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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "SymbolsIterator.h" | 5 #include "SymbolsIterator.h" |
| 6 | 6 |
| 7 #include "wtf/PtrUtil.h" | 7 #include "wtf/PtrUtil.h" |
| 8 #include <unicode/uchar.h> | 8 #include <unicode/uchar.h> |
| 9 #include <unicode/uniset.h> | 9 #include <unicode/uniset.h> |
| 10 | 10 |
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| 102 peekChar == combiningEnclosingCircleBackslashCharacter) { | 102 peekChar == combiningEnclosingCircleBackslashCharacter) { |
| 103 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; | 103 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; |
| 104 } | 104 } |
| 105 | 105 |
| 106 // Regional indicators | 106 // Regional indicators |
| 107 if (Character::isRegionalIndicator(m_nextChar) && | 107 if (Character::isRegionalIndicator(m_nextChar) && |
| 108 Character::isRegionalIndicator(peekChar)) { | 108 Character::isRegionalIndicator(peekChar)) { |
| 109 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; | 109 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; |
| 110 } | 110 } |
| 111 | 111 |
| 112 // Upgrade text presentation emoji to emoji presentation when followed by
ZWJ, | 112 // Upgrade text presentation emoji to emoji presentation when followed by |
| 113 // Example U+1F441 U+200D U+1F5E8, eye + ZWJ + left speech bubble. | 113 // ZWJ, Example U+1F441 U+200D U+1F5E8, eye + ZWJ + left speech bubble. |
| 114 if ((m_nextChar == eyeCharacter || | 114 if ((m_nextChar == eyeCharacter || |
| 115 m_nextChar == wavingWhiteFlagCharacter) && | 115 m_nextChar == wavingWhiteFlagCharacter) && |
| 116 peekChar == zeroWidthJoinerCharacter) { | 116 peekChar == zeroWidthJoinerCharacter) { |
| 117 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; | 117 m_currentFontFallbackPriority = FontFallbackPriority::EmojiEmoji; |
| 118 } | 118 } |
| 119 } | 119 } |
| 120 | 120 |
| 121 if (m_previousFontFallbackPriority != m_currentFontFallbackPriority && | 121 if (m_previousFontFallbackPriority != m_currentFontFallbackPriority && |
| 122 (m_previousFontFallbackPriority != FontFallbackPriority::Invalid)) { | 122 (m_previousFontFallbackPriority != FontFallbackPriority::Invalid)) { |
| 123 *symbolsLimit = iteratorOffset; | 123 *symbolsLimit = iteratorOffset; |
| 124 *fontFallbackPriority = m_previousFontFallbackPriority; | 124 *fontFallbackPriority = m_previousFontFallbackPriority; |
| 125 return true; | 125 return true; |
| 126 } | 126 } |
| 127 } | 127 } |
| 128 *symbolsLimit = m_bufferSize; | 128 *symbolsLimit = m_bufferSize; |
| 129 *fontFallbackPriority = m_currentFontFallbackPriority; | 129 *fontFallbackPriority = m_currentFontFallbackPriority; |
| 130 m_atEnd = true; | 130 m_atEnd = true; |
| 131 return true; | 131 return true; |
| 132 } | 132 } |
| 133 | 133 |
| 134 } // namespace blink | 134 } // namespace blink |
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