[Evolution-hackers] i18 things

[Alex Jiang <alex jiang sun com>]

Hi, 

I am now working on i18n issues of evolution.

There are several things I think we should do to improve the i18n
performace of evolution.
First, c the patch for bug 40519. which make
sure whenever we call iconv, there is a 
charset(locale_charset for default), so a uniform manner is applied. 

Secondly, display charset should be stored in gconf(for each
folder(vfolder?)). Or, when 
we change the display charset,  functions like 
process_header()/header_decode_string() will 
not be affected(and it's not easy to pass the chosen charset to them),
which may lead 
to bug 40521 . i.e. those
multibyte subject/sender... which not following rfc2047, will not 
be readable(But this happens very often)

Third, when we open evolution twice in different locale, the summary
file will not be rebuilt.
 So, improperly converted subject/title will remain unreadable. One
possibly runnable way is 
to make summary in a "mbox.ev-summary.gb2312","mbox.ev-summary.en" way.
But the final 
solution is that we be ablet ot change the summary file when we change
the charset of a mail 
(c the next item) or of a folder.

Fouth, we should be able to madatorily change the charset of a single
mail. so perhaps a UI 
method will be introduces first(e.g. when we change the charset in the
mail window, the mail's 
charset will be changed, while we change in the folder view, folder
charset will be affected). 
Perhaps, to keep the wholesome of the summary file, a user-defined tag
in the CamelMessageInfo 
struture will be used to define the charset of a single mail.

I believe with these steps, the i18n problems now exist in evolution
will be finally solved.  (By now, 
I haven't touch gtkhtml, so for  bug 40520, 
I don't know why). It really needs a lot of work, 
so before I make any patches, I hope to receive your kind suggestions.

Thanks a lot.

Alex Jiang