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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 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 V8EventListenerList_h | |
| 32 #define V8EventListenerList_h | |
| 33 | |
| 34 #include "bindings/v8/V8Binding.h" | |
| 35 #include "bindings/v8/V8EventListener.h" | |
| 36 #include <v8.h> | |
| 37 | |
| 38 namespace WebCore { | |
| 39 | |
| 40 class LocalFrame; | |
| 41 | |
| 42 enum ListenerLookupType { | |
| 43 ListenerFindOnly, | |
| 44 ListenerFindOrCreate, | |
| 45 }; | |
| 46 | |
| 47 // This is a container for V8EventListener objects that uses hidden properties o
f v8::Object to speed up lookups. | |
| 48 class V8EventListenerList { | |
| 49 public: | |
| 50 static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, S
criptState* scriptState) | |
| 51 { | |
| 52 ASSERT(scriptState->isolate()->InContext()); | |
| 53 if (!value->IsObject()) | |
| 54 return nullptr; | |
| 55 | |
| 56 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(false, script
State->isolate()); | |
| 57 return doFindWrapper(v8::Local<v8::Object>::Cast(value), wrapperProperty
, scriptState); | |
| 58 } | |
| 59 | |
| 60 template<typename WrapperType> | |
| 61 static PassRefPtr<V8EventListener> findOrCreateWrapper(v8::Local<v8::Value>,
bool isAttribute, ScriptState*); | |
| 62 | |
| 63 static void clearWrapper(v8::Handle<v8::Object> listenerObject, bool isAttri
bute, v8::Isolate* isolate) | |
| 64 { | |
| 65 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute,
isolate); | |
| 66 listenerObject->DeleteHiddenValue(wrapperProperty); | |
| 67 } | |
| 68 | |
| 69 static PassRefPtr<EventListener> getEventListener(ScriptState*, v8::Local<v8
::Value>, bool isAttribute, ListenerLookupType); | |
| 70 | |
| 71 private: | |
| 72 static V8EventListener* doFindWrapper(v8::Local<v8::Object> object, v8::Hand
le<v8::String> wrapperProperty, ScriptState* scriptState) | |
| 73 { | |
| 74 v8::HandleScope scope(scriptState->isolate()); | |
| 75 ASSERT(scriptState->isolate()->InContext()); | |
| 76 v8::Local<v8::Value> listener = object->GetHiddenValue(wrapperProperty); | |
| 77 if (listener.IsEmpty()) | |
| 78 return 0; | |
| 79 return static_cast<V8EventListener*>(v8::External::Cast(*listener)->Valu
e()); | |
| 80 } | |
| 81 | |
| 82 static inline v8::Handle<v8::String> getHiddenProperty(bool isAttribute, v8:
:Isolate* isolate) | |
| 83 { | |
| 84 return isAttribute ? v8AtomicString(isolate, "attributeListener") : v8At
omicString(isolate, "listener"); | |
| 85 } | |
| 86 }; | |
| 87 | |
| 88 template<typename WrapperType> | |
| 89 PassRefPtr<V8EventListener> V8EventListenerList::findOrCreateWrapper(v8::Local<v
8::Value> value, bool isAttribute, ScriptState* scriptState) | |
| 90 { | |
| 91 v8::Isolate* isolate = scriptState->isolate(); | |
| 92 ASSERT(isolate->InContext()); | |
| 93 if (!value->IsObject() | |
| 94 // Non-callable attribute setter input is treated as null (no wrapper) | |
| 95 || (isAttribute && !value->IsFunction())) | |
| 96 return nullptr; | |
| 97 | |
| 98 v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value); | |
| 99 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute, isol
ate); | |
| 100 | |
| 101 V8EventListener* wrapper = doFindWrapper(object, wrapperProperty, scriptStat
e); | |
| 102 if (wrapper) | |
| 103 return wrapper; | |
| 104 | |
| 105 RefPtr<V8EventListener> wrapperPtr = WrapperType::create(object, isAttribute
, scriptState); | |
| 106 if (wrapperPtr) | |
| 107 object->SetHiddenValue(wrapperProperty, v8::External::New(isolate, wrapp
erPtr.get())); | |
| 108 | |
| 109 return wrapperPtr; | |
| 110 } | |
| 111 | |
| 112 } // namespace WebCore | |
| 113 | |
| 114 #endif // V8EventListenerList_h | |
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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