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[Yoga] Add insertYogaNode:atIndex: method. Improve handling of relayouts. (#469)

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* [Yoga] Add insertYogaNode:atIndex: method. Improve handling of relayouts.

* Add new "version" parameter to Yoga initialization of ASDisplayNodeLayout C++ struct.
This commit is contained in:
appleguy
2017-09-17 22:45:39 -07:00
committed by GitHub
parent dcaca529b4
commit cfc48679ba
6 changed files with 115 additions and 32 deletions
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27
Source/ASDisplayNode.mm
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@@ -967,23 +967,30 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
// - This node is a Yoga tree root: it has no yogaParent, but has yogaChildren.
// - This node is a Yoga tree node: it has both a yogaParent and yogaChildren.
// - This node is a Yoga tree leaf: it has a yogaParent, but no yogaChidlren.
// If we're a leaf node, we are probably being called by a measure function and proceed as normal.
// If we're a yoga root or tree node, initiate a new Yoga calculation pass from root.
YGNodeRef yogaNode = _style.yogaNode;
BOOL hasYogaParent = (_yogaParent != nil);
BOOL hasYogaChildren = (_yogaChildren.count > 0);
BOOL usesYoga = (yogaNode != NULL && (hasYogaParent || hasYogaChildren));
if (usesYoga && (_yogaParent == nil || _yogaChildren.count > 0)) {
if (usesYoga) {
// This node has some connection to a Yoga tree.
ASDN::MutexUnlocker ul(__instanceLock__);
if (self.yogaLayoutInProgress == NO) {
[self calculateLayoutFromYogaRoot:constrainedSize];
if ([self shouldHaveYogaMeasureFunc] == NO) {
// If we're a yoga root, tree node, or leaf with no measure func (e.g. spacer), then
// initiate a new Yoga calculation pass from root.
ASDN::MutexUnlocker ul(__instanceLock__);
as_activity_create_for_scope("Yoga layout calculation");
if (self.yogaLayoutInProgress == NO) {
ASYogaLog("Calculating yoga layout from root %@, %@", self, NSStringFromASSizeRange(constrainedSize));
[self calculateLayoutFromYogaRoot:constrainedSize];
} else {
ASYogaLog("Reusing existing yoga layout %@", _yogaCalculatedLayout);
}
ASDisplayNodeAssert(_yogaCalculatedLayout, @"Yoga node should have a non-nil layout at this stage: %@", self);
return _yogaCalculatedLayout;
} else {
// If we're a yoga leaf node with custom measurement function, proceed with normal layout so layoutSpecs can run (e.g. ASButtonNode).
ASYogaLog("PROCEEDING past Yoga check to calculate ASLayout for: %@", self);
}
ASDisplayNodeAssert(_yogaCalculatedLayout, @"Yoga node should have a non-nil layout at this stage: %@", self);
return _yogaCalculatedLayout;
}
ASYogaLog(@"PROCEEDING past Yoga check to calculate ASLayout for: %@", self);
#endif /* YOGA */
// Manual size calculation via calculateSizeThatFits: