pagination.js

/*
 * pagination.js 2.1.5
 * A jQuery plugin to provide simple yet fully customisable pagination.
 * https://github.com/superRaytin/paginationjs
 *
 * Homepage: http://pagination.js.org
 *
 * Copyright 2014-2100, superRaytin
 * Released under the MIT license.
 */

(function(global, $) {

  if (typeof $ === 'undefined') {
    throwError('Pagination requires jQuery.');
  }

  var pluginName = 'pagination';

  var pluginHookMethod = 'addHook';

  var eventPrefix = '__pagination-';

  // Conflict, use backup
  if ($.fn.pagination) {
    pluginName = 'pagination2';
  }

  $.fn[pluginName] = function(options) {

    if (typeof options === 'undefined') {
      return this;
    }

    var container = $(this);

    var attributes = $.extend({}, $.fn[pluginName].defaults, options);

    var pagination = {

      initialize: function() {
        var self = this;

        // Cache attributes of current instance
        if (!container.data('pagination')) {
          container.data('pagination', {});
        }

        if (self.callHook('beforeInit') === false) return;

        // Pagination has been initialized, destroy it
        if (container.data('pagination').initialized) {
          $('.paginationjs', container).remove();
        }

        // Whether to disable Pagination at the initialization
        self.disabled = !!attributes.disabled;

        // Model will be passed to the callback function
        var model = self.model = {
          pageRange: attributes.pageRange,
          pageSize: attributes.pageSize
        };

        // dataSource`s type is unknown, parse it to find true data
        self.parseDataSource(attributes.dataSource, function(dataSource) {

          // Currently in asynchronous mode
          self.isAsync = Helpers.isString(dataSource);
          if (Helpers.isArray(dataSource)) {
            model.totalNumber = attributes.totalNumber = dataSource.length;
          }

          // Currently in asynchronous mode and a totalNumberLocator is specified
          self.isDynamicTotalNumber = self.isAsync && attributes.totalNumberLocator;

          var el = self.render(true);

          // Add extra className to the pagination element
            if (attributes.className) {
            el.addClass(attributes.className);
          }

          model.el = el;

          // Append/prepend pagination element to the container
          container[attributes.position === 'bottom' ? 'append' : 'prepend'](el);

          // Bind events
          self.observer();

          // Pagination is currently initialized
          container.data('pagination').initialized = true;

          // Will be invoked after initialized
          self.callHook('afterInit', el);
        });
      },

      render: function(isBoot) {
        var self = this;
        var model = self.model;
        var el = model.el || $('<div class="paginationjs"></div>');
        var isForced = isBoot !== true;

        self.callHook('beforeRender', isForced);

        var currentPage = model.pageNumber || attributes.pageNumber;
        var pageRange = attributes.pageRange || 0;
        var totalPage = self.getTotalPage();

        var rangeStart = currentPage - pageRange;
        var rangeEnd = currentPage + pageRange;

        if (rangeEnd > totalPage) {
          rangeEnd = totalPage;
          rangeStart = totalPage - pageRange * 2;
          rangeStart = rangeStart < 1 ? 1 : rangeStart;
        }

        if (rangeStart <= 1) {
          rangeStart = 1;
          rangeEnd = Math.min(pageRange * 2 + 1, totalPage);
        }

        el.html(self.generateHTML({
          currentPage: currentPage,
          pageRange: pageRange,
          rangeStart: rangeStart,
          rangeEnd: rangeEnd
        }));

        // There is only one page
        if (attributes.hideWhenLessThanOnePage) {
          el[totalPage <= 1 ? 'hide' : 'show']();
        }

        self.callHook('afterRender', isForced);

        return el;
      },

      // Generate HTML of the pages
      generatePageNumbersHTML: function(args) {
        var self = this;
        var currentPage = args.currentPage;
        var totalPage = self.getTotalPage();
        var rangeStart = args.rangeStart;
        var rangeEnd = args.rangeEnd;
        var html = '';
        var i;

        var pageLink = attributes.pageLink;
        var ellipsisText = attributes.ellipsisText;

        var classPrefix = attributes.classPrefix;
        var activeClassName = attributes.activeClassName;
        var disableClassName = attributes.disableClassName;

