import { utils } from "pixi.js";
import { DBase } from "./d-base";
import { DOnOptions } from "./d-on-options";
import { DView } from "./d-view";
import { EShapeContainer } from "./shape/e-shape-container";
export interface DDiagramSnapshotParent<CANVAS> {
    canvas: CANVAS | null;
    view: DView;
}
export interface DDiagramSnapshotEvents<CANVAS, EMITTER> {
    /**
     * Triggered before taking a snapshot.
     *
     * @param canvas a canvas
     * @param emitter an emitter
     */
    taking(canvas: CANVAS, emitter: EMITTER): void;
    /**
     * Triggered when a snapshot is taken successfully or when failed to take.
     *
     * @param canvas a canvas
     * @param reason Null if succeeded. Otherwise, a string representing a reason why failed.
     * @param emitter an emitter
     */
    took(canvas: CANVAS, reason: string | null, emitter: EMITTER): void;
}
export interface DDiagramSnapshotCanvasSnap {
    container: EShapeContainer;
}
export interface DDiagramSnapshotCanvas extends DBase {
    snap?: DDiagramSnapshotCanvasSnap | null;
}
export interface DDiagramSnapshotOnOptions<CANVAS, EMITTER> extends Partial<DDiagramSnapshotEvents<CANVAS, EMITTER>>, DOnOptions {
}
/**
 * Options to eliminate the snap grid, the snap targets and the canvas background from a snapshot.
 */
export interface DDiagramSnapshotCleanupOptions {
    snap?: boolean;
    background?: boolean;
    reflow?: boolean;
}
export interface DDiagramSnapshotCreateAsUrlOptions {
    size?: number | null;
    cleanup?: boolean | DDiagramSnapshotCleanupOptions;
}
export interface DDiagramSnapshotCreateAsFileOptions {
    size?: number | null;
    filename: string;
    cleanup?: boolean | DDiagramSnapshotCleanupOptions;
}
export interface DDiagramSnapshotCreateOptions<CANVAS, DATA> {
    size?: number | null;
    cleanup?: boolean | DDiagramSnapshotCleanupOptions;
    extractor: (canvas: CANVAS) => DATA;
}
export interface DDiagramSnapshotOptions<CANVAS, EMITTER = any> {
    on?: DDiagramSnapshotOnOptions<CANVAS, EMITTER>;
}
export declare class DDiagramSnapshot<CANVAS extends DDiagramSnapshotCanvas = DDiagramSnapshotCanvas> extends utils.EventEmitter {
    protected _parent: DDiagramSnapshotParent<CANVAS>;
    constructor(parent: DDiagramSnapshotParent<CANVAS>, options?: DDiagramSnapshotOptions<CANVAS>);
    /**
     * Creates a snapshot.
     *
     * @param size a maximum image size
     * @returns an URL of a created image or undefined
     */
    createAsUrl(size?: number | null): string | undefined;
    /**
     * Creates a snapshot.
     *
     * @param options options
     * @returns an URL of a created image or undefined
     */
    createAsUrl(options: DDiagramSnapshotCreateAsUrlOptions): string | undefined;
    /**
     * Creates and downloads a snapshot.
     *
     * @param filename a filename
     */
    createAsFile(filename: string): void;
    /**
     * Creates and downloads a snapshot.
     *
     * @param size a maximum image size
     * @param filename a filename
     */
    createAsFile(size: number | null, filename: string): void;
    /**
     * Creates and downloads a snapshot.
     *
     * @param options options
     */
    createAsFile(options: DDiagramSnapshotCreateAsFileOptions): void;
    protected toScale(size: number | null | undefined, canvas: CANVAS): number;
    protected toCleanupSnap(options?: DDiagramSnapshotCreateOptions<CANVAS, unknown>): boolean;
    protected toCleanupBackground(options?: DDiagramSnapshotCreateOptions<CANVAS, unknown>): boolean;
    protected toCleanupReflow(options?: DDiagramSnapshotCreateOptions<CANVAS, unknown>): boolean;
    create<DATA>(options: DDiagramSnapshotCreateOptions<CANVAS, DATA>): DATA | undefined;
}