feat: table virtualization (#1408)

* feat: poc table virtualization

* feat: table virtualization

* feat: add overscan of 15

* fix: increase overscan to 50

* fix: dead code

* fix: debug mode

* feat: styled space

front/src/modules/ui/table/components/EntityTableBody.tsx

@@ -1,6 +1,9 @@
+import styled from '@emotion/styled';
+import { useVirtual } from '@tanstack/react-virtual';
 import { useRecoilValue } from 'recoil';
 
 import { isNavbarSwitchingSizeState } from '@/ui/layout/states/isNavbarSwitchingSizeState';
+import { useScrollWrapperScopedRef } from '@/ui/utilities/scroll/hooks/useScrollWrapperScopedRef';
 
 import { RowIdContext } from '../contexts/RowIdContext';
 import { RowIndexContext } from '../contexts/RowIndexContext';
@@ -9,28 +12,70 @@ import { tableRowIdsState } from '../states/tableRowIdsState';
 
 import { EntityTableRow } from './EntityTableRow';
 
+type SpaceProps = {
+  top?: number;
+  bottom?: number;
+};
+
+const StyledSpace = styled.td<SpaceProps>`
+  ${({ top }) => top && `padding-top: ${top}px;`}
+  ${({ bottom }) => bottom && `padding-bottom: ${bottom}px;`}
+`;
+
 export function EntityTableBody() {
+  const scrollWrapperRef = useScrollWrapperScopedRef();
+
   const rowIds = useRecoilValue(tableRowIdsState);
 
   const isNavbarSwitchingSize = useRecoilValue(isNavbarSwitchingSizeState);
-
   const isFetchingEntityTableData = useRecoilValue(
     isFetchingEntityTableDataState,
   );
 
+  const rowVirtualizer = useVirtual({
+    size: rowIds.length,
+    parentRef: scrollWrapperRef,
+    overscan: 50,
+  });
+
+  const items = rowVirtualizer.virtualItems;
+  const paddingTop = items.length > 0 ? items[0].start : 0;
+  const paddingBottom =
+    items.length > 0
+      ? rowVirtualizer.totalSize - items[items.length - 1].end
+      : 0;
+
   if (isFetchingEntityTableData || isNavbarSwitchingSize) {
     return null;
   }
 
   return (
-    <tbody>
-      {rowIds.map((rowId, index) => (
-        <RowIdContext.Provider value={rowId} key={rowId}>
-          <RowIndexContext.Provider value={index}>
-            <EntityTableRow rowId={rowId} />
-          </RowIndexContext.Provider>
-        </RowIdContext.Provider>
-      ))}
-    </tbody>
+    <>
+      {paddingTop > 0 && (
+        <tr>
+          <StyledSpace top={paddingTop} />
+        </tr>
+      )}
+      {items.map((virtualItem) => {
+        const rowId = rowIds[virtualItem.index];
+
+        return (
+          <RowIdContext.Provider value={rowId} key={rowId}>
+            <RowIndexContext.Provider value={virtualItem.index}>
+              <EntityTableRow
+                key={virtualItem.index}
+                ref={virtualItem.measureRef}
+                rowId={rowId}
+              />
+            </RowIndexContext.Provider>
+          </RowIdContext.Provider>
+        );
+      })}
+      {paddingBottom > 0 && (
+        <tr>
+          <StyledSpace bottom={paddingBottom} />
+        </tr>
+      )}
+    </>
   );
 }

front/src/modules/ui/table/components/EntityTableRow.tsx

@@ -1,3 +1,4 @@
+import { forwardRef } from 'react';
 import styled from '@emotion/styled';
 
 import { useRecoilScopedValue } from '@/ui/utilities/recoil-scope/hooks/useRecoilScopedValue';
@@ -15,7 +16,14 @@ const StyledRow = styled.tr<{ selected: boolean }>`
     props.selected ? props.theme.accent.quaternary : 'none'};
 `;
 
-export function EntityTableRow({ rowId }: { rowId: string }) {
+type EntityTableRowProps = {
+  rowId: string;
+};
+
+export const EntityTableRow = forwardRef<
+  HTMLTableRowElement,
+  EntityTableRowProps
+>(function EntityTableRow({ rowId }, ref) {
   const columns = useRecoilScopedValue(
     visibleTableColumnsScopedSelector,
     TableRecoilScopeContext,
@@ -24,6 +32,7 @@ export function EntityTableRow({ rowId }: { rowId: string }) {
 
   return (
     <StyledRow
+      ref={ref}
       data-testid={`row-id-${rowId}`}
       selected={currentRowSelected}
       data-selectable-id={rowId}
@@ -41,4 +50,4 @@ export function EntityTableRow({ rowId }: { rowId: string }) {
       <td></td>
     </StyledRow>
   );
-}
+});