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      1 /*
      2  * Copyright (C) 2012 Google 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  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef ScrollbarThemeClient_h
     27 #define ScrollbarThemeClient_h
     28 
     29 #include "core/platform/ScrollTypes.h"
     30 #include "core/platform/graphics/IntPoint.h"
     31 #include "core/platform/graphics/IntRect.h"
     32 #include "core/platform/graphics/IntSize.h"
     33 #include "wtf/PassOwnPtr.h"
     34 #include "wtf/Vector.h"
     35 
     36 namespace WebCore {
     37 
     38 class ScrollView;
     39 
     40 class ScrollbarThemeClient {
     41 public:
     42     virtual int x() const = 0;
     43     virtual int y() const = 0;
     44     virtual int width() const = 0;
     45     virtual int height() const = 0;
     46     virtual IntSize size() const = 0;
     47     virtual IntPoint location() const = 0;
     48 
     49     virtual ScrollView* parent() const = 0;
     50     virtual ScrollView* root() const = 0;
     51 
     52     virtual void setFrameRect(const IntRect&) = 0;
     53     virtual IntRect frameRect() const = 0;
     54 
     55     virtual void invalidate() = 0;
     56     virtual void invalidateRect(const IntRect&) = 0;
     57 
     58     virtual ScrollbarOverlayStyle scrollbarOverlayStyle() const = 0;
     59     virtual void getTickmarks(Vector<IntRect>&) const = 0;
     60     virtual bool isScrollableAreaActive() const = 0;
     61     virtual bool isScrollViewScrollbar() const = 0;
     62 
     63     virtual IntPoint convertFromContainingWindow(const IntPoint& windowPoint) = 0;
     64 
     65     virtual bool isCustomScrollbar() const = 0;
     66     virtual ScrollbarOrientation orientation() const = 0;
     67 
     68     virtual int value() const = 0;
     69     virtual float currentPos() const = 0;
     70     virtual int visibleSize() const = 0;
     71     virtual int totalSize() const = 0;
     72     virtual int maximum() const = 0;
     73     virtual ScrollbarControlSize controlSize() const = 0;
     74 
     75     virtual ScrollbarPart pressedPart() const = 0;
     76     virtual ScrollbarPart hoveredPart() const = 0;
     77 
     78     virtual void styleChanged() = 0;
     79 
     80     virtual bool enabled() const = 0;
     81     virtual void setEnabled(bool) = 0;
     82 
     83     virtual bool isOverlayScrollbar() const = 0;
     84 
     85     virtual bool isAlphaLocked() const = 0;
     86     virtual void setIsAlphaLocked(bool) = 0;
     87 
     88 protected:
     89     virtual ~ScrollbarThemeClient() { }
     90 };
     91 
     92 } // namespace WebCore
     93 
     94 #endif // ScollbarThemeClient_h
     95