dynamic-virtual-scroller - npm Package Compare versions

Comparing version 1.0.2 to 1.0.3

package.json

 {
     "name": "dynamic-virtual-scroller",
-    "version": "1.0.2",
+    "version": "1.0.3",
     "description": "A virtual scroller for the web that can handle dynamic row and column sizes.",
@@ -5,0 +5,0 @@ "main": "virtual-scroller.js",

virtual-scroller.js

@@ -1419,4 +1419,69 @@ window.VirtualScroller = (function ($, _) {
 
+    /*
+        Dom Cache Adapter
+    */
 
+    VirtualScroller.DomCacheAdapter = function (scrollerConfig) {
+
+        /*
+            TODO: React to all dynamic changes like rowRemoved, rowAdded, rerender, ...
+        */
+
+        var rowCache = {};
+        var columnCache = {};
+
+        var oldOnBeforeRowRemoved = scrollerConfig.onBeforeRowRemoved;
+        scrollerConfig.onBeforeRowRemoved = function (params) {
+            if (oldOnBeforeRowRemoved) {
+                oldOnBeforeRowRemoved(params);
+            }
+            rowCache[params.rowIndex] = params.row;
+            params.row.detach();
+            params.row.find('[virtual-scroller-index]').each(function (index, column) {
+                column = $(column);
+                var columnIndex = parseInt(column.attr('virtual-scroller-index'));
+                columnCache[params.rowIndex] = columnCache[params.rowIndex] || {};
+                columnCache[params.rowIndex][columnIndex] = column;
+            });
+            return false;
+        };
+
+        var oldRenderRow = scrollerConfig.renderRow;
+        scrollerConfig.renderRow = function (params) {
+            if (rowCache[params.rowIndex]) {
+                console.log('got it from cache');
+                return rowCache[params.rowIndex];
+            }
+            return oldRenderRow(params);
+        };
+
+        if (scrollerConfig.renderColumn) {
+
+            var oldOnBeforeColumnRemoved = scrollerConfig.onBeforeColumnRemoved;
+            scrollerConfig.onBeforeColumnRemoved = function (params) {
+                if (oldOnBeforeRowRemoved) {
+                    oldOnBeforeRowRemoved(params);
+                }
+                columnCache[params.rowIndex] = columnCache[params.rowIndex] || {};
+                columnCache[params.rowIndex][params.columnIndex] = params.column;
+                params.column.detach();
+                return false;
+            };
+
+            var oldRenderColumn = scrollerConfig.renderColumn;
+            scrollerConfig.renderColumn = function (params) {
+                if (columnCache[params.rowIndex][params.columnIndex]) {
+                    console.log('got it from cache');
+                    return columnCache[params.rowIndex][params.columnIndex];
+                }
+                return oldRenderColumn(params);
+            };
+        }
+
+
+        return scrollerConfig;
+    };
+
+
     return VirtualScroller;
 }(jQuery, _));

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Improved metrics

Total package byte prevSize

244344

increased by0.99%

Lines of code

1866

increased by2.98%

No dependency changes