vim: Fix ctrl-u/ctrl-d

They should work by exactly half a screen, and also move the cursor.
2023-09-26 22:28:04 -06:00
parent 342a00b89e
commit 8e1bbf32be
5 changed files with 122 additions and 21 deletions
@@ -15,9 +15,13 @@ impl ScrollAmount {
            Self::Line(count) => *count,
            Self::Page(count) => editor
                .visible_line_count()
-                // subtract one to leave an anchor line
-                // round towards zero (so page-up and page-down are symmetric)
-                .map(|l| (l * count).trunc() - count.signum())
+                .map(|mut l| {
+                    // for full pages subtract one to leave an anchor line
+                    if count.abs() == 1.0 {
+                        l -= 1.0
+                    }
+                    (l * count).trunc()
+                })
                .unwrap_or(0.),
        }
    }