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Mark all children as dirty if display changes

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Summary:
If we set ```display:none``` all children are set with layout sizes/values of 0. We need do mark all those children as dirty to force a relayout if we toggle the display on a higher parent node. This fixes #443
Closes https://github.com/facebook/yoga/pull/448

Reviewed By: astreet

Differential Revision: D4642273

Pulled By: emilsjolander

fbshipit-source-id: dfdb920e2049952bd6c7f48cfa53b1448e1f3e8f
This commit is contained in:
Lukas Wöhrl
2017-03-03 10:31:47 -08:00
committed by Facebook Github Bot
parent feb365a77b
commit a706f4c97c
2 changed files with 54 additions and 0 deletions
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48
tests/YGDirtyMarkingTest.cpp
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@@ -70,6 +70,54 @@ TEST(YogaTest, dirty_propagation_only_if_prop_changed) {
YGNodeFreeRecursive(root);
}
TEST(Yogatest, dirty_mark_all_children_as_dirty_when_display_changes){
const YGNodeRef root = YGNodeNew();
YGNodeStyleSetFlexDirection(root, YGFlexDirectionRow);
YGNodeStyleSetHeight(root, 100);
const YGNodeRef child0 = YGNodeNew();
YGNodeStyleSetFlexGrow(child0, 1);
const YGNodeRef child1 = YGNodeNew();
YGNodeStyleSetFlexGrow(child1, 1);
const YGNodeRef child1_child0 = YGNodeNew();
const YGNodeRef child1_child0_child0 = YGNodeNew();
YGNodeStyleSetWidth(child1_child0_child0, 8);
YGNodeStyleSetHeight(child1_child0_child0, 16);
YGNodeInsertChild(child1_child0, child1_child0_child0, 0);
YGNodeInsertChild(child1, child1_child0, 0);
YGNodeInsertChild(root, child0, 0);
YGNodeInsertChild(root, child1, 0);
YGNodeStyleSetDisplay(child0, YGDisplayFlex);
YGNodeStyleSetDisplay(child1, YGDisplayNone);
YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
ASSERT_FLOAT_EQ(0, YGNodeLayoutGetWidth(child1_child0_child0));
ASSERT_FLOAT_EQ(0, YGNodeLayoutGetHeight(child1_child0_child0));
YGNodeStyleSetDisplay(child0, YGDisplayNone);
YGNodeStyleSetDisplay(child1, YGDisplayFlex);
YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
ASSERT_FLOAT_EQ(8, YGNodeLayoutGetWidth(child1_child0_child0));
ASSERT_FLOAT_EQ(16, YGNodeLayoutGetHeight(child1_child0_child0));
YGNodeStyleSetDisplay(child0, YGDisplayFlex);
YGNodeStyleSetDisplay(child1, YGDisplayNone);
YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
ASSERT_FLOAT_EQ(0, YGNodeLayoutGetWidth(child1_child0_child0));
ASSERT_FLOAT_EQ(0, YGNodeLayoutGetHeight(child1_child0_child0));
YGNodeStyleSetDisplay(child0, YGDisplayNone);
YGNodeStyleSetDisplay(child1, YGDisplayFlex);
YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
ASSERT_FLOAT_EQ(8, YGNodeLayoutGetWidth(child1_child0_child0));
ASSERT_FLOAT_EQ(16, YGNodeLayoutGetHeight(child1_child0_child0));
YGNodeFreeRecursive(root);
}
TEST(YogaTest, dirty_node_only_if_children_are_actually_removed) {
const YGNodeRef root = YGNodeNew();
YGNodeStyleSetAlignItems(root, YGAlignFlexStart);