iced_runtime/
lib.rs

1//! A renderer-agnostic native GUI runtime.
2//!
3//! ![The native path of the Iced ecosystem](https://github.com/iced-rs/iced/blob/master/docs/graphs/native.png?raw=true)
4//!
5//! `iced_runtime` takes [`iced_core`] and builds a native runtime on top of it.
6//!
7//! [`iced_core`]: https://github.com/iced-rs/iced/tree/0.13/core
8#![doc(
9    html_logo_url = "https://raw.githubusercontent.com/iced-rs/iced/9ab6923e943f784985e9ef9ca28b10278297225d/docs/logo.svg"
10)]
11#![cfg_attr(docsrs, feature(doc_auto_cfg))]
12pub mod clipboard;
13pub mod font;
14pub mod keyboard;
15pub mod overlay;
16pub mod system;
17pub mod task;
18pub mod user_interface;
19pub mod window;
20
21pub use iced_core as core;
22pub use iced_debug as debug;
23pub use iced_futures as futures;
24
25pub use task::Task;
26pub use user_interface::UserInterface;
27
28use crate::core::widget;
29use crate::futures::futures::channel::oneshot;
30
31use std::borrow::Cow;
32use std::fmt;
33
34/// An action that the iced runtime can perform.
35pub enum Action<T> {
36    /// Output some value.
37    Output(T),
38
39    /// Load a font from its bytes.
40    LoadFont {
41        /// The bytes of the font to load.
42        bytes: Cow<'static, [u8]>,
43        /// The channel to send back the load result.
44        channel: oneshot::Sender<Result<(), font::Error>>,
45    },
46
47    /// Run a widget operation.
48    Widget(Box<dyn widget::Operation>),
49
50    /// Run a clipboard action.
51    Clipboard(clipboard::Action),
52
53    /// Run a window action.
54    Window(window::Action),
55
56    /// Run a system action.
57    System(system::Action),
58
59    /// Exits the runtime.
60    ///
61    /// This will normally close any application windows and
62    /// terminate the runtime loop.
63    Exit,
64}
65
66impl<T> Action<T> {
67    /// Creates a new [`Action::Widget`] with the given [`widget::Operation`].
68    pub fn widget(operation: impl widget::Operation + 'static) -> Self {
69        Self::Widget(Box::new(operation))
70    }
71
72    fn output<O>(self) -> Result<T, Action<O>> {
73        match self {
74            Action::Output(output) => Ok(output),
75            Action::LoadFont { bytes, channel } => {
76                Err(Action::LoadFont { bytes, channel })
77            }
78            Action::Widget(operation) => Err(Action::Widget(operation)),
79            Action::Clipboard(action) => Err(Action::Clipboard(action)),
80            Action::Window(action) => Err(Action::Window(action)),
81            Action::System(action) => Err(Action::System(action)),
82            Action::Exit => Err(Action::Exit),
83        }
84    }
85}
86
87impl<T> fmt::Debug for Action<T>
88where
89    T: fmt::Debug,
90{
91    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
92        match self {
93            Action::Output(output) => write!(f, "Action::Output({output:?})"),
94            Action::LoadFont { .. } => {
95                write!(f, "Action::LoadFont")
96            }
97            Action::Widget { .. } => {
98                write!(f, "Action::Widget")
99            }
100            Action::Clipboard(action) => {
101                write!(f, "Action::Clipboard({action:?})")
102            }
103            Action::Window(_) => write!(f, "Action::Window"),
104            Action::System(action) => write!(f, "Action::System({action:?})"),
105            Action::Exit => write!(f, "Action::Exit"),
106        }
107    }
108}
109
110/// Creates a [`Task`] that exits the iced runtime.
111///
112/// This will normally close any application windows and
113/// terminate the runtime loop.
114pub fn exit<T>() -> Task<T> {
115    task::effect(Action::Exit)
116}
iced_runtime/lib.rs

iced_runtime/
lib.rs
