Cursor can leave visible area when line numbers enabled

[achristmascarl]

Repro

1. create textarea with line numbers enabled (or run the editor example)
2. type in the textarea until it reaches the right-most border of the textarea
3. keep typing and observe that chars are inserted but cursor is no longer visible
4. move cursor to the left 3-5 times and observe that the cursor is visible again
5. create textarea without line numbers (or run vim example)and observe that 2-5 do not happen

Expected Behavior

The cursor always stops before leaving the visible area or causes the visible area to scroll to keep the cursor visible.

Actual Behavior

The number of cells the cursor can move beyond the visible area corresponds to how much width is taken up by the line numbers (e.g. for single digit line numbers, the width of the line numbers section is 3, so the cursor can move 3 past the visible area; with double digit line numbers, the width is 4, so the cursor can move 4 beyond), so I'm guessing the calculations for the boundaries/scrolling just aren't taking the line numbers section's width into account.

Env

• kitty on macOS
• rust 1.79.0
• tui-textarea 0.5.2
• ratatui 0.27.0

[rhysd]

Thanks for reporting this. I confirmed this is a bug on calculating the cursor position.

[rhysd]

The fix was included in v0.5.3 release.