1602 lines
59 KiB
Rust
1602 lines
59 KiB
Rust
//! Create interactive, native cross-platform applications for WGPU.
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mod state;
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mod window_manager;
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pub use state::State;
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use crate::conversion;
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use crate::core;
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use crate::core::mouse;
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use crate::core::renderer;
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use crate::core::theme;
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use crate::core::time::Instant;
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use crate::core::widget::operation;
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use crate::core::window;
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use crate::core::{Element, Point, Size};
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use crate::futures::futures::channel::mpsc;
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use crate::futures::futures::channel::oneshot;
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use crate::futures::futures::task;
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use crate::futures::futures::{Future, StreamExt};
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use crate::futures::subscription::{self, Subscription};
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use crate::futures::{Executor, Runtime};
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use crate::graphics;
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use crate::graphics::{compositor, Compositor};
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use crate::runtime::user_interface::{self, UserInterface};
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use crate::runtime::Debug;
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use crate::runtime::{self, Action, Task};
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use crate::{Clipboard, Error, Proxy, Settings};
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use window_manager::WindowManager;
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use rustc_hash::FxHashMap;
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use std::borrow::Cow;
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use std::mem::ManuallyDrop;
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use std::sync::Arc;
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/// An interactive, native, cross-platform, multi-windowed application.
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///
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/// This trait is the main entrypoint of multi-window Iced. Once implemented, you can run
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/// your GUI application by simply calling [`run`]. It will run in
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/// its own window.
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///
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/// A [`Program`] can execute asynchronous actions by returning a
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/// [`Task`] in some of its methods.
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///
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/// When using a [`Program`] with the `debug` feature enabled, a debug view
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/// can be toggled by pressing `F12`.
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pub trait Program
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where
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Self: Sized,
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Self::Theme: theme::Base,
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{
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/// The type of __messages__ your [`Program`] will produce.
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type Message: std::fmt::Debug + Send;
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/// The theme used to draw the [`Program`].
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type Theme;
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/// The [`Executor`] that will run commands and subscriptions.
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///
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/// The [default executor] can be a good starting point!
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///
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/// [`Executor`]: Self::Executor
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/// [default executor]: crate::futures::backend::default::Executor
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type Executor: Executor;
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/// The graphics backend to use to draw the [`Program`].
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type Renderer: core::Renderer + core::text::Renderer;
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/// The data needed to initialize your [`Program`].
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type Flags;
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/// Initializes the [`Program`] with the flags provided to
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/// [`run`] as part of the [`Settings`].
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///
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/// Here is where you should return the initial state of your app.
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///
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/// Additionally, you can return a [`Task`] if you need to perform some
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/// async action in the background on startup. This is useful if you want to
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/// load state from a file, perform an initial HTTP request, etc.
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fn new(flags: Self::Flags) -> (Self, Task<Self::Message>);
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/// Returns the current title of the [`Program`].
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///
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/// This title can be dynamic! The runtime will automatically update the
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/// title of your application when necessary.
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fn title(&self, window: window::Id) -> String;
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/// Handles a __message__ and updates the state of the [`Program`].
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///
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/// This is where you define your __update logic__. All the __messages__,
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/// produced by either user interactions or commands, will be handled by
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/// this method.
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///
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/// Any [`Task`] returned will be executed immediately in the background by the
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/// runtime.
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fn update(&mut self, message: Self::Message) -> Task<Self::Message>;
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/// Returns the widgets to display in the [`Program`] for the `window`.
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///
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/// These widgets can produce __messages__ based on user interaction.
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fn view(
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&self,
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window: window::Id,
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) -> Element<'_, Self::Message, Self::Theme, Self::Renderer>;
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/// Returns the current `Theme` of the [`Program`].
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fn theme(&self, window: window::Id) -> Self::Theme;
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/// Returns the `Style` variation of the `Theme`.
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fn style(&self, theme: &Self::Theme) -> theme::Style {
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theme::Base::base(theme)
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}
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/// Returns the event `Subscription` for the current state of the
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/// application.
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///
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/// The messages produced by the `Subscription` will be handled by
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/// [`update`](#tymethod.update).
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///
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/// A `Subscription` will be kept alive as long as you keep returning it!
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///
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/// By default, it returns an empty subscription.
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fn subscription(&self) -> Subscription<Self::Message> {
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Subscription::none()
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}
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/// Returns the scale factor of the window of the [`Program`].
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///
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/// It can be used to dynamically control the size of the UI at runtime
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/// (i.e. zooming).
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///
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/// For instance, a scale factor of `2.0` will make widgets twice as big,
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/// while a scale factor of `0.5` will shrink them to half their size.
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///
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/// By default, it returns `1.0`.
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#[allow(unused_variables)]
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fn scale_factor(&self, window: window::Id) -> f64 {
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1.0
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}
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}
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/// Runs a [`Program`] with an executor, compositor, and the provided
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/// settings.
