User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:126.96.36.199) Gecko/20100625 Firefox/3.6.6 ( .NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:188.8.131.52) Gecko/20100625 Firefox/3.6.6 ( .NET CLR 3.5.30729)
The caret ("cursor") disappears when positioned from the left just before a span with set background-color style in iframes in designmode. This is a major problem in all existing rich text editors.
It only happens when moving the caret to the right, not when moving the caret to the left. It also happens only on the left side of the span. It does not happen when setting other styles such as color or border. It happens for all tested inline elements (<span>, <font>, <i>). It does not happen if the start of the span is at the beginning of a new line, e.g. after a <br> or for block level elements.
Created attachment 458195 [details]
Created attachment 458196 [details]
Created attachment 458198 [details]
A similar but maybe unrelated bug is described in 579763.
A similar but maybe unrelated bug is described in bug 579763.
I can confirm this for FF 3.6.12 as well as today's nightly build of FF 4.0b8pre using Windows XP SP3.
Changing the status to "New," as this is confirmed in the latest nightly build of Firefox on my end.
Created attachment 8451457 [details]
Here's a real world example:
1. Go to https://docs.google.com/spreadsheets/d/1-CERGJ75bZKrk73cWCqXtU2yBQYbNkSraymMW96efeo/edit?pli=1#gid=1950799756
2. Switch to the 'Abs. Numbers Monthly Summary' sheet
3. Select table cell B19
4. Click between the equal sign and the apostrophe inside the formula input field
Here's a simpler test case (using contenteditable):
data:text/html,<!DOCTYPE html><div contenteditable="true">a<span style="background:lightblue;">b</span></div>
Set the text cursor before the a and then move it one to the right.
=> The text cursor disappears.
Build identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Firefox/38.0
Can confirm it's there in FF 38.0.1
Can I work on this? It's my first bug. I heard editor code can be a bit hairy. But I feel I can do it.
I think I didn't reply to this earlier. If so, sorry for that!
I assigned the bug to you now, Sreejith. Thank you for taking it over! Please let me know if I can be of any help!
@Sebastian I'll start on this. Will let you know about updates.