ServiceWorker: Introduce ServiceWorkerMessageEvent to replace MessageEvent (3/3).

Source/bindings/modules/v8/custom/V8ServiceWorkerMessageEventCustom.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 "bindings/modules/v8/V8ServiceWorkerMessageEvent.h"
+
+#include "bindings/core/v8/Dictionary.h"
+#include "bindings/core/v8/SerializedScriptValue.h"
+#include "bindings/core/v8/SerializedScriptValueFactory.h"
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8DOMWrapper.h"
+#include "bindings/core/v8/V8Event.h"
+#include "bindings/core/v8/V8HiddenValue.h"
+#include "bindings/core/v8/V8MessagePort.h"
+#include "bindings/modules/v8/V8ServiceWorker.h"
+
+namespace blink {
+
+static bool initializeServiceWorkerMessageEvent(ServiceWorkerMessageEventInit& eventInit, const Dictionary& options, ExceptionState& exceptionState, const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    Dictionary::ConversionContext conversionContext(exceptionState);
+    if (!initializeEvent(eventInit, options, exceptionState, info))
+        return false;
+
+    if (!DictionaryHelper::convert(options, conversionContext.setConversionType("DOMString", false), "origin", eventInit.origin))
+        return false;
+    if (!DictionaryHelper::convert(options, conversionContext.setConversionType("DOMString", false), "lastEventId", eventInit.lastEventId))
+        return false;
+    if (!DictionaryHelper::convert(options, conversionContext.setConversionType("MessagePort[]", false), "ports", eventInit.ports))
+        return false;
+    return true;
+}
+
+static void setEventSource(PassRefPtrWillBeRawPtr<ServiceWorkerMessageEvent> event, v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState)
+{
+    if (value.IsEmpty() || isUndefinedOrNull(value))
+        return;
+    if (V8ServiceWorker::hasInstance(value, isolate)) {
+        ServiceWorker* source = V8ServiceWorker::toImpl(v8::Local<v8::Object>::Cast(value));
+        event->setSource(source);
+        return;
+    }
+    if (V8MessagePort::hasInstance(value, isolate)) {
+        MessagePort* source = V8MessagePort::toImpl(v8::Local<v8::Object>::Cast(value));
+        event->setSource(source);
+        return;
+    }
+    exceptionState.throwTypeError("The 'source' type is neither a ServiceWorker nor MessagePort");
+}
+
+static v8::Local<v8::Value> cacheState(v8::Isolate* isolate, v8::Local<v8::Object> event, v8::Local<v8::Value> data)
+{
+    V8HiddenValue::setHiddenValue(isolate, event, V8HiddenValue::data(isolate), data);
+    return data;
+}
+
+void V8ServiceWorkerMessageEvent::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    ExceptionState exceptionState(ExceptionState::ConstructionContext, "ServiceWorkerMessageEvent", info.Holder(), info.GetIsolate());
+    if (info.Length() < 1) {
+        exceptionState.throwTypeError("An event name must be provided.");
+        exceptionState.throwIfNeeded();
+        return;
+    }
+
+    V8StringResource<> type(info[0]);
+    if (!type.prepare())
+        return;
+    v8::Local<v8::Value> source;
+    v8::Local<v8::Value> data;
+    ServiceWorkerMessageEventInit eventInit;
+    if (info.Length() >= 2) {
+        Dictionary options(info[1], info.GetIsolate(), exceptionState);
+        if (!initializeServiceWorkerMessageEvent(eventInit, options, exceptionState, info)) {
+            exceptionState.throwIfNeeded();
+            return;
+        }
+        options.get("source", source);
+        options.get("data", data);
+        if (!data.IsEmpty())
+            V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "data"), data);
+    }
+    RefPtrWillBeRawPtr<ServiceWorkerMessageEvent> event = ServiceWorkerMessageEvent::create(type, eventInit);
+    setEventSource(event, info.GetIsolate(), source, exceptionState);
+    if (exceptionState.throwIfNeeded())
+        return;
+    if (DOMWrapperWorld::current(info.GetIsolate()).isIsolatedWorld()) {
+        if (!data.IsEmpty())
+            event->setSerializedData(SerializedScriptValueFactory::instance().createAndSwallowExceptions(info.GetIsolate(), data));
+    }
+
+    v8::Local<v8::Object> wrapper = info.Holder();
+    event->associateWithWrapper(info.GetIsolate(), &V8ServiceWorkerMessageEvent::wrapperTypeInfo, wrapper);
