1 files changed, 22 insertions, 0 deletions
diff --git a/lib/keyboardUtils.js b/lib/keyboardUtils.js
index fe3dcd59..5b8b4c84 100644
--- a/lib/keyboardUtils.js
+++ b/lib/keyboardUtils.js
@@ -61,3 +61,25 @@ function isEscape(event) {
   return event.keyCode == keyCodes.ESC ||
     (event.ctrlKey && getKeyChar(event) == '['); // c-[ is mapped to ESC in Vim by default.
 }
+
+var KeyPressListener = function(handlers) {
+  this.handlers = handlers; 
+}
+
+KeyPressListener.prototype = {
+  enable: function() {
+    var handlers = this.handlers;
+    var wrapper = function(callback){
+      return function(event) {
+        callback(event)
+      }
+    }
+    (handlers.keyDown && document.addEventListener("keydown", handlers.keyDown, true));
+    (handlers.keyUp && document.addEventListener("keyup", handlers.keyUp, true));
+  },
+  disable: function() {
+    var handlers = this.handlers;
+    (handlers.keyDown && document.removeEventListener("keydown", handlers.keyDown, true));
+    (handlers.keyUp && document.removeEventListener("keyup", handlers.keyUp, true));
+  }
+}