facebook/yoga

Yoga is an embeddable layout engine targeting web standards. https://yogalayout.dev/

Download

Step 1. Add the JitPack repository to your build file

Add it in your root settings.gradle at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url 'https://jitpack.io' }
		}
	}

Add it in your settings.gradle.kts at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url = uri("https://jitpack.io") }
		}
	}

Add to pom.xml

	<repositories>
		<repository>
		    <id>jitpack.io</id>
		    <url>https://jitpack.io</url>
		</repository>
	</repositories>

Add it in your build.sbt at the end of resolvers:

 
    resolvers += "jitpack" at "https://jitpack.io"

Add it in your project.clj at the end of repositories:

 
    :repositories [["jitpack" "https://jitpack.io"]]

Step 2. Add the dependency

	dependencies {
		implementation 'com.github.facebook:yoga:'
	}
	dependencies {
		implementation("com.github.facebook:yoga:")
	}
	<dependency>
	    <groupId>com.github.facebook</groupId>
	    <artifactId>yoga</artifactId>
	    <version></version>
	</dependency>

                            
    libraryDependencies += "com.github.facebook" % "yoga" % ""
        
        

                            
    :dependencies [[com.github.facebook/yoga ""]]

Readme

Yoga CocoaPods npm Maven Central SPM

Yoga is an embeddable and performant flexbox layout engine with bindings for multiple languages.

Building

Yoga's main implementation targets C++ 20 with accompanying build logic in CMake. A wrapper is provided to build the main library and run unit tests.

./unit_tests <Debug|Release>

While not required, this script will use ninja if it is installed for faster builds.

Yoga is additionally part of the vcpkg collection of ports maintained by Microsoft and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.

Adding Tests

Many of Yoga's tests are automatically generated, using HTML fixtures describing node structure. These are rendered in Chrome to generate an expected layout result for the tree. New fixtures can be added to gentest/fixtures.

<div id="my_test" style="width: 100px; height: 100px; align-items: center;">
  <div style="width: 50px; height: 50px;"></div>
</div>

To generate new tests from added fixtures:

  1. Ensure you have yarn classic installed.
  2. Run yarn install to install dependencies for the test generator.
  3. Run yarn gentest in the yoga directory.

Debugging

Yoga provides a VSCode "launch.json" configuration which allows debugging unit tests. Simply add your breakpoints, and run "Debug C++ Unit tests (lldb)" (or "Debug C++ Unit tests (vsdbg)" on Windows).