import { ContentItem, CustomFieldDef, PopupModal } from './types';
/**
 * The form's items, minus anything there is no way to render: a null or a bare
 * string where an item belongs, and any `type` the renderer has no case for.
 *
 * Every read of `contentItems` in the renderer goes through here, so nothing
 * deeper in has to ask again — which matters because a `.type` or an `.order`
 * read on a null entry throws mid-render, and React answers a throw by
 * unmounting the tree it escaped from. One malformed entry used to cost the
 * whole card: a blank space on the page where the form should have been.
 */
export declare function renderableItems(popup: PopupModal): ContentItem[];
/**
 * The form without the items no renderer can draw. Quiet — pair it with
 * {@link reportUnsupportedItems} at the one point where saying so is useful.
 *
 * Returns the form it was given when there's nothing to drop, matching
 * `withPinnedFields` and `withEnforcedFieldRules` — the editor leans on that
 * identity to tell "the form arrived needing a correction" from "the form
 * arrived fine", and only notifies the host in the first case.
 */
export declare function withoutUnsupportedItems(popup: PopupModal): PopupModal;
/**
 * Name every item that had to be left out, on the console.
 *
 * Separate from the drop above because the drop is cheap and happens on every
 * read, while this is a message meant to be read once. Called from the editor as
 * a form arrives — the last moment an author is still looking at a screen and
 * can be told the field they were promised isn't going to work.
 */
export declare function reportUnsupportedItems(popup: PopupModal): void;
/**
 * The host's fields, minus any whose `type` doesn't map onto something we can
 * render, reporting what it dropped. Keeps an unrenderable field out of the
 * picker, so an author can't add one and watch it vanish from the live form.
 *
 * Loud, unlike the item drop above, because it is read from a memo rather than
 * on every render — see the call in `FormEditor`.
 *
 * Same identity contract: the array it was given, when all of them are fine.
 */
export declare function supportedCustomFields(fields: CustomFieldDef[] | undefined): CustomFieldDef[] | undefined;