Compute snap offsets according to CSS Scroll Snap Spec Level 1

third_party/WebKit/Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1006 matching lines @@
     void setIsolation(EIsolation v) { rareNonInheritedData.access()->m_isolation = v; }
     bool hasIsolation() const { return isolation() != IsolationAuto; }
 
     bool shouldPlaceBlockDirectionScrollbarOnLogicalLeft() const { return !isLeftToRightDirection() && isHorizontalWritingMode(); }
 
     TouchAction getTouchAction() const { return static_cast<TouchAction>(rareNonInheritedData->m_touchAction); }
 
     ScrollBehavior getScrollBehavior() const { return static_cast<ScrollBehavior>(rareNonInheritedData->m_scrollBehavior); }
 
     ScrollSnapType getScrollSnapType() const { return static_cast<ScrollSnapType>(rareNonInheritedData->m_scrollSnapType); }
-    ScrollSnapPoints scrollSnapPointsX() const { return rareNonInheritedData->m_scrollSnap->m_xPoints; }
-    ScrollSnapPoints scrollSnapPointsY() const { return rareNonInheritedData->m_scrollSnap->m_yPoints; }
-    Vector<LengthPoint> scrollSnapCoordinate() const { return rareNonInheritedData->m_scrollSnap->m_coordinates; }
-    LengthPoint scrollSnapDestination() const { return rareNonInheritedData->m_scrollSnap->m_destination; }
+    const ScrollSnapPoints& scrollSnapPointsX() const { return rareNonInheritedData->m_scrollSnap->m_xPoints; }
+    const ScrollSnapPoints& scrollSnapPointsY() const { return rareNonInheritedData->m_scrollSnap->m_yPoints; }
+    const Vector<LengthPoint>& scrollSnapCoordinate() const { return rareNonInheritedData->m_scrollSnap->m_coordinates; }
+    const LengthPoint& scrollSnapDestination() const { return rareNonInheritedData->m_scrollSnap->m_destination; }
 
     const Vector<CSSPropertyID>& willChangeProperties() const { return rareNonInheritedData->m_willChange->m_properties; }
     bool willChangeContents() const { return rareNonInheritedData->m_willChange->m_contents; }
     bool willChangeScrollPosition() const { return rareNonInheritedData->m_willChange->m_scrollPosition; }
     bool hasWillChangeCompositingHint() const;
     bool hasWillChangeTransformHint() const;
     bool subtreeWillChangeContents() const { return rareInheritedData->m_subtreeWillChangeContents; }
 
 // attribute setter methods
 
@@ skipping 998 matching lines @@
 }
 
 inline bool ComputedStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags.pseudoBits & ElementPseudoIdMask;
 }
 
 } // namespace blink
 
 #endif // ComputedStyle_h