Index: Source/core/css/SiblingTraversalStrategies.h |
diff --git a/Source/core/css/SiblingTraversalStrategies.h b/Source/core/css/SiblingTraversalStrategies.h |
index e63a66185ae4ff48e4ccace4008fe6d8adff2fea..1e008dba5fda36e1c053fe4b5b43ba61e10e51af 100644 |
--- a/Source/core/css/SiblingTraversalStrategies.h |
+++ b/Source/core/css/SiblingTraversalStrategies.h |
@@ -29,8 +29,10 @@ |
#ifndef SiblingTraversalStrategies_h |
#define SiblingTraversalStrategies_h |
+#include "core/dom/Document.h" |
#include "core/dom/Element.h" |
#include "core/dom/ElementTraversal.h" |
+#include "core/dom/NthIndexCache.h" |
#include "core/style/ComputedStyle.h" |
namespace blink { |
@@ -79,6 +81,9 @@ inline bool DOMSiblingTraversalStrategy::isLastOfType(Element& element, const Qu |
inline int DOMSiblingTraversalStrategy::countElementsBefore(Element& element) const |
{ |
+ if (NthIndexCache* nthIndexCache = element.document().nthIndexCache()) |
+ return nthIndexCache->nthChildIndex(element) - 1; |
+ |
int count = 0; |
for (const Element* sibling = ElementTraversal::previousSibling(element); sibling; sibling = ElementTraversal::previousSibling(*sibling)) |
count++; |
@@ -96,6 +101,9 @@ inline int DOMSiblingTraversalStrategy::countElementsOfTypeBefore(Element& eleme |
inline int DOMSiblingTraversalStrategy::countElementsAfter(Element& element) const |
{ |
+ if (NthIndexCache* nthIndexCache = element.document().nthIndexCache()) |
+ return nthIndexCache->nthLastChildIndex(element) - 1; |
+ |
int count = 0; |
for (const Element* sibling = ElementTraversal::nextSibling(element); sibling; sibling = ElementTraversal::nextSibling(*sibling)) |
++count; |