react-virtualized/dist/commonjs/Collection/Section.js

React components for efficiently rendering large, scrollable lists and tabular data

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/**
 * A section of the Window.
 * Window Sections are used to group nearby cells.
 * This enables us to more quickly determine which cells to display in a given region of the Window.
 * Sections have a fixed size and contain 0 to many cells (tracked by their indices).
 */
var Section = function () {
  function Section(_ref) {
    var height = _ref.height;
    var width = _ref.width;
    var x = _ref.x;
    var y = _ref.y;

    _classCallCheck(this, Section);

    this.height = height;
    this.width = width;
    this.x = x;
    this.y = y;

    this._indexMap = {};
    this._indices = [];
  }

  /** Add a cell to this section. */


  _createClass(Section, [{
    key: 'addCellIndex',
    value: function addCellIndex(_ref2) {
      var index = _ref2.index;

      if (!this._indexMap[index]) {
        this._indexMap[index] = true;
        this._indices.push(index);
      }
    }

    /** Get all cell indices that have been added to this section. */

  }, {
    key: 'getCellIndices',
    value: function getCellIndices() {
      return this._indices;
    }

    /** Intended for debugger/test purposes only */

  }, {
    key: 'toString',
    value: function toString() {
      return this.x + ',' + this.y + ' ' + this.width + 'x' + this.height;
    }
  }]);

  return Section;
}(); /** @rlow */


exports.default = Section;