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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 "third_party/blink/renderer/core/script/module_script.h"
#include "base/feature_list.h"
#include "base/macros.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/bindings/core/v8/module_record.h"
#include "third_party/blink/renderer/bindings/core/v8/script_evaluation_result.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/bindings/core/v8/worker_or_worklet_script_controller.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/script/module_record_resolver.h"
#include "third_party/blink/renderer/core/workers/worker_or_worklet_global_scope.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "v8/include/v8.h"
namespace blink {
ModuleScript::ModuleScript(Modulator* settings_object,
v8::Local<v8::Module> record,
const KURL& source_url,
const KURL& base_url,
const ScriptFetchOptions& fetch_options)
: Script(fetch_options, base_url),
settings_object_(settings_object),
source_url_(source_url) {
if (record.IsEmpty()) {
// We allow empty records for module infra tests which never touch records.
// This should never happen outside unit tests.
return;
}
DCHECK(settings_object);
v8::Isolate* isolate = settings_object_->GetScriptState()->GetIsolate();
v8::HandleScope scope(isolate);
record_.Set(isolate, record);
}
v8::Local<v8::Module> ModuleScript::V8Module() const {
if (record_.IsEmpty()) {
return v8::Local<v8::Module>();
}
v8::Isolate* isolate = settings_object_->GetScriptState()->GetIsolate();
return record_.NewLocal(isolate);
}
bool ModuleScript::HasEmptyRecord() const {
return record_.IsEmpty();
}
void ModuleScript::SetParseErrorAndClearRecord(ScriptValue error) {
DCHECK(!error.IsEmpty());
record_.Clear();
parse_error_.Set(settings_object_->GetScriptState()->GetIsolate(),
error.V8Value());
}
ScriptValue ModuleScript::CreateParseError() const {
ScriptState* script_state = settings_object_->GetScriptState();
ScriptState::Scope scope(script_state);
ScriptValue error(script_state->GetIsolate(), parse_error_.Get(script_state));
DCHECK(!error.IsEmpty());
return error;
}
void ModuleScript::SetErrorToRethrow(ScriptValue error) {
ScriptState* script_state = settings_object_->GetScriptState();
ScriptState::Scope scope(script_state);
error_to_rethrow_.Set(script_state->GetIsolate(), error.V8Value());
}
ScriptValue ModuleScript::CreateErrorToRethrow() const {
ScriptState* script_state = settings_object_->GetScriptState();
ScriptState::Scope scope(script_state);
ScriptValue error(script_state->GetIsolate(),
error_to_rethrow_.Get(script_state));
DCHECK(!error.IsEmpty());
return error;
}
KURL ModuleScript::ResolveModuleSpecifier(const String& module_request,
String* failure_reason) const {
auto found = specifier_to_url_cache_.find(module_request);
if (found != specifier_to_url_cache_.end())
return found->value;
KURL url = SettingsObject()->ResolveModuleSpecifier(module_request, BaseURL(),
failure_reason);
// Cache the result only on success, so that failure_reason is set for
// subsequent calls too.
if (url.IsValid())
specifier_to_url_cache_.insert(module_request, url);
return url;
}
void ModuleScript::Trace(Visitor* visitor) const {
visitor->Trace(settings_object_);
visitor->Trace(record_.UnsafeCast<v8::Value>());
visitor->Trace(parse_error_);
visitor->Trace(error_to_rethrow_);
Script::Trace(visitor);
}
void ModuleScript::RunScript(LocalDOMWindow*) {
// We need a HandleScope for the `ScriptEvaluationResult` returned from
// `RunScriptAndReturnValue`.
v8::HandleScope scope(SettingsObject()->GetScriptState()->GetIsolate());
DVLOG(1) << *this << "::RunScript()";
ignore_result(RunScriptAndReturnValue());
}
bool ModuleScript::RunScriptOnWorkerOrWorklet(
WorkerOrWorkletGlobalScope& global_scope) {
// We need a HandleScope for the `ScriptEvaluationResult` returned from
// `RunScriptAndReturnValue`.
v8::HandleScope scope(SettingsObject()->GetScriptState()->GetIsolate());
DCHECK(global_scope.IsContextThread());
// TODO(nhiroki): Catch an error when an evaluation error happens.
// (https://crbug.com/680046)
ScriptEvaluationResult result = RunScriptAndReturnValue();
// Service workers prohibit async module graphs (those with top-level await),
// so the promise result from executing a service worker module is always
// settled. To maintain compatibility with synchronous module graphs, rejected
// promises are considered synchronous failures in service workers.
//
// https://github.com/w3c/ServiceWorker/pull/1444
if (base::FeatureList::IsEnabled(features::kTopLevelAwait) &&
global_scope.IsServiceWorkerGlobalScope() &&
result.GetResultType() == ScriptEvaluationResult::ResultType::kSuccess) {
v8::Local<v8::Promise> promise = result.GetSuccessValue().As<v8::Promise>();
DCHECK_NE(promise->State(), v8::Promise::kPending);
return promise->State() == v8::Promise::kFulfilled;
}
return result.GetResultType() == ScriptEvaluationResult::ResultType::kSuccess;
}
ScriptEvaluationResult ModuleScript::RunScriptAndReturnValue(
V8ScriptRunner::RethrowErrorsOption rethrow_errors) {
return V8ScriptRunner::EvaluateModule(this, std::move(rethrow_errors));
}
std::pair<size_t, size_t> ModuleScript::GetClassicScriptSizes() const {
return std::pair<size_t, size_t>(0, 0);
}
std::ostream& operator<<(std::ostream& stream,
const ModuleScript& module_script) {
stream << "ModuleScript[" << &module_script;
if (module_script.HasEmptyRecord())
stream << ", empty-record";
if (module_script.HasErrorToRethrow())
stream << ", error-to-rethrow";
if (module_script.HasParseError())
stream << ", parse-error";
return stream << "]";
}
} // namespace blink
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