/**
 * Tab stops of body text (#622): reading their settings and resolving them
 * to px for the measurer (`measure/tabs.ts`). A stop whose position is no
 * length, `'end'` or percentage is left out (`collectConfigWarnings` says
 * so); an unknown `align` reads as `'start'`.
 */
import type { Dimension, TabStop, TabStopAlign, TabStopPosition } from '../types.js';
import { type TabSettings, type TabStopPx } from '../measure/tabs.js';
/** The default room between a leader and the text on either side: the
 *  contents' `leader.gap`. */
export declare const DEFAULT_TAB_LEADER_GAP: Dimension;
export declare function isTabStopAlign(value: unknown): value is TabStopAlign;
/** A length written as text (`120mm`, `3.5cm`, `2em`; a bare number is in
 *  points), or undefined. */
export declare function parseLengthText(text: string): Dimension | undefined;
/** A stop's position as the config (or a `:tab{at=…}`) writes it: a
 *  `Dimension`, `'end'`, a percentage (`'50%'`) or a length as text. */
export declare function parseTabStopPosition(value: unknown): TabStopPosition | undefined;
/** The stop of `:tab{at=… align=… leader=… gap=… decimal=…}` (#622), or
 *  undefined when `at` is missing or no position. */
export declare function tabStopFromAttrs(attrs: Readonly<Record<string, string>>): TabStop | undefined;
/** One stop in px: lengths at `dpi`, `em` of the paragraph's size, the
 *  leader gap at its default, the decimal separator the locale's. Undefined
 *  for a stop whose position is no position. */
export declare function resolveTabStopPx(stop: TabStop, dpi: number, fontSizePx: number, locale: string | undefined): TabStopPx | undefined;
/** A paragraph's tab stops and default interval in px; undefined when it
 *  has neither. */
export declare function resolveTabSettings(stops: readonly TabStop[] | undefined, interval: Dimension | undefined, dpi: number, fontSizePx: number, locale: string | undefined): TabSettings | undefined;
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