C++ ExecState::hadException方法代码示例

static JSC::JSValue handleInitMessageEvent(JSMessageEvent* jsEvent, JSC::ExecState& state)
{
    const String& typeArg = state.argument(0).toString(&state)->value(&state);
    bool canBubbleArg = state.argument(1).toBoolean(&state);
    bool cancelableArg = state.argument(2).toBoolean(&state);
    const String originArg = valueToUSVString(&state, state.argument(4));
    const String lastEventIdArg = state.argument(5).toString(&state)->value(&state);
    DOMWindow* sourceArg = JSDOMWindow::toWrapped(state, state.argument(6));
    std::unique_ptr<MessagePortArray> messagePorts;
    std::unique_ptr<ArrayBufferArray> arrayBuffers;
    if (!state.argument(7).isUndefinedOrNull()) {
        messagePorts = std::make_unique<MessagePortArray>();
        arrayBuffers = std::make_unique<ArrayBufferArray>();
        fillMessagePortArray(state, state.argument(7), *messagePorts, *arrayBuffers);
        if (state.hadException())
            return jsUndefined();
    }
    Deprecated::ScriptValue dataArg(state.vm(), state.argument(3));
    if (state.hadException())
        return jsUndefined();

    MessageEvent& event = jsEvent->wrapped();
    event.initMessageEvent(typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, WTFMove(messagePorts));
    jsEvent->m_data.set(state.vm(), jsEvent, dataArg.jsValue());
    return jsUndefined();
}

JSValue JSDocument::getCSSCanvasContext(JSC::ExecState& state)
{
    VM& vm = state.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    if (UNLIKELY(state.argumentCount() < 4))
        return throwException(&state, scope, createNotEnoughArgumentsError(&state));
    auto contextId = state.uncheckedArgument(0).toWTFString(&state);
    if (UNLIKELY(state.hadException()))
        return jsUndefined();
    auto name = state.uncheckedArgument(1).toWTFString(&state);
    if (UNLIKELY(state.hadException()))
        return jsUndefined();
    auto width = convert<int32_t>(state, state.uncheckedArgument(2), NormalConversion);
    if (UNLIKELY(state.hadException()))
        return jsUndefined();
    auto height = convert<int32_t>(state, state.uncheckedArgument(3), NormalConversion);
    if (UNLIKELY(state.hadException()))
        return jsUndefined();

    auto* context = wrapped().getCSSCanvasContext(WTFMove(contextId), WTFMove(name), WTFMove(width), WTFMove(height));
    if (!context)
        return jsNull();

#if ENABLE(WEBGL)
    if (is<WebGLRenderingContextBase>(*context))
        return toJS(&state, globalObject(), downcast<WebGLRenderingContextBase>(*context));
#endif

    return toJS(&state, globalObject(), downcast<CanvasRenderingContext2D>(*context));
}

void fillMessagePortArray(JSC::ExecState& state, JSC::JSValue value, MessagePortArray& portArray, ArrayBufferArray& arrayBuffers)
{
    // Convert from the passed-in JS array-like object to a MessagePortArray.
    // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
    if (value.isUndefinedOrNull()) {
        portArray.resize(0);
        arrayBuffers.resize(0);
        return;
    }

    // Validation of sequence types, per WebIDL spec 4.1.13.
    unsigned length = 0;
    JSObject* object = toJSSequence(state, value, length);
    if (state.hadException())
        return;

    for (unsigned i = 0 ; i < length; ++i) {
        JSValue value = object->get(&state, i);
        if (state.hadException())
            return;
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (value.isUndefinedOrNull()) {
            setDOMException(&state, INVALID_STATE_ERR);
            return;
        }

        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        if (RefPtr<MessagePort> port = JSMessagePort::toWrapped(value)) {
            // Check for duplicate ports.
            if (portArray.contains(port)) {
                setDOMException(&state, INVALID_STATE_ERR);
                return;
            }
            portArray.append(WTFMove(port));
        } else {
            if (RefPtr<ArrayBuffer> arrayBuffer = toArrayBuffer(value))
                arrayBuffers.append(WTFMove(arrayBuffer));
            else {
                throwTypeError(&state);
                return;
            }
        }
    }
}

static JSC::JSValue dataFunctionMatrix(DataFunctionMatrixToCall f, JSC::ExecState& state, WebGLRenderingContextBase& context)
{
    if (state.argumentCount() != 3)
        return state.vm().throwException(&state, createNotEnoughArgumentsError(&state));
    
