118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla MathML Project.
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*
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* The Initial Developer of the Original Code is The University Of
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* Queensland. Portions created by The University Of Queensland are
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* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
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*
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* Contributor(s):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
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* Vilya Harvey <vilya@nag.co.uk>
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* Shyjan Mahamud <mahamud@cs.cmu.edu>
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*/
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#ifndef nsMathMLmsqrtFrame_h___
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#define nsMathMLmsqrtFrame_h___
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#include "nsCOMPtr.h"
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#include "nsMathMLContainerFrame.h"
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//
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// <msqrt> -- form a fraction from two subexpressions
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//
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/*
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The MathML REC describes:
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The <msqrt> element is used to display square roots.
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The syntax for <msqrt> is:
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<msqrt> base </msqrt>
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Attributes of <msqrt> and <mroot>:
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None (except the attributes allowed for all MathML elements, listed in Section
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2.3.4).
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The <mroot> element increments scriptlevel by 2, and sets displaystyle to
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"false", within index, but leaves both attributes unchanged within base. The
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<msqrt> element leaves both attributes unchanged within all its arguments.
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These attributes are inherited by every element from its rendering environment,
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but can be set explicitly only on <mstyle>. (See Section 3.3.4.)
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*/
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/*
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TODO:
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*/
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class nsMathMLmsqrtFrame : public nsMathMLContainerFrame {
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public:
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friend nsresult NS_NewMathMLmsqrtFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
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NS_IMETHOD
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SetAdditionalStyleContext(PRInt32 aIndex,
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nsIStyleContext* aStyleContext);
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NS_IMETHOD
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GetAdditionalStyleContext(PRInt32 aIndex,
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nsIStyleContext** aStyleContext) const;
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NS_IMETHOD
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Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD
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Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD
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Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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NS_IMETHOD
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InheritAutomaticData(nsIPresContext* aPresContext,
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nsIFrame* aParent);
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NS_IMETHOD
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TransmitAutomaticData(nsIPresContext* aPresContext);
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virtual nsresult
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FixInterFrameSpacing(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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// XXX the base method doesn't work properly with <msqrt> because it
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// only slides child frames and has no idea that we have a sqrt glyph
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// that is part of the flow without being a frame. We need to shift our
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// sqrt glyph too, but since m0.9.9 is going out... do nothing for now
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return NS_OK;
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}
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protected:
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nsMathMLmsqrtFrame();
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virtual ~nsMathMLmsqrtFrame();
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virtual PRIntn GetSkipSides() const { return 0; }
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nsMathMLChar mSqrChar;
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nsRect mBarRect;
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};
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#endif /* nsMathMLmsqrtFrame_h___ */
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