export interface FormField<K extends string = string> {
    key: K;
    label: string;
    value: string;
    cursor?: number;
    hint?: string;
    error?: string;
    section?: string;
    truncate?: "end" | "start";
}
export interface FormState<K extends string = string, F extends FormField<K> = FormField<K>> {
    fields: Record<K, F>;
    focus: K;
    order: K[];
}
export interface RequiredValidationResult<K extends string = string, F extends FormField<K> = FormField<K>> {
    ok: boolean;
    state: FormState<K, F>;
}
export declare function createForm<K extends string, F extends FormField<K> = FormField<K>>(fields: F[], focus?: K): FormState<K, F>;
export declare function moveFocus<K extends string, F extends FormField<K>>(state: FormState<K, F>, delta: number): FormState<K, F>;
export declare function setFocus<K extends string, F extends FormField<K>>(state: FormState<K, F>, key: K): FormState<K, F>;
export declare function appendChar<K extends string, F extends FormField<K>>(state: FormState<K, F>, char: string): FormState<K, F>;
export declare function backspace<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function deleteForward<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function moveFieldCursor<K extends string, F extends FormField<K>>(state: FormState<K, F>, delta: number): FormState<K, F>;
export declare function moveFieldCursorHome<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function moveFieldCursorEnd<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function moveFieldCursorWordLeft<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function moveFieldCursorWordRight<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function backspaceFieldWord<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function deleteFieldWord<K extends string, F extends FormField<K>>(state: FormState<K, F>): FormState<K, F>;
export declare function validateRequired<K extends string, F extends FormField<K>>(state: FormState<K, F>, keys?: K[]): RequiredValidationResult<K, F>;
export declare function value<K extends string, F extends FormField<K>>(state: FormState<K, F>, key: K): string;
export declare function setValue<K extends string, F extends FormField<K>>(state: FormState<K, F>, key: K, newValue: string, cursor?: number): FormState<K, F>;