d93880e505
nsReflowStatus::IsEmpty() assertions are added after DISPLAY_REFLOW in the beginning of the Reflow(). A few Reflow() implementations have Reset() calls at the end which are left in place by this patch (with an explanatory comment added to each). These ending Reset()s are only needed for cases where a non-splittable frame passes its own nsReflowStatus to a child's reflow method. Just in case the child leaves a "not fully complete" value in the nsReflowStatus, the non-splittable parent frame must clear out the nsReflowStatus before returning, so that its own parent doesn't then try to split it. MozReview-Commit-ID: 6Jj3jfMAqj4
128 lines
3.8 KiB
C++
128 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsMathMLElement.h"
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#include "mozilla/gfx/2D.h"
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#include <algorithm>
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//
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// <mspace> -- space - implementation
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//
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nsIFrame*
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NS_NewMathMLmspaceFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsMathMLmspaceFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
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nsMathMLmspaceFrame::~nsMathMLmspaceFrame()
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{
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}
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void
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nsMathMLmspaceFrame::ProcessAttributes(nsPresContext* aPresContext)
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{
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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->GetAttr(kNameSpaceID_None, nsGkAtoms::width, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mWidth,
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nsMathMLElement::PARSE_ALLOW_NEGATIVE,
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aPresContext, mStyleContext, 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->GetAttr(kNameSpaceID_None, nsGkAtoms::height, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mHeight, 0,
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aPresContext, mStyleContext, 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->GetAttr(kNameSpaceID_None, nsGkAtoms::depth_, value);
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if (!value.IsEmpty()) {
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ParseNumericValue(value, &mDepth, 0,
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aPresContext, mStyleContext, fontSizeInflation);
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}
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}
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void
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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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{
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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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mBoundingMetrics = nsBoundingMetrics();
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mBoundingMetrics.width = mWidth;
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mBoundingMetrics.ascent = mHeight;
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mBoundingMetrics.descent = mDepth;
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mBoundingMetrics.leftBearing = 0;
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mBoundingMetrics.rightBearing = mBoundingMetrics.width;
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aDesiredSize.SetBlockStartAscent(mHeight);
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aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
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aDesiredSize.Height() = aDesiredSize.BlockStartAscent() + mDepth;
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// Also return our bounding metrics
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
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}
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/* virtual */ nsresult
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nsMathMLmspaceFrame::MeasureForWidth(DrawTarget* aDrawTarget,
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ReflowOutput& aDesiredSize)
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{
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ProcessAttributes(PresContext());
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mBoundingMetrics = nsBoundingMetrics();
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mBoundingMetrics.width = mWidth;
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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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