CodeMirror

Emacs bindings demo

#include "syscalls.h"

/* getchar:  simple buffered version */

int getchar(void)

{

  static char buf[BUFSIZ];

  static char *bufp = buf;

  static int n = 0;

  if (n == 0) {  /* buffer is empty */

    n = read(0, buf, sizeof buf);

    bufp = buf;

  }

  return (--n >= 0) ? (unsigned char) *bufp++ : EOF;

}

​

The emacs keybindings are enabled by including keymap/emacs.js and setting the keyMap option to "emacs". Because CodeMirror's internal API is quite different from Emacs, they are only a loose approximation of actual emacs bindings, though.

Also note that a lot of browsers disallow certain keys from being captured. For example, Chrome blocks both Ctrl-W and Ctrl-N, with the result that idiomatic use of Emacs keys will constantly close your tab or open a new window.