1825372 - When dragging messages to a folder, should expand closed subfolders on hovering the parent folder

Status: RESOLVED FIXED

(Thunderbird :: Folder and Message Lists, defect, P2)

Description

[Bill Falls]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/112.0

Steps to reproduce:

Dragged a message from a folder (e.g., inbox) to another folder that contains a subfolder where I want to file the message.

Actual results:

Nothing happened. I had to return the message to the original folder, then click to open the new parent folder, then repeat the drag-and-drop to the intended subfolder.

Expected results:

The parent folder should expand on hover to show the subfolders to allow drag-and-drop in one step. All previous versions of TB have worked this way

Comment 1

[Thomas D. (:thomas8)]

Confirming for Daily 113.0a1 (2023-03-29) (64-bit), Win10.
This is a notable usability regression. Workarounds are clumsy: Abandon drag and open target folder first, or use context menu, move-to.

Comment 2

[Bill Falls]

The issue is still present in TB113.0b1 (64-bit) Windows and is not mentioned in the release notes.

Comment 3

[Geoff Lankow (:darktrojan)]

Attachment: Bug 1825372 - Expand folder tree rows when a drag operation hovers on them. r=#thunderbird-front-end-reviewers

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/ec4c75c93aa9
Expand folder tree rows when a drag operation hovers on them. r=elizabeth

Comment 5

[Wayne Mery (:wsmwk)]

Comment on attachment 9329184 [details]
Bug 1825372 - Expand folder tree rows when a drag operation hovers on them. r=#thunderbird-front-end-reviewers

[Triage Comment]
Approved for beta

Thanks. Working nicely on daily

Comment 6

[Rob Lemley [:rjl]]

Thunderbird 113.0b5:
https://hg.mozilla.org/releases/comm-beta/rev/cf9ddd5614a7

Comment 7

[gene smith]

While testing my changes involving folder move/copy via context and by d&d (Bug 1831759 and Bug 1828372), I kept noticing something that I couldn't remember seeing before. When I drag a folder or a message over a collapsed folder it expanded and when I dragged over a collapsed account it expanded. Even if I didn't drop anything into a folder I ended up with a lot of expanded folders and accounts cluttering the folder pane.

I have a lot of nested folders and accounts, mostly for test purposes, which makes this issue noticeable.

I compared it to 102 behavior and it also does the auto-expansion but if I don't drop anything and move on, the folders and accounts auto-collapse and I don't end up with a lot of expanded folders and accounts. I think maybe the 102 time to expanded is a bit longer (more than the current 500 ms) but not sure. I don't see the auto-collapse with the current CC tip version, so I have to manually collapse the folders/accounts.

Then I checked the about3Pane.js "blame" and found this bug report.

FWIW, user Richard Leger told me via email that he sometimes sees his folders and accounts expanded and he didn't intentionally expand them. It may be possible he is seeing this issue too (but he didn't mention anything about dragging over the folders/accounts).