        // Disable page range, display all the pages
        if (attributes.pageRange === null) {
          for (i = 1; i <= totalPage; i++) {
            if (i == currentPage) {
              html += '<li class="' + classPrefix + '-page J-paginationjs-page ' + activeClassName + '" data-num="' + i + '"><a>' + i + '<\/a><\/li>';
            } else {
              html += '<li class="' + classPrefix + '-page J-paginationjs-page" data-num="' + i + '"><a href="' + pageLink + '">' + i + '<\/a><\/li>';
            }
          }
          return html;
        }

        if (rangeStart <= 3) {
          for (i = 1; i < rangeStart; i++) {
            if (i == currentPage) {
              html += '<li class="' + classPrefix + '-page J-paginationjs-page ' + activeClassName + '" data-num="' + i + '"><a>' + i + '<\/a><\/li>';
            } else {
              html += '<li class="' + classPrefix + '-page J-paginationjs-page" data-num="' + i + '"><a href="' + pageLink + '">' + i + '<\/a><\/li>';
            }
          }
        } else {
          if (attributes.showFirstOnEllipsisShow) {
            html += '<li class="' + classPrefix + '-page ' + classPrefix + '-first J-paginationjs-page" data-num="1"><a href="' + pageLink + '">1<\/a><\/li>';
          }
          html += '<li class="' + classPrefix + '-ellipsis ' + disableClassName + '"><a>' + ellipsisText + '<\/a><\/li>';
        }

        for (i = rangeStart; i <= rangeEnd; i++) {
          if (i == currentPage) {
            html += '<li class="' + classPrefix + '-page J-paginationjs-page ' + activeClassName + '" data-num="' + i + '"><a>' + i + '<\/a><\/li>';
          } else {
            html += '<li class="' + classPrefix + '-page J-paginationjs-page" data-num="' + i + '"><a href="' + pageLink + '">' + i + '<\/a><\/li>';
          }
        }

        if (rangeEnd >= totalPage - 2) {
          for (i = rangeEnd + 1; i <= totalPage; i++) {
            html += '<li class="' + classPrefix + '-page J-paginationjs-page" data-num="' + i + '"><a href="' + pageLink + '">' + i + '<\/a><\/li>';
          }
        } else {
          html += '<li class="' + classPrefix + '-ellipsis ' + disableClassName + '"><a>' + ellipsisText + '<\/a><\/li>';

          if (attributes.showLastOnEllipsisShow) {
            html += '<li class="' + classPrefix + '-page ' + classPrefix + '-last J-paginationjs-page" data-num="' + totalPage + '"><a href="' + pageLink + '">' + totalPage + '<\/a><\/li>';
          }
        }

        return html;
      },

      // Generate HTML content from the template
      generateHTML: function(args) {
        var self = this;
        var currentPage = args.currentPage;
        var totalPage = self.getTotalPage();

        var totalNumber = self.getTotalNumber();

        var showPrevious = attributes.showPrevious;
        var showNext = attributes.showNext;
        var showPageNumbers = attributes.showPageNumbers;
        var showNavigator = attributes.showNavigator;
        var showGoInput = attributes.showGoInput;
        var showGoButton = attributes.showGoButton;

        var pageLink = attributes.pageLink;
        var prevText = attributes.prevText;
        var nextText = attributes.nextText;
        var goButtonText = attributes.goButtonText;

        var classPrefix = attributes.classPrefix;
        var disableClassName = attributes.disableClassName;
        var ulClassName = attributes.ulClassName;

        var html = '';
        var goInput = '<input type="text" class="J-paginationjs-go-pagenumber">';
        var goButton = '<input type="button" class="J-paginationjs-go-button" value="' + goButtonText + '">';
        var formattedString;