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pub fn run<P, C>(
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settings: Settings,
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graphics_settings: graphics::Settings,
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window_settings: Option<window::Settings>,
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flags: P::Flags,
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) -> Result<(), Error>
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where
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P: Program + 'static,
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C: Compositor<Renderer = P::Renderer> + 'static,
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P::Theme: theme::Base,
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{
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use winit::event_loop::EventLoop;
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let mut debug = Debug::new();
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debug.startup_started();
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let event_loop = EventLoop::with_user_event()
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.build()
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.expect("Create event loop");
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let (proxy, worker) = Proxy::new(event_loop.create_proxy());
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let mut runtime = {
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let executor =
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P::Executor::new().map_err(Error::ExecutorCreationFailed)?;
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executor.spawn(worker);
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Runtime::new(executor, proxy.clone())
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};
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let (program, task) = runtime.enter(|| P::new(flags));
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let is_daemon = window_settings.is_none();
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let task = if let Some(window_settings) = window_settings {
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let mut task = Some(task);
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let (_id, open) = runtime::window::open(window_settings);
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open.then(move |_| task.take().unwrap_or(Task::none()))
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} else {
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task
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};
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if let Some(stream) = runtime::task::into_stream(task) {
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runtime.run(stream);
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}
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runtime.track(subscription::into_recipes(
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runtime.enter(|| program.subscription().map(Action::Output)),
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));
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let (event_sender, event_receiver) = mpsc::unbounded();
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let (control_sender, control_receiver) = mpsc::unbounded();
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let instance = Box::pin(run_instance::<P, C>(
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program,
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runtime,
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proxy.clone(),
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debug,
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event_receiver,
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control_sender,
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is_daemon,
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graphics_settings,
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settings.fonts,
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));
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let context = task::Context::from_waker(task::noop_waker_ref());
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struct Runner<Message: 'static, F> {
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instance: std::pin::Pin<Box<F>>,
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context: task::Context<'static>,
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id: Option<String>,
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sender: mpsc::UnboundedSender<Event<Action<Message>>>,
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receiver: mpsc::UnboundedReceiver<Control>,
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error: Option<Error>,
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#[cfg(target_arch = "wasm32")]
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canvas: Option<web_sys::HtmlCanvasElement>,
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}
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let runner = Runner {
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instance,
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context,
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id: settings.id,
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sender: event_sender,
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receiver: control_receiver,
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error: None,
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#[cfg(target_arch = "wasm32")]
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canvas: None,
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};
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impl<Message, F> winit::application::ApplicationHandler<Action<Message>>
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for Runner<Message, F>
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where
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Message: std::fmt::Debug,
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F: Future<Output = ()>,
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{
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fn resumed(
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&mut self,
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_event_loop: &winit::event_loop::ActiveEventLoop,
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) {
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}
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fn new_events(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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cause: winit::event::StartCause,
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) {
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(winit::event::Event::NewEvents(cause)),
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);
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}
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fn window_event(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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window_id: winit::window::WindowId,
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event: winit::event::WindowEvent,
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) {
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#[cfg(target_os = "windows")]
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let is_move_or_resize = matches!(
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event,
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winit::event::WindowEvent::Resized(_)
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| winit::event::WindowEvent::Moved(_)
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);
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(winit::event::Event::WindowEvent {
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window_id,
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event,
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}),
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);
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// TODO: Remove when unnecessary
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// On Windows, we emulate an `AboutToWait` event after every `Resized` event
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// since the event loop does not resume during resize interaction.
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// More details: https://github.com/rust-windowing/winit/issues/3272
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#[cfg(target_os = "windows")]
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{
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if is_move_or_resize {
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(
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winit::event::Event::AboutToWait,
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),
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);
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}
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}
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}
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fn user_event(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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action: Action<Message>,
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) {
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(winit::event::Event::UserEvent(
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action,
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)),
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);
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}
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fn received_url(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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url: String,
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) {
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(
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winit::event::Event::PlatformSpecific(
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winit::event::PlatformSpecific::MacOS(
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winit::event::MacOS::ReceivedUrl(url),
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),
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),
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),
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);
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}
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fn about_to_wait(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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) {
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self.process_event(
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event_loop,
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Event::EventLoopAwakened(winit::event::Event::AboutToWait),
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);
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}
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}
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impl<Message, F> Runner<Message, F>
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where
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F: Future<Output = ()>,
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{
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fn process_event(
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&mut self,
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event_loop: &winit::event_loop::ActiveEventLoop,
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event: Event<Action<Message>>,
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) {
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if event_loop.exiting() {
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return;
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}
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self.sender.start_send(event).expect("Send event");
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loop {
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let poll = self.instance.as_mut().poll(&mut self.context);
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match poll {
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task::Poll::Pending => match self.receiver.try_next() {
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Ok(Some(control)) => match control {
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Control::ChangeFlow(flow) => {
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use winit::event_loop::ControlFlow;
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match (event_loop.control_flow(), flow) {
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(
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ControlFlow::WaitUntil(current),
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ControlFlow::WaitUntil(new),
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) if new < current => {}
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(
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ControlFlow::WaitUntil(target),
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ControlFlow::Wait,
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) if target > Instant::now() => {}
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_ => {
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event_loop.set_control_flow(flow);
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}
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}
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}
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Control::CreateWindow {
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id,
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settings,
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title,
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monitor,
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on_open,
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} => {
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let exit_on_close_request =
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settings.exit_on_close_request;
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let visible = settings.visible;
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#[cfg(target_arch = "wasm32")]
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let target =
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settings.platform_specific.target.clone();
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let window_attributes =
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conversion::window_attributes(
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settings,
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&title,
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monitor
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.or(event_loop.primary_monitor()),
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self.id.clone(),
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)
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.with_visible(false);
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#[cfg(target_arch = "wasm32")]
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let window_attributes = {
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use winit::platform::web::WindowAttributesExtWebSys;
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window_attributes
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.with_canvas(self.canvas.take())
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};
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log::info!("Window attributes for id `{id:#?}`: {window_attributes:#?}");
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// On macOS, the `position` in `WindowAttributes` represents the "inner"
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// position of the window; while on other platforms it's the "outer" position.
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// We fix the inconsistency on macOS by positioning the window after creation.
