[konsole] [Bug 505217] New: Resizing by ESC [ 8 ; <width> ; <height> t with larger width/height than fits has unexpected results

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=505217

            Bug ID: 505217
           Summary: Resizing by ESC [ 8 ; <width> ; <height> t with larger
                    width/height than fits has unexpected results
    Classification: Applications
           Product: konsole
      Version First 25.04.1
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: julian at scheffers.net
  Target Milestone: ---

SUMMARY
Using the `ESC [ 8 ; <width> ; <height> t` escape sequence to resize the
terminal will cause the cursor to be at a visually incorrect position if said
width and height are larger than the current window size fits. The problem can
be worked around by switching to another tab and back.

STEPS TO REPRODUCE
1. Open Konsole
2. Pick some width*height larger than the current window size, e.g. 80x80
3. Enter aforementioned escape sequence, e.g. echo -ne '\033[8;100;100t'
4. Scroll all the way down

OBSERVED RESULT
The cursor graphics moves away from where it was due to scrolling, and is at a
vertical offset downwards from where the cursor really is. The screen also has
more scrollable area to apparently match the size request, but I'm not sure
whether or not this second point is intentional.

EXPECTED RESULT
The actual size would be clamped to what fits in the window and scrolling would
not distort the cursor graphics' position.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION
Bug originally discovered due to a virtual machine printing an escape sequence
that triggered it.
Using Arch Linux, Linux kernel currently 6.12.30-1-lts

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