Index: third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.cpp |
diff --git a/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.cpp b/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.cpp |
index f099cdce40417819ed11a11f133cdf54b503a75f..76d5b67ae70c2cbe3db811296d95ee63ffa8e84c 100644 |
--- a/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.cpp |
+++ b/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.cpp |
@@ -3,6 +3,7 @@ |
// found in the LICENSE file. |
#include "core/page/scrolling/StickyPositionScrollingConstraints.h" |
+#include "core/paint/PaintLayer.h" |
namespace blink { |
@@ -88,4 +89,18 @@ FloatSize StickyPositionScrollingConstraints::ComputeStickyOffset( |
return sticky_offset; |
} |
+FloatSize StickyPositionScrollingConstraints::ComputeMainThreadStickyOffset( |
+ const PaintLayer& ancestor_overflow_layer) const { |
flackr
2017/06/02 15:33:58
Instead of passing in the ancestor_overflow_layer
yigu
2017/06/02 17:59:56
Done.
|
+ FloatSize nearest_sticky_box_shifting_sticky_box_constraints_offset; |
+ if (nearest_sticky_box_shifting_sticky_box_) { |
+ nearest_sticky_box_shifting_sticky_box_constraints_offset = |
+ ancestor_overflow_layer.GetScrollableArea() |
+ ->GetStickyConstraintsMap() |
+ .at(nearest_sticky_box_shifting_sticky_box_->Layer()) |
+ .GetTotalStickyBoxStickyOffset(); |
+ } |
+ return total_sticky_box_sticky_offset_ - |
+ nearest_sticky_box_shifting_sticky_box_constraints_offset; |
+} |
+ |
} // namespace blink |