Remove more scrolling code from Sky

sky/engine/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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.
@@ skipping 30 matching lines @@
 #include "sky/engine/core/editing/htmlediting.h"
 #include "sky/engine/core/events/DOMWindowEventQueue.h"
 #include "sky/engine/core/events/EventPath.h"
 #include "sky/engine/core/events/KeyboardEvent.h"
 #include "sky/engine/core/events/TextEvent.h"
 #include "sky/engine/core/fetch/ImageResource.h"
 #include "sky/engine/core/frame/FrameView.h"
 #include "sky/engine/core/frame/LocalFrame.h"
 #include "sky/engine/core/frame/Settings.h"
 #include "sky/engine/core/loader/FrameLoaderClient.h"
-#include "sky/engine/core/page/AutoscrollController.h"
 #include "sky/engine/core/page/ChromeClient.h"
 #include "sky/engine/core/page/EditorClient.h"
 #include "sky/engine/core/page/FocusController.h"
 #include "sky/engine/core/page/Page.h"
 #include "sky/engine/core/rendering/HitTestRequest.h"
 #include "sky/engine/core/rendering/HitTestResult.h"
 #include "sky/engine/core/rendering/RenderLayer.h"
 #include "sky/engine/core/rendering/RenderView.h"
 #include "sky/engine/core/rendering/style/RenderStyle.h"
 #include "sky/engine/platform/TraceEvent.h"
@@ skipping 129 matching lines @@
                 end.moveToOffset(markers[0]->endOffset());
                 newSelection = VisibleSelection(start, end);
             }
         }
 
         if (appendTrailingWhitespace == ShouldAppendTrailingWhitespace && newSelection.isRange())
             newSelection.appendTrailingWhitespace();
     }
 }
 
-AutoscrollController* EventHandler::autoscrollController() const
-{
-    if (Page* page = m_frame->page())
-        return &page->autoscrollController();
-    return 0;
-}
-
 HitTestResult EventHandler::hitTestResultAtPoint(const LayoutPoint& point, HitTestRequest::HitTestRequestType hitType, const LayoutSize& padding)
 {
     TRACE_EVENT0("blink", "EventHandler::hitTestResultAtPoint");
 
     HitTestResult result(point, padding.height(), padding.width(), padding.height(), padding.width());
 
     // RenderView::hitTest causes a layout, and we don't want to hit that until the first
     // layout because until then, there is nothing shown on the screen - the user can't
     // have intentionally clicked on something belonging to this page. Furthermore,
     // mousemove events before the first layout should not lead to a premature layout()
     // happening, which could show a flash of white.
     // See also the similar code in Document::prepareMouseEvent.
     if (!m_frame->contentRenderer() || !m_frame->view() || !m_frame->view()->didFirstLayout())
         return result;
 
     // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content.
     HitTestRequest request(hitType);
     m_frame->contentRenderer()->hitTest(request, result);
 
     return result;
 }
 
-void EventHandler::stopAutoscroll()
-{
-    if (AutoscrollController* controller = autoscrollController())
-        controller->stopAutoscroll();
-}
-
-bool EventHandler::scroll(ScrollDirection direction, ScrollGranularity granularity, Node* startNode, Node** stopNode, float delta, IntPoint absolutePoint)
-{
-    if (!delta)
-        return false;
-
-    Node* node = startNode;
-
-    if (!node)
-        node = m_frame->document()->focusedElement();
-
-    if (!node || !node->renderer())
-        return false;
-
-    RenderBox* curBox = node->renderer()->enclosingBox();
-    while (curBox && !curBox->isRenderView()) {
-        // If we're at the stopNode, we should try to scroll it but we shouldn't bubble past it
-        bool shouldStopBubbling = stopNode && *stopNode && curBox->node() == *stopNode;
-        bool didScroll = curBox->scroll(direction, granularity, delta);
-
-        if (didScroll && stopNode)
-            *stopNode = curBox->node();
-
-        if (didScroll || shouldStopBubbling) {
-            return true;
-        }
-
-        curBox = curBox->containingBlock();
-    }
-
-    return false;
-}
-
-bool EventHandler::bubblingScroll(ScrollDirection direction, ScrollGranularity granularity, Node* startingNode)
-{
-    // The layout needs to be up to date to determine if we can scroll. We may be
-    // here because of an onLoad event, in which case the final layout hasn't been performed yet.
-    m_frame->document()->updateLayout();
-    if (scroll(direction, granularity, startingNode))
-        return true;
-    return false;
-}
-
 bool EventHandler::useHandCursor(Node* node, bool isOverLink)
 {
     if (!node)
         return false;
 
     return isOverLink && !node->hasEditableStyle();
 }
 
 void EventHandler::cursorUpdateTimerFired(Timer<EventHandler>*)
 {
@@ skipping 289 matching lines @@
     // and exclude any prohibited actions.
     TouchAction effectiveTouchAction = TouchActionAuto;
     for (const Node* curNode = &node; curNode; curNode = NodeRenderingTraversal::parent(curNode)) {
         if (RenderObject* renderer = curNode->renderer()) {
             if (renderer->supportsTouchAction()) {
                 TouchAction action = renderer->style()->touchAction();
                 effectiveTouchAction = intersectTouchAction(action, effectiveTouchAction);
                 if (effectiveTouchAction == TouchActionNone)
                     break;
             }
-
-            // If we've reached an ancestor that supports a touch action, search no further.
-            if (renderer->isBox() && toRenderBox(renderer)->scrollsOverflow())
-                break;
         }
     }
     return effectiveTouchAction;
 }
 
 void EventHandler::focusDocumentView()
 {
     Page* page = m_frame->page();
     if (!page)
         return;
     page->focusController().focusDocumentView(m_frame);
 }
 
 } // namespace blink