Wrap model on insert single char

src/ui_model/mod.rs

@@ -174,6 +174,15 @@ impl UiModel {
         ModelRect::new(top as usize, bot as usize, left, right)
     }
 
+    /// Move down all lines except first one
+    pub fn move_down(&mut self) {
+        let right = self.columns + 1;
+
+        for row in (1..self.rows + 1).rev() {
+            self.copy_row(row as i64, 1, 0, right);
+        }
+    }
+
     pub fn clear(&mut self) {
         let (rows, columns) = (self.rows, self.columns);
         self.clear_region(0, rows - 1, 0, columns - 1);

src/ui_model/model_layout.rs

@@ -65,6 +65,14 @@ impl ModelLayout {
 
         if shift {
             //TODO: insert special char
+            if self.cols_filled + 1 >= self.model.columns {
+                let rows_filled = self.rows_filled + 1;
+
+                self.check_model_size(rows_filled);
+                self.model.move_down();
+
+                self.rows_filled = rows_filled;
+            }
         } else {
             self.model.put(c.chars().next().unwrap(), false, None);
         }