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#[cfg(target_os = "macos")]
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let mut window_attributes = window_attributes;
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#[cfg(target_os = "macos")]
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let position =
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window_attributes.position.take();
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let window = event_loop
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.create_window(window_attributes)
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.expect("Create window");
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#[cfg(target_os = "macos")]
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if let Some(position) = position {
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window.set_outer_position(position);
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}
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#[cfg(target_arch = "wasm32")]
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{
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use winit::platform::web::WindowExtWebSys;
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let canvas = window
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.canvas()
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.expect("Get window canvas");
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let _ = canvas.set_attribute(
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"style",
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"display: block; width: 100%; height: 100%",
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);
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let window = web_sys::window().unwrap();
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let document = window.document().unwrap();
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let body = document.body().unwrap();
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let target = target.and_then(|target| {
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body.query_selector(&format!(
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"#{target}"
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))
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.ok()
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.unwrap_or(None)
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});
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|
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match target {
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Some(node) => {
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let _ = node
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.replace_with_with_node_1(
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&canvas,
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)
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.expect(&format!(
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"Could not replace #{}",
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node.id()
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));
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}
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None => {
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let _ = body
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.append_child(&canvas)
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.expect(
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"Append canvas to HTML body",
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);
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}
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};
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}
|
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|
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self.process_event(
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event_loop,
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Event::WindowCreated {
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id,
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window: Arc::new(window),
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exit_on_close_request,
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make_visible: visible,
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on_open,
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},
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);
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}
|
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Control::Exit => {
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event_loop.exit();
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}
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Control::Crash(error) => {
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self.error = Some(error);
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event_loop.exit();
|
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}
|
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},
|
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_ => {
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break;
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}
|
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},
|
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task::Poll::Ready(_) => {
|
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event_loop.exit();
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break;
|
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}
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
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{
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let mut runner = runner;
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let _ = event_loop.run_app(&mut runner);
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|
|
runner.error.map(Err).unwrap_or(Ok(()))
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}
|
|
|
|
#[cfg(target_arch = "wasm32")]
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{
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use winit::platform::web::EventLoopExtWebSys;
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|
let _ = event_loop.spawn_app(runner);
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|
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Ok(())
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|
}
|
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}
|
|
|
|
#[derive(Debug)]
|
|
enum Event<Message: 'static> {
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|
WindowCreated {
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id: window::Id,
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window: Arc<winit::window::Window>,
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exit_on_close_request: bool,
