Extract center_preferring_top_left_in_area()

src/layout/floating.rs

@@ -16,7 +16,10 @@ use crate::niri_render_elements;
 use crate::render_helpers::renderer::NiriRenderer;
 use crate::render_helpers::RenderTarget;
 use crate::utils::transaction::TransactionBlocker;
-use crate::utils::{clamp_preferring_top_left_in_area, ensure_min_max_size, ResizeEdge};
+use crate::utils::{
+    center_preferring_top_left_in_area, clamp_preferring_top_left_in_area, ensure_min_max_size,
+    ResizeEdge,
+};
 use crate::window::ResolvedWindowRules;
 
 /// Space for floating windows.
@@ -386,13 +389,7 @@ impl<W: LayoutElement> FloatingSpace<W> {
         }
 
         let pos = pos.unwrap_or_else(|| {
-            let area_size = self.working_area.size.to_point();
-            let tile_size = tile.tile_size().to_point();
-            let mut offset = (area_size - tile_size).downscale(2.);
-            // Prefer top-left corner if larger than the working area.
-            offset.x = f64::max(offset.x, 0.);
-            offset.y = f64::max(offset.y, 0.);
-            self.working_area.loc + offset
+            center_preferring_top_left_in_area(self.working_area, tile.tile_size())
         });
 
         let data = Data::new(self.working_area, &tile, pos);

src/utils/mod.rs

@@ -284,6 +284,18 @@ pub fn clamp_preferring_top_left_in_area(
     rect.loc.y = f64::max(rect.loc.y, area.loc.y);
 }
 
+pub fn center_preferring_top_left_in_area(
+    area: Rectangle<f64, Logical>,
+    size: Size<f64, Logical>,
+) -> Point<f64, Logical> {
+    let area_size = area.size.to_point();
+    let size = size.to_point();
+    let mut offset = (area_size - size).downscale(2.);
+    offset.x = f64::max(offset.x, 0.);
+    offset.y = f64::max(offset.y, 0.);
+    area.loc + offset
+}
+
 #[cfg(feature = "dbus")]
 pub fn show_screenshot_notification(image_path: Option<PathBuf>) {
     let mut notification = notify_rust::Notification::new();