Using localStorage instead of cookie

[madrang]

localStorage is made to store Client code information, Cookie is better use to store information that need to be shared with the server. So i think that to store Open/Selected node the default should be localStorage instead.

/*
 * jsTree storage plugin
 * Stores the currently opened/selected nodes in a localStorage and then restores them
 */
(function ($) {
    $.jstree.plugin("localStorage", {
        __init : function () {
            if(typeof localStorage === "undefined") { throw "jsTree localStorage: localStorage is not supported by your browser."; }

            var s = this._get_settings().localStorage;
            var tmp;

            if(!!s.save_loaded) {
                tmp = localStorage.getItem(s.save_loaded);
                if(tmp && tmp.length) { this.data.core.to_load = tmp.split(","); }
            }
            if(!!s.save_opened) {
                tmp = localStorage.getItem(s.save_opened);
                if(tmp && tmp.length) { this.data.core.to_open = tmp.split(","); }
            }
            if(!!s.save_selected) {
                tmp = localStorage.getItem(s.save_selected);
                if(tmp && tmp.length && this.data.ui) { this.data.ui.to_select = tmp.split(","); }
            }
            this.get_container()
                .one( ( this.data.ui ? "reselect" : "reopen" ) + ".jstree", $.proxy(function () {
                    this.get_container()
                        .bind("open_node.jstree close_node.jstree select_node.jstree deselect_node.jstree", $.proxy(function (e) { 
                                if(this._get_settings().localStorage.auto_save) { this.save_node((e.handleObj.namespace + e.handleObj.type).replace("jstree","")); }
                            }, this));
                }, this));
        },
        defaults : {
            save_loaded     : "jstree_load",
            save_opened     : "jstree_open",
            save_selected   : "jstree_select",
            auto_save       : true,
            localStorage_options    : {}
        },
        _fn : {
            save_node : function (c) {
                if(this.data.core.refreshing) { return; }
                var s = this._get_settings().localStorage;
                if(!c) { // if called manually and not by event
                    if(s.save_loaded) {
                        this.save_loaded();
                        localStorage.setItem(s.save_loaded, this.data.core.to_load.join(","));
                    }
                    if(s.save_opened) {
                        this.save_opened();
                        localStorage.setItem(s.save_opened, this.data.core.to_open.join(","));
                    }
                    if(s.save_selected && this.data.ui) {
                        this.save_selected();
                        localStorage.setItem(s.save_selected, this.data.ui.to_select.join(","));
                    }
                    return;
                }
                switch(c) {
                    case "open_node":
                    case "close_node":
                        if(!!s.save_opened) {
                            this.save_opened(); 
                            localStorage.setItem(s.save_opened, this.data.core.to_open.join(","));
                        }
                        if(!!s.save_loaded) {
                            this.save_loaded(); 
                            localStorage.setItem(s.save_loaded, this.data.core.to_load.join(",")); 
                        }
                        break;
                    case "select_node":
                    case "deselect_node":
                        if(!!s.save_selected && this.data.ui) { 
                            this.save_selected(); 
                            localStorage.setItem(s.save_selected, this.data.ui.to_select.join(",")); 
                        }
                        break;
                }
            }
        }
    });
    // include localStorage by default
    $.jstree.defaults.plugins.push("localStorage");
})(jQuery);

edit: tried to fix code formating issue.
edit2: found how to properly use "GitHub Flavored Markdown"

[vakata]

Thank you for the contribution! I will update the 1.0 branch very soon. I was also thinking about localStorage, but at the time of releasing the cookie plugin browser support was minimal, now things are different. Thank you for the great work. I was thinking of maybe using a minimal library that will support all major browser + a cookie fallback maybe (sorry if this is non-sense - I haven't looked at localStorage for some time now. Once again - thanks! I will release the 1.0 state plugin soon.

[vakata]

I added a helper for local storage (used jstorage), which tries to work with localstorage, globalstorage, userdata (for IE), and finally falls back to cookies.
I also just commited a small state plugin that seems to work, not thoroughly tested though.