import type { VDTLine } from './vdt.js';
/**
 * The tracking a flow line's measured width carries after its last glyph:
 * `tracking` (the block's `letterSpacing` plus the line's) when the line
 * ends on text, else 0. Canvas, CSS and PDF add tracking after every
 * character, the last one included; that last share is advance, not ink,
 * so a centred or right-aligned line leaves it out, as design text does
 * (EF-153). A line that ends on a formula, a chip, a swatch or a space
 * keeps its width as it is.
 */
export declare function lineTrailingTracking(line: VDTLine, tracking: number): number;
/**
 * The advance a line is aligned on and what it hangs past it: `width` is
 * the sum of its segments' widths less the hung marks
 * (`VDTLineSegment.hangs`, `cjk.hangingPunctuation`) and less the
 * trailing tracking (see {@link lineTrailingTracking}); `hang` is the
 * advance of the hung marks after it. Centred and right-aligned lines are
 * placed on `width`, and the column clip grows by `hang`. A line without
 * segments is `bbox.width` wide.
 */
export declare function lineInkExtent(line: VDTLine, tracking: number): {
    width: number;
    hang: number;
};
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