1 files changed, 140 insertions, 0 deletions
diff --git a/dom/html/HTMLLegendElement.cpp b/dom/html/HTMLLegendElement.cpp
new file mode 100644
index 0000000000..2f110dd6ce
--- /dev/null
+++ b/dom/html/HTMLLegendElement.cpp
@@ -0,0 +1,140 @@
+/* -*- 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/dom/HTMLLegendElement.h"
+#include "mozilla/dom/ElementBinding.h"
+#include "mozilla/dom/HTMLLegendElementBinding.h"
+#include "nsFocusManager.h"
+#include "nsIFrame.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Legend)
+
+namespace mozilla::dom {
+
+HTMLLegendElement::~HTMLLegendElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLLegendElement)
+
+nsIContent* HTMLLegendElement::GetFieldSet() const {
+  nsIContent* parent = GetParent();
+
+  if (parent && parent->IsHTMLElement(nsGkAtoms::fieldset)) {
+    return parent;
+  }
+
+  return nullptr;
+}
+
+bool HTMLLegendElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                                       const nsAString& aValue,
+                                       nsIPrincipal* aMaybeScriptedPrincipal,
+                                       nsAttrValue& aResult) {
+  // this contains center, because IE4 does
+  static const nsAttrValue::EnumTable kAlignTable[] = {
+      {"left", LegendAlignValue::Left},
+      {"right", LegendAlignValue::Right},
+      {"center", LegendAlignValue::Center},
+      {nullptr, 0}};
+
+  if (aAttribute == nsGkAtoms::align && aNamespaceID == kNameSpaceID_None) {
+    return aResult.ParseEnumValue(aValue, kAlignTable, false);
+  }
+
+  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
+                                              aMaybeScriptedPrincipal, aResult);
+}
+
+nsChangeHint HTMLLegendElement::GetAttributeChangeHint(const nsAtom* aAttribute,
+                                                       int32_t aModType) const {
+  nsChangeHint retval =
+      nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
+  if (aAttribute == nsGkAtoms::align) {
+    retval |= NS_STYLE_HINT_REFLOW;
+  }
+  return retval;
+}
+
+nsresult HTMLLegendElement::BindToTree(BindContext& aContext,
+                                       nsINode& aParent) {
+  return nsGenericHTMLElement::BindToTree(aContext, aParent);
+}
+
+void HTMLLegendElement::UnbindFromTree(bool aNullParent) {
+  nsGenericHTMLElement::UnbindFromTree(aNullParent);
+}
+
+void HTMLLegendElement::Focus(const FocusOptions& aOptions,
+                              const CallerType aCallerType,
+                              ErrorResult& aError) {
+  nsIFrame* frame = GetPrimaryFrame();
+  if (!frame) {
+    return;
+  }
+
+  if (frame->IsFocusable()) {
+    nsGenericHTMLElement::Focus(aOptions, aCallerType, aError);
+    return;
+  }
+
+  // If the legend isn't focusable, focus whatever is focusable following
+  // the legend instead, bug 81481.
+  nsFocusManager* fm = nsFocusManager::GetFocusManager();
+  if (!fm) {
+    return;
+  }
+
+  RefPtr<Element> result;
+  aError = fm->MoveFocus(nullptr, this, nsIFocusManager::MOVEFOCUS_FORWARD,
+                         nsIFocusManager::FLAG_NOPARENTFRAME |
+                             nsFocusManager::ProgrammaticFocusFlags(aOptions),
+                         getter_AddRefs(result));
+}
+
+Result<bool, nsresult> HTMLLegendElement::PerformAccesskey(
+    bool aKeyCausesActivation, bool aIsTrustedEvent) {
+  FocusOptions options;
+  ErrorResult rv;
+
+  Focus(options, CallerType::System, rv);
+  if (rv.Failed()) {
+    return Err(rv.StealNSResult());
+  }
+
+  // XXXedgar, do we need to check whether the focus is really changed?
+  return true;
+}
+
+HTMLLegendElement::LegendAlignValue HTMLLegendElement::LogicalAlign(
+    mozilla::WritingMode aCBWM) const {
+  const nsAttrValue* attr = GetParsedAttr(nsGkAtoms::align);
+  if (!attr || attr->Type() != nsAttrValue::eEnum) {
+    return LegendAlignValue::InlineStart;
+  }
+
+  auto value = static_cast<LegendAlignValue>(attr->GetEnumValue());
+  switch (value) {
+    case LegendAlignValue::Left:
+      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineStart
+                               : LegendAlignValue::InlineEnd;
+    case LegendAlignValue::Right:
+      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineEnd
+                               : LegendAlignValue::InlineStart;
+    default:
+      return value;
+  }
+}
+
+HTMLFormElement* HTMLLegendElement::GetForm() const {
+  nsCOMPtr<nsIFormControl> fieldsetControl = do_QueryInterface(GetFieldSet());
+  return fieldsetControl ? fieldsetControl->GetForm() : nullptr;
+}
+
+JSObject* HTMLLegendElement::WrapNode(JSContext* aCx,
+                                      JS::Handle<JSObject*> aGivenProto) {
+  return HTMLLegendElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom