1 files changed, 10 insertions, 40 deletions
diff --git a/web/src/types.ts b/web/src/types.ts
index b41bb9a..dc26c89 100644
--- a/web/src/types.ts
+++ b/web/src/types.ts
@@ -1,9 +1,10 @@
+import { Immutable } from "immer";
 import Ratio from "./math/Ratio";
 
-export interface Cell {
+export type Cell = Immutable<{
   value?: string;
   widthRatio: Ratio;
-}
+}>;
 
 export interface Row {
   cells: Cell[];
@@ -44,42 +45,11 @@ export function cellRefEquals(a: CellRef, b: CellRef): boolean {
   );
 }
 
-export function mapRowsInRange(
-  doc: Doc,
-  gridId: string,
-  startRef: CellRef,
-  endRef: CellRef,
-  mapFn: (row: Row, ref: RowRef) => Row,
-): Doc {
-  const firstPartIndex = Math.min(startRef.partIndex, endRef.partIndex);
-  const lastPartIndex = Math.max(startRef.partIndex, endRef.partIndex);
-  const firstRowIndex = Math.min(startRef.rowIndex, endRef.rowIndex);
-  const lastRowIndex = Math.max(startRef.rowIndex, endRef.rowIndex);
-
-  return {
-    ...doc,
-    grids: doc.grids.map((grid) => {
-      if (grid.id !== gridId) return grid;
-
-      return {
-        ...grid,
-        parts: grid.parts.map((part, partIndex) => {
-          if (partIndex < firstPartIndex || partIndex > lastPartIndex) {
-            return part;
-          }
-
-          return {
-            ...part,
-            rows: part.rows.map((row, rowIndex) => {
-              if (rowIndex < firstRowIndex || rowIndex > lastRowIndex) {
-                return row;
-              }
-
-              return mapFn(row, { partIndex, rowIndex });
-            }),
-          };
-        }),
-      };
-    }),
-  };
+export function renderedRowIndexToRef(
+  grid: Grid,
+  renderedRowIndex: number,
+): RowRef {
+  const partIndex = renderedRowIndex % grid.parts.length;
+  const rowIndex = Math.floor(renderedRowIndex / grid.parts.length);
+  return { partIndex, rowIndex };
 }