Description of problem: If sender's name contains triple-width characters (for example, সঙ), the vertical lines in the thread tree display become displaced to the right. Version-Release number of selected component (if applicable): mutt-1.5.18-2.fc8 How reproducible: Always. Steps to Reproduce: 1. get fedora-devel-list mailbox for July 2. enable threaded display of mailbox contents 3. scroll down to one of Sankarshan's mails (for example, Message-ID: <486CAE40.2030801>) Actual results: See attached screenshot. Expected results: Vertical tree lines should not be displaced.
Created attachment 311387 [details] Mutt in gnome-terminal screenshot showing the problem
That's a terminal emulator issue, it doesn't support Indic scripts. Very hard to fix.
(In reply to comment #2) > That's a terminal emulator issue, it doesn't support Indic scripts. Very hard to > fix. That may very well be. For example, in mc the triple-width characters are displayed as if they were double-width.
Version-Release number of selected component (if applicable): vte-0.16.9-1.fc8
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Still reproducible on F-10.
As far as Unicode specs are concerned there is no such that as a triple-width character! And where mutt places chars is most probably a mutt issue, not vte. Keeping the bug open here doesn't fix it.
Midnight Commander (mc) also has display issues, so it's not a mutt-only problem.
Those are simply not internationalized apps, so they assume the char takes one cell, while vte knows that it takes two cells.
The applications just use wcwidth(). To fix this, the values returned by glibc have to agree with terminal emulator, but this will be very hard for Indic scripts.
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Still reproducible on F-11.
I was trying to figure out why indic scripts were broken in my little console app, and I found this bug here. According to this article written back in 1998, the problem is with Xwindows. This guy says their fonts need to be extended so the characters can combine properly. I guess this never happened in the last 10 years. A lot of old stuff has to change to make this happen, but, like, there are a billion or so people who use these fonts. It's an actual problem. I'm sure this is an maddening glitch. http://www.cl.cam.ac.uk/~mgk25/ucs-fonts.html The BDF format used by X11 pixel fonts does not have any standardized way of including a character/glyph mapping table, and neither do current BDF editors such as xmbdfed or X servers. The Pango rendering library developed for the Gnome project can make use of BDF glyph fonts, but it requires the corresponding character/glyph mapping table in a separate client-side file. The X11 standards currently provide no support for transmitting such mapping tables over the X11 protocol. I'm not really sure myself, though, couldn't a terminal emulator with ncurses compatibility use Pango to render Indic characters just like all other gtk apps? What am I missing here exactly?
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Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.