refactor: use icon type when starting dnd

dnd/src/lib.rs

@@ -119,6 +119,18 @@ pub struct DndDestinationRectangle {
     pub preferred: DndAction,
 }
 
+#[derive(Clone)]
+pub enum Icon {
+    Surface(DndSurface),
+    /// Xrgb8888 or Argb8888 image data with premultiplied alpha
+    Buffer {
+        data: Arc<Vec<u8>>,
+        width: u32,
+        height: u32,
+        transparent: bool,
+    },
+}
+
 #[derive(Clone)]
 pub struct DndSurface(pub Arc<Box<dyn RawSurface + 'static + Send + Sync>>);
 

dnd/src/platform/linux.rs

@@ -1,6 +1,6 @@
 use std::{borrow::Cow, ffi::c_void, sync::Arc};
 
-use crate::{DataWrapper, DndAction, DndSurface};
+use crate::{DataWrapper, DndAction, DndSurface, Icon};
 use smithay_clipboard::mime::{AllowedMimeTypes, AsMimeTypes, MimeType};
 
 impl<
@@ -87,3 +87,25 @@ impl From<DndAction>
         a
     }
 }
+
+impl From<Icon> for smithay_clipboard::dnd::Icon<DndSurface> {
+    fn from(icon: Icon) -> Self {
+        match icon {
+            Icon::Surface(surface) => {
+                smithay_clipboard::dnd::Icon::Surface(surface)
+            }
+            Icon::Buffer {
+                data,
+                width,
+                height,
+                transparent,
+            } => smithay_clipboard::dnd::Icon::Buf {
+                data: Arc::try_unwrap(data)
+                    .unwrap_or_else(|d| d.as_ref().clone()),
+                width,
+                height,
+                transparent,
+            },
+        }
+    }
+}