1795791 - Inserting a bullet or numbered list breaks undo history

Status: UNCONFIRMED

(MailNews Core :: Composition, defect)

Description

[Seán Byrne]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

Example 1:

1. Type some text, e.g. "Testing 123"
2. Change the text, e.g. to "Testing 321"
3. On a new line, insert a bullet or numbered list.
4. Press CTRL + Z several times to try undoing back to the text in step 1.

Example 2:

1. Type 4 unique lines of text, e.g. "Line 1", "Line 2", "Line 3" and "Line 4"
2. Select 3 lines, e.g. lines 2 to 4.
3. Change the selected text to a bullet or numbered list using the toolbar.
4. Press CTRL + Z several times to try undoing the above.
5. Go into the Edit menu. Redo is greyed out.

Actual results:

Example 1:
Repeat Undo commands clears the list, but does not undo the text change made on step 2.

Example 2:
The first Undo operation deletes the last bullet point. Further Undo operations do nothing.
Edit -> Redo is greyed out, so is not possible to recover this deleted bullet point.

Expected results:

In Example 1, it should be possible to restore the text entered on step 1 with multiple undo operations.

In Example 2, the first Undo operation should have undone converting the selected lines of text into a list. The Redo operation should recover what was undone.