import type { Bounds, Placement } from '@dimina-kit/view-anchor';
export type { Bounds, Placement };
export interface DesiredView<Extra = unknown> {
    viewId: string;
    placement: Placement;
    layer: number;
    extra?: Extra;
}
export interface PlacementSnapshot<Extra = unknown> {
    generation: number;
    epoch: number;
    views: DesiredView<Extra>[];
}
export type ViewOp<Extra = unknown> = {
    kind: 'setBounds';
    viewId: string;
    bounds: Bounds;
    extra?: Extra;
} | {
    kind: 'attach';
    viewId: string;
} | {
    kind: 'setVisible';
    viewId: string;
    visible: boolean;
} | {
    kind: 'detach';
    viewId: string;
} | {
    kind: 'reorder';
    order: string[];
};
export interface ActualView<Extra = unknown> {
    attached: boolean;
    visible: boolean;
    bounds?: Bounds;
    extra?: Extra;
}
export interface ReconcilerState<Extra = unknown> {
    generation: number;
    lastEpoch: number;
    desired: Map<string, DesiredView<Extra>>;
    actual: Map<string, ActualView<Extra>>;
}
export declare function createInitialState<Extra = unknown>(): ReconcilerState<Extra>;
export declare function reconcile<Extra = unknown>(prev: ReconcilerState<Extra>, snapshot: PlacementSnapshot<Extra>): {
    state: ReconcilerState<Extra>;
    ops: ViewOp<Extra>[];
};
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