first commit

frontend/node_modules/rc-picker/lib/PickerInput/hooks/useDelayState.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = useDelayState;
+var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
+var _rcUtil = require("rc-util");
+var _raf = _interopRequireDefault(require("rc-util/lib/raf"));
+var _react = _interopRequireDefault(require("react"));
+/**
+ * Will be `true` immediately for next effect.
+ * But will be `false` for a delay of effect.
+ */
+function useDelayState(value, defaultValue, onChange) {
+  var _useMergedState = (0, _rcUtil.useMergedState)(defaultValue, {
+      value: value
+    }),
+    _useMergedState2 = (0, _slicedToArray2.default)(_useMergedState, 2),
+    state = _useMergedState2[0],
+    setState = _useMergedState2[1];
+  var nextValueRef = _react.default.useRef(value);
+
+  // ============================= Update =============================
+  var rafRef = _react.default.useRef();
+  var cancelRaf = function cancelRaf() {
+    _raf.default.cancel(rafRef.current);
+  };
+  var doUpdate = (0, _rcUtil.useEvent)(function () {
+    setState(nextValueRef.current);
+    if (onChange && state !== nextValueRef.current) {
+      onChange(nextValueRef.current);
+    }
+  });
+  var updateValue = (0, _rcUtil.useEvent)(function (next, immediately) {
+    cancelRaf();
+    nextValueRef.current = next;
+    if (next || immediately) {
+      doUpdate();
+    } else {
+      rafRef.current = (0, _raf.default)(doUpdate);
+    }
+  });
+  _react.default.useEffect(function () {
+    return cancelRaf;
+  }, []);
+  return [state, updateValue];
+}