75047 - Bidi: LamAlef ligature from 864 to 06 range

Status: RESOLVED WORKSFORME

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

Description

[Maha Abou El-Rous]

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 98)
BuildID:    00000000 - Bidi build dated 20010404

Bidi: LamAlef converts to one character only from 864 to 06 range. It should be 
two characters 

Reproducible: Always
Steps to Reproduce:
1.Open an Arabic visual file with LamAlef in the text
2.Force the text type to be Logical


Actual Results:  the lamAlef ligature becomes only Lam character

Expected Results:  It should convert to two characters Lam and Alef.

Comment 1

[Frank Tang]

please include test cases and two screen shot
bidi functional bugs, move to moz0.9.1

Comment 2

[Frank Tang]

after talk to maha, we decide to fix this by change 864i to unicode converter. We 
need to map the following characters to two unicode
F8 to 0x644 0x622
F9 to 0x644 0x622
99 to 0x644 0x623
9a to 0x644 0x623
9d to 0x644 0x627
9e to 0x644 0x627

Comment 3

[Frank Tang]

I need the origional mapping table. I need to rewrite this converter and cannot 
use the .ut mechanism.

Comment 4

[Maha Abou El-Rous]

Attached file cp864.cpg.txt which is the conversion table from 864 to Unicode 
06 range.

Comment 5

[Maha Abou El-Rous]

Attachment: This is the conversion table for 864 to 06 unicode range

Comment 6

[Frank Tang]

mark it as assign

Comment 7

[Frank Tang]

decommit other bidi issue until we land IBMBIDI default on.

Comment 8

[Frank Tang]

reassign to [e-mail]

Comment 9

[Andreas Becker]

Changing QA contact to [e-mail].

Comment 10

[Maha Abou El-Rous]

We could use the ICU shaping engine to shrink/grow for the Lam-Alef in the de-
shaping process.

Comment 11

[Frank Tang]

move to "Bidi-Arabic/Hebrew"

Comment 12

[Zach Lipton [:zach]]

Mass-move all BiDi Hebrew and Arabic qa to me, [e-mail]. 
Thank you Gilad for your service to this component, and best of luck to you 
in the future.

Sholom. 

Comment 13

[Katsuhiko Momoi]

Assigning Arabic bug back to mahar:

[e-mail]

Zach, in future, please re-aasign Arabic specific bug to her. You should
keep Hebrew or Bidi bugs.

Comment 14

[Leston Buell]

In an Arabic e-mail message, i am seeing the lamAlif ligature correctly, but
after each occurrence of such there's a little box with the (Latin) letters
"ZWSP". Is this the same problem?

I will happily upload a screenshot if someone will please tell me how to take
one on Linux. (I will also open a new bug, if this is thought to be a separate
issue.)

I'm using Linux trunk build 2001-11-07-06.

Comment 15

[Simon Montagu :smontagu]

That sounds like a variation on the theme of bug 36163.

Comment 16

[Isam Bayazidi]

I noticed that the ZWSP char that came after complex letters (such as : LAM_ALEF, 
Lam_hamzaonalef, Lam_madaonalef, Lam_hamzaunderalef, and so on ), this ZWAP 
was not in the mozilla 0.9.7, but t returned to the 0.9.8! 

Comment 17

[Leston Buell]

This bug is also on Linux, so please change platform and OS to all. Could we
please do something to enhance the priority of this bug? Because the ligatures
all come out with this humungous ZWAP, even the simplest Arabic pages come out
unacceptable. To make an analogy, it kind of like seeing a smiley face after
every letter "y" which appears in any text on the page. 

Could we please promote this to major and add keyword mozilla1.0.1 or at most
mozilla1.1?

Comment 18

[Simon Montagu :smontagu]

The issue with the ZWSP after LamAlef is filed as bug 117041. It has a patch
attached which will cause other regressions unless the patch in bug 138097,
currently awaiting review, is checked in first.

The original issue of this bug is specific to documents in the IBM-864 encoding.

Comment 19

[Ahmad A. Abu-Taha]

Kindly be informed that Ahmad A. Abu-Taha ([e-mail]) from IBM Egypt is 
replacing Maha Abou El-Rous ([e-mail]) in monitoring and receiving 
notifications of Mozilla bugs regarding Arabic.

Comment 20

[Simon Montagu :smontagu]

I'm unable to reproduce this bug.