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Dont constrain absolute children to zero sized parents

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Summary: Absolute children should not be constraint to the size of their parent if the parent does not have a size as this was causes the layout of the child to be skipped.

Reviewed By: gkassabli

Differential Revision: D4453612

fbshipit-source-id: e8269521560d2f42b2d6f0f0ff264a1605a57d79
This commit is contained in:
Emil Sjolander
2017-01-24 17:04:54 -08:00
committed by Facebook Github Bot
parent d391323129
commit a2a84532ff
2 changed files with 25 additions and 5 deletions
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9
yoga/Yoga.c
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@@ -1431,11 +1431,10 @@ static void YGNodeAbsoluteLayoutChild(const YGNodeRef node,
childHeightMeasureMode =
YGFloatIsUndefined(childHeight) ? YGMeasureModeUndefined : YGMeasureModeExactly;
// According to the spec, if the main size is not definite and the
// child's inline axis is parallel to the main axis (i.e. it's
// horizontal), the child should be sized using "UNDEFINED" in
// the main size. Otherwise use "AT_MOST" in the cross axis.
if (!isMainAxisRow && YGFloatIsUndefined(childWidth) && widthMode != YGMeasureModeUndefined) {
// If the size of the parent is defined then try to constrain the absolute child to that size
// as well. This allows text within the absolute child to wrap to the size of its parent.
// This is the same behavior as many browsers implement.
if (!isMainAxisRow && YGFloatIsUndefined(childWidth) && widthMode != YGMeasureModeUndefined && width > 0) {
childWidth = width;
childWidthMeasureMode = YGMeasureModeAtMost;
}