| // 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 "third_party/blink/renderer/modules/animationworklet/css_animation_worklet.h" |
| |
| #include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/frame/local_dom_window.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| |
| namespace blink { |
| |
| // static |
| AnimationWorklet* CSSAnimationWorklet::animationWorklet( |
| ScriptState* script_state) { |
| LocalDOMWindow* window = ToLocalDOMWindow(script_state->GetContext()); |
| |
| if (!window->GetFrame()) |
| return nullptr; |
| return From(*window).animation_worklet_.Get(); |
| } |
| |
| // Break the following cycle when the context gets detached. |
| // Otherwise, the worklet object will leak. |
| // |
| // window => CSS.animationWorklet |
| // => CSSAnimationWorklet |
| // => AnimationWorklet <--- break this reference |
| // => ThreadedWorkletMessagingProxy |
| // => Document |
| // => ... => window |
| void CSSAnimationWorklet::ContextDestroyed(ExecutionContext*) { |
| animation_worklet_ = nullptr; |
| } |
| |
| void CSSAnimationWorklet::Trace(blink::Visitor* visitor) { |
| visitor->Trace(animation_worklet_); |
| Supplement<LocalDOMWindow>::Trace(visitor); |
| ContextLifecycleObserver::Trace(visitor); |
| } |
| |
| // static |
| CSSAnimationWorklet& CSSAnimationWorklet::From(LocalDOMWindow& window) { |
| CSSAnimationWorklet* supplement = |
| Supplement<LocalDOMWindow>::From<CSSAnimationWorklet>(window); |
| if (!supplement) { |
| supplement = MakeGarbageCollected<CSSAnimationWorklet>( |
| window.GetFrame()->GetDocument()); |
| ProvideTo(window, supplement); |
| } |
| return *supplement; |
| } |
| |
| CSSAnimationWorklet::CSSAnimationWorklet(Document* document) |
| : ContextLifecycleObserver(document), |
| animation_worklet_(MakeGarbageCollected<AnimationWorklet>(document)) { |
| DCHECK(GetExecutionContext()); |
| } |
| |
| const char CSSAnimationWorklet::kSupplementName[] = "CSSAnimationWorklet"; |
| |
| } // namespace blink |