Navigation::remove_options_where()

1 files changed, 29 insertions, 0 deletions

diff --git a/schist_desktop_gui/src/gui/components/navigation/navigation_remove_options.rs b/schist_desktop_gui/src/gui/components/navigation/navigation_remove_options.rs
new file mode 100644
index 0000000..6320c99
--- /dev/null
+++ b/schist_desktop_gui/src/gui/components/navigation/navigation_remove_options.rs
@@ -0,0 +1,29 @@
+use iced::Element;
+
+use super::{Message, Navigation};
+
+impl<'a, TOption> Navigation<TOption>
+where
+    TOption: Clone + PartialEq + 'a,
+    Element<'a, Message<TOption>>: From<&'a TOption>,
+{
+    pub fn remove_options_where<P>(&mut self, pred: P)
+    where
+        P: Fn(&TOption) -> bool,
+    {
+        while let Some(index) = self.options_before_active.iter().position(&pred) {
+            self.options_before_active.remove(index);
+        }
+
+        while let Some(index) = self.options_after_active.iter().position(&pred) {
+            self.options_after_active.remove(index);
+        }
+
+        if self.active_option.as_ref().is_some_and(pred) {
+            self.active_option = self
+                .options_before_active
+                .pop()
+                .or_else(|| self.options_after_active.splice(0..1, Vec::new()).last());
+        }
+    }
+}