import { JupyterFrontEndPlugin } from '@jupyterlab/application';
import { CodeEditor } from '@jupyterlab/codeeditor';
import { IDocumentWidget } from '@jupyterlab/docregistry';
import { Signal } from '@lumino/signaling';
import { WidgetAdapter } from '../adapters/adapter';
import { IEditorName } from '../feature';
import { IEditorPosition, IRootPosition, ISourcePosition, IVirtualPosition } from '../positioning';
import { ILSPVirtualEditorManager, IVirtualEditorType } from '../tokens';
import { VirtualDocument } from './document';
import IEditor = CodeEditor.IEditor;
export interface IWindowCoordinates {
    /**
     * The number of pixels away from the left edge of the window.
     */
    left: number;
    /**
     * The number of pixels away from the top edge of the window.
     */
    top: number;
}
/**
 * This is based on CodeMirror.EditorChange
 */
export interface IEditorChange {
    /** Position (in the pre-change coordinate system) where the change started. */
    from: ISourcePosition;
    /** Position (in the pre-change coordinate system) where the change ended. */
    to: ISourcePosition;
    /** Array of strings representing the text that replaced the changed range (split by line). */
    text: string[];
    /**  Text that used to be between from and to, which is overwritten by this change. */
    removed?: string[];
    /**  String representing the origin of the change event and whether it can be merged with history */
    origin?: string;
}
/**
 * A virtual editor represents an abstraction of a single editor,
 * even when it aggregates multiple underlying editors. It is not
 * concerned with how the editors are presented (e.g. as cells or
 * tiles) but should be able to pass on the responsibilities to the
 * appropriate editor transparently, so that the features do not
 * need to know about existence of multiple editors.
 */
export interface IVirtualEditor<T extends IEditor> {
    /**
     * The root (outermost, with no parent) virtual document
     * representing the underlying document. While it is NOT
     * being created by the virtual editor (but passed into
     * the constructor), the instance stored there is the
     * reference for all other objects.
     */
    virtual_document: VirtualDocument;
    /**
     * A signal which will be emitted after each change in the
     * value of any of the underlying editors
     */
    change: Signal<IVirtualEditor<T>, IEditorChange>;
    /**
     * The editor name that will be used by feature-integration layer
     * to identify this virtual editor.
     */
    readonly editor_name: IEditorName;
    /**
     * Remove all handlers, signal connections and dispose any other objects
     * created by the virtual editor.
     */
    dispose(): void;
    /**
     * Get the innermost virtual document present at given root position.
     */
    document_at_root_position(position: IRootPosition): VirtualDocument;
    /**
     * Transform a root position to a position relative to the innermost virtual document
     * corresponding to the same character.
     */
    root_position_to_virtual_position(position: IRootPosition): IVirtualPosition;
    /**
     * Retrieve a position the text cursor would have if it
     * was placed at given window coordinates (screen pixels).
     */
    window_coords_to_root_position(coordinates: IWindowCoordinates): IRootPosition | null;
    /**
     * Get the token at given root source position.
     */
    get_token_at(position: IRootPosition): CodeEditor.IToken;
    /**
     * Get the position of the active text cursor in terms of the
     * root position. If each editor has a separate cursor,
     * the cursor of the active editor should be returned.
     */
    get_cursor_position(): IRootPosition;
    /**
     * Transform the position within an editor to a root position.
     */
    transform_from_editor_to_root(ce_editor: T, position: IEditorPosition): IRootPosition | null;
    /**
     * Get the text from the model of the editor.
     */
    get_editor_value(editor: T): string;
}
export declare namespace IVirtualEditor {
    interface IOptions {
        adapter: WidgetAdapter<IDocumentWidget>;
        virtual_document: VirtualDocument;
    }
    type Constructor = {
        new (options: IVirtualEditor.IOptions): IVirtualEditor<any>;
    };
}
export declare class VirtualEditorManager implements ILSPVirtualEditorManager {
    private readonly editorTypes;
    constructor();
    registerEditorType(options: IVirtualEditorType<CodeEditor.IEditor>): void;
    findBestImplementation(editors: CodeEditor.IEditor[]): IVirtualEditorType<any> | null;
}
export declare const VIRTUAL_EDITOR_MANAGER: JupyterFrontEndPlugin<ILSPVirtualEditorManager>;