sematable/lib/Pagination.js

Client side sorting, pagination, and text filter for redux/react based apps

'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; }; }();

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _lodash = require('lodash');

var _lodash2 = _interopRequireDefault(_lodash);

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

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 propTypes = {
  page: _propTypes2.default.number.isRequired,
  pageCount: _propTypes2.default.number.isRequired,
  pageSize: _propTypes2.default.number.isRequired,
  onPageChange: _propTypes2.default.func.isRequired,
  autoHidePagination: _propTypes2.default.bool
};

var pageItem = function pageItem(idx, page, onPageChange) {
  return _react2.default.createElement(
    'li',
    { key: idx, className: 'page-item ' + (idx === page ? 'active' : '') },
    _react2.default.createElement(
      'a',
      {
        href: '#next',
        className: 'page-link',
        onClick: function onClick(e) {
          e.preventDefault();
          onPageChange(idx);
        }
      },
      idx + 1
    )
  );
};
var ellipsisItem = function ellipsisItem(idx) {
  return _react2.default.createElement(
    'li',
    { key: 'ellipsis-' + idx, className: 'page-item' },
    _react2.default.createElement(
      'div',
      { className: 'page-link' },
      '...'
    )
  );
};
// shown pages: first, pagesBeforeCurrent, current, pagesAfterCurrent, last
var pagesBeforeCurrent = 5;
var pagesAfterCurrent = 5;
var currentPageRange = function currentPageRange(page, pageCount) {
  var rangeCount = Math.min(pageCount - 2, pagesBeforeCurrent + pagesAfterCurrent + 1);
  var firstPageMinValue = 1;
  var firstPageMaxValue = pageCount - 1 - rangeCount;
  var firstPage = page - pagesBeforeCurrent;
  firstPage = Math.max(firstPage, firstPageMinValue);
  firstPage = Math.min(firstPage, firstPageMaxValue);
  return _lodash2.default.range(firstPage, firstPage + rangeCount);
};
var middlePages = function middlePages(page, pageCount, onPageChange) {
  var pageRange = currentPageRange(page, pageCount);
  var ret = [];
  if (pageRange[0] > 1) ret.push(ellipsisItem(0));
  ret.push(pageRange.map(function (idx) {
    return pageItem(idx, page, onPageChange);
  }));
  if (pageRange[pageRange.length - 1] < pageCount - 2) ret.push(ellipsisItem(1));
  return ret;
};

var Pagination = function (_Component) {
  _inherits(Pagination, _Component);

  function Pagination() {
    _classCallCheck(this, Pagination);

    return _possibleConstructorReturn(this, (Pagination.__proto__ || Object.getPrototypeOf(Pagination)).apply(this, arguments));
  }

  _createClass(Pagination, [{
    key: 'render',
    value: function render() {
      var _props = this.props,
          page = _props.page,
          pageSize = _props.pageSize,
          onPageChange = _props.onPageChange,
          autoHidePagination = _props.autoHidePagination;
      var pageCount = this.props.pageCount;

      var hasPrevious = page > 0;
      var hasNext = page < pageCount - 1;
      if (pageSize < 1) {
        pageCount = 1;
        hasPrevious = false;
        hasNext = false;
      }
      if (pageCount > 1 || !autoHidePagination) {
        return _react2.default.createElement(
          'nav',
          null,
          _react2.default.createElement(
            'ul',
            { className: 'pagination' },
            _react2.default.createElement(
              'li',
              { className: 'page-item ' + (hasPrevious ? '' : 'disabled') },
              _react2.default.createElement(
                'a',
                {
                  href: '#previous',
                  className: 'page-link',
                  'aria-label': 'Previous',
                  onClick: function onClick(e) {
                    e.preventDefault();
                    if (hasPrevious) {
                      onPageChange(page - 1);
                    }
                  }
                },
                _react2.default.createElement(
                  'span',
                  { 'aria-hidden': 'true' },
                  '\xAB'
                ),
                _react2.default.createElement(
                  'span',
                  { className: 'sr-only' },
                  'Previous'
                )
              )
            ),
            pageItem(0, page, onPageChange),
            pageCount > 2 && middlePages(page, pageCount, onPageChange),
            pageCount > 1 && pageItem(pageCount - 1, page, onPageChange),
            _react2.default.createElement(
              'li',
              { className: 'page-item ' + (hasNext ? '' : 'disabled') },
              _react2.default.createElement(
                'a',
                {
                  href: '#page',
                  className: 'page-link',
                  'aria-label': 'Next',
                  onClick: function onClick(e) {
                    e.preventDefault();
                    if (hasNext) {
                      onPageChange(page + 1);
                    }
                  }
                },
                _react2.default.createElement(
                  'span',
                  { 'aria-hidden': 'true' },
                  '\xBB'
                ),
                _react2.default.createElement(
                  'span',
                  { className: 'sr-only' },
                  'Next'
                )
              )
            )
          )
        );
      }
      return null;
    }
  }]);

  return Pagination;
}(_react.Component);

Pagination.propTypes = propTypes;
exports.default = Pagination;