123 lines
2.9 KiB
JavaScript
123 lines
2.9 KiB
JavaScript
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var RecoverScroll=
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{
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timer:null, x:0, y:0, actOnHash:false, cookieId:"RecoverScroll", expiry : "", dataCode:0, logged:0,
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start : function( pageIdent, days )
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{
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this.installHandler=function(obj,evt,func) {
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window.attachEvent ? obj.attachEvent(evt,func) : obj.addEventListener(evt.replace(/^on/i,""),func,false);
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return func;
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}
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this.installHandler( window, 'onload', function(){ RecoverScroll.init( pageIdent, days ); } );
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},
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init : function( pageName, days )
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{
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var dt, duration;
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if( typeof window.pageXOffset != 'undefined' )
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this.dataCode = 1;
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else
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if( document.documentElement )
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this.dataCode = 3;
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else
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if( document.body && typeof document.body.scrollTop != 'undefined' )
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this.dataCode = 2;
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if( pageName )
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this.cookieId = pageName.replace( /[\s\=\;\,]/g, '_' );
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if( days && ( duration = parseInt( days ) ) != NaN )
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{
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dt = new Date();
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dt.setDate( dt.getDate() + duration );
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this.expiry = ";expires=" + dt.toUTCString();
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}
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this.installHandler( window, 'onscroll', function(){ RecoverScroll.reset() } );
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this.go();
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},
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go : function( )
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{
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var sx, sy, offsetData;
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if( ( window.location.hash == "" || this.actOnHash )
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// && location.search.length == 0
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&& ( offsetData = this.readCookie( this.cookieId )) != ""
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&& ( offsetData = offsetData.split('|') ).length == 4
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&& !isNaN( sx = Number( offsetData[ 1 ] ) ) && !isNaN( sy = Number( offsetData[3] ) ) )
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{
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if(!!window.SoftScroll && SoftScroll.scrollTo)
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{ SoftScroll.init(); SoftScroll.scrollTo(sx, sy); }
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else
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window.scrollTo(sx, sy);
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}
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this.record();
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},
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sf : function( str )
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{
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return unescape(str).replace(/(.)(.*)/, function(a,b,c){return c+b;});
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},
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reset : function()
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{
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clearTimeout( this.timer );
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this.timer = setTimeout( function(){ RecoverScroll.record(); }, 50 );
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},
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record : function()
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{
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var cStr;
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this.getScrollData();
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this.setTempCookie( this.cookieId, cStr='x|'+this.x+'|y|'+this.y );
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},
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setTempCookie : function(cName, cValue)
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{
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document.cookie = cName + "=" + cValue + this.expiry;
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},
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readCookie : function(cookieName)
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{
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var cValue="";
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if(typeof document.cookie!='undefined')
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cValue=(cValue=document.cookie.match(new RegExp("(^|;|\\s)"+cookieName+'=([^;]+);?'))) ? cValue[2] : "";
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return cValue;
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},
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hash : function()
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{
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this.actOnHash = true;
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},
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getScrollData : function()
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{
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switch( this.dataCode )
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{
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case 3 : this.x = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
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this.y = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
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break;
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case 2 : this.x = document.body.scrollLeft;
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this.y = document.body.scrollTop;
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break;
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case 1 : this.x = window.pageXOffset; this.y = window.pageYOffset; break;
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}
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},
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installHandler : function(){},
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}
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