smithay/examples/helpers/window_map.rs

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2017-09-22 12:56:59 +00:00
use smithay::compositor::{CompositorToken, SubsurfaceRole, SurfaceAttributes, TraversalAction};
use smithay::compositor::roles::Role;
use smithay::shell::{ShellSurfaceRole, ToplevelSurface};
use smithay::utils::Rectangle;
use wayland_server::Resource;
use wayland_server::protocol::wl_surface;
struct Window<U, R, CID, SD> {
location: (i32, i32),
surface: Rectangle,
toplevel: ToplevelSurface<U, R, CID, SD>,
}
impl<U, R, CID, SD> Window<U, R, CID, SD>
where
U: 'static,
R: Role<SubsurfaceRole> + Role<ShellSurfaceRole> + 'static,
CID: 'static,
SD: 'static,
{
// Find the topmost surface under this point if any and the location of this point in the surface
fn matching<F>(&self, point: (f64, f64), ctoken: CompositorToken<U, R, CID>, get_size: F)
-> Option<(wl_surface::WlSurface, (f64, f64))>
where
F: Fn(&SurfaceAttributes<U>) -> Option<(i32, i32)>,
{
if !self.surface.contains((point.0 as i32, point.1 as i32)) {
return None;
}
// need to check more carefully
let mut found = None;
if let Some(wl_surface) = self.toplevel.get_surface() {
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let _ = ctoken.with_surface_tree_downward(
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wl_surface,
self.location,
|wl_surface, attributes, role, &(mut x, mut y)| if let Some((w, h)) = get_size(attributes) {
if let Ok(subdata) = Role::<SubsurfaceRole>::data(role) {
x += subdata.x;
y += subdata.y;
}
let my_rect = Rectangle {
x,
y,
width: w,
height: h,
};
if my_rect.contains((point.0 as i32, point.1 as i32)) {
found = wl_surface.clone().map(|s| {
(s, (point.0 - my_rect.x as f64, point.1 - my_rect.y as f64))
});
TraversalAction::Break
} else {
TraversalAction::DoChildren((x, y))
}
} else {
TraversalAction::SkipChildren
},
);
}
found
}
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fn self_update<F>(&mut self, ctoken: CompositorToken<U, R, CID>, get_size: F)
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where
F: Fn(&SurfaceAttributes<U>) -> Option<(i32, i32)>,
{
let (base_x, base_y) = self.location;
let (mut min_x, mut min_y, mut max_x, mut max_y) = (base_x, base_y, base_x, base_y);
if let Some(wl_surface) = self.toplevel.get_surface() {
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let _ = ctoken.with_surface_tree_downward(
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wl_surface,
(base_x, base_y),
|_, attributes, role, &(mut x, mut y)| {
if let Some((w, h)) = get_size(attributes) {
if let Ok(subdata) = Role::<SubsurfaceRole>::data(role) {
x += subdata.x;
y += subdata.y;
}
// update the bounding box
if x < min_x {
min_x = x;
}
if y < min_y {
min_y = y;
}
if x + w > max_x {
max_x = x + w;
}
if y + h > max_y {
max_y = y + w;
}
TraversalAction::DoChildren((x, y))
} else {
TraversalAction::SkipChildren
}
},
);
}
self.surface = Rectangle {
x: min_x,
y: min_y,
width: max_x - min_x,
height: max_y - min_y,
};
}
}
pub struct WindowMap<U, R, CID, SD, F> {
ctoken: CompositorToken<U, R, CID>,
windows: Vec<Window<U, R, CID, SD>>,
get_size: F,
}
impl<U, R, CID, SD, F> WindowMap<U, R, CID, SD, F>
where
F: Fn(&SurfaceAttributes<U>) -> Option<(i32, i32)>,
U: 'static,
R: Role<SubsurfaceRole> + Role<ShellSurfaceRole> + 'static,
CID: 'static,
SD: 'static,
{
pub fn new(ctoken: CompositorToken<U, R, CID>, get_size: F) -> WindowMap<U, R, CID, SD, F> {
WindowMap {
ctoken: ctoken,
windows: Vec::new(),
get_size: get_size,
}
}
pub fn insert(&mut self, toplevel: ToplevelSurface<U, R, CID, SD>, location: (i32, i32)) {
let mut window = Window {
location: location,
surface: Rectangle {
x: 0,
y: 0,
width: 0,
height: 0,
},
toplevel: toplevel,
};
window.self_update(self.ctoken, &self.get_size);
self.windows.insert(0, window);
}
pub fn get_surface_under(&self, point: (f64, f64)) -> Option<(wl_surface::WlSurface, (f64, f64))> {
for w in &self.windows {
if let Some(surface) = w.matching(point, self.ctoken, &self.get_size) {
return Some(surface);
}
}
None
}
pub fn get_surface_and_bring_to_top(&mut self, point: (f64, f64))
-> Option<(wl_surface::WlSurface, (f64, f64))> {
let mut found = None;
for (i, w) in self.windows.iter().enumerate() {
if let Some(surface) = w.matching(point, self.ctoken, &self.get_size) {
found = Some((i, surface));
break;
}
}
if let Some((i, surface)) = found {
let winner = self.windows.remove(i);
self.windows.insert(0, winner);
Some(surface)
} else {
None
}
}
pub fn with_windows_from_bottom_to_top<Func>(&self, mut f: Func)
where
Func: FnMut(&ToplevelSurface<U, R, CID, SD>, (i32, i32)),
{
for w in self.windows.iter().rev() {
f(&w.toplevel, w.location)
}
}
pub fn refresh(&mut self) {
self.windows.retain(|w| w.toplevel.alive());
for w in self.windows.iter_mut() {
w.self_update(self.ctoken, &self.get_size);
}
}
pub fn clear(&mut self) {
self.windows.clear();
}
}