Remove position: sticky

Source/core/page/scrolling/ScrollingConstraints.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
         offset.setWidth(viewportRect.maxX() - m_viewportRectAtLastLayout.maxX());
 
     if (hasAnchorEdge(AnchorEdgeTop))
         offset.setHeight(viewportRect.y() - m_viewportRectAtLastLayout.y());
     else if (hasAnchorEdge(AnchorEdgeBottom))
         offset.setHeight(viewportRect.maxY() - m_viewportRectAtLastLayout.maxY());
 
     return m_layerPositionAtLastLayout + offset;
 }
 
-FloatSize StickyPositionViewportConstraints::computeStickyOffset(const FloatRect& viewportRect) const
-{
-    FloatRect boxRect = m_absoluteStickyBoxRect;
-
-    if (hasAnchorEdge(AnchorEdgeRight)) {
-        float rightLimit = viewportRect.maxX() - m_rightOffset;
-        float rightDelta = std::min<float>(0, rightLimit - m_absoluteStickyBoxRect.maxX());
-        float availableSpace = std::min<float>(0, m_absoluteContainingBlockRect.x() - m_absoluteStickyBoxRect.x());
-        if (rightDelta < availableSpace)
-            rightDelta = availableSpace;
-
-        boxRect.move(rightDelta, 0);
-    }
-
-    if (hasAnchorEdge(AnchorEdgeLeft)) {
-        float leftLimit = viewportRect.x() + m_leftOffset;
-        float leftDelta = std::max<float>(0, leftLimit - m_absoluteStickyBoxRect.x());
-        float availableSpace = std::max<float>(0, m_absoluteContainingBlockRect.maxX() - m_absoluteStickyBoxRect.maxX());
-        if (leftDelta > availableSpace)
-            leftDelta = availableSpace;
-
-        boxRect.move(leftDelta, 0);
-    }
-
-    if (hasAnchorEdge(AnchorEdgeBottom)) {
-        float bottomLimit = viewportRect.maxY() - m_bottomOffset;
-        float bottomDelta = std::min<float>(0, bottomLimit - m_absoluteStickyBoxRect.maxY());
-        float availableSpace = std::min<float>(0, m_absoluteContainingBlockRect.y() - m_absoluteStickyBoxRect.y());
-        if (bottomDelta < availableSpace)
-            bottomDelta = availableSpace;
-
-        boxRect.move(0, bottomDelta);
-    }
-
-    if (hasAnchorEdge(AnchorEdgeTop)) {
-        float topLimit = viewportRect.y() + m_topOffset;
-        float topDelta = std::max<float>(0, topLimit - m_absoluteStickyBoxRect.y());
-        float availableSpace = std::max<float>(0, m_absoluteContainingBlockRect.maxY() - m_absoluteStickyBoxRect.maxY());
-        if (topDelta > availableSpace)
-            topDelta = availableSpace;
-
-        boxRect.move(0, topDelta);
-    }
-
-    return boxRect.location() - m_absoluteStickyBoxRect.location();
-}
-
-FloatPoint StickyPositionViewportConstraints::layerPositionForViewportRect(const FloatRect& viewportRect) const
-{
-    FloatSize offset = computeStickyOffset(viewportRect);
-    return m_layerPositionAtLastLayout + offset - m_stickyOffsetAtLastLayout;
-}
-
 } // namespace WebCore