river: render floating views above the layout

 river/Output.zig |  9 ++++++---
 river/Root.zig   | 16 ++++++++++++++--
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/river/Output.zig b/river/Output.zig
index 4c34436..828b85d 100644
--- a/river/Output.zig
+++ b/river/Output.zig
@@ -59,8 +59,10 @@ layers: struct {
     background: *wlr.SceneTree,
     /// Bottom layer shell layer
     bottom: *wlr.SceneTree,
-    /// Tiled and floating views
-    views: *wlr.SceneTree,
+    /// Views in the layout
+    layout: *wlr.SceneTree,
+    /// Floating views
+    float: *wlr.SceneTree,
     /// Top layer shell layer
     top: *wlr.SceneTree,
     /// Fullscreen views
@@ -227,7 +229,8 @@ pub fn create(wlr_output: *wlr.Output) !void {
             ),
             .background = try normal_content.createSceneTree(),
             .bottom = try normal_content.createSceneTree(),
-            .views = try normal_content.createSceneTree(),
+            .layout = try normal_content.createSceneTree(),
+            .float = try normal_content.createSceneTree(),
             .top = try normal_content.createSceneTree(),
             .fullscreen = try normal_content.createSceneTree(),
             .overlay = try normal_content.createSceneTree(),
diff --git a/river/Root.zig b/river/Root.zig
index 518d94a..7245e58 100644
--- a/river/Root.zig
+++ b/river/Root.zig
@@ -607,13 +607,25 @@ fn commitTransaction(root: *Self) void {
 
             view.inflight_serial = null;
 
-            if (view.current.output != output or
+            if (view.current.output != view.inflight.output or
                 (output.current.fullscreen == view and output.inflight.fullscreen != view))
             {
-                view.tree.node.reparent(output.layers.views);
+                if (view.inflight.float) {
+                    view.tree.node.reparent(output.layers.float);
+                } else {
+                    view.tree.node.reparent(output.layers.layout);
+                }
                 view.popup_tree.node.reparent(output.layers.popups);
             }
 
+            if (view.current.float != view.inflight.float) {
+                if (view.inflight.float) {
+                    view.tree.node.reparent(output.layers.float);
+                } else {
+                    view.tree.node.reparent(output.layers.layout);
+                }
+            }
+
             view.updateCurrent();
 
             const enabled = view.current.tags & output.current.tags != 0;