import type{PropertyValues}from'lit';import{type TemplateResult}from'lit';import{LyraElement}from'../../../internal/lyra-element.js';import{type LyraClipboardWriteFailure,type LyraClipboardWriteSuccess}from'../../../internal/clipboard.js';export interface ArtifactVersion{id:string;label?:string;}
/** Which slot is currently visible in `<lr-artifact-panel>`. */
export type ArtifactPanelView='preview'|'code';export interface LyraArtifactPanelEventMap{'lr-view-change':CustomEvent<{view:ArtifactPanelView;}>;'lr-version-change':CustomEvent<{versionId:string;}>;'lr-restore':CustomEvent<{versionId:string;}>;'lr-copy':CustomEvent<LyraClipboardWriteSuccess>;'lr-error':CustomEvent<null>;'lr-copy-error':CustomEvent<LyraClipboardWriteFailure>;'lr-download':CustomEvent<{filename:string;src:string;}>;}
/**
* `<lr-artifact-panel>` — shell around one agent-generated artifact: a
* title/kind header, a preview<->code toggle, version navigation with
* restore, a streaming indicator, and built-in copy/download actions.
* Renders none of the artifact itself — content is slotted. Version ids are stable identities;
* empty/blank ids are omitted and duplicates normalize before navigation, labels, restore actions,
* and counts, first-wins.
*
* Public collection properties take bounded, clone-owned readonly snapshots. Create a new
* collection and reassign it after changes; mutating the assigned array does not update the view.
*
* @customElement lr-artifact-panel
* @event lr-view-change - `detail: { view }`. Fired when the preview/code toggle changes.
* @event lr-version-change - `detail: { versionId }`. Fired when the previous/next
*   navigation moves to a different version.
* @event lr-restore - `detail: { versionId }`. Fired by the restore-this-version button;
*   mutates nothing itself — `versions` and the resulting content stay host-owned state.
* @event lr-copy - `detail: { ok: true, text }`. Fired after the clipboard write fulfills.
* @event lr-error - The clipboard write failed; generic no-detail notification.
* @event lr-copy-error - `detail: { ok: false, text, reason, error }` — typed clipboard failure.
* @event lr-download - `detail: { filename, src }`. Fired with the sanitized download URL.
* @slot - Preview-view content.
* @slot code - Code-view content (typically a `<lr-code-block>`). The preview/code toggle
*   only renders once this slot has assigned content.
* @slot actions - Extra header controls, rendered between the version navigation and the
*   built-in copy/download buttons.
* @csspart base - The root wrapper.
* @csspart header - The header row.
* @csspart label - The artifact title.
* @csspart kind - The kind badge.
* @csspart view-toggle - The preview/code toggle group (rendered only once the `code` slot
*   has content).
* @csspart view-button - One toggle button; carries `data-view="preview"` or `data-view="code"`.
* @csspart version-nav - The version navigation group (rendered only once `versions` is non-empty).
* @csspart version-previous - The previous-version button.
* @csspart version-previous-glyph - The chevron glyph inside `version-previous`, mirrored under RTL.
* @csspart version-next - The next-version button.
* @csspart version-next-glyph - The chevron glyph inside `version-next`, mirrored under RTL.
* @csspart version-position - The "Version N of M" text.
* @csspart version-label - The active `ArtifactVersion.label`, when supplied.
* @csspart restore-button - The restore-this-version button, rendered only while the active
*   version isn't the latest one.
* @csspart actions - The `actions` slot wrapper.
* @csspart copy-button - The copy button, rendered only while `copyText` is non-empty.
* @csspart download-button - The download button, rendered only while `downloadSrc` is non-empty.
* @csspart body - The content body wrapper.
* @csspart streaming-indicator - The streaming state indicator, rendered only while `streaming`.
* @cssprop [--lr-artifact-panel-view-active-bg=var(--lr-color-brand-quiet)] - Background of the
*   pressed (active) preview/code toggle button.
* @cssprop [--lr-artifact-panel-view-active-color=var(--lr-color-brand)] - Text color of the pressed
*   (active) preview/code toggle button. Restyling the pressed state otherwise requires overriding
*   the library-wide brand tokens, since `::part(view-button)[aria-pressed]` is invalid CSS.
* @status stable
* @since 4.0.0
*/
export declare class LyraArtifactPanel extends LyraElement<LyraArtifactPanelEventMap>{protected static readonly ownedCollectionProperties:readonly string[];static styles:import("lit").CSSResultGroup[];
/** The artifact's title, shown in the header. Optional. Omitting it localizes the default
*  `artifactPanelLabel` message for the view-toggle group's accessible name (and shows no
*  visible title); an explicit empty string also renders no visible/accessible label. */
label?:string;
/** A short kind label (e.g. `document`, `code`), shown as a badge next to `label`. */
kind:string;
/** Which slot is currently visible. */
view:ArtifactPanelView;
/** The artifact's version history, oldest first. The last entry is the latest version. Empty/blank
*  ids are omitted and duplicates normalize first-wins before navigation, counts, and events. */
versions:readonly ArtifactVersion[];
/** The currently viewed version's id, or `null` to mean "the latest version". */
activeVersionId:string|null;
/** Whether the artifact is still being generated. Sets `aria-busy` on the body and shows a
*  text indicator instead of an animated one, so it stays legible under reduced motion. */
streaming:boolean;
/** The text copied to the clipboard by the copy button. Empty hides the button. */
copyText:string;
/** The download URL, sanitized through `safeDownloadHref()` before use. Empty hides the button. */
downloadSrc:string;
/** The suggested filename reported in the `lr-download` event detail. */
downloadName:string;private hasCodeSlot;private copyGeneration;private get normalizedVersions();disconnectedCallback():void;protected willUpdate(changed:PropertyValues):void;private onCodeSlotChange;private get accessibleLabel();private setView;private get currentIndex();private goToVersion;private onCopy;private onDownload;render():TemplateResult;
/** `localize()` interpolates with a bare `String(value)`, so a number handed to it renders in
*  ASCII digits no matter the locale -- mixing two numbering systems inside one translated
*  sentence. Route every user-facing number through the effective locale instead. */
private formatCount;}declare global{interface HTMLElementTagNameMap{'lr-artifact-panel':LyraArtifactPanel;}}