CodeMirror 6 quirk list

[laurent22]

We would like the CodeMirror 6 editor to work like a regular text editor, with as few surprising or "smart" behaviours as possible. A good reference would be VSCode with default settings.

Indenting a list item moves the cursor to the end of the line

Fixed in: #10441

• Create this list:

- one
- two

Ident the second item by moving the cursor before - two and press tab.

- one
    - two

Bug: The cursor moves to the end of the item like so - two|

Expected: The cursor should stay where it was, which would be before the dash: |-two

Editor wrongly guesses the number of newlines

• Create a list with these items:

- one

- two

• Move the cursor at the end of the first line: - one|
• Press Enter
• Bug: The editor inserts two newlines instead of one:

- one

-

- two

• Expected: Pressing Enter once should enter one newline, never two or three.

[personalizedrefrigerator]

Based on this commit ("preserve list tightness"), this seems to be an intentional upstream change. This doesn't happen in Joplin 2.14.20, so is a regression.

Here are a few options:

• Downgrade @codemirror/lang-markdown to version 6.2.3.
• Patch @codemirror/lang-markdown
• Create a forum post upstream, asking them to revert the change, or make this an option.
• Implement our own list continuation logic.

Edit: The behavior before v6.2.3 might also have some issues. See this forum post for details. The forum post author resolved the issue by writing their own list continuation logic.

[personalizedrefrigerator]

Bug: The cursor moves to the end of the item like so - two|

Expected: The cursor should stay where it was, which would be before the dash: |-two

This should be resolved by #10441.