Switch AutoscrollController to use animation system instead of timer

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 20 matching lines @@
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/editing/htmlediting.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/html/HTMLTextAreaElement.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
+#include "core/page/AutoscrollController.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Page.h"
 #include "core/platform/graphics/GraphicsContextStateSaver.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/RenderBoxRegionInfo.h"
 #include "core/rendering/RenderFlexibleBox.h"
 #include "core/rendering/RenderFlowThread.h"
 #include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderGrid.h"
@@ skipping 462 matching lines @@
 
     // If scrollbars are forbidden, user initiated scrolls should obviously be ignored.
     if (frameView->wasScrolledByUser())
         return false;
 
     // Forbid autoscrolls when scrollbars are off, but permits other programmatic scrolls,
     // like navigation to an anchor.
     Page* page = frameView->frame().page();
     if (!page)
         return false;
-    return !page->autoscrollInProgress();
+    return !page->autoscrollController().autoscrollInProgress();
 }
 
 void RenderBox::scrollRectToVisible(const LayoutRect& rect, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
 {
     RenderBox* parentBox = 0;
     LayoutRect newRect = rect;
 
     bool restrictedByLineClamp = false;
     if (parent()) {
         parentBox = parent()->enclosingBox();
@@ skipping 36 matching lines @@
                     }
                 }
             } else {
                 LayoutRect viewRect = frameView->visibleContentRect();
                 LayoutRect r = ScrollAlignment::getRectToExpose(viewRect, rect, alignX, alignY);
                 frameView->setScrollPosition(roundedIntPoint(r.location()));
             }
         }
     }
 
-    if (frame()->page()->autoscrollInProgress())
+    if (frame()->page()->autoscrollController().autoscrollInProgress())
         parentBox = enclosingScrollableBox();
 
     if (parentBox)
         parentBox->scrollRectToVisible(newRect, alignX, alignY);
 }
 
 void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
 {
     rects.append(pixelSnappedIntRect(accumulatedOffset, size()));
 }
@@ skipping 271 matching lines @@
     FrameView* frameView = frame->view();
     if (!frameView)
         return;
 
     IntPoint currentDocumentPosition = frameView->windowToContents(position);
     scrollRectToVisible(LayoutRect(currentDocumentPosition, LayoutSize(1, 1)), ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
 }
 
 bool RenderBox::autoscrollInProgress() const
 {
-    return frame() && frame()->page() && frame()->page()->autoscrollInProgress(this);
+    return frame() && frame()->page() && frame()->page()->autoscrollController().autoscrollInProgress(this);
 }
 
 // There are two kinds of renderer that can autoscroll.
 bool RenderBox::canAutoscroll() const
 {
     if (node() && node()->isDocumentNode())
         return view()->frameView()->isScrollable();
 
     // Check for a box that can be scrolled in its own right.
     return canBeScrolledAndHasScrollableArea();
@@ skipping 100 matching lines @@
         layer()->scrollableArea()->scrollToOffset(newScrollOffset, clamp);
 
         // If this layer can't do the scroll we ask the next layer up that can scroll to try
         IntSize remainingScrollOffset = newScrollOffset - layer()->scrollableArea()->adjustedScrollOffset();
         if (!remainingScrollOffset.isZero() && parent()) {
             if (RenderBox* scrollableBox = enclosingScrollableBox())
                 scrollableBox->scrollByRecursively(remainingScrollOffset, clamp);
 
             Frame* frame = this->frame();
             if (frame && frame->page())
-                frame->page()->updateAutoscrollRenderer();
+                frame->page()->autoscrollController().updateAutoscrollRenderer();
         }
     } else if (view()->frameView()) {
         // If we are here, we were called on a renderer that can be programmatically scrolled, but doesn't
         // have an overflow clip. Which means that it is a document node that can be scrolled.
         view()->frameView()->scrollBy(delta);
 
         // FIXME: If we didn't scroll the whole way, do we want to try looking at the frames ownerElement?
         // https://bugs.webkit.org/show_bug.cgi?id=28237
     }
 }
@@ skipping 3970 matching lines @@
         return 0;
 
     if (!layoutState && !flowThreadContainingBlock())
         return 0;
 
     RenderBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
 } // namespace WebCore