Version: unspecified (using Devel) OS: Linux There is 'Preview' action already, unfortunately it uses internal previewer which is very simple and in many cases broken (like for .diff files - shows partial diff, barely useful). 'Open with' action would be very useful, esepcially if it resembled its functional equivalent from Dolphin. Reproducible: Always
With regard to the specific case of diff files, it depends on the KPart associated to this mimetype: you're most likely using KDiff. If you use KatePart, the diff file should be shown in its entirety. *** This bug has been marked as a duplicate of bug 179066 ***