react-infinite-table/dist/commonjs/lib/computers/constantInfiniteComputer.js

React table with infinite rows and much more!

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));

var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));

var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));

var _infiniteComputer = _interopRequireDefault(require("./infiniteComputer.js"));

function _createSuper(Derived) { return function () { var Super = (0, _getPrototypeOf2["default"])(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = (0, _getPrototypeOf2["default"])(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return (0, _possibleConstructorReturn2["default"])(this, result); }; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }

var ConstantInfiniteComputer = /*#__PURE__*/function (_InfiniteComputer) {
  (0, _inherits2["default"])(ConstantInfiniteComputer, _InfiniteComputer);

  var _super = _createSuper(ConstantInfiniteComputer);

  function ConstantInfiniteComputer(rowCount, rowHeight) {
    var _this;

    (0, _classCallCheck2["default"])(this, ConstantInfiniteComputer);
    _this = _super.call(this);
    _this.rowCount = rowCount;
    _this.rowHeight = rowHeight;
    return _this;
  }

  (0, _createClass2["default"])(ConstantInfiniteComputer, [{
    key: "getTotalScrollableHeight",
    value: function getTotalScrollableHeight() {
      return this.rowHeight * this.rowCount;
    }
  }, {
    key: "getDisplayIndexStart",
    value: function getDisplayIndexStart(windowTop) {
      return Math.floor(windowTop / this.rowHeight);
    }
  }, {
    key: "getDisplayIndexEnd",
    value: function getDisplayIndexEnd(windowBottom) {
      var nonZeroIndex = Math.ceil(windowBottom / this.rowHeight);

      if (nonZeroIndex > 0) {
        return nonZeroIndex - 1;
      }

      return nonZeroIndex;
    }
  }, {
    key: "getTopSpacerHeight",
    value: function getTopSpacerHeight(displayIndexStart) {
      return displayIndexStart * this.rowHeight;
    }
  }, {
    key: "getBottomSpacerHeight",
    value: function getBottomSpacerHeight(displayIndexEnd) {
      var nonZeroIndex = displayIndexEnd + 1;
      return Math.max(0, (this.rowCount - nonZeroIndex) * this.rowHeight);
    }
  }]);
  return ConstantInfiniteComputer;
}(_infiniteComputer["default"]);

var _default = ConstantInfiniteComputer;
exports["default"] = _default;