C++ JSArray::getIndex方法代码示例

JSValue JSInspectorFrontendHost::showContextMenu(ExecState* execState, const ArgList& args)
{
    if (args.size() < 2)
        return jsUndefined();

    Event* event = toEvent(args.at(0));

    JSArray* array = asArray(args.at(1));
    Vector<ContextMenuItem*> items;

    for (size_t i = 0; i < array->length(); ++i) {
        JSObject* item = asObject(array->getIndex(i));
        JSValue label = item->get(execState, Identifier(execState, "label"));
        JSValue id = item->get(execState, Identifier(execState, "id"));
        if (label.isUndefined() || id.isUndefined())
            items.append(new ContextMenuItem(SeparatorType, ContextMenuItemTagNoAction, String()));
        else {
            ContextMenuAction typedId = static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + id.toInt32(execState));
            items.append(new ContextMenuItem(ActionType, typedId, label.toString(execState)));
        }
    }

    impl()->showContextMenu(event, items);
    return jsUndefined();
}

static CryptoKeyUsageBitmap cryptoKeyUsagesFromJSValue(ExecState& state, ThrowScope& scope, JSValue value)
{
    if (!isJSArray(value)) {
        throwTypeError(&state, scope);
        return { };
    }

    CryptoKeyUsageBitmap result = 0;
    JSArray* array = asArray(value);
    for (unsigned i = 0; i < array->length(); ++i) {
        auto usageString = array->getIndex(&state, i).toWTFString(&state);
        RETURN_IF_EXCEPTION(scope, { });
        if (usageString == "encrypt")
            result |= CryptoKeyUsageEncrypt;
        else if (usageString == "decrypt")
            result |= CryptoKeyUsageDecrypt;
        else if (usageString == "sign")
            result |= CryptoKeyUsageSign;
        else if (usageString == "verify")
            result |= CryptoKeyUsageVerify;
        else if (usageString == "deriveKey")
            result |= CryptoKeyUsageDeriveKey;
        else if (usageString == "deriveBits")
            result |= CryptoKeyUsageDeriveBits;
        else if (usageString == "wrapKey")
            result |= CryptoKeyUsageWrapKey;
        else if (usageString == "unwrapKey")
            result |= CryptoKeyUsageUnwrapKey;
    }
    return result;
}

static bool cryptoKeyUsagesFromJSValue(ExecState* exec, JSValue value, CryptoKeyUsage& result)
{
    if (!isJSArray(value)) {
        throwTypeError(exec);
        return false;
    }

    result = 0;

    JSArray* array = asArray(value);
    for (size_t i = 0; i < array->length(); ++i) {
        JSValue element = array->getIndex(exec, i);
        String usageString = element.toString(exec)->value(exec);
        if (exec->hadException())
            return false;
        if (usageString == "encrypt")
            result |= CryptoKeyUsageEncrypt;
        else if (usageString == "decrypt")
            result |= CryptoKeyUsageDecrypt;
        else if (usageString == "sign")
            result |= CryptoKeyUsageSign;
        else if (usageString == "verify")
            result |= CryptoKeyUsageVerify;
        else if (usageString == "deriveKey")
            result |= CryptoKeyUsageDeriveKey;
        else if (usageString == "deriveBits")
            result |= CryptoKeyUsageDeriveBits;
        else if (usageString == "wrapKey")
            result |= CryptoKeyUsageWrapKey;
        else if (usageString == "unwrapKey")
            result |= CryptoKeyUsageUnwrapKey;
    }
    return true;
}

static RefPtr<InspectorValue> jsToInspectorValue(ExecState* scriptState, JSValue value, int maxDepth)
{
    if (!value) {
        ASSERT_NOT_REACHED();
        return nullptr;
    }

    if (!maxDepth)
        return nullptr;

    maxDepth--;

    if (value.isNull() || value.isUndefined())
        return InspectorValue::null();
    if (value.isBoolean())
        return InspectorValue::create(value.asBoolean());
    if (value.isNumber() && value.isDouble())
        return InspectorValue::create(value.asNumber());
    if (value.isNumber() && value.isMachineInt())
        return InspectorValue::create(static_cast<int>(value.asMachineInt()));
    if (value.isString())
        return InspectorValue::create(value.getString(scriptState));

