export type PaneType = 'bottomRight' | 'topRight' | 'bottomLeft' | 'topLeft';
export type PaneState = 'split' | 'frozen' | 'frozenSplit';
export type SheetViewMode = 'normal' | 'pageBreakPreview' | 'pageLayout';
export interface Pane {
    /** Column-axis split. Number of columns frozen on the left. */
    xSplit?: number;
    /** Row-axis split. Number of rows frozen on top. */
    ySplit?: number;
    /** First visible cell of the bottom-right pane. */
    topLeftCell?: string;
    /** Which pane is active when the sheet is opened. Defaults to `bottomRight` for full freezes. */
    activePane?: PaneType;
    state: PaneState;
}
export interface Selection {
    pane?: PaneType;
    activeCell?: string;
    sqref?: string;
}
export interface SheetView {
    /** Index into the parent workbook's bookViews list. Defaults to 0. */
    workbookViewId: number;
    tabSelected?: boolean;
    showGridLines?: boolean;
    showRowColHeaders?: boolean;
    showFormulas?: boolean;
    showZeros?: boolean;
    rightToLeft?: boolean;
    view?: SheetViewMode;
    topLeftCell?: string;
    zoomScale?: number;
    zoomScaleNormal?: number;
    pane?: Pane;
    selection?: Selection;
}
/** Build a SheetView with sensible defaults. */
export declare function makeSheetView(opts?: Partial<SheetView>): SheetView;
/**
 * Build a frozen Pane from a top-left coordinate. Per Excel semantics:
 * - "B2" → freeze 1 row + 1 col → xSplit=1, ySplit=1, activePane='bottomRight'
 * - "A2" → freeze 1 row only → ySplit=1, activePane='bottomLeft'
 * - "B1" → freeze 1 col only → xSplit=1, activePane='topRight'
 * - "A1" → no freeze; throws (caller should clear `ws.views[].pane`).
 */
export declare function makeFreezePane(topLeftRef: string): Pane;
/** Inverse of {@link makeFreezePane}. Returns the top-left ref of the bottomRight pane, or undefined. */
export declare function freezePaneRef(view: SheetView): string | undefined;