@antdv/pro-utils/lib/hooks/useMergedState/index.js

@antdv/pro-utils

var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var stdin_exports = {};
__export(stdin_exports, {
  useMergedState: () => useMergedState
});
module.exports = __toCommonJS(stdin_exports);
var import_vue = require("vue");
var import_useState = require("../useState");
function hasValue(value) {
  return value !== void 0;
}
function useMergedState(defaultStateValue, option) {
  const { defaultValue, value = (0, import_vue.ref)(), onChange, postState } = option || {};
  const [innerValue, setInnerValue] = (0, import_useState.useState)(() => {
    if (hasValue((0, import_vue.unref)(value))) {
      return (0, import_vue.unref)(value);
    } else if (hasValue(defaultValue)) {
      return typeof defaultValue === "function" ? defaultValue() : defaultValue;
    } else {
      return typeof defaultStateValue === "function" ? defaultStateValue() : defaultStateValue;
    }
  });
  const mergedValue = (0, import_vue.computed)(() => (0, import_vue.unref)(value) !== void 0 ? (0, import_vue.unref)(value) : innerValue.value);
  const postMergedValue = (0, import_vue.computed)(() => {
    return postState ? postState(mergedValue.value) : mergedValue.value;
  });
  const [prevValue, setPrevValue] = (0, import_useState.useState)([mergedValue.value]);
  (0, import_vue.watch)(
    prevValue,
    () => {
      const prev = prevValue.value[0];
      if (innerValue !== prev) {
        onChange == null ? void 0 : onChange(innerValue.value, prev);
      }
    },
    { flush: "post" }
  );
  (0, import_vue.watch)(
    value,
    () => {
      if (!hasValue((0, import_vue.unref)(value))) {
        setInnerValue((0, import_vue.unref)(value));
      }
    },
    { flush: "post" }
  );
  const triggerChange = (updater) => {
    setInnerValue(updater);
    setPrevValue([mergedValue.value]);
  };
  return [postMergedValue, triggerChange];
}