First Implementation of Snapped Points

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

Index: third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp b/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
index 294d084a8fb4f37708c6436d4941f5eca7aa8f0a..6d2b4c5f8dde64193b9eca2267636a82b88f4a72 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp
@@ -1247,6 +1247,37 @@ TransformOrigin StyleBuilderConverter::ConvertTransformOrigin(
       StyleBuilderConverter::ConvertComputedLength<float>(state, list.Item(2)));
 }
 
+ScrollSnapType StyleBuilderConverter::ConvertSnapType(StyleResolverState&,
+                                                      const CSSValue& value) {
+  ScrollSnapType snapType = ComputedStyle::InitialScrollSnapType();
+  if (value.IsValuePair()) {
+    const CSSValuePair& pair = ToCSSValuePair(value);
+    snapType.axis = ToCSSIdentifierValue(pair.First()).ConvertTo<SnapAxis>();
+    snapType.strictness =
+        ToCSSIdentifierValue(pair.Second()).ConvertTo<SnapStrictness>();
+  } else {
+    snapType.axis = ToCSSIdentifierValue(value).ConvertTo<SnapAxis>();
+  }
+  return snapType;
+}
+
+ScrollSnapAlign StyleBuilderConverter::ConvertSnapAlign(StyleResolverState&,
+                                                        const CSSValue& value) {
+  ScrollSnapAlign snapAlign = ComputedStyle::InitialScrollSnapAlign();
+  if (value.IsValuePair()) {
+    const CSSValuePair& pair = ToCSSValuePair(value);
+    snapAlign.alignmentX =
+        ToCSSIdentifierValue(pair.First()).ConvertTo<SnapAlignment>();
+    snapAlign.alignmentY =
+        ToCSSIdentifierValue(pair.Second()).ConvertTo<SnapAlignment>();
+  } else {
+    snapAlign.alignmentX =
+        ToCSSIdentifierValue(value).ConvertTo<SnapAlignment>();
+    snapAlign.alignmentY = snapAlign.alignmentX;
+  }
+  return snapAlign;
+}
+
 ScrollSnapPoints StyleBuilderConverter::ConvertSnapPoints(
     StyleResolverState& state,
     const CSSValue& value) {