391922 - rendering of arabic should have joined characters

Status: RESOLVED WORKSFORME

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

Description

[Atif.hussain]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6

وَإِذَا قِيلَ لَهُمْ لَا تُفْسِدُوا۟ فِى ٱلْأَرْضِ 
should have been rendered with joined characters.
1. In Arabic, script is in a running writing. Most characters of words are joined
2. To handle that, Consonant characters are displayed differently based on whether they are 1. in the middle of a word, 2. end of a word, 3. beginning of a word, 4. standalone.

In, Gecko text rendering engine currently does a proper Choice of glyph for the character according to its position, but when a vowel is attached to after it, gap arrives between the characters. This should not happen, must be contiguous.

Contiguous like وإذا قيل لهم لا تفسدوا فى ٱلأرض
with vowel marks over and below the consonant characters

Reproducible: Always

Steps to Reproduce:
1. View an arabic language text with vowels in Firefox, and a reference in IE (here, IE renders correctly)
2.
3.
Actual Results:  
rendered as:
وَإِذَا قِيلَ لَهُمْ لَا تُفْسِدُوا۟ فِى ٱلْأَرْضِ

Expected Results:  
should have been: 
وإذا قيل لهم لا تفسدوا فى ٱلأرض
with vowel marks over and below the consonant characters

universal problem in text rendering engine. Can be repeated any no. of times.

Comment 1

[Jo Hermans]

works for me on the latest trunk-version (will become Firefox 3), see http://img74.imageshack.us/img74/8923/screenshotez9.png

Comment 2

[Atif.hussain]

It is not working in the latest release Firefox v2.x. 

Fixed in the latest trunk-version.

Comment 3

[Jason Bassford]

Fix / patch for fix not referred to.

-> WORKSFORME