| /* |
| * Copyright (C) 2007 Henry Mason (hmason@mac.com) |
| * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "third_party/blink/renderer/core/events/message_event.h" |
| |
| #include <memory> |
| |
| #include "third_party/blink/renderer/bindings/core/v8/v8_array_buffer.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_message_event_init.h" |
| #include "third_party/blink/renderer/core/event_interface_names.h" |
| #include "third_party/blink/renderer/core/frame/user_activation.h" |
| #include "third_party/blink/renderer/core/html/portal/html_portal_element.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| |
| namespace blink { |
| |
| // extern |
| const V8PrivateProperty::SymbolKey kPrivatePropertyMessageEventCachedData; |
| |
| static inline bool IsValidSource(EventTarget* source) { |
| return !source || source->ToDOMWindow() || source->ToMessagePort() || |
| source->ToServiceWorker() || source->ToPortalHost() || |
| IsA<HTMLPortalElement>(source->ToNode()); |
| } |
| |
| size_t MessageEvent::SizeOfExternalMemoryInBytes() { |
| switch (data_type_) { |
| case kDataTypeNull: |
| return 0; |
| case kDataTypeScriptValue: |
| // This is not external memory. |
| return 0; |
| case kDataTypeSerializedScriptValue: { |
| size_t result = 0; |
| for (auto const& array_buffer : |
| data_as_serialized_script_value_->ArrayBuffers()) { |
| result += array_buffer->ByteLengthAsSizeT(); |
| } |
| |
| return result; |
| } |
| case kDataTypeString: |
| return data_as_string_.length(); |
| case kDataTypeBlob: |
| return static_cast<size_t>(data_as_blob_->size()); |
| case kDataTypeArrayBuffer: |
| return data_as_array_buffer_->ByteLengthAsSizeT(); |
| } |
| } |
| |
| void MessageEvent::RegisterAmountOfExternallyAllocatedMemory() { |
| CHECK_EQ(amount_of_external_memory_, 0u); |
| size_t size = SizeOfExternalMemoryInBytes(); |
| |
| v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory( |
| static_cast<int64_t>(size)); |
| amount_of_external_memory_ = size; |
| } |
| |
| void MessageEvent::UnregisterAmountOfExternallyAllocatedMemory() { |
| if (amount_of_external_memory_ > 0) { |
| v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory( |
| -static_cast<int64_t>(amount_of_external_memory_)); |
| amount_of_external_memory_ = 0; |
| } |
| } |
| |
| MessageEvent::MessageEvent() : data_type_(kDataTypeScriptValue) {} |
| |
| MessageEvent::MessageEvent(const AtomicString& type, |
| const MessageEventInit* initializer) |
| : Event(type, initializer), |
| data_type_(kDataTypeScriptValue), |
| source_(nullptr) { |
| // TODO(crbug.com/1070964): Remove this existence check. There is a bug that |
| // the current code generator does not initialize a ScriptValue with the |
| // v8::Null value despite that the dictionary member has the default value of |
| // IDL null. |hasData| guard is necessary here. |
| if (initializer->hasData()) { |
| v8::Local<v8::Value> data = initializer->data().V8Value(); |
| // TODO(crbug.com/1070871): Remove the following IsNullOrUndefined() check. |
| // This null/undefined check fills the gap between the new and old bindings |
| // code. The new behavior is preferred in a long term, and we'll switch to |
| // the new behavior once the migration to the new bindings gets settled. |
| if (!data->IsNullOrUndefined()) { |
| data_as_v8_value_.Set(initializer->data().GetIsolate(), data); |
| } |
| } |
| if (initializer->hasOrigin()) |
| origin_ = initializer->origin(); |
| if (initializer->hasLastEventId()) |
| last_event_id_ = initializer->lastEventId(); |
| if (initializer->hasSource() && IsValidSource(initializer->source())) |
| source_ = initializer->source(); |
| if (initializer->hasPorts()) |
| ports_ = MakeGarbageCollected<MessagePortArray>(initializer->ports()); |
| if (initializer->hasUserActivation()) |
| user_activation_ = initializer->userActivation(); |
| DCHECK(IsValidSource(source_.Get())); |
| } |
| |
| MessageEvent::MessageEvent(const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| MessagePortArray* ports) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeScriptValue), |
| origin_(origin), |
| last_event_id_(last_event_id), |
| source_(source), |
| ports_(ports) { |
| DCHECK(IsValidSource(source_.Get())); |
| } |
| |
| MessageEvent::MessageEvent(scoped_refptr<SerializedScriptValue> data, |
| const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| MessagePortArray* ports, |
