/**
 * Content warnings of composed pages (#854, DESIGN §3.2, §5.7): a page
 * fence naming no template, a slot the template lacks, a template frame
 * that receives nothing, a fence and a template that disagree about
 * spreads (#861). Pure: read from the parsed pages and the
 * configuration, before any layout.
 */
import type { ContentWarning } from '../vdt.js';
import type { ContentBlock } from '../parse/types.js';
import { type ParsedComposedPage } from './document.js';
import type { ComposedPagesConfigKeys } from './types.js';
/** The composed-page warnings, as {@link checkComposedSlots} returns them
 *  (source offsets as in the pages it read). */
export type ComposedSlotWarning = Extract<ContentWarning, {
    kind: 'templateUnknown' | 'slotUnknown' | 'slotEmpty' | 'spreadMismatch' | 'repeatOverflow' | 'moduleUnknown' | 'moduleAsPage' | 'moduleNested' | 'moduleNameRejected';
}>;
/**
 * `templateUnknown`, `slotUnknown` and `slotEmpty` for each page:
 *
 * - `templateUnknown`: `template="…"` names no `pageTemplates` id (or the
 *   fence names none). The page's slots are not checked.
 * - `slotUnknown`: content names a slot that is no frame of the template;
 *   it goes to the flow frame. Points at the first `slot="…"` value.
 * - `slotEmpty`: a frame receives nothing (no slot names it, it `takes` no
 *   heading of the page, and, for the flow frame, no content is left
 *   without a slot). Not raised for an `optional` frame, nor for a frame
 *   other frames continue into (`next`, `overflow.continueIn: '#x'`),
 *   which fills only when they overflow, nor for the frame of a later page
 *   that a story jumps to (`overflow.continueIn: 'page:<id>'`, #917).
 * - `spreadMismatch`: the fence's `spread` flag and the template's `spread`
 *   (inherited through `extends`) differ. The template decides: a spread
 *   template is laid over two facing pages, any other on one page. Points
 *   at the `spread` attribute, else the `template` value.
 */
export declare function checkComposedSlots(pages: readonly ParsedComposedPage[], config: Pick<ComposedPagesConfigKeys, 'pageTemplates'> | undefined): ComposedSlotWarning[];
/**
 * `lookUnknown` (#1089): each `:::frame` piece of a composed page whose
 * `look="…"` names no `frameLooks` entry (an empty value names none), at
 * the attribute's value, with the nearest id. `blocks` is the parsed
 * stream (source offsets as there).
 */
export declare function checkFrameLookNames(blocks: readonly ContentBlock[], config: Pick<ComposedPagesConfigKeys, 'frameLooks'> | undefined): Extract<ContentWarning, {
    kind: 'lookUnknown';
}>[];
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