133 lines
3.8 KiB
C++
133 lines
3.8 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 "nsMathMLmspaceFrame.h"
|
|
#include "nsMathMLElement.h"
|
|
#include "mozilla/gfx/2D.h"
|
|
#include <algorithm>
|
|
|
|
|
|
//
|
|
// <mspace> -- space - implementation
|
|
//
|
|
|
|
nsIFrame*
|
|
NS_NewMathMLmspaceFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell) nsMathMLmspaceFrame(aContext);
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
|
|
|
|
nsMathMLmspaceFrame::~nsMathMLmspaceFrame()
|
|
{
|
|
}
|
|
|
|
bool
|
|
nsMathMLmspaceFrame::IsLeaf() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsMathMLmspaceFrame::ProcessAttributes(nsPresContext* aPresContext)
|
|
{
|
|
nsAutoString value;
|
|
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
|
|
|
|
// width
|
|
//
|
|
// "Specifies the desired width of the space."
|
|
//
|
|
// values: length
|
|
// default: 0em
|
|
//
|
|
// The default value is "0em", so unitless values can be ignored.
|
|
// <mspace/> is listed among MathML elements allowing negative spacing and
|
|
// the MathML test suite contains "Presentation/TokenElements/mspace/mspace2"
|
|
// as an example. Hence we allow negative values.
|
|
//
|
|
mWidth = 0;
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value);
|
|
if (!value.IsEmpty()) {
|
|
ParseNumericValue(value, &mWidth,
|
|
nsMathMLElement::PARSE_ALLOW_NEGATIVE,
|
|
aPresContext, mStyleContext, fontSizeInflation);
|
|
}
|
|
|
|
// height
|
|
//
|
|
// "Specifies the desired height (above the baseline) of the space."
|
|
//
|
|
// values: length
|
|
// default: 0ex
|
|
//
|
|
// The default value is "0ex", so unitless values can be ignored.
|
|
// We do not allow negative values. See bug 716349.
|
|
//
|
|
mHeight = 0;
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value);
|
|
if (!value.IsEmpty()) {
|
|
ParseNumericValue(value, &mHeight, 0,
|
|
aPresContext, mStyleContext, fontSizeInflation);
|
|
}
|
|
|
|
// depth
|
|
//
|
|
// "Specifies the desired depth (below the baseline) of the space."
|
|
//
|
|
// values: length
|
|
// default: 0ex
|
|
//
|
|
// The default value is "0ex", so unitless values can be ignored.
|
|
// We do not allow negative values. See bug 716349.
|
|
//
|
|
mDepth = 0;
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::depth_, value);
|
|
if (!value.IsEmpty()) {
|
|
ParseNumericValue(value, &mDepth, 0,
|
|
aPresContext, mStyleContext, fontSizeInflation);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsMathMLmspaceFrame::Reflow(nsPresContext* aPresContext,
|
|
ReflowOutput& aDesiredSize,
|
|
const ReflowInput& aReflowInput,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
MarkInReflow();
|
|
mPresentationData.flags &= ~NS_MATHML_ERROR;
|
|
ProcessAttributes(aPresContext);
|
|
|
|
mBoundingMetrics = nsBoundingMetrics();
|
|
mBoundingMetrics.width = mWidth;
|
|
mBoundingMetrics.ascent = mHeight;
|
|
mBoundingMetrics.descent = mDepth;
|
|
mBoundingMetrics.leftBearing = 0;
|
|
mBoundingMetrics.rightBearing = mBoundingMetrics.width;
|
|
|
|
aDesiredSize.SetBlockStartAscent(mHeight);
|
|
aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
|
|
aDesiredSize.Height() = aDesiredSize.BlockStartAscent() + mDepth;
|
|
// Also return our bounding metrics
|
|
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
|
|
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
|
|
}
|
|
|
|
/* virtual */ nsresult
|
|
nsMathMLmspaceFrame::MeasureForWidth(DrawTarget* aDrawTarget,
|
|
ReflowOutput& aDesiredSize)
|
|
{
|
|
ProcessAttributes(PresContext());
|
|
mBoundingMetrics = nsBoundingMetrics();
|
|
mBoundingMetrics.width = mWidth;
|
|
aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
|
|
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
|
|
return NS_OK;
|
|
}
|