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gtk4.rs
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gtk4.rs
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use std::{fmt, sync::Arc};
use futures::lock::Mutex;
use gdk::Backend;
#[cfg(feature = "raw_handle")]
use glib::translate::ToGlibPtr;
use gtk4::{
gdk,
glib::{self, clone},
prelude::*,
};
#[cfg(feature = "raw_handle")]
use raw_window_handle::{RawWindowHandle, WaylandHandle, XlibHandle};
use super::WindowIdentifierType;
static WINDOW_HANDLE_KEY: &str = "ashpd-wayland-gtk4-window-handle";
pub struct Gtk4WindowIdentifier {
native: gtk4::Native,
type_: WindowIdentifierType,
}
impl Gtk4WindowIdentifier {
pub async fn new(native: &impl glib::IsA<gtk4::Native>) -> Option<Self> {
let surface = native.surface();
match surface.display().backend() {
#[cfg(feature = "gtk4_wayland")]
Backend::Wayland => {
let top_level = surface
.downcast_ref::<gdk4wayland::WaylandToplevel>()
.unwrap();
let handle = unsafe {
if let Some(mut handle) = top_level.data(WINDOW_HANDLE_KEY) {
let (handle, ref_count): &mut (Option<String>, u8) = handle.as_mut();
*ref_count += 1;
handle.clone()
} else {
let (sender, receiver) = futures::channel::oneshot::channel::<String>();
let sender = Arc::new(Mutex::new(Some(sender)));
top_level.export_handle(clone!(@strong sender => move |_, handle| {
let ctx = glib::MainContext::default();
let handle = handle.to_owned();
ctx.spawn_local(clone!(@strong sender, @strong handle => async move {
if let Some(m) = sender.lock().await.take() {
let _ = m.send(handle);
}
}));
}));
let handle = receiver.await.ok();
top_level.set_data(WINDOW_HANDLE_KEY, (handle.clone(), 1));
handle
}
};
Some(Gtk4WindowIdentifier {
native: native.clone().upcast(),
type_: WindowIdentifierType::Wayland(handle.unwrap_or_default()),
})
}
#[cfg(feature = "gtk4_x11")]
Backend::X11 => {
let xid = surface
.downcast_ref::<gdk4x11::X11Surface>()
.map(|w| w.xid())?;
Some(Gtk4WindowIdentifier {
native: native.clone().upcast(),
type_: WindowIdentifierType::X11(xid),
})
}
_ => None,
}
}
#[cfg(feature = "raw_handle")]
pub fn as_raw_handle(&self) -> RawWindowHandle {
let surface = self.native.surface();
let display = surface.display();
unsafe {
match self.type_ {
#[cfg(feature = "gtk4_wayland")]
WindowIdentifierType::Wayland(_) => {
let mut wayland_handle = WaylandHandle::empty();
wayland_handle.surface = gdk4wayland::ffi::gdk_wayland_surface_get_wl_surface(
surface
.downcast_ref::<gdk4wayland::WaylandSurface>()
.unwrap()
.to_glib_none()
.0,
);
wayland_handle.display = gdk4wayland::ffi::gdk_wayland_display_get_wl_display(
display
.downcast_ref::<gdk4wayland::WaylandDisplay>()
.unwrap()
.to_glib_none()
.0,
);
RawWindowHandle::Wayland(wayland_handle)
}
#[cfg(feature = "gtk4_x11")]
WindowIdentifierType::X11(xid) => {
let mut x11_handle = XlibHandle::empty();
x11_handle.window = xid;
x11_handle.display = gdk4x11::ffi::gdk_x11_display_get_xdisplay(
display
.downcast_ref::<gdk4x11::X11Display>()
.unwrap()
.to_glib_none()
.0,
);
RawWindowHandle::Xlib(x11_handle)
}
}
}
}
}
impl fmt::Display for Gtk4WindowIdentifier {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(&format!("{}", self.type_))
}
}
impl Drop for Gtk4WindowIdentifier {
fn drop(&mut self) {
match self.type_ {
#[cfg(feature = "gtk4_wayland")]
WindowIdentifierType::Wayland(_) => {
let surface = self.native.surface();
let top_level = surface
.downcast_ref::<gdk4wayland::WaylandToplevel>()
.unwrap();
unsafe {
let (_handle, ref_count): &mut (Option<String>, u8) =
top_level.data(WINDOW_HANDLE_KEY).unwrap().as_mut();
if ref_count > &mut 1 {
*ref_count -= 1;
return;
}
top_level.unexport_handle();
let _ = top_level.steal_data::<(Option<String>, u8)>(WINDOW_HANDLE_KEY);
}
}
_ => (),
}
}
}