/**
 * What the digital outputs (#1230, #1231) need beside the records: the
 * words of the exercise bar, how answers are checked and kept, and each
 * style's colours. The layout carries it on `VDTDocument.exerciseDigital`;
 * `exerciseDataOf` joins it with the records into the JSON the HTML output
 * writes for the exercise script (`attachExercises`, `EXERCISE_SCRIPT`).
 */
import type { ExerciseSettings, ExerciseWords } from '../defaults/exercises.js';
import type { ExerciseRecord } from './record.js';
import type { Dimension } from '../types.js';
/** The words of the digital outputs, in the document language. */
export type ExerciseDigitalWords = Pick<ExerciseWords, 'exercise' | 'trueFalse' | 'check' | 'showSolution' | 'hideSolution' | 'reset' | 'correct' | 'wrong' | 'hint' | 'blank' | 'score'>;
/** How one exercise style looks answered. */
export interface ExerciseDigitalStyleInfo {
    /** Right and wrong feedback, and the answers a solution shows. */
    correct: string;
    wrong: string;
    answer: string;
    /** The option marker (`options.marker`): a box or a ring is ticked, a
     *  bare label is ringed. */
    marker: 'none' | 'box' | 'circle';
    /** The true and false labels (`trueFalse.labels`). */
    trueFalse: [string, string];
}
export interface ExerciseDigital {
    words: ExerciseDigitalWords;
    /** `exercises.digital`. */
    interactive: boolean;
    persist: boolean;
    check: 'button' | 'instant';
    styles: Record<string, ExerciseDigitalStyleInfo>;
}
/** The digital part of a document's exercise settings. */
export declare function exerciseDigitalOf(settings: ExerciseSettings): ExerciseDigital;
/** The JSON an HTML output writes for the exercise script
 *  (`<script type="application/json" class="pt-exercises">`). */
export interface ExerciseData extends ExerciseDigital {
    /** Page pixels to a point: grid geometry in the records is in points
     *  from a drawn box's top left. */
    pxPerPt: number;
    /** The body text's size, page pixels: the size of the exercise bar. */
    bodyPx: number;
    /** The boxes stand in the text's flow (a reflowable book) rather than
     *  on a positioned page: the bar and the solution follow the box, sized
     *  in ems of its text. */
    flow?: boolean;
    exercises: ExerciseRecord[];
}
/** The exercise data of a laid-out document, or `undefined` when it has
 *  no exercises (or its exercises are not answerable,
 *  `exercises.digital.interactive: false`). */
export declare function exerciseDataOf(doc: {
    exercises?: ExerciseRecord[];
    exerciseDigital?: ExerciseDigital;
    config: {
        page: {
            dpi: number;
        };
        bodyText: {
            fontSize: Dimension;
        };
    };
}): ExerciseData | undefined;
/** `data` as the text of a `<script type="application/json">`, in HTML
 *  or XHTML: no `<` that would close the element early, no `&` an XML
 *  parser would read as a reference, no line separators a reader might
 *  trip on. */
export declare function exerciseDataJson(data: ExerciseData): string;
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