Implementation of vi in Python
The goal is to implement vi according to POSIX, no more, no less. Well actually, we do implement more and ex because of their similarity to vi, but again, the goal is to implement exactly what is in POSIX, which means:
- no visual mode the specification does not distinguish between open, normal, and visual modes, so these must be a single mode that corresponds to Normal Mode in Vim.
- no insert mode the specification refers to input mode, and so that is the mode we implement, which corresponds to Insert Mode in Vim.
There is only one exception, currently, to the rule that all features must be specified by POSIX:
- od is allowed to have an extra non-standard command-line option
-rfor reversing the dump from hex to binary. The default is still octal, but it is possible to specify hex and decimal just as POSIX specifies.
With the above rules in mind, here are the modes that we implement in Positive vi:
- Command (Vim calls this Normal)
- Command/Line (Vim calls this Cmd-Line)
- Command/Pending (Vim calls this Cmd-Pending)
- Input (Vim calls this Insert)
- Input/Replace (Vim calls this Replace)
All commands are prefixed with p.
pod- Positive Octal Dump. Add-Ax -tx1for hex.pmore- Positive More Pagerpex- Positive Extended Editorpvi- Positive Visual Editor
Download this repo, change directory, and
python3 ./setup.py install, or
pip3 install -e git+https://github.com/andydude/positive-vi.git#egg=positive_vi
pvi MyFile.txt