Update pageResize plugin. Add paging parameter to pass it to the draw function call inside pageResize plugin. Add callback which called before draw and provides cancel ability and ability to override the draw paging parameter.

Author: AlexDEVpro

features/pageResize/dataTables.pageResize.js

@@ -63,19 +63,21 @@
 'use strict';
 
 
-var PageResize = function ( dt, pageResizeManualDelta )
+var PageResize = function ( dt, pageResizeManualDelta, pageResizeDrawPagingParameter, pageResizePreDrawCallback )
 {
 	var table = dt.table();
 
 	this.s = {
-		dt:        dt,
-		host:      $(table.container()).parent(),
-		header:    $(table.header()),
-		footer:    $(table.footer()),
-		body:      $(table.body()),
-		container: $(table.container()),
-		table:     $(table.node()),
-		delta:     pageResizeManualDelta
+		dt:                     dt,
+		host:                   $(table.container()).parent(),
+		header:                 $(table.header()),
+		footer:                 $(table.footer()),
+		body:                   $(table.body()),
+		container:              $(table.container()),
+		table:                  $(table.node()),
+        delta:                  pageResizeManualDelta,
+        drawPagingParameter:    pageResizeDrawPagingParameter,
+        preDrawCallback:        pageResizePreDrawCallback
 	};
 
 	var host = this.s.host;
@@ -99,7 +101,9 @@ PageResize.prototype = {
 		var rowHeight = rows.eq( rows.length > 1 ? 1 : 0 ).height(); // Attempt to use the second row if poss, for top and bottom border
 		var availableHeight = settings.host.height();
 		var scrolling = t.header().parentNode !== t.body().parentNode;
-		var delta = settings.delta;
+        var delta = settings.delta;
+        var pagingObject = { paging: settings.drawPagingParameter };
+        var preDrawCallback = settings.preDrawCallback;
 
 		// Subtract the height of the header, footer and the elements
 		// surrounding the table
@@ -122,9 +126,10 @@ PageResize.prototype = {
 
 		if ( drawRows !== Infinity && drawRows !== -Infinity && 
 			 ! isNaN( drawRows )   && drawRows > 0 &&
-			 drawRows !== dt.page.len()
+             drawRows !== dt.page.len() &&
+             ( !preDrawCallback || preDrawCallback( drawRows, dt.page.len(), pagingObject ) !== false )
 		) {
-			dt.page.len( drawRows ).draw();
+            dt.page.len( drawRows ).draw( pagingObject.paging );
 		}
 	},
 
@@ -182,7 +187,7 @@ $(document).on( 'init.dt', function ( e, settings ) {
 		 settings.oInit.pageResize ||
 		 $.fn.dataTable.defaults.pageResize )
 	{
-		new PageResize( api, settings.oInit.pageResizeManualDelta );
+		new PageResize( api, settings.oInit.pageResizeManualDelta, settings.oInit.pageResizeDrawPagingParameter, settings.oInit.pageResizePreDrawCallback );
 	}
 } );