        var formatNavigator = $.isFunction(attributes.formatNavigator) ? attributes.formatNavigator(currentPage, totalPage, totalNumber) : attributes.formatNavigator;
        var formatGoInput = $.isFunction(attributes.formatGoInput) ? attributes.formatGoInput(goInput, currentPage, totalPage, totalNumber) : attributes.formatGoInput;
        var formatGoButton = $.isFunction(attributes.formatGoButton) ? attributes.formatGoButton(goButton, currentPage, totalPage, totalNumber) : attributes.formatGoButton;

        var autoHidePrevious = $.isFunction(attributes.autoHidePrevious) ? attributes.autoHidePrevious() : attributes.autoHidePrevious;
        var autoHideNext = $.isFunction(attributes.autoHideNext) ? attributes.autoHideNext() : attributes.autoHideNext;

        var header = $.isFunction(attributes.header) ? attributes.header(currentPage, totalPage, totalNumber) : attributes.header;
        var footer = $.isFunction(attributes.footer) ? attributes.footer(currentPage, totalPage, totalNumber) : attributes.footer;

        // Whether to display header
        if (header) {
          formattedString = self.replaceVariables(header, {
            currentPage: currentPage,
            totalPage: totalPage,
            totalNumber: totalNumber
          });
          html += formattedString;
        }

        if (showPrevious || showPageNumbers || showNext) {
          html += '<div class="paginationjs-pages">';

          if (ulClassName) {
            html += '<ul class="' + ulClassName + '">';
          } else {
            html += '<ul>';
          }

          // Whether to display the Previous button
          if (showPrevious) {
            if (currentPage <= 1) {
              if (!autoHidePrevious) {
                html += '<li class="' + classPrefix + '-prev ' + disableClassName + '"><a>' + prevText + '<\/a><\/li>';
              }
            } else {
              html += '<li class="' + classPrefix + '-prev J-paginationjs-previous" data-num="' + (currentPage - 1) + '" title="Previous page"><a href="' + pageLink + '">' + prevText + '<\/a><\/li>';
            }
          }

          // Whether to display the pages
          if (showPageNumbers) {
            html += self.generatePageNumbersHTML(args);
          }

          // Whether to display the Next button
          if (showNext) {
            if (currentPage >= totalPage) {
              if (!autoHideNext) {
                html += '<li class="' + classPrefix + '-next ' + disableClassName + '"><a>' + nextText + '<\/a><\/li>';
              }
            } else {
              html += '<li class="' + classPrefix + '-next J-paginationjs-next" data-num="' + (currentPage + 1) + '" title="Next page"><a href="' + pageLink + '">' + nextText + '<\/a><\/li>';
            }
          }
          html += '<\/ul><\/div>';
        }

        // Whether to display the navigator
        if (showNavigator) {
          if (formatNavigator) {
            formattedString = self.replaceVariables(formatNavigator, {
              currentPage: currentPage,
              totalPage: totalPage,
              totalNumber: totalNumber
            });
            html += '<div class="' + classPrefix + '-nav J-paginationjs-nav">' + formattedString + '<\/div>';
          }
        }

        // Whether to display the Go input
        if (showGoInput) {
          if (formatGoInput) {
            formattedString = self.replaceVariables(formatGoInput, {
              currentPage: currentPage,
              totalPage: totalPage,
              totalNumber: totalNumber,
              input: goInput
            });
            html += '<div class="' + classPrefix + '-go-input">' + formattedString + '</div>';
          }
        }

        // Whether to display the Go button
        if (showGoButton) {
          if (formatGoButton) {
            formattedString = self.replaceVariables(formatGoButton, {
              currentPage: currentPage,
              totalPage: totalPage,
              totalNumber: totalNumber,
              button: goButton
            });
            html += '<div class="' + classPrefix + '-go-button">' + formattedString + '</div>';
          }
        }

