import type { PlatformView, PlatformWindow, WindowingPort } from "../platform/ports";
import type { ViewCreationOptions, ViewInfo } from "./types";
/**
 * Check if a WebContentsView exists and is valid.
 */
export declare function isValidView(view?: PlatformView): view is PlatformView;
/**
 * Check if a WebContentsView's webContents is still alive (not destroyed).
 */
export declare function isViewAlive(view?: PlatformView): boolean;
/**
 * Check if a BrowserWindow exists and is not destroyed.
 */
export declare function isWindowAlive(window?: PlatformWindow | null): window is PlatformWindow;
/**
 * Get a view from the map with validation.
 * Throws an error if view is not found or destroyed.
 */
export declare function requireView(viewId: number, views: Map<number, ViewInfo>): ViewInfo;
/**
 * Get a view by app ID from the map, returning the first matching view.
 * Throws an error if view is not found or destroyed.
 */
export declare function requireViewByAppId(appId: string, views: Map<number, ViewInfo>): {
    viewId: number;
    viewInfo: ViewInfo;
};
/**
 * Create a new WebContentsView with standard options.
 */
export declare function createView(options: ViewCreationOptions, windows: WindowingPort): PlatformView;
/**
 * Safely destroy a view and remove it from the main window.
 */
export declare function destroyView(viewInfo: ViewInfo, mainWindow: PlatformWindow | null): void;
/**
 * Remove all destroyed views from a view map.
 * Returns the number of views cleaned up.
 */
export declare function cleanupDestroyedViews(views: Map<number, ViewInfo>): number;
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