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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef ScrollbarThemeMac_h
     27 #define ScrollbarThemeMac_h
     28 
     29 #include "ScrollbarThemeComposite.h"
     30 #include "WebCoreSystemInterface.h"
     31 
     32 namespace WebCore {
     33 
     34 class ScrollbarThemeMac : public ScrollbarThemeComposite {
     35 public:
     36     ScrollbarThemeMac();
     37     virtual ~ScrollbarThemeMac();
     38 
     39     virtual bool paint(Scrollbar*, GraphicsContext* context, const IntRect& damageRect);
     40 
     41     virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar);
     42 
     43     virtual bool supportsControlTints() const { return true; }
     44     virtual bool usesOverlayScrollbars() const;
     45 
     46     virtual double initialAutoscrollTimerDelay();
     47     virtual double autoscrollTimerDelay();
     48 
     49     virtual ScrollbarButtonsPlacement buttonsPlacement() const;
     50 
     51     virtual void registerScrollbar(Scrollbar*);
     52     virtual void unregisterScrollbar(Scrollbar*);
     53 
     54 #if USE(WK_SCROLLBAR_PAINTER)
     55     void setNewPainterForScrollbar(Scrollbar*, WKScrollbarPainterRef);
     56     WKScrollbarPainterRef painterForScrollbar(Scrollbar*);
     57 #endif
     58 
     59 protected:
     60     virtual bool hasButtons(Scrollbar*);
     61     virtual bool hasThumb(Scrollbar*);
     62 
     63     virtual IntRect backButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
     64     virtual IntRect forwardButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
     65     virtual IntRect trackRect(Scrollbar*, bool painting = false);
     66 
     67     virtual int maxOverlapBetweenPages() { return 40; }
     68 
     69     virtual int minimumThumbLength(Scrollbar*);
     70 
     71     virtual bool shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent&);
     72 
     73 public:
     74     void preferencesChanged();
     75 };
     76 
     77 }
     78 
     79 #endif
     80