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/*
* File: dataTables.scroller.min.js
* Version: 1.1.0
* Author: Allan Jardine (www.sprymedia.co.uk)
*
* Copyright 2011 Allan Jardine, all rights reserved.
*
* This source file is free software, under either the GPL v2 license or a
* BSD (3 point) style license, as supplied with this software.
*
* This source file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
*/
/*
GPL v2 or BSD 3 point style
@contact www.sprymedia.co.uk/contact
@copyright Copyright 2011-2012 Allan Jardine, all rights reserved.
This source file is free software, under either the GPL v2 license or a
BSD style license, available at:
http://datatables.net/license_gpl2
http://datatables.net/license_bsd
*/
(function(d,h,g){var e=function(a,b){!this instanceof e?alert("Scroller warning: Scroller must be initialised with the 'new' keyword."):("undefined"==typeof b&&(b={}),this.s={dt:a,tableTop:0,tableBottom:0,redrawTop:0,redrawBottom:0,rowHeight:null,autoHeight:!0,viewportHeight:0,viewportRows:0,stateTO:null,drawTO:null},this.s=d.extend(this.s,e.oDefaults,b),this.dom={force:g.createElement("div"),scroller:null,table:null},this.s.dt.oScroller=this,this._fnConstruct())};e.prototype={fnRowToPixels:function(a){return a*
this.s.rowHeight},fnPixelsToRow:function(a){return parseInt(a/this.s.rowHeight,10)},fnScrollToRow:function(a,b){var c=this.fnRowToPixels(a);"undefined"==typeof b||b?d(this.dom.scroller).animate({scrollTop:c}):d(this.dom.scroller).scrollTop(c)},fnMeasure:function(a){this.s.autoHeight&&this._fnCalcRowHeight();this.s.viewportHeight=d(this.dom.scroller).height();this.s.viewportRows=parseInt(this.s.viewportHeight/this.s.rowHeight,10)+1;this.s.dt._iDisplayLength=this.s.viewportRows*this.s.displayBuffer;
this.s.trace&&console.log("Row height: "+this.s.rowHeight+" Viewport height: "+this.s.viewportHeight+" Viewport rows: "+this.s.viewportRows+" Display rows: "+this.s.dt._iDisplayLength);("undefined"==typeof a||a)&&this.s.dt.oInstance.fnDraw()},_fnConstruct:function(){var a=this;this.dom.force.style.position="absolute";this.dom.force.style.top="0px";this.dom.force.style.left="0px";this.dom.force.style.width="1px";this.dom.scroller=d("div."+this.s.dt.oClasses.sScrollBody,this.s.dt.nTableWrapper)[0];
this.dom.scroller.appendChild(this.dom.force);this.dom.scroller.style.position="relative";this.dom.table=d(">table",this.dom.scroller)[0];this.dom.table.style.position="absolute";this.dom.table.style.top="0px";this.dom.table.style.left="0px";d(this.s.dt.nTableWrapper).addClass("DTS");this.s.loadingIndicator&&d(this.dom.scroller.parentNode).css("position","relative").append('
'+this.s.dt.oLanguage.sLoadingRecords+"
");this.s.rowHeight&&"auto"!=this.s.rowHeight&&(this.s.autoHeight=
