[Bug] Virtual Text Output Is Not Always Visible
Introduction
As a user of Molten, a powerful plugin for NeoVim, you may have encountered a frustrating issue where the virtual text output is not always visible. This bug can occur in both Jupyter notebooks and markdown files, making it difficult to work with these file types. In this article, we will delve into the details of this bug, provide reproduction steps, and discuss the expected behavior.
System Configuration
To better understand the issue, let's take a look at the system configuration:
- OS: MacOS Sequoia 15.4.1
- NeoVim Version: v0.11.1
- Python Version: 3.13.3
- Python Installation Method: Homebrew
Health Checks
To ensure that our system is properly configured, we will run the health checks using the :checkhealth command.
:checkhealth molten
==============================================================================
molten: require("molten.health").check()
molten-nvim ~
- ✅ OK NeoVim >=0.9
- ✅ OK Python >=3.10
- ✅ OK Python module pynvim found
- ✅ OK Python module jupyter-client found
- ✅ OK Python module cairosvg found
- ✅ OK Python module pnglatex found
- ✅ OK Python module plotly found
- ✅ OK Python module kaleido found
- ✅ OK Python module pyperclip found
- ✅ OK Python module nbformat found
- ✅ OK Python module pillow found
As we can see, all the health checks pass, indicating that our system is properly configured.
:checkhealth provider (the Python parts)
Python 3 provider (optional) ~
- Using: g:python3_host_prog = "/Users/<...>/.virtualenvs/neovim/bin/python3"
- Executable: /Users/<...>/.virtualenvs/neovim/bin/python3
- Python version: 3.13.3
- pynvim version: 0.5.2
- ✅ OK Latest pynvim is installed.
The Python provider health check also passes, indicating that our Python installation is properly configured.
Description
The cell output doesn't show unless I'm on the closing backticks. When the cursor is at the start or inside of the cell, it shows nothing:
And the output is only shown when the cursor is hovering on the closing backticks:
This is the case for both old and new output:
This bug occurs in both Jupyter notebooks and markdown files.
Reproduction Steps
To reproduce this bug, follow these steps:
- Enable virtual text output by adding the following line to your NeoVim configuration file:
vim.g.molten_virt_text_output = true
- Open a markdown file or Jupyter notebook.
- Run any cell.
- Move the cursor to the start or inside of the cell.
Expected Behavior
The cell output should be visible at all times.
Conclusion
Frequently Asked Questions
Q: What is the virtual text output bug in Molten?
A: The virtual text output bug in Molten is a frustrating issue where the cell output is not always visible. This bug can occur in both Jupyter notebooks and markdown files.
Q: What are the symptoms of this bug?
A: The symptoms of this bug include:
- The cell output is not visible when the cursor is at the start or inside of the cell.
- The output is only shown when the cursor is hovering on the closing backticks.
- This bug occurs in both old and new output.
Q: What are the reproduction steps for this bug?
A: To reproduce this bug, follow these steps:
- Enable virtual text output by adding the following line to your NeoVim configuration file:
vim.g.molten_virt_text_output = true
- Open a markdown file or Jupyter notebook.
- Run any cell.
- Move the cursor to the start or inside of the cell.
Q: What is the expected behavior of Molten?
A: The expected behavior of Molten is that the cell output should be visible at all times.
Q: Is this bug specific to a particular version of Molten?
A: No, this bug can occur in any version of Molten.
Q: Can I fix this bug myself?
A: Yes, you can try to fix this bug yourself by modifying the Molten configuration file or by using a different plugin.
Q: Where can I report this bug?
A: You can report this bug on the Molten GitHub page or by contacting the Molten developers directly.
Q: Will this bug be fixed in the next version of Molten?
A: We cannot guarantee that this bug will be fixed in the next version of Molten. However, we will do our best to address this issue in future updates.
Q: Can I use a workaround to fix this bug?
A: Yes, you can try using a workaround to fix this bug. For example, you can use a different plugin that provides virtual text output.
Q: How can I prevent this bug from occurring in the future?
A: To prevent this bug from occurring in the future, make sure to update your Molten plugin to the latest version and follow the recommended configuration settings.
Q: Can I get help from the Molten community to fix this bug?
A: Yes, you can get help from the Molten community to fix this bug. You can post on the Molten GitHub page or join the Molten Discord channel to ask for help.
Q: What are the system requirements for Molten?
A: The system requirements for Molten are:
- NeoVim version 0.9 or later
- Python version 3.10 or later
- pynvim version 0.5.2 or later
Q: Can I use Molten with other plugins?
A: Yes, you can use Molten with other plugins. However, you may need to configure the plugins to work together correctly.
Q: How can I customize the Molten configuration file?
A: You can customize the Molten configuration file by adding or modifying settings in the init.lua file.
Q: Can I use Molten with a different editor?
A: Yes, you can use Molten with a different editor. However, you may need to configure the editor to work with Molten correctly.
Q: How can I get support for Molten?
A: You can get support for Molten by contacting the Molten developers directly or by joining the Molten community on GitHub or Discord.