prompt-toolkit / prompt-toolkit/python-prompt-toolkit
Cursor misaligned in multiline mode when terminal width less than prompt len
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- Python
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Description
The cursor in multiline mode starts doing weird things if the prompt text is too large for the terminal size. For example, for a small terminal, just cd'ing into a directory will place the cursor at the end of the second line as seen by <C> below.
scopatz@localhost ~ $ xonsh --shell-type=prompt_toolkit
scopatz@localhost ~ $ cd xonsh/xonsh/ptk/__pycache__
/
scopatz@localhost ~/xonsh/xonsh/ptk/__pycache__ xonf
ig $ <C>
Then if you start typing, it will overwrite the first line:
scopatz@localhost ~ $ xonsh --shell-type=prompt_toolkit
scopatz@localhost ~ $ cd xonsh/xonsh/ptk/__pycache__
/
scopatz@localhost ~/xonsh/xonsh/ptk/__pycache__ echo
xonfig $ <C>
Resizing the terminal so that the prompt fits on one line, fixes the prompt dynamically:
scopatz@localhost ~/xonsh/xonsh/ptk/__pycache__ xonfig $ echo
This is on prompt-toolkit v0.57
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Research direction
Reproduce the issue with prompt-toolkit v0.57 using a terminal narrower than the prompt and multiline mode. Trace the prompt rendering and cursor placement behavior; done means typing after a wrapped prompt no longer overwrites the first line and resizing still corrects the display.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- cli
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100