/**
 * The low-level parsing behind `tabStopsIn`: balanced-bracket and value scanning,
 * a tag's attribute value, the binding/import RESOLVER (name → its home file and
 * definition, expanded across hops), and the two per-tag predicates —
 * `tagDeclaresTab` (is this a tab stop?) and `taiClassesOf` (which `tai-*` classes
 * does it wear?).
 */
/**
 * The text from `start` to the character closing the bracket it opens, quotes
 * respected so a brace inside a string neither opens nor closes anything.
 */
export declare function balancedFrom(source: string, start: number, open: string, close: string): string;
export declare function readAssignmentValue(source: string, start: number): string;
/**
 * The index of the `>` closing an opening tag whose attribute run starts at
 * `from`, quotes and brace depth tracked so a `>` inside a `className` expression
 * (`{x > 0 ? a : b}`) is not mistaken for it.
 */
export declare function scanToTagClose(source: string, from: number): number;
/** One opening JSX tag: its element name and everything between that and the `>`. */
export interface OpeningTag {
    readonly name: string;
    readonly attributes: string;
}
/**
 * The value written for `attribute`, unquoted or unbraced; `undefined` when the
 * tag does not write it at all, which is the difference between "no `tabIndex`"
 * and "`tabIndex={-1}`".
 */
export declare function attributeValue(attributes: string, attribute: string): string | undefined;
/** Resolves a referenced name to the file it is bound in and its definition text. */
export interface TabStopResolver {
    /** Where a name is bound: the file itself, or the file it is imported from. */
    homeOf(file: string, name: string): string | undefined;
    /** The definition text of `name` bound in `home`, if any. */
    definitionOf(home: string, name: string): string | undefined;
    /**
     * `text` with the definition of every name it references appended, to `depth`
     * hops — a class reaches its element through as many as three (the tag names a
     * helper, the helper names a table, the table holds the literal).
     */
    expand(text: string, file: string, depth: number, seen: Set<string>): string;
}
/** A resolver over pre-scanned per-file binding and import maps. */
export declare function createTabStopResolver(bindings: ReadonlyMap<string, Map<string, string>>, imports: ReadonlyMap<string, Map<string, string>>): TabStopResolver;
/**
 * Whether the tag is a keyboard tab stop: a natively focusable element, an element
 * with a non-negative `tabIndex`, or one spreading a props object that declares one.
 */
export declare function tagDeclaresTab(tag: OpeningTag, file: string, resolver: TabStopResolver): boolean;
/** The `tai-*` classes the tag wears, expanded through its bindings to `depth` 3. */
export declare function taiClassesOf(tag: OpeningTag, file: string, resolver: TabStopResolver): string[];
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