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

React table with infinite rows and much more!

import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _inherits from "@babel/runtime/helpers/inherits";
import _possibleConstructorReturn from "@babel/runtime/helpers/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/getPrototypeOf";

function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(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; } }

import InfiniteComputer from './infiniteComputer.js';

var ConstantInfiniteComputer = /*#__PURE__*/function (_InfiniteComputer) {
  _inherits(ConstantInfiniteComputer, _InfiniteComputer);

  var _super = _createSuper(ConstantInfiniteComputer);

  function ConstantInfiniteComputer(rowCount, rowHeight) {
    var _this;

    _classCallCheck(this, ConstantInfiniteComputer);

    _this = _super.call(this);
    _this.rowCount = rowCount;
    _this.rowHeight = rowHeight;
    return _this;
  }

  _createClass(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);

export default ConstantInfiniteComputer;