    if (value.isObject()) {
        if (isJSArray(value)) {
            Ref<InspectorArray> inspectorArray = InspectorArray::create();
            JSArray* array = asArray(value);
            unsigned length = array->length();
            for (unsigned i = 0; i < length; i++) {
                JSValue element = array->getIndex(scriptState, i);
                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element, maxDepth);
                if (!elementValue)
                    return nullptr;
                inspectorArray->pushValue(WTFMove(elementValue));
            }
            return WTFMove(inspectorArray);
        }
        Ref<InspectorObject> inspectorObject = InspectorObject::create();
        JSObject* object = value.getObject();
        PropertyNameArray propertyNames(scriptState, PropertyNameMode::Strings);
        object->methodTable()->getOwnPropertyNames(object, scriptState, propertyNames, EnumerationMode());
        for (size_t i = 0; i < propertyNames.size(); i++) {
            const Identifier& name = propertyNames[i];
            JSValue propertyValue = object->get(scriptState, name);
            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue, maxDepth);
            if (!inspectorValue)
                return nullptr;
            inspectorObject->setValue(name.string(), WTFMove(inspectorValue));
        }
        return WTFMove(inspectorObject);
    }

    ASSERT_NOT_REACHED();
    return nullptr;
}

void JSCryptoKeySerializationJWK::reconcileUsages(CryptoKeyUsage& suggestedUsages) const
{
    CryptoKeyUsage jwkUsages = 0;

    JSArray* keyOps;
    if (getJSArrayFromJSON(m_exec, m_json.get(), "key_ops", keyOps)) {
        for (size_t i = 0; i < keyOps->length(); ++i) {
            JSValue jsValue = keyOps->getIndex(m_exec, i);
            String operation;
            if (!jsValue.getString(m_exec, operation)) {
                if (!m_exec->hadException())
                    throwTypeError(m_exec, "JWK key_ops attribute could not be processed");
                return;
            }
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("sign"), CryptoKeyUsageSign))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("verify"), CryptoKeyUsageVerify))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("encrypt"), CryptoKeyUsageEncrypt))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("decrypt"), CryptoKeyUsageDecrypt))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("wrapKey"), CryptoKeyUsageWrapKey))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("unwrapKey"), CryptoKeyUsageUnwrapKey))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("deriveKey"), CryptoKeyUsageDeriveKey))
                return;
            if (!tryJWKKeyOpsValue(m_exec, jwkUsages, operation, ASCIILiteral("deriveBits"), CryptoKeyUsageDeriveBits))
                return;
        }
    } else {
        if (m_exec->hadException())
            return;

        String jwkUseString;
        if (!getStringFromJSON(m_exec, m_json.get(), "use", jwkUseString)) {
            // We have neither key_ops nor use.
            return;
        }

        if (jwkUseString == "enc")
            jwkUsages |= (CryptoKeyUsageEncrypt | CryptoKeyUsageDecrypt | CryptoKeyUsageWrapKey | CryptoKeyUsageUnwrapKey);
        else if (jwkUseString == "sig")
            jwkUsages |= (CryptoKeyUsageSign | CryptoKeyUsageVerify);
        else {
            throwTypeError(m_exec, "Unsupported JWK key use value \"" + jwkUseString + "\"");
            return;
        }
    }

    suggestedUsages = suggestedUsages & jwkUsages;
}

static PassRefPtr<InspectorValue> jsToInspectorValue(ScriptState* scriptState, JSValue value, int maxDepth)
{
    if (!value) {
        ASSERT_NOT_REACHED();
        return 0;
    }

    if (!maxDepth)
        return 0;
    maxDepth--;

