CodeMirror: Emacs bindings demo

## 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.