bevy/crates/bevy_input/src/input.rs

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use bevy_utils::HashSet;
use std::hash::Hash;
/// A "press-able" input of type `T`
#[derive(Debug)]
pub struct Input<T> {
pressed: HashSet<T>,
just_pressed: HashSet<T>,
just_released: HashSet<T>,
}
impl<T> Default for Input<T> {
fn default() -> Self {
Self {
pressed: Default::default(),
just_pressed: Default::default(),
just_released: Default::default(),
}
}
}
impl<T> Input<T>
where
T: Copy + Eq + Hash,
{
pub fn press(&mut self, input: T) {
if !self.pressed(input) {
self.just_pressed.insert(input);
}
self.pressed.insert(input);
}
pub fn pressed(&self, input: T) -> bool {
self.pressed.contains(&input)
}
pub fn release(&mut self, input: T) {
self.pressed.remove(&input);
self.just_released.insert(input);
}
pub fn just_pressed(&self, input: T) -> bool {
self.just_pressed.contains(&input)
}
pub fn just_released(&self, input: T) -> bool {
self.just_released.contains(&input)
}
pub fn reset(&mut self, input: T) {
self.pressed.remove(&input);
self.just_pressed.remove(&input);
self.just_released.remove(&input);
}
pub fn update(&mut self) {
self.just_pressed.clear();
self.just_released.clear();
}
pub fn get_pressed(&self) -> impl ExactSizeIterator<Item = &T> {
self.pressed.iter()
}
pub fn get_just_pressed(&self) -> impl ExactSizeIterator<Item = &T> {
self.just_pressed.iter()
}
pub fn get_just_released(&self) -> impl ExactSizeIterator<Item = &T> {
self.just_released.iter()
}
}
#[cfg(test)]
mod test {
#[test]
fn input_test() {
use crate::Input;
/// Used for testing `Input` functionality
#[derive(Copy, Clone, Eq, PartialEq, Hash)]
enum DummyInput {
Input1,
Input2,
}
let mut input = Input::default();
// Test pressing
input.press(DummyInput::Input1);
input.press(DummyInput::Input2);
// Check if they were "just pressed" (pressed on this update)
assert!(input.just_pressed(DummyInput::Input1));
assert!(input.just_pressed(DummyInput::Input2));
// Check if they are also marked as pressed
assert!(input.pressed(DummyInput::Input1));
assert!(input.pressed(DummyInput::Input2));
// Update the `Input` and check press state
input.update();
// Check if they're marked "just pressed"
assert!(!input.just_pressed(DummyInput::Input1));
assert!(!input.just_pressed(DummyInput::Input2));
// Check if they're marked as pressed
assert!(input.pressed(DummyInput::Input1));
assert!(input.pressed(DummyInput::Input2));
// Release the inputs and check state
input.release(DummyInput::Input1);
input.release(DummyInput::Input2);
// Check if they're marked as "just released" (released on this update)
assert!(input.just_released(DummyInput::Input1));
assert!(input.just_released(DummyInput::Input2));
// Check that they're not incorrectly marked as pressed
assert!(!input.pressed(DummyInput::Input1));
assert!(!input.pressed(DummyInput::Input2));
// Update the `Input` and check for removal from `just_released`
input.update();
// Check that they're not incorrectly marked as just released
assert!(!input.just_released(DummyInput::Input1));
assert!(!input.just_released(DummyInput::Input2));
// Set up an `Input` to test resetting.
let mut input = Input::default();
input.press(DummyInput::Input1);
input.release(DummyInput::Input2);
// Reset the `Input` and test it was reset correctly.
input.reset(DummyInput::Input1);
input.reset(DummyInput::Input2);
assert!(!input.just_pressed(DummyInput::Input1));
assert!(!input.pressed(DummyInput::Input1));
assert!(!input.just_released(DummyInput::Input2));
}
}