1 files changed, 45 insertions, 0 deletions
diff --git a/layout/base/nsStyleChangeList.h b/layout/base/nsStyleChangeList.h
new file mode 100644
index 0000000000..c5d12c73e4
--- /dev/null
+++ b/layout/base/nsStyleChangeList.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/*
+ * a list of the recomputation that needs to be done in response to a
+ * style change
+ */
+
+#ifndef nsStyleChangeList_h___
+#define nsStyleChangeList_h___
+
+#include "mozilla/Attributes.h"
+
+#include "nsChangeHint.h"
+#include "nsCOMPtr.h"
+
+class nsIFrame;
+class nsIContent;
+
+struct nsStyleChangeData
+{
+  nsIFrame* mFrame; // weak
+  nsCOMPtr<nsIContent> mContent;
+  nsChangeHint mHint;
+};
+
+class nsStyleChangeList : private AutoTArray<nsStyleChangeData, 10>
+{
+  typedef AutoTArray<nsStyleChangeData, 10> base_type;
+  nsStyleChangeList(const nsStyleChangeList&) = delete;
+
+public:
+  using base_type::begin;
+  using base_type::end;
+  using base_type::IsEmpty;
+  using base_type::Clear;
+
+  nsStyleChangeList() { MOZ_COUNT_CTOR(nsStyleChangeList); }
+  ~nsStyleChangeList() { MOZ_COUNT_DTOR(nsStyleChangeList); }
+  void AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
+};
+
+#endif /* nsStyleChangeList_h___ */