planning

node_modules/react-dnd-html5-backend/dist/cjs/EnterLeaveCounter.js

@@ -0,0 +1,60 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.EnterLeaveCounter = void 0;
+
+var _js_utils = require("./utils/js_utils");
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var EnterLeaveCounter = /*#__PURE__*/function () {
+  function EnterLeaveCounter(isNodeInDocument) {
+    _classCallCheck(this, EnterLeaveCounter);
+
+    _defineProperty(this, "entered", []);
+
+    _defineProperty(this, "isNodeInDocument", void 0);
+
+    this.isNodeInDocument = isNodeInDocument;
+  }
+
+  _createClass(EnterLeaveCounter, [{
+    key: "enter",
+    value: function enter(enteringNode) {
+      var _this = this;
+
+      var previousLength = this.entered.length;
+
+      var isNodeEntered = function isNodeEntered(node) {
+        return _this.isNodeInDocument(node) && (!node.contains || node.contains(enteringNode));
+      };
+
+      this.entered = (0, _js_utils.union)(this.entered.filter(isNodeEntered), [enteringNode]);
+      return previousLength === 0 && this.entered.length > 0;
+    }
+  }, {
+    key: "leave",
+    value: function leave(leavingNode) {
+      var previousLength = this.entered.length;
+      this.entered = (0, _js_utils.without)(this.entered.filter(this.isNodeInDocument), leavingNode);
+      return previousLength > 0 && this.entered.length === 0;
+    }
+  }, {
+    key: "reset",
+    value: function reset() {
+      this.entered = [];
+    }
+  }]);
+
+  return EnterLeaveCounter;
+}();
+
+exports.EnterLeaveCounter = EnterLeaveCounter;