[gtk/fix-3793-4-2: 3/3] gdksurface-win32.c: Fix up popup placement

[Chun-wei Fan <fanchunwei src gnome org>]

commit 90bd5a04fd518a6783815194bac7157cbe4d5810
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Jun 16 12:24:47 2021 +0800

    gdksurface-win32.c: Fix up popup placement
    
    If we are undergoing a surface move, just apply the next_layout anyways,
    even if we are not moving a toplevel surface.
    
    Update the way how we obtain the x and y coordinates of a surface, if it
    is a toplevel, apply the x and y coordinates from the results from we
    obtained the underlying Win32 HWND, as we did before.  But if it is a
    popup, use gdk_win32_surface_get_geometry() to obtain the correct x and
    y coordinates to place our popup surface.
    
    Also correct how we compute the shadow dimensions, and the final popup
    rectangle as we attempt to layout the popup surface, since GDK-Win32
    keeps track of the shadow dimensions in system (unscaled) units, not GDK
    units.
    
    Fixes issue #3793.

 gdk/win32/gdksurface-win32.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)
---
diff --git a/gdk/win32/gdksurface-win32.c b/gdk/win32/gdksurface-win32.c
index ae58743ea7..4c8eae9ef9 100644
--- a/gdk/win32/gdksurface-win32.c
+++ b/gdk/win32/gdksurface-win32.c
@@ -1227,6 +1227,7 @@ gdk_win32_surface_layout_popup (GdkSurface     *surface,
                                      &shadow_right,
                                      &shadow_top,
                                      &shadow_bottom);
+
   gdk_win32_surface_set_shadow_width (surface,
                                       shadow_left,
                                       shadow_right,
@@ -1236,10 +1237,10 @@ gdk_win32_surface_layout_popup (GdkSurface     *surface,
   gdk_surface_layout_popup_helper (surface,
                                    width,
                                    height,
-                                   impl->shadow.left,
-                                   impl->shadow.right,
-                                   impl->shadow.top,
-                                   impl->shadow.bottom,
+                                   shadow_left,
+                                   shadow_right,
+                                   shadow_top,
+                                   shadow_bottom,
                                    monitor,
                                    &bounds,
                                    layout,
@@ -1259,9 +1260,7 @@ gdk_win32_surface_layout_popup (GdkSurface     *surface,
                                      final_rect.height);
     }
   else
-    {
-      gdk_win32_surface_move (surface, x, y);
-    }
+    gdk_win32_surface_move (surface, x, y);
 }
 
 static void
@@ -4415,9 +4414,9 @@ gdk_win32_surface_set_shadow_width (GdkSurface *window,
   if (impl->zero_shadow)
     return;
 
-  impl->shadow.left = left;
+  impl->shadow.left = left * impl->surface_scale;;
   impl->shadow.right = right * impl->surface_scale;
-  impl->shadow.top = top;
+  impl->shadow.top = top * impl->surface_scale;;
   impl->shadow.bottom = bottom * impl->surface_scale;
   impl->shadow_x = left + right;
   impl->shadow_y = top + bottom;
@@ -4553,7 +4552,7 @@ _gdk_win32_surface_request_layout (GdkSurface *surface)
   int scale = impl->surface_scale;
   RECT rect;
 
-  if (GDK_IS_TOPLEVEL (surface) && impl->drag_move_resize_context.native_move_resize_pending)
+  if (impl->drag_move_resize_context.native_move_resize_pending)
     {
       surface->width = impl->next_layout.configured_width;
       surface->height = impl->next_layout.configured_height;
@@ -4564,8 +4563,18 @@ _gdk_win32_surface_request_layout (GdkSurface *surface)
 
       impl->next_layout.configured_width = (rect.right - rect.left + scale - 1) / scale;
       impl->next_layout.configured_height = (rect.bottom - rect.top + scale - 1) / scale;
-      surface->x = rect.left / scale;
-      surface->y = rect.top / scale;
+
+      if (GDK_IS_TOPLEVEL (surface))
+        {
+          surface->x = rect.left / scale;
+          surface->y = rect.top / scale;
+        }
+      else if (GDK_IS_POPUP (surface))
+        {
+          gdk_win32_surface_get_geometry (surface,
+                                         &surface->x, &surface->y,
+                                          NULL, NULL);
+        }
     }
 }