1 files changed, 67 insertions, 0 deletions
diff --git a/layout/generic/DetailsFrame.h b/layout/generic/DetailsFrame.h
new file mode 100644
index 0000000000..f2b8e1be51
--- /dev/null
+++ b/layout/generic/DetailsFrame.h
@@ -0,0 +1,67 @@
+/* -*- 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 DetailsFrame_h
+#define DetailsFrame_h
+
+#include "nsBlockFrame.h"
+#include "nsIAnonymousContentCreator.h"
+
+class nsContainerFrame;
+
+namespace mozilla {
+
+// DetailsFrame is generated by HTMLDetailsElement. See
+// nsCSSFrameConstructor::ConstructDetailsFrame for the structure of a
+// DetailsFrame.
+//
+class DetailsFrame final : public nsBlockFrame,
+                           public nsIAnonymousContentCreator {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(DetailsFrame)
+  NS_DECL_QUERYFRAME
+
+  explicit DetailsFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+
+  virtual ~DetailsFrame();
+
+#ifdef DEBUG_FRAME_DUMP
+  nsresult GetFrameName(nsAString& aResult) const override {
+    return MakeFrameName(u"Details"_ns, aResult);
+  }
+#endif
+
+#ifdef DEBUG
+  // Check the frame of the main summary element is the first child in the frame
+  // list. Returns true if we found the main summary frame; false otherwise.
+  bool CheckValidMainSummary(const nsFrameList& aFrameList) const;
+#endif
+
+  void SetInitialChildList(ChildListID aListID,
+                           nsFrameList& aChildList) override;
+
+  void DestroyFrom(nsIFrame* aDestructRoot,
+                   PostDestroyData& aPostDestroyData) override;
+
+  // nsIAnonymousContentCreator
+  nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
+
+  void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                uint32_t aFilter) override;
+  // Returns true if |aSummaryFrame| is the main summary (i.e. the first child
+  // of this details frame).
+  // This function is used when the summary element is removed from the parent
+  // details element since at that moment the summary element has been already
+  // removed from the details element children.
+  bool HasMainSummaryFrame(nsIFrame* aSummaryFrame);
+
+ private:
+  nsCOMPtr<nsIContent> mDefaultSummary;
+};
+
+}  // namespace mozilla
+
+#endif  // DetailsFrame_h