[DO NOT SUBMIT] AudioWorklet FS1: importing scripts

third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScope.cpp

+// Copyright 2016 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/webaudio/AudioWorkletGlobalScope.h"
+
+#include "bindings/core/v8/V8BindingMacros.h"
+#include "bindings/core/v8/WorkerOrWorkletScriptController.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/inspector/MainThreadDebugger.h"
+#include "modules/webaudio/AudioWorkletProcessorDefinition.h"
+
+namespace blink {
+
+// static
+AudioWorkletGlobalScope* AudioWorkletGlobalScope::create(LocalFrame* frame, const KURL& url, const String& userAgent, PassRefPtr<SecurityOrigin> securityOrigin, v8::Isolate* isolate)
+{
+    AudioWorkletGlobalScope* audioWorkletGlobalScope = new AudioWorkletGlobalScope(frame, url, userAgent, securityOrigin, isolate);
+    audioWorkletGlobalScope->scriptController()->initializeContextIfNeeded();
+    MainThreadDebugger::instance()->contextCreated(audioWorkletGlobalScope->scriptController()->getScriptState(), audioWorkletGlobalScope->frame(), audioWorkletGlobalScope->getSecurityOrigin());
+    return audioWorkletGlobalScope;
+}
+
+AudioWorkletGlobalScope::AudioWorkletGlobalScope(LocalFrame* frame, const KURL& url, const String& userAgent, PassRefPtr<SecurityOrigin> securityOrigin, v8::Isolate* isolate)
+    : WorkletGlobalScope(frame, url, userAgent, securityOrigin, isolate)
+{
+}
+
+AudioWorkletGlobalScope::~AudioWorkletGlobalScope()
+{
+}
+
+void AudioWorkletGlobalScope::dispose()
+{
+    // Explicitly clear the processor definitions to break a reference cycle
+    // between them and this global scope.
+    m_processorDefinitions.clear();
+
+    WorkletGlobalScope::dispose();
+}
+
+void AudioWorkletGlobalScope::registerAudioWorkletProcessor(const String& name, const ScriptValue& ctorValue, ExceptionState& exceptionState)
+{
+    if (m_processorDefinitions.contains(name)) {
+        exceptionState.throwDOMException(NotSupportedError, "A class with name:'" + name + "' is already registered.");
+        return;
+    }
+
+    if (name.isEmpty()) {
+        exceptionState.throwTypeError("The empty string is not a valid name.");
+        return;
+    }
+
+    v8::Isolate* isolate = scriptController()->getScriptState()->isolate();
+    v8::Local<v8::Context> context = scriptController()->context();
+
+    ASSERT(ctorValue.v8Value()->IsFunction());
+    v8::Local<v8::Function> constructor = v8::Local<v8::Function>::Cast(ctorValue.v8Value());
+
+    v8::Local<v8::Value> prototypeValue;
+    if (!v8Call(constructor->Get(context, v8String(isolate, "prototype")), prototypeValue))
+        return;
+
+    if (isUndefinedOrNull(prototypeValue)) {
+        exceptionState.throwTypeError("The 'prototype' object on the class does not exist.");
+        return;
+    }
+
+    if (!prototypeValue->IsObject()) {
+        exceptionState.throwTypeError("The 'prototype' property on the class is not an object.");
+        return;
+    }
+
+    v8::Local<v8::Object> prototype = v8::Local<v8::Object>::Cast(prototypeValue);
+
+    v8::Local<v8::Value> processValue;
+    if (!v8Call(prototype->Get(context, v8String(isolate, "process")), processValue))
+        return;
+
+    if (isUndefinedOrNull(processValue)) {
+        exceptionState.throwTypeError("The 'process' function on the prototype does not exist.");
+        return;
+    }
+
+    if (!processValue->IsFunction()) {
+        exceptionState.throwTypeError("The 'process' property on the prototype is not a function.");
+        return;
+    }
+
+    v8::Local<v8::Function> process = v8::Local<v8::Function>::Cast(processValue);
+
+    AudioWorkletProcessorDefinition* definition = AudioWorkletProcessorDefinition::create(scriptController()->getScriptState(), constructor, process);
+    m_processorDefinitions.set(name, definition);
+}
+
+AudioWorkletProcessorDefinition* AudioWorkletGlobalScope::findDefinition(const String& name)
+{
+    return m_processorDefinitions.get(name);
+}
+
+DEFINE_TRACE(AudioWorkletGlobalScope)
+{
+    visitor->trace(m_processorDefinitions);
+    WorkletGlobalScope::trace(visitor);
+}
+
+} // namespace blink