bendns' repos / cargo-kewl
cargo hollywood
Diffstat (limited to 'src/ui/ls.rs')
-rw-r--r--src/ui/ls.rs38
1 files changed, 38 insertions, 0 deletions
diff --git a/src/ui/ls.rs b/src/ui/ls.rs
new file mode 100644
index 0000000..6181240
--- /dev/null
+++ b/src/ui/ls.rs
@@ -0,0 +1,38 @@
+use ratatui::widgets::ListState;
+
+#[derive(Default)]
+pub struct SList {
+ pub state: ListState,
+ pub itemc: usize,
+}
+
+pub const fn incr(what: usize, cap: usize) -> usize {
+ if what > cap - 1 {
+ 0
+ } else {
+ what + 1
+ }
+}
+
+pub const fn decr(what: usize, cap: usize) -> usize {
+ if what == 0 {
+ cap - 1
+ } else {
+ what - 1
+ }
+}
+
+impl SList {
+ pub fn next(&mut self) {
+ let i = self.state.selected().map_or(0, |x| incr(x, self.itemc));
+ self.state.select(Some(i));
+ }
+
+ pub fn prev(&mut self) {
+ let i = self.state.selected().map_or(0, |x| decr(x, self.itemc));
+ self.state.select(Some(i));
+ }
+ pub fn has(&mut self, n: usize) {
+ self.itemc = n;
+ }
+}