import type { VDTLine, VDTLineSegment } from '../vdt.js';
import type { TextAlign } from '../types.js';
import { type MeasuredBlock, type MeasureBlockOptions } from './types.js';
/**
 * Whether a Knuth–Plass line runs past its measure even with its spaces
 * removed: a word wider than the whole line has no feasible break around
 * it, and the search then sets it — with everything before it back to the
 * last feasible break — on one overfull line. A ragged line's spaces do not
 * shrink (`rigidSpaces`): they count.
 */
export declare function hasOverfullLine(lines: VDTLine[], lineWidth: (lineIndex: number) => number, rigidSpaces?: boolean): boolean;
/** The painted word-space ratio of a justified line that is not the last
 *  (`VDTLine.justifiedSpaceRatio`); the breakers call `justifiedSpaceRatios`,
 *  which gives the ratio the limits bound too (#704). */
export declare function computeJustifiedSpaceRatio(segments: VDTLineSegment[], lineMaxWidth: number, normalSpaceWidth: number, textAlign: TextAlign, isLastLine: boolean): number | undefined;
/**
 * Measure a text block: break it into lines within maxWidthPx
 * and return VDTLine data with bounding boxes.
 *
 * The returned lines have bbox positions relative to the block origin (0,0).
 * The pipeline will offset them to absolute page coordinates later.
 */
export declare function measureBlock(text: string, font: string, maxWidthPx: number, lineHeightPx: number, options?: MeasureBlockOptions): MeasuredBlock;
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