Root: use attach mode top when restoring from fallback

river/Root.zig

@@ -311,7 +311,7 @@ pub fn deactivateOutput(root: *Root, output: *Output) void {
     };
     if (fallback_output) |fallback| {
         var it = output.pending.focus_stack.safeIterator(.reverse);
-        while (it.next()) |view| view.setPendingOutput(fallback);
+        while (it.next()) |view| view.setPendingOutput(fallback, fallback.attachMode());
     } else {
         var it = output.pending.focus_stack.iterator(.forward);
         while (it.next()) |view| view.pending.output = null;
@@ -390,7 +390,7 @@ pub fn activateOutput(root: *Root, output: *Output) void {
         output.pending.tags = root.fallback_pending.tags;
         {
             var it = root.fallback_pending.wm_stack.safeIterator(.reverse);
-            while (it.next()) |view| view.setPendingOutput(output);
+            while (it.next()) |view| view.setPendingOutput(output, .top);
         }
         {
             // Focus the new output with all seats
@@ -407,7 +407,7 @@ pub fn activateOutput(root: *Root, output: *Output) void {
             const name = view.output_before_evac orelse continue;
             if (mem.eql(u8, name, mem.span(output.wlr_output.name))) {
                 if (view.pending.output != output) {
-                    view.setPendingOutput(output);
+                    view.setPendingOutput(output, output.attachMode());
                 }
                 util.gpa.free(name);
                 view.output_before_evac = null;

river/View.zig

@@ -28,6 +28,7 @@ const wp = @import("wayland").server.wp;
 const server = &@import("main.zig").server;
 const util = @import("util.zig");
 
+const Config = @import("Config.zig");
 const ForeignToplevelHandle = @import("ForeignToplevelHandle.zig");
 const Output = @import("Output.zig");
 const SceneNodeData = @import("SceneNodeData.zig");
@@ -529,12 +530,12 @@ fn saveSurfaceTreeIter(
     saved.setTransform(buffer.transform);
 }
 
-pub fn setPendingOutput(view: *View, output: *Output) void {
+pub fn setPendingOutput(view: *View, output: *Output, attach_mode: Config.AttachMode) void {
     view.pending.output = output;
     view.pending_wm_stack_link.remove();
     view.pending_focus_stack_link.remove();
 
-    switch (output.attachMode()) {
+    switch (attach_mode) {
         .top => output.pending.wm_stack.prepend(view),
         .bottom => output.pending.wm_stack.append(view),
         .after => |n| view.attachAfter(&output.pending, n),
@@ -709,7 +710,7 @@ pub fn map(view: *View) !void {
     };
 
     if (output) |o| {
-        view.setPendingOutput(o);
+        view.setPendingOutput(o, o.attachMode());
 
         var it = server.input_manager.seats.iterator(.forward);
         while (it.next()) |seat| seat.focus(view);

river/command/output.zig

@@ -78,7 +78,7 @@ pub fn sendToOutput(
             seat.focused.view.pending.tags = destination_output.pending.tags;
         }
 
-        seat.focused.view.setPendingOutput(destination_output);
+        seat.focused.view.setPendingOutput(destination_output, destination_output.attachMode());
 
         // When explicitly sending a view to an output, the user likely
         // does not expect a previously evacuated view moved back to a