| // Copyright 2018 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_LISTENER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_LISTENER_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/js_based_event_listener.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_event_listener.h" |
| #include "third_party/blink/renderer/platform/bindings/trace_wrapper_member.h" |
| |
| namespace blink { |
| |
| // |JSEventListener| implements EventListener in the DOM standard. |
| // https://dom.spec.whatwg.org/#callbackdef-eventlistener |
| class CORE_EXPORT JSEventListener final : public JSBasedEventListener { |
| public: |
| static JSEventListener* Create(ScriptState* script_state, |
| v8::Local<v8::Object> listener, |
| const V8PrivateProperty::Symbol& property) { |
| return new JSEventListener(script_state, listener, property); |
| } |
| |
| // blink::CustomWrappable overrides: |
| void Trace(blink::Visitor*) override; |
| |
| // blink::EventListener overrides: |
| // |
| // Check the identity of |V8EventListener::callback_object_|. There can be |
| // multiple CallbackInterfaceBase objects that have the same |
| // |CallbackInterfaceBase::callback_object_| but have different |
| // |CallbackInterfaceBase::incumbent_script_state_|s. |
| bool operator==(const EventListener& other) const override { |
| if (other.GetType() != kJSEventListenerType) |
| return false; |
| return event_listener_->HasTheSameCallbackObject( |
| *static_cast<const JSEventListener*>(&other)->event_listener_); |
| } |
| |
| // blink::JSBasedEventListener overrides: |
| // TODO(crbug.com/881688): remove empty check for this method. This method |
| // should return v8::Object or v8::Null. |
| v8::Local<v8::Value> GetListenerObject(EventTarget&) override { |
| return event_listener_->CallbackObject(); |
| } |
| v8::Local<v8::Value> GetEffectiveFunction(EventTarget&) override; |
| |
| protected: |
| // blink::JSBasedEventListener overrides: |
| v8::Isolate* GetIsolate() const override { |
| return event_listener_->GetIsolate(); |
| } |
| ScriptState* GetScriptState() const override { |
| return event_listener_->CallbackRelevantScriptState(); |
| } |
| DOMWrapperWorld& GetWorld() const override { |
| return event_listener_->CallbackRelevantScriptState()->World(); |
| } |
| |
| private: |
| JSEventListener(ScriptState* script_state, |
| v8::Local<v8::Object> listener, |
| const V8PrivateProperty::Symbol& property) |
| : JSBasedEventListener(kJSEventListenerType), |
| event_listener_(V8EventListener::CreateOrNull(listener)) { |
| DCHECK(event_listener_); |
| Attach(script_state, listener, property, this); |
| } |
| |
| // blink::JSBasedEventListener override: |
| void CallListenerFunction(EventTarget&, |
| Event&, |
| v8::Local<v8::Value> js_event) override; |
| |
| const TraceWrapperMember<V8EventListener> event_listener_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_JS_EVENT_LISTENER_H_ |