winit/src/platform_impl/web/event_loop/window_target.rs
John Nunley 6df972d108
feat: Add an owned display handle type
This was supposed to be rolled out with the rwh v0.6 update, but it
was left behind for some reason. I've added this type back.

Signed-off-by: John Nunley <dev@notgull.net>
2024-01-15 11:58:11 -08:00

730 lines
27 KiB
Rust

use std::cell::{Cell, RefCell};
use std::clone::Clone;
use std::collections::{vec_deque::IntoIter as VecDequeIter, VecDeque};
use std::iter;
use std::rc::{Rc, Weak};
use web_sys::Element;
use super::runner::{EventWrapper, Execution};
use super::{
super::{monitor::MonitorHandle, KeyEventExtra},
backend,
device::DeviceId,
runner,
window::WindowId,
};
use crate::event::{
DeviceId as RootDeviceId, ElementState, Event, KeyEvent, Touch, TouchPhase, WindowEvent,
};
use crate::event_loop::{ControlFlow, DeviceEvents};
use crate::keyboard::ModifiersState;
use crate::platform::web::PollStrategy;
use crate::platform_impl::platform::r#async::Waker;
use crate::window::{Theme, WindowId as RootWindowId};
#[derive(Default)]
struct ModifiersShared(Rc<Cell<ModifiersState>>);
impl ModifiersShared {
fn set(&self, new: ModifiersState) {
self.0.set(new)
}
fn get(&self) -> ModifiersState {
self.0.get()
}
}
impl Clone for ModifiersShared {
fn clone(&self) -> Self {
Self(Rc::clone(&self.0))
}
}
#[derive(Clone)]
pub struct EventLoopWindowTarget {
pub(crate) runner: runner::Shared,
modifiers: ModifiersShared,
}
impl EventLoopWindowTarget {
pub fn new() -> Self {
Self {
runner: runner::Shared::new(),
modifiers: ModifiersShared::default(),
}
}
pub fn run(&self, event_handler: Box<runner::EventHandler>, event_loop_recreation: bool) {
self.runner.event_loop_recreation(event_loop_recreation);
self.runner.set_listener(event_handler);
}
pub fn generate_id(&self) -> WindowId {
WindowId(self.runner.generate_id())
}
pub fn register(&self, canvas: &Rc<RefCell<backend::Canvas>>, id: WindowId) {
let canvas_clone = canvas.clone();
let mut canvas = canvas.borrow_mut();
#[cfg(any(feature = "rwh_04", feature = "rwh_05"))]
canvas.set_attribute("data-raw-handle", &id.0.to_string());
canvas.on_touch_start();
let runner = self.runner.clone();
let has_focus = canvas.has_focus.clone();
let modifiers = self.modifiers.clone();
canvas.on_blur(move || {
has_focus.set(false);
let clear_modifiers = (!modifiers.get().is_empty()).then(|| {
modifiers.set(ModifiersState::empty());
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(ModifiersState::empty().into()),
}
});
runner.send_events(
clear_modifiers
.into_iter()
.chain(iter::once(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Focused(false),
})),
);
});
let runner = self.runner.clone();
let has_focus = canvas.has_focus.clone();
canvas.on_focus(move || {
if !has_focus.replace(true) {
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Focused(true),
});
}
});
// It is possible that at this point the canvas has
// been focused before the callback can be called.
