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 WebScrollbarThemePainter_h 27 #define WebScrollbarThemePainter_h 28 29 #include "WebCanvas.h" 30 31 namespace blink { 32 33 class ScrollbarTheme; 34 class Scrollbar; 35 class WebScrollbar; 36 struct WebRect; 37 38 class WebScrollbarThemePainter { 39 public: WebScrollbarThemePainter()40 WebScrollbarThemePainter() : m_theme(0) { } WebScrollbarThemePainter(const WebScrollbarThemePainter & painter)41 WebScrollbarThemePainter(const WebScrollbarThemePainter& painter) { assign(painter); } ~WebScrollbarThemePainter()42 virtual ~WebScrollbarThemePainter() { } 43 WebScrollbarThemePainter& operator=(const WebScrollbarThemePainter& painter) 44 { 45 assign(painter); 46 return *this; 47 } 48 49 BLINK_EXPORT void assign(const WebScrollbarThemePainter&); 50 51 BLINK_EXPORT void paintScrollbarBackground(WebCanvas*, const WebRect&); 52 BLINK_EXPORT void paintTrackBackground(WebCanvas*, const WebRect&); 53 BLINK_EXPORT void paintBackTrackPart(WebCanvas*, const WebRect&); 54 BLINK_EXPORT void paintForwardTrackPart(WebCanvas*, const WebRect&); 55 BLINK_EXPORT void paintBackButtonStart(WebCanvas*, const WebRect&); 56 BLINK_EXPORT void paintBackButtonEnd(WebCanvas*, const WebRect&); 57 BLINK_EXPORT void paintForwardButtonStart(WebCanvas*, const WebRect&); 58 BLINK_EXPORT void paintForwardButtonEnd(WebCanvas*, const WebRect&); 59 BLINK_EXPORT void paintTickmarks(WebCanvas*, const WebRect&); 60 BLINK_EXPORT void paintThumb(WebCanvas*, const WebRect&); 61 62 #if BLINK_IMPLEMENTATION 63 WebScrollbarThemePainter(ScrollbarTheme*, Scrollbar*); 64 #endif 65 66 private: 67 // The theme is not owned by this class. It is assumed that the theme is a 68 // static pointer and its lifetime is essentially infinite. The functions 69 // called from the painter may not be thread-safe, so all calls must be made 70 // from the same thread that it is created on. 71 ScrollbarTheme* m_theme; 72 73 // It is assumed that the constructor of this paint object is responsible 74 // for the lifetime of this scrollbar. The painter has to use the real 75 // scrollbar (and not a WebScrollbar wrapper) due to static_casts for 76 // RenderScrollbar and pointer-based HashMap lookups for Lion scrollbars. 77 Scrollbar* m_scrollbar; 78 }; 79 80 } // namespace blink 81 82 #endif 83