define(["jquery","core/autoscroll"],function(a,b){var c={eventCaptureOptions:{passive:!1,capture:!0},dragProxy:null,onMove:null,onDrop:null,initialPosition:null,initialX:null,initialY:null,touching:null,prepare:function(a){a.preventDefault();var b;if(b="touchstart"===a.type?null===c.touching&&a.changedTouches.length>0:1===a.which){var d=c.getEventXY(a);return d.start=!0,d}return{start:!1}},start:function(a,d,e,f){var g=c.getEventXY(a);switch(c.initialX=g.x,c.initialY=g.y,c.initialPosition=d.offset(),c.dragProxy=d,c.onMove=e,c.onDrop=f,a.type){case"mousedown":c.addEventSpecial("mousemove",c.mouseMove),c.addEventSpecial("mouseup",c.mouseUp);break;case"touchstart":c.addEventSpecial("touchend",c.touchEnd),c.addEventSpecial("touchcancel",c.touchEnd),c.addEventSpecial("touchmove",c.touchMove),c.touching=a.changedTouches[0].identifier;break;default:throw new Error("Unexpected event type: "+a.type)}b.start(c.scroll)},addEventSpecial:function(a,b){try{window.addEventListener(a,b,c.eventCaptureOptions)}catch(d){c.eventCaptureOptions=!0,window.addEventListener(a,b,c.eventCaptureOptions)}},getEventXY:function(a){switch(a.type){case"touchstart":return{x:a.changedTouches[0].pageX,y:a.changedTouches[0].pageY};case"mousedown":return{x:a.pageX,y:a.pageY};default:throw new Error("Unexpected event type: "+a.type)}},touchMove:function(a){a.preventDefault();for(var b=0;b<a.changedTouches.length;b++)a.changedTouches[b].identifier===c.touching&&c.handleMove(a.changedTouches[b].pageX,a.changedTouches[b].pageY)},mouseMove:function(a){c.handleMove(a.pageX,a.pageY)},handleMove:function(b,d){var e=c.dragProxy.offset(),f=e.top-parseInt(c.dragProxy.css("top")),g=e.left-parseInt(c.dragProxy.css("left")),h=a(document).height()-c.dragProxy.outerHeight()-f,i=a(document).width()-c.dragProxy.outerWidth()-g,j=-f,k=-g,l=c.initialPosition,m={top:Math.max(j,Math.min(h,l.top+(d-c.initialY)-f)),left:Math.max(k,Math.min(i,l.left+(b-c.initialX)-g))};c.dragProxy.css(m),c.onMove(b,d,c.dragProxy)},touchEnd:function(a){a.preventDefault();for(var b=0;b<a.changedTouches.length;b++)a.changedTouches[b].identifier===c.touching&&c.handleEnd(a.changedTouches[b].pageX,a.changedTouches[b].pageY)},mouseUp:function(a){c.handleEnd(a.pageX,a.pageY)},handleEnd:function(a,d){null!==c.touching?(window.removeEventListener("touchend",c.touchEnd,c.eventCaptureOptions),window.removeEventListener("touchcancel",c.touchEnd,c.eventCaptureOptions),window.removeEventListener("touchmove",c.touchMove,c.eventCaptureOptions),c.touching=null):(window.removeEventListener("mousemove",c.mouseMove,c.eventCaptureOptions),window.removeEventListener("mouseup",c.mouseUp,c.eventCaptureOptions)),b.stop(),c.onDrop(a,d,c.dragProxy)},scroll:function(b){var d=a(document).height()-c.dragProxy.outerHeight(),e=c.dragProxy.offset();e.top=Math.min(d,e.top+b),c.dragProxy.css(e)}};return{prepare:c.prepare,start:c.start}});