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AnimationCollection.h (2320B)

      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
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_AnimationCollection_h
      8 #define mozilla_AnimationCollection_h
      9 
     10 #include "mozilla/LinkedList.h"
     11 #include "mozilla/PseudoStyleType.h"
     12 #include "mozilla/RefPtr.h"
     13 #include "nsCSSPseudoElements.h"
     14 #include "nsTArrayForwardDeclare.h"
     15 
     16 class nsAtom;
     17 class nsIFrame;
     18 class nsPresContext;
     19 
     20 namespace mozilla {
     21 namespace dom {
     22 class Element;
     23 }
     24 
     25 template <class AnimationType>
     26 class AnimationCollection
     27    : public LinkedListElement<AnimationCollection<AnimationType>> {
     28  typedef AnimationCollection<AnimationType> SelfType;
     29 
     30 public:
     31  AnimationCollection(dom::Element& aOwner,
     32                      const PseudoStyleRequest& aPseudoRequest)
     33      : mElement(aOwner), mPseudo(aPseudoRequest) {
     34    MOZ_COUNT_CTOR(AnimationCollection);
     35  }
     36 
     37  ~AnimationCollection();
     38 
     39  void Destroy();
     40 
     41  // Given the frame |aFrame| with possibly animated content, finds its
     42  // associated collection of animations. If |aFrame| is a generated content
     43  // frame, this function may examine the parent frame to search for such
     44  // animations.
     45  static AnimationCollection* Get(const nsIFrame* aFrame);
     46  static AnimationCollection* Get(const dom::Element* aElement,
     47                                  const PseudoStyleRequest& aPseudoRequest);
     48 
     49  // The element. Weak reference is fine since it owns us.
     50  // FIXME(emilio): These are only needed for Destroy(), so maybe remove and
     51  // rely on the caller clearing us properly?
     52  dom::Element& mElement;
     53  const PseudoStyleRequest mPseudo;
     54 
     55  nsTArray<RefPtr<AnimationType>> mAnimations;
     56 
     57 private:
     58  // We distinguish between destroying this by calling Destroy() vs directly
     59  // clearing the collection.
     60  //
     61  // The former case represents regular updating due to style changes and should
     62  // trigger subsequent restyles.
     63  //
     64  // The latter case represents document tear-down or other DOM surgery in
     65  // which case we should not trigger restyles.
     66  bool mCalledDestroy = false;
     67 };
     68 
     69 }  // namespace mozilla
     70 
     71 #endif  // mozilla_AnimationCollection_h