        // Whether to display footer
        if (footer) {
          formattedString = self.replaceVariables(footer, {
            currentPage: currentPage,
            totalPage: totalPage,
            totalNumber: totalNumber
          });
          html += formattedString;
        }

        return html;
      },

      // Find totalNumber from the remote response
      // Only available in asynchronous mode
      findTotalNumberFromRemoteResponse: function(response) {
        var self = this;
        self.model.totalNumber = attributes.totalNumberLocator(response);
      },

      // Go to the specified page
      go: function(number, callback) {
        var self = this;
        var model = self.model;

        if (self.disabled) return;

        var pageNumber = number;
        pageNumber = parseInt(pageNumber);

        // Page number is out of bounds
        if (!pageNumber || pageNumber < 1) return;

        var pageSize = attributes.pageSize;
        var totalNumber = self.getTotalNumber();
        var totalPage = self.getTotalPage();

        // Page number is out of bounds
        if (totalNumber > 0) {
          if (pageNumber > totalPage) return;
        }

        // Pick data fragment in synchronous mode
        if (!self.isAsync) {
          render(self.getDataFragment(pageNumber));
          return;
        }

        var postData = {};
        var alias = attributes.alias || {};
        postData[alias.pageSize ? alias.pageSize : 'pageSize'] = pageSize;
        postData[alias.pageNumber ? alias.pageNumber : 'pageNumber'] = pageNumber;

        var ajaxParams = $.isFunction(attributes.ajax) ? attributes.ajax() : attributes.ajax;
        var formatAjaxParams = {
          type: 'get',
          cache: false,
          data: {},
          contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
          dataType: 'json',
          async: true
        };

        $.extend(true, formatAjaxParams, ajaxParams);
        $.extend(formatAjaxParams.data, postData);

        formatAjaxParams.url = attributes.dataSource;
        formatAjaxParams.success = function(response) {
          if (self.isDynamicTotalNumber) {
            self.findTotalNumberFromRemoteResponse(response);
          } else {
            self.model.totalNumber = attributes.totalNumber;
          }

          var finalData = self.filterDataByLocator(response);
          render(finalData);
        };
        formatAjaxParams.error = function(jqXHR, textStatus, errorThrown) {
          attributes.formatAjaxError && attributes.formatAjaxError(jqXHR, textStatus, errorThrown);
          self.enable();
        };

        self.disable();

        $.ajax(formatAjaxParams);

        function render(data) {
          // Will be invoked before paging
          if (self.callHook('beforePaging', pageNumber) === false) return false;

          // Pagination direction
          model.direction = typeof model.pageNumber === 'undefined' ? 0 : (pageNumber > model.pageNumber ? 1 : -1);

          model.pageNumber = pageNumber;

          self.render();

          if (self.disabled && self.isAsync) {
            // enable pagination
            self.enable();
          }

          // cache model data
          container.data('pagination').model = model;

          // format result data before callback invoked
          if (attributes.formatResult) {
            var cloneData = $.extend(true, [], data);
            if (!Helpers.isArray(data = attributes.formatResult(cloneData))) {
              data = cloneData;
            }
          }

          container.data('pagination').currentPageData = data;

          // invoke callback
          self.doCallback(data, callback);

          self.callHook('afterPaging', pageNumber);

          // pageNumber now is the first page
          if (pageNumber == 1) {
            self.callHook('afterIsFirstPage');
          }

          // pageNumber now is the last page
          if (pageNumber == self.getTotalPage()) {
            self.callHook('afterIsLastPage');
          }
        }
      },

      doCallback: function(data, customCallback) {
        var self = this;
        var model = self.model;

        if ($.isFunction(customCallback)) {
          customCallback(data, model);
        } else if ($.isFunction(attributes.callback)) {
          attributes.callback(data, model);
        }
      },

      destroy: function() {
        // Before destroy
        if (this.callHook('beforeDestroy') === false) return;

        this.model.el.remove();
        container.off();

        // Remove style element
        $('#paginationjs-style').remove();

