1/* 2 * Copyright (C) 2003, 2006, 2008 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 COMPUTER, 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 FontFamily_h 27#define FontFamily_h 28 29#include "platform/PlatformExport.h" 30#include "wtf/RefCounted.h" 31#include "wtf/RefPtr.h" 32#include "wtf/text/AtomicString.h" 33 34namespace blink { 35 36class SharedFontFamily; 37 38class PLATFORM_EXPORT FontFamily { 39public: 40 FontFamily() { } 41 ~FontFamily(); 42 43 void setFamily(const AtomicString& family) { m_family = family; } 44 const AtomicString& family() const { return m_family; } 45 bool familyIsEmpty() const { return m_family.isEmpty(); } 46 47 const FontFamily* next() const; 48 49 void appendFamily(PassRefPtr<SharedFontFamily>); 50 PassRefPtr<SharedFontFamily> releaseNext(); 51 52private: 53 AtomicString m_family; 54 RefPtr<SharedFontFamily> m_next; 55}; 56 57class PLATFORM_EXPORT SharedFontFamily : public FontFamily, public RefCounted<SharedFontFamily> { 58public: 59 static PassRefPtr<SharedFontFamily> create() 60 { 61 return adoptRef(new SharedFontFamily); 62 } 63 64private: 65 SharedFontFamily() { } 66}; 67 68PLATFORM_EXPORT bool operator==(const FontFamily&, const FontFamily&); 69inline bool operator!=(const FontFamily& a, const FontFamily& b) { return !(a == b); } 70 71inline FontFamily::~FontFamily() 72{ 73 RefPtr<SharedFontFamily> reaper = m_next.release(); 74 while (reaper && reaper->hasOneRef()) 75 reaper = reaper->releaseNext(); // implicitly protects reaper->next, then derefs reaper 76} 77 78inline const FontFamily* FontFamily::next() const 79{ 80 return m_next.get(); 81} 82 83inline void FontFamily::appendFamily(PassRefPtr<SharedFontFamily> family) 84{ 85 m_next = family; 86} 87 88inline PassRefPtr<SharedFontFamily> FontFamily::releaseNext() 89{ 90 return m_next.release(); 91} 92 93} // namespace blink 94 95#endif 96