Summary:
In the persistent version of Yoga, a YogaNode can be shared between two YogaTrees, that means that a YogaNode could have more than one Parent at one point in time. That's why the concept of Parent of a YogaNode is not a 1-1 relationship anymore.
This diff changes the semantic of Parent of a YogaNode to Owner of a Yoga Node. CC sebmarkbage and priteshrnandgaonkar for more context.
Technically this diff renames the field YogaNode.parent to YogaNode.owner (and every internal field, Getter and Setter that is related to parent)
Note that as part of this diff I also modified the CSSLayoutDEPRECATED version of Yoga in order to keep compatibility with the C++ implementation.
Reviewed By: priteshrnandgaonkar
Differential Revision: D7352778
fbshipit-source-id: dcf1af5e72bfc3063b5c4bda197d7952a9194768
Summary:
We had functions for inserting/removing a specific child, but not for simply replacing the child set with another list.
`YGNodeSetChildren()` will unhook child nodes from the parent that don't appear in the new set. We set the disconnected child node layouts to `YGLayout()` b/c that's what the rest of the code does.
`YGTraversePreOrder()` walks the tree and calls a labmda for each node. We could very easily add a post-order traversal and the ability to stop traversal if we ever want, but for now this is an MVP.
Reviewed By: Woody17
Differential Revision: D7360203
fbshipit-source-id: 32df8e1213ead03bc0a026ec4bf453bc799bb9ce
