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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/dom/MathMLElement.h"
#include "mozilla/PresShell.h"
#include "mozilla/gfx/2D.h"
#include "nsLayoutUtils.h"
#include <algorithm>
using namespace mozilla;
//
// <mspace> -- space - implementation
//
nsIFrame* NS_NewMathMLmspaceFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell)
nsMathMLmspaceFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
nsMathMLmspaceFrame::~nsMathMLmspaceFrame() = default;
nsresult nsMathMLmspaceFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None) {
bool hasDirtyAttributes = false;
IntrinsicDirty intrinsicDirty = IntrinsicDirty::None;
if (aAttribute == nsGkAtoms::width) {
mWidth.mState = Attribute::ParsingState::Dirty;
hasDirtyAttributes = true;
intrinsicDirty = IntrinsicDirty::FrameAndAncestors;
} else if (aAttribute == nsGkAtoms::height) {
mHeight.mState = Attribute::ParsingState::Dirty;
hasDirtyAttributes = true;
} else if (aAttribute == nsGkAtoms::depth) {
mDepth.mState = Attribute::ParsingState::Dirty;
hasDirtyAttributes = true;
}
if (hasDirtyAttributes) {
PresShell()->FrameNeedsReflow(this, intrinsicDirty, NS_FRAME_IS_DIRTY);
}
return NS_OK;
}
return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
}
nscoord nsMathMLmspaceFrame::CalculateAttributeValue(nsAtom* aAtom,
Attribute& aAttribute,
uint32_t aFlags,
float aFontSizeInflation) {
if (aAttribute.mState == Attribute::ParsingState::Dirty) {
nsAutoString value;
aAttribute.mState = Attribute::ParsingState::Invalid;
mContent->AsElement()->GetAttr(aAtom, value);
if (!value.IsEmpty()) {
if (dom::MathMLElement::ParseNumericValue(
value, aAttribute.mValue, aFlags, PresContext()->Document())) {
aAttribute.mState = Attribute::ParsingState::Valid;
} else {
ReportParseError(aAtom->GetUTF16String(), value.get());
}
}
}
// Invalid is interpreted as the default which is 0.
// Percentages are interpreted as a multiple of the default value.
if (aAttribute.mState == Attribute::ParsingState::Invalid ||
aAttribute.mValue.GetUnit() == eCSSUnit_Percent) {
return 0;
}
return CalcLength(aAttribute.mValue, aFontSizeInflation, this);
}
nsresult nsMathMLmspaceFrame::Place(DrawTarget* aDrawTarget,
const PlaceFlags& aFlags,
ReflowOutput& aDesiredSize) {
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
// <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.
nscoord width = CalculateAttributeValue(
nsGkAtoms::width, mWidth, dom::MathMLElement::PARSE_ALLOW_NEGATIVE,
fontSizeInflation);
// We do not allow negative values for height and depth attributes. See bug
// 716349.
nscoord height =
CalculateAttributeValue(nsGkAtoms::height, mHeight, 0, fontSizeInflation);
nscoord depth =
CalculateAttributeValue(nsGkAtoms::depth, mDepth, 0, fontSizeInflation);
mBoundingMetrics = nsBoundingMetrics();
mBoundingMetrics.width = width;
mBoundingMetrics.ascent = height;
mBoundingMetrics.descent = depth;
mBoundingMetrics.leftBearing = 0;
mBoundingMetrics.rightBearing = mBoundingMetrics.width;
aDesiredSize.SetBlockStartAscent(mBoundingMetrics.ascent);
aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
aDesiredSize.Height() = mBoundingMetrics.ascent + mBoundingMetrics.descent;
// Also return our bounding metrics
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
// Apply width/height to math content box.
const PlaceFlags flags;
auto sizes = GetWidthAndHeightForPlaceAdjustment(flags);
ApplyAdjustmentForWidthAndHeight(flags, sizes, aDesiredSize,
mBoundingMetrics);
// Add padding+border.
auto borderPadding = GetBorderPaddingForPlace(aFlags);
InflateReflowAndBoundingMetrics(borderPadding, aDesiredSize,
mBoundingMetrics);
return NS_OK;
}
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