import type { CandidateEvaluationResult, ExpandedThemeOverride, OverrideDiagnostic, ParsedThemeOverride, Preset, SelectionId, ThemeOverride, ThemeOverrideEditorDraft, ThemeOverrideEditorRuntime } from './types';
export type EvaluateThemeOverrideDraftResult = {
    readonly valid: true;
    readonly override: ThemeOverride;
    readonly parsed: ParsedThemeOverride;
    readonly expanded: ExpandedThemeOverride;
    readonly diagnostics: readonly OverrideDiagnostic[];
} | {
    readonly valid: false;
    readonly diagnostics: readonly OverrideDiagnostic[];
};
export type PreviewThemeOverrideDraftResult<TSession> = {
    readonly applied: true;
    readonly draft: ThemeOverrideEditorDraft;
    readonly session: TSession;
    readonly expanded: ExpandedThemeOverride;
    readonly override: ThemeOverride;
} | {
    readonly applied: false;
    readonly draft: ThemeOverrideEditorDraft;
    readonly session: TSession;
    readonly diagnostics: readonly OverrideDiagnostic[];
};
export declare function evaluateThemeOverrideDraft<TSession>(draft: ThemeOverrideEditorDraft, runtime: ThemeOverrideEditorRuntime<TSession>): EvaluateThemeOverrideDraftResult;
export declare function previewThemeOverrideDraft<TSession>(draft: ThemeOverrideEditorDraft, session: TSession, runtime: ThemeOverrideEditorRuntime<TSession>): PreviewThemeOverrideDraftResult<TSession>;
export declare function evaluateThemeOverrideCandidate<TSession>(draft: ThemeOverrideEditorDraft, selectionId: SelectionId, candidate: unknown, runtime: ThemeOverrideEditorRuntime<TSession>): CandidateEvaluationResult;
export declare function validateDisplayFontForPreset(draft: ThemeOverrideEditorDraft, allowedFonts: Readonly<Record<Preset, readonly string[]>>): readonly OverrideDiagnostic[];
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