61 lines
2.3 KiB
Rust
61 lines
2.3 KiB
Rust
use crate::{state::State, utils::prelude::SeatExt};
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use smithay::{
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delegate_fractional_scale,
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desktop::utils::surface_primary_scanout_output,
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reexports::wayland_server::protocol::wl_surface::WlSurface,
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wayland::{
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compositor::{get_parent, with_states},
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fractional_scale::{with_fractional_scale, FractionalScaleHandler},
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},
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};
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impl FractionalScaleHandler for State {
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fn new_fractional_scale(&mut self, surface: WlSurface) {
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// Here we can set the initial fractional scale
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//
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// First we look if the surface already has a primary scan-out output, if not
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// we test if the surface is a subsurface and try to use the primary scan-out output
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// of the root surface. If the root also has no primary scan-out output we just try
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// to use the first output of the toplevel.
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// If the surface is the root we also try to use the first output of the toplevel.
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//
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// If all the above tests do not lead to a output we just use the active output
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// of the last active seat (which will also be the output a toplevel will
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// initially be placed on)
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let output = with_states(&surface, |states| {
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surface_primary_scanout_output(&surface, states)
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})
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.or_else(|| {
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let mut root = surface.clone();
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while let Some(parent) = get_parent(&root) {
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root = parent;
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}
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(root != surface)
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.then(|| {
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with_states(&root, |states| {
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surface_primary_scanout_output(&root, states)
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})
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})
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.flatten()
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.or_else(|| {
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self.common
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.shell
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.visible_outputs_for_surface(&surface)
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.next()
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})
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})
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.unwrap_or_else(|| {
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let seat = self.common.last_active_seat();
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seat.active_output()
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});
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with_states(&surface, |states| {
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with_fractional_scale(states, |fractional_scale| {
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fractional_scale.set_preferred_scale(output.current_scale().fractional_scale());
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});
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});
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}
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}
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delegate_fractional_scale!(State);
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