marshall-y-slate/src/model/index.ts

Yjs bindings for Slate.

import { Descendant, Path, Range } from 'slate';
import * as Y from 'yjs';

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type SyncElement = Y.Map<any>;
export type SharedType = Y.Array<SyncElement>;
export type SyncNode = SharedType | SyncElement;

export interface Cursor extends Range {
    data: {
        [key: string]: unknown;
    };
}
export interface CursorInfo extends Cursor {
    isForward: boolean;
    originAnchorPath: Path;
    originFocusPath: Path;
    isCaret: boolean;
}

export interface CustomNode extends Node {
    [key: string]: any;
    children?: Descendant[];
}


export const SyncElement = {
    getText(element: SyncElement): Y.Text | undefined {
        return element?.get('text');
    },

    getChildren(element: SyncElement): Y.Array<SyncElement> | undefined {
        return element?.get('children');
    }
};

export const SyncNode = {
    getChildren(node: SyncNode): Y.Array<SyncElement> | undefined {
        if (node instanceof Y.Array) {
            return node;
        }

        return SyncElement.getChildren(node);
    },

    getText(node: SyncNode): Y.Text | undefined {
        if (node instanceof Y.Array) {
            return undefined;
        }

        return SyncElement.getText(node);
    },

    getFirstText(node: SyncNode): Y.Text {
        let text = SyncElement.getText(node as SyncElement);
        if (text) {
            return text;
        }
        const children = SyncNode.getChildren(node);
        const firstChild = children?.get(0);
        return SyncNode.getFirstText(firstChild as SyncNode);
    }
};