Compute snap offsets according to CSS Scroll Snap Spec Level 1

third_party/WebKit/Source/platform/LengthFunctions.cpp

 /*
     Copyright (C) 1999 Lars Knoll (knoll@kde.org)
     Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
     Copyright (C) 2011 Rik Cabanier (cabanier@adobe.com)
     Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
     Copyright (C) 2012 Motorola Mobility, Inc. All rights reserved.
 
     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
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "platform/LengthFunctions.h"
 
 #include "platform/LayoutUnit.h"
+#include "platform/LengthPoint.h"
 #include "platform/LengthSize.h"
 
 namespace blink {
 
 int intValueForLength(const Length& length, int maximumValue)
 {
     return static_cast<int>(valueForLength(length, LayoutUnit(maximumValue)));
 }
 
 float floatValueForLength(const Length& length, float maximumValue)
@@ skipping 78 matching lines @@
     }
     ASSERT_NOT_REACHED();
     return LayoutUnit();
 }
 
 FloatSize floatSizeForLengthSize(const LengthSize& lengthSize, const FloatSize& boxSize)
 {
     return FloatSize(floatValueForLength(lengthSize.width(), boxSize.width()), floatValueForLength(lengthSize.height(), boxSize.height()));
 }
 
+FloatPoint floatPointForLengthPoint(const LengthPoint& LengthPoint, const FloatSize& boxSize)
+{
+    return FloatPoint(floatValueForLength(LengthPoint.x(), boxSize.width()), floatValueForLength(LengthPoint.y(), boxSize.height()));
+}
+
 } // namespace blink