4266409934
Summary: This fix issue https://github.com/facebook/yoga/issues/683 the rounding calculation is incorrect if a node is crossing an axis and it will shrink it's width/height on layout calculation. The following test reproduce the issue : ``` TEST(YogaTest, node_shrink_on_axis) { const YGConfigRef config = YGConfigNew(); const YGNodeRef root = YGNodeNewWithConfig(config); const YGNodeRef child = YGNodeNewWithConfig(config); YGNodeInsertChild(root, child, 0); YGNodeStyleSetWidth(child, 10); YGNodeStyleSetHeight(child, 10); YGNodeStyleSetPosition(root, YGEdgeLeft, -0.75f); YGNodeStyleSetPosition(root, YGEdgeTop, -0.75f); YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR); ASSERT_FLOAT_EQ(YGNodeLayoutGetWidth(child), 10); ASSERT_FLOAT_EQ(YGNodeLayoutGetHeight(child), 10); YGNodeFreeRecursive(root); YGConfigFree(config); } ``` Pull Request resolved: https://github.com/facebook/yoga/pull/688 Reviewed By: NickGerleman Differential Revision: D13866122 Pulled By: rozele fbshipit-source-id: 4faf8a9efc86723c303f600d730660a2e13d8a73
Yoga 
Yoga is an embeddable and performant flexbox layout engine with bindings for multiple languages.
Building
Yoga's main implementation targets C++ 14 with accompanying build logic in CMake. A wrapper is provided to build the main library and run unit tests.
./unit_tests <Debug|Release>
While not required, this script will use ninja if it is installed for faster builds.
Yoga is additionally part of the vcpkg collection of ports maintained by Microsoft and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.
Adding Tests
Many of Yoga's tests are automatically generated, using HTML fixtures describing node structure. These are rendered in Chrome to generate an expected layout result for the tree. New fixtures can be added to gentest/fixtures.
<div id="my_test" style="width: 100px; height: 100px; align-items: center;">
<div style="width: 50px; height: 50px;"></div>
</div>
To generate new tests from added fixtures:
- Run
bundle installin thegentestdirectory to install dependencies of the test generator. - Run
ruby gentest.rbin thegentestdirectory.
Debugging
Yoga provides a VSCode "launch.json" configuration which allows debugging unit tests. Simply add your breakpoints, and run "Debug C++ Unit tests (lldb)" (or "Debug C++ Unit tests (vsdbg)" on Windows).