Bear with me as this is the first thing I've ever done with
Intellij-IDEA plugin development.
I tested this and I believe I fixed the problem. The cause of the
problem was that the code was checking if the mark was in a different
file but if it was, it was using the editor of the current file to go
to the line of the mark. I changed the code so that it opens the file
of the mark first, then jumps to its line number.
I need a VirtualFile so that I can get the Editor to open. The Mark
stores the path of the file it's in, but the path is not enough
information to get a VirtualFile. I also need the "protocol" of the
file. So, I had to change the structure of the Mark and add a
"protocol" field to it.
I had to update the save/load logic to use this new field, too. This
way, when you restart Intellij-IDEA, the marks can still be used. For
old marks, I defaulted the "protocol" to the value of "file".
One thing I couldn't figure out how to do is add a test case to check
that this is working correctly. This is not due to a lack of effort.
In fact, I tried to write the test case first. But I have been unable
to find any examples anywhere of testing multiple Editors, and that's
what's involved to fix this issue. Because of this, this issue may be
best used as a reference to fix the problem instead of worthy of being
used in production. Either way, I'd love to know how to write such a
test.
