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use iced::Element;
use crate::traits::{Focusable, Navigable, NavigationResult};
use super::{Message, Navigation};
impl<'a, TOption> Navigable<TOption> for Navigation<TOption>
where
TOption: Clone + Focusable + PartialEq + 'a,
Element<'a, Message<TOption>>: From<&'a TOption>,
{
fn move_next(&mut self) -> NavigationResult<TOption> {
if let Some(next) = self.options_after_active.clone().first_mut() {
self.options_before_active = vec![
self.options_before_active.clone(),
self.active_option.clone().map_or_else(Vec::new, |mut o| {
o.unfocus();
vec![o]
}),
]
.concat();
next.focus();
self.active_option = Some(next.clone());
self.options_after_active.remove(0);
NavigationResult::Moved(next.clone())
} else if let Some(first) = self
.options_before_active
.clone()
.first_mut()
.filter(|_| self.active_option.is_none())
{
self.options_after_active = self.options_before_active.split_at(1).1.to_vec();
self.options_before_active = Vec::new();
first.focus();
self.active_option = Some(first.clone());
NavigationResult::Moved(first.clone())
} else {
NavigationResult::LastOption
}
}
fn move_prev(&mut self) -> NavigationResult<TOption> {
if let Some(prev) = self.options_before_active.clone().last() {
self.options_after_active = vec![
self.active_option.clone().map_or(vec![], |mut o| {
o.unfocus();
vec![o]
}),
self.options_after_active.clone(),
]
.concat();
self.active_option = Some(prev.clone());
self.active_option.iter_mut().for_each(TOption::focus);
self.options_before_active = self
.options_before_active
.split_last()
.map(|split| split.1.to_vec())
.unwrap_or_else(Vec::new);
NavigationResult::Moved(prev.clone())
} else {
NavigationResult::LastOption
}
}
}
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