1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use std::sync::Arc;

use dioxus_core::prelude::{
    consume_context,
    try_consume_context,
    use_hook,
};
use dioxus_signals::{
    Readable,
    Signal,
};
use freya_common::EventMessage;
use tokio::sync::{
    broadcast,
    mpsc::UnboundedSender,
};
use winit::{
    event_loop::EventLoopProxy,
    window::{
        CursorIcon,
        Fullscreen,
        Window,
    },
};

#[derive(Clone, Copy, PartialEq)]
pub struct UsePlatform {
    ticker: Signal<Arc<broadcast::Receiver<()>>>,
    event_loop_proxy: Signal<Option<EventLoopProxy<EventMessage>>>,
    platform_emitter: Signal<Option<UnboundedSender<EventMessage>>>,
}

#[derive(PartialEq, Eq, Debug)]
pub enum UsePlatformError {
    EventLoopProxyFailed,
    PlatformEmitterFailed,
}

impl UsePlatform {
    #[allow(clippy::new_without_default)]
    pub fn new() -> Self {
        UsePlatform {
            event_loop_proxy: Signal::new(try_consume_context::<EventLoopProxy<EventMessage>>()),
            platform_emitter: Signal::new(try_consume_context::<UnboundedSender<EventMessage>>()),
            ticker: Signal::new(consume_context::<Arc<broadcast::Receiver<()>>>()),
        }
    }

    pub fn send(&self, event: EventMessage) -> Result<(), UsePlatformError> {
        if let Some(event_loop_proxy) = &*self.event_loop_proxy.peek() {
            event_loop_proxy
                .send_event(event)
                .map_err(|_| UsePlatformError::EventLoopProxyFailed)?;
        } else if let Some(platform_emitter) = &*self.platform_emitter.peek() {
            platform_emitter
                .send(event)
                .map_err(|_| UsePlatformError::PlatformEmitterFailed)?;
        }
        Ok(())
    }

    pub fn set_cursor(&self, cursor_icon: CursorIcon) {
        self.send(EventMessage::SetCursorIcon(cursor_icon)).ok();
    }

    pub fn set_title(&self, title: impl Into<String>) {
        let title = title.into();
        self.with_window(move |window| {
            window.set_title(&title);
        });
    }

    pub fn with_window(&self, cb: impl FnOnce(&Window) + 'static + Send + Sync) {
        self.send(EventMessage::WithWindow(Box::new(cb))).ok();
    }

    pub fn drag_window(&self) {
        self.with_window(|window| {
            window.drag_window().ok();
        });
    }

    pub fn set_maximize_window(&self, maximize: bool) {
        self.with_window(move |window| {
            window.set_maximized(maximize);
        });
    }

    pub fn toggle_maximize_window(&self) {
        self.with_window(|window| {
            window.set_maximized(!window.is_maximized());
        });
    }

    pub fn set_minimize_window(&self, minimize: bool) {
        self.with_window(move |window| {
            window.set_minimized(minimize);
        });
    }

    pub fn toggle_minimize_window(&self) {
        self.with_window(|window| {
            window.set_minimized(window.is_minimized().map(|v| !v).unwrap_or_default());
        });
    }

    pub fn toggle_fullscreen_window(&self) {
        self.with_window(|window| match window.fullscreen() {
            Some(_) => window.set_fullscreen(None),
            None => window.set_fullscreen(Some(Fullscreen::Borderless(None))),
        });
    }

    pub fn set_fullscreen_window(&self, fullscreen: bool) {
        self.with_window(move |window| {
            if fullscreen {
                window.set_fullscreen(Some(Fullscreen::Borderless(None)))
            } else {
                window.set_fullscreen(None)
            }
        });
    }

    pub fn request_animation_frame(&self) {
        self.send(EventMessage::RequestRerender).ok();
    }

    pub fn new_ticker(&self) -> Ticker {
        Ticker {
            inner: self.ticker.peek().resubscribe(),
        }
    }

    /// Closes the whole app.
    pub fn exit(&self) {
        self.send(EventMessage::ExitApp).ok();
    }
}

/// Get access to information and features of the platform.
pub fn use_platform() -> UsePlatform {
    use_hook(UsePlatform::new)
}

pub struct Ticker {
    inner: broadcast::Receiver<()>,
}

impl Ticker {
    pub async fn tick(&mut self) {
        self.inner.recv().await.ok();
    }
}