fix: left to right filename sanitization

[alperozturk96]

• Tests written, or not not needed

Issue

The purpose of this PR is not to enhance the UI, but to ensure that the correct filenames are displayed. Certain invisible or special Unicode characters can be used to manipulate a filename’s visual representation, misleading users about its true file extension.

e.g. filename: invoiceexe.docRLO this will appear as invoice.doc, but actual filename is invoicedoc.exe. It is not a doc file, it's an EXE file.

Previously, the filename with extension in one text view component was shown; now, we also display the file extension as a separate text view component next to the filename, which is why the UI is changed.

The reason for using two separate text view elements is explained in detail in the mentioned issue.

[alperozturk96]

The remaining issues:

1. In some cases, the “More” button appears to be slightly shifted to the right.

2. Very long filenames may occupy space without showing the extension (e.g., This PR: aaaaaaaaaa..... Master: aaa.....jpg). This occurs because the master currently uses a single text view element and ellipsis in the middle.

Achieving perfectly consistent alignment across all three elements in every scenario does not appear feasible. Using two text view elements makes it impossible to fully match with the master.

Considering that this change will only be applied to bidirectional filenames, I believe the current implementation is acceptable.

Demo:

Screen.Recording.2025-08-22.at.15.29.52.mp4

@tobiasKaminsky @AndyScherzinger

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/15388.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.

[AndyScherzinger]

Fine by me 👍

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	48	48
Errors	11	11

SpotBugs

Category	Base	New
Bad practice	59	59
Correctness	62	62
Dodgy code	283	283
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	35	35
Performance	48	48
Security	18	18
Total	515	515