1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "third_party/blink/renderer/core/workers/worker_module_tree_client.h" 6 7 #include "third_party/blink/renderer/bindings/core/v8/script_value.h" 8 #include "third_party/blink/renderer/core/execution_context/execution_context.h" 9 #include "third_party/blink/renderer/core/script/module_script.h" 10 #include "third_party/blink/renderer/core/workers/worker_global_scope.h" 11 #include "third_party/blink/renderer/core/workers/worker_reporting_proxy.h" 12 13 namespace blink { 14 WorkerModuleTreeClient(ScriptState * script_state)15WorkerModuleTreeClient::WorkerModuleTreeClient(ScriptState* script_state) 16 : script_state_(script_state) {} 17 18 // A partial implementation of the "Processing model" algorithm in the HTML 19 // WebWorker spec: 20 // https://html.spec.whatwg.org/C/#worker-processing-model NotifyModuleTreeLoadFinished(ModuleScript * module_script)21void WorkerModuleTreeClient::NotifyModuleTreeLoadFinished( 22 ModuleScript* module_script) { 23 auto* worker_global_scope = 24 To<WorkerGlobalScope>(ExecutionContext::From(script_state_)); 25 blink::WorkerReportingProxy& worker_reporting_proxy = 26 worker_global_scope->ReportingProxy(); 27 28 // Step 12. "If the algorithm asynchronously completes with null or with 29 // script whose error to rethrow is non-null, then:" 30 if (!module_script || module_script->HasErrorToRethrow()) { 31 // Step 12.1. "Queue a task to fire an event named error at worker." 32 // DidFailToFetchModuleScript() will asynchronously fire the event. 33 worker_reporting_proxy.DidFailToFetchModuleScript(); 34 35 // Step 12.2. "Run the environment discarding steps for inside settings." 36 // Do nothing because the HTML spec doesn't define these steps for web 37 // workers. 38 39 // Schedule worker termination. 40 worker_global_scope->close(); 41 42 // Step 12.3. "Return." 43 return; 44 } 45 worker_reporting_proxy.DidFetchScript(); 46 47 // Step 12: "Otherwise, continue the rest of these steps after the algorithm's 48 // asynchronous completion, with script being the asynchronous completion 49 // value." 50 worker_global_scope->WorkerScriptFetchFinished( 51 *module_script, base::nullopt /* v8_inspector::V8StackTraceId */); 52 } 53 Trace(Visitor * visitor)54void WorkerModuleTreeClient::Trace(Visitor* visitor) { 55 visitor->Trace(script_state_); 56 ModuleTreeClient::Trace(visitor); 57 } 58 59 } // namespace blink 60