1 files changed, 145 insertions, 0 deletions
diff --git a/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.cpp b/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.cpp
new file mode 100644
index 000000000..421c7457c
--- /dev/null
+++ b/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.cpp
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2014 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
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "RemoteScrollingTree.h"
+
+#if ENABLE(ASYNC_SCROLLING)
+
+#include "RemoteLayerTreeHost.h"
+#include "RemoteScrollingCoordinatorProxy.h"
+#include <WebCore/ScrollingTreeFixedNode.h>
+#include <WebCore/ScrollingTreeStickyNode.h>
+
+#if PLATFORM(IOS)
+#include "ScrollingTreeOverflowScrollingNodeIOS.h"
+#include <WebCore/ScrollingTreeFrameScrollingNodeIOS.h>
+#else
+#include <WebCore/ScrollingTreeFrameScrollingNodeMac.h>
+#endif
+
+using namespace WebCore;
+
+namespace WebKit {
+
+Ref<RemoteScrollingTree> RemoteScrollingTree::create(RemoteScrollingCoordinatorProxy& scrollingCoordinator)
+{
+    return adoptRef(*new RemoteScrollingTree(scrollingCoordinator));
+}
+
+RemoteScrollingTree::RemoteScrollingTree(RemoteScrollingCoordinatorProxy& scrollingCoordinator)
+    : m_scrollingCoordinatorProxy(scrollingCoordinator)
+{
+}
+
+RemoteScrollingTree::~RemoteScrollingTree()
+{
+}
+
+ScrollingTree::EventResult RemoteScrollingTree::tryToHandleWheelEvent(const PlatformWheelEvent& wheelEvent)
+{
+    if (shouldHandleWheelEventSynchronously(wheelEvent))
+        return SendToMainThread;
+
+    if (willWheelEventStartSwipeGesture(wheelEvent))
+        return DidNotHandleEvent;
+
+    handleWheelEvent(wheelEvent);
+    return DidHandleEvent;
+}
+
+#if PLATFORM(MAC)
+void RemoteScrollingTree::handleWheelEventPhase(PlatformWheelEventPhase phase)
+{
+    // FIXME: hand off to m_scrollingCoordinatorProxy?
+}
+#endif
+
+#if PLATFORM(IOS)
+WebCore::FloatRect RemoteScrollingTree::fixedPositionRect()
+{
+    return m_scrollingCoordinatorProxy.customFixedPositionRect();
+}
+
+void RemoteScrollingTree::scrollingTreeNodeWillStartPanGesture()
+{
+    m_scrollingCoordinatorProxy.scrollingTreeNodeWillStartPanGesture();
+}
+    
+void RemoteScrollingTree::scrollingTreeNodeWillStartScroll()
+{
+    m_scrollingCoordinatorProxy.scrollingTreeNodeWillStartScroll();
+}
+
+void RemoteScrollingTree::scrollingTreeNodeDidEndScroll()
+{
+    m_scrollingCoordinatorProxy.scrollingTreeNodeDidEndScroll();
+}
+
+#endif
+
+void RemoteScrollingTree::scrollingTreeNodeDidScroll(ScrollingNodeID nodeID, const FloatPoint& scrollPosition, const std::optional<FloatPoint>& layoutViewportOrigin, ScrollingLayerPositionAction scrollingLayerPositionAction)
+{
+    m_scrollingCoordinatorProxy.scrollingTreeNodeDidScroll(nodeID, scrollPosition, layoutViewportOrigin, scrollingLayerPositionAction);
+}
+
+void RemoteScrollingTree::scrollingTreeNodeRequestsScroll(ScrollingNodeID nodeID, const FloatPoint& scrollPosition, bool representsProgrammaticScroll)
+{
+    m_scrollingCoordinatorProxy.scrollingTreeNodeRequestsScroll(nodeID, scrollPosition, representsProgrammaticScroll);
+}
+
+Ref<ScrollingTreeNode> RemoteScrollingTree::createScrollingTreeNode(ScrollingNodeType nodeType, ScrollingNodeID nodeID)
+{
+    switch (nodeType) {
+    case FrameScrollingNode:
+#if PLATFORM(IOS)
+        return ScrollingTreeFrameScrollingNodeIOS::create(*this, nodeID);
+#else
+        return ScrollingTreeFrameScrollingNodeMac::create(*this, nodeID);
+#endif
+    case OverflowScrollingNode:
+#if PLATFORM(IOS)
+        return ScrollingTreeOverflowScrollingNodeIOS::create(*this, nodeID);
+#else
+        ASSERT_NOT_REACHED();
+        break;
+#endif
+    case FixedNode:
+        return ScrollingTreeFixedNode::create(*this, nodeID);
+    case StickyNode:
+        return ScrollingTreeStickyNode::create(*this, nodeID);
+    }
+    ASSERT_NOT_REACHED();
+    return ScrollingTreeFixedNode::create(*this, nodeID);
+}
+
+void RemoteScrollingTree::currentSnapPointIndicesDidChange(ScrollingNodeID nodeID, unsigned horizontal, unsigned vertical)
+{
+    m_scrollingCoordinatorProxy.currentSnapPointIndicesDidChange(nodeID, horizontal, vertical);
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(ASYNC_SCROLLING)