ajaxpagination.js

// Generated by CoffeeScript 1.6.3
(function() {
  var root;

  root = typeof exports !== "undefined" && exports !== null ? exports : this;

  root.Page = function(parent, page_number) {
    var Page, _base;
    Page = (function() {
      function Page(parent, page_number) {
        this.parent = parent;
        this.page_number = page_number;
        this.items = null;
        this.start = (this.page_number - 1) * this.parent.items_by_page;
        this.stop = (this.page_number * this.parent.items_by_page) - 1;
        this.size = this.parent.items_by_page;
        this.show_after_fetch = false;
        this.fetch();
        this.show = function() {
          if ((this.parent.fetch_url === "") || (this.items != null)) {
            this.parent.show_page_callback(this);
            this.parent.current_page = this.page_number;
            return this.parent.update_pagination(this.page_number);
          } else {
            return this.show_after_fetch = true;
          }
        };
      }

      Page.prototype.fetch = function() {
        return this.parent.ajax({
          'start': this.start,
          'stop': this.stop,
          'size': this.size,
          'filter': this.parent.filter_text
        }, (function(page) {
          return function(data) {
            page.items = data;
            if (page.show_after_fetch) {
              page.show_after_fetch = false;
              return page.show(page);
            }
          };
        })(this));
      };

      return Page;

    })();
    if ((_base = parent.page_instances)[page_number] == null) {
      _base[page_number] = new Page(parent, page_number);
    }
    return parent.page_instances[page_number];
  };

  root.Pagination = function(pagination_id, fetch_url, show_page_callback, items_by_page, total_items, visible_pages) {
    var Pagination, _base, _base1;
    if (fetch_url == null) {
      fetch_url = '';
    }
    if (show_page_callback == null) {
      show_page_callback = function() {};
    }
    if (items_by_page == null) {
      items_by_page = 1;
    }
    if (total_items == null) {
      total_items = 100;
    }
    if (visible_pages == null) {
      visible_pages = 9;
    }
    Pagination = (function() {
      function Pagination(pagination_id, fetch_url, show_page_callback, items_by_page, total_items, visible_pages, filter_text) {
        this.pagination_id = pagination_id;
        this.fetch_url = fetch_url;
        this.show_page_callback = show_page_callback;
        this.items_by_page = items_by_page;
        this.total_items = total_items;
        this.visible_pages = visible_pages;
        this.filter_text = filter_text != null ? filter_text : '';
        this.page_instances = {};
        this.filtered_pagination = null;
        this.ajax({
          'info': true,
          'filter': this.filter_text
        }, (function(pagination) {
          return function(data) {
            if ((data != null)) {
              if ((data['ITEMS_BY_PAGE'] != null)) {
                pagination.items_by_page = parseInt(data['ITEMS_BY_PAGE']);
              }
              if ((data['TOTAL_ITEMS'] != null)) {
                pagination.total_items = parseInt(data['TOTAL_ITEMS']);
              }
              if ((data['VISIBLE_PAGES'] != null)) {
                pagination.visible_pages = parseInt(data['VISIBLE_PAGES']);
              }
            }
            return pagination.calc_pages();
          };
        })(this));
      }

      Pagination.prototype.calc_pages = function() {
        this.current_page = this.total_items > 0 ? 1 : 0;
        this.first_item = this.total_items > 0 ? 1 : 0;
        this.last_item = this.total_items;
        this.first_page = this.total_items > 0 ? 1 : 0;
        this.total_pages = Math.ceil(this.total_items / this.items_by_page);
        this.last_page = this.total_pages;
        return this.show_page(this.first_item);
      };

      Pagination.prototype.ajax = function(data, callback) {
        if (this.fetch_url !== '') {
          if (($.zepto != null)) {
            return $.ajax({
              url: this.fetch_url,
              type: 'GET',
              dataType: 'json',
              data: data,
              'complete': callback
            });
          } else {
            return $.ajax({
              url: this.fetch_url,
              type: 'GET',
              dataType: 'json',
              data: data
            }).done(callback);
          }
        } else {
          return callback();
        }
      };