let focused = canvas
.document()
.active_element()
.filter(|element| {
let canvas: &Element = canvas.raw();
element == canvas
})
.is_some();
if focused {
canvas.has_focus.set(true);
self.runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Focused(true),
})
}
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
canvas.on_keyboard_press(
move |physical_key, logical_key, text, location, repeat, active_modifiers| {
let modifiers_changed = (modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let device_id = RootDeviceId(unsafe { DeviceId::dummy() });
runner.send_events(
iter::once(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::KeyboardInput {
device_id,
event: KeyEvent {
physical_key,
logical_key,
text,
location,
state: ElementState::Pressed,
repeat,
platform_specific: KeyEventExtra,
},
is_synthetic: false,
},
})
.chain(modifiers_changed),
);
},
);
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
canvas.on_keyboard_release(
move |physical_key, logical_key, text, location, repeat, active_modifiers| {
let modifiers_changed = (modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let device_id = RootDeviceId(unsafe { DeviceId::dummy() });
runner.send_events(
iter::once(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::KeyboardInput {
device_id,
event: KeyEvent {
physical_key,
logical_key,
text,
location,
state: ElementState::Released,
repeat,
platform_specific: KeyEventExtra,
},
is_synthetic: false,
},
})
.chain(modifiers_changed),
)
},
);
let has_focus = canvas.has_focus.clone();
canvas.on_cursor_leave({
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, pointer_id| {
let focus = (has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let pointer = pointer_id.map(|pointer_id| Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorLeft {
device_id: RootDeviceId(DeviceId(pointer_id)),
},
});
if focus.is_some() || pointer.is_some() {
runner.send_events(focus.into_iter().chain(pointer))
}
}
});
canvas.on_cursor_enter({
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, pointer_id| {
let focus = (has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let pointer = pointer_id.map(|pointer_id| Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorEntered {
device_id: RootDeviceId(DeviceId(pointer_id)),
},
});
if focus.is_some() || pointer.is_some() {
runner.send_events(focus.into_iter().chain(pointer))
}
}
});
canvas.on_cursor_move(
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers| {
if has_focus.get() && modifiers.get() != active_modifiers {
modifiers.set(active_modifiers);
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
})
}
}
},
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, pointer_id, events| {
let modifiers =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
runner.send_events(modifiers.into_iter().chain(events.flat_map(|position| {
let device_id = RootDeviceId(DeviceId(pointer_id));
iter::once(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorMoved {
device_id,
position,
},
})
})));
}
},
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, device_id, events| {
let modifiers =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
runner.send_events(modifiers.into_iter().chain(events.map(
|(location, force)| Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Touch(Touch {
id: device_id as u64,
device_id: RootDeviceId(DeviceId(device_id)),
phase: TouchPhase::Moved,
force: Some(force),
location,
}),
},
)));
}
},
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers,
pointer_id,
position: crate::dpi::PhysicalPosition<f64>,
buttons,
button| {
let modifiers =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let device_id = RootDeviceId(DeviceId(pointer_id));
let state = if buttons.contains(button.into()) {
ElementState::Pressed
} else {
ElementState::Released
};
// A chorded button event may come in without any prior CursorMoved events,
// therefore we should send a CursorMoved event to make sure that the
// user code has the correct cursor position.
runner.send_events(modifiers.into_iter().chain([
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorMoved {
device_id,
position,
},
},
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::MouseInput {
device_id,
state,
button,
},
},
]));
}
},
);
canvas.on_mouse_press(
{
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers| {
if modifiers.get() != active_modifiers {
modifiers.set(active_modifiers);
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
})
}
}
},
{
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, pointer_id, position, button| {
let modifiers = (modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let device_id: RootDeviceId = RootDeviceId(DeviceId(pointer_id));
// A mouse down event may come in without any prior CursorMoved events,
// therefore we should send a CursorMoved event to make sure that the
// user code has the correct cursor position.
runner.send_events(modifiers.into_iter().chain([
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorMoved {
device_id,
position,
},
},
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::MouseInput {
device_id,
state: ElementState::Pressed,
button,
},
},
]));
}
},
{
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, device_id, location, force| {
let modifiers = (modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
runner.send_events(modifiers.into_iter().chain(iter::once(
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Touch(Touch {
id: device_id as u64,
device_id: RootDeviceId(DeviceId(device_id)),
phase: TouchPhase::Started,
force: Some(force),
location,
}),
},
)))
}
},
);
canvas.on_mouse_release(
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers| {
if has_focus.get() && modifiers.get() != active_modifiers {
modifiers.set(active_modifiers);
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
});
}
}
},
{
let runner = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, pointer_id, position, button| {
let modifiers =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
let device_id: RootDeviceId = RootDeviceId(DeviceId(pointer_id));
// A mouse up event may come in without any prior CursorMoved events,
// therefore we should send a CursorMoved event to make sure that the
// user code has the correct cursor position.
