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Issue #1370 - Part 3: Implement content keyword for flex-basis property

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Partially based on https://bugzilla.mozilla.org/show_bug.cgi?id=1105111
This commit is contained in:
FranklinDM 2022-04-06 23:59:01 +08:00 • committed by roytam1
commit 9dc59c43f1
9 changed files with 63 additions and 8 deletions
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25
layout/generic/nsContainerFrame.cpp
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@ -947,8 +947,29 @@ nsContainerFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
aBorder.ISize(aWM) - aPadding.ISize(aWM);
// replaced elements always shrink-wrap
if ((aFlags & ComputeSizeFlags::eShrinkWrap) || IsFrameOfType(eReplaced)) {
// don't bother setting it if the result won't be used
if (StylePosition()->ISize(aWM).GetUnit() == eStyleUnit_Auto) {
const nsStylePosition* position = StylePosition();
bool isFlexBasisContent = false;
if (IsFlexItem()) {
uint32_t flexDirection =
GetParent()->StylePosition()->mFlexDirection;
bool isInlineFlexItem =
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW ||
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW_REVERSE;
isFlexBasisContent =
position->mFlexBasis.GetUnit() == eStyleUnit_Enumerated &&
position->mFlexBasis.GetIntValue() == NS_STYLE_FLEX_BASIS_CONTENT &&
isInlineFlexItem;
}
// Only bother computing our 'auto' ISize if the result will be used.
// It'll be used under two scenarios:
// - If our ISize property is itself 'auto'.
// - If we're using flex-basis in place of our ISize property (i.e. we're a
// flex item with our inline axis being the main axis), AND we have
// flex-basis:content.
bool isAuto = position->ISize(aWM).GetUnit() == eStyleUnit_Auto;
if (isAuto || isFlexBasisContent) {
result.ISize(aWM) = ShrinkWidthToFit(aRenderingContext, availBased, aFlags);
}
} else {