1 files changed, 74 insertions, 0 deletions
diff --git a/dom/html/HTMLBRElement.h b/dom/html/HTMLBRElement.h
new file mode 100644
index 0000000000..e8aa735157
--- /dev/null
+++ b/dom/html/HTMLBRElement.h
@@ -0,0 +1,74 @@
+/* -*- 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_HTMLBRElement_h
+#define mozilla_dom_HTMLBRElement_h
+
+#include "mozilla/Attributes.h"
+#include "nsGenericHTMLElement.h"
+#include "nsGkAtoms.h"
+
+namespace mozilla::dom {
+
+#define BR_ELEMENT_FLAG_BIT(n_) \
+  NODE_FLAG_BIT(HTML_ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
+
+// BR element specific bits
+enum {
+  // NS_PADDING_FOR_EMPTY_EDITOR is set if the <br> element is created by
+  // editor for placing caret at proper position in empty editor.
+  NS_PADDING_FOR_EMPTY_EDITOR = BR_ELEMENT_FLAG_BIT(0),
+
+  // NS_PADDING_FOR_EMPTY_LAST_LINE is set if the <br> element is created by
+  // editor for placing caret at proper position for making empty last line
+  // in a block or <textarea> element visible.
+  NS_PADDING_FOR_EMPTY_LAST_LINE = BR_ELEMENT_FLAG_BIT(1),
+};
+
+ASSERT_NODE_FLAGS_SPACE(HTML_ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
+
+class HTMLBRElement final : public nsGenericHTMLElement {
+ public:
+  explicit HTMLBRElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+
+  NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLBRElement, br)
+
+  bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                      const nsAString& aValue,
+                      nsIPrincipal* aMaybeScriptedPrincipal,
+                      nsAttrValue& aResult) override;
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
+  nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
+  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
+
+  bool Clear() const { return GetBoolAttr(nsGkAtoms::clear); }
+  void SetClear(const nsAString& aClear, ErrorResult& aError) {
+    return SetHTMLAttr(nsGkAtoms::clear, aClear, aError);
+  }
+  void GetClear(DOMString& aClear) const {
+    return GetHTMLAttr(nsGkAtoms::clear, aClear);
+  }
+
+  JSObject* WrapNode(JSContext* aCx,
+                     JS::Handle<JSObject*> aGivenProto) override;
+
+  bool IsPaddingForEmptyEditor() const {
+    return HasFlag(NS_PADDING_FOR_EMPTY_EDITOR);
+  }
+  bool IsPaddingForEmptyLastLine() const {
+    return HasFlag(NS_PADDING_FOR_EMPTY_LAST_LINE);
+  }
+
+ private:
+  virtual ~HTMLBRElement();
+
+  static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
+                                    MappedDeclarations&);
+};
+
+}  // namespace mozilla::dom
+
+#endif