text: // Copyright 2011 Tart. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS-IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  goog.require('tart.Pagination');
  goog.provide('tart.CircularPagination');
  
  
  
  /**
   * CircularPagination class to handle circular paging events
   *
   * @constructor
   * @extends {tart.Pagination}
   */
  tart.CircularPagination = function() {
  
      goog.base(this);
  };
  goog.inherits(tart.CircularPagination, tart.Pagination);
  
  
  /**
   * Overriding tart.Pagination's hasPrev method, to return true for all conditions to make circular pages.
   *
   * @override
   * @return {boolean} Whether previous page is available .
   */
  tart.CircularPagination.prototype.hasPrev = function() {
      return true;
  };
  
  
  /**
   * Overriding tart.Pagination's hasNext method, to return true for all conditions to make circular pages.
   *
   * @override
   * @return {boolean} Whether next page is available .
   */
  tart.CircularPagination.prototype.hasNext = function() {
      return true;
  };
  
  
  /**
   * @override
   */
  tart.CircularPagination.prototype.getNext = function() {
      return this.currentPage == this.getTotalPage() ? 1 : this.currentPage + 1;
  };
  
  
  /**
   * @override
   */
  tart.CircularPagination.prototype.getPrev = function() {
      return this.currentPage == 1 ? this.getTotalPage() : this.currentPage - 1;
  };
  
  
  /**
   * @override
   */
  tart.CircularPagination.prototype.setCurrentPage = function(page) {
      if (this.getTotalItems() > this.getItemPerPage()) {
          var oldValue = this.currentPage;
          this.currentPage = page;
  
          this.triggerPageChange_(oldValue, page);
      }
  
      return this;
  };
  