/*
 * collapse plugin for jquery
 * --
 * source: http://github.com/danielstocks/jquery-collapse/
 * site: http://webcloud.se/jquery-collapse
 *
 * @author daniel stocks (http://webcloud.se)
 * copyright 2013, daniel stocks
 * released under the mit, bsd, and gpl licenses.
 */
/* �������������֮�� www.lanrenzhijia.com */
(function($) {

  // constructor
  function collapse (el, options) {
    options = options || {};
    var _this = this,
      query = options.query || "> :even";

    $.extend(_this, {
      $el: el,
      options : options,
      sections: [],
      isaccordion : options.accordion || false,
      db : options.persist ? jquerycollapsestorage(el[0].id) : false
    });

    // figure out what sections are open if storage is used
    _this.states = _this.db ? _this.db.read() : [];

    // for every pair of elements in given
    // element, create a section
    _this.$el.find(query).each(function() {
      var section = new section($(this), _this);
      _this.sections.push(section);

      // check current state of section
      var state = _this.states[section._index()];
      if(state === 0) {
        section.$summary.removeclass("open");
      }
      if(state === 1) {
        section.$summary.addclass("open");
      }

      // show or hide accordingly
      if(section.$summary.hasclass("open")) {
        section.open(true);
      }
      else {
        section.close(true);
      }
    });

    // capute all the clicks!
    (function(scope) {
      _this.$el.on("click", "[data-collapse-summary]",
        $.proxy(_this.handleclick, scope));
    }(_this));
  }

  collapse.prototype = {
    handleclick: function(e) {
      e.preventdefault();
      var sections = this.sections,
        l = sections.length;
      while(l--) {
        if($.contains(sections[l].$summary[0], e.target)) {
          sections[l].toggle();
          break;
        }
      }
    },
    open : function(eq) {
      if(isfinite(eq)) return this.sections[eq].open();
      $.each(this.sections, function() {
        this.open();
      });
    },
    close: function(eq) {
      if(isfinite(eq)) return this.sections[eq].close();
      $.each(this.sections, function() {
        this.close();
      });
    }
  };

  // section constructor
  function section($el, parent) {
    $.extend(this, {
      isopen : false,
      $summary : $el
        .attr("data-collapse-summary", "")
        .wrapinner('<a href="#"/>'),
      $details : $el.next(),
      options: parent.options,
      parent: parent
    });
  }

  section.prototype = {
    toggle : function() {
      if(this.isopen) this.close();
      else this.open();
    },
    close: function(bypass) {
      this._changestate("close", bypass);
    },
    open: function(bypass) {
      var _this = this;
      if(_this.options.accordion && !bypass) {
        $.each(_this.parent.sections, function() {
          this.close();
        });
      }
      _this._changestate("open", bypass);
    },
    _index: function() {
      return $.inarray(this, this.parent.sections);
    },
    _changestate: function(state, bypass) {

      var _this = this;
      _this.isopen = state == "open";
      if($.isfunction(_this.options[state]) && !bypass) {
        _this.options[state].apply(_this.$details);
      } else {
        if(_this.isopen) _this.$details.show();
        else _this.$details.hide();
      }
      _this.$summary.removeclass("open close").addclass(state);
      _this.$details.attr("aria-hidden", state == "close");
      _this.parent.$el.trigger(state, _this);
      if(_this.parent.db) {
        _this.parent.db.write(_this._index(), _this.isopen);
      }
    }
  };

  // expose in jquery api
  $.fn.extend({
    collapse: function(options, scan) {
      var nodes = (scan) ? $("body").find("[data-collapse]") : $(this);
      return nodes.each(function() {
        var settings = (scan) ? {} : options,
          values = $(this).attr("data-collapse") || "";
        $.each(values.split(" "), function(i,v) {
          if(v) settings[v] = true;
        });
        new jquerycollapse($(this), settings);
      });
    }
  });

  //jquery dom ready
  $(function() {
    $.fn.collapse(false, true);
  });

  // expose constructor to
  // global namespace
  jquerycollapse = collapse;

})(window.jquery);
/* �������������֮�� www.lanrenzhijia.com */