shell/tiling: Implement window swap mode

src/shell/element/swap_indicator.rs

@@ -0,0 +1,58 @@
+use crate::{
+    fl,
+    utils::iced::{IcedElement, Program},
+};
+
+use apply::Apply;
+use calloop::LoopHandle;
+use cosmic::{
+    iced::widget::{container, horizontal_space, row},
+    iced_core::{Alignment, Background, Color, Length},
+    theme,
+    widget::{icon, text},
+};
+use smithay::utils::Size;
+
+pub type SwapIndicator = IcedElement<SwapIndicatorInternal>;
+
+pub fn swap_indicator(evlh: LoopHandle<'static, crate::state::Data>) -> SwapIndicator {
+    SwapIndicator::new(SwapIndicatorInternal, Size::from((1, 1)), evlh)
+}
+
+pub struct SwapIndicatorInternal;
+
+impl Program for SwapIndicatorInternal {
+    type Message = ();
+
+    fn view(&self) -> crate::utils::iced::Element<'_, Self::Message> {
+        row(vec![
+            icon("window-swap-symbolic", 32).force_svg(true).into(),
+            horizontal_space(16).into(),
+            text(fl!("swap-windows"))
+                .font(cosmic::font::FONT)
+                .size(24)
+                .into(),
+        ])
+        .align_items(Alignment::Center)
+        .apply(container)
+        .center_x()
+        .center_y()
+        .padding(16)
+        .apply(container)
+        .style(theme::Container::custom(|theme| container::Appearance {
+            text_color: Some(Color::from(theme.cosmic().accent.on)),
+            background: Some(Background::Color(theme.cosmic().accent_color().into())),
+            border_radius: 18.0.into(),
+            border_width: 0.0,
+            border_color: Color::TRANSPARENT,
+        }))
+        .width(Length::Shrink)
+        .height(Length::Shrink)
+        .apply(container)
+        .height(Length::Fill)
+        .width(Length::Fill)
+        .center_x()
+        .center_y()
+        .into()
+    }
+}