126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsMathMLmspaceFrame.h"
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#include "mozilla/dom/MathMLElement.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/gfx/2D.h"
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#include "nsLayoutUtils.h"
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#include <algorithm>
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using namespace mozilla;
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//
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// <mspace> -- space - implementation
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//
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nsIFrame* NS_NewMathMLmspaceFrame(PresShell* aPresShell,
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ComputedStyle* aStyle) {
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return new (aPresShell)
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nsMathMLmspaceFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
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nsMathMLmspaceFrame::~nsMathMLmspaceFrame() = default;
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nsresult nsMathMLmspaceFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) {
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if (aNameSpaceID == kNameSpaceID_None) {
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bool hasDirtyAttributes = false;
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IntrinsicDirty intrinsicDirty = IntrinsicDirty::None;
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if (aAttribute == nsGkAtoms::width) {
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mWidth.mState = Attribute::ParsingState::Dirty;
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hasDirtyAttributes = true;
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intrinsicDirty = IntrinsicDirty::FrameAndAncestors;
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} else if (aAttribute == nsGkAtoms::height) {
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mHeight.mState = Attribute::ParsingState::Dirty;
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hasDirtyAttributes = true;
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} else if (aAttribute == nsGkAtoms::depth) {
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mDepth.mState = Attribute::ParsingState::Dirty;
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hasDirtyAttributes = true;
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}
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if (hasDirtyAttributes) {
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PresShell()->FrameNeedsReflow(this, intrinsicDirty, NS_FRAME_IS_DIRTY);
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}
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return NS_OK;
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}
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return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
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aModType);
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}
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nscoord nsMathMLmspaceFrame::CalculateAttributeValue(nsAtom* aAtom,
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Attribute& aAttribute,
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uint32_t aFlags,
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float aFontSizeInflation) {
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if (aAttribute.mState == Attribute::ParsingState::Dirty) {
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nsAutoString value;
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aAttribute.mState = Attribute::ParsingState::Invalid;
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mContent->AsElement()->GetAttr(aAtom, value);
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if (!value.IsEmpty()) {
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if (dom::MathMLElement::ParseNumericValue(
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value, aAttribute.mValue, aFlags, PresContext()->Document())) {
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aAttribute.mState = Attribute::ParsingState::Valid;
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} else {
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ReportParseError(aAtom->GetUTF16String(), value.get());
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}
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}
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}
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// Invalid is interpreted as the default which is 0.
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// Percentages are interpreted as a multiple of the default value.
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if (aAttribute.mState == Attribute::ParsingState::Invalid ||
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aAttribute.mValue.GetUnit() == eCSSUnit_Percent) {
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return 0;
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}
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return CalcLength(aAttribute.mValue, aFontSizeInflation, this);
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}
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nsresult nsMathMLmspaceFrame::Place(DrawTarget* aDrawTarget,
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const PlaceFlags& aFlags,
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ReflowOutput& aDesiredSize) {
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float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
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// <mspace/> is listed among MathML elements allowing negative spacing and
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// the MathML test suite contains "Presentation/TokenElements/mspace/mspace2"
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// as an example. Hence we allow negative values.
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nscoord width = CalculateAttributeValue(
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nsGkAtoms::width, mWidth, dom::MathMLElement::PARSE_ALLOW_NEGATIVE,
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fontSizeInflation);
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// We do not allow negative values for height and depth attributes. See bug
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// 716349.
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nscoord height =
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CalculateAttributeValue(nsGkAtoms::height, mHeight, 0, fontSizeInflation);
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nscoord depth =
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CalculateAttributeValue(nsGkAtoms::depth, mDepth, 0, fontSizeInflation);
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mBoundingMetrics = nsBoundingMetrics();
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mBoundingMetrics.width = width;
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mBoundingMetrics.ascent = height;
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mBoundingMetrics.descent = depth;
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mBoundingMetrics.leftBearing = 0;
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mBoundingMetrics.rightBearing = mBoundingMetrics.width;
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aDesiredSize.SetBlockStartAscent(mBoundingMetrics.ascent);
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aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
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aDesiredSize.Height() = mBoundingMetrics.ascent + mBoundingMetrics.descent;
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// Also return our bounding metrics
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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// Apply width/height to math content box.
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const PlaceFlags flags;
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auto sizes = GetWidthAndHeightForPlaceAdjustment(flags);
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ApplyAdjustmentForWidthAndHeight(flags, sizes, aDesiredSize,
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mBoundingMetrics);
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// Add padding+border.
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auto borderPadding = GetBorderPaddingForPlace(aFlags);
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InflateReflowAndBoundingMetrics(borderPadding, aDesiredSize,
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mBoundingMetrics);
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return NS_OK;
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}
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