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use std::cell::RefCell;
use std::collections::HashMap;
use pangocairo::cairo::{self, ImageSurface};
use pangocairo::pango::{Alignment, FontDescription};
use smithay::backend::renderer::element::memory::{
MemoryRenderBuffer, MemoryRenderBufferRenderElement,
};
use smithay::backend::renderer::element::utils::{Relocate, RelocateRenderElement};
use smithay::backend::renderer::element::{Element, Kind};
use smithay::output::Output;
use smithay::reexports::gbm::Format as Fourcc;
use smithay::utils::Transform;
use crate::render_helpers::renderer::NiriRenderer;
const TEXT: &str = "Are you sure you want to exit niri?\n\n\
Press <span face='mono' bgcolor='#2C2C2C'> Enter </span> to confirm.";
const PADDING: i32 = 16;
const FONT: &str = "sans 14px";
const BORDER: i32 = 8;
pub struct ExitConfirmDialog {
is_open: bool,
buffers: RefCell<HashMap<i32, Option<MemoryRenderBuffer>>>,
}
pub type ExitConfirmDialogRenderElement<R> =
RelocateRenderElement<MemoryRenderBufferRenderElement<R>>;
impl ExitConfirmDialog {
pub fn new() -> anyhow::Result<Self> {
Ok(Self {
is_open: false,
buffers: RefCell::new(HashMap::from([(1, Some(render(1)?))])),
})
}
pub fn show(&mut self) -> bool {
if !self.is_open {
self.is_open = true;
true
} else {
false
}
}
pub fn hide(&mut self) -> bool {
if self.is_open {
self.is_open = false;
true
} else {
false
}
}
pub fn is_open(&self) -> bool {
self.is_open
}
pub fn render<R: NiriRenderer>(
&self,
renderer: &mut R,
output: &Output,
) -> Option<ExitConfirmDialogRenderElement<R>> {
if !self.is_open {
return None;
}
let scale = output.current_scale().integer_scale();
let mut buffers = self.buffers.borrow_mut();
let fallback = buffers[&1].clone().unwrap();
let buffer = buffers.entry(scale).or_insert_with(|| render(scale).ok());
let buffer = buffer.as_ref().unwrap_or(&fallback);
let elem = MemoryRenderBufferRenderElement::from_buffer(
renderer,
(0., 0.),
buffer,
None,
None,
None,
Kind::Unspecified,
)
.ok()?;
let output_transform = output.current_transform();
let output_mode = output.current_mode().unwrap();
let output_size = output_transform.transform_size(output_mode.size);
let buffer_size = elem
.geometry(output.current_scale().fractional_scale().into())
.size;
let x = (output_size.w / 2 - buffer_size.w / 2).max(0);
let y = (output_size.h / 2 - buffer_size.h / 2).max(0);
let elem = RelocateRenderElement::from_element(elem, (x, y), Relocate::Absolute);
Some(elem)
}
}
fn render(scale: i32) -> anyhow::Result<MemoryRenderBuffer> {
let _span = tracy_client::span!("exit_confirm_dialog::render");
let padding = PADDING * scale;
let mut font = FontDescription::from_string(FONT);
font.set_absolute_size((font.size() * scale).into());
let surface = ImageSurface::create(cairo::Format::ARgb32, 0, 0)?;
let cr = cairo::Context::new(&surface)?;
let layout = pangocairo::functions::create_layout(&cr);
layout.set_font_description(Some(&font));
layout.set_alignment(Alignment::Center);
layout.set_markup(TEXT);
let (mut width, mut height) = layout.pixel_size();
width += padding * 2;
height += padding * 2;
// FIXME: fix bug in Smithay that rounds pixel sizes down to scale.
width = (width + scale - 1) / scale * scale;
height = (height + scale - 1) / scale * scale;
let surface = ImageSurface::create(cairo::Format::ARgb32, width, height)?;
let cr = cairo::Context::new(&surface)?;
cr.set_source_rgb(0.1, 0.1, 0.1);
cr.paint()?;
cr.move_to(padding.into(), padding.into());
let layout = pangocairo::functions::create_layout(&cr);
layout.set_font_description(Some(&font));
layout.set_alignment(Alignment::Center);
layout.set_markup(TEXT);
cr.set_source_rgb(1., 1., 1.);
pangocairo::functions::show_layout(&cr, &layout);
cr.move_to(0., 0.);
cr.line_to(width.into(), 0.);
cr.line_to(width.into(), height.into());
cr.line_to(0., height.into());
cr.line_to(0., 0.);
cr.set_source_rgb(1., 0.3, 0.3);
cr.set_line_width((BORDER * scale).into());
cr.stroke()?;
drop(cr);
let data = surface.take_data().unwrap();
let buffer = MemoryRenderBuffer::from_slice(
&data,
Fourcc::Argb8888,
(width, height),
scale,
Transform::Normal,
None,
);
Ok(buffer)
}
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