overview: Add DnD up/down scrolling

niri-config/src/lib.rs

@@ -1208,6 +1208,8 @@ pub struct SpringParams {
 pub struct Gestures {
     #[knuffel(child, default)]
     pub dnd_edge_view_scroll: DndEdgeViewScroll,
+    #[knuffel(child, default)]
+    pub dnd_edge_workspace_switch: DndEdgeWorkspaceSwitch,
 }
 
 #[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
@@ -1230,6 +1232,26 @@ impl Default for DndEdgeViewScroll {
     }
 }
 
+#[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
+pub struct DndEdgeWorkspaceSwitch {
+    #[knuffel(child, unwrap(argument), default = Self::default().trigger_height)]
+    pub trigger_height: FloatOrInt<0, 65535>,
+    #[knuffel(child, unwrap(argument), default = Self::default().delay_ms)]
+    pub delay_ms: u16,
+    #[knuffel(child, unwrap(argument), default = Self::default().max_speed)]
+    pub max_speed: FloatOrInt<0, 1_000_000>,
+}
+
+impl Default for DndEdgeWorkspaceSwitch {
+    fn default() -> Self {
+        Self {
+            trigger_height: FloatOrInt(50.),
+            delay_ms: 100,
+            max_speed: FloatOrInt(1500.),
+        }
+    }
+}
+
 #[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
 pub struct Overview {
     #[knuffel(child, unwrap(argument), default = Self::default().zoom)]
@@ -4556,6 +4578,15 @@ mod tests {
                         50.0,
                     ),
                 },
+                dnd_edge_workspace_switch: DndEdgeWorkspaceSwitch {
+                    trigger_height: FloatOrInt(
+                        50.0,
+                    ),
+                    delay_ms: 100,
+                    max_speed: FloatOrInt(
+                        1500.0,
+                    ),
+                },
             },
             overview: Overview {
                 zoom: FloatOrInt(