CSS Motion Path: offset-anchor and offset-position

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 796 matching lines @@
 
 LengthPoint StyleBuilderConverter::convertPosition(StyleResolverState& state, const CSSValue& value)
 {
     const CSSValuePair& pair = toCSSValuePair(value);
     return LengthPoint(
         convertPositionLength<CSSValueLeft, CSSValueRight>(state, pair.first()),
         convertPositionLength<CSSValueTop, CSSValueBottom>(state, pair.second())
     );
 }
 
+LengthPoint StyleBuilderConverter::convertPositionOrAuto(StyleResolverState& state, const CSSValue& value)
+{
+    if (value.isValuePair())
+        return convertPosition(state, value);
+    DCHECK(toCSSPrimitiveValue(value).getValueID() == CSSValueAuto);
+    return LengthPoint(Length(Auto), Length(Auto));
+}
+
 static float convertPerspectiveLength(StyleResolverState& state, const CSSPrimitiveValue& primitiveValue)
 {
     return std::max(primitiveValue.computeLength<float>(state.cssToLengthConversionData()), 0.0f);
 }
 
 float StyleBuilderConverter::convertPerspective(StyleResolverState& state, const CSSValue& value)
 {
     const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
 
     if (primitiveValue.getValueID() == CSSValueNone)
@@ skipping 274 matching lines @@
     return nullptr;
 }
 
 const CSSValue& StyleBuilderConverter::convertRegisteredPropertyValue(const StyleResolverState& state, const CSSValue& value)
 {
     // TODO(timloh): Resolve ems, etc.
     return value;
 }
 
 } // namespace blink