121 lines
2.8 KiB
C++
121 lines
2.8 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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#include "Timeline.h"
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#include <react/renderer/uimanager/UIManager.h>
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namespace facebook::react {
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Timeline::Timeline(const ShadowTree& shadowTree) : shadowTree_(&shadowTree) {
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record(shadowTree.getCurrentRevision().rootShadowNode);
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};
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#pragma mark - Public
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SurfaceId Timeline::getSurfaceId() const noexcept {
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return shadowTree_->getSurfaceId();
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}
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void Timeline::pause() const noexcept {
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std::scoped_lock lock(mutex_);
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assert(!paused_ && "");
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paused_ = true;
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}
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void Timeline::resume() const noexcept {
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std::scoped_lock lock(mutex_);
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if (!snapshots_.empty()) {
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rewind(snapshots_.at(snapshots_.size() - 1));
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}
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assert(paused_ && "");
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paused_ = false;
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}
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bool Timeline::isPaused() const noexcept {
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std::scoped_lock lock(mutex_);
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return paused_;
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}
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TimelineFrame::List Timeline::getFrames() const noexcept {
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std::scoped_lock lock(mutex_);
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auto frames = TimelineFrame::List{};
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frames.reserve(snapshots_.size());
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for (const auto& snapshot : snapshots_) {
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frames.push_back(snapshot.getFrame());
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}
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return frames;
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}
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TimelineFrame Timeline::getCurrentFrame() const noexcept {
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assert(snapshots_.size() > currentSnapshotIndex_);
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return snapshots_.at(currentSnapshotIndex_).getFrame();
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}
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void Timeline::rewind(const TimelineFrame& frame) const noexcept {
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std::scoped_lock lock(mutex_);
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rewind(snapshots_.at(frame.getIndex()));
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}
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RootShadowNode::Unshared Timeline::shadowTreeWillCommit(
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const ShadowTree& /*shadowTree*/,
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const RootShadowNode::Shared& /*oldRootShadowNode*/,
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const RootShadowNode::Unshared& newRootShadowNode) const noexcept {
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std::scoped_lock lock(mutex_);
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if (rewinding_) {
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return newRootShadowNode;
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}
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record(newRootShadowNode);
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if (paused_) {
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return nullptr;
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}
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return newRootShadowNode;
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}
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#pragma mark - Private & Internal
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void Timeline::record(
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const RootShadowNode::Shared& rootShadowNode) const noexcept {
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auto index = (int)snapshots_.size();
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snapshots_.push_back(TimelineSnapshot{rootShadowNode, index});
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if (!paused_) {
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currentSnapshotIndex_ = index;
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}
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}
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void Timeline::rewind(const TimelineSnapshot& snapshot) const noexcept {
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std::scoped_lock lock(mutex_);
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currentSnapshotIndex_ = snapshot.getFrame().getIndex();
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assert(!rewinding_ && "");
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rewinding_ = true;
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auto rootShadowNode = snapshot.getRootShadowNode();
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shadowTree_->commit(
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[&](const RootShadowNode& /*oldRootShadowNode*/)
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-> RootShadowNode::Unshared {
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return std::static_pointer_cast<RootShadowNode>(
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rootShadowNode->ShadowNode::clone({}));
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},
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{});
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assert(rewinding_ && "");
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rewinding_ = false;
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}
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} // namespace facebook::react
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