import{nothing,type PropertyValues,type TemplateResult}from'lit';import{LyraElement}from'../../../internal/lyra-element.js';import type{LyraHighlightTone,HighlightActivateDetail}from'../document-viewer/anchors.js';export interface HighlightLayerItem{readonly id:string;
/** Finite percent-of-box coordinates (the `region` anchor convention). One item may span
* multiple rects (a quote wrapping lines); invalid coordinates and negative sizes are omitted. */
readonly rects:readonly Readonly<{x:number;y:number;width:number;height:number;}>[];readonly label?:string;readonly tone?:LyraHighlightTone;}export interface LyraHighlightLayerEventMap{'lr-highlight-activate':CustomEvent<HighlightActivateDetail>;}
/**
* `<lr-highlight-layer>` — a presentational overlay that paints highlight rectangles
* (percent-of-box coordinates) over positioned content and owns their activation, active/flash
* styling, and keyboard access. `items` order is the caller's own reading order; the layer does not
* re-sort geometrically. Fills its nearest positioned ancestor. With `interactive=false`, the
* overlay remains pure paint (`aria-hidden`, no group owner or controls). If no item has a valid
* rectangle, the component renders no subtree at all.
*
* @customElement lr-highlight-layer
* @event lr-highlight-activate - A rect was activated (click, or Enter/Space while focused).
*   `detail: { highlightId }`.
* @csspart base - The absolutely-positioned overlay (inset 0).
* @csspart rect - One highlight rectangle (`data-tone`/`data-active`/`data-flash` state attributes).
* @csspart rect-target - Transparent activation geometry around a rectangle, with a minimum
*   pointer/focus area independent of the caller-supplied visual coordinates.
* @csspart highlight-actions - Non-overlapping actions used when more than one logical highlight
*   would otherwise create ambiguous minimum hit areas.
* @csspart highlight-action - One action in the non-overlapping highlight action list.
* @cssprop --lr-highlight-layer-accent-background - Accent highlight background.
* @cssprop --lr-highlight-layer-accent-outline - Accent highlight outline.
* @cssprop --lr-highlight-layer-success-background - Success highlight background.
* @cssprop --lr-highlight-layer-success-outline - Success highlight outline.
* @cssprop --lr-highlight-layer-warning-background - Warning highlight background.
* @cssprop --lr-highlight-layer-warning-outline - Warning highlight outline.
* @cssprop --lr-highlight-layer-danger-background - Danger highlight background.
* @cssprop --lr-highlight-layer-danger-outline - Danger highlight outline.
* @cssprop --lr-highlight-layer-neutral-background - Neutral highlight background.
* @cssprop --lr-highlight-layer-neutral-outline - Neutral highlight outline.
* @cssprop --lr-highlight-layer-flash-background - Flash-state background.
* @status stable
* @since 4.0.0
*/
export declare class LyraHighlightLayer extends LyraElement<LyraHighlightLayerEventMap>{protected static readonly ownedCollectionProperties:readonly string[];static styles:import("lit").CSSResultGroup[];private _items;
/** Highlight records in caller reading order. IDs are trimmed and must be nonempty; the first
* record for an ID is retained and blank or later duplicate records are ignored. */
get items():readonly HighlightLayerItem[];set items(value:readonly HighlightLayerItem[]);
/** Domain identity of the currently active highlight. */
activeHighlightId:string|null;
/** `false` = pure paint: `pointer-events: none`, no tab stop, no role. Default-true, matching
*  markdown's `sanitize` stance. */
interactive:boolean;private focusedItem;private flashingItem;private flashTimer?;private flashTimerWindow?;private flashGeneration;private pendingFocusItem;protected willUpdate(changed:PropertyValues):void;protected updated(changed:PropertyValues):void;disconnectedCallback():void;adoptedCallback():void;
/** Applies a one-shot emphasis flash to the first item matching `id`. Its lifetime follows the
*  rendered animation duration, including theme and reduced-motion overrides. */
flash(id:string):void;private clearFlash;private safeRects;private itemIndexesWithRects;private tabStopIndex;private onRectClick;private onRectFocus;private primaryTarget;private primaryVisualRect;private focusRect;private onRectKeyDown;private rectLabel;render():TemplateResult|typeof nothing;}declare global{interface HTMLElementTagNameMap{'lr-highlight-layer':LyraHighlightLayer;}}