slate-yjs
Version:
Yjs bindings for Slate.
43 lines • 3.97 kB
JavaScript
import { Node, Text } from 'slate';
import invariant from 'tiny-invariant';
import { toSlateNode, toSlatePath } from '../utils/convert';
/**
* Translates a Yjs array event into a slate operations.
*
* @param event
*/
export default function translateArrayEvent(editor, event) {
const targetPath = toSlatePath(event.path);
const targetElement = Node.get(editor, targetPath);
invariant(!Text.isText(targetElement), 'Cannot apply array event to text node');
let offset = 0;
const ops = [];
const children = Array.from(targetElement.children);
event.changes.delta.forEach((delta) => {
var _a, _b;
if ('retain' in delta) {
offset += (_a = delta.retain) !== null && _a !== void 0 ? _a : 0;
}
if ('delete' in delta) {
const path = [...targetPath, offset];
children.splice(offset, (_b = delta.delete) !== null && _b !== void 0 ? _b : 0).forEach((node) => {
ops.push({ type: 'remove_node', path, node });
});
}
if ('insert' in delta) {
invariant(Array.isArray(delta.insert), `Unexpected array insert content type: expected array, got ${JSON.stringify(delta.insert)}`);
const toInsert = delta.insert.map(toSlateNode);
toInsert.forEach((node, i) => {
ops.push({
type: 'insert_node',
path: [...targetPath, offset + i],
node,
});
});
children.splice(offset, 0, ...toInsert);
offset += delta.insert.length;
}
});
return ops;
}
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