import type * as d3T from "d3";
interface ChooChooVariables {
    toExtend: Set<number[]>;
    currentStartSymbolName: string;
}
interface LZString {
    decompressFromBase64: (input: string) => string;
}
interface Window extends globalThis.Window {
    chooChoo: ChooChooVariables;
    generateDiagram: () => void;
    handleGenerateDiagram: () => void;
    handleStartSymbolSelection: () => void;
    onCollapseAll: () => void;
    onExpandAll: () => void;
    updateSvgViewBoxSize: () => void;
    exportSvg: () => void;
    exportPng: () => void;
    LZString?: LZString;
}
/**
 * Installs provided functions into `window`, initializes global variables and adds listeners.
 *
 * Provided functions:
 * - `generateDiagram` - Generate the diagram from the entered grammar.
 * - `handleGenerateDiagram` - Handle the generation of a diagram from the entered grammar.
 * - `handleStartSymbolSelection` - Handle the selection of a new start symbol.
 * - `onCollapseAll` - Handle the collapse of all non-terminal-symbols.
 * - `onExpandAll` - Handle the expansion of all non-terminal-symbols.
 * - `exportSvg ` - Export the diagram as an SVG file.
 * - `exportPng` - Export the diagram as a PNG file.
 *
 * Provided global variables:
 * - `chooChoo` - Holds all necessary objects for this package.
 *
 * Expected DOM elements:
 * - `error_message` - Container for error messages.
 * - `visualized-ebnf` - Container for the diagram.
 * - `ebnf_grammar` - Textarea for the EBNF grammar.
 * - `.start-symbol-drop-down` - Container for the start symbol dropdown.
 * - `start-symbol` - Select for the start symbol.
 * @param {Window} window The window object to install the functions into.
 * @param {typeof d3} d3Param The d3 to use. Must be imported in the main script and passed here.
 */
export declare function install(window: Window, d3Param?: typeof d3T): void;
/**
 * Checks if a word starts with an uppercase letter.
 *
 * Because of course TS/JS doesn't have a built-in function for that.
 * @param word The word to check.
 * @returns `true` if the word starts with an uppercase letter, `false` otherwise.
 */
export declare function isUppercase(word: string): boolean;
/**
 * Get the values of the grammar and expand paths from a URL.
 * The counterpart to `addValuesToUrl`.
 * @param {string} searchParams The search parameters of the URL
 * @returns The grammar, expanded paths and start symbol name
 */
export declare function getValuesFromUrl(searchParams: string): Promise<[string, Set<number[]>, string]>;
/**
 * Export the diagram as an SVG file.
 * @param {Set<number[]>} toExpand The paths to expand, if not provided the current paths are used
 */
export declare function exportSvg(toExpand?: Set<number[]>): Promise<void>;
/**
 * Export the diagram as a PNG file.
 * @param {Set<number[]>} toExpand The paths to expand, if not provided the current paths are used
 */
export declare function exportPng(toExpand?: Set<number[]>): Promise<void>;
export {};