    WebGLUniformLocation* location = JSWebGLUniformLocation::toWrapped(state.uncheckedArgument(0));
    if (!location && !state.uncheckedArgument(0).isUndefinedOrNull())
        return throwTypeError(&state);
    
    bool transpose = state.uncheckedArgument(1).toBoolean(&state);
    if (state.hadException())
        return jsUndefined();
    
    RefPtr<Float32Array> webGLArray = toFloat32Array(state.uncheckedArgument(2));
    
    ExceptionCode ec = 0;
    if (webGLArray) {
        switch (f) {
        case f_uniformMatrix2fv:
            context.uniformMatrix2fv(location, transpose, *webGLArray, ec);
            break;
        case f_uniformMatrix3fv:
            context.uniformMatrix3fv(location, transpose, *webGLArray, ec);
            break;
        case f_uniformMatrix4fv:
            context.uniformMatrix4fv(location, transpose, *webGLArray, ec);
            break;
        }
        
        setDOMException(&state, ec);
        return jsUndefined();
    }
    
    Vector<float, 64> array;
    if (!toVector(state, state.uncheckedArgument(2), array))
        return throwTypeError(&state);
    
    switch (f) {
    case f_uniformMatrix2fv:
        context.uniformMatrix2fv(location, transpose, array.data(), array.size(), ec);
        break;
    case f_uniformMatrix3fv:
        context.uniformMatrix3fv(location, transpose, array.data(), array.size(), ec);
        break;
    case f_uniformMatrix4fv:
        context.uniformMatrix4fv(location, transpose, array.data(), array.size(), ec);
        break;
    }
    
    setDOMException(&state, ec);
    return jsUndefined();
}

void HTMLPlugInImageElement::didAddUserAgentShadowRoot(ShadowRoot* root)
{
    HTMLPlugInElement::didAddUserAgentShadowRoot(root);
    if (displayState() >= PreparingPluginReplacement)
        return;

    Page* page = document().page();
    if (!page)
        return;

    // Reset any author styles that may apply as we only want explicit
    // styles defined in the injected user agents stylesheets to specify
    // the look-and-feel of the snapshotted plug-in overlay. 
    root->setResetStyleInheritance(true);
    
    String mimeType = loadedMimeType();

    DOMWrapperWorld& isolatedWorld = plugInImageElementIsolatedWorld();
    document().ensurePlugInsInjectedScript(isolatedWorld);

    ScriptController& scriptController = document().frame()->script();
    JSDOMGlobalObject* globalObject = JSC::jsCast<JSDOMGlobalObject*>(scriptController.globalObject(isolatedWorld));
    JSC::ExecState* exec = globalObject->globalExec();

    JSC::JSLockHolder lock(exec);

    JSC::MarkedArgumentBuffer argList;
    argList.append(toJS(exec, globalObject, root));
    argList.append(jsString(exec, titleText(page, mimeType)));
    argList.append(jsString(exec, subtitleText(page, mimeType)));
    
    // This parameter determines whether or not the snapshot overlay should always be visible over the plugin snapshot.
    // If no snapshot was found then we want the overlay to be visible.
    argList.append(JSC::jsBoolean(!m_snapshotImage));

    // It is expected the JS file provides a createOverlay(shadowRoot, title, subtitle) function.
    JSC::JSObject* overlay = globalObject->get(exec, JSC::Identifier::fromString(exec, "createOverlay")).toObject(exec);
    if (!overlay) {
        ASSERT(exec->hadException());
        exec->clearException();
        return;
    }
    JSC::CallData callData;
    JSC::CallType callType = overlay->methodTable()->getCallData(overlay, callData);
    if (callType == JSC::CallType::None)
        return;

    JSC::call(exec, overlay, callType, callData, globalObject, argList);
    exec->clearException();
}

bool toVector(JSC::ExecState& state, JSC::JSValue value, Vector<T, inlineCapacity>& vector)
{
    if (!value.isObject())
        return false;
    
