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

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> Thanks.  I don't see any issues with this.  I'm not on GTK, so maybe
> this is an issue with GTK scrollbars?

Just so we're on the same page, here's screenshots of the situation.

long1.jpg
Description: JPEG image

This is without truncate-lines.

long2.jpg
Description: JPEG image

With truncate-lines.  Note that the scroll bar has the same identical
length.

long3.jpg
Description: JPEG image

And finally with the lines truncated for real -- note the longer scroll
bar.

So it seems to compute the length of the scroll bar based on the
non-truncated length of the text in the buffer.

> What happens if you customize the value of
> scroll-bar-adjust-thumb-portion?

Then it seems to adjust the height of the scroll bar logically (i.e.,
based on what's shown in the window, and not on the length of the
(truncated) text).

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