    if (value.isNull() || value.isUndefined())
        return InspectorValue::null();
    if (value.isBoolean())
        return InspectorBasicValue::create(value.asBoolean());
    if (value.isNumber())
        return InspectorBasicValue::create(value.asNumber());
    if (value.isString()) {
        String s = value.getString(scriptState);
        return InspectorString::create(String(s.characters(), s.length()));
    }
    if (value.isObject()) {
        if (isJSArray(value)) {
            RefPtr<InspectorArray> inspectorArray = InspectorArray::create();
            JSArray* array = asArray(value);
            unsigned length = array->length();
            for (unsigned i = 0; i < length; i++) {
                JSValue element = array->getIndex(scriptState, i);
                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element, maxDepth);
                if (!elementValue)
                    return 0;
                inspectorArray->pushValue(elementValue);
            }
            return inspectorArray;
        }
        RefPtr<InspectorObject> inspectorObject = InspectorObject::create();
        JSObject* object = value.getObject();
        PropertyNameArray propertyNames(scriptState);
        object->methodTable()->getOwnPropertyNames(object, scriptState, propertyNames, ExcludeDontEnumProperties);
        for (size_t i = 0; i < propertyNames.size(); i++) {
            const Identifier& name =  propertyNames[i];
            JSValue propertyValue = object->get(scriptState, name);
            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue, maxDepth);
            if (!inspectorValue)
                return 0;
            inspectorObject->setValue(String(name.characters(), name.length()), inspectorValue);
        }
        return inspectorObject;
    }
    ASSERT_NOT_REACHED();
    return 0;
}

static PassRefPtr<InspectorValue> jsToInspectorValue(ScriptState* scriptState, JSValue value)
{
    if (!value) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    if (value.isNull() || value.isUndefined())
        return InspectorValue::null();
    if (value.isBoolean())
        return InspectorBasicValue::create(value.getBoolean());
    if (value.isNumber())
        return InspectorBasicValue::create(value.uncheckedGetNumber());
    if (value.isString()) {
        UString s = value.getString(scriptState);
        return InspectorString::create(String(s.characters(), s.length()));
    }
    if (value.isObject()) {
        if (isJSArray(&scriptState->globalData(), value)) {
            RefPtr<InspectorArray> inspectorArray = InspectorArray::create();
            JSArray* array = asArray(value);
            unsigned length = array->length();
            for (unsigned i = 0; i < length; i++) {
                JSValue element = array->getIndex(i);
                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element);
                if (!elementValue) {
                    ASSERT_NOT_REACHED();
                    elementValue = InspectorValue::null();
                }
                inspectorArray->pushValue(elementValue);
            }
            return inspectorArray;
        }
        RefPtr<InspectorObject> inspectorObject = InspectorObject::create();
        JSObject* object = value.getObject();
        PropertyNameArray propertyNames(scriptState);
        object->getOwnPropertyNames(scriptState, propertyNames);
        for (size_t i = 0; i < propertyNames.size(); i++) {
            const Identifier& name =  propertyNames[i];
            JSValue propertyValue = object->get(scriptState, name);
            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue);
            if (!inspectorValue) {
                ASSERT_NOT_REACHED();
                inspectorValue = InspectorValue::null();
            }
            inspectorObject->setValue(String(name.characters(), name.length()), inspectorValue);
        }
        return inspectorObject;
    }
    ASSERT_NOT_REACHED();
    return 0;
}

PassRefPtr<DOMStringList> toDOMStringList(ExecState* exec, JSValue value)
{
    if (value.inherits(&JSDOMStringList::s_info))
        return jsCast<JSDOMStringList*>(asObject(value))->impl();

    if (!isJSArray(value))
        return 0;

    JSArray* array = asArray(value);
    RefPtr<DOMStringList> stringList = DOMStringList::create();
    for (unsigned i = 0; i < array->length(); ++i)
        stringList->append(array->getIndex(exec, i).toString(exec)->value(exec));

    return stringList.release();
}

void JSInternals::setUserPreferredLanguages(ExecState* exec, JSValue value)
{
    if (!isJSArray(value)) {
        throwError(exec, createSyntaxError(exec, "setUserPreferredLanguages: Expected Array"));
        return;
    }
    
