hyperformula/es/ContentChanges.mjs

HyperFormula is a JavaScript engine for efficient processing of spreadsheet-like data and formulas

/**
 * @license
 * Copyright (c) 2025 Handsoncode. All rights reserved.
 */
import { addressKey } from "./Cell.mjs";
import { SimpleRangeValue } from "./SimpleRangeValue.mjs";
export class ContentChanges {
  constructor() {
    this.changes = new Map();
  }
  static empty() {
    return new ContentChanges();
  }
  addAll(other) {
    for (const change of other.changes.values()) {
      this.add(change.address, change);
    }
    return this;
  }
  addChange(newValue, address, oldValue) {
    this.addInterpreterValue(newValue, address, oldValue);
  }
  exportChanges(exporter) {
    let ret = [];
    this.changes.forEach(e => {
      const change = exporter.exportChange(e);
      if (Array.isArray(change)) {
        ret = ret.concat(change);
      } else {
        ret.push(change);
      }
    });
    return ret;
  }
  getChanges() {
    return Array.from(this.changes.values());
  }
  isEmpty() {
    return this.changes.size === 0;
  }
  add(address, change) {
    const value = change.value;
    if (value instanceof SimpleRangeValue) {
      for (const cellAddress of value.effectiveAddressesFromData(address)) {
        this.changes.delete(addressKey(cellAddress));
      }
    }
    this.changes.set(addressKey(address), change);
  }
  addInterpreterValue(value, address, oldValue) {
    this.add(address, {
      address,
      value,
      oldValue
    });
  }
}