/*
 * Treeview 1.4 - jQuery plugin to hide and show branches of a tree
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
 * http://docs.jquery.com/Plugins/Treeview
 *
 * Copyright (c) 2007 Jörn Zaefferer
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 * Revision: $Id: jqtre.js 101 2009-12-02 09:20:18Z qnub $
 *
 */

;
(function($) {

  $.extend($.fn, {
    swapClass : function(c1, c2) {
      var c1Elements = this.filter('.' + c1);
      this.filter('.' + c2).removeClass(c2).addClass(c1);
      c1Elements.removeClass(c1).addClass(c2);
      return this;
    },
    replaceClass : function(c1, c2) {
      return this.filter('.' + c1).removeClass(c1).addClass(c2).end();
    },
    hoverClass : function(className) {
      className = className || "hover";
      return this.hover(function() {
        $(this).addClass(className);
      }, function() {
        $(this).removeClass(className);
      });
    },
    heightToggle : function(animated, callback) {
      animated ? this.animate( {
        height : "toggle"
      }, animated, callback) : this.each(function() {
        jQuery(this)[jQuery(this).is(":hidden") ? "show" : "hide"]();
      });
      if (callback)
        callback.apply(this, arguments);
    },
    heightHide : function(animated, callback) {
      if (animated) {
        this.animate( {
          height : "hide"
        }, animated, callback);
      } else {
        this.hide();
        if (callback)
          this.each(callback);
      }
    },
    prepareBranches : function(settings) {
      if (!settings.prerendered) {
        // mark last tree items
    this.filter(":last-child:not(ul)").addClass(CLASSES.last);
    // collapse whole tree, or only those marked as closed, anyway
    // except those marked as open
    this.filter(
        (settings.collapsed ? "" : "." + CLASSES.closed) + ":not(."
            + CLASSES.open + ")").find(">ul").hide();
  }
  // return all items with sublists
  return this.filter(":has(>ul)");
},
applyClasses : function(settings, toggler) {
  this.filter(":has(>ul):not(:has(>a))").find(">span").click(function(event) {
    toggler.apply($(this).next());
  }).add($("a", this)).hoverClass();

  if (!settings.prerendered) {
    // handle closed ones first
    this.filter(":has(>ul:hidden)").addClass(CLASSES.expandable)
        .replaceClass(CLASSES.last, CLASSES.lastExpandable);

    // handle open ones
    this.not(":has(>ul:hidden)").addClass(CLASSES.collapsable)
        .replaceClass(CLASSES.last, CLASSES.lastCollapsable);

    // create hitarea
    this.prepend("<div class=\"" + CLASSES.hitarea + "\"/>").find(
        "div." + CLASSES.hitarea).each(function() {
      var classes = "";
      $.each($(this).parent().attr("class").split(" "), function() {
        classes += this + "-hitarea ";
      });
      $(this).addClass(classes);
    });
  }

  // apply event to hitarea
  this.find("div." + CLASSES.hitarea).click(toggler);
},
treeview : function(settings) {

  settings = $.extend( {
    cookieId : "treeview"
  }, settings);

  if (settings.add) {
    return this.trigger("add", [ settings.add ]);
  }

  if (settings.toggle) {
    var callback = settings.toggle;
    settings.toggle = function() {
      return callback.apply($(this).parent()[0], arguments);
    };
  }

  // factory for treecontroller
    function treeController(tree, control) {
      // factory for click handlers
      function handler(filter) {
        return function() {
          // reuse toggle event handler, applying the elements to
          // toggle
          // start searching for all hitareas
          toggler
              .apply($("div." + CLASSES.hitarea, tree).filter(
                  function() {
                    // for plain toggle, no filter is
                    // provided, otherwise we need to check
                    // the parent element
                    return filter ? $(this).parent(
                        "." + filter).length : true;
                  }));
          return false;
        };
      }
      // click on first element to collapse tree
      $("a:eq(0)", control).click(handler(CLASSES.collapsable));
      // click on second to expand tree
      $("a:eq(1)", control).click(handler(CLASSES.expandable));
      // click on third to toggle tree
      $("a:eq(2)", control).click(handler());
    }

