[okular] [Bug 525834] New: Inverted horizontal scrolling and autoscroll direction when zoomed in under RTL locales

[Zayed Al-Saidi]

https://bugs.kde.org/show_bug.cgi?id=525834

            Bug ID: 525834
           Summary: Inverted horizontal scrolling and autoscroll direction
                    when zoomed in under RTL locales
    Classification: Applications
           Product: okular
      Version First 26.08.1
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: fictionbook backend
          Assignee: okular-devel at kde.org
          Reporter: zayed.alsaidi at gmail.com
  Target Milestone: ---

Created attachment 196234
  --> https://bugs.kde.org/attachment.cgi?id=196234&action=edit
Video showing current horizontal scrolling in RTL

DESCRIPTION
When using Okular in a Right-to-Left (RTL) language interface such as Arabic,
horizontal scrolling and boundary drag-scrolling inside a zoomed-in document
operate in reverse. Moving the cursor to the left moves the view to the right,
and vice versa.

STEPS TO REPRODUCE
1. 1. run okluar with Arabic locale, from Konsole:
LANGUAGE=ar_OM:ar LC_ALL=ar_OM.UTF-8 okular 
2. Open any pdf file and zoom in to 200% (or till the horizontal scroll bar
appears)
3. Scroll to left and notice the view direction

OBSERVED RESULT
Scrolling left shifts the document view to the right.

EXPECTED RESULT
Scrolling left shifts the viewport left to reveal content on the left side of
the page.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.6
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-27-generic (64-bit)
Graphics Platform: Wayland


ADDITIONAL INFORMATION

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