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Update media/src/core/core.sort.js

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Speed things up by applying classes only when needed
This commit is contained in:
Tim Tucker 2012-09-04 11:05:53 -03:00
parent cb2495b440
commit 89be8f4083
1 changed files with 34 additions and 38 deletions
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72
media/src/core/core.sort.js
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@ -402,54 +402,50 @@ function _fnSortingClasses( oSettings )
{
var nTds = _fnGetTdNodes( oSettings );
/* Remove the old classes */
if ( oSettings.oFeatures.bDeferRender || nTds.length >= iColumns )
/* Determine what the sorting class for each column should be */
var iClass, iTargetCol;
var asClasses = [];
for (i = 0; i < iColumns; i++)
{
var reClass = new RegExp(sClass + "[123]");
/* Track columns where we've found one of the sorting classes */
var abFound = [], iFound = 0;
for ( i=0, iLen=nTds.length; i<iLen; i++ )
{
/* Determine which column we're looking at */
iTargetCol = i % iColumns;
/* Check if we've already found the class at least once in this column
*
* If not, check the className of this cell
*
* Stop once we've found all 3 sorting classes
*/
if (iFound < 3 && !abFound[iTargetCol] && nTds[i].className.indexOf(sClass) !== -1)
{
abFound[iTargetCol] = true;
iFound++;
}
if ( abFound[iTargetCol] )
{
nTds[i].className =
$.trim( nTds[i].className.replace( reClass, "" ) );
}
}
asClasses.push("");
}
/* Add the new classes to the table */
var iClass = 1, iTargetCol;
for ( i=0 ; i<aaSort.length ; i++ )
for (i = 0, iClass = 1; i < aaSort.length; i++)
{
iTargetCol = parseInt( aaSort[i][0], 10 );
for ( j=0, jLen=(nTds.length/iColumns) ; j<jLen ; j++ )
{
nTds[(iColumns*j)+iTargetCol].className += " "+sClass+iClass;
}
asClasses[iTargetCol] = sClass + iClass;
if ( iClass < 3 )
{
iClass++;
}
}
/* Make changes to the classes for each cell as needed */
var reClass = new RegExp(sClass + "[123]");
var sTmpClass, sCurrentClass, sNewClass;
for ( i=0, iLen=nTds.length; i<iLen; i++ )
{
/* Determine which column we're looking at */
iTargetCol = i % iColumns;
/* What is the full list of classes now */
sCurrentClass = nTds[i].className;
/* What sorting class should be applied? */
sNewClass = asClasses[iTargetCol];
/* What would the new full list be if we did a replacement? */
sTmpClass = sCurrentClass.replace(reClass, sNewClass);
if ( sTmpClass != sCurrentClass )
{
/* We changed something */
nTds[i].className = $.trim( sTmpClass );
}
else if ( sNewClass.length > 0 && sCurrentClass.indexOf(sNewClass) == -1 )
{
/* We need to add a class */
nTds[i].className = sCurrentClass + " " + sNewClass;
}
}
}
}