/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 3.0.0pr2
*/
YUI.add("anim-base",function(B){var C="running",N="startTime",L="elapsedTime",J="start",I="tween",M="end",D="node",K="paused",P="reverse",H="iterationCount",A=Number;var F={},O={},E;B.Anim=function(){B.Anim.superclass.constructor.apply(this,arguments);O[B.stamp(this)]=this;};B.Anim.NAME="anim";B.Anim.RE_DEFAULT_UNIT=/^width|height|top|right|bottom|left|margin.*|padding.*|border.*$/i;B.Anim.DEFAULT_UNIT="px";B.Anim.DEFAULT_EASING=function(R,Q,T,S){return T*R/S+Q;};B.Anim.behaviors={left:{get:function(R,Q){return R._getOffset(Q);}}};B.Anim.behaviors.top=B.Anim.behaviors.left;B.Anim.DEFAULT_SETTER=function(U,R,X,W,Q,V,S,T){T=T||"";U._node.setStyle(R,S(Q,A(X),A(W)-A(X),V)+T);};B.Anim.DEFAULT_GETTER=function(Q,R){return Q._node.getComputedStyle(R);};B.Anim.ATTRS={node:{set:function(Q){Q=B.Node.get(Q);this._node=Q;if(!Q){B.fail("Y.Anim: invalid node: "+Q);}return Q;}},duration:{value:1},easing:{value:B.Anim.DEFAULT_EASING,set:function(Q){if(typeof Q==="string"&&B.Easing){return B.Easing[Q];}}},from:{},to:{},startTime:{value:0,readOnly:true},elapsedTime:{value:0,readOnly:true},running:{get:function(){return !!F[B.stamp(this)];},value:false,readOnly:true},iterations:{value:1},iterationCount:{value:0,readOnly:true},direction:{value:"normal"},paused:{readOnly:true,value:false},reverse:{value:false}};B.Anim.run=function(){for(var Q in O){if(O[Q].run){O[Q].run();}}};B.Anim.pause=function(){for(var Q in F){if(F[Q].pause){F[Q].pause();}}B.Anim._stopTimer();};B.Anim.stop=function(){for(var Q in F){if(F[Q].stop){F[Q].stop();}}B.Anim._stopTimer();};B.Anim._startTimer=function(){if(!E){E=setInterval(B.Anim._runFrame,1);}};B.Anim._stopTimer=function(){clearInterval(E);E=0;};B.Anim._runFrame=function(){var Q=true;for(var R in F){if(F[R]._runFrame){Q=false;F[R]._runFrame();}}if(Q){B.Anim._stopTimer();}};B.Anim.RE_UNITS=/^(-?\d*\.?\d*){1}(em|ex|px|in|cm|mm|pt|pc|%)*$/;var G={run:function(){if(!this.get(C)){this._start();}else{if(this.get(K)){this._resume();}}return this;},pause:function(){if(this.get(C)){this._pause();}return this;},stop:function(Q){if(this.get(C)||this.get(K)){this._end(Q);}return this;},_added:false,_start:function(){this._set(N,new Date()-this.get(L));this._actualFrames=0;if(!this.get(K)){this._initAttr();}F[B.stamp(this)]=this;B.Anim._startTimer();this.fire(J);},_pause:function(){this._set(N,null);this._set(K,true);delete F[B.stamp(this)];this.fire("pause");},_resume:function(){this._set(K,false);F[B.stamp(this)]=this;this.fire("resume");},_end:function(Q){this._set(N,null);this._set(L,0);this._set(K,false);delete F[B.stamp(this)];this.fire(M,{elapsed:this.get(L)});},_runFrame:function(){var X=this._runtimeAttr,S=B.Anim.behaviors,Y=X.easing,Z=X.duration,a=new Date()-this.get(N),W=this.get(P),U=(a>=Z),Q=Z,R,T;if(W){a=Z-a;U=(a<=0);Q=0;}for(var V in X){if(X[V].to){R=X[V];T=(V in S&&"set" in S[V])?S[V].set:B.Anim.DEFAULT_SETTER;if(!U){T(this,V,R.from,R.to,a,Z,Y,R.unit);}else{T(this,V,R.from,R.to,Q,Z,Y,R.unit);}}}this._actualFrames+=1;this._set(L,a);this.fire(I);if(U){this._lastFrame();}},_lastFrame:function(){var Q=this.get("iterations"),R=this.get(H);R+=1;if(Q==="infinite"||R<Q){if(this.get("direction")==="alternate"){this.set(P,!this.get(P));}this.fire("iteration");}else{R=0;this._end();}this._set(N,new Date());this._set(H,R);},_initAttr:function(){var X=this.get("from")||{},Y=this.get("to")||{},Q=this.get("duration")*1000,T=this.get(D),W=this.get("easing")||{},V={},R=B.Anim.behaviors,Z,S,U;B.each(Y,function(f,c){if(typeof f==="function"){f=f.call(this,T);}S=X[c];if(S===undefined){S=(c in R&&"get" in R[c])?R[c].get(this,c):B.Anim.DEFAULT_GETTER(this,c);}else{if(typeof S==="function"){S=S.call(this,T);}}var b=B.Anim.RE_UNITS.exec(S);var d=B.Anim.RE_UNITS.exec(f);S=b?b[1]:S;var a=d?d[1]:f,e=d?d[2]:b?b[2]:"";if(!e&&B.Anim.RE_DEFAULT_UNIT.test(c)){e=B.Anim.DEFAULT_UNIT;}if(!S||!a){B.fail('invalid "from" or "to" for "'+c+'"',"Anim");return ;}V[c]={from:S,to:a,unit:e};V.duration=Q;V.easing=W;},this);this._runtimeAttr=V;},_getOffset:function(R){var T=this._node,U=T.getComputedStyle(R),S=(R==="left")?"getX":"getY",V=(R==="left")?"setX":"setY";if(U==="auto"){var Q=T.getStyle("position");if(Q==="absolute"||Q==="fixed"){U=T[S]();T[V](U);}else{U=0;}}return U;}};B.extend(B.Anim,B.Base,G);},"3.0.0pr2",{requires:["base","node"]});