import { FlowBlock, Line, Run, TextRun } from './index.js';
export declare function isEmptySdtPlaceholderRun(run: Run): run is TextRun & {
    visualPlaceholder: 'emptyInlineSdt' | 'emptyBlockSdt';
};
export declare function isEmptyInlineSdtPlaceholderRun(run: Run): run is TextRun & {
    visualPlaceholder: 'emptyInlineSdt';
};
/**
 * Expands text runs that contain inline newlines into multiple runs.
 *
 * @param {Run[]} runs - The runs to expand
 * @returns {Run[]} The expanded runs
 */
export declare function expandRunsForInlineNewlines(runs: Run[]): Run[];
/**
 * Extracts the subset of runs that appear in a specific line.
 * Handles partial runs that span multiple lines.
 *
 * @param block - The paragraph block containing the runs
 * @param line - The line to extract runs for
 * @returns Array of runs present in the line
 */
export declare function sliceRunsForLine(block: FlowBlock, line: Line): Run[];
/**
 * Whether a line's text must be painted from measured segment coordinates.
 *
 * Explicit tab coordinates require positioned painting. Horizontally scaled
 * text does as well because browser inline flow cannot preserve the measured
 * advance after `scaleX`. Keeping this decision in the shared contracts layer
 * prevents the resolver and painter from disagreeing about whether paragraph
 * indentation is represented by CSS or by the segments' absolute X values.
 */
export declare function usesPositionedTextGeometry(line: Line, runsForLine: Run[], isRtl: boolean): boolean;