780582 - Text gets selected just by hovering the mouse over

Status: RESOLVED FIXED

(Core :: DOM: Selection, defect)

Description

[Simona Badau, Desktop Test Engineering]

Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0

While verifying Bug 761572 I stumbled upon this issue.

Reproducible: always

Steps to reproduce:
1. Navigate to https://bug761572.bugzilla.mozilla.org/attachment.cgi?id=630142
2. Click on the 'Set display to none' button
3. Move the mouse over the text without clicking on anything.

Expected results:
The background text doesn't get selected. 

Actual results:
The background text gets selected. After hitting the OK button from the prompt displayed in step 2 the issue doesn't reproduce.

Comment 1

[Alice0775 White]

#1  Alert box does not  pop up
#2  Fixed #1, but selection problem happens 

#1 Regression window(m-c)
Good:
http://hg.mozilla.org/mozilla-central/rev/f6d082275253
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120530012752
Bad(Alert box does not  pop up):
http://hg.mozilla.org/mozilla-central/rev/b5af439f1717
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120530042453
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=f6d082275253&tochange=b5af439f1717

#1 Regression window(m-i)
Good:
http://hg.mozilla.org/integration/mozilla-inbound/rev/cfd001299d34
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120529021158
Bad(Alert box does not  pop up):
http://hg.mozilla.org/integration/mozilla-inbound/rev/d0beb7e43cc4
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120529061423
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=cfd001299d34&tochange=d0beb7e43cc4
#1 Suspected: Bug 758179


#2 Regression window(m-c)
Bad(Alert box does not  pop up):
http://hg.mozilla.org/mozilla-central/rev/5891cc95eac7
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120607140205
Bad(Fixed #1, but selection problem happens ):
http://hg.mozilla.org/mozilla-central/rev/22bb7d46bb23
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120608081921
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5891cc95eac7&tochange=22bb7d46bb23


#2 Regression window(m-i)
Bad(Alert box does not  pop up):
http://hg.mozilla.org/integration/mozilla-inbound/rev/5a1dc5b1ecbb
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120607014319
Bad(Fixed #1, but selection problem happens ):
http://hg.mozilla.org/integration/mozilla-inbound/rev/4f28fd1e2d81
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120607030819
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=5a1dc5b1ecbb&tochange=4f28fd1e2d81
#2 Suspected: Bug 761572

Comment 2

[Lukas Blakk [:lsblakk] use ?needinfo]

Assigning to roc to take a look, since bug 761572 is being fingered as the potential culprit here, tracking as well for being a 15 regression, would be great to never ship this.

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

I'll work on this, but I don't think we should worry about it for FF15. It's a minor bug that only happens in situations where we were completely broken before (i.e. in the testcase, the alert box not popping up).

Comment 4

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: fix

This fixes it.

I haven't been able to find a good way to test this. For some reason the alert() is needed; without it, nsFrame::HandleRelease isn't called, but somehow mouse movement stops selecting anyway.

Comment 5

[Robert O'Callahan (:roc) (email my personal email if necessary)]

https://hg.mozilla.org/integration/mozilla-inbound/rev/d75263064dc5

Comment 6

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/d75263064dc5

Comment 7

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Comment on attachment 649543 [details] [diff] [review]
fix

Review of attachment 649543 [details] [diff] [review]:
-----------------------------------------------------------------

So far so good. I think this is plenty safe enough for Aurora.

Comment 8

[Lukas Blakk [:lsblakk] use ?needinfo]

This was a regression in 15 and even if the instances of it occurring are rare-ish, it's still nice to never ship something like this that users will run up against and be frustrated by - do you think this is low-risk enough to take before our next Beta?

Comment 9

[Lukas Blakk [:lsblakk] use ?needinfo]

(In reply to Lukas Blakk [:lsblakk] from comment #8)
> This was a regression in 15 and even if the instances of it occurring are
> rare-ish, it's still nice to never ship something like this that users will
> run up against and be frustrated by - do you think this is low-risk enough
> to take before our next Beta?

Just got info from roc in email and I agree with him that this bug is not important enough to take so late in Beta, see comment 3 as well.

Comment 10

[Lukas Blakk [:lsblakk] use ?needinfo]

This still needs to land on Aurora, wontfixing for FF15.

Comment 11

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-aurora/rev/65ac00871b6e

Comment 12

[Simona Badau, Desktop Test Engineering]

Verified on Firefox 16 beta 4 that the text does not get selected anymore when hovering the mouse over (used the test case from the Description).
Mozilla/5.0 (Windows NT 6.1; rv:16.0) Gecko/20100101 Firefox/16.0
Build ID: 20120919065210

Comment 13

[Simona Badau, Desktop Test Engineering]

Verified as fixed on Firefox 17 beta 1 - the text does not get selected when hovering the mouse over.
Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/17.0 Firefox/17.0

Comment 14

[Tracy Walker [:tracy]]

mass remove verifyme requests greater than 4 months old