    Vector<String> languages;
    JSArray* array = asArray(value);
    for (unsigned i = 0; i < array->length(); ++i) {
        String language = ustringToString(array->getIndex(i).toString(exec)->value(exec));
        languages.append(language);
    }
    
    Internals* imp = static_cast<Internals*>(impl());
    imp->setUserPreferredLanguages(languages);
}

void JSCanvasRenderingContext2D::setWebkitLineDash(ExecState* exec, JSValue value)
{
    if (!isJSArray(value))
        return;

    Vector<float> dash;
    JSArray* valueArray = asArray(value);
    for (unsigned i = 0; i < valueArray->length(); ++i) {
        float elem = valueArray->getIndex(exec, i).toFloat(exec);
        if (elem <= 0 || !std::isfinite(elem))
            return;

        dash.append(elem);
    }

    CanvasRenderingContext2D* context = static_cast<CanvasRenderingContext2D*>(impl());
    context->setWebkitLineDash(dash);
}

EncodedJSValue JSC_HOST_CALL boundFunctionConstruct(ExecState* exec)
{
    JSBoundFunction* boundFunction = jsCast<JSBoundFunction*>(exec->callee());

    ASSERT(isJSArray(boundFunction->boundArgs())); // Currently this is true!
    JSArray* boundArgs = asArray(boundFunction->boundArgs());

    MarkedArgumentBuffer args;
    for (unsigned i = 0; i < boundArgs->length(); ++i)
        args.append(boundArgs->getIndex(i));
    for (unsigned i = 0; i < exec->argumentCount(); ++i)
        args.append(exec->argument(i));

    JSObject* targetFunction = boundFunction->targetFunction();
    ConstructData constructData;
    ConstructType constructType = getConstructData(targetFunction, constructData);
    ASSERT(constructType != ConstructTypeNone);
    return JSValue::encode(construct(exec, targetFunction, constructType, constructData, args));
}

JSValue JSInspectorFrontendHost::showContextMenu(ExecState* exec)
{
    if (exec->argumentCount() < 2)
        return jsUndefined();
#if ENABLE(CONTEXT_MENUS)
    Event* event = toEvent(exec->argument(0));

    JSArray* array = asArray(exec->argument(1));
    Vector<ContextMenuItem*> items;

    for (size_t i = 0; i < array->length(); ++i) {
        JSObject* item = asObject(array->getIndex(i));
        JSValue label = item->get(exec, Identifier(exec, "label"));
        JSValue type = item->get(exec, Identifier(exec, "type"));
        JSValue id = item->get(exec, Identifier(exec, "id"));
        JSValue enabled = item->get(exec, Identifier(exec, "enabled"));
        JSValue checked = item->get(exec, Identifier(exec, "checked"));
        if (!type.isString())
            continue;

        String typeString = ustringToString(type.toString(exec)->value(exec));
        if (typeString == "separator") {
            items.append(new ContextMenuItem(SeparatorType,
                                             ContextMenuItemCustomTagNoAction,
                                             String()));
        } else {
            ContextMenuAction typedId = static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + id.toInt32(exec));
            ContextMenuItem* menuItem = new ContextMenuItem((typeString == "checkbox" ? CheckableActionType : ActionType), typedId, ustringToString(label.toString(exec)->value(exec)));
            if (!enabled.isUndefined())
                menuItem->setEnabled(enabled.toBoolean(exec));
            if (!checked.isUndefined())
                menuItem->setChecked(checked.toBoolean(exec));
            items.append(menuItem);
        }
    }

    impl()->showContextMenu(event, items);
#endif
    return jsUndefined();
}

EncodedJSValue JSC_HOST_CALL JSWebSocketConstructor::constructJSWebSocket(ExecState* exec)
{
    JSWebSocketConstructor* jsConstructor = static_cast<JSWebSocketConstructor*>(exec->callee());
    ScriptExecutionContext* context = jsConstructor->scriptExecutionContext();
    if (!context)
        return throwVMError(exec, createReferenceError(exec, "WebSocket constructor associated document is unavailable"));

    if (!exec->argumentCount())
        return throwVMError(exec, createSyntaxError(exec, "Not enough arguments"));

