import type { SyntaxStyler } from './syntax_styler.js';
/**
 * Reactive inputs for `create_range_highlighting`. All values are getters so the
 * helper can track the consuming component's reactive state across the call
 * boundary (the Svelte 5 getter-injection pattern).
 */
export interface RangeHighlightingOptions {
    /** The element whose first text node receives the highlight ranges. */
    element: () => Element | undefined;
    /**
     * The text to tokenize. Must match the element's text node exactly (e.g. a
     * textarea backdrop includes its trailing newline here too).
     */
    text: () => string;
    /** Language id; `null` disables highlighting. */
    lang: () => string | null;
    /** The syntax styler whose registered languages back `lang` lookups. */
    syntax_styler: () => SyntaxStyler;
    /** Extra gate — ranges are only applied when this returns true. Defaults to always-on. */
    enabled?: () => boolean;
    /** Component name used in DEV warnings. */
    dev_label: string;
}
/** Reactive outputs from `create_range_highlighting`. */
export interface RangeHighlighting {
    readonly highlighting_disabled: boolean;
}
/**
 * Wires up CSS Custom Highlight API range highlighting for a single element's
 * text node, shared by `CodeHighlight` and `CodeTextarea`. Creates a
 * `HighlightManager`, memoizes tokenization, applies/clears ranges in an effect,
 * emits DEV warnings for unsupported languages, and tears down on destroy.
 *
 * Must be called during component initialization (it uses `$effect`/`onDestroy`).
 */
export declare const create_range_highlighting: (options: RangeHighlightingOptions) => RangeHighlighting;
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