added dimensions

Signed-off-by: Andrew Grosser <dioptre@gmail.com>

bindings/python/src/lib.rs

@@ -60,6 +60,17 @@ impl PyUserModel {
             .map_err(|e| WorkbookError::new_err(e.to_string()))
     }
 
+    /// Gets the dimensions of a worksheet, returning the bounds of all non-empty cells.
+    /// Returns a tuple of (min_row, max_row, min_column, max_column).
+    /// For an empty sheet, returns (1, 1, 1, 1).
+    pub fn get_sheet_dimensions(&self, sheet: u32) -> PyResult<(i32, i32, i32, i32)> {
+        let model = self.model.get_model();
+        let worksheet = model.workbook.worksheet(sheet)
+            .map_err(|e| WorkbookError::new_err(e.to_string()))?;
+        let dimension = worksheet.dimension();
+        Ok((dimension.min_row, dimension.max_row, dimension.min_column, dimension.max_column))
+    }
+
     pub fn to_bytes(&self) -> PyResult<Vec<u8>> {
         let bytes = self.model.to_bytes();
         Ok(bytes)
@@ -283,6 +294,16 @@ impl PyModel {
             .map_err(|e| WorkbookError::new_err(e.to_string()))
     }
 
+    /// Gets the dimensions of a worksheet, returning the bounds of all non-empty cells.
+    /// Returns a tuple of (min_row, max_row, min_column, max_column).
+    /// For an empty sheet, returns (1, 1, 1, 1).
+    pub fn get_sheet_dimensions(&self, sheet: u32) -> PyResult<(i32, i32, i32, i32)> {
+        let worksheet = self.model.workbook.worksheet(sheet)
+            .map_err(|e| WorkbookError::new_err(e.to_string()))?;
+        let dimension = worksheet.dimension();
+        Ok((dimension.min_row, dimension.max_row, dimension.min_column, dimension.max_column))
+    }
+
     #[allow(clippy::panic)]
     pub fn test_panic(&self) -> PyResult<()> {
         panic!("This function panics for testing panic handling");