| /* |
| Copyright (c) 2004-2009, The Dojo Foundation All Rights Reserved. |
| Available via Academic Free License >= 2.1 OR the modified BSD license. |
| see: http://dojotoolkit.org/license for details |
| */ |
| |
| |
| if(!dojo._hasResource["dojox.cometd.timesync"]){ |
| dojo._hasResource["dojox.cometd.timesync"]=true; |
| dojo.provide("dojox.cometd.timesync"); |
| dojo.require("dojox.cometd._base"); |
| dojox.cometd.timesync=new function(){ |
| this._window=10; |
| this._minWindow=4; |
| this._offsets=[]; |
| this.offset=0; |
| this.samples=0; |
| this.getServerTime=function(){ |
| return new Date().getTime()+this.offset; |
| }; |
| this.getServerDate=function(){ |
| return new Date(this.getServerTime()); |
| }; |
| this.setTimeout=function(_1,_2){ |
| var ts=(_2 instanceof Date)?_2.getTime():(0+_2); |
| var tc=ts-this.offset; |
| var _5=tc-new Date().getTime(); |
| if(_5<=0){ |
| _5=1; |
| } |
| return setTimeout(_1,_5); |
| }; |
| this._in=function(_6){ |
| var _7=_6.channel; |
| if(_7&&_7.indexOf("/meta/")==0){ |
| if(_6.ext&&_6.ext.timesync){ |
| var _8=_6.ext.timesync; |
| var _9=new Date().getTime(); |
| this._offsets.push(_8.ts-_8.tc-(_9-_8.tc-_8.p)/2); |
| if(this._offsets.length>this._window){ |
| this._offsets.shift(); |
| } |
| this.samples++; |
| var _a=0; |
| for(var i in this._offsets){ |
| _a+=this._offsets[i]; |
| } |
| this.offset=parseInt((_a/this._offsets.length).toFixed()); |
| if(this.samples<this._minWindow){ |
| setTimeout(dojox._scopeName+".cometd.publish('/meta/ping',null)",100); |
| } |
| } |
| } |
| return _6; |
| }; |
| this._out=function(_c){ |
| var _d=_c.channel; |
| if(_d&&_d.indexOf("/meta/")==0){ |
| var _e=new Date().getTime(); |
| if(!_c.ext){ |
| _c.ext={}; |
| } |
| _c.ext.timesync={tc:_e}; |
| } |
| return _c; |
| }; |
| }; |
| dojox.cometd._extendInList.push(dojo.hitch(dojox.cometd.timesync,"_in")); |
| dojox.cometd._extendOutList.push(dojo.hitch(dojox.cometd.timesync,"_out")); |
| } |