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|
make_visible: bool,
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on_open: oneshot::Sender<window::Id>,
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},
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EventLoopAwakened(winit::event::Event<Message>),
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}
|
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|
|
#[derive(Debug)]
|
|
enum Control {
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ChangeFlow(winit::event_loop::ControlFlow),
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Exit,
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Crash(Error),
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CreateWindow {
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id: window::Id,
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settings: window::Settings,
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title: String,
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monitor: Option<winit::monitor::MonitorHandle>,
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on_open: oneshot::Sender<window::Id>,
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},
|
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}
|
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|
|
async fn run_instance<P, C>(
|
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mut program: P,
|
|
mut runtime: Runtime<P::Executor, Proxy<P::Message>, Action<P::Message>>,
|
|
mut proxy: Proxy<P::Message>,
|
|
mut debug: Debug,
|
|
mut event_receiver: mpsc::UnboundedReceiver<Event<Action<P::Message>>>,
|
|
mut control_sender: mpsc::UnboundedSender<Control>,
|
|
is_daemon: bool,
|
|
graphics_settings: graphics::Settings,
|
|
default_fonts: Vec<Cow<'static, [u8]>>,
|
|
) where
|
|
P: Program + 'static,
|
|
C: Compositor<Renderer = P::Renderer> + 'static,
|
|
P::Theme: theme::Base,
|
|
{
|
|
use winit::event;
|
|
use winit::event_loop::ControlFlow;
|
|
|
|
let mut window_manager = WindowManager::new();
|
|
let mut is_window_opening = !is_daemon;
|
|
|
|
let mut compositor = None;
|
|
let mut events = Vec::new();
|
|
let mut messages = Vec::new();
|
|
let mut actions = 0;
|
|
|
|
let mut ui_caches = FxHashMap::default();
|
|
let mut user_interfaces = ManuallyDrop::new(FxHashMap::default());
|
|
let mut clipboard = Clipboard::unconnected();
|
|
let mut compositor_receiver: Option<oneshot::Receiver<_>> = None;
|
|
|
|
debug.startup_finished();
|
|
|
|
loop {
|
|
let event = if compositor_receiver.is_some() {
|
|
let compositor_receiver =
|
|
compositor_receiver.take().expect("Waiting for compositor");
|
|
|
|
match compositor_receiver.await {
|
|
Ok(Ok((new_compositor, event))) => {
|
|
compositor = Some(new_compositor);
|
|
|
|
Some(event)
|
|
}
|
|
Ok(Err(error)) => {
|
|
control_sender
|
|
.start_send(Control::Crash(
|
|
Error::GraphicsCreationFailed(error),
|
|
))
|
|
.expect("Send control action");
|
|
break;
|
|
}
|
|
Err(error) => {
|
|
panic!("Compositor initialization failed: {error}")
|
|
}
|
|
}
|
|
// Empty the queue if possible
|
|
} else if let Ok(event) = event_receiver.try_next() {
|
|
event
|
|
} else {
|
|
event_receiver.next().await
|
|
};
|
|
|
|
let Some(event) = event else {
|
|
break;
|
|
};
|
|
|
|
match event {
|
|
Event::WindowCreated {
|
|
id,
|
|
window,
|
|
exit_on_close_request,
|
|
make_visible,
|
|
on_open,
|
|
} => {
|
|
if compositor.is_none() {
|
|
let (compositor_sender, new_compositor_receiver) =
|
|
oneshot::channel();
|
|
|
|
compositor_receiver = Some(new_compositor_receiver);
|
|
|
|
let create_compositor = {
|
|
let default_fonts = default_fonts.clone();
|
|
|
|
async move {
|
|
let mut compositor =
|
|
C::new(graphics_settings, window.clone()).await;
|
|
|
|
if let Ok(compositor) = &mut compositor {
|
|
for font in default_fonts {
|
|
compositor.load_font(font.clone());
|
|
}
|
|
}
|
|
|
|
compositor_sender
|
|
.send(compositor.map(|compositor| {
|
|
(
|
|
compositor,
|
|
Event::WindowCreated {
|
|
id,
|
|
window,
|
|
exit_on_close_request,
|
|
make_visible,
|
|
on_open,
|
|
},
|
|
)
|
|
}))
|
|
.ok()
|
|
.expect("Send compositor");
|
|
}
|
|
};
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
crate::futures::futures::executor::block_on(
|
|
create_compositor,
|
|
);
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
{
|
|
wasm_bindgen_futures::spawn_local(create_compositor);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
let window = window_manager.insert(
|
|
id,
|
|
window,
|
|
&program,
|
|
compositor
|
|
.as_mut()
|
|
.expect("Compositor must be initialized"),
|
|
exit_on_close_request,
|
|
);
|
|
|
|
let logical_size = window.state.logical_size();
|
|
|
|
let _ = user_interfaces.insert(
|
|
id,
|
|
build_user_interface(
|
|
&program,
|
|
user_interface::Cache::default(),
|
|
&mut window.renderer,
|
|
logical_size,
|
|
&mut debug,
|
|
id,
|
|
),
|
|
);
|
|
let _ = ui_caches.insert(id, user_interface::Cache::default());
|
|
|
|
if make_visible {
|
|
window.raw.set_visible(true);
|
|
}
|
|
|
|
events.push((
|
|
id,
|
|
core::Event::Window(window::Event::Opened {
|
|
position: window.position(),
|
|
size: window.size(),
|
|
}),
|
|
));
|
|
|
|
if clipboard.window_id().is_none() {
|
|
clipboard = Clipboard::connect(window.raw.clone());
|
|
}
|
|
|
|
let _ = on_open.send(id);
|
|
is_window_opening = false;
|
|
}
|
|
Event::EventLoopAwakened(event) => {
|
|
match event {
|
|
event::Event::NewEvents(event::StartCause::Init) => {
|
|
for (_id, window) in window_manager.iter_mut() {
|
|
window.raw.request_redraw();
|
|
}
|
|
}
|
|
event::Event::NewEvents(
|
|
event::StartCause::ResumeTimeReached { .. },
|
|
) => {
|
|
let now = Instant::now();
|
|
|
|
for (_id, window) in window_manager.iter_mut() {
|
|
if let Some(redraw_at) = window.redraw_at {
|
|
if redraw_at <= now {
|
|
window.raw.request_redraw();
|
|
window.redraw_at = None;
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Some(redraw_at) = window_manager.redraw_at() {
|
|
let _ =
|
|
control_sender.start_send(Control::ChangeFlow(
|
|
ControlFlow::WaitUntil(redraw_at),
|
|
));
|
|
} else {
|
|
let _ = control_sender.start_send(
|
|
Control::ChangeFlow(ControlFlow::Wait),
|
|
);
|
|
}
|
|
}
|
|
event::Event::PlatformSpecific(
|
|
event::PlatformSpecific::MacOS(
|
|
event::MacOS::ReceivedUrl(url),
|
|
),
|
|
) => {
|
|
runtime.broadcast(
|
|
subscription::Event::PlatformSpecific(
|
|
subscription::PlatformSpecific::MacOS(
|
|
subscription::MacOS::ReceivedUrl(url),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
event::Event::UserEvent(action) => {
|
|
run_action(
|
|
action,
|
|
&program,
|
|
&mut compositor,
|
|
&mut events,
|
|
&mut messages,
|
|
&mut clipboard,
|
|
&mut control_sender,
|
|
&mut debug,
|
|
&mut user_interfaces,
|
|
&mut window_manager,
|
|
&mut ui_caches,
|
|
&mut is_window_opening,
|
|
);
|
|
actions += 1;
|
|
}
|
|
event::Event::WindowEvent {
|
|
window_id: id,
|
|
event: event::WindowEvent::RedrawRequested,
|
|
..
