236277 - Selection causes cropping of certain italic characters on same line

Status: NEW

(Core :: Layout: Text and Fonts, defect)

Description

[u81239]

User-Agent:       
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7a) Gecko/20040219

As you can see in the attached test case, and as is described in the steps,
Mozilla will crop italic characters on the (top) right when they are selected.
Most of the time this isn't noticable, as most characters don't er... overlap...
the next character, but some such as an l and a / do, and the overlapping part
seems to be overwritten by the next character.

Also if you select a region *after* the italic part (on the same line), the
cropping will also occur. This makes me think it's not really a 'selection'
problem, but that's for you to figure out :).

It's certainly not a critical bug :), but an bit annoying one. p.s. Maybe it is
of relevance to know that I have 'cleartype' enabled (though it seems to me that
more of the character is removed than to only account for that).


~Grauw

Reproducible: Always
Steps to Reproduce:
1. Create an HTML document.
2. Insert for example the line <p style="font: small Verdana,
sans-serif;">Another test with CSS <span style="font-style: italic">Verdana
l</span>...</p>
3. Select the italic part, plus some more.
Actual Results:  
The top right of the 'l' is cropped.


Expected Results:  
The selection should show just as before (it mustn't crop), but with a blue
background.

Comment 1

[u81239]

Attachment: Testcase.

Comment 2

[Alex Hirzel]

WFM Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7a) Gecko/20040219

Comment 3

[Christopher Hoess (gone)]

I can see the bug in its entirety (cropping on selection and cropping on nearby
selection) on Windows XP, build 2004022016.

Comment 4

[Simon Montagu :smontagu]

Probably a dupe of bug 96041 and/or bug 15116.

Comment 5

[Jesiah S]

*** Bug 249174 has been marked as a duplicate of this bug. ***

Comment 6

[Jesiah S]

I see this using LInux 2004090205 GTK1 and LInux 2004082721 GTK2/xft.  I had to
enlarge the font-size to see it happen in LInux.

Comment 7

[Uri Bernstein]

*** Bug 317796 has been marked as a duplicate of this bug. ***

Comment 8

[Cameron]

Attachment: testcase using Lucida Grande

I find this to be far more noticeable with the Lucida Grande font. Attached is a testcase.

Comment 9

[Cameron]

Attachment: Screenshot of attachment 240297 on Firefox 2.0b2 on Windows XP

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1b2) Gecko/20060821 Firefox/2.0b2 ID:2006082101

Comment 10

[Ellis Lau]

Attachment: setTimeouts are used to shift an italicized span, leaving a trail of rendering artifacts

It's really noticeable if you're trying to animate italicized text...