intellij-sdk-code-samples/cls_tutorial.md

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Custom Language Support Tutorial

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In this tutorial we will add basic support for .properties language and it's usages within Java code.

We will generate parser and PSI elements using Grammar-Kit plugin. The lexer class will be generated with JFlex.

This a step-by-step tutorial and it requires performing every step:

• Prerequisites
• Language and File Type
• Grammar and Parser
• Lexer and Parser Definition
• Syntax Highlighter and Color Settings Page
• PSI Helpers and Utilities
• Annotator
• Line Marker Provider
• Completion Contributor
• Reference Contributor
• Find Usages Provider
• Folding Builder
• Go To Symbol Contributor
• Structure View Factory
• Formatter
• Code Style Settings
• Commenter
• Quick Fix

The final code can be found on GitHub.

For additional information check out the official documentation