|
|
} => {
|
|
let Some(compositor) = &mut compositor else {
|
|
continue;
|
|
};
|
|
|
|
let Some((id, window)) =
|
|
window_manager.get_mut_alias(id)
|
|
else {
|
|
continue;
|
|
};
|
|
|
|
let physical_size = window.state.physical_size();
|
|
|
|
if physical_size.width == 0 || physical_size.height == 0
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if window.viewport_version
|
|
!= window.state.viewport_version()
|
|
{
|
|
let logical_size = window.state.logical_size();
|
|
|
|
debug.layout_started();
|
|
let ui = user_interfaces
|
|
.remove(&id)
|
|
.expect("Remove user interface");
|
|
|
|
let _ = user_interfaces.insert(
|
|
id,
|
|
ui.relayout(logical_size, &mut window.renderer),
|
|
);
|
|
debug.layout_finished();
|
|
|
|
compositor.configure_surface(
|
|
&mut window.surface,
|
|
physical_size.width,
|
|
physical_size.height,
|
|
);
|
|
|
|
window.viewport_version =
|
|
window.state.viewport_version();
|
|
}
|
|
|
|
let redraw_event = core::Event::Window(
|
|
window::Event::RedrawRequested(Instant::now()),
|
|
);
|
|
|
|
let cursor = window.state.cursor();
|
|
|
|
let ui = user_interfaces
|
|
.get_mut(&id)
|
|
.expect("Get user interface");
|
|
|
|
let (ui_state, _) = ui.update(
|
|
&[redraw_event.clone()],
|
|
cursor,
|
|
&mut window.renderer,
|
|
&mut clipboard,
|
|
&mut messages,
|
|
);
|
|
|
|
debug.draw_started();
|
|
let new_mouse_interaction = ui.draw(
|
|
&mut window.renderer,
|
|
window.state.theme(),
|
|
&renderer::Style {
|
|
text_color: window.state.text_color(),
|
|
},
|
|
cursor,
|
|
);
|
|
debug.draw_finished();
|
|
|
|
if new_mouse_interaction != window.mouse_interaction {
|
|
window.raw.set_cursor(
|
|
conversion::mouse_interaction(
|
|
new_mouse_interaction,
|
|
),
|
|
);
|
|
|
|
window.mouse_interaction = new_mouse_interaction;
|
|
}
|
|
|
|
runtime.broadcast(subscription::Event::Interaction {
|
|
window: id,
|
|
event: redraw_event,
|
|
status: core::event::Status::Ignored,
|
|
});
|
|
|
|
if let user_interface::State::Updated {
|
|
redraw_request,
|
|
input_method,
|
|
} = ui_state
|
|
{
|
|
window.request_redraw(redraw_request);
|
|
window.request_input_method(input_method);
|
|
}
|
|
|
|
window.draw_preedit();
|
|
|
|
debug.render_started();
|
|
match compositor.present(
|
|
&mut window.renderer,
|
|
&mut window.surface,
|
|
window.state.viewport(),
|
|
window.state.background_color(),
|
|
&debug.overlay(),
|
|
) {
|
|
Ok(()) => {
|
|
debug.render_finished();
|
|
}
|
|
Err(error) => match error {
|
|
// This is an unrecoverable error.
|
|
compositor::SurfaceError::OutOfMemory => {
|
|
panic!("{:?}", error);
|
|
}
|
|
_ => {
|
|
debug.render_finished();
|
|
|
|
log::error!(
|
|
"Error {error:?} when \
|
|
presenting surface."
|
|
);
|
|
|
|
// Try rendering all windows again next frame.
|
|
for (_id, window) in
|
|
window_manager.iter_mut()
|
|
{
|
|
window.raw.request_redraw();
|
|
}
|
|
}
|
|
},
|
|
}
|
|
}
|
|
event::Event::WindowEvent {
|
|
event: window_event,
|
|
window_id,
|
|
} => {
|
|
if !is_daemon
|
|
&& matches!(
|
|
window_event,
|
|
winit::event::WindowEvent::Destroyed
|
|
)
|
|
&& !is_window_opening
|
|
&& window_manager.is_empty()
|
|
{
|
|
control_sender
|
|
.start_send(Control::Exit)
|
|
.expect("Send control action");
|
|
|
|
continue;
|
|
}
|
|
|
|
let Some((id, window)) =
|
|
window_manager.get_mut_alias(window_id)
|
|
else {
|
|
continue;
|
|
};
|
|
|
|
if matches!(
|
|
window_event,
|
|
winit::event::WindowEvent::Resized(_)
|
|
) {
|
|
window.raw.request_redraw();
|
|
}
|
|
|
|
if matches!(
|
|
window_event,
|
|
winit::event::WindowEvent::CloseRequested
|
|
) && window.exit_on_close_request
|
|
{
|
|
run_action(
|
|
Action::Window(runtime::window::Action::Close(
|
|
id,
|
|
)),
|
|
&program,
|
|
&mut compositor,
|
|
&mut events,
|
|
&mut messages,
|
|
&mut clipboard,
|
|
&mut control_sender,
|
|
&mut debug,
|
|
&mut user_interfaces,
|
|
&mut window_manager,
|
|
&mut ui_caches,
|
|
&mut is_window_opening,
|
|
);
|
|
} else {
|
|
window.state.update(
|
|
&window.raw,
|
|
&window_event,
|
|
&mut debug,
|
|
);
|
|
|
|
if let Some(event) = conversion::window_event(
|
|
window_event,
|
|
window.state.scale_factor(),
|
|
window.state.modifiers(),
|
|
) {
|
|
events.push((id, event));
|
|
}
|
|
}
|
|
}
|
|
event::Event::AboutToWait => {
|
|
if events.is_empty()
|
|
&& messages.is_empty()
|
|
&& window_manager.is_idle()
|
|
{
|
|
continue;
|
|
}
|
|
|
|
debug.event_processing_started();
|
|
let mut uis_stale = false;
|
|
|
|
for (id, window) in window_manager.iter_mut() {
|
|
let mut window_events = vec![];
|
|
|
|
events.retain(|(window_id, event)| {
|
|
if *window_id == id {
|
|
window_events.push(event.clone());
|
|
false
|
|
} else {
|
|
true
|
|
}
|
|
});
|
|
|
|
if window_events.is_empty() && messages.is_empty() {
|
|
continue;
|
|
}
|
|
|
|
let (ui_state, statuses) = user_interfaces
|
|
.get_mut(&id)
|
|
.expect("Get user interface")
|
|
.update(
|
|
&window_events,
|
|
window.state.cursor(),
|
|
&mut window.renderer,
|
|
&mut clipboard,
|
|
&mut messages,
|
|
);
|
|
|
|
#[cfg(feature = "unconditional-rendering")]
|
|
window.request_redraw(
|
|
window::RedrawRequest::NextFrame,
|
|
);
|
|
|
|
match ui_state {
|
|
user_interface::State::Updated {
|
|
redraw_request: _redraw_request,
|
|
..
