Content Updates

• Add information for new Cell.align methods in Kotlin UI DSL Version 2.

Add a new section about how to improve plugin UX and overall plugin quality.

• Add information about threading in Actions in Principal Implementation Overrides.

• Add information about sharing settings between different IDEs installations.

All the content related to themes customization and creating a project using the DevKit approach has been moved to a new Themes part. Content has been refreshed to match the current state of the project and SDK wizards.

Add Spell Checking section with an accompanying tutorial showing how to implement a spell checking for a custom language.

• Add descriptions for the following EPs to Additional Minor Features: Prevent Error Highlighting of Files, Provide Fully Qualified Names (FQN) for Elements, Label Files as Test Files, Move Statements Up and Down in the Editor.

• Add section about Power Save Mode.

• Highlight references automatically via Additional Highlighting

• Language injections: controlling Formatting

Update the Plugin Configuration File page to describe all the elements in detail.

All source links now point to GitHub instead of Upsource (which is going to be sunset).

Add section Status Bar Widgets describing how to implement your own status bar widgets.

• Add overview of Useful Action Base Classes.

Add section PHP Type Providers about type providers describing type inference in PhpStorm and how to implement your own type provider.

Add Postfix Completion section explaining how to implement generating or wrapping the existing code into additional constructs without navigating the caret back.

Add Gradle IntelliJ Plugin documentation to Appendix III — Tooling.

Add the Bundling Plugin API Sources section explaining how to expose plugin API sources to dependent plugin developers.

• Add a small section to Utility Classes describing PhpFilePathUtils utility class.

• Add mention of the way to programmatically open an autocomplete popup to Code Completion.

• Add a small section to Animated Icons describing animated icons.

• Moved Gradle Grammar-Kit Plugin documentation to Appendix III — Tooling

Add Navigation Bar section with an accompanying tutorial showing how to implement a navigation bar for a custom language.

Add section Inlay Hints describing special markers that appear in the editor and provide additional information, like the names of the parameters that a called method expects.

• Add a small section to Editor Components describing convenient EditorTextField subclasses.

• Add descriptions for the following EPs to Additional Minor Features: Recognizing Complex Multi-Block Expressions, Breadcrumbs, Plain Text Completion, Splitting and Joining List Constructs, Suggesting Rename and Change Signature Refactorings, Reader Mode, Background Colors for Editors and Project View, Custom Names and Tooltips for Editor Tabs.

• Add small section to Decorating Project View Nodes describing how to modify the representation of nodes in the project view.

• Add Rename Refactoring paragraphs mentioning RenameInputValidator(Ex).

As API annotated with ApiStatus.@Internal should not be used in plugins, refer to Internal API Migration for a list corresponding API replacements and additional information.

All Code Samples now use Kotlin DSL in their Gradle build scripts.

Add Android Studio Releases List section containing a complete list of the Android Studio releases with the relevant IntelliJ IDEA release version specified.

Add Alternatives to Implementing a Plugin section describing alternative approaches to extending IDE functionality without actual plugin development.

Add Parameter Info section explaining how information about function parameters can be shown in the editor.

Add File and Code Templates section explaining how to implement functionality that allows generating files and code fragments containing repetitive text and patterns.

Add Syntax Errors and Controlling Highlighting sections explaining syntax highlighting basics and filtering highlighting information.

Add sections Application Events and Plugin Management.

Potentially unsafe features must be guarded using Trusted Project API.

Add Language Injection section that shows how the IntelliJ Platform handles different languages within the same source file.

IDE Infrastructure handles Logging, Error Reporting, Runtime Information, and how to provide Context Help.

Extension Point and Listener List now contains sections listing all provided Listener Topics. See also corresponding Extension Point Lists under Part VIII — Product Specific. Also, all deprecated API now has a dedicated tag.

Plugin Signing describes the plugin signing process, explains how to generate a certificate, configure the Gradle signPlugin task, and introduces a standalone CLI tool.

Testing FAQ page lists common issues, useful classes, and techniques for writing and maintaining tests.

Add Documentation section with an accompanying tutorial that show how to implement a DocumentationProvider for custom languages.

See Part VIII — Product Specific.

Add a new section Explore the IntelliJ Platform API that describes how plugin authors work with the IntelliJ Platform API and what tools they use.

Add a new section about Element Patterns that are used when implementing Completion Contributors or PSI Reference Contributors.

Add a new section about Text Selection EPs and describe ExtendWordSelectionHandler.

Added a code sample to the SDK tutorial that expands on assisting in the setup of an SDK.

Unified Abstract Syntax Tree (UAST) allows providing features that will work across all supported JVM languages (Java, Kotlin, Scala, Groovy).

Explore usages of Extension Points in open-source plugins using IntelliJ Platform Explorer.

All EPs available in IJ Platform and Android can now be browsed conveniently.

All code samples used in this guide now come with README, making it easier to browse them. They can be conveniently accessed via a separate GitHub repository.

Added new sections Code and Troubleshooting to Dynamic Plugins.

Create new plugins with a preconfigured project scaffold and CI in one click.

Added reference discussing resource cleanup/management.

Added guide and tutorial on integrating with IDE Settings dialog.

Inspect Swing components and associated data (like AnAction for menu item) using UI Inspector.

Allows embedding Chromium-based browser in the IDE.

All samples now use the recommended solution of setting up plugin projects.

The corresponding tutorial and Testing a Custom Language Plugin have been updated and enhanced as well.

Part VIII — Product Specific has been expanded massively, now also covering each IDE with its dedicated page.

Added starting point Dynamic Plugins for migrating plugins (IntelliJ Platform 2020.1 and later).

Components being a legacy feature, the updated page describes migrating them to modern replacement API.

All contents have been moved to JetBrains Marketplace Documentation.

Optimizing performance when working with PSI, during indexing, and Avoiding UI Freezes.

Describes preferred way of building UI/dialogs for IntelliJ Platform 2019.2 and later.