runner.send_events(modifiers.into_iter().chain([
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::CursorMoved {
device_id,
position,
},
},
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::MouseInput {
device_id,
state: ElementState::Released,
button,
},
},
]));
}
},
{
let runner_touch = self.runner.clone();
let has_focus = has_focus.clone();
let modifiers = self.modifiers.clone();
move |active_modifiers, device_id, location, force| {
let modifiers =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
runner_touch.send_events(modifiers.into_iter().chain(iter::once(
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Touch(Touch {
id: device_id as u64,
device_id: RootDeviceId(DeviceId(device_id)),
phase: TouchPhase::Ended,
force: Some(force),
location,
}),
},
)));
}
},
);
let runner = self.runner.clone();
let modifiers = self.modifiers.clone();
canvas.on_mouse_wheel(move |pointer_id, delta, active_modifiers| {
let modifiers_changed =
(has_focus.get() && modifiers.get() != active_modifiers).then(|| {
modifiers.set(active_modifiers);
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ModifiersChanged(active_modifiers.into()),
}
});
runner.send_events(modifiers_changed.into_iter().chain(iter::once(
Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::MouseWheel {
device_id: RootDeviceId(DeviceId(pointer_id)),
delta,
phase: TouchPhase::Moved,
},
},
)));
});
let runner = self.runner.clone();
canvas.on_touch_cancel(move |device_id, location, force| {
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Touch(Touch {
id: device_id as u64,
device_id: RootDeviceId(DeviceId(device_id)),
phase: TouchPhase::Cancelled,
force: Some(force),
location,
}),
});
});
let runner = self.runner.clone();
canvas.on_dark_mode(move |is_dark_mode| {
let theme = if is_dark_mode {
Theme::Dark
} else {
Theme::Light
};
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::ThemeChanged(theme),
});
});
canvas.on_resize_scale(
{
let runner = self.runner.clone();
let canvas = canvas_clone.clone();
move |size, scale| {
runner.send_event(EventWrapper::ScaleChange {
canvas: Rc::downgrade(&canvas),
size,
scale,
})
}
},
{
let runner = self.runner.clone();
let canvas = canvas_clone.clone();
move |new_size| {
let canvas = canvas.borrow();
canvas.set_current_size(new_size);
if canvas.old_size() != new_size {
canvas.set_old_size(new_size);
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Resized(new_size),
});
runner.request_redraw(RootWindowId(id));
}
}
},
);
let runner = self.runner.clone();
canvas.on_intersection(move |is_intersecting| {
// only fire if visible while skipping the first event if it's intersecting
if backend::is_visible(runner.document())
&& !(is_intersecting && canvas_clone.borrow().is_intersecting.is_none())
{
runner.send_event(Event::WindowEvent {
window_id: RootWindowId(id),
event: WindowEvent::Occluded(!is_intersecting),
});
}
canvas_clone.borrow_mut().is_intersecting = Some(is_intersecting);
});
let runner = self.runner.clone();
canvas.on_animation_frame(move || runner.request_redraw(RootWindowId(id)));
canvas.on_context_menu();
}
pub fn available_monitors(&self) -> VecDequeIter<MonitorHandle> {
VecDeque::new().into_iter()
}
pub fn primary_monitor(&self) -> Option<MonitorHandle> {
None
}
#[cfg(feature = "rwh_05")]
#[inline]
pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
rwh_05::RawDisplayHandle::Web(rwh_05::WebDisplayHandle::empty())
}
#[cfg(feature = "rwh_06")]
#[inline]
pub fn raw_display_handle_rwh_06(
&self,
) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
Ok(rwh_06::RawDisplayHandle::Web(
rwh_06::WebDisplayHandle::new(),
))
}
pub fn listen_device_events(&self, allowed: DeviceEvents) {
self.runner.listen_device_events(allowed)
}
pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
self.runner.set_control_flow(control_flow)
}
pub(crate) fn control_flow(&self) -> ControlFlow {
self.runner.control_flow()
}
pub(crate) fn exit(&self) {
self.runner.exit()
}
pub(crate) fn exiting(&self) -> bool {
self.runner.exiting()
}
pub(crate) fn set_poll_strategy(&self, strategy: PollStrategy) {
self.runner.set_poll_strategy(strategy)
}
pub(crate) fn poll_strategy(&self) -> PollStrategy {
self.runner.poll_strategy()
}
pub(crate) fn waker(&self) -> Waker<Weak<Execution>> {
self.runner.waker()
}
pub(crate) fn owned_display_handle(&self) -> OwnedDisplayHandle {
OwnedDisplayHandle
}
}
#[derive(Clone)]
pub(crate) struct OwnedDisplayHandle;
impl OwnedDisplayHandle {
#[cfg(feature = "rwh_05")]
#[inline]
pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
rwh_05::WebDisplayHandle::empty().into()
}
#[cfg(feature = "rwh_06")]
#[inline]
pub fn raw_display_handle_rwh_06(
&self,
) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
Ok(rwh_06::WebDisplayHandle::new().into())
}
}