/* "^g" = "abort:"; /* C-g Abort */
/* Meta shortcuts */
"~f" = "moveWordForward:"; /* M-f Move forward word */
"~b" = "moveWordBackward:"; /* M-b Move backward word */
"~<" = "moveToBeginningOfDocument:"; /* M-< Move to beginning of document */
"~>" = "moveToEndOfDocument:"; /* M-> Move to end of document */
"~v" = "pageUp:"; /* M-v Page Up */
"~/" = "complete:"; /* M-/ Complete */
"~c" = ( "capitalizeWord:", /* M-c Capitalize */
"moveForward:",
"moveForward:");
"~u" = ( "uppercaseWord:", /* M-u Uppercase */
"moveForward:",
"moveForward:");
"~l" = ( "lowercaseWord:", /* M-l Lowercase */
"moveForward:",
"moveForward:");
"~d" = "deleteWordForward:"; /* M-d Delete word forward */
"^~h" = "deleteWordBackward:"; /* M-C-h Delete word backward */
"~\U007F" = "deleteWordBackward:"; /* M-Bksp Delete word backward */
"~t" = "transposeWords:"; /* M-t Transpose words */
"~\@" = ( "setMark:", /* M-@ Mark word */
"moveWordForward:",
"swapWithMark");
"~h" = ( "setMark:", /* M-h Mark paragraph */
"moveToEndOfParagraph:",
"swapWithMark");
/* C-x shortcuts */
"^x" = {
"u" = "undo:"; /* C-x u Undo */
"k" = "performClose:"; /* C-x k Close */
"^f" = "openDocument:"; /* C-x C-f Open (find file) */
"^x" = "swapWithMark:"; /* C-x C-x Swap with mark */
"^m" = "selectToMark:"; /* C-x C-m Select to mark*/
"^s" = "saveDocument:"; /* C-x C-s Save */
"^w" = "saveDocumentAs:"; /* C-x C-w Save as */
};
}
这里^表示Control，~表示option/meta按键，后面对应的操作是NSResponder类的selector，完整的可以参考Apple的文档。
保存后重启下电脑，或者重启下程序即可生效。
我重启了AppCode之后发现这个方法可以让AppCode的Emacs键绑定生效了，不光如此，其他程序里也可以使用emacs的键绑定了。
Last modified on 2014-08-29