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Bug 1920160: Part 4 - Move CSSAlignmentForAbsPosChild to nsContainerFrame. r=jwatt,firefox-style-system-reviewers,emilio

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Absolutely positioned elements can be aligned, so it no longer
is grid-specific.

Differential Revision: https://phabricator.services.mozilla.com/D226530
This commit is contained in:
David Shin
2024-11-07 16:33:41 +00:00
parent 9acf936b11
commit ee160a66f7
3 changed files with 37 additions and 53 deletions
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45
layout/generic/nsGridContainerFrame.cpp
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@@ -9751,51 +9751,6 @@ void nsGridContainerFrame::RemoveFrame(DestroyContext& aContext,
nsContainerFrame::RemoveFrame(aContext, aListID, aOldFrame);
}
StyleAlignFlags nsGridContainerFrame::CSSAlignmentForAbsPosChild(
const ReflowInput& aChildRI, LogicalAxis aLogicalAxis) const {
MOZ_ASSERT(aChildRI.mFrame->IsAbsolutelyPositioned(),
"This method should only be called for abspos children");
StyleAlignFlags alignment =
(aLogicalAxis == LogicalAxis::Inline)
? aChildRI.mStylePosition->UsedJustifySelf(Style())._0
: aChildRI.mStylePosition->UsedAlignSelf(Style())._0;
// Extract and strip the flag bits
StyleAlignFlags alignmentFlags = alignment & StyleAlignFlags::FLAG_BITS;
alignment &= ~StyleAlignFlags::FLAG_BITS;
if (alignment == StyleAlignFlags::NORMAL) {
// "the 'normal' keyword behaves as 'start' on replaced
// absolutely-positioned boxes, and behaves as 'stretch' on all other
// absolutely-positioned boxes."
// https://drafts.csswg.org/css-align/#align-abspos
// https://drafts.csswg.org/css-align/#justify-abspos
alignment = aChildRI.mFrame->IsReplaced() ? StyleAlignFlags::START
: StyleAlignFlags::STRETCH;
} else if (alignment == StyleAlignFlags::FLEX_START) {
alignment = StyleAlignFlags::START;
} else if (alignment == StyleAlignFlags::FLEX_END) {
alignment = StyleAlignFlags::END;
} else if (alignment == StyleAlignFlags::LEFT ||
alignment == StyleAlignFlags::RIGHT) {
if (aLogicalAxis == LogicalAxis::Inline) {
const bool isLeft = (alignment == StyleAlignFlags::LEFT);
WritingMode wm = GetWritingMode();
alignment = (isLeft == wm.IsBidiLTR()) ? StyleAlignFlags::START
: StyleAlignFlags::END;
} else {
alignment = StyleAlignFlags::START;
}
} else if (alignment == StyleAlignFlags::BASELINE) {
alignment = StyleAlignFlags::START;
} else if (alignment == StyleAlignFlags::LAST_BASELINE) {
alignment = StyleAlignFlags::END;
}
return (alignment | alignmentFlags);
}
nscoord nsGridContainerFrame::SynthesizeBaseline(
const FindItemInGridOrderResult& aGridOrderItem, LogicalAxis aAxis,
BaselineSharingGroup aGroup, const nsSize& aCBPhysicalSize, nscoord aCBSize,