From 299a0480fc04b7befcb768eeb98d187cf12487d1 Mon Sep 17 00:00:00 2001
From: Adam Williamson <awilliam@redhat.com>
Date: Thu, 5 Oct 2023 13:09:46 -0700
Subject: [PATCH] Revert "x11: Use input region from frame window for decorated
 windows"

This reverts commit d991961ae2a5c8cf2e58ff1072239f4902b0f767. It
seems to cause the broken mouse interaction bug reported in
https://bugzilla.redhat.com/show_bug.cgi?id=2239128 .

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3068
---
 src/core/frame.c     |  7 -------
 src/x11/window-x11.c | 29 ++++++++++-------------------
 2 files changed, 10 insertions(+), 26 deletions(-)

diff --git a/src/core/frame.c b/src/core/frame.c
index 6b97306a1c..0f2eb349d1 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -34,7 +34,6 @@
 #include "x11/window-props.h"
 
 #include <X11/Xatom.h>
-#include <X11/extensions/shape.h>
 
 #define EVENT_MASK (SubstructureRedirectMask |                     \
                     StructureNotifyMask | SubstructureNotifyMask | \
@@ -108,9 +107,6 @@ meta_window_set_frame_xwindow (MetaWindow *window,
   XChangeWindowAttributes (x11_display->xdisplay,
 			   frame->xwindow, CWEventMask, &attrs);
 
-  if (META_X11_DISPLAY_HAS_SHAPE (x11_display))
-    XShapeSelectInput (x11_display->xdisplay, frame->xwindow, ShapeNotifyMask);
-
   meta_x11_display_register_x_window (x11_display, &frame->xwindow, window);
 
   if (window->mapped)
@@ -219,9 +215,6 @@ meta_window_destroy_frame (MetaWindow *window)
       window->reparents_pending += 1;
     }
 
-  if (META_X11_DISPLAY_HAS_SHAPE (x11_display))
-    XShapeSelectInput (x11_display->xdisplay, frame->xwindow, NoEventMask);
-
   XDeleteProperty (x11_display->xdisplay,
                    window->xwindow,
                    x11_display->atom__MUTTER_NEEDS_FRAME);
diff --git a/src/x11/window-x11.c b/src/x11/window-x11.c
index ce6dcf968b..7574948aed 100644
--- a/src/x11/window-x11.c
+++ b/src/x11/window-x11.c
@@ -2027,10 +2027,6 @@ meta_window_x11_constructed (GObject *object)
   window->hidden = FALSE;
   priv->border_width = attrs.border_width;
 
-  g_signal_connect (window, "notify::decorated",
-                    G_CALLBACK (meta_window_x11_update_input_region),
-                    window);
-
   G_OBJECT_CLASS (meta_window_x11_parent_class)->constructed (object);
 }
 
@@ -2314,21 +2310,16 @@ meta_window_x11_update_input_region (MetaWindow *window)
   g_autoptr (MtkRegion) region = NULL;
   MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
   MetaWindowX11Private *priv = meta_window_x11_get_instance_private (window_x11);
-  Window xwindow;
 
+  /* Decorated windows don't have an input region, because
+     we don't shape the frame to match the client windows
+     (so the events are blocked by the frame anyway)
+  */
   if (window->decorated)
     {
-      if (!window->frame)
-        {
-          if (window->input_region)
-            meta_window_set_input_region (window, NULL);
-          return;
-        }
-      xwindow = window->frame->xwindow;
-    }
-  else
-    {
-      xwindow = window->xwindow;
+      if (window->input_region)
+        meta_window_set_input_region (window, NULL);
+      return;
     }
 
   if (META_X11_DISPLAY_HAS_SHAPE (x11_display))
@@ -2340,7 +2331,7 @@ meta_window_x11_update_input_region (MetaWindow *window)
 
       meta_x11_error_trap_push (x11_display);
       rects = XShapeGetRectangles (x11_display->xdisplay,
-                                   xwindow,
+                                   window->xwindow,
                                    ShapeInput,
                                    &n_rects,
                                    &ordering);
@@ -2394,8 +2385,8 @@ meta_window_x11_update_input_region (MetaWindow *window)
 
       client_area.x = 0;
       client_area.y = 0;
-      client_area.width = window->buffer_rect.width;
-      client_area.height = window->buffer_rect.height;
+      client_area.width = priv->client_rect.width;
+      client_area.height = priv->client_rect.height;
 
       /* The shape we get back from the client may have coordinates
        * outside of the frame. The X SHAPE Extension requires that
-- 
2.43.0