Parsing CSS properties for scroll snap points

Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 1307 matching lines @@
         default:
             ASSERT_NOT_REACHED();
             break;
         }
         list->append(filterValue.release());
     }
 
     return list.release();
 }
 
+static PassRefPtrWillBeRawPtr<CSSValue> valueForScrollSnapDestination(const LengthPoint& destination, const ComputedStyle& style)
+{
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    list->append(zoomAdjustedPixelValueForLength(destination.x(), style));
+    list->append(zoomAdjustedPixelValueForLength(destination.y(), style));
+    return list.release();
+}
+
+static PassRefPtrWillBeRawPtr<CSSValue> valueForScrollSnapPoints(const ScrollSnapPoints& points, const ComputedStyle& style)
+{
+    if (points.hasRepeat) {
+        RefPtrWillBeRawPtr<CSSFunctionValue> repeat = CSSFunctionValue::create(CSSValueRepeat);
+        repeat->append(zoomAdjustedPixelValueForLength(points.repeatOffset, style));
+        return repeat.release();
+    }
+
+    return cssValuePool().createIdentifierValue(CSSValueNone);
+}
+
+static PassRefPtrWillBeRawPtr<CSSValue> valueForScrollSnapCoordinate(const Vector<LengthPoint>& coordinates, const ComputedStyle& style)
+{
+    if (coordinates.isEmpty())
+        return cssValuePool().createIdentifierValue(CSSValueNone);
+
+    RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+
+    for (auto& coordinate : coordinates) {
+        auto pair = CSSValueList::createSpaceSeparated();
+        pair->append(zoomAdjustedPixelValueForLength(coordinate.x(), style));
+        pair->append(zoomAdjustedPixelValueForLength(coordinate.y(), style));
+        list->append(pair);
+    }
+
+    return list.release();
+}
+
+
 PassRefPtrWillBeRawPtr<CSSValue> ComputedStyleCSSValueMapping::get(CSSPropertyID propertyID, const ComputedStyle& style, const LayoutObject* layoutObject, Node* styledNode, bool allowVisitedStyle)
 {
     const SVGComputedStyle& svgStyle = style.svgStyle();
     propertyID = CSSProperty::resolveDirectionAwareProperty(propertyID, style.direction(), style.writingMode());
     switch (propertyID) {
     case CSSPropertyInvalid:
         return nullptr;
 
     case CSSPropertyBackgroundColor:
         return allowVisitedStyle ? cssValuePool().createColorValue(style.visitedDependentColor(CSSPropertyBackgroundColor).rgb()) : currentColorOrValidColor(style, style.backgroundColor());
@@ skipping 1239 matching lines @@
     case CSSPropertyX:
         return zoomAdjustedPixelValueForLength(svgStyle.x(), style);
     case CSSPropertyY:
         return zoomAdjustedPixelValueForLength(svgStyle.y(), style);
     case CSSPropertyR:
         return zoomAdjustedPixelValueForLength(svgStyle.r(), style);
     case CSSPropertyRx:
         return zoomAdjustedPixelValueForLength(svgStyle.rx(), style);
     case CSSPropertyRy:
         return zoomAdjustedPixelValueForLength(svgStyle.ry(), style);
+    case CSSPropertyScrollSnapType:
+        return cssValuePool().createValue(style.scrollSnapType());
+    case CSSPropertyScrollSnapPointsX:
+        return valueForScrollSnapPoints(style.scrollSnapPointsX(), style);
+    case CSSPropertyScrollSnapPointsY:
+        return valueForScrollSnapPoints(style.scrollSnapPointsY(), style);
+    case CSSPropertyScrollSnapCoordinate:
+        return valueForScrollSnapCoordinate(style.scrollSnapCoordinate(), style);
+    case CSSPropertyScrollSnapDestination:
+        return valueForScrollSnapDestination(style.scrollSnapDestination(), style);
 
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }