tor-browser

The Tor Browser
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ScrollTimelineAnimationTracker.h (1664B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_ScrollTimelineAnimationTracker_h
      8 #define mozilla_ScrollTimelineAnimationTracker_h
      9 
     10 #include "mozilla/dom/Animation.h"
     11 #include "nsCycleCollectionParticipant.h"
     12 #include "nsTHashSet.h"
     13 
     14 namespace mozilla {
     15 
     16 namespace dom {
     17 class Document;
     18 }
     19 
     20 /**
     21 * Handle the pending animations which use scroll timeline while playing or
     22 * pausing.
     23 */
     24 class ScrollTimelineAnimationTracker final {
     25 public:
     26  explicit ScrollTimelineAnimationTracker(dom::Document* aDocument)
     27      : mDocument(aDocument) {}
     28 
     29  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(
     30      ScrollTimelineAnimationTracker)
     31  NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(ScrollTimelineAnimationTracker)
     32 
     33  void AddPending(dom::Animation& aAnimation) {
     34    mPendingSet.Insert(&aAnimation);
     35  }
     36 
     37  void RemovePending(dom::Animation& aAnimation) {
     38    mPendingSet.Remove(&aAnimation);
     39  }
     40 
     41  bool HasPendingAnimations() const { return mPendingSet.Count() > 0; }
     42 
     43  bool IsWaiting(const dom::Animation& aAnimation) const {
     44    return mPendingSet.Contains(const_cast<dom::Animation*>(&aAnimation));
     45  }
     46 
     47  void TriggerPendingAnimations();
     48 
     49 private:
     50  ~ScrollTimelineAnimationTracker() = default;
     51 
     52  nsTHashSet<nsRefPtrHashKey<dom::Animation>> mPendingSet;
     53  RefPtr<dom::Document> mDocument;
     54 };
     55 
     56 }  // namespace mozilla
     57 
     58 #endif  // mozilla_ScrollTimelineAnimationTracker_h