import type { ChartConfig } from '@/types/chart';
/**
 * Position and visibility information for a chart placeholder
 */
export interface ChartPlaceholderInfo {
    chartId: string;
    rect: DOMRect | null;
    isVisible: boolean;
    config: ChartConfig | null;
    isLoading: boolean;
}
/**
 * Singleton manager for portal-based chart rendering.
 * Coordinates between inline placeholders and portal-rendered charts.
 * Uses SolidJS signals to manage state outside the streaming reactive flow.
 */
declare class ChartPortalManager {
    private placeholderInfoMap;
    private chartRegistrySignal;
    private renderedChartIds;
    private updateScheduled;
    private lastUpdateTime;
    constructor();
    /**
     * Get the signal accessor for chart registry
     */
    getChartRegistry(): import("solid-js").Accessor<Map<string, ChartPlaceholderInfo>>;
    /**
     * Register a chart placeholder
     */
    registerPlaceholder(chartId: string, isLoading?: boolean): void;
    /**
     * Update placeholder position and visibility
     * Uses throttling to prevent excessive signal updates during scroll
     */
    updatePlaceholderPosition(chartId: string, rect: DOMRect | null, isVisible: boolean): void;
    /**
     * Schedule a throttled signal update
     */
    private scheduleUpdate;
    /**
     * Perform the actual signal update
     */
    private performUpdate;
    /**
     * Set chart config when data is complete
     */
    setChartConfig(chartId: string, config: ChartConfig): void;
    /**
     * Check if a chart has already been rendered
     */
    isChartRendered(chartId: string): boolean;
    /**
     * Mark a chart as rendered
     */
    markChartRendered(chartId: string): void;
    /**
     * Unregister a chart placeholder
     */
    unregisterPlaceholder(chartId: string): void;
    /**
     * Get placeholder info
     */
    getPlaceholderInfo(chartId: string): ChartPlaceholderInfo | undefined;
    /**
     * Clear all placeholders
     */
    clearAll(): void;
    /**
     * Notify signal subscribers of update
     */
    private notifyUpdate;
}
export declare const chartPortalManager: ChartPortalManager;
export {};
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