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131 lines
4.4 KiB
C++
131 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* The University Of Queensland.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. 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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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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 nsIFrame* NS_NewMathMLmsqrtFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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virtual void
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SetAdditionalStyleContext(PRInt32 aIndex,
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nsStyleContext* aStyleContext);
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virtual nsStyleContext*
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GetAdditionalStyleContext(PRInt32 aIndex) const;
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NS_IMETHOD
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Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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virtual nsresult
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Place(nsIRenderingContext& aRenderingContext,
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PRBool aPlaceOrigin,
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nsHTMLReflowMetrics& aDesiredSize);
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virtual nscoord
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GetIntrinsicWidth(nsIRenderingContext* aRenderingContext);
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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NS_IMETHOD
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InheritAutomaticData(nsIFrame* aParent);
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NS_IMETHOD
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TransmitAutomaticData();
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// the base method doesn't deal fully with <msqrt> because it only
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// slides child frames and has no idea that we have a sqrt glyph that
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// is part of the flow without being a frame. We need to shift our
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// sqrt glyph too.
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virtual nscoord
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FixInterFrameSpacing(nsHTMLReflowMetrics& aDesiredSize);
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protected:
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nsMathMLmsqrtFrame(nsStyleContext* aContext);
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virtual ~nsMathMLmsqrtFrame();
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virtual PRIntn GetSkipSides() const { return 0; }
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virtual nsresult
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MeasureChildFrames(nsIRenderingContext& aRenderingContext,
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nsHTMLReflowMetrics& aDesiredSize);
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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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