From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 layout/mathml/nsMathMLmencloseFrame.h | 126 ++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 layout/mathml/nsMathMLmencloseFrame.h

(limited to 'layout/mathml/nsMathMLmencloseFrame.h')

diff --git a/layout/mathml/nsMathMLmencloseFrame.h b/layout/mathml/nsMathMLmencloseFrame.h
new file mode 100644
index 0000000000..82d73b2cfc
--- /dev/null
+++ b/layout/mathml/nsMathMLmencloseFrame.h
@@ -0,0 +1,126 @@
+/* -*- 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/. */
+
+
+#ifndef nsMathMLmencloseFrame_h___
+#define nsMathMLmencloseFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLContainerFrame.h"
+
+//
+// <menclose> -- enclose content with a stretching symbol such
+// as a long division sign.
+//
+
+/*
+  The MathML REC describes:
+
+  The menclose element renders its content inside the enclosing notation
+  specified by its notation attribute. menclose accepts any number of arguments;
+  if this number is not 1, its contents are treated as a single "inferred mrow"
+  containing its arguments, as described in Section 3.1.3 Required Arguments. 
+*/
+
+enum nsMencloseNotation
+  {
+    NOTATION_LONGDIV = 0x1,
+    NOTATION_RADICAL = 0x2,
+    NOTATION_ROUNDEDBOX = 0x4,
+    NOTATION_CIRCLE = 0x8,
+    NOTATION_LEFT = 0x10,
+    NOTATION_RIGHT = 0x20,
+    NOTATION_TOP = 0x40,
+    NOTATION_BOTTOM = 0x80,
+    NOTATION_UPDIAGONALSTRIKE = 0x100,
+    NOTATION_DOWNDIAGONALSTRIKE = 0x200,
+    NOTATION_VERTICALSTRIKE = 0x400,
+    NOTATION_HORIZONTALSTRIKE = 0x800,
+    NOTATION_UPDIAGONALARROW = 0x1000,
+    NOTATION_PHASORANGLE = 0x2000
+  };
+
+class nsMathMLmencloseFrame : public nsMathMLContainerFrame {
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  friend nsIFrame* NS_NewMathMLmencloseFrame(nsIPresShell*   aPresShell,
+                                             nsStyleContext* aContext);
+  
+  virtual nsresult
+  Place(DrawTarget*          aDrawTarget,
+        bool                 aPlaceOrigin,
+        ReflowOutput& aDesiredSize) override;
+  
+  virtual nsresult
+  MeasureForWidth(DrawTarget* aDrawTarget,
+                  ReflowOutput& aDesiredSize) override;
+  
+  virtual nsresult
+  AttributeChanged(int32_t         aNameSpaceID,
+                   nsIAtom*        aAttribute,
+                   int32_t         aModType) override;
+  
+  virtual void
+  SetAdditionalStyleContext(int32_t          aIndex, 
+                            nsStyleContext*  aStyleContext) override;
+  virtual nsStyleContext*
+  GetAdditionalStyleContext(int32_t aIndex) const override;
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+
+  NS_IMETHOD
+  InheritAutomaticData(nsIFrame* aParent) override;
+
+  NS_IMETHOD
+  TransmitAutomaticData() override;
+
+  virtual nscoord
+  FixInterFrameSpacing(ReflowOutput& aDesiredSize) override;
+
+  bool
+  IsMrowLike() override {
+    return mFrames.FirstChild() != mFrames.LastChild() ||
+           !mFrames.FirstChild();
+  }
+
+protected:
+  explicit nsMathMLmencloseFrame(nsStyleContext* aContext);
+  virtual ~nsMathMLmencloseFrame();
+
+  nsresult PlaceInternal(DrawTarget*          aDrawTarget,
+                         bool                 aPlaceOrigin,
+                         ReflowOutput& aDesiredSize,
+                         bool                 aWidthOnly);
+
+  // functions to parse the "notation" attribute.
+  nsresult AddNotation(const nsAString& aNotation);
+  void InitNotations();
+
+  // Description of the notations to draw
+  uint32_t mNotationsToDraw;
+  bool IsToDraw(nsMencloseNotation mask)
+  {
+    return mask & mNotationsToDraw;
+  }
+
+  nscoord mRuleThickness;
+  nscoord mRadicalRuleThickness;
+  nsTArray<nsMathMLChar> mMathMLChar;
+  int8_t mLongDivCharIndex, mRadicalCharIndex;
+  nscoord mContentWidth;
+  nsresult AllocateMathMLChar(nsMencloseNotation mask);
+
+  // Display a frame of the specified type.
+  // @param aType Type of frame to display
+  void DisplayNotation(nsDisplayListBuilder* aBuilder,
+                       nsIFrame* aFrame, const nsRect& aRect,
+                       const nsDisplayListSet& aLists,
+                       nscoord aThickness, nsMencloseNotation aType);
+};
+
+#endif /* nsMathMLmencloseFrame_h___ */
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