|
|
} => {
|
|
#[cfg(not(
|
|
feature = "unconditional-rendering"
|
|
))]
|
|
window.request_redraw(_redraw_request);
|
|
}
|
|
user_interface::State::Outdated => {
|
|
uis_stale = true;
|
|
}
|
|
}
|
|
|
|
for (event, status) in window_events
|
|
.into_iter()
|
|
.zip(statuses.into_iter())
|
|
{
|
|
runtime.broadcast(
|
|
subscription::Event::Interaction {
|
|
window: id,
|
|
event,
|
|
status,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
|
|
for (id, event) in events.drain(..) {
|
|
runtime.broadcast(
|
|
subscription::Event::Interaction {
|
|
window: id,
|
|
event,
|
|
status: core::event::Status::Ignored,
|
|
},
|
|
);
|
|
}
|
|
|
|
debug.event_processing_finished();
|
|
|
|
if !messages.is_empty() || uis_stale {
|
|
let cached_interfaces: FxHashMap<
|
|
window::Id,
|
|
user_interface::Cache,
|
|
> = ManuallyDrop::into_inner(user_interfaces)
|
|
.drain()
|
|
.map(|(id, ui)| (id, ui.into_cache()))
|
|
.collect();
|
|
|
|
update(
|
|
&mut program,
|
|
&mut runtime,
|
|
&mut debug,
|
|
&mut messages,
|
|
);
|
|
|
|
for (id, window) in window_manager.iter_mut() {
|
|
window.state.synchronize(
|
|
&program,
|
|
id,
|
|
&window.raw,
|
|
);
|
|
|
|
window.raw.request_redraw();
|
|
}
|
|
|
|
user_interfaces =
|
|
ManuallyDrop::new(build_user_interfaces(
|
|
&program,
|
|
&mut debug,
|
|
&mut window_manager,
|
|
cached_interfaces,
|
|
));
|
|
|
|
if actions > 0 {
|
|
proxy.free_slots(actions);
|
|
actions = 0;
|
|
}
|
|
}
|
|
|
|
if let Some(redraw_at) = window_manager.redraw_at() {
|
|
let _ =
|
|
control_sender.start_send(Control::ChangeFlow(
|
|
ControlFlow::WaitUntil(redraw_at),
|
|
));
|
|
} else {
|
|
let _ = control_sender.start_send(
|
|
Control::ChangeFlow(ControlFlow::Wait),
|
|
);
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let _ = ManuallyDrop::into_inner(user_interfaces);
|
|
}
|
|
|
|
/// Builds a window's [`UserInterface`] for the [`Program`].
|
|
fn build_user_interface<'a, P: Program>(
|
|
program: &'a P,
|
|
cache: user_interface::Cache,
|
|
renderer: &mut P::Renderer,
|
|
size: Size,
|
|
debug: &mut Debug,
|
|
id: window::Id,
|
|
) -> UserInterface<'a, P::Message, P::Theme, P::Renderer>
|
|
where
|
|
P::Theme: theme::Base,
|
|
{
|
|
debug.view_started();
|
|
let view = program.view(id);
|
|
debug.view_finished();
|
|
|
|
debug.layout_started();
|
|
let user_interface = UserInterface::build(view, size, cache, renderer);
|
|
debug.layout_finished();
|
|
|
|
user_interface
|
|
}
|
|
|
|
fn update<P: Program, E: Executor>(
|
|
program: &mut P,
|
|
runtime: &mut Runtime<E, Proxy<P::Message>, Action<P::Message>>,
|
|
debug: &mut Debug,
|
|
messages: &mut Vec<P::Message>,
|
|
) where
|
|
P::Theme: theme::Base,
|
|
{
|
|
for message in messages.drain(..) {
|
|
debug.log_message(&message);
|
|
debug.update_started();
|
|
|
|
let task = runtime.enter(|| program.update(message));
|
|
debug.update_finished();
|
|
|
|
if let Some(stream) = runtime::task::into_stream(task) {
|
|
runtime.run(stream);
|
|
}
|
|
}
|
|
|
|
let subscription = runtime.enter(|| program.subscription());
|
|
runtime.track(subscription::into_recipes(subscription.map(Action::Output)));
|
|
}
|
|
|
|
fn run_action<P, C>(
|
|
action: Action<P::Message>,
|
|
program: &P,
|
|
compositor: &mut Option<C>,
|
|
events: &mut Vec<(window::Id, core::Event)>,
|
|
messages: &mut Vec<P::Message>,
|
|
clipboard: &mut Clipboard,
|
|
control_sender: &mut mpsc::UnboundedSender<Control>,
|
|
debug: &mut Debug,
|
|
interfaces: &mut FxHashMap<
|
|
window::Id,
|
|
UserInterface<'_, P::Message, P::Theme, P::Renderer>,
|
|
>,
|
|
window_manager: &mut WindowManager<P, C>,
|
|
ui_caches: &mut FxHashMap<window::Id, user_interface::Cache>,
|
|
is_window_opening: &mut bool,
|
|
) where
|
|
P: Program,
|
|
C: Compositor<Renderer = P::Renderer> + 'static,
|
|
P::Theme: theme::Base,
|
|
{
|
|
use crate::runtime::clipboard;
|
|
use crate::runtime::system;
|
|
use crate::runtime::window;
|
|
|
|
match action {
|
|
Action::Output(message) => {
|
|
messages.push(message);
|
|
}
|
|
Action::Clipboard(action) => match action {
|
|
clipboard::Action::Read { target, channel } => {
|
|
let _ = channel.send(clipboard.read(target));
|
|
}
|
|
clipboard::Action::Write { target, contents } => {
|
|
clipboard.write(target, contents);
|
|
}
|
|
},
|
|
Action::Window(action) => match action {
|
|
window::Action::Open(id, settings, channel) => {
|
|
let monitor = window_manager.last_monitor();
|
|
|
|
control_sender
|
|
.start_send(Control::CreateWindow {
|
|
id,
|
|
settings,
|
|
title: program.title(id),
|
|
monitor,
|
|
on_open: channel,
|
|
})
|
|
.expect("Send control action");
|
|
|
|
*is_window_opening = true;
|
|
}
|
|
window::Action::Close(id) => {
|
|
let _ = ui_caches.remove(&id);
