chromium/src/third_party/blink/renderer/core/dom/events/registered_event_listener.cc

/*
 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
 * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
 * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights
 * reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "third_party/blink/renderer/core/dom/events/registered_event_listener.h"

#include "third_party/blink/renderer/core/dom/events/add_event_listener_options_resolved.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/dom/events/event_listener.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"

namespace blink {

RegisteredEventListener::RegisteredEventListener()
    : use_capture_(false),
      passive_(false),
      once_(false),
      blocked_event_warning_emitted_(false),
      passive_forced_for_document_target_(false),
      passive_specified_(false) {}

RegisteredEventListener::RegisteredEventListener(
    EventListener* listener,
    const AddEventListenerOptionsResolved* options)
    : callback_(listener),
      use_capture_(options->capture()),
      passive_(options->passive()),
      once_(options->once()),
      blocked_event_warning_emitted_(false),
      passive_forced_for_document_target_(
          options->PassiveForcedForDocumentTarget()),
      passive_specified_(options->PassiveSpecified()) {}

RegisteredEventListener& RegisteredEventListener::operator=(
    const RegisteredEventListener& that) = default;

void RegisteredEventListener::Trace(Visitor* visitor) const {
  visitor->Trace(callback_);
}

AddEventListenerOptionsResolved* RegisteredEventListener::Options() const {
  auto* result = MakeGarbageCollected<AddEventListenerOptionsResolved>();
  result->setCapture(use_capture_);
  result->setPassive(passive_);
  result->SetPassiveForcedForDocumentTarget(
      passive_forced_for_document_target_);
  result->setOnce(once_);
  result->SetPassiveSpecified(passive_specified_);
  return result;
}

void RegisteredEventListener::SetCallback(EventListener* listener) {
  callback_ = listener;
}

bool RegisteredEventListener::Matches(
    const EventListener* listener,
    const EventListenerOptions* options) const {
  // Equality is soley based on the listener and useCapture flags.
  DCHECK(callback_);
  DCHECK(listener);
  return callback_->Matches(*listener) &&
         static_cast<bool>(use_capture_) == options->capture();
}

bool RegisteredEventListener::ShouldFire(const Event& event) const {
  if (event.FireOnlyCaptureListenersAtTarget()) {
    DCHECK_EQ(event.eventPhase(), Event::kAtTarget);
    return Capture();
  }
  if (event.FireOnlyNonCaptureListenersAtTarget()) {
    DCHECK_EQ(event.eventPhase(), Event::kAtTarget);
    return !Capture();
  }
  if (event.eventPhase() == Event::kCapturingPhase)
    return Capture();
  if (event.eventPhase() == Event::kBubblingPhase)
    return !Capture();
  return true;
}

bool operator==(const RegisteredEventListener& lhs,
                const RegisteredEventListener& rhs) {
  DCHECK(lhs.Callback());
  DCHECK(rhs.Callback());
  return lhs.Callback()->Matches(*rhs.Callback()) &&
         lhs.Capture() == rhs.Capture();
}

}  // namespace blink