import { PDFFont } from 'pdf-lib';
import { BoxEdges } from './box.js';
import { Color } from './colors.js';
import { Alignment } from './content.js';
import { Font } from './fonts.js';
import { GraphicsObject } from './graphics.js';
import { Obj } from './types.js';
export declare type TextSegment = {
    text: string;
    width: number;
    height: number;
    lineHeight: number;
    font: PDFFont;
    fontSize: number;
    color?: Color;
    link?: string;
};
/**
 * A range of text with attributes, similar to a `<span>` in HTML.
 */
export declare type TextSpan = {
    text: string;
    attrs: TextAttrs;
};
export declare type Block = Columns | Rows | Paragraph;
export declare type Columns = {
    columns: Block[];
} & BlockAttrs;
export declare type Rows = {
    rows: Block[];
} & BlockAttrs;
export declare type ImageBlock = {
    image?: string;
    padding?: BoxEdges;
} & BlockAttrs;
export declare type Paragraph = {
    text?: TextSpan[];
    graphics?: GraphicsObject[];
    padding?: BoxEdges;
} & BlockAttrs & InheritableAttrs;
export declare type TextAttrs = {
    fontFamily?: string;
    fontSize?: number;
    lineHeight?: number;
    bold?: boolean;
    italic?: boolean;
    color?: Color;
    link?: string;
};
declare type BlockAttrs = {
    margin?: BoxEdges;
    width?: number;
    height?: number;
    id?: string;
};
declare type InheritableAttrs = TextAttrs & {
    textAlign?: Alignment;
};
export declare function parseContent(content: unknown[], defaultStyle: InheritableAttrs): Paragraph[];
export declare function parseBlock(input: Obj, defaultAttrs?: InheritableAttrs): Block;
export declare function parseColumns(input: Obj, defaultAttrs?: InheritableAttrs): Columns;
export declare function parseRows(input: Obj, defaultAttrs?: InheritableAttrs): Columns;
export declare function parseParagraph(input: Obj, defaultAttrs?: InheritableAttrs): Paragraph;
export declare function parseTextAttrs(input: Obj): TextAttrs;
export declare function parseInheritableAttrs(input: Obj): TextAttrs;
export declare function parseText(text: unknown, attrs: TextAttrs): TextSpan[];
export declare function extractTextSegments(textSpans: TextSpan[], fonts: Font[]): TextSegment[];
/**
 * Split the given text into chunks of subsequent whitespace (`\s`) and non-whitespace (`\S`)
 * characters. For example, the string `foo bar` would be split into `['foo', ' ', 'bar']`.
 * Newlines (`\n`) are preserved, each in a chunk of its own. Any whitespace that surrounds
 * newlines is removed.
 *
 * @param text The input string
 * @returns an array of chunks
 */
export declare function splitChunks(text: string): string[];
export declare function breakLine(segments: TextSegment[], maxWidth: number): TextSegment[][];
/**
 * Finds the next appropriate segment that allows for a linebreak, starting at the given index, and
 * returns its index.
 *
 * @param segments A list of text segments.
 * @param index The index of the element to start at.
 * @returns The index of the next segment that allows for linebreak if found, `undefined` otherwise.
 */
export declare function findLinebreakOpportunity(segments: TextSegment[], index: number): number | undefined;
/**
 * Flatten a list of text segments by merging subsequent segments that have identical text
 * attributes.
 *
 * @param segments a list of text segments
 * @returns a possibly shorter list of text segments
 */
export declare function flattenTextSegments(segments: TextSegment[]): TextSegment[];
export {};