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| 1 /* | |
| 2 * Copyright (C) 2012 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 V8AdaptorFunction_h | |
| 32 #define V8AdaptorFunction_h | |
| 33 | |
| 34 #include "bindings/v8/V8Binding.h" | |
| 35 #include "bindings/v8/V8HiddenPropertyName.h" | |
| 36 #include "bindings/v8/WrapperTypeInfo.h" | |
| 37 #include "wtf/PassRefPtr.h" | |
| 38 | |
| 39 namespace WebCore { | |
| 40 | |
| 41 // | |
| 42 // FIXME(https://bugs.webkit.org/show_bug.cgi?id=108138): | |
| 43 // V8AdaptorFunction class and V8WrapAsFunction IDL attribute are needed for two
reasons: | |
| 44 // - 1) V8 doesn't allow expanding the internal field of function objects. https
://code.google.com/p/v8/issues/detail?id=837 | |
| 45 // WebKit need it to associate each wrapper to its backing C++ object. We s
tore it in a hidden property of the wrapped object. | |
| 46 // - 2) Binding codebase assumes every wrapper object is created through ObjectT
emplate::NewInstance(), not FunctionTemplate::GetFunction(). | |
| 47 // Once 1) is addresssed, we could attack 2) with it. | |
| 48 // | |
| 49 class V8AdaptorFunction { | |
| 50 public: | |
| 51 static WrapperTypeInfo info; | |
| 52 static v8::Handle<v8::Object> unwrap(v8::Handle<v8::Function>); | |
| 53 static v8::Handle<v8::Function> wrap(v8::Handle<v8::Object>, const AtomicStr
ing& name, v8::Isolate*); | |
| 54 static v8::Handle<v8::Function> get(v8::Handle<v8::Object>); | |
| 55 | |
| 56 static v8::Handle<v8::FunctionTemplate> getTemplate(v8::Isolate*, WrapperWor
ldType); | |
| 57 static v8::Handle<v8::FunctionTemplate> configureTemplate(v8::Handle<v8::Fun
ctionTemplate>); | |
| 58 static void invocationCallback(const v8::FunctionCallbackInfo<v8::Value>&); | |
| 59 }; | |
| 60 | |
| 61 inline v8::Handle<v8::Object> V8AdaptorFunction::unwrap(v8::Handle<v8::Function>
function) | |
| 62 { | |
| 63 v8::Handle<v8::Value> wrapped = function->GetHiddenValue(V8HiddenPropertyNam
e::adaptorFunctionPeer()); | |
| 64 ASSERT(!wrapped.IsEmpty()); | |
| 65 ASSERT(wrapped->IsObject()); | |
| 66 return v8::Handle<v8::Object>::Cast(wrapped); | |
| 67 } | |
| 68 | |
| 69 inline v8::Handle<v8::Function> V8AdaptorFunction::get(v8::Handle<v8::Object> ob
ject) | |
| 70 { | |
| 71 v8::Handle<v8::Value> adaptorFunction = object->GetHiddenValue(V8HiddenPrope
rtyName::adaptorFunctionPeer()); | |
| 72 ASSERT(!adaptorFunction.IsEmpty()); | |
| 73 ASSERT(adaptorFunction->IsFunction()); | |
| 74 return v8::Handle<v8::Function>::Cast(adaptorFunction); | |
| 75 } | |
| 76 | |
| 77 } // namespace WebCore | |
| 78 | |
| 79 #endif // V8AdaptorFunction_h | |
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