let's deploy this.

components/decorators/keyhandling-decorator.jsx

@@ -0,0 +1,33 @@
+var React = require("react");
+var noop = require("../../lib/noop");
+
+module.exports = function(Component) {
+  var options = Component.keyHandlingOptions,
+      propName = options.propName || "",
+      values = options.values || {},
+      controller = options.controller || noop,
+      getDefaultProps = Component.getDefaultProps;
+
+  return React.createClass({
+    values: values,
+
+    getDefaultProps: getDefaultProps,
+
+    onKeyDown: function(event, api) {
+      var v = this.values[event.keyCode];
+      if(v) {
+        event.preventDefault();
+        if (typeof v === "function") {
+          v(api);
+        } else {
+          api[propName] += v;
+          controller(api);
+        }
+      }
+    },
+
+    render: function() {
+      return <Component {...this.props} onKeyDown={this.onKeyDown} />;
+    }
+  });
+};