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use std::rc::Rc;
use cursive::event::{Callback, Event, EventResult, Key};
use cursive::traits::{Boxable, View};
use cursive::view::ViewWrapper;
use cursive::views::{BoxView, DummyView, LinearLayout, OnEventView, Panel, SelectView};
use cursive::Cursive;
use cursive::With;
use super::is_value_from_select;
use feeders::Feeder;
use views::Autocomplete;
type OnSelect = Option<Rc<Fn(&mut Cursive, Rc<String>)>>;
type OnDeselect = Option<Rc<Fn(&mut Cursive, Rc<String>)>>;
pub struct Multiselect {
view: LinearLayout,
select_anything: bool,
redundant_selection: bool,
selected_idx: u8,
options_idx: u8,
on_select: OnSelect,
on_deselect: OnDeselect,
}
impl Multiselect {
pub fn new<T: Feeder>(feeder: T) -> Self {
let separator_width = 1;
let layout = LinearLayout::horizontal()
.child(Panel::new(
Autocomplete::new(feeder)
.full_width(),
))
.child(DummyView.fixed_width(separator_width))
.child(Panel::new(
OnEventView::new(
SelectView::<String>::new()
.full_width(),
)
.on_pre_event_inner(Event::CtrlChar('p'), |s, _| {
s.get_inner_mut().select_up(1);
Some(EventResult::Consumed(None))
})
.on_pre_event_inner(Event::CtrlChar('n'), |s, _| {
s.get_inner_mut().select_down(1);
Some(EventResult::Consumed(None))
}),
));
Multiselect {
view: layout,
select_anything: false,
redundant_selection: false,
options_idx: 0,
selected_idx: 2,
on_select: None,
on_deselect: None,
}
}
fn get_options_view(&self) -> &Autocomplete {
let box_view = self
.view
.get_child(self.options_idx as usize)
.unwrap()
.as_any()
.downcast_ref::<Panel<BoxView<Autocomplete>>>()
.unwrap();
box_view.get_inner().get_inner()
}
fn get_selected_view(&self) -> &SelectView<String> {
let box_view = self
.view
.get_child(self.selected_idx as usize)
.unwrap()
.as_any()
.downcast_ref::<Panel<OnEventView<BoxView<SelectView<String>>>>>()
.unwrap();
box_view.get_inner().get_inner().get_inner()
}
fn get_selected_view_mut(&mut self) -> &mut SelectView<String> {
let box_view = self
.view
.get_child_mut(self.selected_idx as usize)
.unwrap()
.as_any_mut()
.downcast_mut::<Panel<OnEventView<BoxView<SelectView<String>>>>>()
.unwrap();
box_view.get_inner_mut().get_inner_mut().get_inner_mut()
}
fn select_item(&mut self) -> Rc<String> {
let selected_text = self.get_options_view().get_value();
self.get_selected_view_mut()
.add_item_str((&*selected_text).clone());
selected_text
}
pub fn get_selected_items(&self) -> Vec<&String> {
let select = self.get_selected_view();
let mut idx = 0;
let mut found = Vec::new();
while let Some((_, v)) = select.get_item(idx) {
found.push(v);
idx += 1;
}
found
}
pub fn select_items(&mut self, items: Vec<String>) {
let selected_view = self.get_selected_view_mut();
selected_view.add_all_str(items);
}
pub fn is_value_selected(&self, to_check: &str) -> bool {
let select = self.get_selected_view();
is_value_from_select(select, to_check)
}
fn try_select_item(&mut self) -> Option<Rc<String>> {
let typed_value = self.get_options_view().get_value();
let from_select = self.get_options_view().is_value_from_select(&*typed_value);
if (typed_value.len() > 0) & (self.select_anything | from_select) {
if !self.redundant_selection & self.is_value_selected(&*typed_value) {
None
} else {
Some(self.select_item())
}
} else {
None
}
}
fn deselect_item(&mut self) -> Option<Rc<String>> {
let selected_view = self.get_selected_view_mut();
if let Some(idx) = selected_view.selected_id() {
let item = selected_view.selection();
selected_view.remove_item(idx);
return item;
} else {
None
}
}
pub fn select_anything(mut self) -> Self {
self.select_anything = true;
self
}
pub fn redundant_selection(mut self) -> Self {
self.redundant_selection = true;
self
}
pub fn set_on_select<F>(&mut self, callback: F)
where
F: Fn(&mut Cursive, Rc<String>) + 'static,
{
self.on_select = Some(Rc::new(callback));
}
pub fn on_select<F>(self, callback: F) -> Self
where
F: Fn(&mut Cursive, Rc<String>) + 'static,
{
self.with(|v| v.set_on_select(callback))
}
pub fn set_on_deselect<F>(&mut self, callback: F)
where
F: Fn(&mut Cursive, Rc<String>) + 'static,
{
self.on_deselect = Some(Rc::new(callback));
}
pub fn on_deselect<F>(self, callback: F) -> Self
where
F: Fn(&mut Cursive, Rc<String>) + 'static,
{
self.with(|v| v.set_on_deselect(callback))
}
}
impl ViewWrapper for Multiselect {
wrap_impl!(self.view: LinearLayout);
fn wrap_on_event(&mut self, event: Event) -> EventResult {
match event {
Event::Key(Key::Enter) => {
self.with_view_mut(|v| v.on_event(event))
.unwrap_or(EventResult::Ignored);
let focused = self.view.get_focus_index();
if focused == self.options_idx as usize {
if let Some(v) = self.try_select_item() {
let cb = self.on_select.clone().map(|on_select| {
Callback::from_fn(move |c| {
on_select(c, v.clone());
})
});
return EventResult::Consumed(cb);
}
}
if focused == self.selected_idx as usize {
if let Some(deselected) = self.deselect_item() {
let cb = self.on_deselect.clone().map(|on_deselect| {
Callback::from_fn(move |c| {
on_deselect(c, deselected.clone());
})
});
return EventResult::Consumed(cb);
}
}
EventResult::Consumed(None)
}
_ => self
.with_view_mut(|v| v.on_event(event))
.unwrap_or(EventResult::Ignored),
}
}
}