import type { ElkNode, LayoutOptions } from 'elkjs/lib/elk-api';
import type { WorkflowGraphProjection } from 'openxiangda-contracts/browser';
type Point = {
    x: number;
    y: number;
};
type NodePosition = {
    x: number;
    y: number;
    width: number;
    height: number;
    input: {
        id: string;
        x: number;
    };
    outputs: Array<{
        id: string;
        x: number;
    }>;
};
export type WorkflowFlowPositions = {
    nodes: Map<string, NodePosition>;
    edges: Map<string, {
        points: Point[];
        label: Point;
    }>;
};
/** Place ordinary insertion controls halfway along their orthogonal route. */
export declare function connectorMidpoint(points: Point[]): Point;
/** Structured forks are atomic blocks in their enclosing layout. Conditions use
 * their nearest common post-dominator, never an inferred executable graph edge.
 * A branch's local merge is virtual when shared with its enclosing fork. */
export declare function layoutDesignerRegions(graph: WorkflowGraphProjection, positions: WorkflowFlowPositions, engine: {
    layout: (graph: ElkNode) => Promise<ElkNode>;
}, layoutOptions: LayoutOptions): Promise<WorkflowFlowPositions>;
export {};
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