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/*
* Copyright (C) 2012 Google 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 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 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 WebScrollbarThemePainter_h
#define WebScrollbarThemePainter_h
#include "public/platform/WebCanvas.h"
#include "public/platform/WebPrivatePtr.h"
namespace blink {
class ScrollbarTheme;
class Scrollbar;
class WebScrollbar;
struct WebRect;
class WebScrollbarThemePainter {
public:
WebScrollbarThemePainter() : m_theme(0), m_deviceScaleFactor(1.0) { }
WebScrollbarThemePainter(const WebScrollbarThemePainter& painter) { assign(painter); }
virtual ~WebScrollbarThemePainter()
{
reset();
}
WebScrollbarThemePainter& operator=(const WebScrollbarThemePainter& painter)
{
assign(painter);
return *this;
}
BLINK_PLATFORM_EXPORT void assign(const WebScrollbarThemePainter&);
BLINK_PLATFORM_EXPORT void reset();
BLINK_PLATFORM_EXPORT void paintScrollbarBackground(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintTrackBackground(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintBackTrackPart(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintForwardTrackPart(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintBackButtonStart(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintBackButtonEnd(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintForwardButtonStart(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintForwardButtonEnd(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintTickmarks(WebCanvas*, const WebRect&);
BLINK_PLATFORM_EXPORT void paintThumb(WebCanvas*, const WebRect&);
#if INSIDE_BLINK
BLINK_PLATFORM_EXPORT WebScrollbarThemePainter(ScrollbarTheme*, Scrollbar*, float deviceScaleFactor);
#endif
private:
// The theme is not owned by this class. It is assumed that the theme is a
// static pointer and its lifetime is essentially infinite. The functions
// called from the painter may not be thread-safe, so all calls must be made
// from the same thread that it is created on.
ScrollbarTheme* m_theme;
// It is assumed that the constructor of this paint object is responsible
// for the lifetime of this scrollbar. The painter has to use the real
// scrollbar (and not a WebScrollbar wrapper) due to static_casts for
// LayoutScrollbar and pointer-based HashMap lookups for Lion scrollbars.
WebPrivatePtr<Scrollbar> m_scrollbar;
float m_deviceScaleFactor;
};
} // namespace blink
#endif
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