Initial commit: NetMesh smart ops platform with 3D topology, inspection reports, RCA and AI ops assistant

domain/sftpVirtualList.ts

@@ -0,0 +1,22 @@
+interface SftpVirtualListScrollInput {
+  itemIndex: number;
+  rowHeight: number;
+  currentScrollTop: number;
+  viewportHeight: number;
+}
+
+export const getSftpVirtualListScrollTop = ({
+  itemIndex,
+  rowHeight,
+  currentScrollTop,
+  viewportHeight,
+}: SftpVirtualListScrollInput): number => {
+  const rowTop = itemIndex * rowHeight;
+  const rowBottom = rowTop + rowHeight;
+
+  if (rowTop < currentScrollTop) return rowTop;
+  if (rowBottom > currentScrollTop + viewportHeight) {
+    return rowBottom - viewportHeight;
+  }
+  return currentScrollTop;
+};