/// <reference types="node" />
import { Paper } from 'academia/types';
import { Page, ContentStream, Resources } from '../models';
import { Rectangle, Container } from './geometry';
export interface TextSpan extends Rectangle {
    fontName: string;
    fontSize: number;
    fontBold: boolean;
    fontItalic: boolean;
    buffer: Buffer;
    text: string;
}
export declare type Word = Container<TextSpan>;
export declare type Line = Container<Word>;
export declare type Column = Container<Line>;
export declare type Paragraph = Container<Line>;
/**
When we render a page, we specify a ContentStream as well as a Resources
dictionary. That Resources dictionary may contain XObject streams that are
embedded as `Do` operations in the main contents, as well as sub-Resources
in those XObjects.
*/
export declare function renderLayout(outerBounds: Rectangle, contentStreamBuffer: Buffer, resources: Resources, skipMissingCharacters?: boolean): Container<Container<Container<TextSpan>>>[];
export declare function renderLayoutFromPage(page: Page, skipMissingCharacters?: boolean): Container<Container<Container<TextSpan>>>[];
export declare function renderLayoutFromContentStream(contentStream: ContentStream, skipMissingCharacters?: boolean): Container<Container<Container<TextSpan>>>[];
export interface SectionContainer {
    title: Paragraph[];
    paragraphs: Paragraph[];
}
/**
Group a list of lines into sections (title / paragraph sequences)
*/
export declare function groupSections<T extends Rectangle>(paragraphs: Paragraph[], header_fontSize: number): SectionContainer[];
/**
Recombine an array of arbitrary TextSpan Containers into an array of Sections

  each paragraph contains lines
  each line contains word groups
  each word group contains TextSpans
*/
export declare function paperFromParagraphs(paragraphs: Container<Container<Container<TextSpan>>>[]): Paper;