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// Copyright 2017 The Chromium Authors
// 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/containers/span.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,
base::span<v8::Local<v8::Value>> args) {
RunJSFunction(function, context, args, ResultCallback());
}
} // namespace extensions
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