keydown: function()

in TestApplications/Web/js/lib/components/bootstrap-datepicker.js [1113:1230]
118 lines of code
41 McCabe index (conditional complexity)

		keydown: function(e){
			if (this.picker.is(':not(:visible)')){
				if (e.keyCode === 27) // allow escape to hide and re-show picker
					this.show();
				return;
			}
			var dateChanged = false,
				dir, newDate, newViewDate,
				focusDate = this.focusDate || this.viewDate;
			switch (e.keyCode){
				case 27: // escape
					if (this.focusDate){
						this.focusDate = null;
						this.viewDate = this.dates.get(-1) || this.viewDate;
						this.fill();
					}
					else
						this.hide();
					e.preventDefault();
					break;
				case 37: // left
				case 39: // right
					if (!this.o.keyboardNavigation)
						break;
					dir = e.keyCode === 37 ? -1 : 1;
					if (e.ctrlKey){
						newDate = this.moveYear(this.dates.get(-1) || UTCToday(), dir);
						newViewDate = this.moveYear(focusDate, dir);
						this._trigger('changeYear', this.viewDate);
					}
					else if (e.shiftKey){
						newDate = this.moveMonth(this.dates.get(-1) || UTCToday(), dir);
						newViewDate = this.moveMonth(focusDate, dir);
						this._trigger('changeMonth', this.viewDate);
					}
					else {
						newDate = new Date(this.dates.get(-1) || UTCToday());
						newDate.setUTCDate(newDate.getUTCDate() + dir);
						newViewDate = new Date(focusDate);
						newViewDate.setUTCDate(focusDate.getUTCDate() + dir);
					}
					if (this.dateWithinRange(newDate)){
						this.focusDate = this.viewDate = newViewDate;
						this.setValue();
						this.fill();
						e.preventDefault();
					}
					break;
				case 38: // up
				case 40: // down
					if (!this.o.keyboardNavigation)
						break;
					dir = e.keyCode === 38 ? -1 : 1;
					if (e.ctrlKey){
						newDate = this.moveYear(this.dates.get(-1) || UTCToday(), dir);
						newViewDate = this.moveYear(focusDate, dir);
						this._trigger('changeYear', this.viewDate);
					}
					else if (e.shiftKey){
						newDate = this.moveMonth(this.dates.get(-1) || UTCToday(), dir);
						newViewDate = this.moveMonth(focusDate, dir);
						this._trigger('changeMonth', this.viewDate);
					}
					else {
						newDate = new Date(this.dates.get(-1) || UTCToday());
						newDate.setUTCDate(newDate.getUTCDate() + dir * 7);
						newViewDate = new Date(focusDate);
						newViewDate.setUTCDate(focusDate.getUTCDate() + dir * 7);
					}
					if (this.dateWithinRange(newDate)){
						this.focusDate = this.viewDate = newViewDate;
						this.setValue();
						this.fill();
						e.preventDefault();
					}
					break;
				case 32: // spacebar
					// Spacebar is used in manually typing dates in some formats.
					// As such, its behavior should not be hijacked.
					break;
				case 13: // enter
					focusDate = this.focusDate || this.dates.get(-1) || this.viewDate;
					this._toggle_multidate(focusDate);
					dateChanged = true;
					this.focusDate = null;
					this.viewDate = this.dates.get(-1) || this.viewDate;
					this.setValue();
					this.fill();
					if (this.picker.is(':visible')){
						e.preventDefault();
						if (this.o.autoclose)
							this.hide();
					}
					break;
				case 9: // tab
					this.focusDate = null;
					this.viewDate = this.dates.get(-1) || this.viewDate;
					this.fill();
					this.hide();
					break;
			}
			if (dateChanged){
				if (this.dates.length)
					this._trigger('changeDate');
				else
					this._trigger('clearDate');
				var element;
				if (this.isInput){
					element = this.element;
				}
				else if (this.component){
					element = this.element.find('input');
				}
				if (element){
					element.change();
				}
			}
		},