categorize Ceylon Problems by module

[gavinking]

We should add an additional level of categorization.

[gavinking]

I can't do this until @davidfestal or @bjansen can suggest to me a way to get the Module associated with a SourceFileMessage. I do have an IntelliJ VirtualFile, but I don't know what to do with it.

[bjansen]

You should modify SourceFileMessage and SourceFileWarning to also hold the projectPhasedUnit (see retrieveErrors() in CeylonProjectBuild.ceylon). With the PU you have access to the package and the Ceylon module.

[davidfestal]

@bjansen, you don't need to do that. Let me have a look.

[davidfestal]

I think we should simply have the SourceFileMessage classes reference the FileVirtualFile instead of the NativeFile. This gives a direct access to all needed information. I'll try to do it today.

[gavinking]

@davidfestal it's probably not worth wasting time on this for 1.2.3.