        // After destroyed
        this.callHook('afterDestroy');
      },

      previous: function(callback) {
        this.go(this.model.pageNumber - 1, callback);
      },

      next: function(callback) {
        this.go(this.model.pageNumber + 1, callback);
      },

      disable: function() {
        var self = this;
        var source = self.isAsync ? 'async' : 'sync';

        // Before disabled
        if (self.callHook('beforeDisable', source) === false) return;

        self.disabled = true;
        self.model.disabled = true;

        // After disabled
        self.callHook('afterDisable', source);
      },

      enable: function() {
        var self = this;
        var source = self.isAsync ? 'async' : 'sync';

        // Before enabled
        if (self.callHook('beforeEnable', source) === false) return;

        self.disabled = false;
        self.model.disabled = false;

        // After enabled
        self.callHook('afterEnable', source);
      },

      refresh: function(callback) {
        this.go(this.model.pageNumber, callback);
      },

      show: function() {
        var self = this;

        if (self.model.el.is(':visible')) return;

        self.model.el.show();
      },

      hide: function() {
        var self = this;

        if (!self.model.el.is(':visible')) return;

        self.model.el.hide();
      },

      // Parse variables in the template
      replaceVariables: function(template, variables) {
        var formattedString;

        for (var key in variables) {
          var value = variables[key];
          var regexp = new RegExp('<%=\\s*' + key + '\\s*%>', 'img');

          formattedString = (formattedString || template).replace(regexp, value);
        }

        return formattedString;
      },

      // Get data fragment
      getDataFragment: function(number) {
        var pageSize = attributes.pageSize;
        var dataSource = attributes.dataSource;
        var totalNumber = this.getTotalNumber();

        var start = pageSize * (number - 1) + 1;
        var end = Math.min(number * pageSize, totalNumber);

        return dataSource.slice(start - 1, end);
      },

      // Get total number
      getTotalNumber: function() {
        return this.model.totalNumber || attributes.totalNumber || 0;
      },

      // Get total page
      getTotalPage: function() {
        return Math.ceil(this.getTotalNumber() / attributes.pageSize);
      },

      // Get locator
      getLocator: function(locator) {
        var result;

        if (typeof locator === 'string') {
          result = locator;
        } else if ($.isFunction(locator)) {
          result = locator();
        } else {
          throwError('"locator" is incorrect. (String | Function)');
        }

        return result;
      },

      // Filter data by "locator"
      filterDataByLocator: function(dataSource) {
        var locator = this.getLocator(attributes.locator);
        var filteredData;

        // Datasource is an Object, use "locator" to locate the true data
        if (Helpers.isObject(dataSource)) {
          try {
            $.each(locator.split('.'), function(index, item) {
              filteredData = (filteredData ? filteredData : dataSource)[item];
            });
          }
          catch (e) {
          }

          if (!filteredData) {
            throwError('dataSource.' + locator + ' is undefined.');
          } else if (!Helpers.isArray(filteredData)) {
            throwError('dataSource.' + locator + ' must be an Array.');
          }
        }

        return filteredData || dataSource;
      },

      // Parse dataSource
      parseDataSource: function(dataSource, callback) {
        var self = this;

        if (Helpers.isObject(dataSource)) {
          callback(attributes.dataSource = self.filterDataByLocator(dataSource));
        } else if (Helpers.isArray(dataSource)) {
          callback(attributes.dataSource = dataSource);
        } else if ($.isFunction(dataSource)) {
          attributes.dataSource(function(data) {
            if (!Helpers.isArray(data)) {
              throwError('The parameter of "done" Function should be an Array.');
            }
            self.parseDataSource.call(self, data, callback);
          });
        } else if (typeof dataSource === 'string') {
          if (/^https?|file:/.test(dataSource)) {
            attributes.ajaxDataType = 'jsonp';
          }
          callback(dataSource);
        } else {
          throwError('Unexpected type of "dataSource".');
        }
      },

      callHook: function(hook) {
        var paginationData = container.data('pagination');
        var result;

        var args = Array.prototype.slice.apply(arguments);
        args.shift();

        if (attributes[hook] && $.isFunction(attributes[hook])) {
          if (attributes[hook].apply(global, args) === false) {
            result = false;
          }
        }

        if (paginationData.hooks && paginationData.hooks[hook]) {
          $.each(paginationData.hooks[hook], function(index, item) {
            if (item.apply(global, args) === false) {
              result = false;
            }
          });
        }

        return result !== false;
      },

      observer: function() {
        var self = this;
        var el = self.model.el;

