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Reset the hadOverflow flag at the beginning of the algorithm

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Summary:
This fixes the case where we change the layout, so that it doesn't overflow anymore.

This also improves the readability by using `|=` instead of referencing the value twice.
Closes https://github.com/facebook/yoga/pull/587

Differential Revision: D5388657

Pulled By: emilsjolander

fbshipit-source-id: ce1b1ded1feed7314a2c16bf695f62b866c19ea0
This commit is contained in:
Lukas Wöhrl
2017-07-10 11:49:21 -07:00
committed by Facebook Github Bot
parent 24e2fc95dd
commit 7640cd667f
2 changed files with 29 additions and 2 deletions
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24
tests/YGHadOverflowTest.cpp
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@@ -80,6 +80,30 @@ TEST_F(YogaTest_HadOverflowTests, no_overflow_no_wrap_and_flex_children) {
ASSERT_FALSE(YGNodeLayoutGetHadOverflow(root));
}
TEST_F(YogaTest_HadOverflowTests, hadOverflow_gets_reset_if_not_logger_valid) {
const YGNodeRef child0 = YGNodeNewWithConfig(config);
YGNodeStyleSetWidth(child0, 80);
YGNodeStyleSetHeight(child0, 40);
YGNodeStyleSetMargin(child0, YGEdgeTop, 10);
YGNodeStyleSetMargin(child0, YGEdgeBottom, 10);
YGNodeInsertChild(root, child0, 0);
const YGNodeRef child1 = YGNodeNewWithConfig(config);
YGNodeStyleSetWidth(child1, 80);
YGNodeStyleSetHeight(child1, 40);
YGNodeStyleSetMargin(child1, YGEdgeBottom, 5);
YGNodeInsertChild(root, child1, 1);
YGNodeCalculateLayout(root, 200, 100, YGDirectionLTR);
ASSERT_TRUE(YGNodeLayoutGetHadOverflow(root));
YGNodeStyleSetFlexShrink(child1, 1);
YGNodeCalculateLayout(root, 200, 100, YGDirectionLTR);
ASSERT_FALSE(YGNodeLayoutGetHadOverflow(root));
}
TEST_F(YogaTest_HadOverflowTests, spacing_overflow_in_nested_nodes) {
const YGNodeRef child0 = YGNodeNewWithConfig(config);
YGNodeStyleSetWidth(child0, 80);

7
yoga/Yoga.c
View File

@@ -2041,6 +2041,9 @@ static void YGNodelayoutImpl(const YGNodeRef node,
return;
}
// Reset layout flags, as they could have changed.
node->layout.hadOverflow = false;
// STEP 1: CALCULATE VALUES FOR REMAINDER OF ALGORITHM
const YGFlexDirection mainAxis = YGResolveFlexDirection(node->style.flexDirection, direction);
const YGFlexDirection crossAxis = YGFlexDirectionCross(mainAxis, direction);
@@ -2577,14 +2580,14 @@ static void YGNodelayoutImpl(const YGNodeRef node,
performLayout && !requiresStretchLayout,
"flex",
config);
node->layout.hadOverflow = node->layout.hadOverflow || currentRelativeChild->layout.hadOverflow;
node->layout.hadOverflow |= currentRelativeChild->layout.hadOverflow;
currentRelativeChild = currentRelativeChild->nextChild;
}
}
remainingFreeSpace = originalRemainingFreeSpace + deltaFreeSpace;
node->layout.hadOverflow = node->layout.hadOverflow || (remainingFreeSpace < 0);
node->layout.hadOverflow |= (remainingFreeSpace < 0);
// STEP 6: MAIN-AXIS JUSTIFICATION & CROSS-AXIS SIZE DETERMINATION