    JSC::JSObject* object = asObject(value);
    int32_t length = object->get(&state, state.vm().propertyNames->length).toInt32(&state);
    
    if (!vector.tryReserveCapacity(length))
        return false;
    vector.resize(length);
    
    for (int32_t i = 0; i < length; ++i) {
        JSC::JSValue v = object->get(&state, i);
        if (state.hadException())
            return false;
        vector[i] = static_cast<T>(v.toNumber(&state));
    }
    
    return true;
}

void DragData::asFilenames(Vector<String>& result) const
{
    bool success;
    JSC::JSValue data = m_platformDragData->getData(ClipboardApolloHelper::FILE_LIST_TYPE, success);
    JSC::ExecState *exec = m_platformDragData->execState();
    if (success && data.isObject()) {
        JSC::JSObject* filenameArray = data.toObject(exec);
        uint32_t length = filenameArray->get(exec, JSC::Identifier(exec, "length")).toUInt32(exec);
        for (uint32_t i=0; i<length; i++) {
            JSC::JSValue fileValue = filenameArray->get(exec, i);
            if (fileValue.isObject()) {
                JSC::JSObject* file = fileValue.toObject(exec);
                JSC::JSValue pathValue = file->get(exec, JSC::Identifier(exec, "nativePath"));
                if (pathValue.isString()) {
                    String path = ustringToString(pathValue.toString(exec));
                    result.append(path);
                }
            }
        }
    }
    if (exec->hadException())
        exec->clearException();
}

void throwSecurityError(JSC::ExecState& state, const String& message)
{
    ASSERT(!state.hadException());
    state.vm().throwException(&state, createDOMException(&state, SECURITY_ERR));
}

RefPtr<IDBRequest> IDBObjectStore::putOrAdd(JSC::ExecState& state, JSC::JSValue value, RefPtr<IDBKey> key, IndexedDB::ObjectStoreOverwriteMode overwriteMode, InlineKeyCheck inlineKeyCheck, ExceptionCodeWithMessage& ec)
{
    LOG(IndexedDB, "IDBObjectStore::putOrAdd");

    if (!m_transaction->isActive()) {
        ec.code = IDBDatabaseException::TransactionInactiveError;
        ec.message = ASCIILiteral("Failed to store record in an IDBObjectStore: The transaction is inactive or finished.");
        return nullptr;
    }

    if (m_transaction->isReadOnly()) {
        ec.code = IDBDatabaseException::ReadOnlyError;
        ec.message = ASCIILiteral("Failed to store record in an IDBObjectStore: The transaction is read-only.");
        return nullptr;
    }

    if (m_deleted) {
        ec.code = IDBDatabaseException::InvalidStateError;
        return nullptr;
    }

    RefPtr<SerializedScriptValue> serializedValue = SerializedScriptValue::create(&state, value, nullptr, nullptr);
    if (state.hadException()) {
        ec.code = IDBDatabaseException::DataCloneError;
        ec.message = ASCIILiteral("Failed to store record in an IDBObjectStore: An object could not be cloned.");
        return nullptr;
    }

    if (serializedValue->hasBlobURLs()) {
        // FIXME: Add Blob/File/FileList support
        ec.code = IDBDatabaseException::DataCloneError;
        ec.message = ASCIILiteral("Failed to store record in an IDBObjectStore: BlobURLs are not yet supported.");
        return nullptr;
    }

    if (key && key->type() == KeyType::Invalid) {
        ec.code = IDBDatabaseException::DataError;
        return nullptr;
    }

    bool usesInlineKeys = !m_info.keyPath().isNull();
    bool usesKeyGenerator = autoIncrement();
    if (usesInlineKeys && inlineKeyCheck == InlineKeyCheck::Perform) {
        if (key) {
            ec.code = IDBDatabaseException::DataError;
            return nullptr;
        }

        RefPtr<IDBKey> keyPathKey = maybeCreateIDBKeyFromScriptValueAndKeyPath(state, value, m_info.keyPath());
        if (keyPathKey && !keyPathKey->isValid()) {
            ec.code = IDBDatabaseException::DataError;
            return nullptr;
        }

        if (!keyPathKey) {
            if (usesKeyGenerator) {
                if (!canInjectIDBKeyIntoScriptValue(state, value, m_info.keyPath())) {
                    ec.code = IDBDatabaseException::DataError;
                    return nullptr;
                }
            } else {
                ec.code = IDBDatabaseException::DataError;
                return nullptr;
            }
        }

        if (keyPathKey) {
            ASSERT(!key);
            key = keyPathKey;
        }
    } else if (!usesKeyGenerator && !key) {
        ec.code = IDBDatabaseException::DataError;
        return nullptr;
    }

    auto context = scriptExecutionContextFromExecState(&state);
    if (!context) {
        ec.code = IDBDatabaseException::UnknownError;
        return nullptr;
    }

    Ref<IDBRequest> request = m_transaction->requestPutOrAdd(*context, *this, key.get(), *serializedValue, overwriteMode);
    return adoptRef(request.leakRef());
}