gecko-dev/layout/mathml/nsMathMLmsqrtFrame.cpp

68 строки
2.1 KiB
C++

/* -*- 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/. */
#include "nsMathMLmsqrtFrame.h"
//
// <msqrt> -- form a radical - implementation
//
//NOTE:
// The code assumes that TeX fonts are picked.
// There is no fall-back to draw the branches of the sqrt explicitly
// in the case where TeX fonts are not there. In general, there are no
// fall-back(s) in MathML when some (freely-downloadable) fonts are missing.
// Otherwise, this will add much work and unnecessary complexity to the core
// MathML engine. Assuming that authors have the free fonts is part of the
// deal. We are not responsible for cases of misconfigurations out there.
nsIFrame*
NS_NewMathMLmsqrtFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmsqrtFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmsqrtFrame)
nsMathMLmsqrtFrame::nsMathMLmsqrtFrame(nsStyleContext* aContext) :
nsMathMLmencloseFrame(aContext)
{
}
nsMathMLmsqrtFrame::~nsMathMLmsqrtFrame()
{
}
NS_IMETHODIMP
nsMathMLmsqrtFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsresult rv = nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
AllocateMathMLChar(NOTATION_RADICAL);
mNotationsToDraw |= NOTATION_RADICAL;
return rv;
}
NS_IMETHODIMP
nsMathMLmsqrtFrame::InheritAutomaticData(nsIFrame* aParent)
{
nsMathMLContainerFrame::InheritAutomaticData(aParent);
mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmsqrtFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
return nsMathMLContainerFrame::
AttributeChanged(aNameSpaceID, aAttribute, aModType);
}