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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "extensions/renderer/bindings/js_runner.h"
- #include "base/supports_user_data.h"
- #include "gin/per_context_data.h"
- namespace extensions {
- namespace {
- constexpr char kExtensionJSRunnerPerContextKey[] = "extension_js_runner";
- struct JSRunnerPerContextData : public base::SupportsUserData::Data {
- explicit JSRunnerPerContextData(std::unique_ptr<JSRunner> js_runner)
- : js_runner(std::move(js_runner)) {}
- ~JSRunnerPerContextData() override {}
- std::unique_ptr<JSRunner> js_runner;
- };
- JSRunner* g_instance_for_testing = nullptr;
- } // namespace
- // static
- JSRunner* JSRunner::Get(v8::Local<v8::Context> context) {
- if (g_instance_for_testing)
- return g_instance_for_testing;
- gin::PerContextData* per_context_data = gin::PerContextData::From(context);
- if (!per_context_data)
- return nullptr;
- auto* data = static_cast<JSRunnerPerContextData*>(
- per_context_data->GetUserData(kExtensionJSRunnerPerContextKey));
- if (!data)
- return nullptr;
- return data->js_runner.get();
- }
- void JSRunner::SetInstanceForContext(v8::Local<v8::Context> context,
- std::unique_ptr<JSRunner> js_runner) {
- gin::PerContextData* per_context_data = gin::PerContextData::From(context);
- // We should never try to set an instance for a context that's being torn
- // down.
- CHECK(per_context_data);
- // We should never have an existing instance for this context.
- DCHECK(!per_context_data->GetUserData(kExtensionJSRunnerPerContextKey));
- per_context_data->SetUserData(
- kExtensionJSRunnerPerContextKey,
- std::make_unique<JSRunnerPerContextData>(std::move(js_runner)));
- }
- void JSRunner::ClearInstanceForContext(v8::Local<v8::Context> context) {
- gin::PerContextData* per_context_data = gin::PerContextData::From(context);
- // We should never try to clear an instance for a context that's being torn
- // down.
- CHECK(per_context_data);
- // We should always have an existing instance for this context.
- DCHECK(per_context_data->GetUserData(kExtensionJSRunnerPerContextKey));
- per_context_data->SetUserData(kExtensionJSRunnerPerContextKey, nullptr);
- }
- void JSRunner::SetInstanceForTesting(JSRunner* js_runner) {
- g_instance_for_testing = js_runner;
- }
- JSRunner* JSRunner::GetInstanceForTesting() {
- return g_instance_for_testing;
- }
- void JSRunner::RunJSFunction(v8::Local<v8::Function> function,
- v8::Local<v8::Context> context,
- int argc,
- v8::Local<v8::Value> argv[]) {
- RunJSFunction(function, context, argc, argv, ResultCallback());
- }
- } // namespace extensions
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