    String urlString = ustringToString(exec->argument(0).toString(exec)->value(exec));
    if (exec->hadException())
        return throwVMError(exec, createSyntaxError(exec, "wrong URL"));
    RefPtr<WebSocket> webSocket = WebSocket::create(context);
    ExceptionCode ec = 0;
    if (exec->argumentCount() < 2)
        webSocket->connect(urlString, ec);
    else {
        JSValue protocolsValue = exec->argument(1);
        if (isJSArray(protocolsValue)) {
            Vector<String> protocols;
            JSArray* protocolsArray = asArray(protocolsValue);
            for (unsigned i = 0; i < protocolsArray->length(); ++i) {
                String protocol = ustringToString(protocolsArray->getIndex(i).toString(exec)->value(exec));
                if (exec->hadException())
                    return JSValue::encode(JSValue());
                protocols.append(protocol);
            }
            webSocket->connect(urlString, protocols, ec);
        } else {
            String protocol = ustringToString(protocolsValue.toString(exec)->value(exec));
            if (exec->hadException())
                return JSValue::encode(JSValue());
            webSocket->connect(urlString, protocol, ec);
        }
    }
    setDOMException(exec, ec);
    return JSValue::encode(CREATE_DOM_WRAPPER(exec, jsConstructor->globalObject(), WebSocket, webSocket.get()));
}

static RefPtr<IDBKey> createIDBKeyFromValue(ExecState* exec, JSValue value, Vector<JSArray*>& stack)
{
    if (value.isNumber() && !std::isnan(value.toNumber(exec)))
        return IDBKey::createNumber(value.toNumber(exec));
    if (value.isString())
        return IDBKey::createString(value.toString(exec)->value(exec));
    if (value.inherits(DateInstance::info()) && !std::isnan(valueToDate(exec, value)))
        return IDBKey::createDate(valueToDate(exec, value));
    if (value.isObject()) {
        JSObject* object = asObject(value);
        if (isJSArray(object) || object->inherits(JSArray::info())) {
            JSArray* array = asArray(object);
            size_t length = array->length();

            if (stack.contains(array))
                return nullptr;
            if (stack.size() >= maximumDepth)
                return nullptr;
            stack.append(array);

            Vector<RefPtr<IDBKey>> subkeys;
            for (size_t i = 0; i < length; i++) {
                JSValue item = array->getIndex(exec, i);
                RefPtr<IDBKey> subkey = createIDBKeyFromValue(exec, item, stack);
                if (!subkey)
                    subkeys.append(IDBKey::createInvalid());
                else
                    subkeys.append(subkey);
            }

            stack.removeLast();
            return IDBKey::createArray(subkeys);
        }
    }
    return nullptr;
}

static bool cryptoKeyUsagesFromJSValue(ExecState& state, JSValue value, CryptoKeyUsageBitmap& result)
{
    VM& vm = state.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    if (!isJSArray(value)) {
        throwTypeError(&state, scope);
        return false;
    }

    result = 0;

    JSArray* array = asArray(value);
    for (size_t i = 0; i < array->length(); ++i) {
        JSValue element = array->getIndex(&state, i);
        String usageString = element.toString(&state)->value(&state);
        RETURN_IF_EXCEPTION(scope, false);
        if (usageString == "encrypt")
            result |= CryptoKeyUsageEncrypt;
        else if (usageString == "decrypt")
            result |= CryptoKeyUsageDecrypt;
        else if (usageString == "sign")
            result |= CryptoKeyUsageSign;
        else if (usageString == "verify")
            result |= CryptoKeyUsageVerify;
        else if (usageString == "deriveKey")
            result |= CryptoKeyUsageDeriveKey;
        else if (usageString == "deriveBits")
            result |= CryptoKeyUsageDeriveBits;
        else if (usageString == "wrapKey")
            result |= CryptoKeyUsageWrapKey;
        else if (usageString == "unwrapKey")
            result |= CryptoKeyUsageUnwrapKey;
    }
    return true;
}