        // Go to specified page number
        container.on(eventPrefix + 'go', function(event, pageNumber, done) {
          pageNumber = parseInt($.trim(pageNumber));

          if (!pageNumber) return;

          if (!$.isNumeric(pageNumber)) {
            throwError('"pageNumber" is incorrect. (Number)');
          }

          self.go(pageNumber, done);
        });

        // Page number button click
        el.delegate('.J-paginationjs-page', 'click', function(event) {
          var current = $(event.currentTarget);
          var pageNumber = $.trim(current.attr('data-num'));

          if (!pageNumber || current.hasClass(attributes.disableClassName) || current.hasClass(attributes.activeClassName)) return;

          // Before page button clicked
          if (self.callHook('beforePageOnClick', event, pageNumber) === false) return false;

          self.go(pageNumber);

          // After page button clicked
          self.callHook('afterPageOnClick', event, pageNumber);

          if (!attributes.pageLink) return false;
        });

        // Previous button click
        el.delegate('.J-paginationjs-previous', 'click', function(event) {
          var current = $(event.currentTarget);
          var pageNumber = $.trim(current.attr('data-num'));

          if (!pageNumber || current.hasClass(attributes.disableClassName)) return;

          // Before previous clicked
          if (self.callHook('beforePreviousOnClick', event, pageNumber) === false) return false;

          self.go(pageNumber);

          // After previous clicked
          self.callHook('afterPreviousOnClick', event, pageNumber);

          if (!attributes.pageLink) return false;
        });

        // Next button click
        el.delegate('.J-paginationjs-next', 'click', function(event) {
          var current = $(event.currentTarget);
          var pageNumber = $.trim(current.attr('data-num'));

          if (!pageNumber || current.hasClass(attributes.disableClassName)) return;

          // Before next clicked
          if (self.callHook('beforeNextOnClick', event, pageNumber) === false) return false;

          self.go(pageNumber);

          // After next clicked
          self.callHook('afterNextOnClick', event, pageNumber);

          if (!attributes.pageLink) return false;
        });

        // Go button click
        el.delegate('.J-paginationjs-go-button', 'click', function(event) {
          var pageNumber = $('.J-paginationjs-go-pagenumber', el).val();

          // Before Go button clicked
          if (self.callHook('beforeGoButtonOnClick', event, pageNumber) === false) return false;

          container.trigger(eventPrefix + 'go', pageNumber);

          // After Go button clicked
          self.callHook('afterGoButtonOnClick', event, pageNumber);
        });

        // go input enter
        el.delegate('.J-paginationjs-go-pagenumber', 'keyup', function(event) {
          if (event.which === 13) {
            var pageNumber = $(event.currentTarget).val();

            // Before Go input enter
            if (self.callHook('beforeGoInputOnEnter', event, pageNumber) === false) return false;

            container.trigger(eventPrefix + 'go', pageNumber);

            // Regains focus
            $('.J-paginationjs-go-pagenumber', el).focus();

            // After Go input enter
            self.callHook('afterGoInputOnEnter', event, pageNumber);
          }
        });

        // Previous page
        container.on(eventPrefix + 'previous', function(event, done) {
          self.previous(done);
        });

        // Next page
        container.on(eventPrefix + 'next', function(event, done) {
          self.next(done);
        });

        // Disable
        container.on(eventPrefix + 'disable', function() {
          self.disable();
        });

        // Enable
        container.on(eventPrefix + 'enable', function() {
          self.enable();
        });

        // Refresh
        container.on(eventPrefix + 'refresh', function(event, done) {
          self.refresh(done);
        });

