9962b1c687
Summary: The component will show nothing if root element if not provided. In my case, I just want to reuse it without root specified due to elements are separated ## Explanation for seed and root `flatElements` is the representation of component tree expressed in an array form. It is derived from an object `props.elements` where id (key) is corresponding to its information about a component (value). This includes children ids of a component. `flatElements` allows visual indentation to be easily done at render process; we can use level directly as the number of spaces we need to make. `FlatElements` can be evaluated to tree by: - the lowest number is the root of a tree (in this case, it is 1) - a node with `i+1` level is a child of a closest previous node with level `i` `seed` is the function trying to derive elements in object form to array form. First, it is given that there is one id to be a root node. However, This component will not be rendered if a root node id is not given, while a root node id can be null or undefined, which doesn't make sense to me. In addition, if I want to reuse this component, this component should render without root node id given. That's the reason why there's this diff. The implementation is as followed: 1. Set every node to be root (level 1) 2. Iterate through elements 2.1. Remove nodes that are children of elements because they cannot be roots Assumed that there is no cycle, in the end we get all root nodes. Then, we do `seed` for all root nodes to get all trees in `FlatElements` structure Even though to cover my feature the removal of ids are not needed because we know that all elements will be roots of themselves, I want to cover the case that a user wants tree-like (or forest-like) hierarchy view without given root id. (Disclaimer: this is written from what I have observed while investigating this. I am not a person who have initially designed this, so apologize in advance in this is not correct) Reviewed By: mweststrate Differential Revision: D21214897 fbshipit-source-id: 7657d0ea8607e07e97be968ef927f17c2bc8990e
Flipper 
Flipper (formerly Sonar) is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Flipper as is or extend it using the plugin API.
Table of Contents
- Mobile development
- Extending Flipper
- Contributing to Flipper
- In this repo
- Getting started
- Building from Source
- iOS SDK + Sample App
- Android SDK + Sample app
- Documentation
- Contributing
- License
Mobile development
Flipper aims to be your number one companion for mobile app development on iOS and Android. Therefore, we provide a bunch of useful tools, including a log viewer, interactive layout inspector, and network inspector.
Extending Flipper
Flipper is built as a platform. In addition to using the tools already included, you can create your own plugins to visualize and debug data from your mobile apps. Flipper takes care of sending data back and forth, calling functions, and listening for events on the mobile app.
Contributing to Flipper
Both Flipper's desktop app and native mobile SDKs are open-source and MIT licensed. This enables you to see and understand how we are building plugins, and of course, join the community and help improve Flipper. We are excited to see what you will build on this platform.
In this repo
This repository includes all parts of Flipper. This includes:
- Flipper's desktop app built using Electron (
/desktop) - native Flipper SDKs for iOS (
/iOS) - native Flipper SDKs for Android (
/android) - Plugins:
- Logs (
/desktop/src/device-plugins/logs) - Layout inspector (
/desktop/plugins/layout) - Network inspector (
/desktop/plugins/network) - Shared Preferences/NSUserDefaults inspector (
/desktop/plugins/shared_preferences)
- Logs (
- website and documentation (
/website//docs)
Getting started
Please refer to our Getting Started guide to set up Flipper.
Requirements
- node >= 8
- yarn >= 1.5
- iOS developer tools (for developing iOS plugins)
- Android SDK and adb
Building from Source
Desktop
Running from source
git clone https://github.com/facebook/flipper.git
cd flipper/desktop
yarn
yarn start
NOTE: If you're on Windows, you need to use Yarn 1.5.1 until this issue is resolved.
Building standalone application
Provide either --mac, --win, --linux or any combination of them
to yarn build to build a release zip file for the given platform(s). E.g.
yarn build --mac --version $buildNumber
You can find the resulting artifact in the dist/ folder.
iOS SDK + Sample App
cd iOS/Sample
rm -f Podfile.lock
pod install --repo-update
open Sample.xcworkspace
<Run app from xcode>
You can omit --repo-update to speed up the installation, but watch out as you may be building against outdated dependencies.
Android SDK + Sample app
Start up an android emulator and run the following in the project root:
./gradlew :sample:installDebug
React Native SDK + Sample app
cd react-native/ReactNativeFlipperExample
yarn
yarn android
Note that the first 2 steps need to be done only once.
Alternatively, the app can be started on iOS by running yarn ios.
Troubleshooting
Older yarn versions might show an error / hang with the message 'Waiting for the other yarn instance to finish'. If that happens, run the command yarn first separately in the directory react-native/react-native-flipper.
Documentation
Find the full documentation for this project at fbflipper.com.
Our documentation is built with Docusaurus. You can build it locally by running this:
cd website
yarn
yarn start
Contributing
See the CONTRIBUTING file for how to help out.
License
Flipper is MIT licensed, as found in the LICENSE file.