shithub: sam

Download patch

ref: 69d4e9e10a45517ad32d399bfbf61390d5a43208
parent: f22e9bf91474c356d6783293e05991013171a0bc
author: Aidan K. Wiggins <akw@oneiri.one>
date: Sat Mar 15 17:30:06 EDT 2025

Use Rio's scrollbar intervals.

Sam originally used the following scrollbar indexing:

————————————————
|[0]|
|[1]|
|[2]|
...

I changed it so that we could use the first line to scroll as well:

————————————————
|[1]|
|[2]|
|[3]|
...

Effectively meaning that we go up/down by n lines when we click the
nth line. But what we actually want is the arbitrary map:

————————————————
|[1]|
|[1]|
|[2]|
|[3]|
...

This is what Rio uses: attribute special meaning to the first line,
and otherwise *jump* to line clicked.

--- a/samterm/scroll.c

+++ b/samterm/scroll.c

@@ -160,10 +160,10 @@

 			p0 = 0;

 			o = (tot / (s.max.y - s.min.y)) * (my - s.min.y);

 		}else{

-			p0 = (but == 1 || but == 4)? -1: 1;

-			p0 *= (my - s.min.y)/l->f.font->height+1;

+			p0 = (my - s.min.y)/l->f.font->height;

+			p0 += p0 == 0;

+			p0 *= (but == 1 || but == 4)? -1: 1;

 			o = l->origin;

-

 		}

 		mouseunblock();

 		center(l, o, p0, 1);