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Side by Side Diff: third_party/WebKit/Source/platform/fonts/shaping/ShapeCache.h

Issue 2614883007: Change computed style enums to be prefixed with 'k'. (Closed)
Patch Set: Rebase on ToT. Created 3 years, 11 months ago
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1 /* 1 /*
2 * Copyright (C) 2012 Apple Inc. All rights reserved. 2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 * Copyright (C) 2015 Google Inc. All rights reserved. 3 * Copyright (C) 2015 Google Inc. All rights reserved.
4 * 4 *
5 * Redistribution and use in source and binary forms, with or without 5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions 6 * modification, are permitted provided that the following conditions
7 * are met: 7 * are met:
8 * 1. Redistributions of source code must retain the above copyright 8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright 10 * 2. Redistributions in binary form must reproduce the above copyright
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52 // Used to optimize small strings as hash table keys. Avoids malloc'ing an 52 // Used to optimize small strings as hash table keys. Avoids malloc'ing an
53 // out-of-line StringImpl. 53 // out-of-line StringImpl.
54 class SmallStringKey { 54 class SmallStringKey {
55 DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); 55 DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
56 56
57 public: 57 public:
58 static unsigned capacity() { return s_capacity; } 58 static unsigned capacity() { return s_capacity; }
59 59
60 SmallStringKey() 60 SmallStringKey()
61 : m_length(s_emptyValueLength), 61 : m_length(s_emptyValueLength),
62 m_direction(static_cast<unsigned>(TextDirection::Ltr)) {} 62 m_direction(static_cast<unsigned>(TextDirection::kLtr)) {}
63 63
64 SmallStringKey(WTF::HashTableDeletedValueType) 64 SmallStringKey(WTF::HashTableDeletedValueType)
65 : m_length(s_deletedValueLength), 65 : m_length(s_deletedValueLength),
66 m_direction(static_cast<unsigned>(TextDirection::Ltr)) {} 66 m_direction(static_cast<unsigned>(TextDirection::kLtr)) {}
67 67
68 template <typename CharacterType> 68 template <typename CharacterType>
69 SmallStringKey(CharacterType* characters, 69 SmallStringKey(CharacterType* characters,
70 unsigned short length, 70 unsigned short length,
71 TextDirection direction) 71 TextDirection direction)
72 : m_length(length), m_direction(static_cast<unsigned>(direction)) { 72 : m_length(length), m_direction(static_cast<unsigned>(direction)) {
73 ASSERT(length <= s_capacity); 73 ASSERT(length <= s_capacity);
74 74
75 StringHasher hasher; 75 StringHasher hasher;
76 76
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181 181
182 private: 182 private:
183 ShapeCacheEntry* addSlowCase(const TextRun& run, ShapeCacheEntry entry) { 183 ShapeCacheEntry* addSlowCase(const TextRun& run, ShapeCacheEntry entry) {
184 unsigned length = run.length(); 184 unsigned length = run.length();
185 bool isNewEntry; 185 bool isNewEntry;
186 ShapeCacheEntry* value; 186 ShapeCacheEntry* value;
187 if (length == 1) { 187 if (length == 1) {
188 uint32_t key = run[0]; 188 uint32_t key = run[0];
189 // All current codepointsin UTF-32 are bewteen 0x0 and 0x10FFFF, 189 // All current codepointsin UTF-32 are bewteen 0x0 and 0x10FFFF,
190 // as such use bit 32 to indicate direction. 190 // as such use bit 32 to indicate direction.
191 if (run.direction() == TextDirection::Rtl) 191 if (run.direction() == TextDirection::kRtl)
192 key |= (1u << 31); 192 key |= (1u << 31);
193 SingleCharMap::AddResult addResult = m_singleCharMap.add(key, entry); 193 SingleCharMap::AddResult addResult = m_singleCharMap.add(key, entry);
194 isNewEntry = addResult.isNewEntry; 194 isNewEntry = addResult.isNewEntry;
195 value = &addResult.storedValue->value; 195 value = &addResult.storedValue->value;
196 } else { 196 } else {
197 SmallStringKey smallStringKey; 197 SmallStringKey smallStringKey;
198 if (run.is8Bit()) 198 if (run.is8Bit())
199 smallStringKey = 199 smallStringKey =
200 SmallStringKey(run.characters8(), length, run.direction()); 200 SmallStringKey(run.characters8(), length, run.direction());
201 else 201 else
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250 inline bool operator==(const ShapeCache::SmallStringKey& a, 250 inline bool operator==(const ShapeCache::SmallStringKey& a,
251 const ShapeCache::SmallStringKey& b) { 251 const ShapeCache::SmallStringKey& b) {
252 if (a.length() != b.length() || a.direction() != b.direction()) 252 if (a.length() != b.length() || a.direction() != b.direction())
253 return false; 253 return false;
254 return WTF::equal(a.characters(), b.characters(), a.length()); 254 return WTF::equal(a.characters(), b.characters(), a.length());
255 } 255 }
256 256
257 } // namespace blink 257 } // namespace blink
258 258
259 #endif // ShapeCache_h 259 #endif // ShapeCache_h
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