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use std::collections::HashMap;
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use flume::{Receiver, Sender};
use crate::input::state::WindowState;
use crate::input::{proc, Hook, InputEvent, InputHookID};
use crate::interface::{BinID, Interface};
use crate::interval::Interval;
use crate::window::WindowID;
pub(in crate::input) enum LoopEvent {
Normal(InputEvent),
Add { id: InputHookID, hook: Hook },
FocusBin { win: WindowID, bin: Option<BinID> },
SmoothScroll { win: WindowID, v: f32, h: f32 },
Remove(InputHookID),
}
pub(in crate::input) fn begin_loop(
interface: Arc<Interface>,
interval: Arc<Interval>,
event_send: Sender<LoopEvent>,
event_recv: Receiver<LoopEvent>,
) {
thread::spawn(move || {
let mut hooks: HashMap<InputHookID, Hook> = HashMap::new();
let mut win_state: HashMap<WindowID, WindowState> = HashMap::new();
let (ss_send, ss_recv) = flume::unbounded();
struct SmoothScroll {
step: f32,
rem: [f32; 2],
amt: [f32; 2],
cycles: [u16; 2],
}
let mut ss_state: HashMap<WindowID, SmoothScroll> = HashMap::new();
const SS_CYCLES: u16 = 20;
// TODO: Configure frequency of output?
interval.start(interval.do_every(Duration::from_millis(8), None, move |_| {
while let Ok((win, v, h)) = ss_recv.try_recv() {
let state = ss_state.entry(win).or_insert_with(|| {
SmoothScroll {
step: 100.0,
rem: [0.0; 2],
amt: [0.0; 2],
cycles: [0; 2],
}
});
if v != 0.0 {
let accel = ((state.rem[0].abs() / state.step) / 1.5).clamp(1.0, 4.0);
state.rem[0] += v * state.step * accel;
state.amt[0] = state.rem[0];
state.cycles[0] = SS_CYCLES;
}
if h != 0.0 {
let accel = ((state.rem[1].abs() / state.step) / 1.5).clamp(1.0, 4.0);
state.rem[1] += h * state.step * accel;
state.amt[1] = state.rem[1];
state.cycles[1] = SS_CYCLES;
}
}
for (win, state) in ss_state.iter_mut() {
let v = if state.cycles[0] != 0 {
let amt =
state.amt[0] * ((state.cycles[0] as f32 - 0.5) / (SS_CYCLES as f32 * 10.0));
state.rem[0] -= amt;
state.cycles[0] -= 1;
if state.cycles[0] == 0 {
state.rem[0] = 0.0;
}
amt
} else {
0.0
};
let h = if state.cycles[1] != 0 {
let amt =
state.amt[1] * ((state.cycles[1] as f32 - 0.5) / (SS_CYCLES as f32 * 10.0));
state.rem[1] -= amt;
state.cycles[1] -= 1;
if state.cycles[1] == 0 {
state.rem[1] = 0.0;
}
amt
} else {
0.0
};
if v != 0.0 || h != 0.0 {
event_send
.send(LoopEvent::SmoothScroll {
win: *win,
v,
h,
})
.unwrap();
}
}
Default::default()
}));
while let Ok(event) = event_recv.recv() {
match event {
LoopEvent::Add {
id,
hook,
} => {
hooks.insert(id, hook);
},
LoopEvent::Remove(id) => {
hooks.remove(&id);
},
LoopEvent::FocusBin {
win,
bin,
} => {
let window_state = win_state
.entry(win)
.or_insert_with(|| WindowState::new(win));
if let Some((old_bin_id_op, new_bin_id_op)) = window_state.update_focus_bin(bin)
{
proc::bin_focus(
&interval,
&mut hooks,
window_state,
old_bin_id_op,
new_bin_id_op,
);
}
},
LoopEvent::SmoothScroll {
win,
v,
h,
} => {
proc::scroll(&interface, &mut hooks, &mut win_state, win, true, v, h);
},
LoopEvent::Normal(event) => {
match event {
InputEvent::Press {
win,
key,
} => {
proc::press(
&interface,
&interval,
&mut hooks,
&mut win_state,
win,
key,
);
},
InputEvent::Release {
win,
key,
} => {
proc::release(&interval, &mut hooks, &mut win_state, win, key);
},
InputEvent::Character {
win,
c,
} => {
proc::character(&mut hooks, &mut win_state, win, c);
},
InputEvent::Focus {
win,
} => {
proc::window_focus(&mut hooks, &mut win_state, win, true);
},
InputEvent::FocusLost {
win,
} => {
proc::window_focus(&mut hooks, &mut win_state, win, false);
},
InputEvent::Cursor {
win,
x,
y,
} => {
proc::cursor(&interface, &mut hooks, &mut win_state, win, x, y, false);
},
InputEvent::Scroll {
win,
v,
h,
} => {
ss_send.send((win, v, h)).unwrap();
proc::scroll(&interface, &mut hooks, &mut win_state, win, false, v, h);
},
InputEvent::Enter {
win,
} => {
proc::window_cursor_inside(&mut hooks, &mut win_state, win, true);
},
InputEvent::Leave {
win,
} => {
proc::window_cursor_inside(&mut hooks, &mut win_state, win, false);
},
InputEvent::Motion {
x,
y,
} => {
proc::motion(&mut hooks, x, y);
},
InputEvent::CursorCapture {
win,
captured,
} => {
let window_state = win_state
.entry(win)
.or_insert_with(|| WindowState::new(win));
if window_state.update_cursor_captured(captured) {
if captured {
if let Some((old_bin_id_op, ..)) =
window_state.update_focus_bin(None)
{
proc::bin_focus(
&interval,
&mut hooks,
window_state,
old_bin_id_op,
None,
);
}
}
let [x, y] = window_state.cursor_pos();
proc::cursor(
&interface,
&mut hooks,
&mut win_state,
win,
x,
y,
true,
);
}
},
}
},
}
}
});
}