94745 - Mozilla display less CJK charcters than it should be

Status: VERIFIED FIXED

(Core :: Internationalization, defect, P4)

Description

[Frank Tang]

MacOS X come with many CJK fonts which have a lot of CJK charcters
Reproduce proceudre
1. You need to install Language kits which are optional installation in MacOS X. 
Install all of them
2. bring up "Applications:TextEdit" with an empty page. 
3. In mozilla,  go to http://people.netscape.com/ftang/demo/ncr.cgi?r=0x5c=0x0
You will see some characters display some not.
4. copy all the text below the table in the "Propotional Font" Part in that pate
 and paste into TextEdit
The copy and paste is good, you will see TextEdit will display some CJK 
characters and display the rest by using "Last Resort Fonts" while Mozilla 
display them by using "?"
If you look carefully, you will see TextEdit display more characters than 
Mozilla, for example, In the first row, mozilla cannot display 5 characters, but 
TextEdit cannot display 4 characters. Mozilla cannot display U+5001
in the second row, mozilla cannot display 5 characters, but TextEdit cannot 
display 4 characters. Mozilla cannot display U+5010


Here are the character that mozilla cannot display but TextEdit can:

5001
5010
5024

Comment 1

[Frank Tang]

I already have my TTF CMAP parsing patch (see bug 90804) in my local build while 
I see this. I guess the problem could be
1. the font which contains that glyps is not TrueType font (Open Type?)
2. The font is not encoded in platform =3 platforntSpecific=1
I probably need to tweak my TTF CMAP parsing code later to make this work. 

Comment 2

[Frank Tang]

move to m94

Comment 3

[Hong Kwon]

Frank, is this going to make 0.9.4?  Do you have reviewers?

Comment 4

[Frank Tang]

no, move to m0.9.5

Comment 5

[Frank Tang]

move to m97

Comment 6

[Jean-Marc Desperrier]

Does this really block bug 90804 ?
Can't you land the patch for 90804 and solve this remaining problem later ?
I have the feeling the current state is good enough for most use, if people want  
exotic characters, they are used to importing the font needed, they are lots of 
PC TTF font your code should be able to parse around, so they won't be so much 
annoyed.

Comment 7

[Frank Tang]

fixed and check in 

Comment 8

[Yuying Long]

The characters in that range are display same amount as in apple textEditor on
11-19 trunk build.

Mark it as verified.