        // Show
        container.on(eventPrefix + 'show', function() {
          self.show();
        });

        // Hide
        container.on(eventPrefix + 'hide', function() {
          self.hide();
        });

        // Destroy
        container.on(eventPrefix + 'destroy', function() {
          self.destroy();
        });

        // Whether to load the default page
        var validTotalPage = Math.max(self.getTotalPage(), 1)
        var defaultPageNumber = attributes.pageNumber;
        // Default pageNumber should be 1 when totalNumber is dynamic
        if (self.isDynamicTotalNumber) {
          defaultPageNumber = 1;
        }
        if (attributes.triggerPagingOnInit) {
          container.trigger(eventPrefix + 'go', Math.min(defaultPageNumber, validTotalPage));
        }
      }
    };

    // Pagination has been initialized
    if (container.data('pagination') && container.data('pagination').initialized === true) {
      // Handle events
      if ($.isNumeric(options)) {
        // eg: container.pagination(5)
        container.trigger.call(this, eventPrefix + 'go', options, arguments[1]);
        return this;
      } else if (typeof options === 'string') {
        var args = Array.prototype.slice.apply(arguments);
        args[0] = eventPrefix + args[0];

        switch (options) {
          case 'previous':
          case 'next':
          case 'go':
          case 'disable':
          case 'enable':
          case 'refresh':
          case 'show':
          case 'hide':
          case 'destroy':
            container.trigger.apply(this, args);
            break;
          // Get selected page number
          case 'getSelectedPageNum':
            if (container.data('pagination').model) {
              return container.data('pagination').model.pageNumber;
            } else {
              return container.data('pagination').attributes.pageNumber;
            }
          // Get total page
          case 'getTotalPage':
            return Math.ceil(container.data('pagination').model.totalNumber / container.data('pagination').model.pageSize);
          // Get data of selected page
          case 'getSelectedPageData':
            return container.data('pagination').currentPageData;
          // Whether pagination has been disabled
          case 'isDisabled':
            return container.data('pagination').model.disabled === true;
          default:
            throwError('Unknown action: ' + options);
        }
        return this;
      } else {
        // Uninstall the old instance before initializing a new one
        uninstallPlugin(container);
      }
    } else {
      if (!Helpers.isObject(options)) throwError('Illegal options');
    }

    // Check parameters
    parameterChecker(attributes);

    pagination.initialize();

    return this;
  };

  // Instance defaults
  $.fn[pluginName].defaults = {

    // Data source
    // Array | String | Function | Object
    //dataSource: '',

    // String | Function
    //locator: 'data',

    // Find totalNumber from remote response, the totalNumber will be ignored when totalNumberLocator is specified
    // Function
    //totalNumberLocator: function() {},

    // Total entries
    totalNumber: 0,

    // Default page
    pageNumber: 1,

    // entries of per page
    pageSize: 10,

    // Page range (pages on both sides of the current page)
    pageRange: 2,

    // Whether to display the 'Previous' button
    showPrevious: true,

    // Whether to display the 'Next' button
    showNext: true,

    // Whether to display the page buttons
    showPageNumbers: true,

    showNavigator: false,

    // Whether to display the 'Go' input
    showGoInput: false,

    // Whether to display the 'Go' button
    showGoButton: false,

    // Page link
    pageLink: '',

    // 'Previous' text
    prevText: '&laquo;',

    // 'Next' text
    nextText: '&raquo;',

    // Ellipsis text
    ellipsisText: '...',

    // 'Go' button text
    goButtonText: 'Go',

    // Additional className for Pagination element
    //className: '',

    classPrefix: 'paginationjs',

    // Default active class
    activeClassName: 'active',

    // Default disable class
    disableClassName: 'disabled',

    //ulClassName: '',

    // Whether to insert inline style
    inlineStyle: true,

    formatNavigator: '<%= currentPage %> / <%= totalPage %>',

    formatGoInput: '<%= input %>',

    formatGoButton: '<%= button %>',

    // Pagination element's position in the container
    position: 'bottom',

    // Auto hide previous button when current page is the first page
    autoHidePrevious: false,

