1 files changed, 99 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmpaddedFrame.h b/layout/mathml/nsMathMLmpaddedFrame.h
new file mode 100644
index 0000000000..ac2f1480c2
--- /dev/null
+++ b/layout/mathml/nsMathMLmpaddedFrame.h
@@ -0,0 +1,99 @@
+/* -*- 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 nsMathMLmpaddedFrame_h___
+#define nsMathMLmpaddedFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsCSSValue.h"
+#include "nsMathMLContainerFrame.h"
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+//
+// <mpadded> -- adjust space around content
+//
+
+class nsMathMLmpaddedFrame final : public nsMathMLContainerFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmpaddedFrame)
+
+  friend nsIFrame* NS_NewMathMLmpaddedFrame(mozilla::PresShell* aPresShell,
+                                            ComputedStyle* aStyle);
+
+  NS_IMETHOD
+  InheritAutomaticData(nsIFrame* aParent) override;
+
+  NS_IMETHOD
+  TransmitAutomaticData() override {
+    return TransmitAutomaticDataForMrowLikeElement();
+  }
+
+  virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus& aStatus) override;
+
+  virtual nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
+                         ReflowOutput& aDesiredSize) override;
+
+  bool IsMrowLike() override {
+    return mFrames.FirstChild() != mFrames.LastChild() || !mFrames.FirstChild();
+  }
+
+ protected:
+  explicit nsMathMLmpaddedFrame(ComputedStyle* aStyle,
+                                nsPresContext* aPresContext)
+      : nsMathMLContainerFrame(aStyle, aPresContext, kClassID),
+        mWidthSign(0),
+        mHeightSign(0),
+        mDepthSign(0),
+        mLeadingSpaceSign(0),
+        mVerticalOffsetSign(0),
+        mWidthPseudoUnit(0),
+        mHeightPseudoUnit(0),
+        mDepthPseudoUnit(0),
+        mLeadingSpacePseudoUnit(0),
+        mVerticalOffsetPseudoUnit(0) {}
+
+  virtual ~nsMathMLmpaddedFrame();
+
+  virtual nsresult MeasureForWidth(DrawTarget* aDrawTarget,
+                                   ReflowOutput& aDesiredSize) override;
+
+ private:
+  nsCSSValue mWidth;
+  nsCSSValue mHeight;
+  nsCSSValue mDepth;
+  nsCSSValue mLeadingSpace;
+  nsCSSValue mVerticalOffset;
+
+  int32_t mWidthSign;
+  int32_t mHeightSign;
+  int32_t mDepthSign;
+  int32_t mLeadingSpaceSign;
+  int32_t mVerticalOffsetSign;
+
+  int32_t mWidthPseudoUnit;
+  int32_t mHeightPseudoUnit;
+  int32_t mDepthPseudoUnit;
+  int32_t mLeadingSpacePseudoUnit;
+  int32_t mVerticalOffsetPseudoUnit;
+
+  // helpers to process the attributes
+  void ProcessAttributes();
+
+  bool ParseAttribute(nsString& aString, int32_t& aSign, nsCSSValue& aCSSValue,
+                      int32_t& aPseudoUnit);
+
+  void UpdateValue(int32_t aSign, int32_t aPseudoUnit,
+                   const nsCSSValue& aCSSValue,
+                   const ReflowOutput& aDesiredSize, nscoord& aValueToUpdate,
+                   float aFontSizeInflation) const;
+};
+
+#endif /* nsMathMLmpaddedFrame_h___ */