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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 "gin/wrappable.h" | 5 #include "gin/wrappable.h" |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "gin/per_isolate_data.h" | 8 #include "gin/per_isolate_data.h" |
9 | 9 |
10 namespace gin { | 10 namespace gin { |
11 | 11 |
12 Wrappable::Wrappable() { | 12 Wrappable::Wrappable() { |
13 } | 13 } |
14 | 14 |
15 Wrappable::~Wrappable() { | 15 Wrappable::~Wrappable() { |
16 wrapper_.Reset(); | 16 wrapper_.Reset(); |
17 } | 17 } |
18 | 18 |
19 v8::Handle<v8::Object> Wrappable::GetWrapper(v8::Isolate* isolate) { | 19 v8::Handle<v8::Object> Wrappable::GetWrapper(v8::Isolate* isolate) { |
20 v8::Handle<v8::Value> wrapper = ConvertToV8(isolate, this); | 20 if (wrapper_.IsEmpty()) |
21 DCHECK(wrapper->IsObject()); | 21 CreateWrapper(isolate); |
22 return v8::Handle<v8::Object>::Cast(wrapper); | 22 return v8::Local<v8::Object>::New(isolate, wrapper_); |
23 } | 23 } |
24 | 24 |
25 void Wrappable::WeakCallback( | 25 void Wrappable::WeakCallback( |
26 const v8::WeakCallbackData<v8::Object, Wrappable>& data) { | 26 const v8::WeakCallbackData<v8::Object, Wrappable>& data) { |
27 Wrappable* wrappable = data.GetParameter(); | 27 Wrappable* wrappable = data.GetParameter(); |
28 wrappable->wrapper_.Reset(); | 28 wrappable->wrapper_.Reset(); |
29 delete wrappable; | 29 delete wrappable; |
30 } | 30 } |
31 | 31 |
32 v8::Handle<v8::Object> Wrappable::CreateWrapper(v8::Isolate* isolate) { | 32 v8::Handle<v8::Object> Wrappable::CreateWrapper(v8::Isolate* isolate) { |
33 WrapperInfo* info = GetWrapperInfo(); | 33 WrapperInfo* info = GetWrapperInfo(); |
34 PerIsolateData* data = PerIsolateData::From(isolate); | 34 PerIsolateData* data = PerIsolateData::From(isolate); |
35 v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(info); | 35 v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(info); |
36 CHECK(!templ.IsEmpty()); // Don't forget to register an object template. | 36 CHECK(!templ.IsEmpty()); // Don't forget to register an object template. |
37 CHECK_EQ(kNumberOfInternalFields, templ->InternalFieldCount()); | 37 CHECK_EQ(kNumberOfInternalFields, templ->InternalFieldCount()); |
38 v8::Handle<v8::Object> wrapper = templ->NewInstance(); | 38 v8::Handle<v8::Object> wrapper = templ->NewInstance(); |
39 wrapper->SetAlignedPointerInInternalField(kWrapperInfoIndex, info); | 39 wrapper->SetAlignedPointerInInternalField(kWrapperInfoIndex, info); |
40 wrapper->SetAlignedPointerInInternalField(kEncodedValueIndex, this); | 40 wrapper->SetAlignedPointerInInternalField(kEncodedValueIndex, this); |
41 wrapper_.Reset(isolate, wrapper); | 41 wrapper_.Reset(isolate, wrapper); |
42 wrapper_.SetWeak(this, WeakCallback); | 42 wrapper_.SetWeak(this, WeakCallback); |
43 return wrapper; | 43 return wrapper; |
44 } | 44 } |
45 | 45 |
46 v8::Handle<v8::Value> Converter<Wrappable*>::ToV8(v8::Isolate* isolate, | |
47 Wrappable* val) { | |
48 if (val->wrapper_.IsEmpty()) | |
49 return val->CreateWrapper(isolate); | |
50 return v8::Local<v8::Object>::New(isolate, val->wrapper_); | |
51 } | |
52 | |
53 bool Converter<Wrappable*>::FromV8(v8::Isolate* isolate, | |
54 v8::Handle<v8::Value> val, Wrappable** out) { | |
55 if (!val->IsObject()) | |
56 return false; | |
57 v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(val); | |
58 WrapperInfo* info = WrapperInfo::From(obj); | |
59 if (!info) | |
60 return false; | |
61 void* pointer = obj->GetAlignedPointerFromInternalField(kEncodedValueIndex); | |
62 Wrappable* wrappable = static_cast<Wrappable*>(pointer); | |
63 CHECK(wrappable->GetWrapperInfo() == info); // Security check for cast above. | |
64 *out = wrappable; | |
65 return true; | |
66 } | |
67 | |
68 } // namespace gin | 46 } // namespace gin |
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