| /* |
| * Copyright (C) 2006, 2007, 2009, 2010, 2011 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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 AutoscrollController_h |
| #define AutoscrollController_h |
| |
| #include "core/CoreExport.h" |
| #include "platform/geometry/IntPoint.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| class LocalFrame; |
| class FrameView; |
| class Node; |
| class Page; |
| class PlatformMouseEvent; |
| class LayoutBox; |
| class LayoutObject; |
| |
| enum AutoscrollType { |
| NoAutoscroll, |
| AutoscrollForDragAndDrop, |
| AutoscrollForSelection, |
| AutoscrollForMiddleClickCanStop, |
| AutoscrollForMiddleClick, |
| }; |
| |
| // AutscrollController handels autoscroll and middle click autoscroll for |
| // EventHandler. |
| class CORE_EXPORT AutoscrollController final |
| : public GarbageCollected<AutoscrollController> { |
| public: |
| static AutoscrollController* create(Page&); |
| DECLARE_TRACE(); |
| |
| static const int noMiddleClickAutoscrollRadius = 15; |
| |
| void animate(double monotonicFrameBeginTime); |
| bool autoscrollInProgress() const; |
| bool autoscrollInProgress(const LayoutBox*) const; |
| bool middleClickAutoscrollInProgress() const; |
| void startAutoscrollForSelection(LayoutObject*); |
| void stopAutoscroll(); |
| void stopAutoscrollIfNeeded(LayoutObject*); |
| void updateAutoscrollLayoutObject(); |
| void updateDragAndDrop(Node* targetNode, |
| const IntPoint& eventPosition, |
| double eventTime); |
| void handleMouseReleaseForMiddleClickAutoscroll(LocalFrame*, |
| const PlatformMouseEvent&); |
| void startMiddleClickAutoscroll(LayoutBox*, const IntPoint&); |
| |
| private: |
| explicit AutoscrollController(Page&); |
| |
| void startAutoscroll(); |
| |
| void updateMiddleClickAutoscrollState(FrameView*, |
| const IntPoint& lastKnownMousePosition); |
| |
| Member<Page> m_page; |
| LayoutBox* m_autoscrollLayoutObject; |
| LayoutBox* m_pressedLayoutObject; |
| AutoscrollType m_autoscrollType; |
| IntPoint m_dragAndDropAutoscrollReferencePosition; |
| double m_dragAndDropAutoscrollStartTime; |
| IntPoint m_middleClickAutoscrollStartPos; |
| }; |
| |
| } // namespace blink |
| |
| #endif // AutoscrollController_h |