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gaia/dev_apps/uitest-privileged/js/API/keyevent_customization.js

@@ -0,0 +1,41 @@
+'use stricts';
+
+(function() {
+
+  function $(id) {
+    return document.getElementById(id);
+  }
+
+  var keyEventCustomization = {
+    init: function ke_init() {
+      window.addEventListener('keydown', this);
+      window.addEventListener('keyup', this);
+    },
+
+    handleEvent: function ke_handleEvent(e) {
+      // We shows event information at received-event.
+      $('received-event').textContent = e.key + ' ' + e.type;
+      switch(e.key) {
+        case 'VolumeDown':
+        case 'VolumeUp':
+          if ($('override-volume-keys').checked) {
+            $('received-event').textContent += ' default prevented';
+            // if override keys is checked, we should prevent default.
+            e.preventDefault();
+          }
+          break;
+        case 'Power':
+        case 'Exit':
+        case 'Home':
+          if ($('override-power-exit-keys').checked) {
+            $('received-event').textContent += ' default prevented';
+            // if override keys is checked, we should prevent default.
+            e.preventDefault();
+          }
+          break;
+      }
+    }
+  };
+
+  keyEventCustomization.init();
+})();