79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/renderer/core/LayoutPrimitives.h>
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#include <react/renderer/timeline/TimelineFrame.h>
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#include <react/renderer/uimanager/UIManagerCommitHook.h>
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namespace facebook::react {
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class Timeline;
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class TimelineHandler final {
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public:
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~TimelineHandler() noexcept;
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/*
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* Movable, not copyable.
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*/
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TimelineHandler(TimelineHandler&& other) noexcept;
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TimelineHandler(const TimelineHandler& timelineHandler) = delete;
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TimelineHandler& operator=(TimelineHandler&& other) noexcept;
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TimelineHandler& operator=(const TimelineHandler& other) = delete;
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/*
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* Stops (or resumes) mounting of new commits.
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* A surface has to be paused to allow rewinding the UI to some past commit.
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*/
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void pause() const noexcept;
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void resume() const noexcept;
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bool isPaused() const noexcept;
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/*
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* Provides access to recorded frames.
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*/
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TimelineFrame::List getFrames() const noexcept;
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TimelineFrame getCurrentFrame() const noexcept;
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/*
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* Rewinds the UI to a given frame.
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*/
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void rewind(const TimelineFrame& frame) const noexcept;
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/*
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* Rewinds the UI for a given number of frames back or forward.
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*/
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void seek(int delta) const noexcept;
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private:
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friend class TimelineController;
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/*
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* Can only be constructed by `TimelineController`.
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*/
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TimelineHandler(const Timeline& timeline) noexcept;
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/*
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* Must be called before deallocation to make it not crash.
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* Must be only called by `TimelineController`.
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*/
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void release() noexcept;
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/*
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* Returns a `SurfaceId` of the assigned Surface.
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*/
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SurfaceId getSurfaceId() const noexcept;
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void ensureNotEmpty() const noexcept;
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const Timeline* timeline_{};
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};
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} // namespace facebook::react
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