layout/style/nsTransitionManager.h

   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 /* Code to start and animate CSS transitions. */
   8
   9 #ifndef nsTransitionManager_h_
  10 #define nsTransitionManager_h_
  11
  12 #include "mozilla/dom/CSSTransition.h"
  13 #include "AnimationCommon.h"
  14 #include "nsISupportsImpl.h"
  15
  16 class nsPresContext;
  17 class nsCSSPropertyIDSet;
  18
  19 namespace mozilla {
  20 class ComputedStyle;
  21 enum class PseudoStyleType : uint8_t;
  22 }  // namespace mozilla
  23
  24 class nsTransitionManager final
  25     : public mozilla::CommonAnimationManager<mozilla::dom::CSSTransition> {
  26  public:
  27   explicit nsTransitionManager(nsPresContext* aPresContext)
  28       : mozilla::CommonAnimationManager<mozilla::dom::CSSTransition>(
  29             aPresContext) {}
  30
  31   ~nsTransitionManager() final = default;
  32
  33   typedef mozilla::AnimationCollection<mozilla::dom::CSSTransition>
  34       CSSTransitionCollection;
  35
  36   /**
  37    * Update transitions for stylo.
  38    */
  39   bool UpdateTransitions(mozilla::dom::Element* aElement,
  40                          mozilla::PseudoStyleType aPseudoType,
  41                          const mozilla::ComputedStyle& aOldStyle,
  42                          const mozilla::ComputedStyle& aNewStyle);
  43
  44  protected:
  45   typedef nsTArray<RefPtr<mozilla::dom::CSSTransition>>
  46       OwningCSSTransitionPtrArray;
  47
  48   // Update transitions. This will start new transitions,
  49   // replace existing transitions, and stop existing transitions
  50   // as needed. aDisp and aElement must be non-null.
  51   // aElementTransitions is the collection of current transitions, and it
  52   // could be a nullptr if we don't have any transitions.
  53   bool DoUpdateTransitions(const nsStyleDisplay& aDisp,
  54                            mozilla::dom::Element* aElement,
  55                            mozilla::PseudoStyleType aPseudoType,
  56                            CSSTransitionCollection*& aElementTransitions,
  57                            const mozilla::ComputedStyle& aOldStyle,
  58                            const mozilla::ComputedStyle& aNewStyle);
  59
  60   // Returns whether the transition actually started.
  61   bool ConsiderInitiatingTransition(
  62       nsCSSPropertyID aProperty, const nsStyleDisplay& aStyleDisplay,
  63       uint32_t transitionIdx, mozilla::dom::Element* aElement,
  64       mozilla::PseudoStyleType aPseudoType,
  65       CSSTransitionCollection*& aElementTransitions,
  66       const mozilla::ComputedStyle& aOldStyle,
  67       const mozilla::ComputedStyle& aNewStyle,
  68       nsCSSPropertyIDSet& aPropertiesChecked);
  69 };
  70
  71 #endif /* !defined(nsTransitionManager_h_) */