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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/workers/worker_module_tree_client.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/script/module_script.h"
#include "third_party/blink/renderer/core/workers/worker_global_scope.h"
#include "third_party/blink/renderer/core/workers/worker_reporting_proxy.h"
namespace blink {
WorkerModuleTreeClient::WorkerModuleTreeClient(ScriptState* script_state)
: script_state_(script_state) {}
// A partial implementation of the "Processing model" algorithm in the HTML
// WebWorker spec:
// https://html.spec.whatwg.org/C/#worker-processing-model
void WorkerModuleTreeClient::NotifyModuleTreeLoadFinished(
ModuleScript* module_script) {
auto* worker_global_scope =
To<WorkerGlobalScope>(ExecutionContext::From(script_state_));
blink::WorkerReportingProxy& worker_reporting_proxy =
worker_global_scope->ReportingProxy();
// Step 12. "If the algorithm asynchronously completes with null, then:"
if (!module_script) {
// Step 12.1. "Queue a task to fire an event named error at worker."
// DidFailToFetchModuleScript() will asynchronously fire the event.
worker_reporting_proxy.DidFailToFetchModuleScript();
// Step 12.2. "Run the environment discarding steps for inside settings."
// Do nothing because the HTML spec doesn't define these steps for web
// workers.
// Schedule worker termination.
worker_global_scope->close();
// Step 12.3. "Return."
return;
}
worker_reporting_proxy.DidFetchScript();
// Step 12: "Otherwise, continue the rest of these steps after the algorithm's
// asynchronous completion, with script being the asynchronous completion
// value."
worker_global_scope->WorkerScriptFetchFinished(
*module_script, base::nullopt /* v8_inspector::V8StackTraceId */);
}
void WorkerModuleTreeClient::Trace(blink::Visitor* visitor) {
visitor->Trace(script_state_);
ModuleTreeClient::Trace(visitor);
}
} // namespace blink
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