98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE.chromium file.
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#include "native_mate/wrappable.h"
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#include "base/logging.h"
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#include "native_mate/dictionary.h"
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#include "native_mate/object_template_builder.h"
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namespace mate {
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Wrappable::Wrappable() : isolate_(NULL) {
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}
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Wrappable::~Wrappable() {
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wrapper_.Reset();
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}
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void Wrappable::Wrap(v8::Isolate* isolate, v8::Local<v8::Object> wrapper) {
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if (!wrapper_.IsEmpty())
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return;
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isolate_ = isolate;
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wrapper->SetAlignedPointerInInternalField(0, this);
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wrapper_.Reset(isolate, wrapper);
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wrapper_.SetWeak(this, FirstWeakCallback, v8::WeakCallbackType::kParameter);
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// Call object._init if we have one.
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v8::Local<v8::Function> init;
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if (Dictionary(isolate, wrapper).Get("_init", &init))
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init->Call(wrapper, 0, nullptr);
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AfterInit(isolate);
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}
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// static
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void Wrappable::BuildPrototype(v8::Isolate* isolate,
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v8::Local<v8::ObjectTemplate> prototype) {
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}
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ObjectTemplateBuilder Wrappable::GetObjectTemplateBuilder(
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v8::Isolate* isolate) {
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return ObjectTemplateBuilder(isolate);
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}
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void Wrappable::FirstWeakCallback(const v8::WeakCallbackInfo<Wrappable>& data) {
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Wrappable* wrappable = data.GetParameter();
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wrappable->wrapper_.Reset();
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data.SetSecondPassCallback(SecondWeakCallback);
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}
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void Wrappable::SecondWeakCallback(
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const v8::WeakCallbackInfo<Wrappable>& data) {
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Wrappable* wrappable = data.GetParameter();
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delete wrappable;
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}
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v8::Local<v8::Object> Wrappable::GetWrapper(v8::Isolate* isolate) {
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if (!wrapper_.IsEmpty())
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return MATE_PERSISTENT_TO_LOCAL(v8::Object, isolate, wrapper_);
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v8::Local<v8::ObjectTemplate> templ =
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GetObjectTemplateBuilder(isolate).Build();
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CHECK(!templ.IsEmpty());
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CHECK_EQ(1, templ->InternalFieldCount());
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v8::Local<v8::Object> wrapper;
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// |wrapper| may be empty in some extreme cases, e.g., when
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// Object.prototype.constructor is overwritten.
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if (!templ->NewInstance(isolate->GetCurrentContext()).ToLocal(&wrapper)) {
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// The current wrappable object will be no longer managed by V8. Delete this
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// now.
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delete this;
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return wrapper;
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}
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Wrap(isolate, wrapper);
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return wrapper;
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}
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bool Wrappable::IsDestroyed() const {
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return false;
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}
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namespace internal {
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void* FromV8Impl(v8::Isolate* isolate, v8::Local<v8::Value> val) {
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if (!val->IsObject())
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return NULL;
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v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(val);
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if (obj->InternalFieldCount() != 1)
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return NULL;
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return MATE_GET_INTERNAL_FIELD_POINTER(obj, 0);
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}
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} // namespace internal
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} // namespace mate
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