Hi! After reading your message, I tried out a few different ways of using the “Underline files” option on my device. It was a bit challenging for me to get it to work in the ways that I intuitively expected, and in checking the KDE Bugtracking System, there are a couple other examples of folks running into unexpected behavior with that feature:
- 410645 – "Underline files" feature works only intermittently
- 431898 – underline files doesn't work well for grep result
If I’m thinking of it correctly, parsing line numbers as you’re describing is distinct from those issues, though - so it’s likely worthy of its own report.
One question to narrow that down, though - does the custom command work when you click on the path to a text file that isn’t appended by a line and column number reference?