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use std::collections::HashMap;
use ecs::extension::Collector as ExtensionCollector;
use ecs::sole::Single;
use ecs::Sole;
use crate::event::Start as StartEvent;
use crate::vector::Vec2;
use crate::window::{Key, KeyState, Window};
#[derive(Debug, Clone, Default, Sole)]
pub struct Keys
{
map: HashMap<Key, KeyState>,
}
impl Keys
{
#[must_use]
pub fn new() -> Self
{
Self::default()
}
#[must_use]
pub fn get_key_state(&self, key: Key) -> KeyState
{
self.map.get(&key).copied().unwrap_or(KeyState::Released)
}
pub fn set_key_state(&mut self, key: Key, key_state: KeyState)
{
if matches!(key_state, KeyState::Released) {
self.map.remove(&key);
return;
}
if matches!(key_state, KeyState::Repeat) {
return;
}
self.map.insert(key, key_state);
}
#[must_use]
pub fn is_anything_pressed(&self) -> bool
{
!self.map.is_empty()
}
}
#[derive(Debug, Clone, Default, Sole)]
pub struct Cursor
{
pub position: Vec2<f64>,
pub has_moved: bool,
}
impl Cursor
{
#[must_use]
pub fn new() -> Self
{
Self::default()
}
}
/// Input extension.
#[derive(Debug, Default)]
pub struct Extension {}
impl ecs::extension::Extension for Extension
{
fn collect(self, mut collector: ExtensionCollector<'_>)
{
collector.add_system(StartEvent, initialize);
collector.add_sole(Keys::default()).ok();
collector.add_sole(Cursor::default()).ok();
}
}
fn initialize(keys: Single<Keys>, cursor: Single<Cursor>, window: Single<Window>)
{
let keys_weak_ref = keys.to_weak_ref();
window.set_key_callback(move |key, _scancode, key_state, _modifiers| {
let keys_weak_ref = keys_weak_ref.clone();
let keys_ref = keys_weak_ref.access().expect("No world");
let mut keys = keys_ref.to_single();
keys.set_key_state(key, key_state);
});
let cursor_weak_ref = cursor.to_weak_ref();
window.set_cursor_pos_callback(move |cursor_position| {
let cursor_weak_ref = cursor_weak_ref.clone();
let cursor_ref = cursor_weak_ref.access().expect("No world");
let mut cursor = cursor_ref.to_single();
cursor.position = Vec2 {
x: cursor_position.x,
y: cursor_position.y,
};
cursor.has_moved = true;
});
}
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