Auto merge of #5592 - mbrubeck:focusable, r=jdm

This begins implementing parts of the [focusing steps](https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps) algorithm. r? @jdm or @Ms2ger

1 files changed, 4 insertions, 2 deletions

diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs
index ca4182164d8..57cee418838 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -36,7 +36,7 @@ use dom::documentfragment::DocumentFragment;
 use dom::documenttype::DocumentType;
 use dom::domimplementation::DOMImplementation;
 use dom::element::{Element, ElementCreator, AttributeHandlers};
-use dom::element::{ElementTypeId, ActivationElementHelpers};
+use dom::element::{ElementTypeId, ActivationElementHelpers, FocusElementHelpers};
 use dom::event::{Event, EventBubbles, EventCancelable, EventHelpers};
 use dom::eventtarget::{EventTarget, EventTargetTypeId, EventTargetHelpers};
 use dom::htmlanchorelement::HTMLAnchorElement;
@@ -448,7 +448,9 @@ impl<'a> DocumentHelpers<'a> for JSRef<'a, Document> {
 
     /// Request that the given element receive focus once the current transaction is complete.
     fn request_focus(self, elem: JSRef<Element>) {
-        self.possibly_focused.assign(Some(elem))
+        if elem.is_focusable_area() {
+            self.possibly_focused.assign(Some(elem))
+        }
     }
 
     /// Reassign the focus context to the element that last requested focus during this