raui_core/
messenger.rs

1//! Widget messaging
2
3use crate::widget::WidgetId;
4use intuicio_data::type_hash::TypeHash;
5use std::{any::Any, sync::mpsc::Sender};
6
7pub trait MessageData: std::fmt::Debug + Send + Sync {
8    fn clone_message(&self) -> Box<dyn MessageData>;
9    fn as_any(&self) -> &dyn Any;
10
11    fn type_hash(&self) -> TypeHash {
12        TypeHash::of::<Self>()
13    }
14}
15
16impl Clone for Box<dyn MessageData> {
17    fn clone(&self) -> Self {
18        self.clone_message()
19    }
20}
21
22pub type Message = Box<dyn MessageData>;
23pub type Messages = Vec<Message>;
24
25#[derive(Clone)]
26pub struct MessageSender(Sender<(WidgetId, Message)>);
27
28impl MessageSender {
29    pub fn new(sender: Sender<(WidgetId, Message)>) -> Self {
30        Self(sender)
31    }
32
33    pub fn write<T>(&self, id: WidgetId, message: T) -> bool
34    where
35        T: 'static + MessageData,
36    {
37        self.0.send((id, Box::new(message))).is_ok()
38    }
39
40    pub fn write_raw(&self, id: WidgetId, message: Message) -> bool {
41        self.0.send((id, message)).is_ok()
42    }
43
44    pub fn write_raw_all<I>(&self, messages: I)
45    where
46        I: IntoIterator<Item = (WidgetId, Message)>,
47    {
48        for data in messages {
49            let _ = self.0.send(data);
50        }
51    }
52}
53
54pub struct Messenger<'a> {
55    sender: MessageSender,
56    pub messages: &'a [Message],
57}
58
59impl<'a> Messenger<'a> {
60    pub fn new(sender: MessageSender, messages: &'a [Message]) -> Self {
61        Self { sender, messages }
62    }
63
64    pub fn write<T>(&self, id: WidgetId, message: T) -> bool
65    where
66        T: 'static + MessageData,
67    {
68        self.sender.write(id, message)
69    }
70
71    pub fn write_raw(&self, id: WidgetId, message: Message) -> bool {
72        self.sender.write_raw(id, message)
73    }
74
75    pub fn write_raw_all<I>(&self, messages: I)
76    where
77        I: IntoIterator<Item = (WidgetId, Message)>,
78    {
79        self.sender.write_raw_all(messages);
80    }
81}
82
83/// Macro for implementing [`MessageData`].
84///
85/// You may prefer to use the [derive macro][`macro@crate::MessageData`] instead, but in case of
86/// auto-implementing MessageData for remote or std types, this might be the macro you find useful.
87#[macro_export]
88macro_rules! implement_message_data {
89    ($type_name:ty) => {
90        impl $crate::messenger::MessageData for $type_name
91        where
92            Self: Clone,
93        {
94            fn clone_message(&self) -> Box<dyn $crate::messenger::MessageData> {
95                Box::new(self.clone())
96            }
97
98            fn as_any(&self) -> &dyn Any {
99                self
100            }
101        }
102    };
103}
104
105implement_message_data!(());
106implement_message_data!(i8);
107implement_message_data!(i16);
108implement_message_data!(i32);
109implement_message_data!(i64);
110implement_message_data!(i128);
111implement_message_data!(u8);
112implement_message_data!(u16);
113implement_message_data!(u32);
114implement_message_data!(u64);
115implement_message_data!(u128);
116implement_message_data!(f32);
117implement_message_data!(f64);
118implement_message_data!(bool);
119implement_message_data!(String);
raui_core/messenger.rs

raui_core/
messenger.rs
