+ , applyPlacement: function(offset, placement){
+ var $tip = this.tip()
+ , width = $tip[0].offsetWidth
+ , height = $tip[0].offsetHeight
+ , actualWidth
+ , actualHeight
+ , delta
+ , replace
+
+ $tip
+ .offset(offset)
+ .addClass(placement)
+ .addClass('in')
+
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+
+ if (placement == 'top' && actualHeight != height) {
+ offset.top = offset.top + height - actualHeight
+ replace = true
+ }
+
+ if (placement == 'bottom' || placement == 'top') {
+ delta = 0
+
+ if (offset.left < 0){
+ delta = offset.left * -2
+ offset.left = 0
+ $tip.offset(offset)
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+ }
+
+ this.replaceArrow(delta - width + actualWidth, actualWidth, 'left')
+ } else {
+ this.replaceArrow(actualHeight - height, actualHeight, 'top')
+ }
+
+ if (replace) $tip.offset(offset)
+ }
+
+ , replaceArrow: function(delta, dimension, position){
+ this
+ .arrow()
+ .css(position, delta ? (50 * (1 - delta / dimension) + "%") : '')
+ }
+