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9395485822
Summary: @public Previously, ContextContainer could store only `shared_ptr`s, but now it wraps all values in own `shared_ptr` container. I wish we can use `unique_ptr` here, but apparently we cannot because `unique_ptr` does not support type-erasure (`std::unique_ptr<void>` is illigal). Becasue ContextContainer is not supposed to be used in hot paths, the performance aspect of that does not actually matter. Reviewed By: mdvacca Differential Revision: D8853446 fbshipit-source-id: e5d0a5595fe44c59f1395d6ffccf9d3fed923c83
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 <fabric/components/image/ImageShadowNode.h>
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#include <fabric/core/ConcreteComponentDescriptor.h>
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#include <fabric/imagemanager/ImageManager.h>
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#include <fabric/uimanager/ContextContainer.h>
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namespace facebook {
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namespace react {
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/*
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* Descriptor for <Image> component.
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*/
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class ImageComponentDescriptor final:
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public ConcreteComponentDescriptor<ImageShadowNode> {
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public:
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ImageComponentDescriptor(SharedEventDispatcher eventDispatcher, const SharedContextContainer &contextContainer):
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ConcreteComponentDescriptor(eventDispatcher),
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imageManager_(contextContainer->getInstance<SharedImageManager>()) {}
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void adopt(UnsharedShadowNode shadowNode) const override {
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ConcreteComponentDescriptor::adopt(shadowNode);
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assert(std::dynamic_pointer_cast<ImageShadowNode>(shadowNode));
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auto imageShadowNode = std::static_pointer_cast<ImageShadowNode>(shadowNode);
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// `ImageShadowNode` uses `ImageManager` to initiate image loading and
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// communicate the loading state and results to mounting layer.
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imageShadowNode->setImageManager(imageManager_);
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}
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private:
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const SharedImageManager imageManager_;
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};
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} // namespace react
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} // namespace facebook
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