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frontend/node_modules/rc-virtual-list/lib/hooks/useOriginScroll.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _react = require("react");
+var _default = exports.default = function _default(isScrollAtTop, isScrollAtBottom, isScrollAtLeft, isScrollAtRight) {
+  // Do lock for a wheel when scrolling
+  var lockRef = (0, _react.useRef)(false);
+  var lockTimeoutRef = (0, _react.useRef)(null);
+  function lockScroll() {
+    clearTimeout(lockTimeoutRef.current);
+    lockRef.current = true;
+    lockTimeoutRef.current = setTimeout(function () {
+      lockRef.current = false;
+    }, 50);
+  }
+
+  // Pass to ref since global add is in closure
+  var scrollPingRef = (0, _react.useRef)({
+    top: isScrollAtTop,
+    bottom: isScrollAtBottom,
+    left: isScrollAtLeft,
+    right: isScrollAtRight
+  });
+  scrollPingRef.current.top = isScrollAtTop;
+  scrollPingRef.current.bottom = isScrollAtBottom;
+  scrollPingRef.current.left = isScrollAtLeft;
+  scrollPingRef.current.right = isScrollAtRight;
+  return function (isHorizontal, delta) {
+    var smoothOffset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+    var originScroll = isHorizontal ?
+    // Pass origin wheel when on the left
+    delta < 0 && scrollPingRef.current.left ||
+    // Pass origin wheel when on the right
+    delta > 0 && scrollPingRef.current.right // Pass origin wheel when on the top
+    : delta < 0 && scrollPingRef.current.top ||
+    // Pass origin wheel when on the bottom
+    delta > 0 && scrollPingRef.current.bottom;
+    if (smoothOffset && originScroll) {
+      // No need lock anymore when it's smooth offset from touchMove interval
+      clearTimeout(lockTimeoutRef.current);
+      lockRef.current = false;
+    } else if (!originScroll || lockRef.current) {
+      lockScroll();
+    }
+    return !lockRef.current && originScroll;
+  };
+};