/* * File: Scroller.nightly.min.js * Version: 1.0.1.dev * Author: Allan Jardine (www.sprymedia.co.uk) * Info: www.datatables.net * * Copyright 2008-2010 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 * * 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 */ (function(d,i,h){var g=function(a,c){if(!this instanceof g)alert("Scroller warning: Scroller must be initialised with the 'new' keyword.");else{if(typeof c=="undefined")c={};this.s=d.extend({dt:a,tableTop:0,tableBottom:0,redrawTop:0,redrawBottom:0,rowHeight:null,autoHeight:true,viewportHeight:0,viewportRows:0,stateTO:null,drawTO:null},g.oDefaults,c);this.dom={force:h.createElement("div"),scroller:null,table:null};this.s.dt.oScroller=this;this._fnConstruct()}};g.prototype={fnRowToPixels:function(a){return a* this.s.rowHeight},fnPixelsToRow:function(a){return parseInt(a/this.s.rowHeight,10)},fnScrollToRow:function(a,c){a=this.fnRowToPixels(a);typeof c=="undefined"||c?d(this.dom.scroller).animate({scrollTop:a}):d(this.dom.scroller).scrollTop(a)},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*3;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);if(typeof a=="undefined"||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.dataTables_scrollBody",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";if(this.s.rowHeight!="auto")this.s.rowHeight=false;this.fnMeasure();d(this.dom.scroller).scroll(function(){a._fnScroll.call(a)});this.s.dt.aoDrawCallback.push({fn:function(){a._fnDrawCallback.call(a)},sName:"Scroller"});this.s.dt.aoStateSave.push({fn:function(c,b){return b+',"iScroller":'+a.dom.scroller.scrollTop},sName:"Scroller_State"})}, _fnScroll:function(){var a=this,c=this.dom.scroller.scrollTop,b;this.s.trace&&console.log("Scroll: "+c+"px - boundaries: "+this.s.redrawTop+" / "+this.s.redrawBottom+". Showing rows "+this.fnPixelsToRow(c)+" to "+this.fnPixelsToRow(c+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); if(cthis.s.redrawBottom){b=parseInt(c/this.s.rowHeight,10)-this.s.viewportRows;if(b<0)b=0;else if(b+this.s.dt._iDisplayLength>this.s.dt.fnRecordsDisplay()){b=this.s.dt.fnRecordsDisplay()-this.s.dt._iDisplayLength;if(b<0)b=0}else b%2!==0&&b++;if(b!=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;if(this.s.dt.oFeatures.bServerSide){clearTimeout(this.s.drawTO);this.s.drawTO=setTimeout(function(){a.s.dt._iDisplayStart= b;a.s.dt.oApi._fnCalculateEnd(a.s.dt);a.s.dt.oApi._fnDraw(a.s.dt)},this.s.serverWait)}else{this.s.dt._iDisplayStart=b;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: "+b)}}},_fnDrawCallback:function(){var a=this,c=this.dom.scroller.scrollTop;this.dom.force.style.height=this.s.rowHeight*this.s.dt.fnRecordsDisplay()+"px";var b=this.s.rowHeight*this.s.dt._iDisplayStart;if(this.s.dt._iDisplayStart===0)b= 0;else if(this.s.dt._iDisplayStart===this.s.dt.fnRecordsDisplay()-this.s.dt._iDisplayLength)b=this.s.rowHeight*this.s.dt._iDisplayStart;this.dom.table.style.top=b+"px";this.s.tableTop=b;this.s.tableBottom=d(this.s.dt.nTable).height()+this.s.tableTop;this.s.redrawTop=c-this.s.viewportHeight/2;this.s.redrawBottom=this.s.tableBottom-1.5*this.s.viewportHeight;this.s.trace&&console.log("Table redraw. Table top: "+b+"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);if(this.s.dt.oFeatures.bStateSave&&this.s.dt.oLoadedState!==null&&typeof this.s.dt.oLoadedState.iScroller!="undefined")if(this.s.dt.sAjaxSource!==null&&this.s.dt.iDraw==2||this.s.dt.sAjaxSource===null&&this.s.dt.iDraw==1)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= h.createElement("div"),c=this.s.dt.nTable.cloneNode(false),b=h.createElement("tbody"),e=h.createElement("tr"),f=h.createElement("td");f.innerHTML=" ";e.appendChild(f);b.appendChild(e);c.appendChild(b);a.className=this.s.dt.oClasses.sScrollBody;a.appendChild(c);h.body.appendChild(a);this.s.rowHeight=d(e).height();h.body.removeChild(a)},_fnInfo:function(){if(this.s.dt.oFeatures.bInfo){var a=this.s.dt,c=this.dom.scroller.scrollTop,b=this.fnPixelsToRow(c)+1,e=a.fnRecordsTotal(),f=a.fnRecordsDisplay(); c=this.fnPixelsToRow(c+d(this.dom.scroller).height());c=f