react-bootstrap-table2-paginator/lib/src/page-resolver.js

it's the pagination addon for react-bootstrap-table2

'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 _const = require('./const');

var _const2 = _interopRequireDefault(_const);

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; } /* eslint no-mixed-operators: 0 */


exports.default = function (ExtendBase) {
  return function (_ExtendBase) {
    _inherits(PageResolver, _ExtendBase);

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

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

    _createClass(PageResolver, [{
      key: 'backToPrevPage',
      value: function backToPrevPage() {
        var _props = this.props,
            currPage = _props.currPage,
            pageStartIndex = _props.pageStartIndex;

        return currPage - 1 < pageStartIndex ? pageStartIndex : currPage - 1;
      }
    }, {
      key: 'initialState',
      value: function initialState() {
        var totalPages = this.calculateTotalPage();
        var lastPage = this.calculateLastPage(totalPages);
        return { totalPages: totalPages, lastPage: lastPage };
      }
    }, {
      key: 'calculateTotalPage',
      value: function calculateTotalPage() {
        var sizePerPage = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.props.currSizePerPage;
        var dataSize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.props.dataSize;

        return Math.ceil(dataSize / sizePerPage);
      }
    }, {
      key: 'calculateLastPage',
      value: function calculateLastPage(totalPages) {
        var pageStartIndex = this.props.pageStartIndex;

        return pageStartIndex + totalPages - 1;
      }
    }, {
      key: 'calculateFromTo',
      value: function calculateFromTo() {
        var _props2 = this.props,
            dataSize = _props2.dataSize,
            currPage = _props2.currPage,
            currSizePerPage = _props2.currSizePerPage,
            pageStartIndex = _props2.pageStartIndex;

        var offset = Math.abs(_const2.default.PAGE_START_INDEX - pageStartIndex);

        var from = (currPage - pageStartIndex) * currSizePerPage;
        from = dataSize === 0 ? 0 : from + 1;
        var to = Math.min(currSizePerPage * (currPage + offset), dataSize);
        if (to > dataSize) to = dataSize;

        return [from, to];
      }
    }, {
      key: 'calculatePages',
      value: function calculatePages(totalPages, lastPage) {
        var _props3 = this.props,
            currPage = _props3.currPage,
            paginationSize = _props3.paginationSize,
            pageStartIndex = _props3.pageStartIndex,
            withFirstAndLast = _props3.withFirstAndLast,
            firstPageText = _props3.firstPageText,
            prePageText = _props3.prePageText,
            nextPageText = _props3.nextPageText,
            lastPageText = _props3.lastPageText,
            alwaysShowAllBtns = _props3.alwaysShowAllBtns;


        var pages = [];
        var endPage = totalPages;
        if (endPage <= 0) return [];

        var startPage = Math.max(currPage - Math.floor(paginationSize / 2), pageStartIndex);
        endPage = startPage + paginationSize - 1;

        if (endPage > lastPage) {
          endPage = lastPage;
          startPage = endPage - paginationSize + 1;
        }

        if (alwaysShowAllBtns) {
          if (withFirstAndLast) {
            pages = [firstPageText, prePageText];
          } else {
            pages = [prePageText];
          }
        }

        if (startPage !== pageStartIndex && totalPages > paginationSize && withFirstAndLast && pages.length === 0) {
          pages = [firstPageText, prePageText];
        } else if (totalPages > 1 && pages.length === 0) {
          pages = [prePageText];
        }

        for (var i = startPage; i <= endPage; i += 1) {
          if (i >= pageStartIndex) pages.push(i);
        }

        if (alwaysShowAllBtns || endPage <= lastPage && pages.length > 1) {
          pages.push(nextPageText);
        }
        if (endPage !== lastPage && withFirstAndLast || withFirstAndLast && alwaysShowAllBtns) {
          pages.push(lastPageText);
        }

        // if ((endPage <= lastPage && pages.length > 1) || alwaysShowAllBtns) {
        //   pages.push(nextPageText);
        // }
        // if (endPage !== lastPage && withFirstAndLast) {
        //   pages.push(lastPageText);
        // }

        return pages;
      }
    }, {
      key: 'calculatePageStatus',
      value: function calculatePageStatus() {
        var pages = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];

        var _this2 = this;

        var lastPage = arguments[1];
        var disablePageTitle = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
        var _props4 = this.props,
            currPage = _props4.currPage,
            pageStartIndex = _props4.pageStartIndex,
            firstPageText = _props4.firstPageText,
            prePageText = _props4.prePageText,
            nextPageText = _props4.nextPageText,
            lastPageText = _props4.lastPageText,
            alwaysShowAllBtns = _props4.alwaysShowAllBtns;

        var isStart = function isStart(page) {
          return currPage === pageStartIndex && (page === firstPageText || page === prePageText);
        };
        var isEnd = function isEnd(page) {
          return currPage === lastPage && (page === nextPageText || page === lastPageText);
        };

        return pages.filter(function (page) {
          if (alwaysShowAllBtns) {
            return true;
          }
          return !(isStart(page) || isEnd(page));
        }).map(function (page) {
          var title = void 0;
          var active = page === currPage;
          var disabled = isStart(page) || isEnd(page);

          if (page === nextPageText) {
            title = _this2.props.nextPageTitle;
          } else if (page === prePageText) {
            title = _this2.props.prePageTitle;
          } else if (page === firstPageText) {
            title = _this2.props.firstPageTitle;
          } else if (page === lastPageText) {
            title = _this2.props.lastPageTitle;
          } else {
            title = '' + page;
          }

          var pageResult = { page: page, active: active, disabled: disabled };
          if (!disablePageTitle) {
            pageResult.title = title;
          }
          return pageResult;
        });
      }
    }, {
      key: 'calculateSizePerPageStatus',
      value: function calculateSizePerPageStatus() {
        var sizePerPageList = this.props.sizePerPageList;

        return sizePerPageList.map(function (_sizePerPage) {
          var pageText = typeof _sizePerPage.text !== 'undefined' ? _sizePerPage.text : _sizePerPage;
          var pageNumber = typeof _sizePerPage.value !== 'undefined' ? _sizePerPage.value : _sizePerPage;
          return {
            text: '' + pageText,
            page: pageNumber
          };
        });
      }
    }]);

    return PageResolver;
  }(ExtendBase);
};