import { ExtensionBase } from './ExtensionBase';
/**
 * Common event for {@link ExtensionsManager}.
 */
export declare class ExtensionEvent extends Event {
    /** Extension instance. */
    readonly ext: ExtensionBase;
    /**
     * @param event - Extension event.
     * @param ext - Extension instance.
     */
    constructor(event: ExtensionEvents, ext: ExtensionBase);
}
/**
 * Base changed extension event for {@link ExtensionsManager}.
 */
export declare class ChangedExtensionBaseEvent extends Event {
    /** Old extension instance. */
    readonly oldExt: ExtensionBase | undefined;
    /** New extension instance. */
    readonly newExt: ExtensionBase | undefined;
    /**
     * @param event - extension event.
     * @param oldExt - Extension instance.
     * @param ext - Extension instance.
     */
    constructor(event: ExtensionEvents, ext: ExtensionBase | undefined, oldExt: ExtensionBase | undefined);
}
/**
 * Changing command extension event for {@link ExtensionsManager}.
 */
export declare class CommandExtensionEvent extends ChangedExtensionBaseEvent {
    constructor(ext: ExtensionBase | undefined, oldExt: ExtensionBase | undefined);
}
/**
 * Event when mode extension has changed for {@link ExtensionsManager}.
 */
export declare class ModeExtensionEvent extends ChangedExtensionBaseEvent {
    constructor(ext: ExtensionBase, oldExt: ExtensionBase | undefined);
}
/**
 * Extension events collection. Events raised by {@link ExtensionsManager}.
 */
export declare enum ExtensionEvents {
    /**Raised when new extension was added to manager. */
    Added = "added",
    /**Raised when controller extension was selected as active. */
    ControllerChanged = "controllerchanged",
    /**Raised when mode extension was selected as active. */
    ModeChanged = "modechanged",
    /**Raised when extension manager was cleared. */
    Cleared = "cleared",
    /**Raised when command extension was changed. */
    CommandChanged = "commandchanged",
    /**Additional event. Manually raised by extension when it`s needed. */
    Updated = "updated"
}