/*

 * 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: jquery.treeview.js 4684 2010-02-07 19:08:06Z joern.zaefferer $

 * updated by Aurelien Campeas, 2010-09-01, to handle top-level ajax loads

 *

 */

(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) {

                this.filter(":last-child:not(ul)").addClass(CLASSES.last);

                this.filter((settings.collapsed ? "" : "." + CLASSES.closed) + ":not(." + CLASSES.open + ")").find(">ul").hide();

            }

            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) {

                this.filter(":has(>ul:hidden)").addClass(CLASSES.expandable).replaceClass(CLASSES.last, CLASSES.lastExpandable);

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

                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);

                });

            }

            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);

                };

            }

            function treeController(tree, control) {

                function handler(filter) {

                    return function() {

                        toggler.apply($("div." + CLASSES.hitarea, tree).filter(function() {

                            return filter ? $(this).parent("." + filter).length : true;

                        }));

                        return false;

                    };

                }

                $("a:eq(0)", control).click(handler(CLASSES.collapsable));

                $("a:eq(1)", control).click(handler(CLASSES.expandable));

                $("a:eq(2)", control).click(handler());

            }

            function toggler() {

                $(this).parent().find(">.hitarea").swapClass(CLASSES.collapsableHitarea, CLASSES.expandableHitarea).swapClass(CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea).end().swapClass(CLASSES.collapsable, CLASSES.expandable).swapClass(CLASSES.lastCollapsable, CLASSES.lastExpandable).find(">ul").heightToggle(settings.animated, settings.toggle);

                if (settings.unique) {

                    $(this).parent().siblings().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"]();

                    });

                }

            }

            this.addClass("treeview");

            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 (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);

            });

        }

    });

    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"

    };

    $.fn.Treeview = $.fn.treeview;

})(jQuery);