| UserActivation* user_activation) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeSerializedScriptValue), |
| data_as_serialized_script_value_( |
| SerializedScriptValue::Unpack(std::move(data))), |
| origin_(origin), |
| last_event_id_(last_event_id), |
| source_(source), |
| ports_(ports), |
| user_activation_(user_activation) { |
| DCHECK(IsValidSource(source_.Get())); |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent::MessageEvent(scoped_refptr<SerializedScriptValue> data, |
| const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| Vector<MessagePortChannel> channels, |
| UserActivation* user_activation) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeSerializedScriptValue), |
| data_as_serialized_script_value_( |
| SerializedScriptValue::Unpack(std::move(data))), |
| origin_(origin), |
| last_event_id_(last_event_id), |
| source_(source), |
| channels_(std::move(channels)), |
| user_activation_(user_activation) { |
| DCHECK(IsValidSource(source_.Get())); |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent::MessageEvent(const String& origin, EventTarget* source) |
| : Event(event_type_names::kMessageerror, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeNull), |
| origin_(origin), |
| source_(source) { |
| DCHECK(IsValidSource(source_.Get())); |
| } |
| |
| MessageEvent::MessageEvent(const String& data, const String& origin) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeString), |
| data_as_string_(data), |
| origin_(origin) { |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent::MessageEvent(Blob* data, const String& origin) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeBlob), |
| data_as_blob_(data), |
| origin_(origin) { |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent::MessageEvent(DOMArrayBuffer* data, const String& origin) |
| : Event(event_type_names::kMessage, Bubbles::kNo, Cancelable::kNo), |
| data_type_(kDataTypeArrayBuffer), |
| data_as_array_buffer_(data), |
| origin_(origin) { |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent::~MessageEvent() { |
| UnregisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| MessageEvent* MessageEvent::Create(const AtomicString& type, |
| const MessageEventInit* initializer, |
| ExceptionState& exception_state) { |
| if (initializer->source() && !IsValidSource(initializer->source())) { |
| exception_state.ThrowTypeError( |
| "The optional 'source' property is neither a Window nor MessagePort."); |
| return nullptr; |
| } |
| return MakeGarbageCollected<MessageEvent>(type, initializer); |
| } |
| |
| void MessageEvent::initMessageEvent(const AtomicString& type, |
| bool bubbles, |
| bool cancelable, |
| const ScriptValue& data, |
| const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| MessagePortArray& ports) { |
| if (IsBeingDispatched()) |
| return; |
| |
| initEvent(type, bubbles, cancelable); |
| |
| data_type_ = kDataTypeScriptValue; |
| data_as_v8_value_.Set(data.GetIsolate(), data.V8Value()); |
| is_data_dirty_ = true; |
| origin_ = origin; |
| last_event_id_ = last_event_id; |
| source_ = source; |
| if (ports.IsEmpty()) { |
| ports_ = nullptr; |
| } else { |
| ports_ = MakeGarbageCollected<MessagePortArray>(); |
| swap(*ports_, ports); |
| } |
| is_ports_dirty_ = true; |
| } |
| |
| void MessageEvent::initMessageEvent(const AtomicString& type, |
| bool bubbles, |
| bool cancelable, |
| scoped_refptr<SerializedScriptValue> data, |
| const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| MessagePortArray* ports, |
| UserActivation* user_activation) { |
| if (IsBeingDispatched()) |
| return; |
| |
| initEvent(type, bubbles, cancelable); |
| |
| data_type_ = kDataTypeSerializedScriptValue; |
| data_as_serialized_script_value_ = |
| SerializedScriptValue::Unpack(std::move(data)); |
| is_data_dirty_ = true; |
| origin_ = origin; |
| last_event_id_ = last_event_id; |
| source_ = source; |
| ports_ = ports; |
| is_ports_dirty_ = true; |
| user_activation_ = user_activation; |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| void MessageEvent::initMessageEvent(const AtomicString& type, |
| bool bubbles, |
| bool cancelable, |
| const String& data, |
| const String& origin, |
| const String& last_event_id, |
| EventTarget* source, |
| MessagePortArray* ports) { |
| if (IsBeingDispatched()) |
| return; |
| |
| initEvent(type, bubbles, cancelable); |
| |
| data_type_ = kDataTypeString; |
| data_as_string_ = data; |
