forked from mirrors/gecko-dev
f101e2077d
In the description of the mTruncated bit, its purpose is the same as calling SetInlineLineBreakBeforeAndReset(). We've removed all its usages in previous patches, so the bit is no longer needed. Differential Revision: https://phabricator.services.mozilla.com/D151461
124 lines
4.2 KiB
C++
124 lines
4.2 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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void nsMathMLmspaceFrame::ProcessAttributes(nsPresContext* aPresContext) {
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nsAutoString value;
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float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
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// width
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//
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// "Specifies the desired width of the space."
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//
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// values: length
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// default: 0em
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//
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// The default value is "0em", so unitless values can be ignored.
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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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//
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mWidth = 0;
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mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mWidth, dom::MathMLElement::PARSE_ALLOW_NEGATIVE,
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aPresContext, mComputedStyle, fontSizeInflation);
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}
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// height
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//
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// "Specifies the desired height (above the baseline) of the space."
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//
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// values: length
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// default: 0ex
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//
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// The default value is "0ex", so unitless values can be ignored.
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// We do not allow negative values. See bug 716349.
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//
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mHeight = 0;
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mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mHeight, 0, aPresContext, mComputedStyle,
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fontSizeInflation);
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}
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// depth
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//
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// "Specifies the desired depth (below the baseline) of the space."
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//
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// values: length
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// default: 0ex
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//
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// The default value is "0ex", so unitless values can be ignored.
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// We do not allow negative values. See bug 716349.
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//
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mDepth = 0;
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mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::depth_, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mDepth, 0, aPresContext, mComputedStyle,
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fontSizeInflation);
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}
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}
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void nsMathMLmspaceFrame::Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) {
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MarkInReflow();
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MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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mPresentationData.flags &= ~NS_MATHML_ERROR;
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ProcessAttributes(aPresContext);
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auto borderPadding = aReflowInput.ComputedPhysicalBorderPadding();
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mBoundingMetrics = nsBoundingMetrics();
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mBoundingMetrics.width = mWidth + borderPadding.LeftRight();
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mBoundingMetrics.ascent = mHeight + borderPadding.Side(eSideTop);
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mBoundingMetrics.descent = mDepth + borderPadding.Side(eSideBottom);
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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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}
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/* virtual */
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nsresult nsMathMLmspaceFrame::MeasureForWidth(DrawTarget* aDrawTarget,
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ReflowOutput& aDesiredSize) {
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ProcessAttributes(PresContext());
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mBoundingMetrics = nsBoundingMetrics();
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auto offsets = IntrinsicISizeOffsets();
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mBoundingMetrics.width = mWidth + offsets.padding + offsets.border;
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aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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return NS_OK;
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}
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