/*
 * 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 J��rn 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 2008-02-07 19:08:06Z joern.zaefferer $
 *
 */

;(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":
                        		if (settings.opened != 'undefined')
                                	var current = this.find("a").filter(function() { return this.href.toLowerCase() == settings.opened; });
                                else
                                	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);