react-virtualized-sectionlist/dist/es/index.js

React SectionList component based in react-virtualized List

'use strict';

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

var _extends2 = require('babel-runtime/helpers/extends');

var _extends3 = _interopRequireDefault(_extends2);

var _objectWithoutProperties2 = require('babel-runtime/helpers/objectWithoutProperties');

var _objectWithoutProperties3 = _interopRequireDefault(_objectWithoutProperties2);

var _getPrototypeOf = require('babel-runtime/core-js/object/get-prototype-of');

var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _reactVirtualized = require('react-virtualized');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var SectionList = function (_PureComponent) {
  (0, _inherits3.default)(SectionList, _PureComponent);

  function SectionList(props, context) {
    (0, _classCallCheck3.default)(this, SectionList);

    var _this = (0, _possibleConstructorReturn3.default)(this, (SectionList.__proto__ || (0, _getPrototypeOf2.default)(SectionList)).call(this, props, context));

    _this._captureRef = function (ref) {
      _this._listRef = ref;
    };

    _this.getListRef = _this.getListRef.bind(_this);
    _this._rowHeight = _this._rowHeight.bind(_this);
    _this._renderItem = _this._renderItem.bind(_this);

    _this.state = _this._computeState(props);
    return _this;
  }

  (0, _createClass3.default)(SectionList, [{
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      this.setState(this._computeState(nextProps));
    }
  }, {
    key: '_computeState',
    value: function _computeState(props) {
      var itemCount = props.sections.reduce(function (v, section) {
        return v + section.data.length + 1; // Add one for the section header.
      }, 0);

      var sectionHeaderRenderer = props.sectionHeaderRenderer,
          sectionHeaderHeight = props.sectionHeaderHeight,
          rowRenderer = props.rowRenderer,
          rowHeight = props.rowHeight,
          childProps = (0, _objectWithoutProperties3.default)(props, ['sectionHeaderRenderer', 'sectionHeaderHeight', 'rowRenderer', 'rowHeight']);


      return {
        childProps: (0, _extends3.default)({}, childProps, {
          rowCount: itemCount,
          rowHeight: this._rowHeight,
          rowRenderer: this._renderItem
        })
      };
    }
  }, {
    key: '_rowHeight',
    value: function _rowHeight(_ref) {
      var index = _ref.index;

      var info = subExtractor(this.props.sections, index);
      if (!info) {
        return 0;
      }

      if (!!info.header) {
        if (!!this.props.sectionHeaderRenderer) {
          if (!!this.props.sectionHeaderHeight) {
            return typeof this.props.sectionHeaderHeight === "function" ? this.props.sectionHeaderHeight({ index: index }) : +this.props.sectionHeaderHeight;
          }
        } else {
          return 0;
        }
      }

      return typeof this.props.rowHeight === "function" ? this.props.rowHeight({ index: index }) : +this.props.rowHeight;
    }
  }, {
    key: '_renderItem',
    value: function _renderItem(_ref2) {
      var key = _ref2.key,
          index = _ref2.index,
          isScrolling = _ref2.isScrolling,
          isVisible = _ref2.isVisible,
          style = _ref2.style,
          parent = _ref2.parent;

      var info = subExtractor(this.props.sections, index);
      if (!!info) {
        if (!!info.header) {
          if (!!this.props.sectionHeaderRenderer) {
            return this.props.sectionHeaderRenderer({
              key: key,
              title: info.section.title || null,
              sectionIndex: info.sectionIndex,
              isScrolling: isScrolling,
              isVisible: isVisible,
              parent: parent,
              style: style
            });
          }
        } else {
          return this.props.rowRenderer({
            key: key,
            item: info.section.data[info.index],
            sectionIndex: info.sectionIndex,
            rowIndex: info.index,
            isScrolling: isScrolling,
            isVisible: isVisible,
            parent: parent,
            style: style
          });
        }
      }

      return null;
    }
  }, {
    key: 'getListRef',
    value: function getListRef() {
      return this._listRef;
    }
  }, {
    key: 'render',
    value: function render() {
      return _react2.default.createElement(_reactVirtualized.List, (0, _extends3.default)({}, this.state.childProps, { ref: this._captureRef }));
    }
  }]);
  return SectionList;
}(_react.PureComponent);

SectionList.defaultProps = (0, _extends3.default)({}, _reactVirtualized.List.defaultProps, {
  sections: []
});
exports.default = SectionList;


function subExtractor() {
  var sections = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
  var index = arguments[1];

  var itemIndex = index;
  for (var ii = 0; ii < sections.length; ii++) {
    var section = sections[ii];
    itemIndex -= 1; // The section adds an item for the header
    if (itemIndex >= section.data.length) {
      itemIndex -= section.data.length;
    } else if (itemIndex === -1) {
      return {
        section: section,
        sectionIndex: ii,
        index: null,
        header: true
      };
    } else {
      return {
        section: section,
        sectionIndex: ii,
        index: itemIndex,
        header: false
      };
    }
  }
};