1 files changed, 100 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmoFrame.h b/layout/mathml/nsMathMLmoFrame.h
new file mode 100644
index 0000000000..2dec3e2e9b
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+++ b/layout/mathml/nsMathMLmoFrame.h
@@ -0,0 +1,100 @@
+/* -*- 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 nsMathMLmoFrame_h___
+#define nsMathMLmoFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLTokenFrame.h"
+#include "nsMathMLChar.h"
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+//
+// <mo> -- operator, fence, or separator
+//
+
+class nsMathMLmoFrame final : public nsMathMLTokenFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmoFrame)
+
+  friend nsIFrame* NS_NewMathMLmoFrame(mozilla::PresShell* aPresShell,
+                                       ComputedStyle* aStyle);
+
+  eMathMLFrameType GetMathMLFrameType() override;
+
+  void DidSetComputedStyle(ComputedStyle* aOldStyle) override;
+
+  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                        const nsDisplayListSet& aLists) override;
+
+  NS_IMETHOD
+  InheritAutomaticData(nsIFrame* aParent) override;
+
+  NS_IMETHOD
+  TransmitAutomaticData() override;
+
+  void SetInitialChildList(ChildListID aListID,
+                           nsFrameList&& aChildList) override;
+
+  virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus& aStatus) override;
+
+  virtual nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
+                         ReflowOutput& aDesiredSize) override;
+
+  virtual void MarkIntrinsicISizesDirty() override;
+
+  virtual void GetIntrinsicISizeMetrics(gfxContext* aRenderingContext,
+                                        ReflowOutput& aDesiredSize) override;
+
+  virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                                    int32_t aModType) override;
+
+  // This method is called by the parent frame to ask <mo>
+  // to stretch itself.
+  NS_IMETHOD
+  Stretch(DrawTarget* aDrawTarget, nsStretchDirection aStretchDirection,
+          nsBoundingMetrics& aContainerSize,
+          ReflowOutput& aDesiredStretchSize) override;
+
+  virtual nsresult ChildListChanged(int32_t aModType) override {
+    ProcessTextData();
+    return nsMathMLContainerFrame::ChildListChanged(aModType);
+  }
+
+ protected:
+  explicit nsMathMLmoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+      : nsMathMLTokenFrame(aStyle, aPresContext, kClassID),
+        mFlags(0),
+        mMinSize(0),
+        mMaxSize(0) {}
+  virtual ~nsMathMLmoFrame();
+
+  nsMathMLChar
+      mMathMLChar;  // Here is the MathMLChar that will deal with the operator.
+  nsOperatorFlags mFlags;
+  float mMinSize;
+  float mMaxSize;
+
+  bool UseMathMLChar();
+
+  // overload the base method so that we can setup our nsMathMLChar
+  void ProcessTextData();
+
+  // helper to get our 'form' and lookup in the Operator Dictionary to fetch
+  // our default data that may come from there, and to complete the setup
+  // using attributes that we may have
+  void ProcessOperatorData();
+
+  // helper to double check thar our char should be rendered as a selected char
+  bool IsFrameInSelection(nsIFrame* aFrame);
+};
+
+#endif /* nsMathMLmoFrame_h___ */