    // handle toggle event
    function toggler() {
      $(this).parent()
          // swap classes for hitarea
          .find(">.hitarea").swapClass(CLASSES.collapsableHitarea,
              CLASSES.expandableHitarea).swapClass(
              CLASSES.lastCollapsableHitarea,
              CLASSES.lastExpandableHitarea).end()
          // swap classes for parent li
          .swapClass(CLASSES.collapsable, CLASSES.expandable)
          .swapClass(CLASSES.lastCollapsable, CLASSES.lastExpandable)
          // find child lists
          .find(">ul")
          // toggle them
          .heightToggle(settings.animated, settings.toggle);
      if (settings.unique) {
        $(this).parent()
            .siblings()
            // swap classes for hitarea
            .find(">.hitarea").replaceClass(
                CLASSES.collapsableHitarea,
                CLASSES.expandableHitarea).replaceClass(
                CLASSES.lastCollapsableHitarea,
                CLASSES.lastExpandableHitarea).end()
            .replaceClass(CLASSES.collapsable, CLASSES.expandable)
            .replaceClass(CLASSES.lastCollapsable,
                CLASSES.lastExpandable).find(">ul").heightHide(
                settings.animated, settings.toggle);
      }
    }

    function serialize() {
      function binary(arg) {
        return arg ? 1 : 0;
      }
      var data = [];
      branches.each(function(i, e) {
        data[i] = $(e).is(":has(>ul:visible)") ? 1 : 0;
      });
      $.cookie(settings.cookieId, data.join(""));
    }

    function deserialize() {
      var stored = $.cookie(settings.cookieId);
      if (stored) {
        var data = stored.split("");
        branches.each(function(i, e) {
          $(e).find(">ul")[parseInt(data[i]) ? "show" : "hide"]();
        });
      }
    }

    // add treeview class to activate styles
    this.addClass("treeview");

    // prepare branches and find all tree items with child lists
    var branches = this.find("li").prepareBranches(settings);

    switch (settings.persist) {
    case "cookie":
      var toggleCallback = settings.toggle;
      settings.toggle = function() {
        serialize();
        if (toggleCallback) {
          toggleCallback.apply(this, arguments);
        }
      };
      deserialize();
      break;
    case "location":
      var current = this.find("a").filter(function() {
        return this.href.toLowerCase() == location.href.toLowerCase();
      });
      if (current.length) {
        current.addClass("selected").parents("ul, li").add(
            current.next()).show();
      }
      break;
    }

    branches.applyClasses(settings, toggler);

    // if control option is set, create the treecontroller and show it
    if (settings.control) {
      treeController(this, settings.control);
      $(settings.control).show();
    }

    return this.bind("add", function(event, branches) {
      $(branches).prev().removeClass(CLASSES.last).removeClass(
          CLASSES.lastCollapsable)
          .removeClass(CLASSES.lastExpandable).find(">.hitarea")
          .removeClass(CLASSES.lastCollapsableHitarea).removeClass(
              CLASSES.lastExpandableHitarea);
      $(branches).find("li").andSelf().prepareBranches(settings)
          .applyClasses(settings, toggler);
    });
  }
  });

  // classes used by the plugin
  // need to be styled via external stylesheet, see first example
  var CLASSES = $.fn.treeview.classes = {
    open : "open",
    closed : "closed",
    expandable : "expandable",
    expandableHitarea : "expandable-hitarea",
    lastExpandableHitarea : "lastExpandable-hitarea",
    collapsable : "collapsable",
    collapsableHitarea : "collapsable-hitarea",
    lastCollapsableHitarea : "lastCollapsable-hitarea",
    lastCollapsable : "lastCollapsable",
    lastExpandable : "lastExpandable",
    last : "last",
    hitarea : "hitarea"
  };

  // provide backwards compability
  $.fn.Treeview = $.fn.treeview;

})(jQuery);