Custom macOS keybindings – Emacs and tenkeyless keyboards like Keychron K7

DefaultKeyBinding.dict

/* ~/Library/KeyBindings/DefaultKeyBinding.dict

Custom macOS keybindings – universal Emacs bindings and helpers
for tenkeyless keyboards like Keychron K7.

This file remaps the key bindings of a single user on Mac OS X.
Here is a rough cheatsheet for syntax.

Key Modifiers

^ : Ctrl
$ : Shift
~ : Option (Alt)
@ : Command (Apple)
# : Numeric Keypad

Non-Printable Key Codes

Standard
Up Arrow:     \UF700        Backspace:    \U0008        F1:           \UF704
Down Arrow:   \UF701        Tab:          \U0009        F2:           \UF705
Left Arrow:   \UF702        Escape:       \U001B        F3:           \UF706
Right Arrow:  \UF703        Enter:        \U000A        ...
Insert:       \UF727        Page Up:      \UF72C
Delete:       \UF728        Page Down:    \UF72D
Home:         \UF729        Print Screen: \UF72E
End:          \UF72B        Scroll Lock:  \UF72F
Break:        \UF732        Pause:        \UF730
SysReq:       \UF731        Menu:         \UF735
Help:         \UF746

OS X
Delete:       \U007F

For reference see:
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/EventOverview/TextDefaultsBindings/TextDefaultsBindings.html

Based on:
https://gist.github.com/trusktr/1e5e516df4e8032cbc3d
https://gist.githubusercontent.com/trusktr/1e5e516df4e8032cbc3d/raw/ab7c868a8354219782b37971f984564c66a53d78/DefaultKeyBinding.dict
*/

{
    /* Additional Emacs bindings */

    "~f" = "moveWordForward:";
    "~b" = "moveWordBackward:";
    "~<" = "moveToBeginningOfDocument:";
    "~>" = "moveToEndOfDocument:";
    "~v" = "pageUp:";
    "~d" = "deleteWordForward:";
    "~^h" = "deleteWordBackward:";
    "~\010" = "deleteWordBackward:";  /* Option-backspace */
    "~\177" = "deleteWordForward:";  /* Option-delete */

    /* Escape should really be complete: */
    "\033" = "complete:";  /* Escape */

    /* Multikey Emacs bindings */

    "\033" = {
        "\033" = "complete:";  /* ESC-ESC */
        "f" = "moveWordForward:";  /* ESC-f */
        "b" = "moveWordBackward:";  /* ESC-b */
        "<" = "moveToBeginningOfDocument:";  /* ESC-< */
        ">" = "moveToEndOfDocument:";  /* ESC-> */
        "v" = "pageUp:";  /* ESC-v */
        "d" = "deleteWordForward:";  /* ESC-d */
        "^h" = "deleteWordBackward:";  /* ESC-Ctrl-H */
        "\010" = "deleteWordBackward:";  /* ESC-backspace */
        "\177" = "deleteWordForward:";  /* ESC-delete */
    };

    /* My bindings */

    /* Keychron K7 and other tenkeyless keyboards */
    "~\UF729"  = "moveToEndOfDocument:";  /* Option + Home */

    /* Convenience */
    "@~j" = ("moveUp:","moveUp:","moveUp:","moveUp:","moveUp:","moveUp:","moveUp:","moveUp:",);  /* Cmd + Option + j */
    "@~k" = ("moveDown:","moveDown:","moveDown:","moveDown:","moveDown:","moveDown:","moveDown:","moveDown:",);  /* Cmd + Option + k */
}