      Pagination.prototype.pagination_items = function(current_page) {
        var add_page, i, pagination_visible, _i, _j, _k, _l, _ref, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7;
        visible_pages = this.visible_pages - 2;
        pagination_visible = [];
        add_page = function(i, type, position) {
          var item;
          if (type == null) {
            type = 'page';
          }
          if (position == null) {
            position = null;
          }
          if (type === 'page') {
            item = {
              'is_link': i !== current_page,
              'number': i,
              'content': "" + i,
              'class': i === current_page ? 'current' : 'page'
            };
          } else if (type === 'prev') {
            item = {
              'is_link': true,
              'number': i,
              'content': "◀",
              'class': 'prev'
            };
          } else if (type === 'next') {
            item = {
              'is_link': true,
              'number': i,
              'content': "▶",
              'class': 'next'
            };
          } else if (type === 'prev_disabled') {
            item = {
              'is_link': false,
              'number': i,
              'content': "◀",
              'class': 'prev disabled'
            };
          } else if (type === 'next_disabled') {
            item = {
              'is_link': false,
              'number': i,
              'content': "▶",
              'class': 'next disabled'
            };
          } else if (type === 'dots') {
            item = {
              'is_link': false,
              'number': i,
              'content': "...",
              'class': 'dots'
            };
          }
          if ((position != null)) {
            return pagination_visible.splice(position, 0, item);
          } else {
            return pagination_visible.push(item);
          }
        };
        if (this.total_pages <= visible_pages) {
          for (i = _i = _ref = this.first_page, _ref1 = this.total_pages; _ref <= _ref1 ? _i <= _ref1 : _i >= _ref1; i = _ref <= _ref1 ? ++_i : --_i) {
            new root.Page(this, i);
            add_page(i);
          }
        } else {
          if (current_page <= (Math.floor(visible_pages / 2) + 1)) {
            for (i = _j = _ref2 = this.first_page, _ref3 = visible_pages - 2; _ref2 <= _ref3 ? _j <= _ref3 : _j >= _ref3; i = _ref2 <= _ref3 ? ++_j : --_j) {
              new root.Page(this, i);
              add_page(i);
            }
            add_page(0, 'dots');
            new root.Page(this, this.last_page);
            add_page(this.last_page);
          } else if (current_page > (this.total_pages - (Math.floor(visible_pages / 2) + 1))) {
            for (i = _k = _ref4 = this.total_pages - (visible_pages - 3), _ref5 = this.total_pages; _ref4 <= _ref5 ? _k <= _ref5 : _k >= _ref5; i = _ref4 <= _ref5 ? ++_k : --_k) {
              new root.Page(this, i);
              add_page(i);
            }
            add_page(0, 'dots', 0);
            new root.Page(this, this.first_page);
            add_page(this.first_page, 'page', 0);
          } else {
            for (i = _l = _ref6 = current_page - (Math.floor(visible_pages / 2) - 2), _ref7 = current_page + (Math.floor(visible_pages / 2) - 2); _ref6 <= _ref7 ? _l <= _ref7 : _l >= _ref7; i = _ref6 <= _ref7 ? ++_l : --_l) {
              new root.Page(this, i);
              add_page(i);
            }
            add_page(0, 'dots', 0);
            new root.Page(this, this.first_page);
            add_page(this.first_page, 'page', 0);
            add_page(0, 'dots');
            new root.Page(this, this.last_page);
            add_page(this.last_page);
          }
        }
        if (current_page > this.first_page) {
          new root.Page(this, current_page - 1);
          add_page(current_page - 1, 'prev', 0);
        } else {
          add_page(0, 'prev_disabled', 0);
        }
        if (current_page < this.last_page) {
          new root.Page(this, current_page + 1);
          add_page(current_page + 1, 'next');
        } else {
          add_page(0, 'next_disabled');
        }
        return pagination_visible;
      };

      Pagination.prototype.update_pagination = function(page_number) {
        var $item, $li, $pagination, $ul, page, _i, _len, _ref, _results;
        $pagination = $(this.pagination_id);
        $pagination.html('');
        $ul = $('<ul>');
        $ul.addClass('pagination');
        $pagination.append($ul);
        _ref = this.pagination_items(page_number);
        _results = [];
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          page = _ref[_i];
          $li = $('<li>');
          $ul.append($li);
          if (page.is_link) {
            $item = $('<a href="#">');
            $item.attr('data-page', page.number);
            $item.on('click', (function(pagination) {
              return function(e) {
                e.preventDefault();
                return pagination.show_page(parseInt($(this).attr('data-page')));
              };
            })(this));
          } else {
            $item = $('<span>');
          }
          $item.addClass(page["class"]);
          $item.html(page.content);
          _results.push($li.html($item));
        }
        return _results;
      };

      Pagination.prototype.show_first = function() {
        return this.show_page(this.first_page);
      };

      Pagination.prototype.show_last = function() {
        return this.show_page(this.last_page);
      };

      Pagination.prototype.has_prev = function() {
        return this.current_page > this.first_page;
      };

      Pagination.prototype.has_next = function() {
        return this.current_page < this.last_page;
      };

      Pagination.prototype.show_prev = function() {
        if (this.has_prev()) {
          return this.show_page(this.current_page - 1);
        }
      };

      Pagination.prototype.show_next = function() {
        if (this.has_next()) {
          return this.show_page(this.current_page + 1);
        }
      };

      Pagination.prototype.show_page = function(page_number) {
        var page;
        page = new root.Page(this, page_number);
        return page.show();
      };

      Pagination.prototype.filter = function(filter_text) {
        if (filter_text === '') {
          return this.show_page(this.current_page);
        } else {
          return this.filtered_pagination = new Pagination(this.pagination_id, this.fetch_url, this.show_page_callback, this.items_by_page, this.total_items, this.visible_pages, filter_text);
        }
      };

      return Pagination;

    })();
    if ((_base = root.Pagination).instance == null) {
      _base.instance = {};
    }
    if ((_base1 = root.Pagination.instance)[pagination_id] == null) {
      _base1[pagination_id] = new Pagination(pagination_id, fetch_url, show_page_callback, items_by_page, total_items, visible_pages);
    }
    return root.Pagination.instance[pagination_id];
  };

  $.extend($.fn, {
    ajaxpagination: function(fetch_url, show_page_callback, items_by_page, total_items, visible_pages) {
      var el, paginations;
      if (fetch_url == null) {
        fetch_url = '';
      }
      if (show_page_callback == null) {
        show_page_callback = function() {};
      }
      if (items_by_page == null) {
        items_by_page = 1;
      }
      if (total_items == null) {
        total_items = 100;
      }
      if (visible_pages == null) {
        visible_pages = 9;
      }
      paginations = (function() {
        var _i, _len, _results;
        _results = [];
        for (_i = 0, _len = this.length; _i < _len; _i++) {
          el = this[_i];
          _results.push(new root.Pagination('#' + $(el).attr('id'), fetch_url, show_page_callback, items_by_page, total_items, visible_pages));
        }
        return _results;
      }).call(this);
      if (paginations.length === 1) {
        paginations = paginations[0];
      }
      return paginations;
    }
  });

}).call(this);