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<title>CodeMirror: Emacs bindings demo</title>
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<article>
<h2>Emacs bindings demo</h2>
<form><textarea id="code" name="code">
#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;
}
</textarea></form>
<p>The emacs keybindings are enabled by
including <a href="../keymap/emacs.js">keymap/emacs.js</a> and setting
the <code>keyMap</code> option to <code>"emacs"</code>. Because
CodeMirror's internal API is quite different from Emacs, they are only
a loose approximation of actual emacs bindings, though.</p>
<p>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.</p>
<script>
CodeMirror.commands.save = function() {
var elt = editor.getWrapperElement();
elt.style.background = "#def";
setTimeout(function() { elt.style.background = ""; }, 300);
};
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
lineNumbers: true,
mode: "text/x-csrc",
keyMap: "emacs"
});
</script>
</article>