@f12io/maple-language-core

Editor-agnostic language tooling for Maple CSS Engine: region discovery, class extraction, string grammar, and class formatting logic. This package is the single source of truth consumed by the Maple VS Code extension and @f12io/prettier-plugin-maple.

What it provides

• LanguageServiceRegistry.getService(languageId) — a language service for html, javascript(react), typescript(react), vue, svelte, php, razor, aspnetcorerazor, and twig.
• service.collectRegions(text) — every maple region in a document (class attributes, className={...}, clsx()/cva() arguments, /* maple */ opt-in expressions, framework bindings), typed as raw class text or code expressions.
• service.extractClasses(text) — class instances with exact document offsets, interpolation-aware per language (JS template literals, C# interpolated strings, PHP blocks, Razor expressions).
• formatClasses / computeFormattingEdits / formatText — the layout engine: wraps class lists by property group, preserves ternary and concatenation structure, and upgrades string delimiters only when the host language allows multi-line strings.

Usage

import {
  LanguageServiceRegistry,
  formatText,
} from '@f12io/maple-language-core';

const service = LanguageServiceRegistry.getService('javascriptreact');
const instances = service.extractClasses(source);

const formatted = formatText(source, 'javascriptreact', 4);

License

Released under the Root Source License (ROOT), an MIT-style permissive license with an additional distribution condition for systems that can recreate the source on demand. © f12.io