185600 - Arabic align=justify should use Tatweel (Kashida) characters

Status: NEW

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

Description

[Thamer Mahmoud]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3a) Gecko/20021212

This is not only for aesthetics but also for a much increased readability of
justified Arabic text in Mozilla.

TO REPRODUCE:

Resize included testcase in IE6 and Mozilla and see if Tatweel characters are
being added to the arabic words.

ACTUAL: No Tatweel in Mozilla
EXPECTED: Same as IE6

Comment 1

[Thamer Mahmoud]

Attachment: testcase

Comment 2

[Simon Montagu :smontagu]

Confirming and taking. I think this belongs more in Layout: Fonts and Text than
Bidi.

Comment 3

[Simon Montagu :smontagu]

On Windows the solution is to use Uniscribe APIs. Jungshik, does Pango include
support for justification with Kashida?

Comment 4

[Jungshik Shin]

Simon, Pango doesn't. See http://bugzilla.gnome.org/show_bug.cgi?id=64538
Besides, Pango doesn't support yet 'simple'  diacritic marks (with no GPOS
associated with them) for Arabic.
http://bugzilla.gnome.org/show_bug.cgi?id=117282 

Comment 6

[Farzad]

Attachment: i sent the photo of different displaying in IE and FireFox

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

The bug assignee didn't login in Bugzilla in the last 7 months.
:jfkthame, could you have a look please?
For more information, please visit auto_nag documentation.

Comment 8

[Jonathan Kew [:jfkthame]]

Still a valid request, although the specific APIs involved will have changed as we no longer use uniscribe or pango. (Note that I don't think harfbuzz yet offers a justification API, so it's unclear how best to move forward here...)