view: forbid mode change if cursor target

Making a floating view tiled during a resize breaks things badly.

river/InputManager.zig

@@ -26,6 +26,7 @@ const util = @import("util.zig");
 
 const Seat = @import("Seat.zig");
 const Server = @import("Server.zig");
+const View = @import("View.zig");
 
 const default_seat_name = "default";
 
@@ -101,6 +102,18 @@ pub fn inputAllowed(self: Self, wlr_surface: *c.wlr_surface) bool {
         true;
 }
 
+pub fn isCursorActionTarget(self: Self, view: *View) bool {
+    var it = self.seats.first;
+    return while (it) |node| : (it = node.next) {
+        const seat = &node.data;
+        switch (seat.cursor.mode) {
+            .passthrough => {},
+            .move => |data| if (data.view == view) break true,
+            .resize => |data| if (data.view == view) break true,
+        }
+    } else false;
+}
+
 fn handleInhibitActivate(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
     const self = @fieldParentPtr(Self, "listen_inhibit_activate", listener.?);
 

river/command/toggle_float.zig

@@ -36,6 +36,9 @@ pub fn toggleFloat(
         // Don't float fullscreen views
         if (view.pending.fullscreen) return;
 
+        // Don't modify views which are the target of a cursor action
+        if (seat.input_manager.isCursorActionTarget(view)) return;
+
         if (!view.pending.float) view.pending.box = view.float_box;
         view.pending.float = !view.pending.float;
         view.output.root.arrange();

river/command/toggle_fullscreen.zig

@@ -30,7 +30,12 @@ pub fn toggleFullscreen(
     if (args.len > 1) return Error.TooManyArguments;
 
     if (seat.focused == .view) {
-        seat.focused.view.setFullscreen(!seat.focused.view.pending.fullscreen);
-        seat.focused.view.output.root.arrange();
+        const view = seat.focused.view;
+
+        // Don't modify views which are the target of a cursor action
+        if (seat.input_manager.isCursorActionTarget(view)) return;
+
+        view.setFullscreen(!seat.focused.view.pending.fullscreen);
+        view.output.root.arrange();
     }
 }