[dolphin] [Bug 435771] New: Filenames with .mkv extension have their labels incorrectly cropped when "Maximum lines" is set.

[Alexander M.]

https://bugs.kde.org/show_bug.cgi?id=435771

            Bug ID: 435771
           Summary: Filenames with .mkv extension have their labels
                    incorrectly cropped when "Maximum lines" is set.
           Product: dolphin
           Version: 20.12.3
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: view-engine: icons mode
          Assignee: dolphin-bugs-null at kde.org
          Reporter: apmihalopoulos at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 137632
  --> https://bugs.kde.org/attachment.cgi?id=137632&action=edit
If you can't say it, show it.

SUMMARY

First, a disclaimer: this may well have additional parameters as to when it's
triggered or what triggers it. What I have tested is my own configuration,
because the possible combinations are too many. You'll hopefully understand
when you read further.

Now the issue: I use Dolphin in Icons view mode and set the file label to show
a maximum of 3 lines of a filename before it crops it; I also have the size of
a file shown as an additional line, which becomes the 4th line when the label
is at max size.

I noticed that with MKV files, when the part of the filename ("part" as in
character sequences separated by spaces) that needs to be cropped is the last
one before the extension, then that part will be cropped one character later
and the cropped label will actually span 4 lines instead of 3 because the
extension part will overflow, with that extra 4th line overlapping the actual
4th line that displays the size.

My attempt at describing this is lame, I know, and pictures speak volumes
compared to words in this case, so please take a look at the screenshot. Short
explanation:

1) First three files have a filename of "1 - This is a really long name to be
tested.XXX"

2) Next three files have a filename of "2 - This is a
reeeeeeeeeeeeeeeeeeeeeeeeeeally long name to be tested.XXX"

3) Last three files have a filename of "3 - This is a really long name to be
teeeeeeeeeeeeeeeeeested.XXX"

Notice how in the third case, the file with the .mkv extension is exhibiting
the issue I'm trying to describe. Also note that all of these files are
actually text files with a modified extension, and copies of each other: I just
created "1 - This is a really long name to be tested.txt" and
duplicated/renamed that as needed. In other words, it obviously doesn't have to
be an actual MKV file in order to trigger this.


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Arch Linux with latest stable versions of everything KDE and
Qt5.


ADDITIONAL INFO:

I've found this old bug report here from back in the 4.x days that describes
the exact same issue, so maybe this is a regression:

https://bugs.kde.org/show_bug.cgi?id=337104

In my case it's not a dot that produces it, but I have also noticed that in
other problematic files, when there is a dot in the last part/word of the
filename, the cropped label will end in ".....mkv", i.e. 4 dots + .mkv",
instead of "....mkv", i.e. 3 dots + .mkv (as it is for pretty much every other
extension I've tried).

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