Bug 457162

SUMMARY
This is related to commit "Fix Klipper Actions content truncation" (https://invent.kde.org/plasma/plasma-workspace/-/commit/beb34e3d9781c7728260d486a835c52be21a6d83).
When using Ctrl+Alt+R or the "Invoke action" button on a URL, Klipper suggests multiple .desktop files associated with the URL currently in the clipboard, for example browsers for https:// URLs, and video players for a URL like file:///home/user/video.mp4. Unfortunately, this nifty feature doesn't work for URLs longer than 200 characters. Note that doing Ctrl+C in Dolphin on a file and copying manually a file:// URL in the clipboard are different, as the .desktop files will show up for a file whose URL is longer than 200 characters and that has been copied with Dolphin.

STEPS TO REPRODUCE
1. touch /tmp/$(python3 -c 'print("a"*187)') then copy "file:///tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" to your clipboard (not with Dolphin) and press Ctrl+Alt+R see that it works, the Kate .desktop shows up to open the empty file in Kate
2. touch /tmp/$(python3 -c 'print("a"*188)') then copy "file:///tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" to your clipboard and press Ctrl+Alt+R to see that it doesn't work: it does nothing by default, or shows actions added by the user in Klipper's settings.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.13.3