import { EditorState } from '@codemirror/state';
import { LineMapping } from '../types';
import { ClassificationCounts } from './diff-folding';
export interface FoldPlaceholderData {
    counts: ClassificationCounts;
    isSpacer: boolean;
}
/**
 * Compute classification counts for a specific folded range.
 * Called by CodeMirror's `preparePlaceholder` with the exact fold range.
 * Only counts lines that have real content on this editor's side
 * (skips spacer lines from the opposite side).
 */
export declare function prepareFoldPlaceholder(state: EditorState, range: {
    from: number;
    to: number;
}, side: "before" | "after" | "unified", lineMap: LineMapping[]): FoldPlaceholderData;
/**
 * Create a fold placeholder DOM element with classification counter badges.
 * Receives pre-computed classification counts from `prepareFoldPlaceholder`.
 */
export declare function createFoldPlaceholder(prepared: FoldPlaceholderData, onclick?: (event: Event) => void): HTMLElement;