New: search() and columns().search() API methods

- Ability to filter the table through the new API.

- This effectively replaces the fnFilter method of the old API.

- Note that one capability which has been removed from the old API is the
  ability to not show the new filter on the filtering input elements. I
  can't see any use for that feature to be honest, so it has been
  dropped. The filtering inputs always show the global filter state now.

- Additionally, note that we've been forced to call this `search` here
  rather than `filter` since there is a `filter` method for the API
  collection instance. This might be revisted before release.

media/src/DataTables.js

@@ -117,6 +117,7 @@
 	require('api._selectors.js');
 	require('api.rows.js');
 	require('api.columns.js');
+	require('api.search.js');
 	require('api.static.js');
 
 	/**

media/src/api/api.columns.js

@@ -135,12 +135,14 @@ _api.register( 'columns().visible()', function ( vis ) {
 // } );
 
 
+
 _api.register( 'columns.adjust()', function () {
-	this.iterator( 'table', function ( settings ) {
+	return this.iterator( 'table', function ( settings ) {
 		_fnAdjustColumnSizing( settings );
 	} );
 } );
 
+
 // Convert from one column index type, to another type
 _api.register( 'column.index()', function ( type, idx ) {
 	if ( this.context.length !== 0 ) {

media/src/api/api.core.js

@@ -336,7 +336,7 @@ _Api.prototype = /** @lends DataTables.Api */{
 
 		for ( i=0, ien=context.length ; i<ien ; i++ ) {
 			if ( type === 'table' ) {
-				ret = fn( context[i] );
+				ret = fn( context[i], i );
 
 				if ( ret !== undefined ) {
 					a.push( ret );
@@ -344,7 +344,7 @@ _Api.prototype = /** @lends DataTables.Api */{
 			}
 			else if ( type === 'columns' || type === 'rows' ) {
 				// this has same length as context - one entry for each table
-				ret = fn( context[i], this[i] );
+				ret = fn( context[i], this[i], i );
 
 				if ( ret !== undefined ) {
 					a.push( ret );

media/src/core/core.data.js

@@ -495,7 +495,7 @@ function _fnClearTable( oSettings )
  *  @param {int} iTarget value to find
  *  @memberof DataTable#oApi
  */
-function _fnDeleteIndex( a, iTarget )
+function _fnDeleteIndex( a, iTarget, splice )
 {
 	var iTargetIndex = -1;
 	
@@ -511,7 +511,7 @@ function _fnDeleteIndex( a, iTarget )
 		}
 	}
 	
-	if ( iTargetIndex != -1 )
+	if ( iTargetIndex != -1 && splice === undefined )
 	{
 		a.splice( iTargetIndex, 1 );
 	}

media/src/core/core.filter.js

@@ -100,7 +100,7 @@ function _fnFilterComplete ( oSettings, oInput, iForce )
 		fnSaveFilter( oInput );
 
 		/* Now do the individual column filter */
-		for ( var i=0 ; i<oSettings.aoPreSearchCols.length ; i++ )
+		for ( var i=0 ; i<aoPrevSearch.length ; i++ )
 		{
 			_fnFilterColumn( oSettings, aoPrevSearch[i].sSearch, i, aoPrevSearch[i].bRegex,
 				aoPrevSearch[i].bSmart, aoPrevSearch[i].bCaseInsensitive );

media/src/core/core.length.js

@@ -1,29 +1,10 @@
 
 function _fnLengthChange ( settings, val )
 {
-	var
-		start = settings._iDisplayStart,
-		records = settings.fnRecordsDisplay(),
-		end,
-		len = parseInt( val, 10 );
-
-	/* Redraw the table */
+	var len = parseInt( val, 10 );
 	settings._iDisplayLength = len;
 
-	end = settings.fnDisplayEnd();
-	
-	/* If we have space to show extra rows (backing up from the end point - then do so */
-	if ( end === records )
-	{
-		start = end - len;
-	}
-	
-	if ( len === -1 || start < 0 )
-	{
-		start = 0;
-	}
-
-	settings._iDisplayStart = start;
+	_fnLengthOverflow( settings );
 
 	// Fire length change event
 	$(settings.oInstance).trigger( 'length', [settings, len] );

media/src/core/core.support.js

@@ -189,3 +189,24 @@ function _fnCallbackFire( oSettings, sStore, sTrigger, aArgs )
 	return aRet;
 }
 
+
+function _fnLengthOverflow ( settings )
+{
+	var
+		start = settings._iDisplayStart,
+		end = settings.fnDisplayEnd(),
+		len = settings._iDisplayLength;
+
+	/* If we have space to show extra rows (backing up from the end point - then do so */
+	if ( end === settings.fnRecordsDisplay() )
+	{
+		start = end - len;
+	}
+
+	if ( len === -1 || start < 0 )
+	{
+		start = 0;
+	}
+
+	settings._iDisplayStart = start;
+}