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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 ScrollbarThemeMacCommon_h
     27 #define ScrollbarThemeMacCommon_h
     28 
     29 #include "platform/mac/NSScrollerImpDetails.h"
     30 #include "platform/scroll/ScrollbarTheme.h"
     31 
     32 namespace WebCore {
     33 
     34 class Pattern;
     35 
     36 class PLATFORM_EXPORT ScrollbarThemeMacCommon : public ScrollbarTheme {
     37 public:
     38     virtual ~ScrollbarThemeMacCommon();
     39 
     40     virtual void registerScrollbar(ScrollbarThemeClient*) OVERRIDE;
     41     virtual void unregisterScrollbar(ScrollbarThemeClient*) OVERRIDE;
     42     void preferencesChanged(float initialButtonDelay, float autoscrollButtonDelay, NSScrollerStyle preferredScrollerStyle, bool redraw);
     43 
     44     virtual bool supportsControlTints() const OVERRIDE { return true; }
     45 
     46     virtual double initialAutoscrollTimerDelay() OVERRIDE;
     47     virtual double autoscrollTimerDelay() OVERRIDE;
     48 
     49     virtual void paintOverhangBackground(GraphicsContext*, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect) OVERRIDE;
     50     virtual void paintOverhangShadows(GraphicsContext*, const IntSize& scrollOffset, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect) OVERRIDE;
     51     virtual void paintTickmarks(GraphicsContext*, ScrollbarThemeClient*, const IntRect&) OVERRIDE;
     52 
     53     static NSScrollerStyle recommendedScrollerStyle();
     54 
     55     static bool isOverlayAPIAvailable();
     56 
     57 protected:
     58     virtual int maxOverlapBetweenPages() OVERRIDE { return 40; }
     59 
     60     virtual bool shouldDragDocumentInsteadOfThumb(ScrollbarThemeClient*, const PlatformMouseEvent&) OVERRIDE;
     61     int scrollbarPartToHIPressedState(ScrollbarPart);
     62 
     63     virtual void updateButtonPlacement() { }
     64 
     65     void paintGivenTickmarks(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, const Vector<IntRect>&);
     66 
     67     RefPtr<Pattern> m_overhangPattern;
     68 };
     69 
     70 }
     71 
     72 #endif // ScrollbarThemeMacCommon_h
     73