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bug#26445: 26.0.50; Scroll margin and cursor movement working incorrectl

From: Alexander Miller
Subject: bug#26445: 26.0.50; Scroll margin and cursor movement working incorrectly when scrolling over different height lines
Date: Fri, 14 Apr 2017 12:56:30 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

On 14/04/17 09:06, Eli Zaretskii wrote:
That depends on what font you have installed that's used to display
those characters.  It is best to have fonts of approximately the same
How would I go about finding out which fonts have which height and how to make emacs use them? Looking up font size and height just turns up a bunch of pages
about css. For emacs I found I could do something like
(set-fontset-font "fontset-default" nil (font-spec :size 1 :name "Symbola"))
but that doesn't seem to do anything.
There's no need to get rid of margins, as I think the problem you
describe is purely aesthetic, and quite expected when you have lines
of different height.  Why does it bother you so much?
I just don't like the inconsistency. The scroll stutter happens when I'm quickly
scrolling through a buffer and suddenly see my cursor change position for
seemingly no reason. To me it just plain looks like something that is not supposed to happen. I certainly wouldn't have bothered with the bug report if there was a clear and visibly text height difference, but the issue already appears when the height
difference cannot be seen with the naked eye.

Btw, , , and  are private-use area (PUA) characters, so I'm not
sure what you expected from Emacs to do with them.
I've picked those up from Font Awesome, which brings us back to my previous question. Is it possible to tell emacs that Font Awesome Icons should have the same size as
my default text font, and if yes how do I do it?

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