mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Andres Suarez
3b31e69e28
Summary: Changelog: [General] [Fixed] - License header cleanup Reviewed By: yungsters Differential Revision: D17952694 fbshipit-source-id: 17c87de7ebb271fa2ac8d00af72a4d1addef8bd0
84 lines
2.1 KiB
C++
84 lines
2.1 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/imagemanager/ImageResponse.h>
|
|
#include <react/imagemanager/ImageResponseObserver.h>
|
|
|
|
#include <better/small_vector.h>
|
|
#include <mutex>
|
|
#include <vector>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
/*
|
|
* The ImageResponseObserverCoordinator receives events and completed image
|
|
* data from native image loaders and sends events to any observers attached
|
|
* to the coordinator. The Coordinator also keeps track of response status
|
|
* and caches completed images.
|
|
*/
|
|
class ImageResponseObserverCoordinator {
|
|
public:
|
|
/*
|
|
* Interested parties may observe the image response.
|
|
* If the current image request status is not equal to `Loading`, the observer
|
|
* will be called immediately.
|
|
*/
|
|
void addObserver(ImageResponseObserver const &observer) const;
|
|
|
|
/*
|
|
* Interested parties may stop observing the image response.
|
|
*/
|
|
void removeObserver(ImageResponseObserver const &observer) const;
|
|
|
|
/*
|
|
* Platform-specific image loader will call this method with progress updates.
|
|
*/
|
|
void nativeImageResponseProgress(float progress) const;
|
|
|
|
/*
|
|
* Platform-specific image loader will call this method with a completed image
|
|
* response.
|
|
*/
|
|
void nativeImageResponseComplete(ImageResponse const &imageResponse) const;
|
|
|
|
/*
|
|
* Platform-specific image loader will call this method in case of any
|
|
* failures.
|
|
*/
|
|
void nativeImageResponseFailed() const;
|
|
|
|
private:
|
|
/*
|
|
* List of observers.
|
|
* Mutable: protected by mutex_.
|
|
*/
|
|
mutable better::small_vector<ImageResponseObserver const *, 1> observers_;
|
|
|
|
/*
|
|
* Current status of image loading.
|
|
* Mutable: protected by mutex_.
|
|
*/
|
|
mutable ImageResponse::Status status_{ImageResponse::Status::Loading};
|
|
|
|
/*
|
|
* Cache image data.
|
|
* Mutable: protected by mutex_.
|
|
*/
|
|
mutable std::shared_ptr<void> imageData_;
|
|
|
|
/*
|
|
* Observer and data mutex.
|
|
*/
|
|
mutable std::mutex mutex_;
|
|
};
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|