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

React SectionList component based in react-virtualized List

'use strict';

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

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

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

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var SectionList = function (_PureComponent) {
  _inherits(SectionList, _PureComponent);

  function SectionList(props, context) {
    _classCallCheck(this, SectionList);

    var _this = _possibleConstructorReturn(this, (SectionList.__proto__ || Object.getPrototypeOf(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;
  }

  _createClass(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 = _objectWithoutProperties(props, ['sectionHeaderRenderer', 'sectionHeaderHeight', 'rowRenderer', 'rowHeight']);

      return {
        childProps: _extends({}, 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, _extends({}, this.state.childProps, { ref: this._captureRef }));
    }
  }]);

  return SectionList;
}(_react.PureComponent);

SectionList.defaultProps = _extends({}, _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
      };
    }
  }
};