slate-yjs
Version:
Yjs bindings for Slate.
45 lines • 3.79 kB
JavaScript
import { Node, Text } from 'slate';
import invariant from 'tiny-invariant';
import { toSlatePath } from '../utils/convert';
/**
* Translates a Yjs text event into a slate operations.
*
* @param event
*/
export default function translateTextEvent(editor, event) {
const targetPath = toSlatePath(event.path);
const targetText = Node.get(editor, targetPath);
invariant(Text.isText(targetText), 'Cannot apply text event to non-text node');
let offset = 0;
let { text } = targetText;
const ops = [];
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 endOffset = offset + ((_b = delta.delete) !== null && _b !== void 0 ? _b : 0);
ops.push({
type: 'remove_text',
offset,
path: targetPath,
text: text.slice(offset, endOffset),
});
text = text.slice(0, offset) + text.slice(endOffset);
}
if ('insert' in delta) {
invariant(typeof delta.insert === 'string', `Unexpected text insert content type: expected string, got ${typeof delta.insert}`);
ops.push({
type: 'insert_text',
offset,
text: delta.insert,
path: targetPath,
});
offset += delta.insert.length;
text = text.slice(0, offset) + delta.insert + text.slice(offset);
}
});
return ops;
}
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