1 files changed, 116 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmencloseFrame.h b/layout/mathml/nsMathMLmencloseFrame.h
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+++ b/layout/mathml/nsMathMLmencloseFrame.h
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+/* -*- 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 nsMathMLmencloseFrame_h___
+#define nsMathMLmencloseFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "mozilla/EnumSet.h"
+#include "nsMathMLChar.h"
+#include "nsMathMLContainerFrame.h"
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+//
+// <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,
+  NOTATION_RADICAL,
+  NOTATION_ROUNDEDBOX,
+  NOTATION_CIRCLE,
+  NOTATION_LEFT,
+  NOTATION_RIGHT,
+  NOTATION_TOP,
+  NOTATION_BOTTOM,
+  NOTATION_UPDIAGONALSTRIKE,
+  NOTATION_DOWNDIAGONALSTRIKE,
+  NOTATION_VERTICALSTRIKE,
+  NOTATION_HORIZONTALSTRIKE,
+  NOTATION_UPDIAGONALARROW,
+  NOTATION_PHASORANGLE
+};
+
+class nsMathMLmencloseFrame : public nsMathMLContainerFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmencloseFrame)
+
+  friend nsIFrame* NS_NewMathMLmencloseFrame(mozilla::PresShell* aPresShell,
+                                             ComputedStyle* aStyle);
+
+  virtual nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
+                         ReflowOutput& aDesiredSize) override;
+
+  virtual nsresult MeasureForWidth(DrawTarget* aDrawTarget,
+                                   ReflowOutput& aDesiredSize) override;
+
+  virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                                    int32_t aModType) override;
+
+  void DidSetComputedStyle(ComputedStyle* aOldStyle) override;
+
+  virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                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(ComputedStyle* aStyle,
+                                 nsPresContext* aPresContext,
+                                 ClassID aID = kClassID);
+  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
+  mozilla::EnumSet<nsMencloseNotation> mNotationsToDraw;
+  bool IsToDraw(nsMencloseNotation notation) {
+    return mNotationsToDraw.contains(notation);
+  }
+
+  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___ */