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use env::Environment;
use output::OutputMgr;
use std::sync::Mutex;
use wayland_client::protocol::{wl_output, wl_surface};
pub(crate) struct SurfaceUserData {
dpi_factor: i32,
outputs: Vec<wl_output::WlOutput>,
output_manager: OutputMgr,
dpi_change_cb: Box<FnMut(i32, wl_surface::WlSurface) + Send + 'static>,
}
impl SurfaceUserData {
fn new(
output_manager: OutputMgr,
dpi_change_cb: Box<FnMut(i32, wl_surface::WlSurface) + Send + 'static>,
) -> Self {
SurfaceUserData {
dpi_factor: 1,
outputs: Vec::new(),
output_manager,
dpi_change_cb,
}
}
pub(crate) fn enter(&mut self, output: wl_output::WlOutput, surface: wl_surface::WlSurface) {
self.outputs.push(output);
self.compute_dpi_factor(surface);
}
pub(crate) fn leave(&mut self, output: &wl_output::WlOutput, surface: wl_surface::WlSurface) {
self.outputs
.retain(|output2| !output.as_ref().equals(output2.as_ref()));
self.compute_dpi_factor(surface);
}
fn compute_dpi_factor(&mut self, surface: wl_surface::WlSurface) {
let mut scale_factor = 1;
for output in &self.outputs {
if let Some(scale_factor2) = self
.output_manager
.with_info(&output, |_id, info| info.scale_factor)
{
scale_factor = ::std::cmp::max(scale_factor, scale_factor2);
}
}
if self.dpi_factor != scale_factor {
self.dpi_factor = scale_factor;
(self.dpi_change_cb)(scale_factor, surface.clone());
}
}
}
pub(crate) fn create_surface<F>(
environment: &Environment,
dpi_change: Box<F>,
) -> wl_surface::WlSurface
where
F: FnMut(i32, wl_surface::WlSurface) + Send + 'static,
{
environment
.compositor
.create_surface(move |surface| {
surface.implement_closure_threadsafe(
move |event, surface| {
let mut user_data = surface
.as_ref()
.user_data::<Mutex<SurfaceUserData>>()
.unwrap()
.lock()
.unwrap();
match event {
wl_surface::Event::Enter { output } => {
user_data.enter(output, surface.clone());
}
wl_surface::Event::Leave { output } => {
user_data.leave(&output, surface.clone());
}
_ => unreachable!(),
};
},
Mutex::new(SurfaceUserData::new(
environment.outputs.clone(),
dpi_change,
)),
)
})
.unwrap()
}
pub fn get_dpi_factor(surface: &wl_surface::WlSurface) -> i32 {
surface
.as_ref()
.user_data::<Mutex<SurfaceUserData>>()
.expect("Surface was not created with create_surface.")
.lock()
.unwrap()
.dpi_factor
}
pub(crate) fn try_get_dpi_factor(surface: &wl_surface::WlSurface) -> Option<i32> {
if let Some(user_data) = surface.as_ref().user_data::<Mutex<SurfaceUserData>>() {
Some(user_data.lock().unwrap().dpi_factor)
} else {
None
}
}
pub fn get_outputs(surface: &wl_surface::WlSurface) -> Vec<wl_output::WlOutput> {
surface
.as_ref()
.user_data::<Mutex<SurfaceUserData>>()
.expect("Surface was not created with create_surface.")
.lock()
.unwrap()
.outputs
.clone()
}