mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Joshua Gross
edceba9a9c
Summary: Small perf wins for both iOS and Android. Reviewed By: PeteTheHeat Differential Revision: D14237532 fbshipit-source-id: 2be114d36adfa6e8540cb8cbca5412782791d8ce
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <react/components/slider/SliderMeasurementsManager.h>
|
|
#include <react/components/slider/SliderShadowNode.h>
|
|
#include <react/core/ConcreteComponentDescriptor.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
/*
|
|
* Descriptor for <Slider> component.
|
|
*/
|
|
class SliderComponentDescriptor final
|
|
: public ConcreteComponentDescriptor<SliderShadowNode> {
|
|
public:
|
|
SliderComponentDescriptor(
|
|
EventDispatcher::Shared eventDispatcher,
|
|
const SharedContextContainer &contextContainer)
|
|
: ConcreteComponentDescriptor(eventDispatcher),
|
|
// TODO (39486757): implement image manager on Android, currently Android does
|
|
// not have an ImageManager so this will crash
|
|
#ifndef ANDROID
|
|
imageManager_(
|
|
contextContainer
|
|
? contextContainer->getInstance<SharedImageManager>(
|
|
"ImageManager")
|
|
: nullptr),
|
|
#else
|
|
imageManager_(nullptr),
|
|
#endif
|
|
measurementsManager_(
|
|
SliderMeasurementsManager::shouldMeasureSlider()
|
|
? std::make_shared<SliderMeasurementsManager>(contextContainer)
|
|
: nullptr) {
|
|
}
|
|
|
|
void adopt(UnsharedShadowNode shadowNode) const override {
|
|
ConcreteComponentDescriptor::adopt(shadowNode);
|
|
|
|
assert(std::dynamic_pointer_cast<SliderShadowNode>(shadowNode));
|
|
auto sliderShadowNode =
|
|
std::static_pointer_cast<SliderShadowNode>(shadowNode);
|
|
|
|
// `SliderShadowNode` uses `ImageManager` to initiate image loading and
|
|
// communicate the loading state and results to mounting layer.
|
|
sliderShadowNode->setImageManager(imageManager_);
|
|
|
|
if (measurementsManager_) {
|
|
// `SliderShadowNode` uses `SliderMeasurementsManager` to
|
|
// provide measurements to Yoga.
|
|
sliderShadowNode->setSliderMeasurementsManager(measurementsManager_);
|
|
|
|
// All `SliderShadowNode`s must have leaf Yoga nodes with properly
|
|
// setup measure function.
|
|
sliderShadowNode->enableMeasurement();
|
|
}
|
|
}
|
|
|
|
private:
|
|
const SharedImageManager imageManager_;
|
|
const std::shared_ptr<SliderMeasurementsManager> measurementsManager_;
|
|
};
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|