layout/style/TimelineManager.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 #ifndef mozilla_TimelineManager_h
   7 #define mozilla_TimelineManager_h
   8
   9 #include "mozilla/Assertions.h"
  10 #include "mozilla/LinkedList.h"
  11 #include "mozilla/TimelineCollection.h"
  12 #include "nsStyleAutoArray.h"
  13
  14 class nsPresContext;
  15
  16 namespace mozilla {
  17 class ComputedStyle;
  18 enum class PseudoStyleType : uint8_t;
  19
  20 namespace dom {
  21 class Element;
  22 class ScrollTimeline;
  23 class ViewTimeline;
  24 }  // namespace dom
  25
  26 class TimelineManager {
  27  public:
  28   explicit TimelineManager(nsPresContext* aPresContext)
  29       : mPresContext(aPresContext) {}
  30
  31   ~TimelineManager() {
  32     MOZ_ASSERT(!mPresContext, "Disconnect should have been called");
  33   }
  34
  35   void Disconnect() {
  36     while (auto* head = mScrollTimelineCollections.getFirst()) {
  37       head->Destroy();
  38     }
  39     while (auto* head = mViewTimelineCollections.getFirst()) {
  40       head->Destroy();
  41     }
  42
  43     mPresContext = nullptr;
  44   }
  45
  46   enum class ProgressTimelineType : uint8_t {
  47     Scroll,
  48     View,
  49   };
  50   void UpdateTimelines(dom::Element* aElement, PseudoStyleType aPseudoType,
  51                        const ComputedStyle* aComputedStyle,
  52                        ProgressTimelineType aType);
  53
  54  private:
  55   template <typename StyleType, typename TimelineType>
  56   void DoUpdateTimelines(nsPresContext* aPresContext, dom::Element* aElement,
  57                          PseudoStyleType aPseudoType,
  58                          const nsStyleAutoArray<StyleType>& aStyleTimelines,
  59                          size_t aTimelineCount);
  60
  61   template <typename T>
  62   void AddTimelineCollection(TimelineCollection<T>* aCollection);
  63
  64   LinkedList<TimelineCollection<dom::ScrollTimeline>>
  65       mScrollTimelineCollections;
  66   LinkedList<TimelineCollection<dom::ViewTimeline>> mViewTimelineCollections;
  67   nsPresContext* mPresContext;
  68 };
  69
  70 template <>
  71 inline void TimelineManager::AddTimelineCollection(
  72     TimelineCollection<dom::ScrollTimeline>* aCollection) {
  73   mScrollTimelineCollections.insertBack(aCollection);
  74 }
  75
  76 template <>
  77 inline void TimelineManager::AddTimelineCollection(
  78     TimelineCollection<dom::ViewTimeline>* aCollection) {
  79   mViewTimelineCollections.insertBack(aCollection);
  80 }
  81
  82 }  // namespace mozilla
  83
  84 #endif  // mozilla_TimelineManager_h