Worklet: Introduce PaintWorkletGlobalScopeProxy

third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScopeProxy.cpp

+// 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 "modules/csspaint/PaintWorkletGlobalScopeProxy.h"
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/V8BindingForCore.h"
+#include "core/dom/Document.h"
+#include "core/frame/LocalFrame.h"
+#include "platform/weborigin/KURL.h"
+#include "platform/wtf/WTF.h"
+
+namespace blink {
+
+PaintWorkletGlobalScopeProxy* PaintWorkletGlobalScopeProxy::From(
+    WorkletGlobalScopeProxy* proxy) {
+  return static_cast<PaintWorkletGlobalScopeProxy*>(proxy);
+}
+
+PaintWorkletGlobalScopeProxy::PaintWorkletGlobalScopeProxy(LocalFrame* frame) {
+  DCHECK(IsMainThread());
+  Document* document = frame->GetDocument();
+  global_scope_ = PaintWorkletGlobalScope::Create(
+      frame, document->Url(), document->UserAgent(),
+      document->GetSecurityOrigin(), ToIsolate(document));
+}
+
+void PaintWorkletGlobalScopeProxy::FetchAndInvokeScript(
+    const KURL& module_url_record,
+    WorkletPendingTasks* pending_tasks) {
+  DCHECK(IsMainThread());
+  global_scope_->FetchAndInvokeScript(module_url_record, pending_tasks);
+}
+
+void PaintWorkletGlobalScopeProxy::EvaluateScript(
+    const ScriptSourceCode& script_source_code) {
+  // This should be called only for threaded worklets that still use classic
+  // script loading.
+  NOTREACHED();
+}
+
+void PaintWorkletGlobalScopeProxy::TerminateWorkletGlobalScope() {
+  DCHECK(IsMainThread());
+  global_scope_->Terminate();
+  // Nullify the global scope to cut a potential reference cycle.
+  global_scope_ = nullptr;
+}
+
+CSSPaintDefinition* PaintWorkletGlobalScopeProxy::FindDefinition(
+    const String& name) {
+  DCHECK(IsMainThread());
+  return global_scope_->FindDefinition(name);
+}
+
+void PaintWorkletGlobalScopeProxy::AddPendingGenerator(
+    const String& name,
+    CSSPaintImageGeneratorImpl* generator) {
+  DCHECK(IsMainThread());
+  global_scope_->AddPendingGenerator(name, generator);
+}
+
+}  // namespace blink