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// Copyright 2016 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.
#include "modules/compositorworker/WindowAnimationWorklet.h"
#include "core/dom/Document.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "modules/compositorworker/AnimationWorklet.h"
namespace blink {
WindowAnimationWorklet::WindowAnimationWorklet(LocalDOMWindow& window)
: ContextLifecycleObserver(window.frame()->document()) {}
const char* WindowAnimationWorklet::supplementName() {
return "WindowAnimationWorklet";
}
// static
WindowAnimationWorklet& WindowAnimationWorklet::from(LocalDOMWindow& window) {
WindowAnimationWorklet* supplement = static_cast<WindowAnimationWorklet*>(
Supplement<LocalDOMWindow>::from(window, supplementName()));
if (!supplement) {
supplement = new WindowAnimationWorklet(window);
provideTo(window, supplementName(), supplement);
}
return *supplement;
}
// static
Worklet* WindowAnimationWorklet::animationWorklet(DOMWindow& window) {
if (!window.frame())
return nullptr;
return from(toLocalDOMWindow(window))
.animationWorklet(toLocalDOMWindow(window));
}
AnimationWorklet* WindowAnimationWorklet::animationWorklet(
LocalDOMWindow& window) {
if (!m_animationWorklet && getExecutionContext()) {
DCHECK(window.frame());
m_animationWorklet = AnimationWorklet::create(window.frame());
}
return m_animationWorklet.get();
}
// Break the following cycle when the context gets detached.
// Otherwise, the worklet object will leak.
//
// window => window.animationWorklet
// => WindowAnimationWorklet
// => AnimationWorklet <--- break this reference
// => ThreadedWorkletMessagingProxy
// => Document
// => ... => window
void WindowAnimationWorklet::contextDestroyed(ExecutionContext*) {
m_animationWorklet = nullptr;
}
DEFINE_TRACE(WindowAnimationWorklet) {
visitor->trace(m_animationWorklet);
Supplement<LocalDOMWindow>::trace(visitor);
ContextLifecycleObserver::trace(visitor);
}
} // namespace blink
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