import * as _angular_core from '@angular/core';

/** Granularity of the split. `lines` is not yet supported in this port. */
type WrSplitTextUnit = 'chars' | 'words';
/**
 * One end of the animation. Properties not listed default to the steady
 * state (opacity 1, no transform). `x` / `y` are pixels, `scale` is a
 * unitless factor, `rotate` is degrees.
 */
interface WrSplitTextMotion {
    readonly opacity?: number;
    readonly x?: number;
    readonly y?: number;
    readonly scale?: number;
    readonly rotate?: number;
}

type Piece = {
    readonly kind: 'piece';
    readonly text: string;
} | {
    readonly kind: 'space';
    readonly text: string;
};
/**
 * Animated text reveal — splits the input string into chars or words and
 * staggers each piece in from a `from` motion state to a `to` motion
 * state when the host scrolls into view. Whitespace is preserved.
 *
 * @example
 * ```html
 * <wr-split-text
 *   text="Hello, ngwr!"
 *   splitType="chars"
 *   [delay]="40"
 *   [duration]="1.2"
 *   [from]="{ opacity: 0, y: 40 }"
 *   [to]="{ opacity: 1, y: 0 }"
 *   (animationComplete)="onDone()"
 * />
 * ```
 *
 * @see https://www.reactbits.dev/text-animations/split-text
 */
declare class WrSplitText {
    /** Text to animate. Required. */
    readonly text: _angular_core.InputSignal<string>;
    /** Split granularity. @default 'chars' */
    readonly splitType: _angular_core.InputSignal<WrSplitTextUnit>;
    /** Stagger delay between pieces in ms. @default 50 */
    readonly delay: _angular_core.InputSignalWithTransform<number, unknown>;
    /** Animation duration in seconds (matches reactbits' API). @default 1.25 */
    readonly duration: _angular_core.InputSignalWithTransform<number, unknown>;
    /** CSS easing function. @default 'cubic-bezier(0.16, 1, 0.3, 1)' (~power3.out) */
    readonly easing: _angular_core.InputSignal<string>;
    /** Start state for each piece. @default { opacity: 0, y: 40 } */
    readonly from: _angular_core.InputSignal<WrSplitTextMotion>;
    /** End state for each piece. @default { opacity: 1, y: 0 } */
    readonly to: _angular_core.InputSignal<WrSplitTextMotion>;
    /** `IntersectionObserver.threshold` — 0..1. @default 0.1 */
    readonly threshold: _angular_core.InputSignalWithTransform<number, unknown>;
    /** `IntersectionObserver.rootMargin`. @default '-100px' */
    readonly rootMargin: _angular_core.InputSignal<string>;
    /** Text alignment of the host. @default 'center' */
    readonly textAlign: _angular_core.InputSignal<"left" | "center" | "right" | "justify">;
    /** Emitted once all pieces finish animating. */
    readonly animationComplete: _angular_core.OutputEmitterRef<void>;
    /** Pieces to render. Each piece is `{ kind: 'piece', text }` or `{ kind: 'space' }`. */
    protected readonly pieces: _angular_core.Signal<readonly Piece[]>;
    private readonly host;
    private readonly destroyRef;
    private readonly isBrowser;
    private readonly platform;
    private hasAnimated;
    constructor();
    private startObserver;
    private animate;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<WrSplitText, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<WrSplitText, "wr-split-text", never, { "text": { "alias": "text"; "required": true; "isSignal": true; }; "splitType": { "alias": "splitType"; "required": false; "isSignal": true; }; "delay": { "alias": "delay"; "required": false; "isSignal": true; }; "duration": { "alias": "duration"; "required": false; "isSignal": true; }; "easing": { "alias": "easing"; "required": false; "isSignal": true; }; "from": { "alias": "from"; "required": false; "isSignal": true; }; "to": { "alias": "to"; "required": false; "isSignal": true; }; "threshold": { "alias": "threshold"; "required": false; "isSignal": true; }; "rootMargin": { "alias": "rootMargin"; "required": false; "isSignal": true; }; "textAlign": { "alias": "textAlign"; "required": false; "isSignal": true; }; }, { "animationComplete": "animationComplete"; }, never, never, true, never>;
}

export { WrSplitText };
export type { WrSplitTextMotion, WrSplitTextUnit };