webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.h b/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.h
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+++ b/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingTree.h
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+/*
+ * 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.
+ */
+
+#ifndef RemoteScrollingTree_h
+#define RemoteScrollingTree_h
+
+#if ENABLE(ASYNC_SCROLLING)
+
+#include "RemoteScrollingCoordinator.h"
+#include <WebCore/ScrollingConstraints.h>
+#include <WebCore/ScrollingTree.h>
+
+namespace WebKit {
+
+class RemoteScrollingCoordinatorProxy;
+
+class RemoteScrollingTree final : public WebCore::ScrollingTree {
+public:
+    static Ref<RemoteScrollingTree> create(RemoteScrollingCoordinatorProxy&);
+    virtual ~RemoteScrollingTree();
+
+    bool isRemoteScrollingTree() const override { return true; }
+    EventResult tryToHandleWheelEvent(const WebCore::PlatformWheelEvent&) override;
+
+    const RemoteScrollingCoordinatorProxy& scrollingCoordinatorProxy() const { return m_scrollingCoordinatorProxy; }
+
+    void scrollingTreeNodeDidScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, const std::optional<WebCore::FloatPoint>& layoutViewportOrigin, WebCore::ScrollingLayerPositionAction = WebCore::ScrollingLayerPositionAction::Sync) override;
+    void scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, bool representsProgrammaticScroll) override;
+
+    void currentSnapPointIndicesDidChange(WebCore::ScrollingNodeID, unsigned horizontal, unsigned vertical) override;
+
+private:
+    explicit RemoteScrollingTree(RemoteScrollingCoordinatorProxy&);
+
+#if PLATFORM(MAC)
+    void handleWheelEventPhase(WebCore::PlatformWheelEventPhase) override;
+#endif
+
+#if PLATFORM(IOS)
+    WebCore::FloatRect fixedPositionRect() override;
+    void scrollingTreeNodeWillStartPanGesture() override;
+    void scrollingTreeNodeWillStartScroll() override;
+    void scrollingTreeNodeDidEndScroll() override;
+#endif
+
+    Ref<WebCore::ScrollingTreeNode> createScrollingTreeNode(WebCore::ScrollingNodeType, WebCore::ScrollingNodeID) override;
+    
+    RemoteScrollingCoordinatorProxy& m_scrollingCoordinatorProxy;
+};
+
+} // namespace WebKit
+
+SPECIALIZE_TYPE_TRAITS_SCROLLING_TREE(WebKit::RemoteScrollingTree, isRemoteScrollingTree());
+
+#endif // ENABLE(ASYNC_SCROLLING)
+
+#endif // RemoteScrollingTree_h