The Tor Browser: layout/mathml/nsMathMLmsqrtFrame.cpp@7e26c7da4463

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsMathMLmsqrtFrame.h"

     7 #include "mozilla/gfx/2D.h"

     9 //

    10 // <msqrt> -- form a radical - implementation

    11 //

    13 //NOTE:

    14 //  The code assumes that TeX fonts are picked.

    15 //  There is no fall-back to draw the branches of the sqrt explicitly

    16 //  in the case where TeX fonts are not there. In general, there are no

    17 //  fall-back(s) in MathML when some (freely-downloadable) fonts are missing.

    18 //  Otherwise, this will add much work and unnecessary complexity to the core

    19 //  MathML  engine. Assuming that authors have the free fonts is part of the

    20 //  deal. We are not responsible for cases of misconfigurations out there.

    22 nsIFrame*

    23 NS_NewMathMLmsqrtFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    24 {

    25   return new (aPresShell) nsMathMLmsqrtFrame(aContext);

    26 }

    28 NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmsqrtFrame)

    30 nsMathMLmsqrtFrame::nsMathMLmsqrtFrame(nsStyleContext* aContext) :

    31   nsMathMLmencloseFrame(aContext)

    32 {

    33 }

    35 nsMathMLmsqrtFrame::~nsMathMLmsqrtFrame()

    36 {

    37 }

    39 void

    40 nsMathMLmsqrtFrame::Init(nsIContent*      aContent,

    41                          nsIFrame*        aParent,

    42                          nsIFrame*        aPrevInFlow)

    43 {

    44   nsMathMLContainerFrame::Init(aContent, aParent, aPrevInFlow);

    45   AllocateMathMLChar(NOTATION_RADICAL);

    46   mNotationsToDraw |= NOTATION_RADICAL;

    47 }

    49 NS_IMETHODIMP

    50 nsMathMLmsqrtFrame::InheritAutomaticData(nsIFrame* aParent)

    51 {

    52   nsMathMLContainerFrame::InheritAutomaticData(aParent);

    54   mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;

    56   return NS_OK;

    57 }

    59 nsresult

    60 nsMathMLmsqrtFrame::AttributeChanged(int32_t         aNameSpaceID,

    61                                      nsIAtom*        aAttribute,

    62                                      int32_t         aModType)

    63 {

    64   return nsMathMLContainerFrame::

    65     AttributeChanged(aNameSpaceID, aAttribute, aModType);

    66 }

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