Allow toplevels to reconfigure themselves

src/server/event.rs

@@ -125,7 +125,7 @@ impl SurfaceData {
         output_name
     }
 
-    fn update_viewport(&self, dims: WindowDims, size_hints: Option<WmNormalHints>) {
+    pub(super) fn update_viewport(&self, dims: WindowDims, size_hints: Option<WmNormalHints>) {
         let width = (dims.width as f64 / self.scale_factor) as i32;
         let height = (dims.height as f64 / self.scale_factor) as i32;
         if width > 0 && height > 0 {

src/server/mod.rs

@@ -798,8 +798,8 @@ impl<C: XConnection> ServerState<C> {
         win.surface_serial = Some(serial);
     }
 
-    pub fn can_reconfigure_window(&mut self, window: x::Window) -> bool {
-        let Some(win) = self.windows.get_mut(&window) else {
+    pub fn can_change_position(&self, window: x::Window) -> bool {
+        let Some(win) = self.windows.get(&window) else {
             return true;
         };
 
@@ -851,6 +851,11 @@ impl<C: XConnection> ServerState<C> {
                 );
                 popup.popup.reposition(&popup.positioner, 0);
             }
+            Some(SurfaceRole::Toplevel(Some(_))) => {
+                win.attrs.dims.width = dims.width;
+                win.attrs.dims.height = dims.height;
+                data.update_viewport(win.attrs.dims, win.attrs.size_hints);
+            }
             other => warn!("Non popup ({other:?}) being reconfigured, behavior may be off."),
         }
     }

src/server/tests.rs

@@ -1574,17 +1574,27 @@ fn reposition_popup() {
 }
 
 #[test]
-fn ignore_toplevel_reconfigure() {
+fn toplevel_reconfigure() {
     let (mut f, comp) = TestFixture::new_with_compositor();
     let toplevel = unsafe { Window::new(1) };
-    let _ = f.create_toplevel(&comp, toplevel);
+    let (_, surface) = f.create_toplevel(&comp, toplevel);
+
+    {
+        let data = f
+            .testwl
+            .get_surface_data(surface)
+            .expect("Missing surface data");
+        let viewport = data.viewport.as_ref().expect("Missing viewport");
+        assert_eq!(viewport.width, 100);
+        assert_eq!(viewport.height, 100);
+    }
 
     f.satellite.reconfigure_window(x::ConfigureNotifyEvent::new(
         toplevel,
         toplevel,
         x::WINDOW_NONE,
-        40,  // x
-        60,  // y
+        0,   // x
+        0,   // y
         80,  // width
         100, // height
         0,
@@ -1592,16 +1602,13 @@ fn ignore_toplevel_reconfigure() {
     ));
 
     f.run();
-    let win_data = &f.connection().windows[&toplevel];
-    assert_eq!(
-        win_data.dims,
-        WindowDims {
-            x: 0,
-            y: 0,
-            width: 100,
-            height: 100
-        }
-    );
+    let data = f
+        .testwl
+        .get_surface_data(surface)
+        .expect("Missing surface data");
+    let viewport = data.viewport.as_ref().expect("Missing viewport");
+    assert_eq!(viewport.width, 80);
+    assert_eq!(viewport.height, 100);
 }
 
 type EventMatcher<'a, Event> = Box<dyn FnMut(&Event) -> bool + 'a>;

src/xstate/mod.rs

@@ -407,21 +407,19 @@ impl XState {
                     self.handle_property_change(e, server_state);
                 }
                 xcb::Event::X(x::Event::ConfigureRequest(e)) => {
-                    if !server_state.can_reconfigure_window(e.window()) {
-                        debug!("ignoring reconfigure request for {:?}", e.window());
-                        continue;
-                    }
                     debug!("{:?} request: {:?}", e.window(), e.value_mask());
 
                     let mut list = Vec::new();
                     let mask = e.value_mask();
 
+                    if server_state.can_change_position(e.window()) {
                         if mask.contains(x::ConfigWindowMask::X) {
                             list.push(x::ConfigWindow::X(e.x().into()));
                         }
                         if mask.contains(x::ConfigWindowMask::Y) {
                             list.push(x::ConfigWindow::Y(e.y().into()));
                         }
+                    }
                     if mask.contains(x::ConfigWindowMask::WIDTH) {
                         list.push(x::ConfigWindow::Width(e.width().into()));
                     }