940671 - Caret invisible at some position when using scaleX on a contenteditable element

Status: NEW

(Core :: Layout, defect, P5)

Description

[email]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36

Steps to reproduce:

I’ve a element with the contenteditable attribute and it’s scale down with CSS propety scaleX(0.85).


Actual results:

When I moving the typing caret in the content, sometime the caret disappear. If i change the scaleX value, the position where it disappear in the contenteditable element change.


Expected results:

I should always been able to see the blinking typ

Comment 1

[email]

Fixed explanation:

Expected results:
I should always been able to see the blinking caret at any position in the contenteditable element.

Comment 2

[email]

Here’s a testcase: http://sourceresult.com/7643851

Let me know if you need more details.

Comment 3

[[:Aleksej]]

Reproduced with 2013-11-25-03-02-01-mozilla-central-firefox-28.0a1.en-US.linux-x86_64, when zoomed out one level.

See also bug 472555.

Comment 4

[(no longer active)]

The caret is drawn in layout.  Could this be a sub-pixel rounding issue?

Comment 5

[email]

(In reply to :Ehsan Akhgari (needinfo? me!) from comment #4)
> The caret is drawn in layout.  Could this be a sub-pixel rounding issue?

Yes, this is what I think.

Comment 6

[Timothy Nikkel (:tnikkel)]

nsCaret::ComputeMetrics is where it looks like the caret width is computed.