import{type PropertyValues,type TemplateResult}from'lit';import{LyraElement}from'../../../internal/lyra-element.js';import type{LyraOrientation}from'../../../internal/shared-unions.js';export interface LyraScrollerEventMap{'lr-scroll':CustomEvent<{scrollStart:boolean;scrollEnd:boolean;scrollLeft:number;scrollTop:number;}>;}
/**
* `<lr-scroller>` — a responsive overflow surface with optional previous
* and next controls. Content remains in the default slot, so cards, tabs, and
* any consumer-owned interactive elements retain their own semantics.
*
* @customElement lr-scroller
* @slot - Scrollable content.
* @event lr-scroll - `detail: { scrollStart: boolean; scrollEnd: boolean; scrollLeft: number;
*   scrollTop: number }` reports the scroll position and available edges. Scroll-driven emissions
*   are coalesced through one `requestAnimationFrame` tick, so a fling that fires dozens of native
*   `scroll` events produces at most one of these per frame.
* @csspart base - The overall scroller layout.
* @csspart viewport - The native scroll container.
* @csspart content - The slotted content wrapper.
* @csspart start-shadow - Logical-start overflow cue.
* @csspart end-shadow - Logical-end overflow cue.
* @csspart previous - The previous/start control.
* @csspart next - The next/end control.
* @csspart control - Shared part on both `previous` and `next`.
* @csspart previous-glyph - The chevron glyph inside `previous`, mirrored under RTL.
* @csspart next-glyph - The chevron glyph inside `next`, mirrored under RTL.
* @cssprop [--lr-scroller-control-size=var(--lr-size-2rem)] - Control size.
* @cssprop [--lr-scroller-min-block-size=var(--lr-size-10rem)] - Minimum vertical scroller size.
* @cssprop [--shadow-color=var(--lr-color-surface)] - Base color of each edge shadow.
* @cssprop [--shadow-size=var(--lr-size-2rem)] - Inline/block extent of each edge shadow.
* @cssprop [--lr-scroller-shadow-color=var(--shadow-color)] - Lyra-prefixed shadow-color alias.
* @cssprop [--lr-scroller-shadow-size=var(--shadow-size)] - Lyra-prefixed shadow-size alias.
* @cssprop [--lr-scroller-hover-outline-width=var(--lr-border-width-thin)] - Outline width of the
*   mouse-hover preview on `[part="viewport"]`.
* @cssprop [--lr-scroller-hover-outline-style=solid] - Outline style of the mouse-hover preview on
*   `[part="viewport"]`.
* @cssprop [--lr-scroller-hover-outline-color=var(--lr-color-border)] - Outline color of the
*   mouse-hover preview on `[part="viewport"]`. Set to `transparent` to opt out of the hover
*   treatment entirely.
* @cssprop [--lr-scroller-hover-outline-offset=var(--lr-focus-ring-offset)] - Offset of the
*   mouse-hover preview on `[part="viewport"]`.
* @status stable
* @since 4.0.0
*/
export declare class LyraScroller extends LyraElement<LyraScrollerEventMap>{static styles:import("lit").CSSResultGroup[];orientation:LyraOrientation;controls:boolean;
/** Hides the native scrollbar while preserving scrolling. */
withoutScrollbar:boolean;
/** Removes both visual edge cues while leaving native scrolling untouched. */
withoutShadow:boolean;scrollStep:number;label:string;private canScrollStart;private canScrollEnd;private measured;private viewport?;private content?;private resizeObserver?;private resizeObserverDocument?;private ownerRealmGeneration;connectedCallback():void;firstUpdated(changed:PropertyValues):void;disconnectedCallback():void;adoptedCallback():void;private armResizeObserver;private resetOwnerRealmWork;private scheduleEdgeUpdate;protected updated(changed:PropertyValues):void;private edgeDetail;private updateEdges;private syncEdges;private scrollFrame?;private scrollFrameWindow?;private cancelScrollFrame;private onScroll;private onSlotChange;
/** `scrollStep` normalized to a finite, non-negative override amount before
*  `scrollByDirection()`'s `> 0` gate below -- only a positive value overrides the
*  viewport-percentage-based default there; zero, negative, or non-finite already falls through
*  to that default via the comparison, so this just makes the normalization explicit instead of
*  relying on incidental NaN/negative comparison semantics. */
private get safeScrollStep();private scrollByDirection;private scrollToEdge;render():TemplateResult;}declare global{interface HTMLElementTagNameMap{'lr-scroller':LyraScroller;}}