fix: fix the issue where line numbers are not fully displayed when exceeding 100,000

Author: fuhan666

src/app/sheet.rs

@@ -92,6 +92,8 @@ impl AppState<'_> {
             self.current_search_idx = None;
         }
 
+        self.update_row_number_width();
+
         self.add_notification(format!("Switched to sheet: {}", new_sheet_name));
         Ok(())
     }

src/app/state.rs

@@ -42,6 +42,7 @@ pub struct AppState<'a> {
     pub sheet_cell_positions: HashMap<String, CellPosition>, // Store cell positions for each sheet
     pub clipboard: Option<String>, // Store copied/cut cell content
     pub g_pressed: bool,           // Track if 'g' was pressed for 'gg' command
+    pub row_number_width: usize,   // Width for displaying row numbers
     pub search_query: String,      // Current search query
     pub search_results: Vec<(usize, usize)>, // List of cells matching the search query
     pub current_search_idx: Option<usize>, // Index of current search result
@@ -101,6 +102,16 @@ impl AppState<'_> {
         // Initialize TextArea
         let text_area = TextArea::default();
 
+        // Calculate the width needed for row numbers based on the maximum row number
+        let max_rows = workbook.get_current_sheet().max_rows;
+        let row_number_width = if max_rows < 10 {
+            1
+        } else {
+            max_rows.to_string().len()
+        };
+        // Ensure a minimum width of 4 for row numbers
+        let row_number_width = row_number_width.max(4);
+
         Ok(Self {
             workbook,
             file_path,
@@ -118,6 +129,7 @@ impl AppState<'_> {
             sheet_cell_positions,
             clipboard: None,
             g_pressed: false,
+            row_number_width,
             search_query: String::new(),
             search_results: Vec::new(),
             current_search_idx: None,
@@ -142,6 +154,14 @@ impl AppState<'_> {
         }
     }
 
+    /// Updates the row number width based on the maximum row number in the current sheet
+    pub fn update_row_number_width(&mut self) {
+        let max_rows = self.workbook.get_current_sheet().max_rows;
+        let width = max_rows.to_string().len();
+        // Ensure a minimum width of 4 for row numbers
+        self.row_number_width = width.max(4);
+    }
+
     pub fn adjust_info_panel_height(&mut self, delta: isize) {
         let new_height = (self.info_panel_height as isize + delta).clamp(6, 16) as usize;
         if new_height != self.info_panel_height {

src/ui/render.rs

@@ -72,8 +72,11 @@ fn update_visible_area(app_state: &mut AppState, area: Rect) {
     // Ensure the selected column is visible
     app_state.ensure_column_visible(app_state.selected_cell.1);
 
+    // Update row number width based on the maximum row number
+    app_state.update_row_number_width();
+
     // Calculate available width for columns (subtract row numbers and borders)
-    let available_width = (area.width as usize).saturating_sub(7); // 5 for row numbers + 2 for borders
+    let available_width = (area.width as usize).saturating_sub(app_state.row_number_width + 2); // row_number_width + 2 for borders
 
     // Calculate how many columns can fit in the available width
     let mut visible_cols = 0;
@@ -143,7 +146,7 @@ fn draw_spreadsheet(f: &mut Frame, app_state: &AppState, area: Rect) {
     let end_col = start_col + app_state.visible_cols - 1;
 
     let mut constraints = Vec::with_capacity(app_state.visible_cols + 1);
-    constraints.push(Constraint::Length(5)); // Row header width
+    constraints.push(Constraint::Length(app_state.row_number_width as u16)); // Dynamic row header width
 
     for col in start_col..=end_col {
         constraints.push(Constraint::Length(app_state.get_column_width(col) as u16));