import type { Columns, GridDefaults, GridEntry, GridState, Mode, Rows } from "../types";
/**
 * Generates the `grid-template-columns` CSS string based on the column definitions.
 * Handles hiding handles for collapsed columns.
 *
 * @param groups - The list of columns.
 * @param handleSize - The size of the resize handle (default: "1rem").
 * @returns A CSS string for `grid-template-columns`.
 */
export declare let getGridTemplateColumns: (groups: Columns, handleSize?: string) => string;
/**
 * Calculates the `grid-column` CSS property for a specific column index.
 * Accounts for the fact that handles are inserted between columns.
 *
 * @param start - The 1-based start index of the column.
 * @param end - The 1-based end index of the column.
 * @returns A CSS string for `grid-column` (e.g., "1 / 3").
 */
export declare let getGridColumn: (start: number, end: number) => string;
/**
 * Calculates the `grid-column` CSS property for a resize handle.
 *
 * @param index - The 0-based index of the handle.
 * @returns A CSS string for `grid-column`.
 */
export declare let getGridColumnHandle: (index: number) => string;
/**
 * Generates the `grid-template-rows` CSS string based on the row definitions.
 * Handles hiding handles for collapsed rows.
 *
 * @param groups - The list of rows.
 * @param handleSize - The size of the resize handle (default: "1rem").
 * @returns A CSS string for `grid-template-rows`.
 */
export declare let getGridTemplateRows: (groups: Rows, handleSize?: string) => string;
/**
 * Calculates the `grid-row` CSS property for a specific row index.
 * Accounts for the fact that handles are inserted between rows.
 *
 * @param start - The 1-based start index of the row.
 * @param end - The 1-based end index of the row.
 * @returns A CSS string for `grid-row`.
 */
export declare let getGridRow: (start: number, end: number) => string;
/**
 * Calculates the `grid-row` CSS property for a resize handle.
 *
 * @param index - The 0-based index of the handle.
 * @returns A CSS string for `grid-row`.
 */
export declare let getGridRowHandle: (index: number) => string;
/**
 * Retrieves the DOM element for a specific column or row index.
 *
 * @param parent - The parent grid element.
 * @param type - The type of track ("col" or "row").
 * @param index - The 1-based index of the track.
 * @returns The matching Element or null.
 */
export declare function getElmAtIndex(parent: HTMLElement, type: "col" | "row", index: number): Element | null;
/**
 * Converts a pixel size to a fraction (`fr`) unit based on the parent container's size.
 *
 * @param sizePx - The size in pixels.
 * @param parent - The parent container element.
 * @param orientation - The orientation of the grid ("vertical" or "horizontal").
 * @returns A string representing the size in `fr` units.
 */
export declare function toPercent(sizePx: number, parent: HTMLElement, orientation: "vertical" | "horizontal"): string;
/**
 * Defines the orientation of the grid.
 */
export type Orientation = "vertical" | "horizontal";
/**
 * Calculates the new state of the grid tracks after a resize operation.
 * Handles constraints (min/max size) and distributes space between adjacent tracks.
 *
 * @param type - The type of track being resized ("col" or "row").
 * @param entries - The current list of track entries.
 * @param movement - The amount of movement in pixels.
 * @param index - The index of the handle being dragged.
 * @param parent - The parent grid element.
 * @param orientation - The orientation of the grid.
 * @returns A new array of `GridEntry` objects with updated sizes.
 */
export declare function getNextState(type: "col" | "row", entries: Array<GridEntry>, movement: number, index: number, parent: HTMLElement, orientation: Orientation): {
    size: string | number;
    mode?: Mode | undefined;
    minSize?: number | undefined;
    maxSize?: number | undefined;
    index: number;
}[];
/**
 * Generates the initial state of the grid based on the provided configuration.
 *
 * @param config - The grid configuration object.
 * @returns The initial `GridState` with columns and rows populated.
 */
export declare function getInitialGridState(config: GridDefaults): GridState;