@atlaskit/editor-plugin-synced-block/dist/es2019/pm-plugins/utils/transaction-inserts-synced-block.js

SyncedBlock plugin for @atlaskit/editor-core

import { ReplaceAroundStep, ReplaceStep } from '@atlaskit/editor-prosemirror/transform';

/**
 * Cheap step-level scan to detect whether the given transaction inserts a
 * synced block (source or reference). Used by the lazy-init path to know when
 * a previously "no synced blocks" document has gained one.
 */
export const transactionInsertsSyncedBlock = tr => {
  if (!tr.docChanged) {
    return false;
  }
  for (const step of tr.steps) {
    if (!(step instanceof ReplaceStep || step instanceof ReplaceAroundStep)) {
      continue;
    }
    const childCount = step.slice.content.childCount;
    for (let i = 0; i < childCount; i++) {
      const child = step.slice.content.child(i);
      if (child.type.name === 'syncBlock' || child.type.name === 'bodiedSyncBlock') {
        return true;
      }
    }
  }
  return false;
};