java-gnome 4.0.13 (27 Aug 2009)
Unicode. It’s bigger than you think.
This is a bug fix release to address a serious weakness in Java’s handling of Unicode characters.
It turns out that Java’s chars are not pure Unicode codepoints. Most
people know that Java String objects are arrays of Java chars, but in
aggregate they are encoded in UTF-16 in order to deal with the fact that there
are Unicode characters whose index is higher than
0xFFFF and which need more
than two bytes to identify them. It’s a problem that an application developer
has to deal with if they’re using high-range “supplementary” Unicode
characters, but wasn’t something that would break java-gnome…
Except it turns out that the Java VM does not do UTF-8 translation properly. It has a hard wired limitation preventing it from writing out UTF-8 sequences longer than 3 bytes. Who knows what crack they were smoking when they decided that one. But things like TextView / TextBuffer work in characters, so we need characters. (actually, they work in UTF-8 bytes, but the offsets in our public API are the characters variants).
Luckily, we can get at the raw UTF-16 arrays backing Strings, and so in combination with GLib’s character set conversion functions, we’ve been able to redo our string handling internally so as to have correct treatment of Unicode codepoints. Lots of testing.
This surgery was almost entirely internal; Strings returned by java-gnome methods are of course still Java String objects.
This release also features the work of Guillaume Mazoyer exposing some of the new features available in Entry Widgets, including displaying icons and showing progress bars in the background. This compliments other minor enhancements to various miscellaneous classes.
With this release, java-gnome now requires GTK
2.16 or newer.
You can download java-gnome’s sources from
ftp.gnome.org_, or easily checkout a branch from_ ‘
$ bzr checkout bzr://research.operationaldynamics.com/bzr/java-gnome/mainline java-gnome
though if you’re going to do that you’re best off following the instructions in the