Ray Satiro Reporter
	Description • 9 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20150118030202

Steps to reproduce:

I often will select text in a webpage. For example my e-mails in yahoo webmail. Rarely it has happened that when I click and drag the first time over some text isn't selected. When I click and drag the second time over the same text it will be selected.


Actual results:

See above. This could be my mouse going but I'm filing here in case there is someone with a similar problem. I haven't had this happen to me outside of Nightly. I'm using e10s primarily.

Does Nightly have some sort of debug log I can enable to see what mouse messages were received so I can see if the click is actually being picked up by the tab?


Expected results:

The text should be selected on the first drag.

	:Gijs (he/him)
	Comment 1 • 9 years ago

Did you try this on a clean-ish profile, and does it happens there, too?

	Ray Satiro Reporter
	Comment 2 • 9 years ago

(In reply to :Gijs Kruitbosch from comment #1)
> Did you try this on a clean-ish profile, and does it happens there, too?

It happens rarely so I don't think I'll be able to reproduce there. I do not have any extensions enabled in this profile at all. Plugins only flash which is set ask to activate.

	Ray Satiro Reporter
	Comment 3 • 9 years ago

(In reply to Ray Satiro from comment #2)
> Plugins only flash which is set ask to activate.

Correction, I also have the OpenH264 plugin which is set to always activate.

	Liz Henry (:lizzard Please n-i to RyanVM, jcristau, or pascal)
	Comment 4 • 9 years ago

I tried some text selecting (dragging with the cursor) in Nightly with e10s on and off. I haven't been able to reproduce this. 

Ray, if you have clear steps to reproduce the issue, please let us know!

	Ray Satiro Reporter
	Comment 5 • 9 years ago

I still have this issue every once in a while. Do you have any ideas of what I can do to help diagnose? Thanks

	Ray Satiro Reporter
	Comment 6 • 9 years ago

Ok I have a repro. Here is the problem. Selecting text after using the middle mouse button to scroll down the page doesn't work. Go here:
http://www.theatlantic.com/features/archive/2015/02/what-isis-really-wants/384980/
Press the middle mouse button and move the mouse to scroll down the page. Now press the middle mouse button again to release the scroll. Now try to select some text. Nothing will be selected.
Reproducible e10s windows only.
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:38.0) Gecko/20100101 Firefox/38.0
gecko.buildID = 20150222030206

	Jim Mathies [:jimm]
	Comment 7 • 9 years ago

I can reproduce with the middle-click scroll then try to select text. Focus seems off after drag scrolling shuts down.

	Neil Deakin Assignee
	Comment 8 • 9 years ago

This is the same issue as 1066663. What happens:

1. Autoscroll moves focus to the chrome window.
2. Closing it and clicking causes focus to move back to the content window. This causes the child to receive a WindowRaised, and the selection drag state is reset.

Another possible fix that I will investigate is to not adjust the focus when autoscroll is turned on.

	Neil Deakin Assignee
	Comment 10 • 9 years ago

Comment on attachment 8621152 [details] [diff] [review]
Potential fix

Don't see any issues with this, but am limiting it to the content process. Will work on a test.

	Mats Palmgren (inactive)
	Comment 11 • 9 years ago

Comment on attachment 8621152 [details] [diff] [review]
Potential fix

I don't know what this block is trying to do in the first place.
Is it just an old wallpaper?  Why can't we just remove it?

Sorry, but I think you want someone who understands e10s and
the current focus management code to review this.

(In reply to Neil Deakin from comment #8)
> This is the same issue as 1066663. What happens:
> 
> 1. Autoscroll moves focus to the chrome window.

That seems like the real bug to me.

	Neil Deakin Assignee
	Comment 12 • 9 years ago

OK, when I tried it earlier it didn't work, but, this does in fact work.

A test for this will be added as part of bug 1131626.

	Pulsebot
	Comment 13 • 9 years ago

https://hg.mozilla.org/integration/mozilla-inbound/rev/24fa5a522093

	Carsten Book [:Tomcat]
	Comment 14 • 9 years ago

https://hg.mozilla.org/mozilla-central/rev/24fa5a522093

	Firefox Bug Husbandry Bot
	Comment 15 • 7 years ago

Moving from Core::Untriaged to Core::General https://bugzilla.mozilla.org/show_bug.cgi?id=1407598