1 files changed, 95 insertions, 0 deletions
diff --git a/dom/html/HTMLLegendElement.h b/dom/html/HTMLLegendElement.h
new file mode 100644
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+++ b/dom/html/HTMLLegendElement.h
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+/* -*- 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/. */
+
+#ifndef mozilla_dom_HTMLLegendElement_h
+#define mozilla_dom_HTMLLegendElement_h
+
+#include "mozilla/Attributes.h"
+#include "nsGenericHTMLElement.h"
+#include "mozilla/dom/HTMLFormElement.h"
+
+namespace mozilla::dom {
+
+class HTMLLegendElement final : public nsGenericHTMLElement {
+ public:
+  explicit HTMLLegendElement(
+      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+      : nsGenericHTMLElement(std::move(aNodeInfo)) {}
+
+  NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLLegendElement, legend)
+
+  using nsGenericHTMLElement::Focus;
+  virtual void Focus(const FocusOptions& aOptions,
+                     const mozilla::dom::CallerType aCallerType,
+                     ErrorResult& aError) override;
+
+  virtual Result<bool, nsresult> PerformAccesskey(
+      bool aKeyCausesActivation, bool aIsTrustedEvent) override;
+
+  // nsIContent
+  virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
+  virtual void UnbindFromTree(bool aNullParent = true) override;
+  virtual bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                              const nsAString& aValue,
+                              nsIPrincipal* aMaybeScriptedPrincipal,
+                              nsAttrValue& aResult) override;
+  virtual nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
+                                              int32_t aModType) const override;
+
+  virtual nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
+
+  enum class LegendAlignValue : uint8_t {
+    Left,
+    Right,
+    Center,
+    Bottom,
+    Top,
+    InlineStart,
+    InlineEnd,
+  };
+
+  /**
+   * Return the align value to use for the given fieldset writing-mode.
+   * (This method resolves Left/Right to the appropriate InlineStart/InlineEnd).
+   * @param aCBWM the fieldset writing-mode
+   * @note we only parse left/right/center, so this method returns Center,
+   * InlineStart or InlineEnd.
+   */
+  LegendAlignValue LogicalAlign(mozilla::WritingMode aCBWM) const;
+
+  /**
+   * WebIDL Interface
+   */
+
+  HTMLFormElement* GetForm() const;
+
+  void GetAlign(DOMString& aAlign) { GetHTMLAttr(nsGkAtoms::align, aAlign); }
+
+  void SetAlign(const nsAString& aAlign, ErrorResult& aError) {
+    SetHTMLAttr(nsGkAtoms::align, aAlign, aError);
+  }
+
+  nsINode* GetScopeChainParent() const override {
+    Element* form = GetForm();
+    return form ? form : nsGenericHTMLElement::GetScopeChainParent();
+  }
+
+ protected:
+  virtual ~HTMLLegendElement();
+
+  virtual JSObject* WrapNode(JSContext* aCx,
+                             JS::Handle<JSObject*> aGivenProto) override;
+
+  /**
+   * Get the fieldset content element that contains this legend.
+   * Returns null if there is no fieldset containing this legend.
+   */
+  nsIContent* GetFieldSet() const;
+};
+
+}  // namespace mozilla::dom
+
+#endif /* mozilla_dom_HTMLLegendElement_h */