|
|
let _ = interfaces.remove(&id);
|
|
|
|
if let Some(window) = window_manager.remove(id) {
|
|
if clipboard.window_id() == Some(window.raw.id()) {
|
|
*clipboard = window_manager
|
|
.first()
|
|
.map(|window| window.raw.clone())
|
|
.map(Clipboard::connect)
|
|
.unwrap_or_else(Clipboard::unconnected);
|
|
}
|
|
|
|
events.push((
|
|
id,
|
|
core::Event::Window(core::window::Event::Closed),
|
|
));
|
|
}
|
|
|
|
if window_manager.is_empty() {
|
|
*compositor = None;
|
|
}
|
|
}
|
|
window::Action::GetOldest(channel) => {
|
|
let id =
|
|
window_manager.iter_mut().next().map(|(id, _window)| id);
|
|
|
|
let _ = channel.send(id);
|
|
}
|
|
window::Action::GetLatest(channel) => {
|
|
let id =
|
|
window_manager.iter_mut().last().map(|(id, _window)| id);
|
|
|
|
let _ = channel.send(id);
|
|
}
|
|
window::Action::Drag(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = window.raw.drag_window();
|
|
}
|
|
}
|
|
window::Action::DragResize(id, direction) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = window.raw.drag_resize_window(
|
|
conversion::resize_direction(direction),
|
|
);
|
|
}
|
|
}
|
|
window::Action::Resize(id, size) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = window.raw.request_inner_size(
|
|
winit::dpi::LogicalSize {
|
|
width: size.width,
|
|
height: size.height,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
window::Action::SetMinSize(id, size) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_min_inner_size(size.map(|size| {
|
|
winit::dpi::LogicalSize {
|
|
width: size.width,
|
|
height: size.height,
|
|
}
|
|
}));
|
|
}
|
|
}
|
|
window::Action::SetMaxSize(id, size) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_max_inner_size(size.map(|size| {
|
|
winit::dpi::LogicalSize {
|
|
width: size.width,
|
|
height: size.height,
|
|
}
|
|
}));
|
|
}
|
|
}
|
|
window::Action::SetResizeIncrements(id, increments) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_resize_increments(increments.map(|size| {
|
|
winit::dpi::LogicalSize {
|
|
width: size.width,
|
|
height: size.height,
|
|
}
|
|
}));
|
|
}
|
|
}
|
|
window::Action::SetResizable(id, resizable) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_resizable(resizable);
|
|
}
|
|
}
|
|
window::Action::GetSize(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let size = window
|
|
.raw
|
|
.inner_size()
|
|
.to_logical(window.raw.scale_factor());
|
|
|
|
let _ = channel.send(Size::new(size.width, size.height));
|
|
}
|
|
}
|
|
window::Action::GetMaximized(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = channel.send(window.raw.is_maximized());
|
|
}
|
|
}
|
|
window::Action::Maximize(id, maximized) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_maximized(maximized);
|
|
}
|
|
}
|
|
window::Action::GetMinimized(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = channel.send(window.raw.is_minimized());
|
|
}
|
|
}
|
|
window::Action::Minimize(id, minimized) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_minimized(minimized);
|
|
}
|
|
}
|
|
window::Action::GetPosition(id, channel) => {
|
|
if let Some(window) = window_manager.get(id) {
|
|
let position = window
|
|
.raw
|
|
.outer_position()
|
|
.map(|position| {
|
|
let position = position
|
|
.to_logical::<f32>(window.raw.scale_factor());
|
|
|
|
Point::new(position.x, position.y)
|
|
})
|
|
.ok();
|
|
|
|
let _ = channel.send(position);
|
|
}
|
|
}
|
|
window::Action::GetScaleFactor(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let scale_factor = window.raw.scale_factor();
|
|
|
|
let _ = channel.send(scale_factor as f32);
|
|
}
|
|
}
|
|
window::Action::Move(id, position) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_outer_position(
|
|
winit::dpi::LogicalPosition {
|
|
x: position.x,
|
|
y: position.y,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
window::Action::SetMode(id, mode) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_visible(conversion::visible(mode));
|
|
window.raw.set_fullscreen(conversion::fullscreen(
|
|
window.raw.current_monitor(),
|
|
mode,
|
|
));
|
|
}
|
|
}
|
|
window::Action::SetIcon(id, icon) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_window_icon(conversion::icon(icon));
|
|
}
|
|
}
|
|
window::Action::GetMode(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let mode = if window.raw.is_visible().unwrap_or(true) {
|
|
conversion::mode(window.raw.fullscreen())
|
|
} else {
|
|
core::window::Mode::Hidden
|
|
};
|
|
|
|
let _ = channel.send(mode);
|
|
}
|
|
}
|
|
window::Action::ToggleMaximize(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_maximized(!window.raw.is_maximized());
|
|
}
|
|
}
|
|
window::Action::ToggleDecorations(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.set_decorations(!window.raw.is_decorated());
