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use niri_config::layer_rule::LayerRule;
use niri_config::Config;
use smithay::backend::renderer::element::surface::{
render_elements_from_surface_tree, WaylandSurfaceRenderElement,
};
use smithay::backend::renderer::element::Kind;
use smithay::desktop::{LayerSurface, PopupManager};
use smithay::utils::{Logical, Point, Scale, Size};
use smithay::wayland::shell::wlr_layer::{ExclusiveZone, Layer};
use super::ResolvedLayerRules;
use crate::animation::Clock;
use crate::layout::shadow::Shadow;
use crate::niri_render_elements;
use crate::render_helpers::renderer::NiriRenderer;
use crate::render_helpers::shadow::ShadowRenderElement;
use crate::render_helpers::solid_color::{SolidColorBuffer, SolidColorRenderElement};
use crate::render_helpers::{RenderTarget, SplitElements};
use crate::utils::{baba_is_float_offset, round_logical_in_physical};
#[derive(Debug)]
pub struct MappedLayer {
/// The surface itself.
surface: LayerSurface,
/// Up-to-date rules.
rules: ResolvedLayerRules,
/// Buffer to draw instead of the surface when it should be blocked out.
block_out_buffer: SolidColorBuffer,
/// The shadow around the surface.
shadow: Shadow,
/// The view size for the layer surface's output.
view_size: Size<f64, Logical>,
/// Scale of the output the layer surface is on (and rounds its sizes to).
scale: f64,
/// Clock for driving animations.
clock: Clock,
}
niri_render_elements! {
LayerSurfaceRenderElement<R> => {
Wayland = WaylandSurfaceRenderElement<R>,
SolidColor = SolidColorRenderElement,
Shadow = ShadowRenderElement,
}
}
impl MappedLayer {
pub fn new(
surface: LayerSurface,
rules: ResolvedLayerRules,
view_size: Size<f64, Logical>,
scale: f64,
clock: Clock,
config: &Config,
) -> Self {
let mut shadow_config = config.layout.shadow;
// Shadows for layer surfaces need to be explicitly enabled.
shadow_config.on = false;
let shadow_config = rules.shadow.resolve_against(shadow_config);
Self {
surface,
rules,
block_out_buffer: SolidColorBuffer::new((0., 0.), [0., 0., 0., 1.]),
view_size,
scale,
shadow: Shadow::new(shadow_config),
clock,
}
}
pub fn update_config(&mut self, config: &Config) {
let mut shadow_config = config.layout.shadow;
// Shadows for layer surfaces need to be explicitly enabled.
shadow_config.on = false;
let shadow_config = self.rules.shadow.resolve_against(shadow_config);
self.shadow.update_config(shadow_config);
}
pub fn update_shaders(&mut self) {
self.shadow.update_shaders();
}
pub fn update_sizes(&mut self, view_size: Size<f64, Logical>, scale: f64) {
self.view_size = view_size;
self.scale = scale;
}
pub fn update_render_elements(&mut self, size: Size<f64, Logical>) {
// Round to physical pixels.
let size = size
.to_physical_precise_round(self.scale)
.to_logical(self.scale);
self.block_out_buffer.resize(size);
let radius = self.rules.geometry_corner_radius.unwrap_or_default();
// FIXME: is_active based on keyboard focus?
self.shadow
.update_render_elements(size, true, radius, self.scale, 1.);
}
pub fn are_animations_ongoing(&self) -> bool {
self.rules.baba_is_float
}
pub fn surface(&self) -> &LayerSurface {
&self.surface
}
pub fn rules(&self) -> &ResolvedLayerRules {
&self.rules
}
/// Recomputes the resolved layer rules and returns whether they changed.
pub fn recompute_layer_rules(&mut self, rules: &[LayerRule], is_at_startup: bool) -> bool {
let new_rules = ResolvedLayerRules::compute(rules, &self.surface, is_at_startup);
if new_rules == self.rules {
return false;
}
self.rules = new_rules;
true
}
pub fn place_within_backdrop(&self) -> bool {
if !self.rules.place_within_backdrop {
return false;
}
if self.surface.layer() != Layer::Background {
return false;
}
let state = self.surface.cached_state();
if state.exclusive_zone != ExclusiveZone::DontCare {
return false;
}
true
}
pub fn bob_offset(&self) -> Point<f64, Logical> {
if !self.rules.baba_is_float {
return Point::from((0., 0.));
}
let y = baba_is_float_offset(self.clock.now(), self.view_size.h);
let y = round_logical_in_physical(self.scale, y);
Point::from((0., y))
}
pub fn render<R: NiriRenderer>(
&self,
renderer: &mut R,
location: Point<f64, Logical>,
target: RenderTarget,
) -> SplitElements<LayerSurfaceRenderElement<R>> {
let mut rv = SplitElements::default();
let scale = Scale::from(self.scale);
let alpha = self.rules.opacity.unwrap_or(1.).clamp(0., 1.);
let location = location + self.bob_offset();
if target.should_block_out(self.rules.block_out_from) {
// Round to physical pixels.
let location = location.to_physical_precise_round(scale).to_logical(scale);
// FIXME: take geometry-corner-radius into account.
let elem = SolidColorRenderElement::from_buffer(
&self.block_out_buffer,
location,
alpha,
Kind::Unspecified,
);
rv.normal.push(elem.into());
} else {
// Layer surfaces don't have extra geometry like windows.
let buf_pos = location;
let surface = self.surface.wl_surface();
for (popup, popup_offset) in PopupManager::popups_for_surface(surface) {
// Layer surfaces don't have extra geometry like windows.
let offset = popup_offset - popup.geometry().loc;
rv.popups.extend(render_elements_from_surface_tree(
renderer,
popup.wl_surface(),
(buf_pos + offset.to_f64()).to_physical_precise_round(scale),
scale,
alpha,
Kind::ScanoutCandidate,
));
}
rv.normal = render_elements_from_surface_tree(
renderer,
surface,
buf_pos.to_physical_precise_round(scale),
scale,
alpha,
Kind::ScanoutCandidate,
);
}
let location = location.to_physical_precise_round(scale).to_logical(scale);
rv.normal
.extend(self.shadow.render(renderer, location).map(Into::into));
rv
}
}
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