| /* |
| * 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" |
| #include "public/platform/WebRect.h" |
| #include "public/platform/WebSize.h" |
| |
| namespace blink { |
| |
| class ScrollbarTheme; |
| class Scrollbar; |
| class WebScrollbar; |
| |
| class WebScrollbarThemePainter { |
| public: |
| WebScrollbarThemePainter() : theme_(0), device_scale_factor_(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&); |
| |
| // This opacity is applied on top of the content that is painted for the |
| // thumb. |
| BLINK_PLATFORM_EXPORT float ThumbOpacity() const; |
| |
| BLINK_PLATFORM_EXPORT bool TrackNeedsRepaint() const; |
| BLINK_PLATFORM_EXPORT bool ThumbNeedsRepaint() const; |
| |
| BLINK_PLATFORM_EXPORT bool UsesNinePatchThumbResource() const; |
| |
| #if INSIDE_BLINK |
| BLINK_PLATFORM_EXPORT WebScrollbarThemePainter(ScrollbarTheme&, |
| Scrollbar&, |
| float device_scale_factor); |
| #endif |
| |
| BLINK_PLATFORM_EXPORT float DeviceScaleFactor() const { |
| return device_scale_factor_; |
| } |
| |
| 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* 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> scrollbar_; |
| |
| float device_scale_factor_; |
| }; |
| |
| } // namespace blink |
| |
| #endif |