First Implementation of Snapped Points

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 1229 matching lines @@
   DCHECK(list.Item(0).IsPrimitiveValue() || list.Item(0).IsIdentifierValue());
   DCHECK(list.Item(1).IsPrimitiveValue() || list.Item(1).IsIdentifierValue());
   DCHECK(list.Item(2).IsPrimitiveValue());
 
   return TransformOrigin(
       ConvertPositionLength<CSSValueLeft, CSSValueRight>(state, list.Item(0)),
       ConvertPositionLength<CSSValueTop, CSSValueBottom>(state, list.Item(1)),
       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) {
   // Handles: none | repeat(<length>)
   ScrollSnapPoints points;
   points.has_repeat = false;
 
   if (!value.IsFunctionValue())
     return points;
 
@@ skipping 163 matching lines @@
 }
 
 const CSSValue& StyleBuilderConverter::ConvertRegisteredPropertyValue(
     const StyleResolverState& state,
     const CSSValue& value) {
   return ComputeRegisteredPropertyValue(state.CssToLengthConversionData(),
                                         value);
 }
 
 }  // namespace blink