third_party/blink/renderer/platform/bindings/script_wrappable.cc

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"

#include "third_party/blink/renderer/platform/bindings/dom_data_store.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/v8_dom_wrapper.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"

namespace blink {

struct SameSizeAsScriptWrappable {
  virtual ~SameSizeAsScriptWrappable() = default;
  v8::Persistent<v8::Object> main_world_wrapper_;
};

ASSERT_SIZE(ScriptWrappable, SameSizeAsScriptWrappable);

v8::Local<v8::Value> ScriptWrappable::ToV8(ScriptState* script_state) {
  v8::Local<v8::Object> wrapper;
  if (DOMDataStore::GetWrapper(script_state, this).ToLocal(&wrapper))
      [[likely]] {
    return wrapper;
  }
  return Wrap(script_state);
}

v8::Local<v8::Value> ScriptWrappable::ToV8(
    v8::Isolate* isolate,
    v8::Local<v8::Object> creation_context_object) {
  v8::Local<v8::Object> wrapper;
  if (DOMDataStore::GetWrapper(isolate, this).ToLocal(&wrapper)) [[likely]] {
    return wrapper;
  }
  CHECK(!creation_context_object.IsEmpty());
  ScriptState* script_state =
      ScriptState::ForRelevantRealm(isolate, creation_context_object);
  return Wrap(script_state);
}

v8::Local<v8::Value> ScriptWrappable::Wrap(ScriptState* script_state) {
  const WrapperTypeInfo* wrapper_type_info = ToWrapperTypeInfo(this);

  DCHECK(!DOMDataStore::ContainsWrapper(script_state->GetIsolate(), this));

  v8::Local<v8::Object> wrapper =
      V8DOMWrapper::CreateWrapper(script_state, wrapper_type_info);
  return AssociateWithWrapper(script_state->GetIsolate(), wrapper_type_info,
                              wrapper);
}

v8::Local<v8::Object> ScriptWrappable::AssociateWithWrapper(
    v8::Isolate* isolate,
    const WrapperTypeInfo* wrapper_type_info,
    v8::Local<v8::Object> wrapper) {
  return V8DOMWrapper::AssociateObjectWithWrapper(isolate, this,
                                                  wrapper_type_info, wrapper);
}

void ScriptWrappable::Trace(Visitor* visitor) const {
  v8::Object::Wrappable::Trace(visitor);
  visitor->Trace(wrapper_);
}

const char* ScriptWrappable::GetHumanReadableName() const {
  return ToWrapperTypeInfo(this)->interface_name;
}

}  // namespace blink