From 4adf502846bbbce947afa7cb94bbd80ba003eedb Mon Sep 17 00:00:00 2001
From: Sylvester Willis <sylvester.lee.willis@gmail.com>
Date: Sat, 7 Nov 2015 02:07:12 -0500
Subject: [PATCH] Added call to event.PreventDefault on html text inputs and
 textareas. This change should prevent page scrolling when up/down buttons are
 pressed.

---
 components/script/dom/htmlinputelement.rs    | 1 +
 components/script/dom/htmltextareaelement.rs | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index ed409907b42..ff4492a5520 100644
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -656,6 +656,7 @@ impl VirtualMethods for HTMLInputElement {
                         }
                         RedrawSelection => {
                             self.force_relayout();
+                            event.PreventDefault();
                         }
                         Nothing => (),
                     }
diff --git a/components/script/dom/htmltextareaelement.rs b/components/script/dom/htmltextareaelement.rs
index f9735e76c15..9b3f50bf91e 100644
--- a/components/script/dom/htmltextareaelement.rs
+++ b/components/script/dom/htmltextareaelement.rs
@@ -352,9 +352,11 @@ impl VirtualMethods for HTMLTextAreaElement {
                         }
 
                         self.force_relayout();
+                        event.PreventDefault();
                     }
                     KeyReaction::RedrawSelection => {
                         self.force_relayout();
+                        event.PreventDefault();
                     }
                     KeyReaction::Nothing => (),
                 }