8 files changed, 13 insertions, 39 deletions
diff --git a/dom/html/HTMLLabelElement.h b/dom/html/HTMLLabelElement.h
index c8385fc53..4057ffef6 100644
--- a/dom/html/HTMLLabelElement.h
+++ b/dom/html/HTMLLabelElement.h
@@ -59,8 +59,6 @@ public:
   using nsGenericHTMLElement::Focus;
   virtual void Focus(mozilla::ErrorResult& aError) override;
 
-  virtual bool IsDisabled() const override { return false; }
-
   // nsIContent
   virtual nsresult PostHandleEvent(
                      EventChainPostVisitor& aVisitor) override;
diff --git a/dom/html/HTMLObjectElement.h b/dom/html/HTMLObjectElement.h
index 4041b78a3..5226154da 100644
--- a/dom/html/HTMLObjectElement.h
+++ b/dom/html/HTMLObjectElement.h
@@ -77,8 +77,6 @@ public:
   NS_IMETHOD Reset() override;
   NS_IMETHOD SubmitNamesValues(HTMLFormSubmission *aFormSubmission) override;
 
-  virtual bool IsDisabled() const override { return false; }
-
   virtual void DoneAddingChildren(bool aHaveNotified) override;
   virtual bool IsDoneAddingChildren() override;
 
diff --git a/dom/html/HTMLOptGroupElement.cpp b/dom/html/HTMLOptGroupElement.cpp
index 8a044fbf3..9e738961d 100644
--- a/dom/html/HTMLOptGroupElement.cpp
+++ b/dom/html/HTMLOptGroupElement.cpp
@@ -53,15 +53,14 @@ HTMLOptGroupElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
   aVisitor.mCanHandle = false;
   // Do not process any DOM events if the element is disabled
   // XXXsmaug This is not the right thing to do. But what is?
-  if (HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) {
+  if (IsDisabled()) {
     return NS_OK;
   }
 
-  nsIFrame* frame = GetPrimaryFrame();
-  if (frame) {
-    const nsStyleUserInterface* uiStyle = frame->StyleUserInterface();
-    if (uiStyle->mUserInput == StyleUserInput::None ||
-        uiStyle->mUserInput == StyleUserInput::Disabled) {
+  if (nsIFrame* frame = GetPrimaryFrame()) {
+    // FIXME(emilio): This poking at the style of the frame is broken unless we
+    // flush before every event handling, which we don't really want to.
+    if (frame->StyleUserInterface()->mUserInput == StyleUserInput::None) {
       return NS_OK;
     }
   }
diff --git a/dom/html/HTMLOptGroupElement.h b/dom/html/HTMLOptGroupElement.h
index d53a2e32b..e46a6a953 100644
--- a/dom/html/HTMLOptGroupElement.h
+++ b/dom/html/HTMLOptGroupElement.h
@@ -46,10 +46,6 @@ public:
 
   virtual nsIDOMNode* AsDOMNode() override { return this; }
 
-  virtual bool IsDisabled() const override {
-    return HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
-  }
-
   bool Disabled() const
   {
     return GetBoolAttr(nsGkAtoms::disabled);
diff --git a/dom/html/HTMLOptionElement.h b/dom/html/HTMLOptionElement.h
index e220b84df..4b5e192ff 100644
--- a/dom/html/HTMLOptionElement.h
+++ b/dom/html/HTMLOptionElement.h
@@ -67,10 +67,6 @@ public:
 
   nsresult CopyInnerTo(mozilla::dom::Element* aDest);
 
-  virtual bool IsDisabled() const override {
-    return HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
-  }
-
   bool Disabled() const
   {
     return GetBoolAttr(nsGkAtoms::disabled);
diff --git a/dom/html/HTMLOutputElement.h b/dom/html/HTMLOutputElement.h
index 588262480..6b6c3f66c 100644
--- a/dom/html/HTMLOutputElement.h
+++ b/dom/html/HTMLOutputElement.h
@@ -35,8 +35,6 @@ public:
   NS_IMETHOD Reset() override;
   NS_IMETHOD SubmitNamesValues(HTMLFormSubmission* aFormSubmission) override;
 
-  virtual bool IsDisabled() const override { return false; }
-
   nsresult Clone(mozilla::dom::NodeInfo* aNodeInfo, nsINode** aResult) const override;
 
   bool ParseAttribute(int32_t aNamespaceID, nsIAtom* aAttribute,
diff --git a/dom/html/nsGenericHTMLElement.cpp b/dom/html/nsGenericHTMLElement.cpp
index 2f890325a..0c8bcc9c8 100644
--- a/dom/html/nsGenericHTMLElement.cpp
+++ b/dom/html/nsGenericHTMLElement.cpp
@@ -2109,14 +2109,6 @@ nsGenericHTMLFormElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
   return nsGenericHTMLElement::PreHandleEvent(aVisitor);
 }
 
-/* virtual */
-bool
-nsGenericHTMLFormElement::IsDisabled() const
-{
-  return HasAttr(kNameSpaceID_None, nsGkAtoms::disabled) ||
-         (mFieldSet && mFieldSet->IsDisabled());
-}
-
 void
 nsGenericHTMLFormElement::ForgetFieldSet(nsIContent* aFieldset)
 {
@@ -2308,14 +2300,13 @@ nsGenericHTMLFormElement::IsElementDisabledForEvents(EventMessage aMessage,
       break;
   }
 
-  bool disabled = IsDisabled();
-  if (!disabled && aFrame) {
-    const nsStyleUserInterface* uiStyle = aFrame->StyleUserInterface();
-    disabled = uiStyle->mUserInput == StyleUserInput::None ||
-               uiStyle->mUserInput == StyleUserInput::Disabled;
-
+  // FIXME(emilio): This poking at the style of the frame is slightly bogus
+  // unless we flush before every event, which we don't really want to do.
+  if (aFrame &&
+      aFrame->StyleUserInterface()->mUserInput == StyleUserInput::None) {
+    return true;
   }
-  return disabled;
+  return IsDisabled();
 }
 
 void
diff --git a/dom/html/nsGenericHTMLElement.h b/dom/html/nsGenericHTMLElement.h
index 72039f266..940404f93 100644
--- a/dom/html/nsGenericHTMLElement.h
+++ b/dom/html/nsGenericHTMLElement.h
@@ -817,8 +817,8 @@ public:
   /**
    * Returns the current disabled state of the element.
    */
-  virtual bool IsDisabled() const {
-    return false;
+  bool IsDisabled() const {
+    return State().HasState(NS_EVENT_STATE_DISABLED);
   }
 
   bool IsHidden() const
@@ -1222,8 +1222,6 @@ public:
   virtual nsresult PreHandleEvent(
                      mozilla::EventChainPreVisitor& aVisitor) override;
 
-  virtual bool IsDisabled() const override;
-
   /**
    * This callback is called by a fieldest on all its elements whenever its
    * disabled attribute is changed so the element knows its disabled state