The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/layout/mathml/nsMathMLmspaceFrame.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,130 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +#include "nsMathMLmspaceFrame.h"
    1.10 +#include "nsMathMLElement.h"
    1.11 +#include "mozilla/gfx/2D.h"
    1.12 +#include <algorithm>
    1.13 +
    1.14 +
    1.15 +//
    1.16 +// <mspace> -- space - implementation
    1.17 +//
    1.18 +
    1.19 +nsIFrame*
    1.20 +NS_NewMathMLmspaceFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
    1.21 +{
    1.22 +  return new (aPresShell) nsMathMLmspaceFrame(aContext);
    1.23 +}
    1.24 +
    1.25 +NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
    1.26 +
    1.27 +nsMathMLmspaceFrame::~nsMathMLmspaceFrame()
    1.28 +{
    1.29 +}
    1.30 +
    1.31 +bool
    1.32 +nsMathMLmspaceFrame::IsLeaf() const
    1.33 +{
    1.34 +  return true;
    1.35 +}
    1.36 +
    1.37 +void
    1.38 +nsMathMLmspaceFrame::ProcessAttributes(nsPresContext* aPresContext)
    1.39 +{
    1.40 +  nsAutoString value;
    1.41 +
    1.42 +  // width 
    1.43 +  //
    1.44 +  // "Specifies the desired width of the space."
    1.45 +  //
    1.46 +  // values: length
    1.47 +  // default: 0em
    1.48 +  //
    1.49 +  // The default value is "0em", so unitless values can be ignored.
    1.50 +  // <mspace/> is listed among MathML elements allowing negative spacing and
    1.51 +  // the MathML test suite contains "Presentation/TokenElements/mspace/mspace2" 
    1.52 +  // as an example. Hence we allow negative values.
    1.53 +  //
    1.54 +  mWidth = 0;
    1.55 +  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value);
    1.56 +  if (!value.IsEmpty()) {
    1.57 +    ParseNumericValue(value, &mWidth,
    1.58 +                      nsMathMLElement::PARSE_ALLOW_NEGATIVE,
    1.59 +                      aPresContext, mStyleContext);
    1.60 +  }
    1.61 +
    1.62 +  // height
    1.63 +  //
    1.64 +  // "Specifies the desired height (above the baseline) of the space."
    1.65 +  //
    1.66 +  // values: length
    1.67 +  // default: 0ex
    1.68 +  //
    1.69 +  // The default value is "0ex", so unitless values can be ignored.
    1.70 +  // We do not allow negative values. See bug 716349.
    1.71 +  //
    1.72 +  mHeight = 0;
    1.73 +  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value);
    1.74 +  if (!value.IsEmpty()) {
    1.75 +    ParseNumericValue(value, &mHeight, 0,
    1.76 +                      aPresContext, mStyleContext);
    1.77 +  }
    1.78 +
    1.79 +  // depth
    1.80 +  //
    1.81 +  // "Specifies the desired depth (below the baseline) of the space."
    1.82 +  //
    1.83 +  // values: length
    1.84 +  // default: 0ex
    1.85 +  //
    1.86 +  // The default value is "0ex", so unitless values can be ignored.
    1.87 +  // We do not allow negative values. See bug 716349.
    1.88 +  //
    1.89 +  mDepth = 0;
    1.90 +  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::depth_, value);
    1.91 +  if (!value.IsEmpty()) {
    1.92 +    ParseNumericValue(value, &mDepth, 0,
    1.93 +                      aPresContext, mStyleContext);
    1.94 +  }
    1.95 +}
    1.96 +
    1.97 +nsresult
    1.98 +nsMathMLmspaceFrame::Reflow(nsPresContext*          aPresContext,
    1.99 +                            nsHTMLReflowMetrics&     aDesiredSize,
   1.100 +                            const nsHTMLReflowState& aReflowState,
   1.101 +                            nsReflowStatus&          aStatus)
   1.102 +{
   1.103 +  ProcessAttributes(aPresContext);
   1.104 +
   1.105 +  mBoundingMetrics = nsBoundingMetrics();
   1.106 +  mBoundingMetrics.width = mWidth;
   1.107 +  mBoundingMetrics.ascent = mHeight;
   1.108 +  mBoundingMetrics.descent = mDepth;
   1.109 +  mBoundingMetrics.leftBearing = 0;
   1.110 +  mBoundingMetrics.rightBearing = mBoundingMetrics.width;
   1.111 +
   1.112 +  aDesiredSize.SetTopAscent(mHeight);
   1.113 +  aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
   1.114 +  aDesiredSize.Height() = aDesiredSize.TopAscent() + mDepth;
   1.115 +  // Also return our bounding metrics
   1.116 +  aDesiredSize.mBoundingMetrics = mBoundingMetrics;
   1.117 +
   1.118 +  aStatus = NS_FRAME_COMPLETE;
   1.119 +  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
   1.120 +  return NS_OK;
   1.121 +}
   1.122 +
   1.123 +/* virtual */ nsresult
   1.124 +nsMathMLmspaceFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
   1.125 +                                     nsHTMLReflowMetrics& aDesiredSize)
   1.126 +{
   1.127 +  ProcessAttributes(PresContext());
   1.128 +  mBoundingMetrics = nsBoundingMetrics();
   1.129 +  mBoundingMetrics.width = mWidth;
   1.130 +  aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
   1.131 +  aDesiredSize.mBoundingMetrics = mBoundingMetrics;
   1.132 +  return NS_OK;
   1.133 +}