|
|
}
|
|
}
|
|
window::Action::RequestUserAttention(id, attention_type) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.request_user_attention(
|
|
attention_type.map(conversion::user_attention),
|
|
);
|
|
}
|
|
}
|
|
window::Action::GainFocus(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window.raw.focus_window();
|
|
}
|
|
}
|
|
window::Action::SetLevel(id, level) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
window
|
|
.raw
|
|
.set_window_level(conversion::window_level(level));
|
|
}
|
|
}
|
|
window::Action::ShowSystemMenu(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
if let mouse::Cursor::Available(point) =
|
|
window.state.cursor()
|
|
{
|
|
window.raw.show_window_menu(
|
|
winit::dpi::LogicalPosition {
|
|
x: point.x,
|
|
y: point.y,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
}
|
|
window::Action::GetRawId(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = channel.send(window.raw.id().into());
|
|
}
|
|
}
|
|
window::Action::RunWithHandle(id, f) => {
|
|
use window::raw_window_handle::HasWindowHandle;
|
|
|
|
if let Some(handle) = window_manager
|
|
.get_mut(id)
|
|
.and_then(|window| window.raw.window_handle().ok())
|
|
{
|
|
f(handle);
|
|
}
|
|
}
|
|
window::Action::Screenshot(id, channel) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
if let Some(compositor) = compositor {
|
|
let bytes = compositor.screenshot(
|
|
&mut window.renderer,
|
|
window.state.viewport(),
|
|
window.state.background_color(),
|
|
&debug.overlay(),
|
|
);
|
|
|
|
let _ = channel.send(core::window::Screenshot::new(
|
|
bytes,
|
|
window.state.physical_size(),
|
|
window.state.viewport().scale_factor(),
|
|
));
|
|
}
|
|
}
|
|
}
|
|
window::Action::EnableMousePassthrough(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = window.raw.set_cursor_hittest(false);
|
|
}
|
|
}
|
|
window::Action::DisableMousePassthrough(id) => {
|
|
if let Some(window) = window_manager.get_mut(id) {
|
|
let _ = window.raw.set_cursor_hittest(true);
|
|
}
|
|
}
|
|
},
|
|
Action::System(action) => match action {
|
|
system::Action::QueryInformation(_channel) => {
|
|
#[cfg(feature = "system")]
|
|
{
|
|
if let Some(compositor) = compositor {
|
|
let graphics_info = compositor.fetch_information();
|
|
|
|
let _ = std::thread::spawn(move || {
|
|
let information =
|
|
crate::system::information(graphics_info);
|
|
|
|
let _ = _channel.send(information);
|
|
});
|
|
}
|
|
}
|
|
}
|
|
},
|
|
Action::Widget(operation) => {
|
|
let mut current_operation = Some(operation);
|
|
|
|
while let Some(mut operation) = current_operation.take() {
|
|
for (id, ui) in interfaces.iter_mut() {
|
|
if let Some(window) = window_manager.get_mut(*id) {
|
|
ui.operate(&window.renderer, operation.as_mut());
|
|
}
|
|
}
|
|
|
|
match operation.finish() {
|
|
operation::Outcome::None => {}
|
|
operation::Outcome::Some(()) => {}
|
|
operation::Outcome::Chain(next) => {
|
|
current_operation = Some(next);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Action::LoadFont { bytes, channel } => {
|
|
if let Some(compositor) = compositor {
|
|
// TODO: Error handling (?)
|
|
compositor.load_font(bytes.clone());
|
|
|
|
let _ = channel.send(Ok(()));
|
|
}
|
|
}
|
|
Action::Exit => {
|
|
control_sender
|
|
.start_send(Control::Exit)
|
|
.expect("Send control action");
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Build the user interface for every window.
|
|
pub fn build_user_interfaces<'a, P: Program, C>(
|
|
program: &'a P,
|
|
debug: &mut Debug,
|
|
window_manager: &mut WindowManager<P, C>,
|
|
mut cached_user_interfaces: FxHashMap<window::Id, user_interface::Cache>,
|
|
) -> FxHashMap<window::Id, UserInterface<'a, P::Message, P::Theme, P::Renderer>>
|
|
where
|
|
C: Compositor<Renderer = P::Renderer>,
|
|
P::Theme: theme::Base,
|
|
{
|
|
cached_user_interfaces
|
|
.drain()
|
|
.filter_map(|(id, cache)| {
|
|
let window = window_manager.get_mut(id)?;
|
|
|
|
Some((
|
|
id,
|
|
build_user_interface(
|
|
program,
|
|
cache,
|
|
&mut window.renderer,
|
|
window.state.logical_size(),
|
|
debug,
|
|
id,
|
|
),
|
|
))
|
|
})
|
|
.collect()
|
|
}
|
|
|
|
/// Returns true if the provided event should cause a [`Program`] to
|
|
/// exit.
|
|
pub fn user_force_quit(
|
|
event: &winit::event::WindowEvent,
|
|
_modifiers: winit::keyboard::ModifiersState,
|
|
) -> bool {
|
|
match event {
|
|
#[cfg(target_os = "macos")]
|
|
winit::event::WindowEvent::KeyboardInput {
|
|
event:
|
|
winit::event::KeyEvent {
|
|
logical_key: winit::keyboard::Key::Character(c),
|
|
state: winit::event::ElementState::Pressed,
|
|
..
|
|
},
|
|
..
|
|
} if c == "q" && _modifiers.super_key() => true,
|
|
_ => false,
|
|
}
|
|
}
|