import type { ToolWidgetStatus } from './toolWidgetUtils';
/**
 * SVG artifacts need an HTML shell. Trust an explicit `type` arg; sniff the
 * markup only when the type is missing.
 */
export declare function isSvgArtifact(type: string | undefined, source: string): boolean;
/**
 * Wrap artifact markup in the host-controlled preview document (CSP first,
 * theme vars + Tailwind for HTML, minimal centering shell for SVG). The result
 * must ONLY ever be rendered inside the sandboxed artifact WebView.
 */
export declare function buildArtifactPreviewHtml(markup: string, { isDark, isSvg }: {
    isDark: boolean;
    isSvg?: boolean;
}): string;
/** Live preview only for settled successful artifacts with content. */
export declare function canPreviewArtifact(status: ToolWidgetStatus, source: string | null | undefined): boolean;
/**
 * Whether a recorded WebView load failure still applies. Failures are keyed
 * to the markup that failed (mirroring the per-html navigation guard), so a
 * later `client_artifact` update on the same tool call gets a fresh render
 * attempt instead of a permanently dead preview.
 */
export declare function previewFailureApplies(failedSource: string | null, currentSource: string | null | undefined): boolean;
/**
 * Per-WebView, platform-aware `onShouldStartLoadWithRequest` guard (pass
 * `Platform.OS`). iOS: exactly one admission — the first callback, and only
 * when it is the initial inline document reported as `about:blank`. Android
 * (and any other platform): the initial load never consults the guard, so
 * every callback is already artifact-initiated and the guard starts CLOSED —
 * a platform-blind single admission would let scripted
 * `window.location = 'about:blank'` mint a CSP-less document there. Once
 * closed, everything is blocked: http(s), file, custom schemes, `data:`
 * documents, `about:` re-navs — any of which would produce a document
 * without our CSP shell, escaping `connect-src 'none'`.
 */
export declare function createArtifactNavigationGuard(platform: string): (url: string) => boolean;
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