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/*
* 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, 2005, 2006, 2008 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/events/mutation_event.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/events/event_dispatcher.h"
#include "third_party/blink/renderer/core/event_interface_names.h"
#include "third_party/blink/renderer/core/events/event_util.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/web_feature.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
namespace blink {
MutationEvent::MutationEvent() : attr_change_(0) {}
MutationEvent::MutationEvent(const AtomicString& type,
Bubbles bubbles,
Cancelable cancelable,
Node* related_node,
const String& prev_value,
const String& new_value,
const String& attr_name,
uint16_t attr_change)
: Event(type, bubbles, cancelable),
related_node_(related_node),
prev_value_(prev_value),
new_value_(new_value),
attr_name_(attr_name),
attr_change_(attr_change) {}
MutationEvent::~MutationEvent() = default;
void MutationEvent::initMutationEvent(const AtomicString& type,
bool bubbles,
bool cancelable,
Node* related_node,
const String& prev_value,
const String& new_value,
const String& attr_name,
uint16_t attr_change) {
if (IsBeingDispatched())
return;
initEvent(type, bubbles, cancelable);
related_node_ = related_node;
prev_value_ = prev_value;
new_value_ = new_value;
attr_name_ = attr_name;
attr_change_ = attr_change;
}
const AtomicString& MutationEvent::InterfaceName() const {
return event_interface_names::kMutationEvent;
}
DispatchEventResult MutationEvent::DispatchEvent(EventDispatcher& dispatcher) {
Event& event = dispatcher.GetEvent();
if (event.isTrusted()) {
Document& document = dispatcher.GetNode().GetDocument();
ExecutionContext* context = document.GetExecutionContext();
// If Mutation Events are disabled, we should never dispatch trusted ones.
CHECK(document.SupportsLegacyDOMMutations());
CHECK(RuntimeEnabledFeatures::MutationEventsEnabled(context));
CHECK(!document.ShouldSuppressMutationEvents());
auto info = event_util::IsDOMMutationEventType(type());
CHECK(info.is_mutation_event);
// Only count events that have listeners:
if (document.HasListenerType(info.listener_type)) {
UseCounter::Count(context, info.event_fired_feature);
UseCounter::Count(context, WebFeature::kAnyMutationEventFired);
}
}
return Event::DispatchEvent(dispatcher);
}
void MutationEvent::Trace(Visitor* visitor) const {
visitor->Trace(related_node_);
Event::Trace(visitor);
}
} // namespace blink
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