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Internationalized Terminal Emulator Framework
Jiro SEKIBA <jir@yamato.ibm.com>
* What is This ?
This is a platform-independent framework for making Internationalized
Virtual Terminal Emulator. Implementing platform-dependent part of this
framework, you can easily build internationalized virtual terminal/Widget.
You can obtain latest .tar.gz package from following URL..
http://www-124.ibm.com/linux/projects/iterm/
or latest codes from CVS Repository as below..
cvs -d:pserver:anonymous@cvs.li18nux.org:/cvsroot login
cvs -d:pserver:anonymous@cvs.li18nux.org:/cvsroot co iterm
The distribution consist of 4 parts, such are
- lib
libiterm, the terminal emulator library.
- unix/fbiterm
terminal emulator for framebuffer, which uses libiterm.
- unix/Xaw/lib
libXiterm, the terminal emulator widget library.
- unix/Xaw/src
terminal emulator for X, which uses above widget and libiterm.
Please check Documents in each directory for further information.
* Overview
The iterm is the multi-platform capable I18N terminal emulator, based
on the Model-View-Controller(MVC) architecture. The MVC model provide
portabilty and consistency among terminal emulators, including
framebuffer based Console.
Here is the architectural diagram of iterm.
frame Athena gtk+ based Qt based Other
buffer Widget GNOME KDE Widget
i18n based X termianl terminal based
console terminal terminal
+--------+---------+-----------+----------+--------+
| | xiterm |GNOMEiterm | KDEiterm | *iterm |
|fbiterm +---------+-----------+----------+--------+
| |libXiterm|libgtkiterm|libQtiterm|etc.....|
+--------------------------------------------------+
| libiterm |
+--------------------------+ |
| Pluggable BiDI engine SPI| |
+---------+-------+--------+-----------------------+
|Sun PLS |IBM PLS|FriBiDi |
|liblayout| | |
+---------+-------+--------+
The foundation of the I18N terminal emulator "libiterm" implements
the "View" independent core I18N terminal emulator capability,
including BiDi support. The libiterm includes pluggable BiDi engine
SPI. At this moment, Sun's opensourced PLS library(liblayout), IBM
PLS library, and FriBiDi are supported.(At this moment, only libiterm,
fbiterm, libXiterm and xiterm are available).
* ToDo
- IM support
- Gnome, KDE widget
- Tuning ;-)
* Known Bugs
- doesn't shape Arabic characters when compiling with libfribidi.
* Reporting bugs/Discussion
- Bug report of iterm are mainly accepted on li18nux-utildev, on which
also discussion about iterm are held. Please refer the following URL
for joining the list.
- http://www.openi18n.org/ml/
* FAQ
Q1. I can't erase character other than ASCII by backspace, is this a bug?
A1. This is not a bug of terminal emulator, but a problem of shells.
Q2. When I use it on UTF-8, command line folding is strange!
A2. This is also the problem of shells.
You can solve these problems by using I18Ned shell.
You can get I18N patch against bash-2.05 from URL below.
http://oss.software.ibm.com/developer/opensource/linux/patches/?patch_id=34
Q3. When I start xiterm, following error message appears
> Warning: locale not supported by Xlib, locale set to C
but I have the locale in /usr/lib/locale directory, is this a bug?
A3. Do you set your LANG like ja_JP.utf8? X locale mechanism is case
sensitive. So you have to set your LANG as ja_JP.UTF-8.
Q4. on UTF-8 locale, xiterm seems very odd.
A4. You may need to specify fontset by -fn option.
I recommend unifont(http://czyborra.com/unifont/) for UTF-8 locale.
Note: iso10646 fonts XFree86 bundles contain very limited glyphs.
You have to choose -ja- font if you want to display Japanese.
But ascii part of the font is, what we call, double width,
as a result, it'll be very ugly.
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