WIP: snap-width

third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp b/third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp
index c6bc94a57fcb2167244e9dada8154dd6dbf51d19..040ca6f7a22aac602f71ebffd7c2b9b890273815 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp
@@ -408,6 +408,26 @@ void StyleBuilderFunctions::applyValueCSSPropertySnapHeight(StyleResolverState&
     state.style()->setSnapHeightPosition(position);
 }
 
+void StyleBuilderFunctions::applyInitialCSSPropertySnapWidth(StyleResolverState& state)
+{
+    state.style()->setSnapWidth(LayoutUnit());
+}
+
+void StyleBuilderFunctions::applyInheritCSSPropertySnapWidth(StyleResolverState& state)
+{
+    state.style()->setSnapWidth(state.parentStyle()->snapWidth());
+}
+
+void StyleBuilderFunctions::applyValueCSSPropertySnapWidth(StyleResolverState& state, CSSValue* value)
+{
+    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
+    ASSERT(primitiveValue->isLength());
+    LayoutUnit unit = LayoutUnit::fromFloatCeil(primitiveValue->computeLength<float>(state.cssToLengthConversionData()));
+    ASSERT(unit >= 0);
+    const int kMaxSnapWidth = (1 << StyleRareNonInheritedData::kSnapWidthBits) - 1;
+    state.style()->setSnapWidth(std::min(unit, LayoutUnit(kMaxSnapWidth)));
+}
+
 void StyleBuilderFunctions::applyValueCSSPropertyTextAlign(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);