    // Auto hide next button when current page is the last page
    autoHideNext: false,

    //header: '',

    //footer: '',

    // Aliases for custom pagination parameters
    //alias: {},

    // Whether to trigger pagination at initialization
    triggerPagingOnInit: true,

    // Whether to hide pagination when less than one page
    hideWhenLessThanOnePage: false,

    showFirstOnEllipsisShow: true,

    showLastOnEllipsisShow: true,

    // Pagination callback
    callback: function() {}
  };

  // Hook register
  $.fn[pluginHookMethod] = function(hook, callback) {
    if (arguments.length < 2) {
      throwError('Missing argument.');
    }

    if (!$.isFunction(callback)) {
      throwError('callback must be a function.');
    }

    var container = $(this);
    var paginationData = container.data('pagination');

    if (!paginationData) {
      container.data('pagination', {});
      paginationData = container.data('pagination');
    }

    !paginationData.hooks && (paginationData.hooks = {});

    //paginationData.hooks[hook] = callback;
    paginationData.hooks[hook] = paginationData.hooks[hook] || [];
    paginationData.hooks[hook].push(callback);

  };

  // Static method
  $[pluginName] = function(selector, options) {
    if (arguments.length < 2) {
      throwError('Requires two parameters.');
    }

    var container;

    // 'selector' is a jQuery object
    if (typeof selector !== 'string' && selector instanceof jQuery) {
      container = selector;
    } else {
      container = $(selector);
    }

    if (!container.length) return;

    container.pagination(options);

    return container;
  };

  // ============================================================
  // helpers
  // ============================================================

  var Helpers = {};

  // Throw error
  function throwError(content) {
    throw new Error('Pagination: ' + content);
  }

  // Check parameters
  function parameterChecker(args) {
    if (!args.dataSource) {
      throwError('"dataSource" is required.');
    }

    if (typeof args.dataSource === 'string') {
      if (args.totalNumberLocator === undefined) {
        if (args.totalNumber === undefined) {
          throwError('"totalNumber" is required.');
        } else if (!$.isNumeric(args.totalNumber)) {
          throwError('"totalNumber" is incorrect. (Number)');
        }
      } else {
        if (!$.isFunction(args.totalNumberLocator)) {
          throwError('"totalNumberLocator" should be a Function.');
        }
      }
    } else if (Helpers.isObject(args.dataSource)) {
      if (typeof args.locator === 'undefined') {
        throwError('"dataSource" is an Object, please specify "locator".');
      } else if (typeof args.locator !== 'string' && !$.isFunction(args.locator)) {
        throwError('' + args.locator + ' is incorrect. (String | Function)');
      }
    }

    if (args.formatResult !== undefined && !$.isFunction(args.formatResult)) {
      throwError('"formatResult" should be a Function.');
    }
  }

  // uninstall plugin
  function uninstallPlugin(target) {
    var events = ['go', 'previous', 'next', 'disable', 'enable', 'refresh', 'show', 'hide', 'destroy'];

    // off events of old instance
    $.each(events, function(index, value) {
      target.off(eventPrefix + value);
    });

    // reset pagination data
    target.data('pagination', {});

    // remove old
    $('.paginationjs', target).remove();
  }

  // Object type detection
  function getObjectType(object, tmp) {
    return ( (tmp = typeof(object)) == "object" ? object == null && "null" || Object.prototype.toString.call(object).slice(8, -1) : tmp ).toLowerCase();
  }

  $.each(['Object', 'Array', 'String'], function(index, name) {
    Helpers['is' + name] = function(object) {
      return getObjectType(object) === name.toLowerCase();
    };
  });

  /*
   * export via AMD or CommonJS
   * */
  if (typeof define === 'function' && define.amd) {
    define(function() {
      return $;
    });
  }

})(this, window.jQuery);