!1);this.fnMeasure(!1);d(this.dom.scroller).scroll(function(){a._fnScroll.call(a)});d(this.dom.scroller).bind("touchstart",function(){a._fnScroll.call(a)});this.s.dt.aoDrawCallback.push({fn:function(){a.s.dt.bInitialised&&a._fnDrawCallback.call(a)},sName:"Scroller"});this.s.dt.oApi._fnCallbackReg(this.s.dt,"aoStateSaveParams",function(b,c){c.iScroller=a.dom.scroller.scrollTop},"Scroller_State")},_fnScroll:function(){var a=this,b=this.dom.scroller.scrollTop,c;if(!this.s.dt.bFiltered&&!this.s.dt.bSorted&&
(this.s.trace&&console.log("Scroll: "+b+"px - boundaries: "+this.s.redrawTop+" / "+this.s.redrawBottom+". Showing rows "+this.fnPixelsToRow(b)+" to "+this.fnPixelsToRow(b+d(this.dom.scroller).height())+" in the viewport, with rows "+this.s.dt._iDisplayStart+" to "+this.s.dt._iDisplayEnd+" rendered by the DataTable"),this._fnInfo(),clearTimeout(this.s.stateTO),this.s.stateTO=setTimeout(function(){a.s.dt.oApi._fnSaveState(a.s.dt)},250),bthis.s.redrawBottom)){var f=(this.s.displayBuffer-
1)/2*this.s.viewportRows;c=parseInt(b/this.s.rowHeight,10)-f;0>c?c=0:c+this.s.dt._iDisplayLength>this.s.dt.fnRecordsDisplay()?(c=this.s.dt.fnRecordsDisplay()-this.s.dt._iDisplayLength,0>c&&(c=0)):0!==c%2&&c++;c!=this.s.dt._iDisplayStart&&(this.s.tableTop=d(this.s.dt.nTable).offset().top,this.s.tableBottom=d(this.s.dt.nTable).height()+this.s.tableTop,this.s.dt.oFeatures.bServerSide?(clearTimeout(this.s.drawTO),this.s.drawTO=setTimeout(function(){a.s.dt._iDisplayStart=c;a.s.dt.oApi._fnCalculateEnd(a.s.dt);
a.s.dt.oApi._fnDraw(a.s.dt)},this.s.serverWait)):(this.s.dt._iDisplayStart=c,this.s.dt.oApi._fnCalculateEnd(this.s.dt),this.s.dt.oApi._fnDraw(this.s.dt)),this.s.trace&&console.log("Scroll forcing redraw - top DT render row: "+c))}},_fnDrawCallback:function(){var a=this,b=this.dom.scroller.scrollTop,c=b+this.s.viewportHeight;this.dom.force.style.height=this.s.rowHeight*this.s.dt.fnRecordsDisplay()+"px";var f=this.s.rowHeight*this.s.dt._iDisplayStart;0===this.s.dt._iDisplayStart?f=0:this.s.dt._iDisplayStart===
this.s.dt.fnRecordsDisplay()-this.s.dt._iDisplayLength&&(f=this.s.rowHeight*this.s.dt._iDisplayStart);this.dom.table.style.top=f+"px";this.s.tableTop=f;this.s.tableBottom=d(this.s.dt.nTable).height()+this.s.tableTop;this.s.redrawTop=b-(b-this.s.tableTop)*this.s.boundaryScale;this.s.redrawBottom=b+(this.s.tableBottom-c)*this.s.boundaryScale;this.s.trace&&console.log("Table redraw. Table top: "+f+"px Table bottom: "+this.s.tableBottom+" Scroll boundary top: "+this.s.redrawTop+" Scroll boundary bottom: "+
this.s.redrawBottom+" Rows drawn: "+this.s.dt._iDisplayLength);setTimeout(function(){a._fnInfo.call(a)},0);this.s.dt.oFeatures.bStateSave&&null!==this.s.dt.oLoadedState&&"undefined"!=typeof this.s.dt.oLoadedState.iScroller&&(null!==this.s.dt.sAjaxSource&&2==this.s.dt.iDraw||null===this.s.dt.sAjaxSource&&1==this.s.dt.iDraw)&&setTimeout(function(){d(a.dom.scroller).scrollTop(a.s.dt.oLoadedState.iScroller);a.s.redrawTop=a.s.dt.oLoadedState.iScroller-a.s.viewportHeight/2},0)},_fnCalcRowHeight:function(){var a=
this.s.dt.nTable.cloneNode(!1),b=d('
