1 /* 2 * Copyright (c) 2009, 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef FontFaceCreationParams_h 32 #define FontFaceCreationParams_h 33 34 #include "wtf/Assertions.h" 35 #include "wtf/StringHasher.h" 36 #include "wtf/text/AtomicString.h" 37 #include "wtf/text/StringHash.h" 38 39 namespace blink { 40 41 enum FontFaceCreationType { 42 CreateFontByFamily, 43 CreateFontByFciIdAndTtcIndex 44 }; 45 46 class FontFaceCreationParams { 47 FontFaceCreationType m_creationType; 48 AtomicString m_family; 49 CString m_filename; 50 int m_fontconfigInterfaceId; 51 int m_ttcIndex; 52 53 public: 54 FontFaceCreationParams() 55 : m_creationType(CreateFontByFamily), m_family(AtomicString()), m_filename(CString()), m_fontconfigInterfaceId(0), m_ttcIndex(0) 56 { 57 } 58 59 explicit FontFaceCreationParams(AtomicString family) 60 : m_creationType(CreateFontByFamily), m_family(family), m_filename(CString()), m_fontconfigInterfaceId(0), m_ttcIndex(0) 61 { 62 #if OS(WIN) && ENABLE(OPENTYPE_VERTICAL) 63 // Leading "@" in the font name enables Windows vertical flow flag for the font. 64 // Because we do vertical flow by ourselves, we don't want to use the Windows feature. 65 // IE disregards "@" regardless of the orientation, so we follow the behavior and 66 // normalize the family name. 67 m_family = (m_family.isEmpty() || m_family[0] != '@') ? m_family : AtomicString(m_family.impl()->substring(1)); 68 #endif 69 } 70 71 FontFaceCreationParams(CString filename, int fontconfigInterfaceId, int ttcIndex = 0) 72 : m_creationType(CreateFontByFciIdAndTtcIndex), m_filename(filename), m_fontconfigInterfaceId(fontconfigInterfaceId), m_ttcIndex(ttcIndex) 73 { 74 } 75 76 FontFaceCreationType creationType() const { return m_creationType; } 77 AtomicString family() const 78 { 79 ASSERT(m_creationType == CreateFontByFamily); 80 return m_family; 81 } 82 CString filename() const 83 { 84 ASSERT(m_creationType == CreateFontByFciIdAndTtcIndex); 85 return m_filename; 86 } 87 int fontconfigInterfaceId() const 88 { 89 ASSERT(m_creationType == CreateFontByFciIdAndTtcIndex); 90 return m_fontconfigInterfaceId; 91 } 92 int ttcIndex() const 93 { 94 ASSERT(m_creationType == CreateFontByFciIdAndTtcIndex); 95 return m_ttcIndex; 96 } 97 98 unsigned hash() const 99 { 100 if (m_creationType == CreateFontByFciIdAndTtcIndex) { 101 StringHasher hasher; 102 // Hashing the filename and ints in this way is sensitive to character encoding 103 // and endianness. However, since the hash is not transferred over a network 104 // or permanently stored and only used for the runtime of Chromium, 105 // this is not a concern. 106 hasher.addCharacters(reinterpret_cast<const LChar*>(m_filename.data()), m_filename.length()); 107 hasher.addCharacters(reinterpret_cast<const LChar*>(&m_ttcIndex), sizeof(m_ttcIndex)); 108 hasher.addCharacters(reinterpret_cast<const LChar*>(&m_fontconfigInterfaceId), sizeof(m_fontconfigInterfaceId)); 109 return hasher.hash(); 110 } 111 return CaseFoldingHash::hash(m_family.isEmpty() ? "" : m_family); 112 } 113 114 bool operator==(const FontFaceCreationParams& other) const 115 { 116 return m_creationType == other.m_creationType 117 && equalIgnoringCase(m_family, other.m_family) 118 && m_filename == other.m_filename 119 && m_fontconfigInterfaceId == other.m_fontconfigInterfaceId 120 && m_ttcIndex == other.m_ttcIndex; 121 } 122 123 }; 124 125 } // namespace blink 126 127 #endif // FontFaceCreationParams_h 128