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-rw-r--r--layout/mathml/nsMathMLmpaddedFrame.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmpaddedFrame.h b/layout/mathml/nsMathMLmpaddedFrame.h
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+++ b/layout/mathml/nsMathMLmpaddedFrame.h
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+/* -*- 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 nsMathMLmpaddedFrame_h___
+#define nsMathMLmpaddedFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLContainerFrame.h"
+
+//
+// <mpadded> -- adjust space around content
+//
+
+class nsMathMLmpaddedFrame : public nsMathMLContainerFrame {
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ friend nsIFrame* NS_NewMathMLmpaddedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+
+ 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(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
+ 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();
+
+ static 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___ */