/**
 * Pure ResizablePanels layout math (SURF-001).
 * All sizes are percentages; a layout always sums to 100 (±0.01).
 * No DOM, no events — the component layer feeds pointer deltas in.
 */
export interface PanelConstraint {
    /** Minimum size in percent (default 0). */
    min?: number | undefined;
    /** Maximum size in percent (default 100). */
    max?: number | undefined;
    /** Panel may collapse to `collapsedSize` (default 0) instead of `min`. */
    collapsible?: boolean | undefined;
    /** Size used when collapsed (default 0). */
    collapsedSize?: number | undefined;
    /** Size restored by expandPanel (default `min`). */
    expandedSize?: number | undefined;
}
interface Normalized {
    min: number;
    max: number;
    collapsible: boolean;
    collapsedSize: number;
    expandedSize: number;
}
export declare function normalize(c: PanelConstraint | undefined): Normalized;
/**
 * Move the boundary after `handleIndex` by `deltaPercent` (positive grows
 * panels left/above the handle, negative grows panels after it).
 * Panels push their neighbors when they hit their own bounds; the layout
 * always keeps its original sum.
 */
export declare function resizePanels(layout: readonly number[], constraints: readonly PanelConstraint[], handleIndex: number, deltaPercent: number): number[];
/** Collapse `panelIndex` to its collapsedSize, distributing the freed space to neighbors. */
export declare function collapsePanel(layout: readonly number[], constraints: readonly PanelConstraint[], panelIndex: number): number[];
/** Restore `panelIndex` to its expandedSize, taking space from the same neighbor. */
export declare function expandPanel(layout: readonly number[], constraints: readonly PanelConstraint[], panelIndex: number): number[];
/** Convert pixel sizes to a percent layout summing to exactly 100. */
export declare function toPercent(sizesPx: readonly number[], totalPx: number): number[];
export {};
//# sourceMappingURL=resizePanels.d.ts.map