Notable Changes in IntelliJ Platform and Plugins API 2021.*

Notable Changes in IntelliJ Platform 2021.3

Notable Changes in IntelliJ Platform 2021.2

Unit test mode: non-production IconManager

Now com.intellij.ui.IconManager.createDeferredIcon() doesn't use iconProducer which might result in "wrong" composite icons and failed assertions. Override UsefulTestCase.isIconRequired() returning true to restore production icons. Alternatively, invoke Registry.get("psi.deferIconLoading").setValue(false) in setUp() and Registry.get("psi.deferIconLoading").resetToDefault() in tearDown().

Constructor Injection disabled for Extensions

Please obtain necessary components only when needed (logged as ERROR now).

Notable Changes in IntelliJ IDEA 2021.2

Unbundled plugins

Several plugins (Arquillian, AspectJ, CoffeeScript, Debugger Support for JSP (JSR45), Drools, Guice, Helidon, Java EE: Enterprise Java Beans (EJB), Spring OSGi, Spring Web Flow) have been unbundled. The IDE will suggest installation if the project contains related framework dependency. If your plugin depends on them, users will need to install them from the JetBrains Plugins Repository.

Notable Changes in IntelliJ Platform 2021.1

Add unambiguous imports on the fly for custom languages

Override ReferenceImporter#isAddUnambiguousImportsOnTheFlyEnabled() and provide corresponding user setting. Implement HintAction with fixSilently() and hook it up to highlighting as a quick fix for unresolved reference.

Ability to override encoding per VirtualFile

Implement FileEncodingProvider and register in com.intellij.fileEncodingProvider extension point.

JCEF: wrapper for CefBrowser

JBCefOsrHandlerBrowser forwards to custom CefRenderHandler, e.g., for off-screen rendering.

Notable Changes in Java Plugin 2021.1

Testframework: JUnit4 variant for LightJavaCodeInsightFixtureTestCase

Use com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase4.