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| 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 | |
| 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 INC. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "bindings/v8/V8ValueCache.h" | |
| 28 | |
| 29 #include "bindings/v8/V8Binding.h" | |
| 30 #include "wtf/text/StringHash.h" | |
| 31 | |
| 32 namespace WebCore { | |
| 33 | |
| 34 StringCacheMapTraits::MapType* StringCacheMapTraits::MapFromWeakCallbackData( | |
| 35 const v8::WeakCallbackData<v8::String, WeakCallbackDataType>& data) | |
| 36 { | |
| 37 return &(V8PerIsolateData::from(data.GetIsolate())->stringCache()->m_stringC
ache); | |
| 38 } | |
| 39 | |
| 40 | |
| 41 void StringCacheMapTraits::Dispose( | |
| 42 v8::Isolate* isolate, v8::UniquePersistent<v8::String> value, StringImpl* ke
y) | |
| 43 { | |
| 44 V8PerIsolateData::from(isolate)->stringCache()->InvalidateLastString(); | |
| 45 key->deref(); | |
| 46 } | |
| 47 | |
| 48 | |
| 49 StringCache::~StringCache() | |
| 50 { | |
| 51 // The MapType::Dispose callback calls StringCache::InvalidateLastString, | |
| 52 // which will only work while the destructor has not yet finished. Thus, | |
| 53 // we need to clear the map before the destructor has completed. | |
| 54 m_stringCache.Clear(); | |
| 55 } | |
| 56 | |
| 57 static v8::Local<v8::String> makeExternalString(const String& string, v8::Isolat
e* isolate) | |
| 58 { | |
| 59 if (string.is8Bit()) { | |
| 60 WebCoreStringResource8* stringResource = new WebCoreStringResource8(stri
ng); | |
| 61 v8::Local<v8::String> newString = v8::String::NewExternal(isolate, strin
gResource); | |
| 62 if (newString.IsEmpty()) | |
| 63 delete stringResource; | |
| 64 return newString; | |
| 65 } | |
| 66 | |
| 67 WebCoreStringResource16* stringResource = new WebCoreStringResource16(string
); | |
| 68 v8::Local<v8::String> newString = v8::String::NewExternal(isolate, stringRes
ource); | |
| 69 if (newString.IsEmpty()) | |
| 70 delete stringResource; | |
| 71 return newString; | |
| 72 } | |
| 73 | |
| 74 v8::Handle<v8::String> StringCache::v8ExternalStringSlow(StringImpl* stringImpl,
v8::Isolate* isolate) | |
| 75 { | |
| 76 if (!stringImpl->length()) | |
| 77 return v8::String::Empty(isolate); | |
| 78 | |
| 79 StringCacheMapTraits::MapType::PersistentValueReference cachedV8String = m_s
tringCache.GetReference(stringImpl); | |
| 80 if (!cachedV8String.IsEmpty()) { | |
| 81 m_lastStringImpl = stringImpl; | |
| 82 m_lastV8String = cachedV8String; | |
| 83 return m_lastV8String.NewLocal(isolate); | |
| 84 } | |
| 85 | |
| 86 return createStringAndInsertIntoCache(stringImpl, isolate); | |
| 87 } | |
| 88 | |
| 89 void StringCache::setReturnValueFromStringSlow(v8::ReturnValue<v8::Value> return
Value, StringImpl* stringImpl) | |
| 90 { | |
| 91 if (!stringImpl->length()) { | |
| 92 returnValue.SetEmptyString(); | |
| 93 return; | |
| 94 } | |
| 95 | |
| 96 StringCacheMapTraits::MapType::PersistentValueReference cachedV8String = m_s
tringCache.GetReference(stringImpl); | |
| 97 if (!cachedV8String.IsEmpty()) { | |
| 98 m_lastStringImpl = stringImpl; | |
| 99 m_lastV8String = cachedV8String; | |
| 100 m_lastV8String.SetReturnValue(returnValue); | |
| 101 return; | |
| 102 } | |
| 103 | |
| 104 returnValue.Set(createStringAndInsertIntoCache(stringImpl, returnValue.GetIs
olate())); | |
| 105 } | |
| 106 | |
| 107 v8::Local<v8::String> StringCache::createStringAndInsertIntoCache(StringImpl* st
ringImpl, v8::Isolate* isolate) | |
| 108 { | |
| 109 ASSERT(!m_stringCache.Contains(stringImpl)); | |
| 110 ASSERT(stringImpl->length()); | |
| 111 | |
| 112 v8::Local<v8::String> newString = makeExternalString(String(stringImpl), iso
late); | |
| 113 if (newString.IsEmpty()) | |
| 114 return newString; | |
| 115 | |
| 116 v8::UniquePersistent<v8::String> wrapper(isolate, newString); | |
| 117 | |
| 118 stringImpl->ref(); | |
| 119 wrapper.MarkIndependent(); | |
| 120 m_stringCache.Set(stringImpl, wrapper.Pass(), &m_lastV8String); | |
| 121 m_lastStringImpl = stringImpl; | |
| 122 | |
| 123 return newString; | |
| 124 } | |
| 125 | |
| 126 void StringCache::InvalidateLastString() | |
| 127 { | |
| 128 m_lastStringImpl = nullptr; | |
| 129 m_lastV8String.Reset(); | |
| 130 } | |
| 131 | |
| 132 } // namespace WebCore | |
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Chromium Code Reviews
Issue 351423002:
Moved files under Source/bindings/v8 to Source/bindings/core/v8. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk