1 files changed, 115 insertions, 0 deletions

diff --git a/dom/html/HTMLOptGroupElement.cpp b/dom/html/HTMLOptGroupElement.cpp
new file mode 100644
index 0000000000..9a160b430c
--- /dev/null
+++ b/dom/html/HTMLOptGroupElement.cpp
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/dom/HTMLOptGroupElement.h"
+#include "mozilla/dom/HTMLOptGroupElementBinding.h"
+#include "mozilla/dom/HTMLSelectElement.h"  // SafeOptionListMutation
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+#include "nsIFrame.h"
+#include "nsIFormControlFrame.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(OptGroup)
+
+namespace mozilla::dom {
+
+/**
+ * The implementation of <optgroup>
+ */
+
+HTMLOptGroupElement::HTMLOptGroupElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : nsGenericHTMLElement(std::move(aNodeInfo)) {
+  // We start off enabled
+  AddStatesSilently(ElementState::ENABLED);
+}
+
+HTMLOptGroupElement::~HTMLOptGroupElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLOptGroupElement)
+
+void HTMLOptGroupElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
+  aVisitor.mCanHandle = false;
+
+  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->StyleUI()->UserInput() == StyleUserInput::None) {
+      return;
+    }
+  }
+
+  nsGenericHTMLElement::GetEventTargetParent(aVisitor);
+}
+
+Element* HTMLOptGroupElement::GetSelect() {
+  Element* parent = nsINode::GetParentElement();
+  if (!parent || !parent->IsHTMLElement(nsGkAtoms::select)) {
+    return nullptr;
+  }
+  return parent;
+}
+
+void HTMLOptGroupElement::InsertChildBefore(nsIContent* aKid,
+                                            nsIContent* aBeforeThis,
+                                            bool aNotify, ErrorResult& aRv) {
+  const uint32_t index =
+      aBeforeThis ? *ComputeIndexOf(aBeforeThis) : GetChildCount();
+  SafeOptionListMutation safeMutation(GetSelect(), this, aKid, index, aNotify);
+  nsGenericHTMLElement::InsertChildBefore(aKid, aBeforeThis, aNotify, aRv);
+  if (aRv.Failed()) {
+    safeMutation.MutationFailed();
+  }
+}
+
+void HTMLOptGroupElement::RemoveChildNode(nsIContent* aKid, bool aNotify) {
+  SafeOptionListMutation safeMutation(GetSelect(), this, nullptr,
+                                      *ComputeIndexOf(aKid), aNotify);
+  nsGenericHTMLElement::RemoveChildNode(aKid, aNotify);
+}
+
+void HTMLOptGroupElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+                                       const nsAttrValue* aValue,
+                                       const nsAttrValue* aOldValue,
+                                       nsIPrincipal* aSubjectPrincipal,
+                                       bool aNotify) {
+  if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::disabled) {
+    ElementState disabledStates;
+    if (aValue) {
+      disabledStates |= ElementState::DISABLED;
+    } else {
+      disabledStates |= ElementState::ENABLED;
+    }
+
+    ElementState oldDisabledStates = State() & ElementState::DISABLED_STATES;
+    ElementState changedStates = disabledStates ^ oldDisabledStates;
+
+    if (!changedStates.IsEmpty()) {
+      ToggleStates(changedStates, aNotify);
+
+      // All our children <option> have their :disabled state depending on our
+      // disabled attribute. We should make sure their state is updated.
+      for (nsIContent* child = nsINode::GetFirstChild(); child;
+           child = child->GetNextSibling()) {
+        if (auto optElement = HTMLOptionElement::FromNode(child)) {
+          optElement->OptGroupDisabledChanged(true);
+        }
+      }
+    }
+  }
+
+  return nsGenericHTMLElement::AfterSetAttr(
+      aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+JSObject* HTMLOptGroupElement::WrapNode(JSContext* aCx,
+                                        JS::Handle<JSObject*> aGivenProto) {
+  return HTMLOptGroupElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom