zng_ext_window/lib.rs
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#![doc(html_favicon_url = "https://raw.githubusercontent.com/zng-ui/zng/main/examples/image/res/zng-logo-icon.png")]
#![doc(html_logo_url = "https://raw.githubusercontent.com/zng-ui/zng/main/examples/image/res/zng-logo.png")]
//!
//! App window and monitors manager.
//!
//! # Crate
//!
#![doc = include_str!(concat!("../", std::env!("CARGO_PKG_README")))]
#![warn(unused_extern_crates)]
#![warn(missing_docs)]
// suppress nag about very simple boxed closure signatures.
#![expect(clippy::type_complexity)]
#[macro_use]
extern crate bitflags;
mod control;
pub use control::{NestedWindowNode, NestedWindowWidgetInfoExt, OpenNestedHandlerArgs};
mod ime;
pub use ime::*;
mod types;
pub use types::*;
mod monitor;
pub use monitor::*;
mod vars;
pub use vars::*;
mod service;
pub use service::*;
use std::future::{Future, IntoFuture};
use zng_app::{
update::{EventUpdate, InfoUpdates, LayoutUpdates, RenderUpdates, WidgetUpdates},
view_process::raw_events::{RawWindowFocusArgs, RAW_WINDOW_FOCUS_EVENT},
window::WindowId,
AppControlFlow, AppExtended, AppExtension, HeadlessApp,
};
use zng_ext_image::{ImageVar, IMAGES_WINDOW};
use zng_view_api::image::ImageMaskMode;
pub mod cmd;
/// Application extension that manages windows.
///
/// # Events
///
/// Events this extension provides:
///
/// * [`WINDOW_OPEN_EVENT`]
/// * [`WINDOW_CHANGED_EVENT`]
/// * [`WINDOW_FOCUS_CHANGED_EVENT`]
/// * [`WINDOW_CLOSE_REQUESTED_EVENT`]
/// * [`WINDOW_CLOSE_EVENT`]
/// * [`MONITORS_CHANGED_EVENT`]
///
/// # Services
///
/// Services this extension provides:
///
/// * [`WINDOWS`]
/// * [`MONITORS`]
///
/// The [`WINDOWS`] service is also setup as the implementer for [`IMAGES`] rendering.
///
/// [`IMAGES`]: zng_ext_image::IMAGES
#[derive(Default)]
pub struct WindowManager {}
impl AppExtension for WindowManager {
fn init(&mut self) {
IMAGES_WINDOW.hook_render_windows_service(Box::new(WINDOWS));
}
fn event_preview(&mut self, update: &mut EventUpdate) {
MonitorsService::on_pre_event(update);
WINDOWS::on_pre_event(update);
}
fn event_ui(&mut self, update: &mut EventUpdate) {
WINDOWS::on_ui_event(update);
}
fn event(&mut self, update: &mut EventUpdate) {
WINDOWS::on_event(update);
}
fn update_ui(&mut self, update_widgets: &mut WidgetUpdates) {
WINDOWS::on_ui_update(update_widgets);
}
fn update(&mut self) {
WINDOWS::on_update();
}
fn info(&mut self, info_widgets: &mut InfoUpdates) {
WINDOWS::on_info(info_widgets);
}
fn layout(&mut self, layout_widgets: &mut LayoutUpdates) {
WINDOWS::on_layout(layout_widgets);
}
fn render(&mut self, render_widgets: &mut RenderUpdates, render_update_widgets: &mut RenderUpdates) {
WINDOWS::on_render(render_widgets, render_update_widgets);
}
}
/// Extension trait, adds [`run_window`] to [`AppExtended`].
///
/// [`run_window`]: AppRunWindowExt::run_window
/// [`AppExtended`]: zng_app::AppExtended
pub trait AppRunWindowExt {
/// Runs the application event loop and requests a new window.
///
/// The window opens after the future returns it. The [`WINDOW`] context for the new window is already available in the `new_window` future.
///
/// This method only returns when the app has exited.
///
/// # Examples
///
/// ```no_run
/// # use zng_app::window::WINDOW;
/// # use zng_app::APP;
/// # use zng_ext_window::AppRunWindowExt as _;
/// # trait AppDefaults { fn defaults(&self) -> zng_app::AppExtended<impl zng_app::AppExtension> { APP.minimal() } }
/// # impl AppDefaults for APP { }
/// # macro_rules! Window { ($($tt:tt)*) => { unimplemented!() } }
/// APP.defaults().run_window(async {
/// println!("starting app with window {:?}", WINDOW.id());
/// Window! {
/// title = "Window 1";
/// child = Text!("Window 1");
/// }
/// })
/// ```
///
/// Which is a shortcut for:
///
/// ```no_run
/// # use zng_app::window::WINDOW;
/// # use zng_ext_window::WINDOWS;
/// # use zng_app::APP;
/// # use zng_ext_window::AppRunWindowExt as _;
/// # trait AppDefaults { fn defaults(&self) -> zng_app::AppExtended<impl zng_app::AppExtension> { APP.minimal() } }
/// # impl AppDefaults for APP { }
/// # macro_rules! Window { ($($tt:tt)*) => { unimplemented!() } }
/// APP.defaults().run(async {
/// WINDOWS.open(async {
/// println!("starting app with window {:?}", WINDOW.id());
/// Window! {
/// title = "Window 1";
/// child = Text!("Window 1");
/// }
/// });
/// })
/// ```
///
/// [`WINDOW`]: zng_app::window::WINDOW
fn run_window<F>(self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Future<Output = WindowRoot> + Send + 'static;
}
impl<E: AppExtension> AppRunWindowExt for AppExtended<E> {
fn run_window<F>(self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Future<Output = WindowRoot> + Send + 'static,
{
let new_window = new_window.into_future();
self.run(async move {
WINDOWS.open(new_window);
})
}
}
/// Window extension methods for [`HeadlessApp`].
///
/// [`open_window`]: HeadlessAppWindowExt::open_window
/// [`HeadlessApp`]: zng_app::HeadlessApp
pub trait HeadlessAppWindowExt {
/// Open a new headless window and returns the new window ID.
///
/// The `new_window` runs inside the [`WINDOW`] context of the new window.
///
/// Returns the [`WindowId`] of the new window after the window is open and loaded and has generated one frame
/// or if the window already closed before the first frame.
///
/// [`WINDOW`]: zng_app::window::WINDOW
/// [`WindowId`]: zng_app::window::WindowId
fn open_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>) -> WindowId
where
F: Future<Output = WindowRoot> + Send + 'static;
/// Cause the headless window to think it is focused in the screen.
fn focus_window(&mut self, window_id: WindowId);
/// Cause the headless window to think focus moved away from it.
fn blur_window(&mut self, window_id: WindowId);
/// Copy the current frame pixels of the window.
///
/// The var will update until the image is loaded or error.
fn window_frame_image(&mut self, window_id: WindowId, mask: Option<ImageMaskMode>) -> ImageVar;
/// Sends a close request.
///
/// Returns if the window was found and closed.
fn close_window(&mut self, window_id: WindowId) -> bool;
/// Open a new headless window and update the app until the window closes.
fn run_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Send + Future<Output = WindowRoot> + 'static;
/// Open a new headless window and update the app until the window closes or 60 seconds elapse.
#[cfg(any(test, doc, feature = "test_util"))]
fn doc_test_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Future<Output = WindowRoot> + 'static + Send;
}
impl HeadlessAppWindowExt for HeadlessApp {
fn open_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>) -> WindowId
where
F: Future<Output = WindowRoot> + Send + 'static,
{
zng_app::APP.extensions().require::<WindowManager>();
let response = WINDOWS.open(new_window);
self.run_task(async move {
let window_id = response.wait_rsp().await;
if !WINDOWS.is_loaded(window_id) {
let close_rcv = WINDOW_CLOSE_EVENT.receiver();
let frame_rcv = FRAME_IMAGE_READY_EVENT.receiver();
zng_task::any!(
async {
while let Ok(args) = close_rcv.recv_async().await {
if args.windows.contains(&window_id) {
break;
}
}
},
async {
while let Ok(args) = frame_rcv.recv_async().await {
if args.window_id == window_id {
break;
}
}
}
)
.await;
}
window_id
})
.unwrap()
}
fn focus_window(&mut self, window_id: WindowId) {
let args = RawWindowFocusArgs::now(None, Some(window_id));
RAW_WINDOW_FOCUS_EVENT.notify(args);
let _ = self.update(false);
}
fn blur_window(&mut self, window_id: WindowId) {
let args = RawWindowFocusArgs::now(Some(window_id), None);
RAW_WINDOW_FOCUS_EVENT.notify(args);
let _ = self.update(false);
}
fn window_frame_image(&mut self, window_id: WindowId, mask: Option<ImageMaskMode>) -> ImageVar {
WINDOWS.frame_image(window_id, mask)
}
fn close_window(&mut self, window_id: WindowId) -> bool {
use zng_app::view_process::raw_events::*;
let args = RawWindowCloseRequestedArgs::now(window_id);
RAW_WINDOW_CLOSE_REQUESTED_EVENT.notify(args);
let mut requested = false;
let mut closed = false;
let _ = self.update_observe_event(
|update| {
if let Some(args) = WINDOW_CLOSE_REQUESTED_EVENT.on(update) {
requested |= args.windows.contains(&window_id);
} else if let Some(args) = WINDOW_CLOSE_EVENT.on(update) {
closed |= args.windows.contains(&window_id);
}
},
false,
);
assert_eq!(requested, closed);
closed
}
fn run_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Future<Output = WindowRoot> + Send + 'static,
{
let window_id = self.open_window(new_window);
while WINDOWS.is_open(window_id) {
if let AppControlFlow::Exit = self.update(true) {
return;
}
}
}
#[cfg(any(test, doc, feature = "test_util"))]
fn doc_test_window<F>(&mut self, new_window: impl IntoFuture<IntoFuture = F>)
where
F: Future<Output = WindowRoot> + Send + 'static,
{
use zng_layout::unit::TimeUnits;
use zng_var::Var;
let timer = zng_app::timer::TIMERS.deadline(60.secs());
zng_task::spawn(async {
zng_task::deadline(65.secs()).await;
eprintln!("doc_test_window reached 65s fallback deadline");
zng_env::exit(-1);
});
let window_id = self.open_window(new_window);
while WINDOWS.is_open(window_id) {
if let AppControlFlow::Exit = self.update(true) {
return;
}
if timer.get().has_elapsed() {
panic!("doc_test_window reached 60s deadline");
}
}
}
}