Spreadsheet: Make it possible to refer to ranges in other sheets

Now the range A0:C4 in a sheet named "foo" can be represented as:

    R`sheet("foo"):A0:C4`

This makes it possible to do cross-sheet lookups and more.

Userland/Applications/Spreadsheet/JSIntegration.cpp

@@ -154,6 +154,7 @@ void SheetGlobalObject::initialize_global_object()
     define_native_function("column_arithmetic", column_arithmetic, 2, attr);
     define_native_function("column_index", column_index, 1, attr);
     define_native_function("get_column_bound", get_column_bound, 1, attr);
+    define_native_accessor("name", get_name, nullptr, attr);
 }
 
 void SheetGlobalObject::visit_edges(Visitor& visitor)
@@ -167,6 +168,17 @@ void SheetGlobalObject::visit_edges(Visitor& visitor)
     }
 }
 
+JS_DEFINE_NATIVE_FUNCTION(SheetGlobalObject::get_name)
+{
+    auto* this_object = TRY(vm.this_value(global_object).to_object(global_object));
+
+    if (!is<SheetGlobalObject>(this_object))
+        return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::NotAnObjectOfType, "SheetGlobalObject");
+
+    auto sheet_object = static_cast<SheetGlobalObject*>(this_object);
+    return JS::js_string(global_object.heap(), sheet_object->m_sheet.name());
+}
+
 JS_DEFINE_NATIVE_FUNCTION(SheetGlobalObject::get_real_cell_contents)
 {
     auto* this_object = TRY(vm.this_value(global_object).to_object(global_object));

Userland/Applications/Spreadsheet/JSIntegration.h

@@ -39,6 +39,7 @@ public:
     JS_DECLARE_NATIVE_FUNCTION(column_index);
     JS_DECLARE_NATIVE_FUNCTION(column_arithmetic);
     JS_DECLARE_NATIVE_FUNCTION(get_column_bound);
+    JS_DECLARE_NATIVE_FUNCTION(get_name);
 
 private:
     virtual void visit_edges(Visitor&) override;

Userland/Applications/Spreadsheet/Tests/basic.js

@@ -78,6 +78,28 @@ describe("Range", () => {
         expect(cellsVisited).toEqual(6);
     });
 
+    test("multiple sheets", () => {
+        const workbook = createWorkbook();
+        const sheet1 = createSheet(workbook, "Sheet 1");
+        const sheet2 = createSheet(workbook, "Sheet 2");
+        sheet1.makeCurrent();
+
+        sheet1.setCell("A", 0, "0");
+        sheet1.focusCell("A", 0);
+
+        sheet2.setCell("A", 0, "0");
+        sheet2.setCell("A", 10, "0");
+        sheet2.setCell("B", 1, "0");
+        sheet2.focusCell("A", 0);
+
+        expect(R).toBeDefined();
+        let cellsVisited = 0;
+        R`sheet("Sheet 2"):A0:A10`.forEach(name => {
+            ++cellsVisited;
+        });
+        expect(cellsVisited).toEqual(11);
+    });
+
     test("Ranges", () => {
         const workbook = createWorkbook();
         const sheet = createSheet(workbook, "Sheet 1");