Hide cursor while warping on Wayland

Based on https://gitlab.freedesktop.org/xorg/xserver/-/issues/734 we
hide the window cursor prior to warping, which allows XWayland to
reposition the cursor.  This is only performed when Wayland is detected;
all other configurations call the standard warp routine

Fixes https://gitlab.com/kicad/code/kicad/issues/9785

common/view/wx_view_controls.cpp

@@ -248,7 +248,7 @@ void WX_VIEW_CONTROLS::onMotion( wxMouseEvent& aEvent )
             {
                 if( !justWarped )
                 {
-                    m_parentPanel->WarpPointer( x + warpX, y + warpY );
+                    KIPLATFORM::UI::WarpPointer( m_parentPanel, x + warpX, y + warpY );
                     m_dragStartPoint += VECTOR2D( warpX, warpY );
                     justWarped = true;
                 }
@@ -290,7 +290,7 @@ void WX_VIEW_CONTROLS::onMotion( wxMouseEvent& aEvent )
             {
                 if( !justWarped )
                 {
-                    m_parentPanel->WarpPointer( x, y + warpY );
+                    KIPLATFORM::UI::WarpPointer( m_parentPanel, x, y + warpY );
                     m_dragStartPoint += VECTOR2D( 0, warpY );
                     justWarped = true;
                 }
@@ -741,17 +741,17 @@ void WX_VIEW_CONTROLS::WarpMouseCursor( const VECTOR2D& aPosition, bool aWorldCo
             if( aWarpView )
             {
                 m_view->SetCenter( clampedPosition );
-                m_parentPanel->WarpPointer( screenSize.x / 2, screenSize.y / 2 );
+                KIPLATFORM::UI::WarpPointer( m_parentPanel, screenSize.x / 2, screenSize.y / 2 );
             }
         }
         else
         {
-            m_parentPanel->WarpPointer( screenPos.x, screenPos.y );
+            KIPLATFORM::UI::WarpPointer( m_parentPanel, screenPos.x, screenPos.y );
         }
     }
     else
     {
-        m_parentPanel->WarpPointer( aPosition.x, aPosition.y );
+        KIPLATFORM::UI::WarpPointer( m_parentPanel, aPosition.x, aPosition.y );
     }
 
     refreshMouse();
@@ -766,7 +766,7 @@ void WX_VIEW_CONTROLS::CenterOnCursor() const
     if( GetMousePosition( false ) != screenCenter )
     {
         m_view->SetCenter( GetCursorPosition() );
-        m_parentPanel->WarpPointer( KiROUND( screenSize.x / 2 ), KiROUND( screenSize.y / 2 ) );
+        KIPLATFORM::UI::WarpPointer( m_parentPanel, KiROUND( screenSize.x / 2 ), KiROUND( screenSize.y / 2 ) );
     }
 }
 
@@ -909,7 +909,7 @@ void WX_VIEW_CONTROLS::handleCursorCapture( int x, int y )
         }
 
         if( warp )
-            m_parentPanel->WarpPointer( x, y );
+            KIPLATFORM::UI::WarpPointer( m_parentPanel, x, y );
     }
 }
 

libs/kiplatform/gtk/ui.cpp

@@ -26,7 +26,7 @@
 #include <wx/window.h>
 
 #include <gtk/gtk.h>
-
+#include <gdk/gdk.h>
 
 bool KIPLATFORM::UI::IsDarkTheme()
 {
@@ -81,6 +81,7 @@ bool KIPLATFORM::UI::IsStockCursorOk( wxStockCursor aCursor )
     case wxCURSOR_BULLSEYE:
     case wxCURSOR_HAND:
     case wxCURSOR_ARROW:
+    case wxCURSOR_BLANK:
         return true;
     default:
         return false;
@@ -144,3 +145,26 @@ bool KIPLATFORM::UI::AllowIconsInMenus()
 
     return !!allowed;
 }
+
+
+void KIPLATFORM::UI::WarpPointer( wxWindow* aWindow, int aX, int aY )
+{
+    if( !wxGetEnv( wxT( "WAYLAND_DISPLAY" ), nullptr ) )
+    {
+        aWindow->WarpPointer( aX, aY );
+    }
+    else
+    {
+        GdkDisplay* disp = gtk_widget_get_display( static_cast<GtkWidget*>( aWindow->GetHandle() ) );
+        GdkWindow* win = gdk_display_get_window_at_pointer( disp, nullptr, nullptr );
+        GdkCursor* blank_cursor = gdk_cursor_new_for_display( disp, GDK_BLANK_CURSOR );
+        GdkCursor* cur_cursor = gdk_window_get_cursor( win );
+
+        if( cur_cursor )
+            g_object_ref( cur_cursor );
+
+        gdk_window_set_cursor( win, blank_cursor );
+        aWindow->WarpPointer( aX, aY );
+        gdk_window_set_cursor( win, cur_cursor );
+    }
+}

libs/kiplatform/include/kiplatform/ui.h

@@ -120,6 +120,14 @@ namespace KIPLATFORM
          * If the user has disabled icons system-wide, we check that here
          */
         bool AllowIconsInMenus();
+
+        /**
+         * Move the mouse cursor to a specific position relative to the window
+         * @param aWindow Window in which to position to mouse cursor
+         * @param aX destination x position
+         * @param aY destination y position
+         */
+        void WarpPointer( wxWindow* aWindow, int aX, int aY );
     }
 }
 

libs/kiplatform/msw/ui.cpp

@@ -138,3 +138,9 @@ bool KIPLATFORM::UI::AllowIconsInMenus()
 {
     return true;
 }
+
+
+void KIPLATFORM::UI::WarpPointer( wxWindow* aWindow, int aX, int aY )
+{
+    aWindow->WarpPointer( aX, aY );
+}

libs/kiplatform/osx/ui.mm

@@ -137,4 +137,10 @@ void KIPLATFORM::UI::SetOverlayScrolling( const wxWindow* aWindow, bool overlay
 bool KIPLATFORM::UI::AllowIconsInMenus()
 {
     return true;
-}
+}
+
+
+void KIPLATFORM::UI::WarpPointer( wxWindow* aWindow, int aX, int aY )
+{
+    aWindow->WarpPointer( aX, aY );
+}