/*
 Copyright (c) 2009, Yahoo! Inc. All rights reserved.
 Code licensed under the BSD License:
 http://developer.yahoo.net/yui/license.txt
 version: 3.0.0
 build: 1549
 */
YUI.add('dd-ddm-drop',function(Y){Y.mix(Y.DD.DDM,{_noShim:false,_activeShims:[],_hasActiveShim:function(){if(this._noShim){return true;}
return this._activeShims.length;},_addActiveShim:function(d){this._activeShims[this._activeShims.length]=d;},_removeActiveShim:function(d){var s=[];Y.each(this._activeShims,function(v,k){if(v._yuid!==d._yuid){s[s.length]=v;}});this._activeShims=s;},syncActiveShims:function(force){Y.later(0,this,function(force){var drops=((force)?this.targets:this._lookup());Y.each(drops,function(v,k){v.sizeShim.call(v);},this);},force);},mode:0,POINT:0,INTERSECT:1,STRICT:2,useHash:true,activeDrop:null,validDrops:[],otherDrops:{},targets:[],_addValid:function(drop){this.validDrops[this.validDrops.length]=drop;return this;},_removeValid:function(drop){var drops=[];Y.each(this.validDrops,function(v,k){if(v!==drop){drops[drops.length]=v;}});this.validDrops=drops;return this;},isOverTarget:function(drop){if(this.activeDrag&&drop){var xy=this.activeDrag.mouseXY,r,dMode=this.activeDrag.get('dragMode'),aRegion;if(xy&&this.activeDrag){aRegion=this.activeDrag.region;if(dMode==this.STRICT){return this.activeDrag.get('dragNode').inRegion(drop.region,true,aRegion);}else{if(drop&&drop.shim){if((dMode==this.INTERSECT)&&this._noShim){r=((aRegion)?aRegion:this.activeDrag.get('node'));return drop.get('node').intersect(r).inRegion;}else{return drop.shim.intersect({top:xy[1],bottom:xy[1],left:xy[0],right:xy[0]},drop.region).inRegion;}}else{return false;}}}else{return false;}}else{return false;}},clearCache:function(){this.validDrops=[];this.otherDrops={};this._activeShims=[];},_activateTargets:function(){this.clearCache();Y.each(this.targets,function(v,k){v._activateShim.apply(v,[]);},this);this._handleTargetOver();},getBestMatch:function(drops,all){var biggest=null,area=0,out;Y.each(drops,function(v,k){var inter=this.activeDrag.get('dragNode').intersect(v.get('node'));v.region.area=inter.area;if(inter.inRegion){if(inter.area>area){area=inter.area;biggest=v;}}},this);if(all){out=[];Y.each(drops,function(v,k){if(v!==biggest){out[out.length]=v;}},this);return[biggest,out];}else{return biggest;}},_deactivateTargets:function(){var other=[],tmp,activeDrag=this.activeDrag,activeDrop=this.activeDrop;if(activeDrag&&activeDrop&&this.otherDrops[activeDrop]){if(!activeDrag.get('dragMode')){other=this.otherDrops;delete other[activeDrop];}else{tmp=this.getBestMatch(this.otherDrops,true);activeDrop=tmp[0];other=tmp[1];}
activeDrag.get('node').removeClass(this.CSS_PREFIX+'-drag-over');if(activeDrop){activeDrop.fire('drop:hit',{drag:activeDrag,drop:activeDrop,others:other});activeDrag.fire('drag:drophit',{drag:activeDrag,drop:activeDrop,others:other});}}else if(activeDrag){activeDrag.get('node').removeClass(this.CSS_PREFIX+'-drag-over');activeDrag.fire('drag:dropmiss',{pageX:activeDrag.lastXY[0],pageY:activeDrag.lastXY[1]});}else{}
this.activeDrop=null;Y.each(this.targets,function(v,k){v._deactivateShim.apply(v,[]);},this);},_dropMove:function(){if(this._hasActiveShim()){this._handleTargetOver();}else{Y.each(this.otherDrops,function(v,k){v._handleOut.apply(v,[]);});}},_lookup:function(){if(!this.useHash||this._noShim){return this.validDrops;}
var drops=[];Y.each(this.validDrops,function(v,k){if(v.shim&&v.shim.inViewportRegion(false,v.region)){drops[drops.length]=v;}});return drops;},_handleTargetOver:function(){var drops=this._lookup();Y.each(drops,function(v,k){v._handleTargetOver.call(v);},this);},_regTarget:function(t){this.targets[this.targets.length]=t;},_unregTarget:function(drop){var targets=[],vdrops;Y.each(this.targets,function(v,k){if(v!=drop){targets[targets.length]=v;}},this);this.targets=targets;vdrops=[];Y.each(this.validDrops,function(v,k){if(v!==drop){vdrops[vdrops.length]=v;}});this.validDrops=vdrops;},getDrop:function(node){var drop=false,n=Y.Node.get(node);if(n instanceof Y.Node){Y.each(this.targets,function(v,k){if(n.compareTo(v.get('node'))){drop=v;}});}
return drop;}},true);},'3.0.0',{requires:['dd-ddm'],skinnable:false});