| is_data_dirty_ = true; |
| origin_ = origin; |
| last_event_id_ = last_event_id; |
| source_ = source; |
| ports_ = ports; |
| is_ports_dirty_ = true; |
| RegisterAmountOfExternallyAllocatedMemory(); |
| } |
| |
| ScriptValue MessageEvent::data(ScriptState* script_state) { |
| is_data_dirty_ = false; |
| |
| v8::Isolate* isolate = script_state->GetIsolate(); |
| v8::Local<v8::Value> value; |
| switch (data_type_) { |
| case kDataTypeNull: |
| value = v8::Null(isolate); |
| break; |
| |
| case kDataTypeScriptValue: |
| if (data_as_v8_value_.IsEmpty()) |
| value = v8::Null(isolate); |
| else |
| value = data_as_v8_value_.GetAcrossWorld(script_state); |
| break; |
| |
| case MessageEvent::kDataTypeSerializedScriptValue: |
| if (data_as_serialized_script_value_) { |
| // The data is put on the V8 GC heap here, and therefore the V8 GC does |
| // the accounting from here on. We unregister the registered memory to |
| // avoid double accounting. |
| UnregisterAmountOfExternallyAllocatedMemory(); |
| MessagePortArray message_ports = ports(); |
| SerializedScriptValue::DeserializeOptions options; |
| options.message_ports = &message_ports; |
| value = data_as_serialized_script_value_->Deserialize(isolate, options); |
| } else { |
| value = v8::Null(isolate); |
| } |
| break; |
| |
| case MessageEvent::kDataTypeString: |
| value = V8String(isolate, data_as_string_); |
| break; |
| |
| case MessageEvent::kDataTypeBlob: |
| value = ToV8(data_as_blob_, script_state); |
| break; |
| |
| case MessageEvent::kDataTypeArrayBuffer: |
| value = ToV8(data_as_array_buffer_, script_state); |
| break; |
| } |
| |
| return ScriptValue(isolate, value); |
| } |
| |
| const AtomicString& MessageEvent::InterfaceName() const { |
| return event_interface_names::kMessageEvent; |
| } |
| |
| MessagePortArray MessageEvent::ports() { |
| // TODO(bashi): Currently we return a copied array because the binding |
| // layer could modify the content of the array while executing JS callbacks. |
| // Avoid copying once we can make sure that the binding layer won't |
| // modify the content. |
| is_ports_dirty_ = false; |
| return ports_ ? *ports_ : MessagePortArray(); |
| } |
| |
| bool MessageEvent::IsOriginCheckRequiredToAccessData() const { |
| if (data_type_ != kDataTypeSerializedScriptValue) { |
| return false; |
| } |
| return data_as_serialized_script_value_->Value()->IsOriginCheckRequired(); |
| } |
| |
| bool MessageEvent::IsLockedToAgentCluster() const { |
| if (locked_to_agent_cluster_) |
| return true; |
| if (data_type_ != kDataTypeSerializedScriptValue) { |
| return false; |
| } |
| return data_as_serialized_script_value_->Value()->IsLockedToAgentCluster(); |
| } |
| |
| void MessageEvent::EntangleMessagePorts(ExecutionContext* context) { |
| ports_ = MessagePort::EntanglePorts(*context, std::move(channels_)); |
| is_ports_dirty_ = true; |
| } |
| |
| void MessageEvent::Trace(Visitor* visitor) const { |
| visitor->Trace(data_as_v8_value_); |
| visitor->Trace(data_as_serialized_script_value_); |
| visitor->Trace(data_as_blob_); |
| visitor->Trace(data_as_array_buffer_); |
| visitor->Trace(source_); |
| visitor->Trace(ports_); |
| visitor->Trace(user_activation_); |
| Event::Trace(visitor); |
| } |
| |
| void MessageEvent::LockToAgentCluster() { |
| locked_to_agent_cluster_ = true; |
| } |
| |
| v8::Local<v8::Object> MessageEvent::AssociateWithWrapper( |
| v8::Isolate* isolate, |
| const WrapperTypeInfo* wrapper_type, |
| v8::Local<v8::Object> wrapper) { |
| wrapper = Event::AssociateWithWrapper(isolate, wrapper_type, wrapper); |
| |
| // Let V8 know the memory usage of the platform object, especially of |data| |
| // IDL attribute which could consume huge memory, so that V8 can best schedule |
| // GCs. |
| switch (data_type_) { |
| case kDataTypeNull: |
| // V8 is already aware of memory usage of ScriptValue. |
| case kDataTypeScriptValue: |
| case kDataTypeSerializedScriptValue: |
| break; |
| case kDataTypeString: |
| V8PrivateProperty::GetSymbol(isolate, |
| kPrivatePropertyMessageEventCachedData) |
| .Set(wrapper, V8String(isolate, data_as_string_)); |
| break; |
| case kDataTypeBlob: |
| break; |
| case kDataTypeArrayBuffer: |
| V8PrivateProperty::GetSymbol(isolate, |
| kPrivatePropertyMessageEventCachedData) |
| .Set(wrapper, ToV8(data_as_array_buffer_, wrapper, isolate)); |
| break; |
| } |
| |
| return wrapper; |
| } |
| |
| } // namespace blink |
