import { Line, NeutralLineGeometry, ParagraphBlock, TextRun } from '../../contracts/src/index.js';
import { FontMeasureContext } from '../../../shared/font-system/src/index.js';
export interface MeasuredVisualBidiCell {
    readonly from: number;
    readonly to: number;
    readonly left: number;
    readonly right: number;
    readonly rtl: boolean;
}
/** Private measured data; source offsets stay in the line's logical UTF-16 space. */
export interface MeasuredVisualBidiLine {
    readonly geometry: NeutralLineGeometry;
    readonly cells: readonly MeasuredVisualBidiCell[];
    readonly length: number;
}
/** This certificate deliberately excludes shaping classes not covered by the native proof. */
export declare function canMeasureVisualBidi(block: ParagraphBlock): block is ParagraphBlock & {
    runs: [TextRun];
};
interface VisualBidiLineInput {
    block: ParagraphBlock;
    line: Line;
    geometry: NeutralLineGeometry;
    availableWidth: number;
    fontContext: FontMeasureContext;
    ownerCurrent?: () => boolean;
}
/** Same measured line, source paragraph and font generation as the captured neutral candidate. */
export declare function measureVisualBidiLine(input: VisualBidiLineInput): MeasuredVisualBidiLine | null;
export declare function isMeasuredVisualBidiLineCurrent(line: MeasuredVisualBidiLine, fontContext?: FontMeasureContext): boolean;
export declare function measuredVisualBidiCaretX(line: MeasuredVisualBidiLine, offset: number, affinity?: 'before' | 'after' | 'inside'): number | null;
export declare function measuredVisualBidiOffsetAtX(line: MeasuredVisualBidiLine, x: number): number | null;
export declare function measuredVisualBidiRangeBands(line: MeasuredVisualBidiLine, from: number, to: number): {
    left: number;
    right: number;
}[];
export {};