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Overflow detection in Yoga

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Summary:
We need to provide Yoga clients with means of detecting overflow in flexbox layout. This information can be used later to identify a non-overflowing layout variant among others.

Flexbox layout considered overflown if (this is *not* an exhaustive list):

- if any child node overflows
- [no-wrap] total flex basis of all child nodes is greater than available space in parent and there are no flexible children
- [no-wrap] after flexing there is still not enough space to layout all child nodes

Reviewed By: gkassabli

Differential Revision: D5336645

fbshipit-source-id: c4f87d1754d7bac848e8d347b31d619393b94d2c
This commit is contained in:
Andrey Mishanin
2017-06-30 09:19:33 -07:00
committed by Facebook Github Bot
parent 11bc97b16c
commit ce3f99939f
3 changed files with 109 additions and 0 deletions
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yoga/Yoga.h
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@@ -215,6 +215,7 @@ YG_NODE_LAYOUT_PROPERTY(float, Bottom);
YG_NODE_LAYOUT_PROPERTY(float, Width);
YG_NODE_LAYOUT_PROPERTY(float, Height);
YG_NODE_LAYOUT_PROPERTY(YGDirection, Direction);
YG_NODE_LAYOUT_PROPERTY(bool, HadOverflow);
// Get the computed values for these nodes after performing layout. If they were set using
// point values then the returned value will be the same as YGNodeStyleGetXXX. However if