1 files changed, 61 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmspaceFrame.h b/layout/mathml/nsMathMLmspaceFrame.h
new file mode 100644
index 0000000000..d0692d2dfe
--- /dev/null
+++ b/layout/mathml/nsMathMLmspaceFrame.h
@@ -0,0 +1,61 @@
+/* -*- 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 nsMathMLmspaceFrame_h___
+#define nsMathMLmspaceFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLContainerFrame.h"
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+//
+// <mspace> -- space
+//
+
+class nsMathMLmspaceFrame final : public nsMathMLContainerFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
+
+  friend nsIFrame* NS_NewMathMLmspaceFrame(mozilla::PresShell* aPresShell,
+                                           ComputedStyle* aStyle);
+
+  NS_IMETHOD
+  TransmitAutomaticData() override {
+    // The REC defines the following elements to be space-like:
+    // * an mtext, mspace, maligngroup, or malignmark element;
+    mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
+    return NS_OK;
+  }
+
+  virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus& aStatus) override;
+
+ protected:
+  explicit nsMathMLmspaceFrame(ComputedStyle* aStyle,
+                               nsPresContext* aPresContext)
+      : nsMathMLContainerFrame(aStyle, aPresContext, kClassID),
+        mWidth(0),
+        mHeight(0),
+        mDepth(0) {}
+  virtual ~nsMathMLmspaceFrame();
+
+  virtual nsresult MeasureForWidth(DrawTarget* aDrawTarget,
+                                   ReflowOutput& aDesiredSize) override;
+
+ private:
+  nscoord mWidth;
+  nscoord mHeight;
+  nscoord mDepth;
+
+  // helper method to initialize our member data
+  void ProcessAttributes(nsPresContext* aPresContext);
+};
+
+#endif /* nsMathMLmspaceFrame_h___ */