list: reset, somewhat decent resize implementation and fix reframe

list::reframe had buggy behaviour (especially after previous commit).

list::reset allows easily resetting the list (cursor = 0, reset frame).

list::resize allows resizing the list after a sigwinch more easily. It's
a bit of a bitch to get a pretty, non-brutal (without cursor/frame
resetting to avoid "jumping" effect) list resize, this algo acheives it
somewhat decently and keeps the selected item in a somewhat predictable
position.

1 files changed, 7 insertions, 0 deletions

diff --git a/main.ha b/main.ha
index bff260e..51c9b8a 100644
--- a/main.ha
+++ b/main.ha
@@ -28,8 +28,15 @@ fn sighandler(sig: int, info: *signal::siginfo, ucontext: *void) void = {
 		} else {
 			yield len(u.list.items);
 		};
+		const oldsz = list::ttysize {
+			rows = u.list.sz.rows,
+			cols = u.list.sz.cols,
+		};
 		u.list.sz.rows = rows: u16;
 		u.list.sz.cols = sz.columns;
+		list::resize(u.list, oldsz);
+		libui::clear(u.list.widget.ui);
+		list::print(u.list)!;
 	};
 };