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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/bindings/v8_per_context_data.h"
#include <stdlib.h>
#include <memory>
#include <utility>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/platform/bindings/origin_trial_features.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/v0_custom_element_binding.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/bindings/v8_object_constructor.h"
#include "third_party/blink/renderer/platform/bindings/wrapper_type_info.h"
#include "third_party/blink/renderer/platform/instance_counters.h"
namespace blink {
namespace {
constexpr char kWrapperBoilerplatesLabel[] =
"V8PerContextData::wrapper_boilerplates_";
constexpr char kConstructorMapLabel[] = "V8PerContextData::constructor_map_";
constexpr char kContextLabel[] = "V8PerContextData::context_";
} // namespace
V8PerContextData::V8PerContextData(v8::Local<v8::Context> context)
: isolate_(context->GetIsolate()),
wrapper_boilerplates_(isolate_, kWrapperBoilerplatesLabel),
constructor_map_(isolate_, kConstructorMapLabel),
context_holder_(std::make_unique<gin::ContextHolder>(isolate_)),
context_(isolate_, context),
activity_logger_(nullptr),
data_map_(MakeGarbageCollected<DataMap>()) {
context_holder_->SetContext(context);
context_.Get().AnnotateStrongRetainer(kContextLabel);
if (IsMainThread()) {
InstanceCounters::IncrementCounter(
InstanceCounters::kV8PerContextDataCounter);
}
}
V8PerContextData::~V8PerContextData() {
if (IsMainThread()) {
InstanceCounters::DecrementCounter(
InstanceCounters::kV8PerContextDataCounter);
}
}
V8PerContextData* V8PerContextData::From(v8::Local<v8::Context> context) {
return ScriptState::From(context)->PerContextData();
}
v8::Local<v8::Object> V8PerContextData::CreateWrapperFromCacheSlowCase(
const WrapperTypeInfo* type) {
v8::Context::Scope scope(GetContext());
v8::Local<v8::Function> interface_object = ConstructorForType(type);
CHECK(!interface_object.IsEmpty());
v8::Local<v8::Object> instance_template =
V8ObjectConstructor::NewInstance(isolate_, interface_object)
.ToLocalChecked();
wrapper_boilerplates_.Set(type, instance_template);
return instance_template->Clone();
}
v8::Local<v8::Function> V8PerContextData::ConstructorForTypeSlowCase(
const WrapperTypeInfo* type) {
v8::Local<v8::Context> context = GetContext();
v8::Context::Scope scope(context);
v8::Local<v8::Function> parent_interface_object;
if (type->parent_class) {
parent_interface_object = ConstructorForType(type->parent_class);
}
const DOMWrapperWorld& world = DOMWrapperWorld::World(context);
v8::Local<v8::Function> interface_object =
V8ObjectConstructor::CreateInterfaceObject(
type, context, world, isolate_, parent_interface_object,
V8ObjectConstructor::CreationMode::kInstallConditionalFeatures);
constructor_map_.Set(type, interface_object);
return interface_object;
}
v8::Local<v8::Object> V8PerContextData::PrototypeForType(
const WrapperTypeInfo* type) {
v8::Local<v8::Object> constructor = ConstructorForType(type);
if (constructor.IsEmpty())
return v8::Local<v8::Object>();
v8::Local<v8::Value> prototype_value;
if (!constructor->Get(GetContext(), V8AtomicString(isolate_, "prototype"))
.ToLocal(&prototype_value) ||
!prototype_value->IsObject())
return v8::Local<v8::Object>();
return prototype_value.As<v8::Object>();
}
bool V8PerContextData::GetExistingConstructorAndPrototypeForType(
const WrapperTypeInfo* type,
v8::Local<v8::Object>* prototype_object,
v8::Local<v8::Function>* interface_object) {
*interface_object = constructor_map_.Get(type);
if (interface_object->IsEmpty()) {
*prototype_object = v8::Local<v8::Object>();
return false;
}
*prototype_object = PrototypeForType(type);
DCHECK(!prototype_object->IsEmpty());
return true;
}
void V8PerContextData::AddCustomElementBinding(
std::unique_ptr<V0CustomElementBinding> binding) {
custom_element_bindings_.push_back(std::move(binding));
}
void V8PerContextData::AddData(const char* key, Data* data) {
data_map_->Set(key, data);
}
void V8PerContextData::ClearData(const char* key) {
data_map_->erase(key);
}
V8PerContextData::Data* V8PerContextData::GetData(const char* key) {
return data_map_->at(key);
}
} // namespace blink