[Do not submit] Worklet implementation.

third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp

+// Copyright 2015 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 "config.h"
+#include "modules/worklet/WorkletGlobalScope.h"
+
+#include "bindings/modules/v8/WorkletScriptController.h"
+#include "core/events/EventQueue.h"
+#include "platform/weborigin/KURL.h"
+
+namespace blink {
+
+namespace {
+
+// Worklets don't have an event queue which does anything. Inheriting
+// from ExecutionContext requires an EventQueue so we just create one than will
+// assert that it's not called.
+class WorkletEventQueue final : public EventQueue {
+public:
+    WorkletEventQueue() { }
+    ~WorkletEventQueue() override { }
+    bool enqueueEvent(PassRefPtrWillBeRawPtr<Event>) override { return false; } // XXX ASSERT NOT REACHED?
+    bool cancelEvent(Event*) override { return false; } // XXX ASSERT NOT REACHED
+    void close() override { }
+};
+
+} // namespace
+
+// static
+PassRefPtrWillBeRawPtr<WorkletGlobalScope> WorkletGlobalScope::create(v8::Isolate* isolate)
+{
+    return adoptRefWillBeNoop(new WorkletGlobalScope(isolate));
+}
+
+WorkletGlobalScope::WorkletGlobalScope(v8::Isolate* isolate)
+    : m_url(KURL())
+    , m_isolate(isolate)
+    , m_script(WorkletScriptController::create(this, m_isolate))
+    , m_queue(adoptPtrWillBeNoop(new WorkletEventQueue()))
+{
+}
+
+WorkletGlobalScope::~WorkletGlobalScope()
+{
+}
+
+GlobalScopeScriptController* WorkletGlobalScope::script()
+{
+    m_script->initializeContextIfNeeded();
+    return m_script.get();
+}
+
+v8::Local<v8::Object> WorkletGlobalScope::wrap(v8::Isolate*, v8::Local<v8::Object> creationContext) // XXX move to AbstractGlobalScope
+{
+    // WorkletGlobalScope must never be wrapped with wrap method.  The global
+    // object of ECMAScript environment is used as the wrapper.
+    RELEASE_ASSERT_NOT_REACHED();
+    return v8::Local<v8::Object>();
+}
+
+v8::Local<v8::Object> WorkletGlobalScope::associateWithWrapper(v8::Isolate*, const WrapperTypeInfo*, v8::Local<v8::Object> wrapper) // XXX move to AbstractGlobalScope
+{
+    RELEASE_ASSERT_NOT_REACHED(); // same as wrap method
+    return v8::Local<v8::Object>();
+}
+
+bool WorkletGlobalScope::isSecureContext(String& errorMessage, const SecureContextCheck privilegeContextCheck) const
+{
+    // Until there are APIs that are available in worklets and that
+    // require a privileged context test that checks ancestors, just do
+    // a simple check here. Once we have a need for a real
+    // |isSecureContext| check here, we can check the responsible
+    // document for a privileged context at worker creation time, pass
+    // it in via WorkerThreadStartupData, and check it here.
+    return securityOrigin()->isPotentiallyTrustworthy(errorMessage);
+}
+
+const KURL& WorkletGlobalScope::virtualURL() const
+{
+    return m_url;
+}
+
+KURL WorkletGlobalScope::virtualCompleteURL(const String& url) const
+{
+    // Always return a null URL when passed a null string.
+    // FIXME: Should we change the KURL constructor to have this behavior?
+    if (url.isNull())
+        return KURL();
+    // Always use UTF-8 in Workers.
+    return KURL(m_url, url);
+}
+
+DEFINE_TRACE(WorkletGlobalScope)
+{
+#if ENABLE(OILPAN)
+    visitor->trace(m_queue);
+#endif
+    AbstractGlobalScope::trace(visitor);
+}
+
+} // namespace blink