I'm trying to create my own language definition, and use it for highlighting the syntax in my app.
The issue I have is that, when trying to access the language definition from my app's data folder (/usr/share/myapp/), even using the c.lang file copied from /usr/share/gtksourceview-3.0/language-specs/, just to test, I get this error at runtime:
GtkSourceView-WARNING **: Failed to load '/usr/share/myapp/c.lang': could not find the RelaxNG schema file
So it's asking for some schema file? So I went forward and copied every file from the language-specs folder that isn't a lang file, which includes: language.dtd, language.rng and language2.rng.
Now, when I run again, I get these errors:
GtkSourceView-WARNING **: in file /usr/share/com.github.aleksandar-stefanovic.urmsimulator/c.lang: style 'def:comment' not defined
GtkSourceView-WARNING **: Failed to load '/usr/share/com.github.aleksandar-stefanovic.urmsimulator/c.lang': unable to resolve language 'def'
What does that even mean? Is that something namespace-related? It is very peculiar, because the exact same file is working perfectly when in gtksourceview folder.
Any clues? Do these "RelaxNG" files work only in their original directories? If so, how can I change that? I've looked into the files, but failed to find any reference to their original folder...
This is the source-code (in Vala) related to the issue:
var manager = Gtk.SourceLanguageManager.get_default ();
string search_paths[] = {"/usr/share/myapp", null};
manager.set_search_path (search_paths);
var buffer = new Gtk.SourceBuffer.with_language (manager.get_language ("c"));
The application does in fact find the language "c", I've checked by debugging.
