import { ColumnRegular, ColumnTypes, DataType } from '@revolist/revogrid';
/** Snapshot of the RevoGrid properties that the Gantt plugin temporarily owns. */
export interface GanttOriginalGridState {
    /** Row data present before the plugin projected tasks into Gantt rows. */
    readonly source: DataType[];
    /** Column definitions present before the plugin appended the timeline column. */
    readonly columns: ColumnRegular[];
    /** Column type registry present before the plugin registered Gantt/date types. */
    readonly columnTypes: ColumnTypes;
    /** Column resize flag present before the plugin enabled resizing. */
    readonly resize: boolean;
    /** Inline `position` style present before the plugin positioned overlays. */
    readonly inlinePosition: string;
}
/**
 * Capture the grid state that must be restored when the plugin is destroyed.
 *
 * The plugin replaces source rows with projected rows and appends managed
 * columns, so keeping this snapshot avoids leaking Gantt-specific state into
 * the host grid after plugin removal.
 */
export declare function captureOriginalGridState(revogrid: HTMLRevoGridElement): GanttOriginalGridState;
/**
 * Restore the grid properties captured before Gantt initialization.
 *
 * This intentionally restores only the properties owned by the plugin. Custom
 * element properties such as `gantt` and `ganttDependencies` are managed
 * separately because applications may still want to read them after teardown.
 */
export declare function restoreOriginalGridState(revogrid: HTMLRevoGridElement, state: GanttOriginalGridState): void;
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