+    v8SetReturnValue(info, wrapper);
+}
+
+void V8ServiceWorkerMessageEvent::sourceAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    ServiceWorkerMessageEvent* event = V8ServiceWorkerMessageEvent::toImpl(info.Holder());
+    RefPtrWillBeRawPtr<ServiceWorker> sourceAsServiceWorker = event->sourceAsServiceWorker();
+    RefPtrWillBeRawPtr<MessagePort> sourceAsMessagePort = event->sourceAsMessagePort();
+    ASSERT(sourceAsServiceWorker && sourceAsMessagePort);
+    if (sourceAsServiceWorker)
+        v8SetReturnValue(info, toV8(sourceAsServiceWorker, info.Holder(), info.GetIsolate()));
+    else if (sourceAsMessagePort)
+        v8SetReturnValue(info, toV8(sourceAsMessagePort, info.Holder(), info.GetIsolate()));
+    else
+        v8SetReturnValue(info, v8::Null(info.GetIsolate()));
+}
+
+void V8ServiceWorkerMessageEvent::dataAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    ServiceWorkerMessageEvent* event = V8ServiceWorkerMessageEvent::toImpl(info.Holder());
+
+    v8::Local<v8::Value> result = V8HiddenValue::getHiddenValue(info.GetIsolate(), info.Holder(), V8HiddenValue::data(info.GetIsolate()));
+
+    if (!result.IsEmpty()) {
+        v8SetReturnValue(info, result);
+        return;
+    }
+
+    if (!event->serializedData()) {
+        // If we're in an isolated world and the event was created in the main world,
+        // we need to find the 'data' property on the main world wrapper and clone it.
+        v8::Local<v8::Value> mainWorldData = V8HiddenValue::getHiddenValueFromMainWorldWrapper(info.GetIsolate(), event, V8HiddenValue::data(info.GetIsolate()));
+        if (!mainWorldData.IsEmpty())
+            event->setSerializedData(SerializedScriptValueFactory::instance().createAndSwallowExceptions(info.GetIsolate(), mainWorldData));
+    }
+
+    if (event->serializedData()) {
+        MessagePortArray ports = event->ports();
+        result = event->serializedData()->deserialize(info.GetIsolate(), &ports);
+        v8SetReturnValue(info, cacheState(info.GetIsolate(), info.Holder(), result));
+        return;
+    }
+
+    v8SetReturnValue(info, cacheState(info.GetIsolate(), info.Holder(), v8::Null(info.GetIsolate())));
+}
+
+void V8ServiceWorkerMessageEvent::initServiceWorkerMessageEventMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    ExceptionState exceptionState(ExceptionState::ExecutionContext, "initServiceWorkerMessageEvent", "ServiceWorkerMessageEvent", info.Holder(), info.GetIsolate());
+    ServiceWorkerMessageEvent* event = V8ServiceWorkerMessageEvent::toImpl(info.Holder());
+    TOSTRING_VOID(V8StringResource<>, typeArg, info[0]);
+    bool canBubbleArg;
+    bool cancelableArg;
+    if (!v8Call(info[1]->BooleanValue(info.GetIsolate()->GetCurrentContext()), canBubbleArg)
+        || !v8Call(info[2]->BooleanValue(info.GetIsolate()->GetCurrentContext()), cancelableArg))
+        return;
+    v8::Local<v8::Value> dataArg = info[3];
+    TOSTRING_VOID(V8StringResource<>, originArg, info[4]);
+    TOSTRING_VOID(V8StringResource<>, lastEventIdArg, info[5]);
+    v8::Local<v8::Value> sourceArg = info[6];
+    setEventSource(event, info.GetIsolate(), sourceArg, exceptionState);
+    if (exceptionState.throwIfNeeded())
+        return;
+    OwnPtrWillBeRawPtr<MessagePortArray> portArray = nullptr;
+    const int portArrayIndex = 7;
+    if (!isUndefinedOrNull(info[portArrayIndex])) {
+        portArray = adoptPtrWillBeNoop(new MessagePortArray);
+        *portArray = toRefPtrWillBeMemberNativeArray<MessagePort, V8MessagePort>(info[portArrayIndex], portArrayIndex + 1, info.GetIsolate(), exceptionState);
+        if (exceptionState.throwIfNeeded())
+            return;
+    }
+    event->initServiceWorkerMessageEvent(typeArg, canBubbleArg, cancelableArg, originArg, lastEventIdArg, portArray.release());
+
+    if (!dataArg.IsEmpty()) {
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), V8HiddenValue::data(info.GetIsolate()), dataArg);
+        if (DOMWrapperWorld::current(info.GetIsolate()).isIsolatedWorld())
+            event->setSerializedData(SerializedScriptValueFactory::instance().createAndSwallowExceptions(info.GetIsolate(), dataArg));
+    }
+}
+
+} // namespace blink