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