Revert "fix(data-grid): fix range pasting"

This reverts commit d4f9bfd.

Author: sadmann7

src/hooks/use-data-grid.ts

@@ -404,21 +404,11 @@ function useDataGrid<TData>({
         }
       }
 
-      // Determine the full range of indices to cover — including any rows
-      // that were just added by onRowsAdd and are in the table but may not
-      // yet be reflected in propsRef.current.data (stale closure timing).
-      const maxUpdateIndex =
-        rowUpdatesMap.size > 0
-          ? Math.max(...Array.from(rowUpdatesMap.keys()))
-          : -1;
-      const dataLength = Math.max(currentData.length, maxUpdateIndex + 1);
-
-      const newData: TData[] = new Array(dataLength);
-
-      for (let i = 0; i < dataLength; i++) {
+      const newData: TData[] = new Array(currentData.length);
+
+      for (let i = 0; i < currentData.length; i++) {
         const updates = rowUpdatesMap.get(i);
-        // Fall back to the table's row data for rows not yet in currentData
-        const existingRow = currentData[i] ?? rows?.[i]?.original;
+        const existingRow = currentData[i];
 
         if (existingRow == null) continue;
 
@@ -728,51 +718,13 @@ function useDataGrid<TData>({
           if (!clipboardText) return;
         }
 
-        const rawPastedData = parseTsv(
-          clipboardText,
-          navigableColumnIds.length,
-        );
-
-        // When clipboard has exactly one cell and the user has multiple cells
-        // selected, fill the entire selection with that single value.
-        const selectionCells = currentState.selectionState.selectedCells;
-        const isSingleCellClipboard =
-          rawPastedData.length === 1 && (rawPastedData[0]?.length ?? 0) === 1;
+        const pastedData = parseTsv(clipboardText, navigableColumnIds.length);
 
-        let pastedData = rawPastedData;
-        let startRowIndex = currentState.focusedCell.rowIndex;
-        let startColIndex = navigableColumnIds.indexOf(
+        const startRowIndex = currentState.focusedCell.rowIndex;
+        const startColIndex = navigableColumnIds.indexOf(
           currentState.focusedCell.columnId,
         );
 
-        if (isSingleCellClipboard && selectionCells.size > 1) {
-          const singleValue = rawPastedData[0]?.[0] ?? "";
-          let minRow = Infinity;
-          let maxRow = -Infinity;
-          let minColIdx = Infinity;
-          let maxColIdx = -Infinity;
-
-          for (const cellKey of selectionCells) {
-            const { rowIndex, columnId } = parseCellKey(cellKey);
-            const colIdx = navigableColumnIds.indexOf(columnId);
-            if (colIdx === -1) continue;
-            minRow = Math.min(minRow, rowIndex);
-            maxRow = Math.max(maxRow, rowIndex);
-            minColIdx = Math.min(minColIdx, colIdx);
-            maxColIdx = Math.max(maxColIdx, colIdx);
-          }
-
-          if (minRow !== Infinity) {
-            startRowIndex = minRow;
-            startColIndex = minColIdx;
-            const numRows = maxRow - minRow + 1;
-            const numCols = maxColIdx - minColIdx + 1;
-            pastedData = Array.from({ length: numRows }, () =>
-              Array.from({ length: numCols }, () => singleValue),
-            );
-          }
-        }
-
         if (startColIndex === -1) return;
 
         const rowCount = rows.length ?? propsRef.current.data.length;
@@ -903,7 +855,7 @@ function useDataGrid<TData>({
               case "select": {
                 const options = cellOpts?.options ?? [];
                 if (!pastedValue) {
-                  processedValue = null;
+                  processedValue = "";
                 } else {
                   const matched = matchSelectOption(pastedValue, options);
                   if (matched) processedValue = matched;

src/lib/data-grid.ts

@@ -327,7 +327,7 @@ export function parseTsv(
     return rows;
   }
 
-  const lines = text.split("\n").map((l) => l.replace(/\r$/, ""));
+  const lines = text.split("\n");
   let maxTabCount = 0;
   for (const line of lines) {
     const n = countTabs(line);