click: function()

in TestApplications/Web/js/lib/components/bootstrap-datepicker.js [903:1013]
110 lines of code
34 McCabe index (conditional complexity)

		click: function(e){
			e.preventDefault();
			var target = $(e.target).closest('span, td, th'),
				year, month, day;
			if (target.length === 1){
				switch (target[0].nodeName.toLowerCase()){
					case 'th':
						switch (target[0].className){
							case 'datepicker-switch':
								this.showMode(1);
								break;
							case 'prev':
							case 'next':
								var dir = DPGlobal.modes[this.viewMode].navStep * (target[0].className === 'prev' ? -1 : 1);
								switch (this.viewMode){
									case 0:
										this.viewDate = this.moveMonth(this.viewDate, dir);
										this._trigger('changeMonth', this.viewDate);
										break;
									case 1:
									case 2:
										this.viewDate = this.moveYear(this.viewDate, dir);
										if (this.viewMode === 1)
											this._trigger('changeYear', this.viewDate);
										break;
								}
								this.fill();
								break;
							case 'today':
								var date = new Date();
								date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);

								this.showMode(-2);
								var which = this.o.todayBtn === 'linked' ? null : 'view';
								this._setDate(date, which);
								break;
							case 'clear':
								var element;
								if (this.isInput)
									element = this.element;
								else if (this.component)
									element = this.element.find('input');
								if (element)
									element.val("").change();
								this.update();
								this._trigger('changeDate');
								if (this.o.autoclose)
									this.hide();
								break;
						}
						break;
					case 'span':
						if (!target.is('.disabled')){
							this.viewDate.setUTCDate(1);
							if (target.is('.month')){
								day = 1;
								month = target.parent().find('span').index(target);
								year = this.viewDate.getUTCFullYear();
								this.viewDate.setUTCMonth(month);
								this._trigger('changeMonth', this.viewDate);
								if (this.o.minViewMode === 1){
									this._setDate(UTCDate(year, month, day));
								}
							}
							else {
								day = 1;
								month = 0;
								year = parseInt(target.text(), 10)||0;
								this.viewDate.setUTCFullYear(year);
								this._trigger('changeYear', this.viewDate);
								if (this.o.minViewMode === 2){
									this._setDate(UTCDate(year, month, day));
								}
							}
							this.showMode(-1);
							this.fill();
						}
						break;
					case 'td':
						if (target.is('.day') && !target.is('.disabled')){
							day = parseInt(target.text(), 10)||1;
							year = this.viewDate.getUTCFullYear();
							month = this.viewDate.getUTCMonth();
							if (target.is('.old')){
								if (month === 0){
									month = 11;
									year -= 1;
								}
								else {
									month -= 1;
								}
							}
							else if (target.is('.new')){
								if (month === 11){
									month = 0;
									year += 1;
								}
								else {
									month += 1;
								}
							}
							this._setDate(UTCDate(year, month, day));
						}
						break;
				}
			}
			if (this.picker.is(':visible') && this._focused_from){
				$(this._focused_from).focus();
			}
			delete this._focused_from;
		},