bug#14324: 24.3; GTK scrollbar doesn't scroll proportionally when Line Wrapping is set to "Truncate Long Lines"

[Lars Ingebrigtsen]

j.pertres@gmail.com writes:

> To reproduce:
>   1. Visit a buffer with very long lines, and long enough to make Emacs 
> render a
>   vertical scrollbar
>   2. In the Options menu, set the option "Line Wrapping" to "Truncate
>   Long Lines"
>   3. Drag the scrollbar to navigate the file. Emacs won't scroll
>   proportionally, but rather get stuck at some points, seemingly at
>   those very long lines, maybe as if they were still shown in multiple
>   lines, even though now they don't.

I can confirm that this problem is still present in Emacs 28.

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   bloggy blog: http://lars.ingebrigtsen.no