fix multiselect

packages/nc-gui/composables/useMultiSelect/cellRange.ts

@@ -1,6 +1,6 @@
 export interface Cell {
-  row: number | null
-  col: number | null
+  row: number
+  col: number
 }
 
 export class CellRange {
@@ -12,14 +12,22 @@ export class CellRange {
     this._end = end ?? this._start
   }
 
-  get start() {
+  isEmpty() {
+    return this._start == null || this._end == null
+  }
+
+  isSingleCell() {
+    return !this.isEmpty() && this._start?.col === this._end?.col && this._start?.row === this._end?.row
+  }
+
+  get start(): Cell {
     return {
       row: Math.min(this._start?.row ?? NaN, this._end?.row ?? NaN),
       col: Math.min(this._start?.col ?? NaN, this._end?.col ?? NaN),
     }
   }
 
-  get end() {
+  get end(): Cell {
     return {
       row: Math.max(this._start?.row ?? NaN, this._end?.row ?? NaN),
       col: Math.max(this._start?.col ?? NaN, this._end?.col ?? NaN),
@@ -27,19 +35,11 @@ export class CellRange {
   }
 
   startRange(value: Cell) {
-    if (value == null) {
-      return
-    }
-
     this._start = value
     this._end = value
   }
 
   endRange(value: Cell) {
-    if (value == null) {
-      return
-    }
-
     this._end = value
   }
 
@@ -47,8 +47,4 @@ export class CellRange {
     this._start = null
     this._end = null
   }
-
-  isEmpty() {
-    return this._start == null || this._end == null
-  }
 }