/*
 * 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);