source: sandbox/2.3-MailArchiver/calendar/js/dhtmlx/sources/ext/ext_limit.js @ 6779

scheduler.config.limit_start = new Date(-3999,0,0);
scheduler.config.limit_end   = new Date( 3999,0,0);
scheduler.config.limit_view  = false;

(function(){
        var before = null;
        
        scheduler.attachEvent("onBeforeViewChange",function(om,od,nm,nd){
                nd = nd||od; nm = nm||om;
                if (scheduler.config.limit_view){
                        if (nd.valueOf()>scheduler.config.limit_end.valueOf() || this.date.add(nd,1,nm)<=scheduler.config.limit_start.valueOf()){
                                setTimeout(function(){
                                        scheduler.setCurrentView(scheduler._date, nm);
                                },1);
                                return false;
                        }
                }
                return true;
        });
        var blocker = function(ev){
                var c = scheduler.config;
                var res = (ev.start_date.valueOf() >= c.limit_start.valueOf() && ev.end_date.valueOf() <= c.limit_end.valueOf());
                if (!res) {
                        scheduler._drag_id = null;
                        scheduler._drag_mode = null;
                        scheduler.callEvent("onLimitViolation",[ev.id, ev]);
                }
                return res;
        };
        
        scheduler.attachEvent("onBeforeDrag",function(id){
                if (!id) return true;
                return blocker(scheduler.getEvent(id));
        });
        scheduler.attachEvent("onClick", function (event_id, native_event_object){
                return blocker(scheduler.getEvent(event_id));
    });
        scheduler.attachEvent("onBeforeLightbox",function(id){
                var ev = scheduler.getEvent(id);
                before = [ev.start_date, ev.end_date];
                return blocker(ev);
        });     
        scheduler.attachEvent("onEventAdded",function(id){
                if (!id) return true;
                var ev = scheduler.getEvent(id);
                if (!blocker(ev)){
                        if (ev.start_date < scheduler.config.limit_start) {
                                ev.start_date = new Date(scheduler.config.limit_start);
                        }
                        if (ev.end_date > scheduler.config.limit_end) {
                                ev.end_date = new Date(scheduler.config.limit_end);
                                // as end date was changed need to recheck if event occuring during one day
                                ev._timed = this.is_one_day_event(ev); 
                        }
                        // in case if both start and end date were specified < scheduler.config.limit_star
                        if (ev.start_date > ev.end_date) { 
                                ev.end_date = this.date.add(ev.start_date, (this.config.event_duration||this.config.time_step), "minute");
                        }
                }
                return true;
        });
        scheduler.attachEvent("onEventChanged",function(id){
                if (!id) return true;
                var ev = scheduler.getEvent(id);
                if (!blocker(ev)){
                        if (!before) return false;
                        ev.start_date = before[0];
                        ev.end_date = before[1];
                        ev._timed=this.is_one_day_event(ev);
                };
                return true;
        });
        scheduler.attachEvent("onBeforeEventChanged",function(ev, native_object, is_new){
                return blocker(ev);
        });

})();