The Tor Browser: layout/mathml/nsMathMLmrowFrame.cpp@8bccb770b82d

     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 "nsMathMLmrowFrame.h"

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

     9 //

    10 // <mrow> -- horizontally group any number of subexpressions - implementation

    11 //

    13 nsIFrame*

    14 NS_NewMathMLmrowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    15 {

    16   return new (aPresShell) nsMathMLmrowFrame(aContext);

    17 }

    19 NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmrowFrame)

    21 nsMathMLmrowFrame::~nsMathMLmrowFrame()

    22 {

    23 }

    25 NS_IMETHODIMP

    26 nsMathMLmrowFrame::InheritAutomaticData(nsIFrame* aParent)

    27 {

    28   // let the base class get the default from our parent

    29   nsMathMLContainerFrame::InheritAutomaticData(aParent);

    31   mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;

    33   return NS_OK;

    34 }

    36 nsresult

    37 nsMathMLmrowFrame::AttributeChanged(int32_t  aNameSpaceID,

    38                                     nsIAtom* aAttribute,

    39                                     int32_t  aModType)

    40 {

    41   // Special for <mtable>: In the frame construction code, we also use

    42   // this frame class as a wrapper for mtable. Hence, we should pass the

    43   // notification to the real mtable

    44   if (mContent->Tag() == nsGkAtoms::mtable_) {

    45     nsIFrame* frame = mFrames.FirstChild();

    46     for ( ; frame; frame = frame->GetFirstPrincipalChild()) {

    47       // drill down to the real mtable

    48       if (frame->GetType() == nsGkAtoms::tableOuterFrame)

    49         return frame->AttributeChanged(aNameSpaceID, aAttribute, aModType);

    50     }

    51     NS_NOTREACHED("mtable wrapper without the real table frame");

    52   }

    54   return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);

    55 }

    57 /* virtual */ eMathMLFrameType

    58 nsMathMLmrowFrame::GetMathMLFrameType()

    59 {

    60   if (!IsMrowLike()) {

    61     nsIMathMLFrame* child = do_QueryFrame(mFrames.FirstChild());

    62     if (child) {

    63       // We only have one child, so we return the frame type of that child as if

    64       // we didn't exist.

    65       return child->GetMathMLFrameType();

    66     }

    67   }

    68   return nsMathMLFrame::GetMathMLFrameType();

    69 }

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