1 /* 2 * Copyright (C) 2003, 2009, 2012 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 COMPUTER, 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 ClipRects_h 27 #define ClipRects_h 28 29 #include "core/rendering/ClipRect.h" 30 31 namespace blink { 32 33 class ClipRects { 34 WTF_MAKE_FAST_ALLOCATED; 35 public: create()36 static PassRefPtr<ClipRects> create() 37 { 38 return adoptRef(new ClipRects); 39 } 40 create(const ClipRects & other)41 static PassRefPtr<ClipRects> create(const ClipRects& other) 42 { 43 return adoptRef(new ClipRects(other)); 44 } 45 ClipRects()46 ClipRects() 47 : m_refCnt(1) 48 , m_fixed(0) 49 { 50 } 51 reset(const LayoutRect & r)52 void reset(const LayoutRect& r) 53 { 54 m_overflowClipRect = r; 55 m_fixedClipRect = r; 56 m_posClipRect = r; 57 m_fixed = 0; 58 } 59 overflowClipRect()60 const ClipRect& overflowClipRect() const { return m_overflowClipRect; } setOverflowClipRect(const ClipRect & r)61 void setOverflowClipRect(const ClipRect& r) { m_overflowClipRect = r; } 62 fixedClipRect()63 const ClipRect& fixedClipRect() const { return m_fixedClipRect; } setFixedClipRect(const ClipRect & r)64 void setFixedClipRect(const ClipRect&r) { m_fixedClipRect = r; } 65 posClipRect()66 const ClipRect& posClipRect() const { return m_posClipRect; } setPosClipRect(const ClipRect & r)67 void setPosClipRect(const ClipRect& r) { m_posClipRect = r; } 68 fixed()69 bool fixed() const { return static_cast<bool>(m_fixed); } setFixed(bool fixed)70 void setFixed(bool fixed) { m_fixed = fixed ? 1 : 0; } 71 ref()72 void ref() { m_refCnt++; } deref()73 void deref() 74 { 75 if (!--m_refCnt) 76 delete this; 77 } 78 79 bool operator==(const ClipRects& other) const 80 { 81 return m_overflowClipRect == other.overflowClipRect() 82 && m_fixedClipRect == other.fixedClipRect() 83 && m_posClipRect == other.posClipRect() 84 && fixed() == other.fixed(); 85 } 86 87 ClipRects& operator=(const ClipRects& other) 88 { 89 m_overflowClipRect = other.overflowClipRect(); 90 m_fixedClipRect = other.fixedClipRect(); 91 m_posClipRect = other.posClipRect(); 92 m_fixed = other.fixed(); 93 return *this; 94 } 95 96 private: ClipRects(const LayoutRect & r)97 ClipRects(const LayoutRect& r) 98 : m_overflowClipRect(r) 99 , m_fixedClipRect(r) 100 , m_posClipRect(r) 101 , m_refCnt(1) 102 , m_fixed(0) 103 { 104 } 105 ClipRects(const ClipRects & other)106 ClipRects(const ClipRects& other) 107 : m_overflowClipRect(other.overflowClipRect()) 108 , m_fixedClipRect(other.fixedClipRect()) 109 , m_posClipRect(other.posClipRect()) 110 , m_refCnt(1) 111 , m_fixed(other.fixed()) 112 { 113 } 114 115 ClipRect m_overflowClipRect; 116 ClipRect m_fixedClipRect; 117 ClipRect m_posClipRect; 118 unsigned m_refCnt : 31; 119 unsigned m_fixed : 1; 120 }; 121 122 } // namespace blink 123 124 #endif // ClipRects_h 125