es-grid-template/es/ali-table/utils/mergeCellProps.js

es-grid-template

import cx from 'classnames';
function composeEventHandler(handler1, handler2) {
  return (...args) => {
    // Execute the original event handler first
    handler1(args);
    handler2(args);
    // Event handlers do not return a value, so nothing is returned here
  };
}

/** Merge two cellProps objects and return a new merged object.
 *
 * mergeCellProps merges according to these rules:
 * - For primitive fields (number, string, boolean), values from `extra` override `base` (with `className` concatenated).
 * - For function fields (event handlers), mergeCellProps returns a new function that calls `base` then `extra`.
 * - For plain object fields (e.g., styles), mergeCellProps shallow-merges the two objects.
 */
export default function mergeCellProps(base, extra) {
  if (base == null) {
    return extra;
  }
  if (extra == null) {
    return base;
  }
  const result = Object.assign({}, base);
  for (const key of Object.keys(extra)) {
    const value = extra[key];
    const type = typeof value;
    if (value === null) {
      // When value === null, override the original value
      result[key] = null;
    } else if (value === undefined) {
      // When value === undefined, keep the original value
    } else if (type === 'number' || type === 'string' || type === 'boolean') {
      if (key === 'className') {
        result[key] = cx(result[key], value);
      } else {
        result[key] = value;
      }
    } else if (type === 'function') {
      const prev = result[key];
      if (prev == null) {
        result[key] = value;
      } else {
        result[key] = composeEventHandler(prev, value);
      }
    } else if (type === 'object') {
      result[key] = Object.assign({}, result[key], value);
    }
    // else `type` is 'bigint' or 'symbol', `value` is an invalid cellProp, ignore it
  }
  return result;
}