export interface AxisLabelFit {
    min: number;
    /** Half a label. */
    lean: number;
}
/**
 * Read off the widest label the axis would print, at `xs`: 50px fits `Jan` but not `15 thg 9`. Two
 * numbers because end labels are anchored on the edges (`line_chart.css`) and each leans half a
 * label inward; one folded number thins a narrow card to one label.
 */
export declare function axisLabelFit(labels: readonly string[], gutter?: number): AxisLabelFit;
/**
 * Exported because a slot geometry needs it twice — to pick labels and to widen a survivor — and
 * deriving it again drifts. The floor is one label: forcing a second onto a track that fits one
 * overlaps them.
 */
export declare function axisLabelStep(count: number, chartWidth: number, minLabelWidth?: number): number;
/**
 * Empty only when `count <= 0`: an axis with positions always prints the last one. Whether the
 * track is measured is the caller's fact, since a host with no layout pass reports 0 like a 0px
 * track; one value meaning both once erased a narrow card's label row.
 */
export declare function axisLabelIndices(count: number, chartWidth: number, minLabelWidth?: number, 
/**
 * Zero is a slot geometry; above zero a point geometry, spanning the track by the gaps between
 * labels.
 */
lean?: number): number[];