import { EditorPlugin, Editor, PluginEvent, FormatState } from 'roosterjs';
import { Observable } from 'rxjs';
export declare class FormatStateObservable extends Observable<FormatState> implements EditorPlugin {
    private _subject;
    private _contentChangeSubject;
    private editor;
    getContentObservable(): Observable<string>;
    constructor();
    initialize(editor: Editor): void;
    getName(): string;
    dispose(): void;
    onPluginEvent?(event: PluginEvent): void;
    private getContent;
    private getFormatState;
}