feat: Implement set_cursor_hittest for X11

FEATURES.md

@@ -206,7 +206,7 @@ Legend:
 |Cursor locking          |❌       |✔️      |❌       |✔️          |**N/A**|**N/A**|✔️        |❌      |
 |Cursor confining        |✔️       |❌      |✔️       |✔️          |**N/A**|**N/A**|❌       |❌      |
 |Cursor icon             |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
-|Cursor hittest          |✔️       |✔️      |❌       |✔️          |**N/A**|**N/A**|❌        |❌      |
+|Cursor hittest          |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|❌        |❌      |
 |Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️        |**N/A** |
 |Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |✔️        |**N/A** |
 |Multitouch              |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |❌        |**N/A** |

src/platform_impl/linux/x11/window.rs

@@ -12,8 +12,11 @@ use x11rb::{
     connection::Connection,
     properties::{WmHints, WmHintsState, WmSizeHints, WmSizeHintsSpecification},
     protocol::{
-        randr, xinput,
+        randr,
-        xproto::{self, ConnectionExt as _},
+        shape::SK,
+        xfixes::{ConnectionExt, RegionWrapper},
+        xinput,
+        xproto::{self, ConnectionExt as _, Rectangle},
     },
 };
 
@@ -62,6 +65,7 @@ pub struct SharedState {
     pub base_size: Option<Size>,
     pub visibility: Visibility,
     pub has_focus: bool,
+    pub cursor_hittest: bool,
 }
 
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
@@ -102,6 +106,7 @@ impl SharedState {
             resize_increments: None,
             base_size: None,
             has_focus: false,
+            cursor_hittest: true,
         })
     }
 }
@@ -1286,6 +1291,10 @@ impl UnownedWindow {
         self.xconn
             .flush_requests()
             .expect("Failed to call XResizeWindow");
+        // cursor_hittest needs to be reapplied after window resize
+        if self.shared_state_lock().cursor_hittest {
+            let _ = self.set_cursor_hittest(true);
+        }
     }
 
     #[inline]
@@ -1595,8 +1604,25 @@ impl UnownedWindow {
     }
 
     #[inline]
-    pub fn set_cursor_hittest(&self, _hittest: bool) -> Result<(), ExternalError> {
+    pub fn set_cursor_hittest(&self, hittest: bool) -> Result<(), ExternalError> {
-        Err(ExternalError::NotSupported(NotSupportedError::new()))
+        let mut rectangles: Vec<Rectangle> = Vec::new();
+        if hittest {
+            let size = self.inner_size();
+            rectangles.push(Rectangle {
+                x: 0,
+                y: 0,
+                width: size.width as u16,
+                height: size.height as u16,
+            })
+        }
+        let region = RegionWrapper::create_region(self.xconn.xcb_connection(), &rectangles)
+            .map_err(|_e| ExternalError::Ignored)?;
+        self.xconn
+            .xcb_connection()
+            .xfixes_set_window_shape_region(self.xwindow, SK::INPUT, 0, 0, region.region())
+            .map_err(|_e| ExternalError::Ignored)?;
+        self.shared_state_lock().cursor_hittest = hittest;
+        Ok(())
     }
 
     /// Moves the window while it is being dragged.

src/window.rs

@@ -1445,7 +1445,7 @@ impl Window {
     ///
     /// ## Platform-specific
     ///
-    /// - **iOS / Android / Web / X11 / Orbital:** Always returns an [`ExternalError::NotSupported`].
+    /// - **iOS / Android / Web / Orbital:** Always returns an [`ExternalError::NotSupported`].
     #[inline]
     pub fn set_cursor_hittest(&self, hittest: bool) -> Result<(), ExternalError> {
         self.window